Double-input planetary reducer convenient for hand-cranking debugging
By introducing a dual-input method of hand-cranked drive and motor drive into the planetary reducer, and utilizing the worm gear structure to achieve fine adjustment of the output shaft, the problem of long debugging time in traditional planetary reducers is solved, thereby improving debugging efficiency and production progress.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI KEFENG TRANSMISSION EQUIP CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-04-24
AI Technical Summary
Traditional planetary gear reducers suffer from inaccurate output position during commissioning, resulting in lengthy commissioning times and impacting production schedules.
Design a dual-input planetary reducer that is easy to adjust by hand. Combining hand-crank drive and motor drive, the output shaft is fine-tuned through a worm gear structure, simplifying the adjustment process.
It improves the efficiency of equipment installation and commissioning, saves time, and ensures production progress.
Smart Images
Figure CN224162042U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of speed reducer technology, and more specifically, to a dual-input planetary speed reducer that is easy to adjust by hand. Background Technology
[0002] Planetary gear reducers are commonly used transmission devices widely applied in numerous fields. They consist of an internal gear ring, gearbox housing, and sun gear. Depending on the specific requirements of transmission smoothness, accuracy, and load distribution uniformity, planetary precision gear reducers can efficiently and precisely achieve speed reduction and torque output, providing powerful and stable power support for various mechanical equipment. During the commissioning of a planetary gear reducer, precise calibration of its output speed and torque is necessary to ensure a perfect match with the overall operational needs of the equipment. For example, in the field of CNC machine tools, inaccurate output from the planetary gear reducer will directly lead to dimensional deviations in the machined parts, resulting in significant economic losses.
[0003] If the output position of a traditional planetary gearbox is inaccurate during commissioning, the only solution is to repeatedly modify the program by the motor. This commissioning process is time-consuming, requires downtime, and can easily increase the overall project cycle and result in poor performance. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide a dual-input planetary reducer that is easy to adjust by hand, with two operating modes: hand-cranked and motor-driven. During adjustment, the output shaft position can be finely adjusted by hand-cranking, which can effectively improve the efficiency of equipment installation and adjustment and effectively ensure production progress.
[0005] To achieve the above objectives, this utility model provides a dual-input planetary reducer that is easy to adjust by hand, including a rear flange, an input shaft rotatably mounted inside the rear flange, a front flange fixedly mounted on one side of the rear flange along its length, an output shaft rotatably mounted inside the front flange, a planetary reduction structure and a worm gear structure installed inside the front flange.
[0006] The planetary reduction structure includes a sun gear mounted on the input shaft, a plurality of planet gears rotatably mounted on the output shaft and meshing with the sun gear, and an internal gear ring located inside the front flange and meshing with the planet gears. The outer wall of the internal gear ring and the inner wall of the front flange are in clearance fit.
[0007] The worm gear structure includes a worm gear ring rotatably mounted on the outer periphery of the output shaft and fixedly connected to the internal gear ring, a worm shaft rotatably mounted inside the front flange and adapted to the worm gear ring, and a hand crank for driving the worm shaft to rotate. The worm gear ring and the internal gear ring are provided with a matching positioning stop structure on their opposite sides. Several first screws threadedly connected to the internal gear ring are horizontally inserted on the side of the worm gear ring away from the internal gear ring.
[0008] Furthermore, a drive component is installed on the side of the rear flange away from the front flange, and a connecting screw that is threadedly connected to the rear flange is horizontally inserted on the side of the drive component away from the rear flange.
[0009] Furthermore, a positioning pin is rotatably mounted on the inner side of the planetary gear, and a positioning hole is provided on the side of the output shaft near the input shaft, and the size of the positioning hole is adapted to the outer wall size of the positioning pin.
[0010] Furthermore, a pin is fixedly connected to the side of the sun gear near the input shaft, and a mounting hole adapted to the outer wall of the pin is provided on the side of the input shaft near the output shaft.
[0011] Furthermore, the front flange has a horizontally formed rotating hole located directly above the worm gear ring in the width direction, and the inner wall dimension of the rotating hole is larger than the outer wall dimension of the worm shaft. A positioning bearing is installed between the outer wall of the worm shaft and the inner wall of the rotating hole.
[0012] Furthermore, a first pressure plate and a second pressure plate are respectively installed on both sides of the front flange in the width direction. The second pressure plate has a through hole, and the size of the through hole is larger than the outer wall size of the worm shaft. One end of the worm shaft passes horizontally through the second pressure plate.
[0013] Furthermore, this dual-input planetary reducer, which is easy to adjust by hand, also includes:
[0014] The bearing assembly includes a first bearing mounted between the input shaft and the rear flange, a second bearing mounted between the internal gear ring and the output shaft, a third bearing mounted between the worm gear ring and the output shaft, and a fourth bearing mounted between the front flange and the output shaft.
[0015] Furthermore, this dual-input planetary reducer, which is easy to adjust by hand, also includes:
[0016] The limiting assembly includes a first retaining ring mounted on the inner wall of the rear flange and used to limit the movement of the first bearing away from the output shaft, a second retaining ring mounted on the outer periphery of the input shaft and used to limit the movement of the first bearing towards the output shaft, a third retaining ring mounted on the inner wall of the internal gear ring and used to limit the movement of the second bearing towards the input shaft, and a fourth retaining ring mounted on the outer periphery of the output shaft and used to limit the movement of the fourth bearing away from the input shaft.
[0017] Furthermore, a plurality of second screws, which are threadedly connected to the front flange, are horizontally inserted on the side of the rear flange away from the front flange.
[0018] Furthermore, the rear flange includes a first shaft segment, a second shaft segment, a third shaft segment, and a fourth shaft segment connected coaxially in sequence. The first shaft segment has a threaded groove on the side away from the front flange that is adapted to the thread of the connecting screw. The second shaft segment has a through hole on the side away from the front flange that is adapted to the size of the second screw. The outer wall size of the third shaft segment is adapted to the inner wall size of the front flange. The outer wall size of the fourth shaft segment is adapted to the inner wall size of the internal gear ring.
[0019] Compared with the prior art, this utility model has the following advantages and effects:
[0020] The dual-input planetary reducer of this invention, which is easy to adjust by hand, can be disassembled and maintained by separating the rear flange and the front flange. It is flexible and easy to use. After the planetary reducer structure is installed, the output shaft can be driven by the worm gear structure. This allows for fine adjustment of the circumferential position of the output shaft by hand when connecting it to other equipment, thereby effectively improving the efficiency of equipment installation and debugging, saving more time, and ensuring the working efficiency of the reducer. Attached Figure Description
[0021] Figure 1 This is a three-dimensional structural diagram of a dual-input planetary reducer that is easy to manually adjust in an embodiment of this utility model;
[0022] Figure 2 This is a schematic diagram of the main cross-sectional structure of a dual-input planetary reducer that is easy to manually adjust in an embodiment of this utility model;
[0023] Figure 3 This is a side view cross-sectional structural diagram of the worm gear of a dual-input planetary reducer that is easy to manually adjust in an embodiment of this utility model;
[0024] Figure 4 This is a schematic diagram of the connection structure between the front flange and the rear flange of the dual-input planetary reducer, which is easy to manually adjust, in an embodiment of this utility model.
[0025] Figure 5 This is a schematic diagram of the connection structure between the internal gear ring and the worm gear ring of the dual-input planetary reducer, which is easy to adjust by hand, in an embodiment of this utility model.
[0026] Figure 6 This is a three-dimensional structural diagram of the output shaft of a dual-input planetary reducer that is easy to manually adjust in this embodiment of the present invention.
[0027] Explanation of reference numerals in the attached figures:
[0028] 1-Rear flange; 2-Input shaft; 3-Internal gear ring; 4-Front flange; 5-Planet gear; 6-Worm shaft; 7-Worm gear ring; 8-Sun gear; 9-Output shaft; 10-First pressure plate; 11-Second pressure plate; 12-Hand crank handle; 13-Drive component; 14-Positioning pin; 15-First screw; 16-Second screw; 17-Pin; 18-Connecting screw. Detailed Implementation
[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] Please see Figure 1-6 As shown, this utility model embodiment provides a dual-input planetary reducer that is easy to adjust by hand, including a rear flange 1, an input shaft 2, a front flange 4, an output shaft 9, a planetary reduction structure, and a worm gear structure.
[0032] The input shaft 2 is rotatably mounted inside the rear flange 1, the front flange 4 is fixedly mounted on one side of the rear flange 1 along its length, and the output shaft 9 is rotatably mounted inside the front flange 4. The planetary reduction structure and the worm gear structure are both installed inside the front flange 4. Before the planetary reduction structure is adjusted, the output shaft 9 can be driven to rotate by the worm gear structure, thereby adjusting the circumferential position of the output shaft 9.
[0033] The planetary reduction gear structure includes a sun gear 8, planet gears 5, and an internal gear ring 3, wherein:
[0034] The sun gear 8 is mounted on the input shaft 2, and the planet gear 5 is rotatably mounted on the output shaft 9 and meshes with the sun gear 8. The internal gear ring 3 is located inside the front flange 4 and meshes with the planet gear 5. The outer wall of the internal gear ring 3 and the inner wall of the front flange 4 are clearance fit. In use, the rotation of the input shaft 2 can drive the sun gear 8 to rotate, so that the sun gear 8 can drive the planet gear 5 to rotate. With the meshing of the planet gear 5 and the internal gear ring 3, the planet gear 5 can also revolve around the axis of the sun gear 8. During this process, the planet gear 5 can drive the output shaft 9 to rotate, thereby realizing the operation of the planetary reduction structure.
[0035] The worm gear structure includes a worm gear ring 7, a worm shaft 6, and a hand crank 12, wherein:
[0036] The worm gear ring 7 is rotatably mounted on the outer circumference of the output shaft 9 and fixedly connected to the internal gear ring 3. The worm shaft 6 is rotatably mounted inside the front flange 4 and adapted to the worm gear ring 7. The hand crank 12 is fixed to one end of the worm shaft 6 and is used to drive the worm shaft 6 to rotate. The worm gear ring 7 and the internal gear ring 3 are provided with a matching positioning stop structure on the opposite side. Several first screws 15 that are threaded to the internal gear ring 3 are horizontally inserted on the side of the worm gear ring 7 away from the internal gear ring 3. In use, the worm shaft 6 can be rotated by the hand crank 12, thereby driving the worm gear ring 7 to rotate, so as to drive the internal gear ring 3 to rotate in conjunction with the first screws 15, thus realizing the hand crank drive of the output shaft 9.
[0037] Please see Figure 1-2 As shown, a drive component 13 is installed on the side of the rear flange 1 away from the front flange 4. A connecting screw 18, which is threaded to the rear flange 1, is horizontally inserted on the side of the drive component 13 away from the rear flange 1. This allows the drive component 13 to be installed on the rear flange 1 using the connecting screw 18, so that the drive component 13 can be connected to the input shaft 2, thereby causing the input shaft 2 to rotate as the drive component 13 operates.
[0038] Please see Figure 2 and Figure 6 As shown, a positioning pin 14 is rotatably mounted inside the planetary gear 5, and a positioning hole is provided on the side of the output shaft 9 near the input shaft 2. The size of the positioning hole is adapted to the outer wall size of the positioning pin 14. This facilitates the installation of the positioning pin 14 inside the output shaft 9 through the positioning hole, so that after the positioning pin 14 passes through the planetary gear 5, the planetary gear 5 can rotate around the positioning pin 14, thereby realizing the rotatable installation of the planetary gear 5 on the output shaft 9.
[0039] As a preferred embodiment of the above solution, a needle roller bearing can be provided between the inner wall of the planetary gear 5 and the outer wall of the locating pin 14, so as to realize the rotational connection of the locating pin 14 in the planetary gear 5 by using the needle roller bearing, and the provided needle roller bearing can reduce friction and wear while efficiently transmitting radial load.
[0040] Please see Figure 2 and Figure 6 As shown, a pin 17 is fixedly connected to the side of the sun gear 8 near the input shaft 2. The side of the input shaft 2 near the output shaft 9 has a mounting hole that matches the outer wall of the pin 17. This allows the pin 17 to be inserted into the input shaft 2 using the mounting hole. The pin 17 is a rod-shaped structure with a polygonal outer wall, which facilitates the transmission of torque through the interlocking action between the pin 17 and the mounting hole, thereby causing the input shaft 2 to drive the sun gear 8 to rotate.
[0041] Please see Figure 1-3 As shown, a rotating hole is horizontally opened in the width direction of the front flange 4, located directly above the worm gear ring 7. The inner wall dimension of the rotating hole is larger than the outer wall dimension of the worm shaft 6. A positioning bearing is installed between the outer wall of the worm shaft 6 and the inner wall of the rotating hole. This allows the worm shaft 6 to be placed in the front flange 4 using the rotating hole, and the worm shaft 6 to be fixed to the front flange 4 using the positioning bearing, thereby realizing the rotatable installation of the worm shaft 6 in the front flange 4.
[0042] Please see Figure 1-4 As shown, a first pressure plate 10 and a second pressure plate 11 are respectively installed on both sides of the front flange 4 in the width direction. The first pressure plate 10 and the second pressure plate 11 are located at both ends of the rotation hole. The second pressure plate 11 has a through hole, and the size of the through hole is larger than the outer wall size of the worm shaft 6. The worm shaft 6 passes horizontally through the provided through hole through the second pressure plate 11. This facilitates the connection between the part of the worm shaft 6 passing through the second pressure plate 11 and the hand crank handle 12, so that the hand crank handle 12 drives the worm shaft 6 to rotate. The first pressure plate 10 and the second pressure plate 11 can restrict the outward movement of the positioning bearing, so as to prevent the positioning bearing from falling off and keep the positioning bearing stable in the installation of the worm shaft 6.
[0043] As a preferred embodiment of the above scheme, stop sills are provided on both sides of the worm shaft 6 and the inner wall of the rotating hole to abut against the opposite side of the two positioning bearings, effectively restricting the movement of the positioning bearings toward the middle of the worm shaft 6. The positioning bearings can be stably installed by the combination of the first pressure plate 10 and the second pressure plate 11 limiting the positioning bearings.
[0044] Please see Figure 2 As shown, this dual-input planetary reducer, which is easy to adjust by hand, also includes a bearing assembly, wherein:
[0045] The bearing assembly includes a first bearing installed between the input shaft 2 and the rear flange 1, a second bearing installed between the internal gear ring 3 and the output shaft 9, a third bearing installed between the worm gear ring 7 and the output shaft 9, and a fourth bearing installed between the front flange 4 and the output shaft 9.
[0046] As a further description of the above scheme, the outer wall of the input shaft 2 is provided with a first limiting stop that restricts the first bearing from moving away from the output shaft 9, and the inner wall of the rear flange 1 is provided with a second limiting stop that restricts the first bearing from moving closer to the output shaft 9. The setting of the first limiting stop makes it easy to fit the first bearing on the input shaft 2, and the first limiting stop can limit the installation position of the first bearing on the input shaft 2, while the setting of the second limiting stop makes it easy to install the first bearing in the rear flange 1, and also serves to limit the installation position of the first bearing on the rear flange 1.
[0047] The outer wall of the output shaft 9 and the inner wall of the internal gear ring 3 are respectively provided with a third limiting stop and a fourth limiting stop to restrict the movement of the second bearing away from the input shaft 2. The third limiting stop makes it easy to fit the output shaft 9, and the fourth limiting stop makes it easy to install the second bearing inside the internal gear ring 3. The third and fourth limiting stops can also help to confirm the installation position of the second bearing.
[0048] The outer wall of the output shaft 9 is provided with a fifth limiting stop for restricting the movement of the third bearing toward the side closer to the input shaft 2, and the inner wall of the worm gear ring 7 is provided with a sixth limiting stop for restricting the movement of the third bearing away from the input shaft 2. The setting of the fifth limiting stop makes it easy to fit the third bearing on the output shaft 9 and to confirm the installation position of the third bearing on the output shaft 9. The setting of the sixth limiting stop makes it easy to install the third bearing inside the worm gear ring 7 and to confirm the installation position of the third bearing inside the worm gear ring 7.
[0049] The outer wall of the output shaft 9 is provided with a seventh limiting stop to restrict the movement of the fourth bearing toward the side closer to the input shaft 2, and the inner side of the front flange 4 is provided with an eighth limiting stop to restrict the movement of the fourth bearing toward the side closer to the input shaft 2. The setting of the seventh limiting stop makes it easy to fit the fourth bearing on the output shaft 9 and to confirm the installation position of the fourth bearing on the output shaft 9. The setting of the eighth limiting stop makes it easy to install the fourth bearing in the front flange 4 and to confirm the installation position of the third bearing on the front flange 4.
[0050] As a preferred option of the above scheme, the first bearing, the second bearing, the third bearing and the fourth bearing are all deep groove ball bearings, which can effectively ensure the coaxiality of the rear flange 1, the input shaft 2, the internal gear ring 3, the front flange 4, the worm gear ring 7 and the output shaft 9. Moreover, their structure is simple and easy to manufacture, which can reduce costs and facilitate maintenance and replacement.
[0051] Please see Figure 2 As shown, this dual-input planetary reducer, which is easy to adjust by hand, also includes a limit assembly, wherein:
[0052] The bearing assembly includes a first retaining ring mounted on the inner wall of the rear flange 1 to restrict the movement of the first bearing away from the output shaft 9, a second retaining ring mounted on the outer periphery of the input shaft 2 to restrict the movement of the first bearing towards the output shaft 9, a third retaining ring mounted on the inner wall of the internal gear ring 3 to restrict the movement of the second bearing towards the input shaft 2, and a fourth retaining ring mounted on the outer periphery of the output shaft 9 to restrict the movement of the fourth bearing away from the input shaft 2.
[0053] As a further description of the above scheme, the first retaining ring can cooperate with the second limiting stop to restrict the lateral movement of the first bearing on the rear flange 1, and the second retaining ring can cooperate with the first limiting stop to restrict the lateral movement of the first bearing on the input shaft 2; the third retaining ring can cooperate with the fourth limiting stop to restrict the lateral movement of the second bearing within the internal gear ring 3; and the fourth retaining ring can cooperate with the seventh limiting stop to restrict the lateral movement of the fourth bearing on the output shaft 9.
[0054] Please see Figure 2 and Figure 4 As shown, several second screws 16 are horizontally threaded through the side of the rear flange 1 away from the front flange 4, which are connected to the front flange 4. This allows the rear flange 1 and the front flange 4 to be securely installed using the second screws 16, and makes it easy to disassemble and assemble the rear flange 1 and the front flange 4, so as to facilitate the inspection and maintenance of the internal structure of the reducer by separating the rear flange 1 and the front flange 4.
[0055] Please see Figure 2 As shown, the rear flange 1 includes a first shaft segment, a second shaft segment, a third shaft segment, and a fourth shaft segment connected coaxially in sequence. The first shaft segment has a threaded groove on the side away from the front flange 4 that is adapted to the thread of the connecting screw 18, so that the connecting screw 18 can be connected to the rear flange 1 by using the threaded groove on the first shaft segment. The second shaft segment has a through hole on the side away from the front flange 4 that is adapted to the size of the second screw 16, so that the second screw 16 can pass through the rear flange 1 by using the through hole on the second shaft segment.
[0056] The outer wall dimensions of the third shaft section are adapted to the inner wall dimensions of the front flange 4, which facilitates ensuring the concentricity of the rear flange 1 and the front flange 4 after the third shaft section of the rear flange 1 is inserted into the front flange 4; the outer wall dimensions of the fourth shaft section are adapted to the inner wall dimensions of the internal gear ring 3, which facilitates restricting the lateral movement of the internal gear ring 3 by using the side wall of the rear flange 1 after the rear flange 1 and the front flange 4, while maintaining the concentricity of the internal gear ring 3 and the rear flange 1 by using the dimensional matching between the fourth shaft section of the rear flange 1 and the internal gear ring 3.
[0057] It should be noted that, as a preferred embodiment of the above solution, the first screw 15, the second screw 16, and the connecting screw 18 provided in this application are all hexagon socket head cap screws, so that the first screw 15 and the second screw 16 can be respectively fitted into the worm gear ring 7 and the rear flange 1, so that the end faces of the worm gear ring 7 and the rear flange 1 with the screw structure can be kept flat, thereby ensuring the fit between the worm gear ring 7 and the front flange 4, and between the rear flange 1 and the drive component 13.
[0058] The working process of the above-mentioned dual-input planetary reducer, which is easy to adjust by hand, is as follows:
[0059] When installing this dual-input planetary reducer that is easy to adjust by hand, firstly, the planetary gears 5 in the planetary reduction structure are installed onto the output shaft 9 using the positioning pin 14. Then, the sun gear 8 is pressed into the output shaft 9, so that the sun gear 8 meshes with the planetary gears 5. Next, the third bearing is installed into the predetermined position on the output shaft 9, and the worm gear ring 7 is installed onto the third bearing by heat fitting, thereby realizing the rotational installation of the worm gear ring 7 and the output shaft 9.
[0060] The worm gear ring 7 is connected to the internal gear ring 3 by the first screw 15. The second bearing is press-fitted to the position between the internal gear ring 3 and the output shaft 9. The worm gear ring 7, the internal gear ring 3 and the output shaft 9 are then placed in the front flange 4 as a whole. At the same time, the fourth bearing is installed between the output shaft 9 and the front flange 4. Then, the rear flange 1 is fixed to the front flange 4 by the second screw 16.
[0061] Next, the worm shaft 6 is inserted into the front flange 4 using the rotating hole provided in the front flange 4, and the positioning bearing provided with the first pressure plate 10 and the second pressure plate 11 after installation completes the installation and fixation of the worm shaft 6, so that the worm shaft 6 can drive the worm wheel ring 7 to rotate; then the input shaft 2 is pressed into the rear flange 1 through the provided first bearing, and the pin 17 on the sun gear 8 is engaged into the input shaft 2, at which point the assembly of the reducer is completed;
[0062] In use, the drive component 13 needs to be installed on the rear flange 1 by connecting screw 18, so that the drive shaft of the drive component 13 is connected to the input shaft 2. When the drive component 13 is running, the drive shaft of the drive component 13 drives the input shaft 2 to rotate, the input shaft 2 drives the sun gear 8 to rotate, the sun gear 8 drives the planet gear 5, and the planet gear 5 can rotate around the sun gear 8 with the cooperation of the internal gear ring 3, so as to use the rotation of the planet gear 5 around the sun gear 8 to drive the output shaft 9 to rotate.
[0063] Before the drive unit 13 is turned, if the output shaft 9 is to be connected to other equipment, the worm shaft 6 needs to be rotated by operating the hand crank 12. This allows the worm gear ring 7 to rotate the internal gear ring 3 using the transmission action of the worm gear structure. The rotation of the internal gear ring 3 then drives the planet gear 5 to rotate, and the output shaft 9 rotates when the planet gear 5 rotates around the sun gear 8. This allows for manual adjustment of the circumferential position of the output shaft 9.
[0064] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.
Claims
1. A dual-input planetary reducer that is easy to adjust by hand, characterized in that, Includes a rear flange (1), an input shaft (2) rotatably mounted inside the rear flange (1), a front flange (4) fixedly mounted on one side of the rear flange (1) along its length, an output shaft (9) rotatably mounted inside the front flange (4), and a planetary reduction structure and a worm gear structure installed inside the front flange (4). The planetary reduction structure includes a sun gear (8) mounted on the input shaft (2), a plurality of planet gears (5) rotatably mounted on the output shaft (9) and meshing with the sun gear (8), and an internal gear ring (3) located inside the front flange (4) and meshing with the planet gears (5). The outer wall of the internal gear ring (3) and the inner wall of the front flange (4) are in clearance fit. The worm gear structure includes a worm ring (7) rotatably mounted on the outer periphery of the output shaft (9) and fixedly connected to the internal gear ring (3), a worm shaft (6) rotatably mounted in the front flange (4) and adapted to the worm ring (7), and a hand crank (12) for driving the worm shaft (6) to rotate. The worm ring (7) and the internal gear ring (3) are provided with a matching positioning stop structure on the opposite side. Several first screws (15) threaded to the internal gear ring (3) are horizontally inserted on the side of the worm ring (7) away from the internal gear ring (3).
2. The dual-input planetary reducer that is easy to adjust by hand according to claim 1, characterized in that, A drive unit (13) is installed on the side of the rear flange (1) away from the front flange (4), and a connecting screw (18) that is threadedly connected to the rear flange (1) is horizontally inserted on the side of the drive unit (13) away from the rear flange (1).
3. The dual-input planetary reducer that is easy to adjust by hand according to claim 1, characterized in that, The planetary gear (5) is rotatably mounted with a positioning pin (14), and the output shaft (9) has a positioning hole on the side near the input shaft (2), and the size of the positioning hole is adapted to the outer wall size of the positioning pin (14).
4. The dual-input planetary reducer that is easy to adjust by hand according to claim 1, characterized in that, The sun gear (8) is fixedly connected to a pin (17) on the side near the input shaft (2), and the input shaft (2) is provided with a mounting hole that matches the outer wall of the pin (17) on the side near the output shaft (9).
5. The dual-input planetary reducer that is easy to adjust by hand according to claim 1, characterized in that, The front flange (4) has a horizontally opened rotating hole located directly above the worm gear ring (7) in the width direction, and the inner wall size of the rotating hole is larger than the outer wall size of the worm shaft (6). A positioning bearing is installed between the outer wall of the worm shaft (6) and the inner wall of the rotating hole.
6. The dual-input planetary reducer that is easy to adjust by hand according to claim 5, characterized in that, The front flange (4) has a first pressure plate (10) and a second pressure plate (11) installed on both sides in the width direction. The second pressure plate (11) has a through hole, and the size of the through hole is larger than the outer wall size of the worm shaft (6). One end of the worm shaft (6) passes horizontally through the second pressure plate (11).
7. The dual-input planetary reducer that is easy to adjust by hand according to claim 1, characterized in that, Also includes: The bearing assembly includes a first bearing installed between the input shaft (2) and the rear flange (1), a second bearing installed between the internal gear ring (3) and the output shaft (9), a third bearing installed between the worm gear ring (7) and the output shaft (9), and a fourth bearing installed between the front flange (4) and the output shaft (9).
8. The dual-input planetary reducer that is easy to adjust by hand according to claim 7, characterized in that, Also includes: The limiting assembly includes a first retaining ring installed on the inner wall of the rear flange (1) and used to limit the movement of the first bearing away from the output shaft (9), a second retaining ring installed on the outer periphery of the input shaft (2) and used to limit the movement of the first bearing towards the output shaft (9), a third retaining ring installed on the inner wall of the internal gear ring (3) and used to limit the movement of the second bearing towards the input shaft (2), and a fourth retaining ring installed on the outer periphery of the output shaft (9) and used to limit the movement of the fourth bearing away from the input shaft (2).
9. The dual-input planetary reducer that is easy to adjust by hand according to claim 2, characterized in that, A plurality of second screws (16) threadedly connected to the front flange (4) are horizontally inserted on the side of the rear flange (1) away from the front flange (4).
10. The dual-input planetary reducer that is easy to adjust by hand according to claim 9, characterized in that, The rear flange (1) includes a first shaft segment, a second shaft segment, a third shaft segment and a fourth shaft segment connected coaxially in sequence. The first shaft segment has a threaded groove on the side away from the front flange (4) that is adapted to the thread of the connecting screw (18). The second shaft segment has a through hole on the side away from the front flange (4) that is adapted to the size of the second screw (16). The outer wall size of the third shaft segment is adapted to the inner wall size of the front flange (4). The outer wall size of the fourth shaft segment is adapted to the inner wall size of the internal gear ring (3).