A speed regulating centrifuge gearbox

Abstract

The utility model discloses a centrifuge gearbox for speed regulation, including the casing, be equipped with the speed change module in the casing, and the speed change module realizes the transmission of different transmission ratio through the switching of gear engagement to adjust the rotating speed of output shaft, and the outside of speed change module is equipped with buffer module, and buffer module realizes the smooth transition of power when driving motor transmits power to input shaft. The utility model discloses the flexible constraint of centrifugal shoe piece in the pre -tight spring of buffer module, can realize power smooth transition when driving motor transmits power to input shaft, alleviates instantaneous impact, reduces the abrasion of input shaft, gear and other components, prolongs the life, and the synchronous ring in speed change module can make the spline hub and target output gear synchronous speed in the shifting process, and better adaptation centrifuge different working condition's speed regulation demand.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge gearbox technology, specifically a centrifuge gearbox for speed regulation. Background Technology

[0002] Existing centrifuge gearboxes typically need to be adapted to the intermittent or continuous operation of centrifuges. During power transmission, the power from the drive motor needs to be smoothly transmitted to the input shaft, and then transmitted to the output shaft after adjusting the transmission ratio through the internal transmission structure, ultimately driving the drum to achieve speed regulation. Its operational stability directly affects the separation effect and overall production efficiency of the centrifuge. Therefore, ensuring the reliability of the power transmission process and the adaptability of speed regulation are the core requirements that existing centrifuge gearboxes need to meet in order to support the normal operation of centrifuges in different industrial scenarios.

[0003] During operation, the power output of the speed-regulating centrifuge gearbox experiences momentary fluctuations when the drive motor starts. The motor power directly acts on the input shaft, and when the centrifuge load changes, the force on the input shaft suddenly changes, further exacerbating the impact and leading to accelerated wear of the input shaft, gears, and other transmission components, thus shortening their service life. To address this, we propose a speed-regulating centrifuge gearbox. Utility Model Content

[0004] The purpose of this invention is to provide a speed-regulating centrifuge gearbox to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a centrifuge gearbox for speed regulation, comprising a housing, a speed change module provided inside the housing, the speed change module realizes the transmission of different transmission ratios through gear meshing switching to adjust the speed of the output shaft, and a buffer module provided outside the speed change module, the buffer module realizes a smooth transition of power when the drive motor transmits power to the input shaft.

[0006] Preferably, the transmission module includes a bearing sleeve fixedly connected to the housing, an input shaft rotatably connected to the bearing sleeve, a primary input gear and a secondary input gear fixedly connected to the input shaft, a primary output gear meshing with the primary input gear, a secondary output gear meshing with the secondary input gear, both the primary and secondary output gears being rotatably connected to an output shaft bearing, an output shaft fixedly connected to the output shaft bearing, an external spline in the middle of the output shaft meshing with a spline hub, synchronization rings fitting on both sides of the spline hub, a coupling sleeve fitted on the surface of the spline hub, and internal teeth fixedly connected to the coupling sleeve.

[0007] Preferably, the buffer module includes a drive motor fixedly connected to the housing, a drive shaft fixedly connected to the drive motor, a connecting plate fixedly connected to the drive shaft, three pins fixedly connected to the connecting plate, and a centrifugal shoe rotatably connected to each of the three pins. A pre-tension spring is fixedly connected to one end of the centrifugal shoe, and the other end of the pre-tension spring is fixedly connected to the next centrifugal shoe. The whole is arranged in a ring. A baffle is fixedly connected to the upper end of the pin. A rotating disk is provided on the outside of the connecting plate, and the rotating disk is fixedly connected to the input shaft.

[0008] Preferably, the outer side of the engaging sleeve is provided with an annular fork groove.

[0009] Preferably, a tapered friction surface is provided on the inner side of the synchronization ring.

[0010] Preferably, the centrifugal shoe is provided with a friction lining on the outside.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: When in use, the pre-tightening spring in the buffer module provides flexible constraint on the centrifugal shoes, which enables a smooth power transition when the drive motor transmits power to the input shaft, thus alleviating instantaneous impact, reducing wear on components such as the input shaft and gears, and extending service life. The synchronization ring in the speed change module can quickly synchronize the speed of the splined hub with the target output gear during gear shifting, better adapting to the speed regulation requirements of different operating conditions of the centrifuge. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the speed change module of this utility model; Figure 3 This is an internal view of the speed change module of this utility model; Figure 4 This is a schematic diagram of the buffer module of this utility model; Figure 5 This is an internal view of the buffer module of this utility model.

[0013] In the diagram: 1. Housing; 2. Transmission module; 21. Bearing sleeve; 22. Input shaft; 23. First-stage input gear; 24. Second-stage input gear; 25. First-stage output gear; 26. Second-stage output gear; 27. Output shaft bearing; 28. Output shaft; 29. ​​External spline; 210. Splined hub; 211. Synchronizing ring; 212. Engaging sleeve; 213. Internal gear; 3. Buffer module; 31. Drive motor; 32. Transmission shaft; 33. Connecting disc; 34. Pin; 35. Centrifugal shoe; 36. Preload spring; 37. Baffle; 38. Rotating disc; 4. Annular shift fork groove; 5. Conical friction surface; 6. Friction lining. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0015] Please see Figures 1 to 5 This utility model provides a technical solution: a speed-regulating centrifuge gearbox, comprising: a housing 1, which is a cast closed cavity with a reserved fixed position for installing a speed-changing module 2 and a buffer module 3. The housing 1 is equipped with the speed-changing module 2, which transmits different transmission ratios through gear meshing to adjust the speed of the output shaft 28. The buffer module 3 is provided on the outside of the speed-changing module 2, which smoothly transitions power when the drive motor 31 transmits power to the input shaft 22. During operation, the buffer module 3 first receives the power from the drive motor 31 and smoothly transitions it, then transmits the power to the input shaft 22 of the speed-changing module 2. The speed-changing module 2 adjusts the transmission ratio by switching gear meshing relationships, and finally the output shaft 28 outputs the corresponding speed to adapt to the speed regulation requirements of the centrifuge under different operating conditions.

[0016] The transmission module 2 includes a bearing sleeve 21 fixedly connected to the housing 1. The bearing sleeve 21 is fixed to the housing 1 at a preset mounting position by bolts. The bearing sleeve 21 is rotatably connected to an input shaft 22. The input shaft 22 is fixedly connected to a first-stage input gear 23 and a second-stage input gear 24 by a flat key. The first-stage input gear 23 meshes with a first-stage output gear 25, and the second-stage input gear 24 meshes with a second-stage output gear 26. Both the first-stage output gear 25 and the second-stage output gear 26 rotate through an inner hole with the outer ring of the output shaft bearing 27. The output shaft 28 is fixedly connected to the inner ring of the output shaft bearing 27. An external spline 29 is located in the middle of the output shaft 28, and the external spline 29 engages with a splined hub 210. Synchronizing rings 211 are fitted on both sides of the splined hub 210. A tapered friction surface 5 is provided on the inner side of the synchronizing ring 211. The inner ring of the synchronizing ring 211 is fitted with the end face of the splined hub 210. A coupling sleeve 212 is fitted onto the surface of the splined hub 210. An annular shift fork groove 4 is provided on the outer side of the coupling sleeve 212. The inner hole of the coupling sleeve 212 is aligned with the outer circle of the splined hub 210. In a sliding fit, the engaging sleeve 212 is fixedly connected with internal gears 213. The input shaft 22 rotates under the drive of external power, synchronously driving the first-stage input gear 23 and the second-stage input gear 24 to rotate. The first-stage input gear 23 meshes and drives the first-stage output gear 25 to rotate, and the second-stage input gear 24 meshes and drives the second-stage output gear 26 to rotate. At this time, the first-stage output gear 25 and the second-stage output gear 26 only rotate themselves and do not transmit power to the output shaft 28. When it is necessary to switch the transmission ratio, the engaging sleeve 212 is pushed to move axially along the spline hub 210 through the annular shift fork groove 4, so that the internal gears 213 of the engaging sleeve 212 mesh with the first-stage output gear 25 or the second-stage output gear 26. At this time, the power of the corresponding output gear is transmitted to the spline hub 210 through the engaging sleeve 212. The spline hub 210 then drives the output shaft 28 to rotate through the external spline 29 to achieve different speed outputs. During the movement of the engaging sleeve 212, the synchronous ring 211 synchronizes the speed of the spline hub 210 with the target output gear through the friction of the synchronous ring 211, ensuring smooth meshing.

[0017] The buffer module 3 includes a drive motor 31 fixedly connected to the housing 1. The drive motor 31 is fixed to the outside of the housing 1 via a flange. A drive shaft 32 is fixedly connected to the output end of the drive motor 31. The drive shaft 32 is fixedly connected to the drive motor 31 via a coupling. A connecting plate 33 is fixedly connected to the end of the drive shaft 32 away from the drive motor 31. The connecting plate 33 is fixed to the drive shaft 32 via bolts. Pins 34 are fixedly connected to the connecting plate 33. Three pins 34 are evenly distributed along the circumference of the connecting plate 33. Each of the three pins 34 is rotatably connected to a centrifugal shoe 35 via a bearing. Friction lining 6 is provided on the outer side of the centrifugal shoe 35. A spring hanging hole is provided at one end of the centrifugal shoe 35, and a preload spring 36 is fixedly connected thereto. The other end of the preload spring 36 is fixedly connected to the spring hanging hole of the next centrifugal shoe 35. The three centrifugal shoes 35 and the preload spring 36 are arranged in a ring. A baffle 37 is fixedly connected to the upper end of the pin 34 by a nut. The baffle 37 is used to restrict the centrifugal shoe 35 from moving along the axial direction of the pin 34. A rotating disk 38 is provided on the outer side of the connecting disk 33. The inner hole of the rotating disk 38 is fixedly connected to the end of the input shaft 22. The inner side wall of the rotating disk 38 is opposite to the friction lining 6 on the outer side of the centrifugal shoe 35. During operation, after the drive motor 31 starts, it drives the transmission shaft 32 to rotate. The transmission shaft 32 synchronously drives the connecting disc 33 to rotate. During the rotation of the connecting disc 33, the three centrifugal shoes 35 tend to open outward under the action of centrifugal force. In the initial state, the pre-tension spring 36 exerts a restraining force on the centrifugal shoes 35 to limit their excessive opening. As the speed of the drive motor 31 increases, the centrifugal force of the centrifugal shoes 35 gradually exceeds the restraining force of the pre-tension spring 36. The outer side of the centrifugal shoes 35 gradually comes into contact with the inner sidewall of the rotating disc 38. Through friction, the rotating disc 38 is driven to rotate. The rotating disc 38 then transmits power to the input shaft 22 fixed to it, completing the smooth transition of power from the drive motor 31 to the input shaft 22, avoiding damage to the gear meshing structure of the transmission module 2 caused by the instantaneous impact of power transmission. Example 2

[0018] In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that the outer side of the engagement sleeve is provided with an annular shift fork groove 4. The annular shift fork groove 4 can make the shifting operation more stable, improve the smoothness of the power transmission process, and extend the service life of the transmission components inside the gearbox. The inner side of the synchronization ring is provided with a conical friction surface 5. The conical friction surface 5 can reduce the impact when the spline hub 210 meshes with the output gear during the shifting process, avoid meshing collisions caused by speed differences, and protect the gear tooth surface. The outer side of the centrifugal shoe is provided with a friction lining 6. The friction lining 6 can enhance the contact friction with the rotating disk 38 and further weaken the instantaneous impact force when the drive motor 31 transmits power to the input shaft 22.

[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A speed-regulating centrifuge gearbox, comprising a housing, characterized in that: The housing is equipped with a speed change module, which realizes the transmission of different transmission ratios through the switching of gear meshing to adjust the speed of the output shaft. A buffer module is provided on the outside of the speed change module, which smoothly transitions the power when the drive motor transmits power to the input shaft.

2. The centrifuge gearbox for speed regulation according to claim 1, characterized in that: The transmission module includes a bearing sleeve fixedly connected to the housing. The bearing sleeve is rotatably connected to an input shaft. The input shaft is fixedly connected to a primary input gear and a secondary input gear. The primary input gear meshes with a primary output gear, and the secondary input gear meshes with a secondary output gear. Both the primary and secondary output gears are rotatably connected to an output shaft bearing. The output shaft bearing is fixedly connected to an output shaft. An external spline is provided in the middle of the output shaft. The external spline meshes with a spline hub. Synchronizing rings are attached to both sides of the spline hub. A coupling sleeve is fitted on the surface of the spline hub. The coupling sleeve is fixedly connected to internal teeth.

3. The centrifuge gearbox for speed regulation according to claim 2, characterized in that: The buffer module includes a drive motor fixedly connected to the housing, a drive shaft fixedly connected to the drive motor, a connecting plate fixedly connected to the drive shaft, three pins fixedly connected to the connecting plate, each of the three pins rotatably connected to a centrifugal shoe, a pre-tension spring fixedly connected to one end of each centrifugal shoe, and the other end of the pre-tension spring fixedly connected to the next centrifugal shoe, forming a ring arrangement. A baffle is fixedly connected to the upper end of each pin, and a rotating disk is provided on the outside of the connecting plate, with the rotating disk fixedly connected to the input shaft.

4. The centrifuge gearbox for speed regulation according to claim 2, characterized in that: The outer side of the coupling sleeve is provided with an annular shift fork groove.

5. The centrifuge gearbox for speed regulation according to claim 2, characterized in that: The inner side of the synchronization ring is provided with a conical friction surface.

6. The centrifuge gearbox for speed regulation according to claim 3, characterized in that: The centrifugal shoe is provided with a friction lining on its outer side.

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