Gear reduction box transmission mechanism and hub reduction gear

Abstract

The utility model relates to the field of speed reducers, and discloses a gear reducer transmission mechanism and a hub reduction gear. Comprising a box body with a circular-ring-shaped side wall, a sun gear is arranged at the axis position of the circular-ring-shaped side wall, a first planetary gear, a second planetary gear and a gear ring coaxial with the sun gear are arranged in the box body, and a first inner gear ring and an outer gear ring are annularly arranged on the inner side wall and the outer side wall of the gear ring correspondingly; the first planetary gear is in meshed connection with the first inner gear ring and the sun gear at the same time, a second inner gear ring is annularly arranged on the annular side wall, and the second planetary gear is in meshed connection with the second inner gear ring and the outer gear ring at the same time. The radial torque is gradually increased through the first planetary gear and the second planetary gear, so that the occupied axial space is reduced while the transmission speed reduction function is maintained, the structure is more flattened, and the planetary reducer is easy to popularize and use.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, and in particular to a gear reduction box transmission mechanism and a wheel-side reducer. Background Art

[0002] The existing gear reduction transmission mechanism is generally provided with a sun gear and a planetary gear. The sun gear is connected to the motor shaft, and the planetary gear rotates around the sun gear assembly. The speed of the output shaft is reduced by step-by-step transmission. The working principle of the planetary gear and the sun gear is just like the solar system. The rotation of the motor shaft drives the sun gear to rotate, and the planetary gear rotates around the sun gear or rotates. The traditional setting method is usually to set multiple sets of planetary gears along the axis of the sun gear. This setting will make the whole thicker, increase the distance between the input end and the output end, and occupy a large axial space, resulting in a large volume of the gear reduction transmission mechanism. It is not suitable for installation in devices with small axial space, and it is not beautiful. Utility Model Content

[0003] In order to solve at least one aspect of the above problems, the utility model first provides a gear reduction box transmission mechanism, including a case body with an annular side wall, a sun gear is provided at the axial position of the annular side wall, a first planetary gear, a second planetary gear and a gear ring coaxially arranged with the sun gear are provided in the case body, a first inner gear ring and an outer gear ring are respectively provided on the inner and outer side walls of the gear ring, the first planetary gear is meshed with the first inner gear ring and the sun gear at the same time, a second inner gear ring is provided on the inner side of the annular side wall, and the second planetary gear is meshed with the second inner gear ring and the outer gear ring at the same time.

[0004] Optionally, a mounting portion is protruding from the box body, a plurality of limit frames are protruding from the mounting portion, a mounting groove is formed between two of the limit frames, a first mounting column is protruding from the center of the mounting groove, and the first mounting column is inserted into the shaft hole of the first planetary gear so that the first planetary gear rotates in the mounting groove.

[0005] Optionally, the gear ring is arranged around the mounting portion, and the heights of the sun gear, the first planetary gears and the first inner gear ring are matched; the heights of the outer gear ring, the second planetary gears and the second inner gear ring are matched.

[0006] Optionally, a fixing cover is further included, the fixing cover is provided with a through second connecting column, the mounting portion is provided with a first connecting column with an internal thread, the bottom end of the second connecting column abuts against the top end of the first connecting column, and after the bolt penetrates the second connecting column, the bolt is threadedly connected to the first connecting column, so that the fixing cover can be detachably connected to the mounting portion.

[0007] Optionally, a fixing cover is further included, a first installation shaft is protruding from the lower end of the fixing cover, a cavity is provided in the first installation column, and the first installation shaft is inserted into the first installation column through the cavity.

[0008] Optionally, it also includes an output ring rotatably connected to the housing, and a second mounting shaft is protruding from one end of the output ring close to the housing. The second mounting shaft is inserted into the shaft hole of the second planetary gear, and the second planetary gear drives the output ring to revolve around the sun gear through the second mounting shaft.

[0009] Optionally, the output ring is provided with a plurality of balls and a plurality of limiting grooves suitable for accommodating the balls, the balls extend out of the limiting grooves at one end close to the sun gear, and the fixed cover is provided with a sliding groove, and the balls slide in the sliding grooves when the output ring rotates.

[0010] Optionally, there is at least one first planetary gear and at least one second planetary gear.

[0011] Compared with the prior art, the gear reduction box transmission mechanism in the utility model gradually increases the radial torque by setting the first planetary gear and the second planetary gear, thereby reducing the occupation of the axial space while maintaining the transmission reduction function, making the structure flatter and easier to promote and use.

[0012] In addition, the utility model provides a wheel-side reducer, including the gear reduction box transmission mechanism as described above.

[0013] Optionally, the gear reduction box transmission mechanism includes a box body and a sun gear, the wheel-side reducer includes a motor, the motor is detachably connected to the box body, a motor shaft is provided on the motor, and the motor shaft is fixedly connected to the sun gear to drive the sun gear to rotate.

[0014] Compared with the prior art, the wheel-side reducer described in the present invention has the same advantages as the above-mentioned gear reduction box transmission mechanism over the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 An exploded view of a wheel reducer according to an embodiment of the utility model;

[0016] Figure 2 It is a schematic diagram of the combination of the wheel reducer of the embodiment of the utility model;

[0017] Figure 3 A top view of the gear reduction box transmission mechanism of an embodiment of the utility model;

[0018] Figure 4 A cross-sectional view of a wheel reducer according to an embodiment of the utility model;

[0019] Figure 5 This is a structural diagram of a box body according to an embodiment of the utility model;

[0020] Figure 6 A bottom view of a box body according to an embodiment of the utility model;

[0021] Figure 7 It is a schematic diagram of the combination of the ring gear, the sun gear and the first planetary gear in an embodiment of the utility model;

[0022] Figure 8 This is a structural diagram of the output ring of an embodiment of the utility model;

[0023] Fig. 9 This is a structural diagram of a fixed cover according to an embodiment of the utility model;

[0024] Fig.10 A structural diagram of a motor according to an embodiment of the utility model;

[0025] Fig.11 It is a partial structural diagram of a household floor scrubber.

[0026] Description of reference numerals:

[0027] 1. Box body; 11. Annular side wall; 111. Second inner gear ring; 12. Mounting part; 13. First mounting column; 131. Cavity; 14. Limiting frame; 141. Mounting groove; 142. First arc wall; 143. Second arc wall; 144. Third arc wall; 15. First connecting column; 16. Connecting wall; 161. Input port; 2. Sun gear; 3. First planetary gear; 4. Gear ring; 41. First inner gear ring; 42. Outer gear ring; 5. Second planetary gear; 6. Output ring; 61. Second mounting shaft; 62. Limiting groove; 63. Ball; 7. Fixing cover; 71. Edge; 711. Slide groove; 72. First mounting shaft; 73. Second connecting column; 8. Motor; 81. Motor shaft; 82. Connecting seat; 9. Tire. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the description of the present utility model, it is necessary to understand that the orientation or position relationship indicated by the terms "upper" and "lower" etc. is based on the orientation or position relationship when the product is normally used.

[0030] The terms "first" and "second" are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. The drawings of the embodiments of the present utility model are provided with a coordinate system XYZ, wherein the positive direction of the X-axis represents the left, the reverse direction of the X-axis represents the right, the positive direction of the Y-axis represents the front, the reverse direction of the Y-axis represents the back, the positive direction of the Z-axis represents the top, and the reverse direction of the Z-axis represents the bottom.

[0031] The utility model provides a gear reduction box transmission mechanism, combined with Figure 1-11 As shown, it includes a box body 1 with a circular side wall 11, and a sun gear 2 is provided at the axial position of the circular side wall 11. A first planetary gear 3, a second planetary gear 5 and a gear ring 4 coaxially arranged with the sun gear 2 are provided in the box body 1, and a first inner gear ring 41 and an outer gear ring 42 are respectively provided on the inner and outer side walls of the gear ring 4, and the first planetary gear 3 is meshed with the first inner gear ring 41 and the sun gear 2 at the same time, and a second inner gear ring 111 is provided on the inner side of the circular side wall 11, and the second planetary gear 5 is meshed with the second inner gear ring 111 and the outer gear ring 42 at the same time.

[0032] When the sun gear 2 is driven to rotate forward, the sun gear 2 drives the first planetary gear 3 to rotate reversely, the first planetary gear 3 drives the gear ring 4 to rotate reversely through the first inner gear ring 41, and the gear ring 4 drives the second planetary gear 5 to rotate reversely through the outer gear ring 42. Because the second inner gear ring 111 is fixed, the second planetary gear 5 rotates reversely while also revolving around the sun gear 2 in the reverse direction.

[0033] The forward direction is a clockwise direction or a counterclockwise direction, and the reverse direction is a direction opposite to the forward direction.

[0034] like Figure 3 As shown, the first planetary gear 3 is arranged between the sun gear 2 and the first inner ring 41. When the sun gear 2 is rotated, the existence of the first planetary gear 3 increases the radial torque, so that the rotation speed of the first planetary gear 3 is lower than the rotation speed of the sun gear 2.

[0035] The radial torque is further increased by providing the first inner ring gear 41 , so that the rotation speed of the first inner ring gear 41 is lower than the rotation speed of the first planetary gear 3 .

[0036] The outer gear ring 42 and the first inner gear ring 41 have the same rotation speed, and the second planetary gear 5 is arranged between the outer gear ring 42 and the second inner gear. When the outer gear ring 42 rotates, the second planetary gear 5 is also driven to rotate along the second inner gear. This makes the speed of the second planetary gear 5 revolving around the sun gear 2 lower than the rotation speed of the gear ring 4, thereby achieving a gradual deceleration effect.

[0037] By providing the first planetary gear 3 and the second planetary gear 5, the radial torque is gradually increased, thereby reducing the occupation of the axial space while maintaining the transmission deceleration function, making the structure flatter and easier to promote and use.

[0038] There is at least one first planetary gear 3 and at least one second planetary gear 5 .

[0039] like Figure 3 As shown, in this embodiment, there are three first planetary gears 3, which are evenly distributed on the outer periphery of the sun gear 2. Preferably, the axis lines of the three first planetary gears 3 form an equilateral triangle to make the structure more stable. When the sun gear 2 is driven to rotate forward, the three first planetary gears 3 rotate in the opposite direction together, and the three first planetary gears 3 have the same speed. Under the influence of the meshing connection, the three first planetary gears 3 drive the first inner gear ring 41 to rotate in the opposite direction together.

[0040] There are four second planetary gears 5, which are evenly distributed between the outer gear ring 42 and the second inner gear ring 111. Preferably, the axis connecting the four second planetary gears 5 forms a square to make the structure more stable. When the outer gear ring 42 rotates in the opposite direction, because the second inner gear ring 111 is fixed, the second planetary gears 5, driven by the outer gear ring 42, rotate along the circumference of the second inner gear ring 111 while rotating on their own, and the rotation speed and revolution speed of the four second planetary gears 5 are the same.

[0041] The box body 1 is provided with a mounting portion 12, and a plurality of limit frames 14 are provided on the mounting portion 12. A mounting groove 141 is formed between two limit frames 14. A first mounting column 13 is provided at the center of the mounting groove 141. The first mounting column 13 is inserted into the shaft hole of the first planetary gear 3 so that the first planetary gear 3 rotates in the mounting groove 141.

[0042] like Figure 5As shown, in this embodiment, the mounting portion 12 is protruding from the center of the box body 1, the mounting portion 12 is cylindrical, and is coaxially arranged with the box body 1. The limiting frame 14 is a symmetrical figure, and the limiting frame 14 includes a first arc wall 142, a second arc wall 143 and a third arc wall 144. The center of the circle corresponding to the bottom end of the first arc wall 142 is located on the central axis of the mounting portion 12, and the angular arc corresponding to the second arc wall 143 is the same as the angular arc corresponding to the third arc wall 144.

[0043] In this embodiment, there are three limit frames 14, which are evenly distributed on the mounting portion 12. The second arc wall 143 on one limit frame 14 cooperates with the third arc wall 144 on another limit frame 14 to form a mounting groove 141. Therefore, there are also three mounting grooves 141, which are evenly distributed on the mounting portion 12.

[0044] The first mounting column 13 is arranged at the center of the mounting groove 141, and the center of the circle corresponding to the bottom end of the second arc wall 143 and the center of the circle corresponding to the bottom end of the third arc wall 144 are both located on the central axis of the first mounting column 13. The first mounting column 13 limits the first planetary gear 3 so that the first planetary gear 3 can only rotate on its own and will not revolve around the sun gear 2. The mounting groove 141 further limits the rotation range of the first planetary gear 3, so that the transmission structure between the sun gear 2 and the first planetary gear 3 is more compact and more stable.

[0045] The gear ring 4 is arranged around the mounting portion 12 , and the heights of the sun gear 2 , the first planetary gears 3 and the first inner gear ring 41 are matched; the heights of the outer gear ring 42 , the second planetary gears 5 and the second inner gear ring 111 are matched.

[0046] like Figure 5 and 7 As shown, in this embodiment, the thickness of the sun gear 2, the first planetary gear 3 and the first inner ring gear 41 are approximately the same, and are approximately located at the same height; the thickness of the outer ring gear 42, the second planetary gear 5 and the second inner ring gear 111 are approximately the same, and are approximately located at the same height.

[0047] The first inner gear ring 41 is higher than the outer gear ring 42, and there is a height difference between the two. Because the gear reduction box transmission mechanism is usually set on the wheel-side reducer, and the wheel-side reducer is usually connected to the tire 9, and because the tire 9 has a certain thickness, the height difference is set to facilitate the installation of the tire 9. Of course, different height differences can be set according to the thickness of the tire 9. Furthermore, the height difference can also be omitted, so that the sun gear 2, the first planetary gear 3, the gear ring 4, the second planetary gear 5 gear and the second inner gear ring 111 are all at the same height. This arrangement can make the axial space less occupied.

[0048] like Figure 5 and 9 As shown, the gear reduction box transmission mechanism also includes a fixed cover 7, the fixed cover 7 is provided with a through second connecting column 73, the mounting portion 12 is provided with a first connecting column 15 with an internal thread, the bottom end of the second connecting column 73 is abutted against the top end of the first connecting column 15, after the bolt penetrates the second connecting column 73, the bolt is threadedly connected to the first connecting column 15, so that the fixed cover 7 can be detachably connected to the mounting portion 12.

[0049] like Figure 2 and 4 As shown, the fixing cover 7 is arranged above the mounting portion 12, and the second connecting column 73 cooperates with the first connecting column 15, so that the connection between the fixing cover 7 and the mounting portion 12 is more stable. At the same time, the first planetary gear 3 is accommodated between the mounting portion 12 and the fixing cover 7, so that the first planetary gear 3 will not derail, making the transmission structure more stable. The fixing cover 7 and the mounting portion 12 are detachable, so that users can add lubricating oil more conveniently.

[0050] like Figure 3 , 5 As shown in FIG. 9 , preferably, a first mounting shaft 72 is protruding from the lower end of the fixing cover 7 , a cavity 131 is provided in the first mounting column 13 , and the first mounting shaft 72 is inserted into the first mounting column 13 through the cavity 131 .

[0051] The first mounting shaft 72 can further fix the position of the first planetary gear 3, so that the first planetary gear 3 will not derail, making the transmission structure more stable. Furthermore, the first mounting shaft 72 and the first mounting column 13 can be connected together in a tight fit to make the connection between the fixing cover 7 and the mounting portion 12 more stable.

[0052] like Figure 3 and 8As shown, the gear reduction box transmission mechanism also includes an output ring 6, and a second mounting shaft 61 is protruding from one end of the output ring 6 close to the box body 1. The second mounting shaft 61 is inserted into the shaft hole of the second planetary gear 5. The second planetary gear 5 drives the output ring 6 to revolve around the sun gear 2 through the second mounting shaft 61.

[0053] In this embodiment, the output ring 6 is connected to the tire 9, and the tire 9 is fixedly sleeved on the outer circumference of the output ring 6. Driven by the output ring 6, the tire 9 rotates at the same speed and direction as the output ring 6 to output the final rotation speed.

[0054] The general gear reduction transmission mechanism is usually provided with an output shaft, and the output shaft is connected to the shaft hole of the tire 9 to output the final speed. Because the connection area between the output shaft and the tire 9 is small, the connection structure is unstable. The present application provides the output ring 6 and wraps the tire 9 around the outer periphery of the output ring 6, so that the connection area can be larger and the connection structure can be more stable.

[0055] Preferably, the output ring 6 is provided with a plurality of balls 63 and a plurality of limiting grooves 62 suitable for accommodating the balls 63, and the balls 63 extend out of the limiting grooves 62 at one end close to the sun gear 2, and the fixing cover 7 is provided with a sliding groove 711, and when the output ring 6 rotates, the balls 63 slide in the sliding grooves 711.

[0056] like Figure 2 and 4 As shown, the output ring 6 is in the shape of a circular ring, the diameter of the fixing cover 7 is similar to the diameter of the inner ring of the output ring 6, and the upper end of the fixing cover 7 is accommodated in the inner ring of the output ring 6. Fig. 9 As shown, the fixing cover 7 has an edge portion 71 extending circumferentially, and the lower bottom surface of the edge portion 71 is recessed upward to form the sliding groove 711 .

[0057] like Figure 8 As shown, the limiting grooves 62 are evenly distributed along the inner ring of the output ring 6 , one ball 63 is installed in one limiting groove 62 , and an opening is provided at one end of the limiting groove 62 , and the opening is close to the central axis of the output ring 6 .

[0058] When the output ring 6 and the fixed cover 7 are assembled together, the ball 63 is partially located in the slide groove 711. When the output ring 6 rotates, the ball 63 also rotates because the fixed cover 7 is fixed, and at the same time, the ball 63 slides in the slide groove 711. The ball 63 cooperates with the slide groove 711 to make the rotation between the output ring 6 and the fixed cover 7 smoother and reduce jamming.

[0059] Another embodiment of the utility model provides a wheel-side reducer, comprising the gear reduction box transmission mechanism as described above.

[0060] The gear reduction box transmission mechanism includes a box body 1 and a sun gear 2, and the wheel-side reducer includes a motor 8, which is detachably connected to the box body 1. The motor 8 is provided with a motor 8 shaft, and the motor 8 shaft is fixedly connected to the sun gear 2 to drive the sun gear 2 to rotate.

[0061] like Figure 4 and 5 As shown, in this embodiment, the housing 1 is divided into two parts, one part is used to set the gear reduction box transmission mechanism, and the other part is used to connect the motor 8. Figure 6 As shown, there is a connecting wall 16 between the two parts, and an input port 161 is provided on the connecting wall 16. Fig.10 As shown, the motor 8 is provided with a connection seat 82, and the motor 8 shaft is protruded on the connection seat 82. The connection seat 82 is elliptical, and the diameter of the input port 161 is matched with the diameter of the connection seat 82. The connection seat 82 extends from the input port 161 so that the motor 8 shaft is located between the three first planetary gears 3. The motor 8 shaft is inserted into the shaft hole of the sun gear 2, and the sun gear 2 abuts against the connection seat 82.

[0062] The wheel reducer is usually connected to the tire 9 to reduce the rotation speed of the tire 9 to meet the needs of different devices, such as Fig.11 As shown, the wheel reducer can be connected to the tire 9 on the household floor scrubber to slow down the moving speed of the household floor scrubber to adapt to the walking speed of the user. At the same time, it also avoids the situation that the bottom plate is not cleaned properly due to the household floor scrubber moving too fast.

[0063] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A gear reduction box transmission mechanism, characterized in that: The invention comprises a housing (1) with an annular side wall (11), a sun gear (2) being arranged at an axial position of the annular side wall (11), a first planetary gear (3), a second planetary gear (5) and a gear ring (4) coaxially arranged with the sun gear (2) being arranged in the housing (1), a first inner gear ring (41) and an outer gear ring (42) being arranged on the inner and outer side walls of the gear ring (4), the first planetary gear (3) being meshingly connected with the first inner gear ring (41) and the sun gear (2), a second inner gear ring (111) being arranged on the inner side of the annular side wall (11), and the second planetary gear (5) being meshingly connected with the second inner gear ring (111) and the outer gear ring (42) at the same time.

2. The gear reduction box transmission mechanism according to claim 1, characterized in that: The housing (1) is provided with a mounting portion (12) protruding thereon, and a plurality of limit frames (14) are protruding thereon, a mounting groove (141) is formed between two limit frames (14), and a first mounting column (13) is protruding at the center of the mounting groove (141), and the first mounting column (13) is inserted into the shaft hole of the first planetary gear (3) so that the first planetary gear (3) rotates in the mounting groove (141).

3. The gear reduction box transmission mechanism according to claim 2, characterized in that: The gear ring (4) is arranged around the mounting portion (12), and the heights of the sun gear (2), the first planetary gears (3) and the first inner gear ring (41) are matched; the heights of the outer gear ring (42), the second planetary gears (5) and the second inner gear ring (111) are matched.

4. The gear reduction box transmission mechanism according to claim 2, characterized in that: The invention also comprises a fixing cover (7), wherein a second connecting column (73) is provided on the fixing cover (7), and a first connecting column (15) with an internal thread is provided on the mounting portion (12), wherein the bottom end of the second connecting column (73) is in contact with the top end of the first connecting column (15), and after a bolt passes through the second connecting column (73), the bolt is screwed to the first connecting column (15), so that the fixing cover (7) can be detachably connected to the mounting portion (12).

5. The gear reduction box transmission mechanism according to claim 2, characterized in that: It also comprises a fixing cover (7), a first mounting shaft (72) protruding from the lower end of the fixing cover (7), a cavity (131) being provided in the first mounting column (13), and the first mounting shaft (72) being inserted into the first mounting column (13) through the cavity (131).

6. The gear reduction box transmission mechanism according to claim 4, characterized in that: It also comprises an output ring (6) rotatably connected to the housing (1); a second mounting shaft (61) is protrudingly provided at one end of the output ring (6) close to the housing (1); the second mounting shaft (61) is inserted into the shaft hole of the second planetary gear (5); the second planetary gear (5) drives the output ring (6) to revolve around the sun gear (2) via the second mounting shaft (61).

7. The gear reduction box transmission mechanism according to claim 6, characterized in that: The output ring (6) is provided with a plurality of balls (63) and a plurality of limiting grooves (62) suitable for accommodating the balls (63); one end of the balls (63) close to the sun gear (2) extends out of the limiting groove (62); the fixed cover (7) is provided with a sliding groove (711); when the output ring (6) rotates, the balls (63) slide in the sliding groove (711).

8. The gear reduction box transmission mechanism according to any one of claims 1 to 7, characterized in that: There is at least one first planetary gear (3) and at least one second planetary gear (5).

9. A wheel reducer, characterized in that: It comprises a gear reduction box transmission mechanism as described in any one of claims 1-8.

10. The wheel reducer according to claim 9, characterized in that: The gear reduction box transmission mechanism comprises a box body (1) and a sun gear (2), and the wheel-side reducer comprises a motor (8), the motor (8) is detachably connected to the box body (1), and the motor (8) is provided with a motor shaft (81), and the motor shaft (81) is fixedly connected to the sun gear (2) to drive the sun gear (2) to rotate.

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