Two-stage walking speed reducer with novel structure

Abstract

The utility model provides a two-stage walking speed reducer with a novel structure, which relates to the technical field of mechanical transmission and comprises a shaft disc, an input shaft, a planet carrier, a second-stage gear ring and a first-stage gear ring, one end of the input shaft is connected with a second-stage sun gear, the other end of the input shaft is rotatably connected with the shaft disc, a cavity is arranged in the planet carrier, the second-stage sun gear is located in the cavity, and the first-stage gear ring is located in the cavity. The upper end of the cavity is connected with a rotatable second-stage planet wheel, the second-stage planet wheel is in external meshing transmission connection with a second-stage sun wheel, the second-stage planet wheel is in internal meshing transmission connection with a second-stage gear ring, the end, close to the shaft disc, of the planet carrier is connected with a first-stage sun wheel, and the upper end of the interior of the shaft disc is provided with a first-stage planet wheel capable of rotating. The first-stage planet gear is in external meshing transmission connection with the first-stage sun gear, the first-stage gear ring is in internal meshing transmission connection with the first-stage planet gear, and the first-stage gear ring and the second-stage gear ring are connected through a connecting piece. According to the device, the first-stage gear ring and the second-stage gear ring can be used as an integral component for simultaneous output, and the transmission advantage and the transmission speed ratio are better.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical drive technical field especially relates to a novel structure two -stage walking speed reducer. BACKGROUND

[0002] Walking speed reducer is a kind of widely used industrial products, can reduce the speed of motor, simultaneously increase output torque, can be used as supporting components in hoisting, excavating, transporting, building and other industries.For example, when being applied on AGV dolly, with the continuous development of industry, the automation degree requirement of AGV dolly is higher and higher, now AGV dolly meets bearing capacity, also requires AGV dolly size smaller and smaller, and the size of speed reducer is also required shorter, simultaneously, AGV dolly also meets the requirements of forward rotation, reverse rotation and accurate speed control.The traditional two-stage walking speed reducer is simple in structure, and the output mode is single, that is, the input shaft inputs, and the primary gear ring outputs, which cannot be used in some transmission systems with special requirements. SUMMARY

[0003] Therefore, to solve the problem of the single output mode of the existing walking speed reducer and the problem that the walking speed reducer cannot be used in some transmission systems with special requirements, an embodiment of the utility model provides a novel structure two-stage walking speed reducer.

[0004] The novel structure two-stage walking speed reducer provided by the embodiment of the utility model comprises an axle disc, an input shaft, a planet carrier, a secondary gear ring and a primary gear ring, one end of the input shaft is connected with a secondary sun gear, the other end of the input shaft is rotatably inserted into one end of the axle disc, the planet carrier is internally provided with a cavity, the secondary sun gear is located in the cavity, a rotatable secondary planetary gear is connected and arranged at the upper end of the cavity, the secondary planetary gear is externally meshed and transmissionally connected with the secondary sun gear, the secondary gear ring is rotatably sleeved on the periphery of the planet carrier and is internally meshed and transmissionally connected with the secondary planetary gear, a primary sun gear is connected to the end of the planet carrier close to the axle disc, and the primary sun gear is rotatably sleeved on the input shaft without being in contact, a rotatable primary planetary gear is arranged at the upper end of the inside of the axle disc, and the primary planetary gear is externally meshed and transmissionally connected with the primary sun gear, the primary gear ring is rotatably sleeved on the end of the axle disc close to the planet carrier and is internally meshed and transmissionally connected with the primary planetary gear, and the primary gear ring and the secondary gear ring are connected through a connecting piece.

[0005] Further, a secondary pin shaft is fixedly arranged at the upper end of the cavity, the axis of the secondary pin shaft is the same as the axis direction of the input shaft, and the secondary planetary gear is rotatably sleeved on the secondary pin shaft through a needle bearing.

[0006] Further, one end of the secondary gear ring close to the shaft disc is detachably fixedly connected with the corresponding end of the primary gear ring through the connecting piece, and the other end is provided with an end cover, and the inner wall of the end cover is rotatably connected with the outer wall of the one end of the planet carrier away from the input shaft through a third single-row deep groove ball bearing.

[0007] Further, one end of the primary sun gear close to the secondary planetary gear is fixedly connected with the planet carrier, and the other end is sleeved on the input shaft without contact, one end of the shaft disc is fixedly connected with the external power source, and the other end is rotatably connected with the outer wall of the corresponding end of the input shaft through a first single-row deep groove ball bearing, and a primary pin shaft is fixedly arranged on the upper end of the inside of the shaft disc, and the primary planetary gear is rotatably sleeved on the primary pin shaft through a needle bearing.

[0008] Further, the inner walls of the two ends of the primary gear ring are rotatably connected with the outer walls of the one end of the shaft disc close to the input shaft through second single-row deep groove ball bearings, respectively.

[0009] Further, the second single-row deep groove ball bearing close to one side of the secondary gear ring is provided with a first bearing cover, and the other second single-row deep groove ball bearing is provided with a TC skeleton oil seal.

[0010] Further, the third single-row deep groove ball bearing is provided with a second bearing cover.

[0011] Further, the connecting piece is a locking screw.

[0012] The beneficial effects brought by the technical scheme provided by the embodiment of the utility model are as follows: first, the double-stage walking speed reducer, the primary gear ring and the secondary gear ring are simultaneously output as a whole component, the speed ratio is the same, the direction is the same, and the double-stage walking speed reducer has more advantages than the traditional walking speed reducer, the secondary gear ring is fixed, and the primary gear ring is output.

[0013] Second, the double-stage walking speed reducer, the input shaft inputs, the primary gear ring and the secondary gear ring are simultaneously output, a special prime speed reduction ratio can be obtained, so that the precise speed control requirement of the AGV trolley is met, and the double-stage walking speed reducer is especially suitable for the steering wheel transmission system of the AGV robot.

[0014] Third, the double-stage walking speed reducer, the secondary gear transmission part, the planet carrier rotates, the primary gear transmission part, the shaft disc is fixed, and the structure is novel and diversified.

[0015] Fourth, the double-stage walking speed reducer has a large speed ratio, a large output torque, and a short axial dimension. DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the novel double-stage walking speed reducer.

[0017] In the figure: 1-axis disc, 2-input shaft, 3-second stage sun gear, 4-second stage planetary gear, 5-second stage pin shaft, 6-second stage ring gear, 7-carrier, 8-first stage sun gear, 9-first stage planetary gear, 10-first stage pin shaft, 11-first stage ring gear, 12-first bearing cover, 13-second bearing cover, 14-end cover, 15-first single row deep groove ball bearing, 16-second single row deep groove ball bearing, 17-third single row deep groove ball bearing, 18-TC skeleton oil seal. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] Please refer to Figure 1 The embodiment of the present application provides a novel structure two-stage walking speed reducer, which comprises an axis disc 1, an input shaft 2, a carrier 7, a second stage ring gear 6 and a first stage ring gear 11.

[0020] In the embodiment, one end of the axis disc 1 is fixed with a power source such as a motor, and the other end of the axis disc 1 is internally provided with the input shaft 2. One end of the input shaft 2 is inserted into the corresponding end of the axis disc 1, and the inner wall of the corresponding end of the axis disc 1 is rotatably fixedly connected with the corresponding end of the input shaft 2 through a plurality of first single row deep groove ball bearings 15. In the embodiment, the number of the first single row deep groove ball bearings 15 is two. The inner ring of each first single row deep groove ball bearing 15 is fixedly connected with the corresponding end of the input shaft 2, and the outer ring is fixedly connected with the corresponding end of the axis disc 1. In this way, the input shaft 2 can rotate in the axis disc 1 under the drive of the power source.

[0021] The carrier 7 is arranged at the end of the input shaft 2 away from the axis disc 1, and the carrier 7 is internally provided with a cavity. The end of the input shaft 2 away from the axis disc 1 extends into the cavity through the carrier 7, and the carrier 7 does not contact the corresponding end of the input shaft 2. The corresponding end of the input shaft 2 is fixedly connected with the second stage sun gear 3. The second stage pin shaft 5 is fixedly arranged at the upper end of the cavity, and the axis direction of the second stage pin shaft 5 is consistent with the axis direction of the input shaft 2. The second stage planetary gear 4 is rotatably arranged on the second stage pin shaft 5. The second stage planetary gear 4 is rotatably arranged on the second stage pin shaft 5 through a needle bearing, and the second stage planetary gear 4 is externally meshingly and drivingly connected with the second stage sun gear 3. In this way, when the input shaft drives the second stage sun gear 3 to rotate, the second stage planetary gear 4 can be driven to rotate.

[0022] Further, the secondary ring gear 6 is sleeved outside the planet carrier 7, and one end of the secondary ring gear 6 is close to the shaft disc 1 and the other end is away from the shaft disc 1, the inner wall of the secondary ring gear 6 is in meshing transmission with the secondary planetary gear 4, and the end of the secondary ring gear 6 away from the shaft disc 1 is provided with an end cover 14, the end cover 14 is detachably fixedly connected with the secondary ring gear 6 through a connecting piece, in this embodiment, the connecting piece is a locking screw, the inner wall of the end cover 14 is rotatably connected with the outer wall of the planet carrier 7 through a third single-row deep groove ball bearing 17, the inner ring of the third single-row deep groove ball bearing 17 is fixedly connected with the outer wall of the planet carrier 7, and the outer ring is fixedly connected with the inner wall of the end cover 14, in this way, when the secondary planetary gear 4 is driven by the secondary sun gear 3, the secondary ring gear 6 can be driven to rotate through the meshing transmission, at the same time, the planet carrier 7 can also be driven to rotate around the corresponding end of the input shaft 2; it should be noted that the third single-row deep groove ball bearing 17 is provided with a second bearing cover 13, the second bearing cover 13 is detachably fixedly connected with the planet carrier 7 through a connecting piece, the second bearing cover 13 is mainly used to prevent the third single-row deep groove ball bearing 17 from moving during work, and this prevention method is a relatively common method at present, so it will not be described in detail.

[0023] The planet carrier 7 is fixedly provided with a primary sun gear 8 at one end close to the input shaft 2, one end of the primary sun gear 8 is fixedly connected with the corresponding end of the planet carrier 7, and the other end is sleeved on the input shaft 2 without contact, when the planet carrier 7 rotates, the primary sun gear 8 can be driven to rotate.

[0024] The shaft disc 1 is fixedly provided with a primary pin shaft 10 on the inner wall of one end close to the input shaft 2, and the axis direction of the primary pin shaft 10 is consistent with the axis direction of the input shaft 2, a primary planetary gear 9 is rotatably sleeved on the primary pin shaft 10, the primary planetary gear 9 is rotatably sleeved on the primary pin shaft 10 through a needle bearing, and the primary planetary gear 9 is in meshing transmission connection with the primary sun gear 8, in this way, when the primary sun gear 8 rotates, the primary planetary gear 9 can be driven to rotate, it should be noted that since the primary pin shaft 10 is fixedly arranged inside the shaft disc 1, therefore, the primary planetary gear 9 can only rotate around the primary pin shaft 10 when rotating.

[0025] The primary toothed ring 11 is sleeved on the outer periphery of the shaft disc 1 near one end of the input shaft 2, the inner wall of the primary toothed ring 11 is rotatably connected with the outer wall of the corresponding end of the shaft disc 1 through the second single-row deep groove ball bearing 16, the inner ring of each second single-row deep groove ball bearing 16 is fixedly connected with the outer wall of the corresponding end of the shaft disc 1, the outer ring is fixedly connected with the inner wall of the primary toothed ring 11, and the inner wall of the primary toothed ring 11 is drivingly connected with the primary planetary gear 9, so that the primary toothed ring 11 can be driven to rotate when the primary planetary gear 9 rotates; it should be noted that the two second single-row deep groove ball bearings 16 are arranged near the shaft disc 1 and the secondary toothed ring 6, the second single-row deep groove ball bearing 16 near one end of the secondary toothed ring 6 is provided with the first bearing cover 12, the first bearing cover 12 is fixedly connected with the shaft disc 1 through the connecting piece, and the other second single-row deep groove ball bearing 16 is provided with the TC skeleton oil seal 18; it should be noted that the bearing cover and the oil seal are common parts in mechanical transmission, and thus will not be described in detail.

[0026] Further, one end of the primary toothed ring 11 is arranged near the shaft disc 1, and the other end is arranged near one end of the secondary toothed ring 6 away from the end cover 14, the corresponding end of the primary toothed ring 11 and the corresponding end of the secondary toothed ring 6 are detachably fixedly connected through the connecting piece, so that the primary toothed ring 11 and the secondary toothed ring 6 can be simultaneously output as a whole.

[0027] Compared with the traditional walking speed reducer, the novel double-stage walking speed reducer can simultaneously output the primary toothed ring and the secondary toothed ring, and has better transmission advantages and transmission speed ratio.

[0028] In the present document, the front, rear, upper, lower and other orientation words are defined according to the positions of the parts in the drawings and the positions of the parts relative to each other, only for the purpose of expressing the clear and convenient technical scheme. It should be understood that the use of the orientation words should not limit the scope of the application.

[0029] In the case of no conflict, the above-mentioned embodiments and features in the embodiments can be combined with each other.

[0030] The above-mentioned is only the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A new structure two-stage walking reduction machine, characterized in that: The application relates to a planetary gear device, which comprises a shaft disc (1), an input shaft (2), a planetary carrier (7), a second-stage ring gear (6) and a first-stage ring gear (11), wherein one end of the input shaft is connected with a second-stage sun gear (3), the other end of the input shaft is rotatably inserted into one end of the shaft disc (1), the planetary carrier (7) is internally provided with a cavity, the second-stage sun gear (3) is located in the cavity, the upper end of the cavity is connected with a rotatable second-stage planetary gear (4), the second-stage planetary gear (4) is in external meshing transmission connection with the second-stage sun gear (3), the second-stage ring gear (6) is rotatably sleeved on the outer periphery of the planetary carrier (7) and is in internal meshing transmission connection with the second-stage planetary gear (4), one end of the planetary carrier (7) close to the shaft disc (1) is connected with a first-stage sun gear (8) and the first-stage sun gear (8) is non-contactingly sleeved on the input shaft (2), the upper end of the shaft disc (1) is internally provided with a first-stage planetary gear (9) capable of rotating alone, the first-stage planetary gear (9) is in external meshing transmission connection with the first-stage sun gear (8), the first-stage ring gear (11) is rotatably sleeved on one end of the shaft disc (1) close to the planetary carrier (7) and is in internal meshing transmission connection with the first-stage planetary gear (9), and the first-stage ring gear (11) and the second-stage ring gear (6) are connected through a connecting piece.

2. A novel structure two-stage walking reduction machine according to claim 1, characterized in that: The upper end of the cavity is fixedly provided with a second-stage pin shaft (5), the axis of the second-stage pin shaft (5) is the same as the axis direction of the input shaft (2), and the second-stage planetary gear (4) is rotatably sleeved on the second-stage pin shaft (5) through a needle bearing.

3. A novel structure two-stage walking reduction machine according to claim 1, characterized in that: The end close to the shaft disc (1) of the second-stage ring gear (6) is detachably fixedly connected with the corresponding end of the first-stage ring gear (11) through the connecting piece, the other end of the second-stage ring gear (6) is provided with an end cover (14), and the inner wall of the end cover (14) is rotatably connected with the outer wall of one end of the planetary carrier (7) away from the input shaft (2) through a third single-row deep groove ball bearing (17).

4. The novel structure two-stage walking reduction machine according to claim 1, characterized in that: One end of the first-stage sun gear (8) close to the second-stage planetary gear (4) is fixedly connected with the planetary carrier (7), the other end of the first-stage sun gear (8) is non-contactingly sleeved on the input shaft (2), one end of the shaft disc (1) is fixedly connected with an external power source, and the inner wall of the other end of the shaft disc (1) is rotatably connected with the outer wall of the corresponding end of the input shaft (2) through a first single-row deep groove ball bearing (15).

5. A novel structure two-stage walking reduction machine according to claim 1, characterized in that: The inner walls of the two ends of the first-stage ring gear (11) are rotatably connected with the outer walls of one end of the shaft disc (1) close to the input shaft (2) through second single-row deep groove ball bearings (16) respectively.

6. A novel structure two-stage walking reduction machine according to claim 5, characterized in that: The second single-row deep groove ball bearings (16) close to one side of the second-stage ring gear (6) are provided with first bearing covers (12), and the other second single-row deep groove ball bearings (16) are provided with oil seals (18).

7. A novel structure two-stage walking reduction machine according to claim 3, characterized in that: The third single-row deep groove ball bearing (17) is provided with a second bearing cover (13).

8. A novel structure two-stage walking reduction machine according to claim 3, characterized in that: The connecting piece is a locking screw.

9. A new structure two-stage walking reduction machine according to claim 1, characterized in that: The upper end of the inner part of the shaft disc (1) is fixedly provided with a first-stage pin shaft (10), and the first-stage planetary gear (9) is rotatably sleeved on the first-stage pin shaft (10) through a needle bearing.

10. The novel structure two-stage walking reduction machine according to claim 6, characterized in that: The oil seal (18) is a TC skeleton oil seal.

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