A right-angle speed reducer

Abstract

This utility model relates to the field of speed reducer technology and discloses a right-angle speed reducer, including a housing. An input shaft, an intermediate shaft, and an output shaft are rotatably arranged inside the housing. The input shaft is connected to a first-stage planetary reduction mechanism. The output end of the first-stage planetary reduction mechanism is connected to a first gear, which is coaxially arranged with the input shaft. The intermediate shaft is parallel to the axis of the input shaft, and a second gear is coaxially fixedly connected to the intermediate shaft. The first gear and the second gear mesh with each other. A bevel gear set is arranged between the intermediate shaft and the output shaft, making the intermediate shaft and the output shaft perpendicular. A second-stage planetary reduction mechanism is also arranged between the output shaft and the output end of the bevel gear set. This utility model adopts a parallel shaft structure, shortening the lateral dimension of the speed reducer and making the overall structure of the speed reducer more compact.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a right-angle speed reducer. Background Technology

[0002] Among the speed reducer family, planetary speed reducers are widely used in servo, stepper, and DC drive systems due to their advantages such as small size, high transmission efficiency, wide reduction range, and high precision. Their main function is to reduce speed, increase torque, and lower the load / motor moment of inertia ratio while ensuring precise transmission. Planetary speed reducers are a versatile industrial product suitable for industries such as hoisting and transportation, engineering machinery, metallurgy, mining, petrochemicals, construction machinery, light industry and textiles, medical devices, instrumentation, automobiles, shipbuilding, weaponry, and aerospace.

[0003] Right-angle reducers can be used to change the direction of power. Existing reducers for changing direction use a single worm gear or gear structure, which cannot transmit high torque. Alternatively, multiple reduction mechanisms can be used to increase torque, but this makes the overall reducer structure less compact. To solve these problems, a new type of right-angle reducer is needed. Utility Model Content

[0004] The purpose of this invention is to provide a right-angle speed reducer that has a compact structure and can transmit high torque.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A right-angle speed reducer includes a housing. An input shaft, an intermediate shaft, and an output shaft are rotatably disposed within the housing. The input shaft is connected to a first-stage planetary speed reducer. The output end of the first-stage planetary speed reducer is connected to a first gear, which is coaxial with the input shaft. The intermediate shaft is parallel to the axis of the input shaft. A second gear is coaxially fixedly connected to the intermediate shaft. The first gear and the second gear mesh with each other. A bevel gear set is disposed between the intermediate shaft and the output shaft, making the intermediate shaft and the output shaft perpendicular. The output end of the bevel gear set is connected to a second-stage planetary speed reducer. The input end of the second-stage planetary speed reducer is connected to the output end of the bevel gear set, and the output end of the second-stage planetary speed reducer is connected to the output shaft.

[0007] As a further feature of this utility model, the first-stage planetary reduction mechanism includes a first-stage sun gear, a first-stage planet gear, a first-stage planet carrier, and a first-stage ring gear, all coaxially arranged with the input shaft. The first-stage sun gear is fixedly connected to the input shaft coaxially, the first-stage ring gear is fixedly connected to the housing, the first-stage planet carrier is rotatably connected to the housing, the first-stage planet gear is rotatably arranged at an eccentric position on the first-stage planet carrier, the first-stage planet gear meshes externally with the first-stage sun gear, the first-stage planet gear meshes internally with the first-stage ring gear, and the first gear is fixedly connected to the first-stage planet carrier coaxially.

[0008] As a further feature of this invention, a primary pin parallel to the input shaft is fixedly provided at the eccentric position of the primary planetary carrier, and the primary planetary gears are coaxially rotatably connected to the primary pin.

[0009] As a further feature of this invention, the bevel gear set includes a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear is coaxially and fixedly connected to the intermediate shaft, and the second bevel gear is connected to the input end of the two-stage planetary reduction mechanism. The second bevel gear is also coaxially arranged with the output shaft.

[0010] As a further feature of this invention, the tooth ratio of the first bevel gear to the second bevel gear is 1:2.

[0011] As a further feature of this invention, the secondary planetary reduction mechanism includes a secondary sun gear, a secondary planet gear, a secondary planet carrier, and a secondary ring gear, all coaxially arranged with the output shaft. The secondary sun gear is coaxially and fixedly connected to the second bevel gear. The secondary ring gear is fixedly connected to the housing. The secondary planet carrier is rotatably connected to the housing. The secondary planet gear is rotatably positioned at an eccentric position on the secondary planet carrier. The secondary planet gear meshes externally with the secondary sun gear and internally with the secondary ring gear. The output shaft is coaxially and fixedly connected to the secondary planet carrier.

[0012] As a further feature of this invention, a secondary pin, parallel to the output shaft, is fixedly provided at the eccentric position of the secondary planetary carrier, and the secondary planetary gears are coaxially rotatably connected to the secondary pin.

[0013] As a further feature of this invention, a skeleton oil seal is provided between the housing and the output shaft. One end of the skeleton oil seal is fixedly connected to the housing, and the other end abuts against the output shaft.

[0014] The beneficial effects of this utility model are:

[0015] This invention uses an input shaft for power input and a bevel gear set for power direction conversion. The output shaft is set at a right angle to the input shaft. The torque is increased by a first-stage planetary reduction mechanism and a second-stage planetary reduction mechanism. In addition, an intermediate shaft is set inside the housing. The intermediate shaft is set parallel to the input shaft. The parallel shaft setting can better utilize the space inside the reducer housing, making the internal structure of the reducer more compact and preventing the reducer housing from extending in different directions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0018] In the diagram, 1. Housing, 2. Input shaft, 3. Intermediate shaft, 4. Output shaft, 5. First-stage planetary reduction mechanism, 51. First-stage sun gear, 52. First-stage planetary gear, 53. First-stage planetary carrier, 54. First-stage ring gear, 61. First gear, 62. Second gear, 7. Bevel gear set, 71. First bevel gear, 72. Second bevel gear, 8. Second-stage planetary reduction mechanism, 81. Second-stage sun gear, 82. Second-stage planetary gear, 83. Second-stage planetary carrier, 84. Second-stage ring gear, 9. Oil seal. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] A right-angle speed reducer, reference Figure 1 It includes a housing 1, an input shaft 2, a first-stage planetary reduction mechanism 5, a gear set, an intermediate shaft 3, a bevel gear set 7, a second-stage planetary reduction mechanism 8, and an output shaft 4, wherein the input shaft 2 and the output shaft 4 are arranged perpendicularly at right angles.

[0021] The input shaft 2 is rotatably connected to the housing 1, and the input shaft 2 is connected to an external power device to rotate and realize power input;

[0022] The primary planetary reduction mechanism 5 includes a primary sun gear 51, primary planet gears 52, a primary planet carrier 53, and a primary ring gear 54, all coaxially arranged with the input shaft 2. The primary sun gear 51 is fixedly connected to the input shaft 2 coaxially. The primary ring gear 54 is fixedly connected to the housing 1. The primary planet carrier 53 is rotatably connected to the housing 1. The primary planet gears 52 are rotatably positioned eccentrically on the primary planet carrier 53. The primary planet gears 52 are externally meshed with the primary sun gear 51 and internally meshed with the primary ring gear 54. When the input shaft 2 rotates, it drives the primary sun gear 51 to rotate. The primary sun gear 51, through external meshing, drives the primary planet gears 52 to rotate on the primary pivot pin. The primary pivot pin drives the primary planet carrier 53 to revolve around the axis of the input shaft 2, and the primary planet carrier 53 outputs power.

[0023] The gear set in this embodiment includes a first gear 61 and a second gear 62, which are used to transmit the power output of the first-stage planetary carrier 53 to the intermediate shaft 3. Specifically, the first gear 61 is a sun gear structure in a planetary gear structure. The first gear 61 is press-fitted into the inner hole of the first-stage planetary carrier 53, and the first gear 61 is coaxially arranged with the input shaft 2. The second gear 62 meshes with the first gear 61 and is coaxially fixed with the intermediate shaft 3. The intermediate shaft 3 is rotatably connected to the housing 1 and is parallel to the input shaft 2. When the input shaft 2 rotates, it drives the first-stage planetary carrier 53 to rotate. The first-stage planetary carrier 53 drives the first gear 61 to rotate. The first gear 61 drives the intermediate shaft 3 to rotate through the second gear 62, thus transmitting the power of the input shaft 2 to the intermediate shaft 3.

[0024] As for the position of the intermediate shaft 3, it can be set in a position that is more conducive to space utilization, based on the internal space of the shell 1, so as to ensure that the internal space is fully utilized and the overall structure is more compact.

[0025] The bevel gear set 7 includes a first bevel gear 71 and a second bevel gear 72 that mesh with each other. The first bevel gear 71 is coaxially and fixedly connected to the intermediate shaft 3, and the second bevel gear 72 is coaxially and fixedly connected to the second-stage sun gear 81 in the second-stage planetary reduction mechanism 8. The axis of the first bevel gear 71 is set perpendicular to the axis of the second bevel gear 72. By setting the bevel gear set 7, the power input direction of the input shaft 2 is adjusted to the vertical direction for power output, thereby realizing the change of power direction.

[0026] In this embodiment, the tooth ratio of the first bevel gear 71 to the second bevel gear 72 is 1:2. By changing the number of teeth of the first bevel gear 71 and the second bevel gear 72, the speed ratio of the reducer is increased, saving one stage of planetary gear reduction, shortening the longitudinal dimension of the reducer, reducing the volume of the reducer, and reducing the cost.

[0027] The secondary planetary reduction mechanism 8 includes a secondary sun gear 81, a secondary planetary gear 82, a secondary planetary carrier 83, and a secondary ring gear 84, all coaxially arranged with the output shaft 4. The secondary sun gear 81 is coaxially and fixedly connected to the second bevel gear 72. The secondary ring gear 84 is fixedly connected to the housing 1. The secondary planetary carrier 83 is rotatably connected to the housing 1. The secondary planetary gear 82 is rotatably positioned at an eccentric position on the secondary planetary carrier 83. The secondary planetary gear 82 meshes externally with the secondary sun gear 81 and internally with the secondary ring gear 84. The output shaft 4 is coaxially and fixedly connected to the secondary planetary carrier 83. The intermediate shaft 3 drives the secondary sun gear 81 to rotate through the first bevel gear 71 and the second bevel gear 72. The secondary sun gear 81 drives the secondary planetary gear 82 to rotate on the secondary pin shaft through external meshing. The secondary pin shaft drives the secondary planetary carrier 83 to revolve around the axis of the secondary sun gear 81. The secondary planetary carrier 83 is coaxially and fixedly connected to the output shaft 4, which outputs power.

[0028] In this embodiment, the secondary planetary carrier 83 and the output shaft 4 are integrally formed into a single component.

[0029] The overall working principle is as follows: When the input shaft 2 rotates, it drives the first-stage sun gear 51 to rotate. The first-stage sun gear 51 drives the first-stage planetary gear 52 to rotate on the first-stage pin shaft through external meshing. The first-stage pin shaft drives the first-stage planetary carrier 53 to revolve around the axis of the input shaft 2. When the first-stage planetary carrier 53 rotates, it drives the first gear 61 to rotate. The first gear 61 drives the intermediate shaft 3 to rotate through the second gear 62. The intermediate shaft 3 drives the first bevel gear 71 to rotate. The first bevel gear 71 drives the second bevel gear 72 to rotate. The second bevel gear 72 drives the second-stage sun gear 81 to rotate. The second-stage sun gear 81 drives the second-stage planetary gear 82 to rotate on the second-stage pin shaft through external meshing. The second-stage pin shaft drives the second-stage planetary carrier 83 to revolve around the axis of the second-stage sun gear 81. The second-stage planetary carrier 83 drives the output shaft 4 to rotate for power output.

[0030] In addition, in this embodiment, a primary planetary carrier 53 is fixedly provided at an eccentric position with a primary pin parallel to the input shaft 2, and the primary planetary carrier 53 is fixedly connected to the primary pin. A secondary planetary carrier 83 is fixedly provided at an eccentric position with a secondary pin parallel to the output shaft 4, and the secondary planetary carrier 83 is fixedly connected to the secondary pin. Through the action of the primary and secondary pins, the planetary gears and the planetary carrier can be installed effectively.

[0031] To ensure the sealing of the reducer, a skeleton oil seal 9 is provided between the housing 1 and the output shaft 4. One end of the skeleton oil seal 9 is fixedly connected to the housing 1, and the other end abuts against the output shaft 4.

[0032] In another embodiment, the housing 1 and the output shaft 4 can be sealed in other ways as long as the above-mentioned technical effects can be achieved.

[0033] Furthermore, the rotating and fixed connection methods of the various components in this embodiment are conventional technical settings in the field and will not be described in detail here.

[0034] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A right angle speed reducer characterized by: The device includes a housing (1), inside which an input shaft (2), an intermediate shaft (3), and an output shaft (4) are rotatably arranged. The input shaft (2) is connected to a first-stage planetary reduction mechanism (5), and the output end of the first-stage planetary reduction mechanism (5) is connected to a first gear (61). The first gear (61) is coaxially arranged with the input shaft (2). The intermediate shaft (3) is parallel to the axis of the input shaft (2). A second gear (62) is coaxially fixedly connected to the intermediate shaft (3). The first gear (61) and the second gear (62) are meshed together. A bevel gear set (7) is arranged between the intermediate shaft (3) and the output shaft (4). The bevel gear set (7) makes the axes of the intermediate shaft (3) and the output shaft (4) perpendicular. The output end of the bevel gear set (7) is connected to a second-stage planetary reduction mechanism (8). The input end of the second-stage planetary reduction mechanism (8) is connected to the output end of the bevel gear set (7), and the output end of the second-stage planetary reduction mechanism (8) is connected to the output shaft (4).

2. A right angle speed reducer as claimed in claim 1, characterized in that: The first-stage planetary reduction mechanism (5) includes a first-stage sun gear (51), a first-stage planetary gear (52), a first-stage planetary carrier (53), and a first-stage ring gear (54) coaxially arranged with the input shaft (2). The first-stage sun gear (51) is coaxially and fixedly connected to the input shaft (2). The first-stage ring gear (54) is fixedly connected to the housing (1). The first-stage planetary carrier (53) is rotatably connected to the housing (1). The first-stage planetary gear (52) is rotatably arranged at an eccentric position on the first-stage planetary carrier (53). The first-stage planetary gear (52) meshes externally with the first-stage sun gear (51). The first-stage planetary gear (52) meshes internally with the first-stage ring gear (54). The first gear (61) is coaxially and fixedly connected with the first-stage planetary carrier (53).

3. A right angle speed reducer as set forth in claim 2, characterized in that: The first-stage planetary carrier (53) is fixedly provided with a first-stage pin shaft parallel to the input shaft (2) at an eccentric position, and the first-stage planetary gear (52) is coaxially rotatably connected to the first-stage pin shaft.

4. The right angle speed reducer of claim 1, wherein: The bevel gear set (7) includes a first bevel gear (71) and a second bevel gear (72) that mesh with each other. The first bevel gear (71) is coaxially fixedly connected to the intermediate shaft (3), and the second bevel gear (72) is connected to the input end of the second-stage planetary reduction mechanism (8). The second bevel gear (72) is coaxially arranged with the output shaft (4).

5. A right angle speed reducer as set forth in claim 4, characterized in that: The ratio of the number of teeth of the first bevel gear (71) to the number of teeth of the second bevel gear (72) is 1:

2.

6. A right angle speed reducer as set forth in claim 4, characterized in that: The secondary planetary reduction mechanism (8) includes a secondary sun gear (81), a secondary planetary gear (82), a secondary planetary carrier (83), and a secondary ring gear (84) coaxially arranged with the output shaft (4). The secondary sun gear (81) is coaxially and fixedly connected to the second bevel gear (72). The secondary ring gear (84) is fixedly connected to the housing (1). The secondary planetary carrier (83) is rotatably connected to the housing (1). The secondary planetary gear (82) is rotatably arranged at the eccentric position of the secondary planetary carrier (83). The secondary planetary gear (82) meshes externally with the secondary sun gear (81). The secondary planetary gear (82) meshes internally with the secondary ring gear (84). The output shaft (4) is coaxially and fixedly connected with the secondary planetary carrier (83).

7. A right angle speed reducer as set forth in claim 6, characterized in that: The secondary planetary carrier (83) is fixedly provided with a secondary pin shaft parallel to the output shaft (4) at an eccentric position, and the secondary planetary gear (82) is coaxially rotatably connected to the secondary pin shaft.

8. A right angle speed reducer as set forth in claim 1, characterized by: A skeleton oil seal (9) is provided between the housing (1) and the output shaft (4). One end of the skeleton oil seal (9) is fixedly connected to the housing (1), and the other end abuts against the output shaft (4).

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