CN204692475U - A kind of double speed decelerator - Google Patents

Abstract

The utility model discloses a variable-speed two-speed reducer, which mainly includes a reducer bracket, a planetary gear assembly and a clutch assembly, and the planetary gear assembly includes a rotating shaft, an outer ring gear, a first-stage sun gear, a first-stage planetary wheel, The secondary planetary gear and the secondary planetary carrier assembly, the primary sun gear is installed on the rotating shaft, the primary planetary wheel and the secondary planetary gear are installed on the secondary planetary carrier assembly, and the clutch assembly is connected to the rotating shaft The shaft is connected and can drive the rotating shaft to move axially. The rotating shaft is provided with meshing teeth for meshing with the secondary planetary gear. The secondary planetary wheel meshes with the rotating shaft through the meshing teeth. The secondary planetary wheel and The outer ring gear is engaged, and the axial movement of the rotating shaft can make the first-stage planetary gear mesh with the first-stage sun gear or separate the first-stage planetary gear from the first-stage sun gear.

Description

A two-speed reducer

technical field

The utility model relates to the field of reducers, in particular to a two-speed reducer.

Background technique

The reducer plays the role of matching speed and transmitting torque between the prime mover and the working machine or the actuator, and is widely used in modern machinery. The existing speed reducer driven by a two-stage or three-stage planetary gear assembly cannot change the speed and cannot meet diverse market demands.

Contents of the invention

The technical problem to be solved by the utility model is to provide a variable-speed two-speed reducer.

In order to solve the above-mentioned existing technical problems, the utility model adopts the following scheme: a two-speed reducer, including a reducer bracket, a planetary gear assembly and a clutch assembly, and the planetary gear assembly includes a rotating shaft, an outer ring gear, a first-stage The sun gear, the first-stage planetary gear I, the first-stage planetary gear II and the first-stage planet carrier assembly, the first-stage sun gear is installed on the rotating shaft, and the first-stage planetary gear I and the first-stage planetary gear II are installed On the first-stage planet carrier assembly, the first-stage planetary gear II meshes with the outer ring gear, the rotating shaft is provided with meshing teeth for meshing with the first-stage planetary gear II, and the clutch assembly is connected with the rotating shaft to drive the rotation The shaft moves axially along the rotating shaft; when the rotating shaft moves axially to the position where the meshing teeth correspond to the first-stage planetary wheel II, the first-stage planetary wheel II meshes with the rotating shaft through the meshing teeth, and the first-stage planetary wheel I and The first-stage sun gear is separated; when the rotating shaft moves axially to the position corresponding to the first-stage sun gear and the first-stage planetary gear I, the first-stage planetary gear I meshes with the first-stage sun gear, and the meshing teeth on the rotating shaft and The first-stage planetary gear II is separated.

Preferably, the first-stage planetary gear I and the first-stage planetary gear II are connected through a connecting portion to form an integrated structure. The manufacture is convenient, and after the first-stage planetary gear I and the first-stage planetary gear II are connected to form an integrated structure through the connecting portion, the first-stage planetary gear I and the first-stage planetary gear II are coaxial and rotate synchronously.

Preferably, the clutch assembly includes a clutch seat, a clutch shaft and a cylindrical block, the clutch seat is fixedly connected to the outer ring gear, the clutch seat is provided with a mounting hole, and the clutch shaft is installed in the mounting hole and can be rotated To rotate, the rotating shaft is provided with an axially rotatable turntable, the side wall of the turntable in the circumferential direction is provided with a first annular groove, the cylindrical block is eccentrically connected to one end of the clutch shaft facing the turntable and into the first annular groove. Through the rotation of the clutch shaft, the cylindrical block exerts an active force on the turntable in the axial direction of the rotating shaft, thereby driving the rotating shaft to move in the axial direction.

As a preference, a clutch handle is provided at the end of the clutch shaft away from the turntable, a first groove is provided on the side of the clutch handle facing the clutch seat, and a second groove is provided on the outer wall of the clutch seat at a position corresponding to the first groove. Two grooves, the first groove is provided with a steel ball, and the first groove is provided with a clutch spring for pressing the steel ball against the second groove. By setting the clutch handle, it is more convenient to turn the clutch shaft; by setting the clutch spring and the steel ball between the clutch handle and the clutch seat, a limit structure is formed between the clutch handle and the clutch seat, and sufficient external force is required when turning the clutch handle Just can make steel ball break away from the second groove, when steel ball breaks away from the second groove, clutch handle just can rotate, promptly clutch shaft just can rotate.

As a preference, the side of the clutch shaft is provided with a second annular groove, and the clutch seat is provided with a clutch screw extending into the second annular groove, and the clutch shaft extends into the second annular groove through the clutch screw. The groove realizes axial positioning in the mounting hole of the clutch seat. The clutch shaft extends into the second annular groove through the clutch screw to achieve axial positioning in the mounting hole of the clutch seat, which has a simple structure and is easy to assemble and disassemble.

Preferably, the planetary gear assembly further includes a secondary planetary gear, a secondary planet carrier assembly, and a secondary sun gear. The secondary sun gear is sleeved outside the rotating shaft and can rotate axially relative to the rotating shaft. The two The first-stage sun gear is fixedly connected with the first-stage planetary carrier assembly. The second-stage planetary gear is arranged between the outer ring gear and the second-stage sun gear and meshes with the outer ring gear and the second-stage sun gear respectively. The second-stage planetary gear is installed in the secondary planetary carrier assembly. The two-stage planetary gear transmission is adopted, and the deceleration effect is good.

Beneficial effect:

After the utility model adopts the above-mentioned technical scheme, the axial movement of the rotating shaft is driven by the clutch assembly, so that the primary planetary gear I meshes with the primary sun gear, the meshing teeth on the rotating shaft are separated from the primary planetary gear II, or the primary planetary gear I Separated from the first-stage sun gear, the meshing teeth on the rotating shaft mesh with the first-stage planetary gear II to achieve the purpose of speed change. The planetary gear assembly is driven by the clutch to switch the speed. The structure is simple and the operation is convenient.

Description of drawings

Fig. 1 is the sectional view of the utility model under the slow gear state.

Fig. 2 is a sectional view of the utility model in a neutral state.

Fig. 3 is a sectional view of the utility model in a fast gear state.

Detailed ways

As shown in Figures 1 to 3, it is a preferred embodiment of a two-speed reducer of the present invention. The two-speed reducer mainly includes a reducer bracket 1, a planetary gear assembly and a clutch assembly, and the planetary gear assembly is installed on the reducer bracket 1 On, the clutch assembly is connected with the planetary gear assembly. A roller guard 18 is provided on the reducer bracket 1 .

Among them, the planetary gear assembly includes a rotating shaft 5, an outer ring gear 2, a primary sun gear 20, a primary planetary gear I21, a primary planetary gear II22, a primary planet carrier assembly 4, a secondary planetary gear 3, and a secondary planet carrier The component 30 and the secondary sun gear 31, one end of the outer ring gear 2 is connected to the reducer bracket 1 through several sets of first screws 15 and spring washers 12, and the seal ring 17 is used to seal between one end of the outer ring gear 2 and the reducer bracket 1, The primary sun gear 20 is installed on the rotating shaft 5, the primary planetary gear I 21 and the primary planetary gear II 22 are installed on the primary planet carrier assembly 4, the primary planetary gear II 22 meshes with the outer ring gear 2, and the primary planetary gear The outer diameters of I21 and the first-stage planetary wheel II22 are different. In this embodiment, the outer diameter of the first-stage planetary wheel II22 is larger than the outer diameter of the first-stage planetary wheel I21, and the rotating shaft 5 is provided with a ring for engaging with the first-stage planetary wheel II22. The meshing teeth 32.

The rotating shaft 5 can move axially so that the two-speed reducer is in three states of slow gear, neutral gear and fast gear. As shown in Figure 1, in the slow gear state, the first-stage planetary gear II 22 meshes with the rotating shaft 5 through the meshing teeth 32, and the first-stage planetary gear I21 is separated from the first-stage sun gear 20; as shown in Figure 2, in the neutral state Next, the first-stage planetary gear II 22 is separated from the meshing teeth 32 on the rotating shaft 5, and the first-stage planetary gear I21 is also separated from the first-stage sun gear 20; The first-stage sun gear 20 meshes, and the meshing teeth 32 on the rotating shaft 5 are separated from the first-stage planetary gear II 22 .

The secondary sun gear 31 is sleeved outside the rotating shaft 5 and can rotate axially relative to the rotating shaft 5. The secondary sun gear 31 is fixedly connected with the primary planetary carrier assembly 4. The secondary planetary gear 3 is arranged on the outer ring gear 2 and the secondary planetary gear. Between the primary sun gears 31 and meshes with the outer ring gear 2 and the secondary sun gears 31 respectively, the secondary planetary gears 3 are mounted on the secondary planet carrier assembly 30 . The hub bearing bush 19 is installed on the secondary planet carrier assembly 30 .

In this embodiment, the first-stage planetary gear I 21 and the first-stage planetary gear II 22 are connected through the connecting portion 23 to form an integrated structure. At this time, the first-stage planetary gear I 21 and the first-stage planetary gear II 22 are coaxial and synchronously driven. The first-stage planet carrier assembly 4 and the second-stage sun gear 31 are connected by welding, and the two can also be integrally formed to form an integral structure.

The clutch assembly is connected with the rotating shaft 5 and can drive the rotating shaft 5 to move axially. Specifically, the clutch assembly includes a clutch seat 6, a clutch shaft 13 and a cylindrical block 24. The clutch seat 6 and the outer ring gear 2 are also passed through the first screw 15. connection, a spring washer 12 and a small washer 16 are provided between the clutch seat 6 and the first screw 15, and a sealing ring 17 is used to seal between the end of the outer ring gear 2 and the clutch seat 6, and the clutch seat 6 is provided with a mounting hole, and the clutch shaft 13 is installed in the mounting hole and can rotate axially. The rotary shaft 5 is provided with a turntable 25 that can rotate axially. The side wall of the turntable 25 in the circumferential direction is provided with a first annular groove 26. One end of the clutch shaft 13 facing the turntable 25 extends into the first annular groove 26 . The clutch shaft 13 is provided with a clutch handle 7 away from the end of the rotating disk 25. The clutch handle 7 is connected with the clutch shaft 13 by a second screw 11. A spring washer 12 is arranged between the clutch handle 7 and the second screw 11. The clutch handle 7 faces One side of the clutch seat 6 is provided with a first groove 27, and on the outer wall of the clutch seat 6, three second grooves 28 are provided on the end face towards the side of the first groove 27, and the three second grooves 28 are along the The motion track distribution of the first groove 27 when the clutch shaft 13 rotates, the first groove 27 is provided with a steel ball 9, and the first groove 27 is provided with a clutch spring for pressing the steel ball 9 against the clutch seat 6 10. When the first groove 27 moves to a position corresponding to a certain second groove 28 , the clutch spring 10 presses the steel ball 9 into the second groove 28 . In this embodiment, the three second grooves 28 correspond to a gear position of the two-speed reducer respectively, that is, the first second groove 28 corresponds to the slow gear position, when the steel ball 9 touches the second groove 28, the two-speed reducer is in the slow gear; the second second groove 28 corresponds to the neutral gear, and when the steel ball 9 is in the second groove 28, the two-speed reducer is in the slow gear. Neutral gear position; the third second groove 28 corresponds to the fast gear position. When the steel ball 9 touches the second groove 28, the two-speed reducer is in the fast gear position.

The side of the clutch shaft 13 is provided with a second annular groove 29, and the clutch seat 6 is provided with a clutch screw 14 extending into the second annular groove 29, and the clutch shaft 13 extends into the second annular groove 29 through the clutch screw 14. Axial positioning is realized in the installation hole of the clutch seat 6.

Claims (6)

1. A two-speed reducer, characterized in that: it includes a reducer bracket (1), a planetary gear assembly and a clutch assembly, and the planetary gear assembly includes a rotating shaft (5), an outer ring gear (2), a first-stage sun wheel (20), primary planetary gear I (21), primary planetary gear II (22) and primary planet carrier assembly (4), the primary sun gear (20) is installed on the rotating shaft (5), Both the first-stage planetary gear I (21) and the first-stage planetary gear II (22) are installed on the first-stage planet carrier assembly (4), and the first-stage planetary gear II (22) meshes with the outer ring gear (2) , the rotating shaft (5) is provided with meshing teeth for meshing with the first-stage planetary gear II (22), and the clutch assembly is connected with the rotating shaft (5) to drive the rotating shaft (5) along the rotating shaft (5 ) axial movement; when the rotating shaft (5) moves axially to the position where the meshing teeth correspond to the primary planetary wheel II (22), the primary planetary wheel II (22) meshes with the rotating shaft (5) through the meshing teeth, And the primary planetary gear I (21) is separated from the primary sun gear (20); the rotating shaft (5) moves axially to the corresponding In the position, the primary planetary gear I (21) meshes with the primary sun gear (20), and the meshing teeth on the rotating shaft (5) are separated from the primary planetary gear II (22). 2. A two-speed reducer according to claim 1, characterized in that: the first-stage planetary gear I (21) and the first-stage planetary gear II (22) are connected through a connecting portion (23) to form an integrated structure. 3. A two-speed reducer according to claim 1 or 2, characterized in that: the clutch assembly includes a clutch seat (6), a clutch shaft (13) and a cylindrical block (24), and the clutch seat (6) is fixedly connected with the outer ring gear (2), the clutch seat (6) is provided with a mounting hole, the clutch shaft (13) is installed in the mounting hole and can rotate axially, and the rotating shaft (5) An axially rotatable turntable (25) is provided on the top, and a first annular groove (26) is provided on the side wall of the turntable (25) in the circumferential direction, and the cylindrical block (24) is eccentrically connected to the clutch shaft (13) faces one end of the turntable (25) and extends into the first annular groove (26). 4. A two-speed reducer according to claim 3, characterized in that: the end of the clutch shaft (13) away from the turntable (25) is provided with a clutch handle (7), and the clutch handle (7) faces One side of the clutch seat (6) is provided with a first groove (27), and a steel ball (9) is arranged in the first groove (27), and a steel ball (9) is arranged in the first groove (27) for The steel ball (9) is against the clutch spring (10) on the outer wall of the clutch seat (6), and the outer wall of the clutch seat (6) is provided with a second groove ( 28), when the first groove (27) moves to a position corresponding to the second groove (28), the clutch spring (10) presses the steel ball (9) into the second groove (28). 5. A two-speed reducer according to claim 3, characterized in that: a second annular groove (29) is provided on the side of the clutch shaft (13), and a second annular groove (29) is provided on the clutch seat (6). There is a clutch screw (14) extending into the second annular groove (29), and the clutch shaft (13) is inserted into the second annular groove (29) through the clutch screw (14) to achieve axial positioning on the clutch seat (6) in the mounting hole. 6. A two-speed speed reducer according to claim 1, characterized in that: the planetary gear assembly also includes a secondary planetary gear (3), a secondary planetary carrier assembly (30) and a secondary sun gear (31 ), the secondary sun gear (31) is sleeved on the outside of the rotating shaft (5) and can rotate axially relative to the rotating shaft (5), the secondary sun gear (31) and the primary planet carrier assembly (4) Fixedly connected, the secondary planetary gear (3) is arranged between the external ring gear (2) and the secondary sun gear (31) and meshes with the external ring gear (2) and the secondary sun gear (31) respectively, so The secondary planetary gear (3) is installed on the secondary planet carrier assembly (30).