Double-speed output speed reducer

Abstract

A differential device is arranged in a box body and comprises an input shaft arranged in the box body in a penetrating mode, an output shaft is arranged at one end of the input shaft, a first gear shaft is arranged at the position, located on one side of the input shaft, in the box body, a second gear shaft is arranged on one side of the first gear shaft, a gear 1B is arranged on the input shaft in a sleeving mode, and a gear 3B is arranged on the first gear shaft in a sleeving mode. An overrun clutch B is arranged between the gear 3B and the first gear shaft. The output shaft is sleeved with a gear 1C, the end, facing the gear 1C, of the first gear shaft is provided with first clamping teeth, the gear 1C is meshed with the first clamping teeth, the end, away from the gear 1C, of the input shaft is sleeved with a gear 1A, the second gear shaft is sleeved with a gear 3C, and the gear 3C is meshed with the gear 1A. A gear 3A is arranged on the side, located on the gear 3B, of the first gear shaft in a sleeving mode, the second gear shaft is provided with second clamping teeth meshed with the gear 3A, and an overrun clutch A in the same installation direction as the overrun clutch B is arranged between the gear 3A and the first gear shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of speed reducers, and particularly to a two-speed output speed reducer. Background Art

[0002] A speed reducer is a transmission device used to reduce the rotational speed of the output shaft and increase the torque. It is usually installed between the driving motor and the load. Through a reduction mechanism such as a gear set or a worm and worm gear, it converts the high-speed and low-torque input into a low-speed and high-torque output to meet the requirements of mechanical equipment for low-speed and high-power. It has the characteristics of a compact structure, high transmission efficiency, and stable operation, and is widely used in fields such as industrial automation, robotics, and new energy vehicles. It can effectively improve the performance and control accuracy of equipment, reduce vibration and noise, and extend the service life.

[0003] The publication number is: CN211550437U discloses a speed reducer with forward and reverse power output. The present invention includes a box body fixed on the engine and a forward and reverse device and a reduction and differential device installed in the box body. The driving bevel gear in the forward and reverse device meshes with the first and second bevel gears at the same time. The first bevel gear, the spline concave-convex intermediate wheel, and the second bevel gear are all sequentially installed on the spline shaft handle of the angular gear shared by the reduction and differential device and the forward and reverse device. The ends of the first and second bevel gears opposite to the spline concave-convex intermediate wheel have concave-convex tooth grooves and can rotate on the spline shaft handle of the shared angular gear, but in opposite directions. The two ends of the spline concave-convex intermediate wheel have concave-convex tooth grooves and are spline key-connected to the spline shaft handle of the shared angular gear and can slide along the shaft handle. After being combined with the first bevel gear through the concave-convex tooth grooves under the action of the fork, the angular gear rotates, and the differential assembly and the power output shaft are driven to rotate in a certain direction by the crown gear; similarly, after the spline concave-convex intermediate wheel is combined with the second bevel gear, the differential assembly and the power output shaft rotate in the opposite direction. This technology uses a fork to control the forward and reverse rotation of the motor to output two speeds. The two gear ratios are the same, and the difference between the two output speeds is small, so the applicable range is small. Therefore, there is still some room for improvement in this technology. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a two-speed output speed reducer in view of the deficiencies of the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides the following technical solution. A two-speed output reducer includes a box body, and a differential device is arranged inside the box body. It is characterized in that: the differential device includes an input shaft passing through the box body, an output shaft is arranged at one end of the input shaft, a first gear shaft is arranged on one side of the input shaft inside the box body, a second gear shaft is arranged on one side of the first gear shaft, a gear 1B is sleeved on the input shaft, a gear 3B is sleeved on the first gear shaft, the gear 1B meshes with the gear 3B, an overrunning clutch B is arranged between the gear 3B and the first gear shaft, a gear 1C is sleeved on the output shaft, a first tooth is arranged at one end of the first gear shaft facing the gear 1C, the gear 1C meshes with the first tooth, a gear 1A is sleeved at one end of the input shaft away from the gear 1C, a gear 3C is sleeved on the second gear shaft, the gear 3C meshes with the gear 1A, a gear 3A is sleeved on the first gear shaft on one side of the gear 3B, the second gear shaft is provided with a second tooth meshing with the gear 3A, and an overrunning clutch A with the same installation direction as the overrunning clutch B is arranged between the gear 3A and the first gear shaft.

[0006] Adopting the above technical solution, when the input shaft rotates forward by an external motor, the gear 1B drives the gear 3B to rotate. The overrunning clutch is a commonly used clutch in machinery at present, which is divided into an inner ring and a rotatably connected outer ring. The gears 1A and 3C are arranged in a zigzag manner and are meshing gears in space. The gear 3B drives the inner ring of the overrunning clutch B and the first gear shaft to rotate by setting a flat key. At this time, the gears 1A and 3C drive the second gear shaft to rotate, the second gear shaft drives the gear 3A to rotate, and the gear 3A drives the outer ring of the overrunning clutch A to rotate. At this time, the rotation direction of the outer ring of the overrunning clutch A is opposite to that of the outer ring of the overrunning clutch B. Also, since the installation directions of the inner and outer rings of the two overrunning clutches are the same, therefore, the inner and outer rings of the overrunning clutch A are in an overrunning slip state. The motor torque is output through the gears 1B, 3B, first gear shaft, and gear 1C, which is a two-stage transmission; when the motor rotates in reverse, the overrunning clutch B is in an overrunning slip state, and the motor torque is output through the gears 1A, 3C, second gear shaft, gear 3A, first gear shaft, and gear 1C, which is a three-stage transmission. By the forward and reverse rotation of the motor, two different transmission ratios are realized, the difference in the two-speed output speed is increased, and the rotation direction of the output shaft remains unchanged, increasing the applicability.

[0007] The above-mentioned two-speed output reducer can be further set as follows: An input flange is provided at one end of the box body away from the output shaft. The input flange includes an input flange housing fixedly connected to the box body. The input shaft passes through the input flange housing. The input flange housing is provided with input flange connection holes on both sides of the input shaft. A ball bearing is provided between the input flange housing and the input shaft. Both the end of the input shaft and the input flange housing are provided with abutting grooves for the axial abutment of the balls. A gasket is provided between the ball bearing and the input flange connection hole. One end of the ball bearing abuts against the gasket and the other end abuts against the abutting groove.

[0008] Adopting the above technical solution, the input flange housing is fixedly connected to the box body, providing a stable support for the input shaft; the setting of the ball bearing reduces the frictional resistance during the rotation of the input shaft, improves the transmission efficiency, and at the same time, the cooperation of the abutting grooves at both ends with the ball bearing ensures the accuracy of axial positioning, preventing axial displacement. The gasket is located between the ball bearing and the input flange connection hole, effectively blocking impurities such as dust and moisture from entering the interior of the box body, and prolonging the service life of the bearing and the reducer.

[0009] The above-mentioned two-speed output reducer can be further set as follows: An output flange is provided at one end of the box body where the output shaft is located. The output flange includes an output flange housing fixedly connected to the box body. The output shaft passes through the output flange housing. The output flange housing is provided with mounting holes on both sides of the output shaft. Connecting bolts are provided in the mounting holes. The output flange housing is fixedly connected to the box body through the mounting holes and the connecting bolts. Connection holes for connecting with external equipment are symmetrically arranged on both sides of the output flange housing.

[0010] Adopting the above technical solution, the output flange housing is fixedly connected to the box body, providing a reliable support and positioning for the output shaft; the connecting bolts provided in the mounting holes ensure the tight connection between the output flange housing and the box body, preventing loosening or displacement caused by vibration or external force. The symmetrically arranged connection holes facilitate the connection with external equipment.

[0011] The above-mentioned two-speed output reducer can be further set as follows: A first spherical roller bearing is sleeved at the connection between the output shaft and the input shaft, and a second spherical roller bearing is provided between the output shaft and the output flange housing.

[0012] With the above technical solution, by respectively arranging a first spherical roller bearing at the connection between the output shaft and the input shaft and a second spherical roller bearing between the output shaft and the output flange housing, the self-aligning function of the spherical roller bearing effectively compensates for the axial and radial installation errors, reduces the bearing partial load and wear caused by shaft inclination or offset, ensures a more stable power transmission between the output shaft and the input shaft. At the same time, the setting of the second spherical roller bearing further optimizes the support performance between the output shaft and the output flange housing, preventing shaft deformation or loosening caused by vibration or external impact.

[0013] The above-mentioned two-speed output reducer can be further set as: both the input shaft and the input shaft are made of 42CrMo steel.

[0014] With the above technical solution, using 42CrMo steel as the material of the input shaft and the output shaft significantly improves the strength and durability of the core components of the two-speed output reducer. 42CrMo is a high-strength alloy steel with high yield strength, fatigue resistance and good toughness, and can withstand long-term operation under high load and complex stress conditions.

[0015] The beneficial effects of the present invention: By reversing the motor, two different transmission ratios are achieved, increasing the difference in the output speeds of the two gears, and the rotation direction of the output shaft remains unchanged, increasing the applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is an enlarged view of part A of the present invention; Figure 3 is an enlarged view of part B of the present invention; Label annotation: 1 - housing, 2 - input shaft, 3 - output shaft, 4 - first gear shaft, 5 - second gear shaft, 6 - gear 1B, 7 - gear 3B, 8 - overrunning clutch B, 9 - gear 1C, 10 - first detent, 11 - gear 1A, 12 - gear 3C, 13 - gear 3A, 14 - second detent, 15 - overrunning clutch A, 16 - input flange, 17 - input flange housing, 18 - input flange connection hole, 19 - ball bearing, 20 - abutting groove, 21 - gasket, 22 - output flange, 23 - output flange housing, 24 - mounting hole, 25 - connecting bolt, 26 - connecting hole, 27 - first spherical roller bearing, 28 - second spherical roller bearing. DETAILED DESCRIPTION OF THE INVENTION

[0017] This specific embodiment is only an interpretation of the present invention and does not limit the present invention. Those skilled in the art can make modifications to this embodiment without creative contributions according to their needs after reading this specification. However, as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0018] As Figures 1-3 shown, the present invention provides the following technical solution: a two-speed output reducer, including a box body 1. A differential device is arranged inside the box body 1. The differential device includes an input shaft 2 passing through the box body 1. One end of the input shaft 2 is provided with an output shaft 3. Inside the box body 1, a first gear shaft 4 is arranged on one side of the input shaft 2, and a second gear shaft 5 is arranged on one side of the first gear shaft 4. The input shaft 2 is sleeved with a gear 1B6, the first gear shaft 4 is sleeved with a gear 3B7, the gear 1B6 meshes with the gear 3B7, and an overrunning clutch B8 is arranged between the gear 3B7 and the first gear shaft 4. The output shaft 3 is sleeved with a gear 1C9. One end of the first gear shaft 4 facing the gear 1C9 is provided with a first engaging tooth 10, and the gear 1C9 meshes with the first engaging tooth 10. One end of the input shaft 2 far from the gear 1C9 is sleeved with a gear 1A11. The second gear shaft 5 is sleeved with a gear 3C12, and the gear 3C12 meshes with the gear 1A11. The first gear shaft 4 is sleeved with a gear 3A13 on one side of the gear 3B7. The second gear shaft 5 is provided with a second engaging tooth 14 meshing with the gear 3A13, and an overrunning clutch A15 with the same installation direction as the overrunning clutch B8 is arranged between the gear 3A13 and the first gear shaft 4. When the input shaft 2 rotates forward through an external motor, the gear 1B6 drives the gear 3B7 to rotate. The overrunning clutch is a commonly used clutch in machinery at present, which is divided into an inner ring and a rotatably connected outer ring. The gear 1A11 and the gear 3C12 are arranged in a zigzag shape, and the gear 1A11 and the gear 3C12 are meshing gears in space. The gear 3B7 drives the inner ring of the overrunning clutch B8 and the first gear shaft 4 to rotate by setting a flat key. At this time, the gear 1A11 and the gear 3C12 drive the second gear shaft 5 to rotate, the second gear shaft 5 drives the gear 3A13 to rotate, and the gear 3A13 drives the outer ring of the overrunning clutch A15 to rotate. At this time, the rotation direction of the outer ring of the overrunning clutch A15 is opposite to that of the outer ring of the overrunning clutch B8. Also, because the installation directions of the inner and outer rings of the two overrunning clutches are the same, therefore, the inner and outer rings of the overrunning clutch A15 are in an overrunning slip state. The motor torque is output through the gear 1B6, the gear 3B7, the first gear shaft 4, and the gear 1C9, which is a two-stage transmission; when the motor rotates in reverse, the overrunning clutch B8 is in an overrunning slip state, and the motor torque is output through the gear 1A11, the gear 3C12, the second gear shaft 5, the gear 3A13, the first gear shaft 4, and the gear 1C9, which is a three-stage transmission. By the forward and reverse rotation of the motor, two different transmission ratios are realized, the difference in the output speeds of two gears is increased, and the rotation direction of the output shaft 3 remains unchanged, increasing the applicability.

[0019] As Figures 1-3The present invention provides the following technical solution. A two-speed output reducer, at one end of the input shaft 2 away from the output shaft 3 of the housing 1, there is an input flange 16. The input flange 16 includes an input flange housing 17 fixedly connected to the housing 1. The input shaft 2 passes through the input flange housing 17. On both sides of the input shaft 2 in the input flange housing 17, there are input flange connection holes 18. Between the input flange housing 17 and the input shaft 2, there is a ball bearing 19. At the end of the input shaft 2 and on the input flange housing 17, there are abutting grooves 20 for the axial abutment of the balls. Between the ball bearing 19 and the input flange connection holes 18, there is a gasket 21. One end of the ball bearing 19 abuts against the gasket 21 and the other end abuts against the abutting groove 20. The input flange housing 17 is fixedly connected to the housing 1, providing a stable support for the input shaft 2; the setting of the ball bearing 19 reduces the frictional resistance during the rotation of the input shaft 2, improves the transmission efficiency, and at the same time, the cooperation between the abutting grooves 20 at both ends and the ball bearing 19 ensures the accuracy of axial positioning, preventing axial displacement. The gasket 21 is located between the ball bearing 19 and the input flange connection holes 18, effectively blocking impurities such as dust and moisture from entering the interior of the housing 1, extending the service life of the bearing and the reducer. At one end of the housing 1 where the output shaft 3 is located, there is an output flange 22. The output flange 22 includes an output flange housing 23 fixedly connected to the housing 1. The output shaft 3 passes through the output flange housing 23. On both sides of the output shaft 3 in the output flange housing 23, there are mounting holes 24. In the mounting holes 24, there are connecting bolts 25. The output flange housing 23 is fixedly connected to the housing 1 through the mounting holes 24 and the connecting bolts 25. On both sides of the output flange housing 23, there are symmetrically arranged connection holes 26 for connecting with external equipment. The output flange housing 23 is fixedly connected to the housing 1, providing a reliable support and positioning for the output shaft 3;The connecting bolt 25 arranged in the mounting hole 24 ensures the tight connection between the output flange housing 23 and the box body 1, preventing loosening or displacement caused by vibration or external force. The symmetrically arranged connecting holes 26 facilitate the connection with external devices. A first spherical roller bearing 27 is sleeved at the connection between the output shaft 3 and the input shaft 2, and a second spherical roller bearing 28 is arranged between the output shaft 3 and the output flange housing 23. By respectively arranging the first spherical roller bearing 27 and the second spherical roller bearing 28 at the connection between the output shaft 3 and the input shaft 2 and between the output shaft 3 and the output flange housing 23, the self-aligning function of the spherical roller bearing effectively compensates for the axial and radial installation errors, reduces the bearing partial load and wear caused by shaft inclination or offset, and ensures that the power transmission between the output shaft 3 and the input shaft 2 is more stable. At the same time, the setting of the second spherical roller bearing 28 further optimizes the supporting performance between the output shaft 3 and the output flange housing 23, preventing shaft deformation or loosening caused by vibration or external impact. The materials of the input shaft 2 and the output shaft 3 are both 42CrMo steel. Using 42CrMo steel as the materials of the input shaft 2 and the output shaft 3 significantly improves the strength and durability of the core components of the two-speed output reducer. 42CrMo is a high-strength alloy steel with high yield strength, fatigue resistance and good toughness, and can withstand long-term operation under high load and complex stress conditions.;

[0020] Advantages of the present invention: By reversing the motor, two different transmission ratios are achieved, increasing the difference in the output speeds of the two gears, and the rotation direction of the output shaft 3 remains unchanged, increasing the applicability.

Claims

1. A two-speed output reducer, comprising a box body, and a differential device is provided inside the box body, characterized in that: The differential device includes an input shaft passing through the box body. One end of the input shaft is provided with an output shaft. A first gear shaft is arranged on one side of the input shaft in the box body. A second gear shaft is arranged on one side of the first gear shaft. The input shaft is sleeved with a gear 1B. The first gear shaft is sleeved with a gear 3B. The gear 1B meshes with the gear 3B. An overrunning clutch B is arranged between the gear 3B and the first gear shaft. The output shaft is sleeved with a gear 1C. One end of the first gear shaft facing the gear 1C is provided with a first tooth. The gear 1C meshes with the first tooth. One end of the input shaft away from the gear 1C is sleeved with a gear 1A. The second gear shaft is sleeved with a gear 3C. The gear 3C meshes with the gear 1A. The first gear shaft is sleeved with a gear 3A on one side of the gear 3B. The second gear shaft is provided with a second tooth meshing with the gear 3A. An overrunning clutch A with the same installation direction as the overrunning clutch B is arranged between the gear 3A and the first gear shaft.

2. The two-speed output reducer according to claim 1, wherein: An input flange is arranged at one end of the box body away from the output shaft. The input flange includes an input flange housing fixedly connected to the box body. The input shaft passes through the input flange housing. The input flange housing is provided with input flange connection holes on both sides of the input shaft. A ball bearing is arranged between the input flange housing and the input shaft. Both the end of the input shaft and the input flange housing are provided with abutting grooves for the axial abutment of the balls. A sealing gasket is arranged between the ball bearing and the input flange connection hole. One end of the ball bearing abuts against the sealing gasket and the other end abuts against the abutting groove.

3. A two-speed output speed reducer according to claim 2, characterized in that: An output flange is arranged at one end of the box body where the output shaft is located. The output flange includes an output flange housing fixedly connected to the box body. The output shaft passes through the output flange housing. The output flange housing is provided with mounting holes on both sides of the output shaft. Connecting bolts are arranged in the mounting holes. The output flange housing is fixedly connected to the box body through the mounting holes and the connecting bolts. Connection holes for connecting to external equipment are symmetrically arranged on both sides of the output flange housing.

4. A two-speed output speed reducer according to claim 3, characterized in that: A first spherical roller bearing is sleeved at the connection between the output shaft and the input shaft. A second spherical roller bearing is arranged between the output shaft and the output flange housing.

5. A two-speed output speed reducer according to claim 1, characterized in that: The input shaft and the output shaft are both made of 42CrMo steel.

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