Input synchronous drive

Abstract

An input synchronization drive device includes: two rotary power sources; two coaxially opposite intermediate shafts, each intermediate shaft being connected to the output shaft of a corresponding power source via a transmission sleeve; a common power output element; a transmission mechanism disposed between each intermediate shaft and the power output element; and a power coupling element connected between the ends of the two intermediate shafts, the power coupling element being configured to synchronize the rotational motion of the two intermediate shafts. This enables synchronization of input motion from both power sources.

Description

Technical Field

[0001] This application relates to an input synchronization drive device, wherein the rotational power input on both sides is synchronized. Background Technology

[0002] Many devices employ drive units that output rotational power. Various types of these drive units require different output power levels depending on the operating conditions, and may also need to ensure balanced power on both sides. Therefore, drive units are typically equipped with two rotational power sources. Depending on the operating conditions, only one power source can be activated, or both power sources can be activated simultaneously. For example, belt conveyors use drive rollers to drive the belt in a cyclical motion. Motors are installed on both sides of the drive rollers. When the belt conveyor starts, the drive rollers need to output high power; as the belt conveyor stabilizes, the required output power decreases. Furthermore, depending on factors such as load size and conveyor speed, the required output power of the drive rollers varies under different operating conditions. Therefore, the drive rollers may activate one motor or both motors simultaneously, depending on the operating conditions of the belt conveyor.

[0003] When the two power sources of a drive device that outputs rotational power are started simultaneously, their input motion is transmitted to the same drive element, such as a drive roller, through their respective transmission mechanisms. If the input motions of the two power sources are not synchronized, it will lead to an imbalance in the power transmitted to the drive element, causing noise, vibration, wear, misalignment between the two sides, and even malfunction. CN209455539U discloses a drive roller at the head of a belt conveyor, in which two gear transmission mechanisms are connected by a synchronizing cylinder, which is coaxially arranged inside the roller. However, the two ends of the synchronizing cylinder in this document are fixed to the mounting frame, which is not a component in the motion transmission line. Therefore, the synchronizing cylinder has no effect on the motion input and output of the drive roller at the head, and cannot achieve input motion synchronization. Utility Model Content

[0004] The purpose of this application is to provide an input synchronization drive device that can synchronize input motion from two power sources.

[0005] Therefore, this application provides an input synchronization drive device in one aspect, comprising: Two rotary power sources; Two coaxially arranged intermediate shafts, each connected to the output shaft of a corresponding power source via a transmission sleeve; Common power output components; A transmission mechanism is provided between each intermediate shaft and the power output element; and A power coupling element is connected between the ends of two intermediate shafts, the power coupling element being configured to synchronize the rotational motion of the two intermediate shafts.

[0006] In one embodiment, the dynamic coupling element is made of a rigid or elastic material.

[0007] In one embodiment, the power coupling element is a spline sleeve; spline teeth are formed on both sides of the spline sleeve in the axial direction, and spline teeth are formed on the end of each intermediate shaft, and the spline teeth on the end of each intermediate shaft engage with the corresponding spline teeth in the spline sleeve.

[0008] In one embodiment, the power coupling element is a spline sleeve; the spline sleeve is fixed at a first axial end to the end of an intermediate shaft located on a first axial side, the spline sleeve is open at a second axial end and forms an inner hole extending from the second axial end into the spline sleeve, spline teeth are formed in the inner hole, spline teeth are formed on the end of the intermediate shaft on the second axial side, and the spline teeth on the end of the intermediate shaft on the second axial side engage with the spline teeth in the spline sleeve.

[0009] In one embodiment, the power coupling element is a keyed sleeve; keyways are formed on both sides of the keyed sleeve along the axial direction, and a key is provided at the end of each intermediate shaft, with the key at the end of each intermediate shaft engaging with the corresponding keyway in the keyed sleeve.

[0010] In one embodiment, the power coupling element is a keyed sleeve; the keyed sleeve is fixed at a first axial end to the end of an intermediate shaft located on a first axial side, the keyed sleeve is open at a second axial end and forms an inner hole extending from the second axial end into the keyed sleeve, a keyway is formed in the inner hole, a key is provided at the end of the intermediate shaft on the second axial side, and the key at the end of the intermediate shaft on the second axial side engages with the keyway in the keyed sleeve.

[0011] In one embodiment, the power coupling element is a keyless hub with a non-circular cross-section in its inner bore, and the end of each intermediate shaft has a non-circular cross-section that mates with the inner bore of the keyless hub.

[0012] In one embodiment, the power coupling element includes two flanges, each flange being fixed to the end of an intermediate shaft, and the two flanges are connected by bolts.

[0013] In one embodiment, each transmission mechanism is a planetary gear mechanism, including a sun gear mounted on a corresponding intermediate shaft, a plurality of planet gears supported by a planetary gear carrier, and a ring gear, with each planet gear meshing between the sun gear and the ring gear; the planetary gear carrier is fixed, and the ring gear is connected to the power output element; or, the ring gear is fixed, and the planetary gear carrier is connected to the power output element.

[0014] In one embodiment, each transmission mechanism is a gear train, including two or more gear sets.

[0015] In one embodiment, the ends of the two intermediate shafts are spaced apart by an axial distance, the axial distance being configured to ensure that the two intermediate shafts have mechanical connection strength that meets design requirements with respect to the power coupling element.

[0016] According to the input synchronization drive device of this application, the input motion of the two power sources is synchronized by using a power coupling element, so that the power transmitted from the two power sources to the drive element is balanced, reducing or even eliminating problems such as noise, vibration, wear, misalignment between the two sides, and even operation failure of the drive element. Attached Figure Description

[0017] The foregoing and other aspects of this application will be more fully understood through the following detailed description with reference to the accompanying drawings, in which: Figures 1-3 This is a topology diagram of some exemplary input synchronization drive devices of this application; Figure 4 This is a partial sectional front view of the specific structure of an input synchronization drive device according to this application; Figure 5 yes Figure 4 A cross-sectional view of the intermediate shaft in the input synchronous drive device; Figure 6 yes Figure 4 A cross-sectional view of the transmission sleeve in the input synchronous drive device; Figure 7 yes Figure 4 A cross-sectional view of the power coupling element in the input synchronous drive device; Figure 8 , Figure 9 This is a cross-sectional view of an alternative structure of the power coupling element that can be used in the input synchronous drive device of this application. Detailed Implementation

[0018] This application generally relates to an input synchronous drive device. This input synchronous drive device can be used in belt conveyors to form a head drive roller for driving the conveyor belt. Generally speaking, this input synchronous drive device has two rotating power sources, each transmitting its output power to a common power output element via its respective transmission mechanism (reduction mechanism). The input synchronous drive device of this application synchronizes the input motion of the two power sources through a power coupling element, thereby equalizing the power transmitted from both power sources to the drive element.

[0019] Depending on the type of transmission mechanism, the input synchronous drive device of this application can have various topologies. The following is based on... Figures 1-3 This application introduces several typical input synchronization drive devices.

[0020] See Figure 1 An exemplary input synchronous drive device of this application includes two rotating power sources 1 on both sides. These two power sources 1 can be electric motors, hydraulic motors, pneumatic motors, etc., and their power can be the same or different. When their power is different, the power source 1 with higher power can act as the primary power source, and the power source 1 with lower power can act as the secondary power source. When the drive device needs to output higher power, such as when the drive device starts up, or when the load driven by the drive device is large and the speed is high, both power sources 1 participate in the drive simultaneously. When the drive device needs to output lower power, such as when the drive device is running smoothly after startup, or when the load driven is small and the speed is low, only one power source 1 can participate in the drive. For example, normally the power source 1 with higher power participates in the drive, and in some special cases, the power source 1 with lower power participates in the drive.

[0021] Two power sources 1 are arranged axially opposite each other, their output shafts 2 face each other, and the output shafts 2 are arranged approximately coaxially with the common power output element 10.

[0022] The output shaft 2 of each power source 1 transmits power to the output element 10 via a transmission mechanism. Figure 1 The transmission mechanism shown is a planetary gear mechanism. The input end of each planetary gear mechanism is an intermediate shaft 3. The intermediate shaft 3 is connected to the output shaft 2 through a transmission sleeve 4. The ends of the two intermediate shafts 3 are coaxial and face each other, and the ends of the two intermediate shafts 3 are connected by a power coupling element 5. The power coupling element 5 forces the two intermediate shafts 3 to rotate at the same speed, that is, the power coupling element 5 rotates at the same speed as the two intermediate shafts 3, realizing the synchronous coupling of the two intermediate shafts 3.

[0023] A short axial distance is spaced between the ends of the two intermediate shafts 3. This axial distance ensures that the ends of the two intermediate shafts 3 do not come into contact, and also ensures that the mechanical connection strength between the two intermediate shafts 3 and the power coupling element 5 meets the design requirements.

[0024] Each planetary gear mechanism includes a sun gear (driving gear) 6 fixedly mounted on an intermediate shaft 3, multiple planet gears 8 supported by a planet carrier 7, and a ring gear 9. Each planet gear 8 meshes between the sun gear 6 and the ring gear 9. The planet carrier 7 is fixed. The ring gear 9 serves as the output end of the transmission mechanism. Two ring gears 9 are coaxially facing each other and separated by a predetermined axial distance. A power output element 10, such as a drive roller, is fixed to these two ring gears 9 at both axial ends.

[0025] When the two power sources 1 start and rotate, the rotational power output from their output shafts 2 is transmitted to the intermediate shaft 3 via the transmission sleeve 4, and then from the intermediate shaft 3 to their respective gear rings 9 via the planetary gear mechanism. The two gear rings 9 drive the power output element 10 to rotate. The two intermediate shafts 3 are coupled together by the power coupling element 5, so that the rotational speeds of the two intermediate shafts 3 are the same, thus achieving synchronization.

[0026] When any one power source 1 starts and rotates while the other power source 1 is not started, the rotational power output from the output shaft 2 of the started power source 1 is transmitted to the intermediate shaft 3 via the transmission sleeve 4, and then from the intermediate shaft 3 to the gear ring 9 via the planetary gear mechanism. The gear ring 9 itself drives the power output element 10 to rotate. At the same time, the intermediate shaft 3 on the side of the started power source 1 drives the intermediate shaft 3 on the side of the non-started power source 1 via the power coupling element 5. The intermediate shaft 3 on the side of the non-started power source 1 drives the output shaft 2 of the non-started power source 1 via the transmission sleeve 4, thus dragging the non-started power source 1 to idle.

[0027] Because a planetary gear mechanism is a two-degree-of-freedom mechanism, one of its three basic components (sun gear, planet carrier, and ring gear) needs to be fixed to achieve single-degree-of-freedom power transmission from the input to the output. Figure 1 In the example shown, the planet carrier 7 is fixed, the sun gear 6 serves as the input, and the ring gear 9 serves as the output. According to a modification, see [reference needed]. Figure 2 In the exemplary topology shown, in each planetary gear mechanism, the ring gear 9 is fixed, the sun gear 6 serves as the input end, and the planet carrier 7 serves as the output end. The two planet carriers 7 are coaxially facing each other and separated by a predetermined axial distance. The power output element 10 is fixed to these two planet carriers 7 at both axial ends. Figure 2 The transmission ratio (reduction ratio) of the planetary gear mechanism in the diagram is related to... Figure 1 The transmission ratios (reduction ratios) of planetary gear mechanisms in the models are different. Figure 2 The drive unit shown is otherwise similar to Figure 1 The drive devices shown are the same or similar, especially in that they also achieve synchronous coupling between the two intermediate shafts 3 through the power coupling element 5, which will not be described again here.

[0028] According to another exemplary input synchronization drive device of this application, such as Figure 3 As shown, the transmission mechanism on each side is a gear system consisting of two gear sets, including a driving gear 6 fixedly mounted on an intermediate shaft 3, a first intermediate gear 11 and a second intermediate gear 12 mounted on a fixed shaft, and a gear ring 9. The driving gear 6 meshes with the first intermediate gear 11 to form the first gear set, and the second intermediate gear 12 meshes with the gear ring 9 to form the second gear set. The two gear sets achieve a set transmission ratio (reduction ratio). The gear ring 9 serves as the output end of the transmission mechanism. The power output element 10 is fixed axially at both ends to the gear rings 9 on both sides. The intermediate shafts 3 on both sides are synchronously coupled through a power coupling element 5. The gear transmission mechanism can also be constructed to include three or more gear sets. Figure 3 The drive unit shown is otherwise similar to Figure 1 The drive devices shown are the same or similar, and will not be described again here.

[0029] Those skilled in the art will understand that the transmission mechanism in the drive device of this application can employ other forms of reduction gears. Furthermore, the specific type of transmission mechanism may affect the layout of various components. For example, in Figures 1-3 In the example shown, the output shafts 2 of the two power sources 1 are arranged approximately coaxially with the common power output element 10. Depending on the type of transmission mechanism, such as when using a helical gear or worm gear transmission mechanism, the central axis of the output shafts 2 of the two power sources 1 can be perpendicular to or at a non-right angle to the central axis of the output element 10.

[0030] Figure 4 The image illustrates an exemplary specific structure of the driving device of this application. This structure is also applicable to... Figure 1 , Figure 3 The topology shown, therefore in Figure 4 The specific structure of the planetary gear mechanism is not shown; only partial cross-sections are used to illustrate the components that embody the key concepts of this application. For those skilled in the art, the specific structure of the planetary gear mechanism is easily designed.

[0031] See Figure 4The diagram shows two motors 1 serving as power sources, with their output shafts 2 connected to intermediate shafts 3 via transmission sleeves 4. The two intermediate shafts 3 are synchronously coupled via a power coupling element 5. Each intermediate shaft 3 has a driving gear (sun gear) 6 mounted approximately at its center. The output shafts 2 of each motor 1, the associated transmission sleeves 4, the axially outer portion of the intermediate shaft 3, the bearings 6, and the transmission mechanism (except for the gear ring 9) are arranged within a housing 13. The housing 13 is located axially inside the gear ring 9, and both the housing 13 and the motors 1 are fixed. The gear ring 9 is located radially outside the motor 1. The housing 13 has end caps 14 positioned axially inside the housing, perpendicular to the axial direction. The axially inner portion of the intermediate shaft 3 extends through the central hole of the end cap 14 and connects to the power coupling element 5. The central hole of the end cap 14 houses a bearing 15 supporting the intermediate shaft 3 and a sealing ring that seals the intermediate shaft 3. This sealing ring seals the gear oil within the housing 13. The two end caps 14 face each other axially, with the power coupling element 5 exposed between them. The power output element, not shown, can be mounted on the two gear rings 9.

[0032] Figure 4 An exemplary specific structure of the intermediate shaft 3 shown is shown below. Figure 5 The intermediate shaft 3 is a splined shaft, having a shaft body 30, an outer end spline tooth 31 formed at the outer axial end of the shaft body 30, an inner end spline tooth 32 formed at the inner axial end of the shaft body 30, and a key 33 formed approximately in the middle of the shaft body 30. The key 33 is used to mate with a keyway in the shaft hole of the drive wheel 6 to mount the drive wheel 6 onto the intermediate shaft 3.

[0033] Figure 4 An exemplary specific structure of the transmission sleeve 4 shown is described in [reference needed]. Figure 6 The transmission sleeve 4 has a cylindrical body 40, inside which are formed axially outer splines 41 and axially inner splines 42. The axially outer splines 41 and axially inner splines 42 are separated by an internal annular groove 43 of the cylindrical body 40 to facilitate machining of the splines on both sides. The output shaft 2 of the motor 1 is inserted into the transmission sleeve 4 from the axially outer side, and the axially outer splines 41 engage with the splines on the output shaft 2. The axially outer end of the intermediate shaft 3 is inserted into the transmission sleeve 4 from the axially inner side, and the axially inner splines 42 engage with the outer end splines 31 of the intermediate shaft 3.

[0034] Figure 4 An exemplary specific structure of the power coupling element 5 shown is shown below. Figure 7The power coupling element 5 is a spline sleeve with a cylindrical body 50. Inside the cylindrical body 50 are formed first-side spline teeth 51 on a first axial side and second-side spline teeth 52 on a second axial side. The first-side spline teeth 51 and second-side spline teeth 52 are separated by an internal annular groove 53 of the cylindrical body 50 to facilitate machining of the spline teeth on both sides. Each protrusion 54 of the first-side spline teeth 51 and second-side spline teeth 52 has a notch 55 near the annular groove 53 to avoid stress concentration between the first-side spline teeth 51 and second-side spline teeth 52. The end of the intermediate shaft 3 on the first axial side is inserted into the power coupling element 5 via the first axial side, and the first-side spline teeth 51 engage with the inner end spline teeth 32 of the intermediate shaft 3. The end of the intermediate shaft 3 on the second axial side is inserted into the power coupling element 5 via the second axial side, and the second-side spline teeth 52 engage with the inner end spline teeth 32 of the intermediate shaft 3.

[0035] The synchronous coupling between the two intermediate shafts 3 is achieved through the power coupling element 5, which forces the two intermediate shafts to rotate at the same rotational speed, ensuring that the input motion from the two power sources 1 is synchronized, and avoiding various problems caused by the unbalanced load on both sides of the power output element 10, such as noise, vibration, wear, misalignment between the two sides, and even operation failure.

[0036] Understandable. Figure 4 The structure shown in the image can also be adapted to other applications. Figure 2 The transmission mechanism shown employs a gear system, and those skilled in the art can easily design the specific structure of the gear system, so it will not be described in detail here.

[0037] In addition, the power coupling element 5 can also adopt other specific structures.

[0038] For example, in Figure 8 In the example shown, the power coupling element 5 is a keyed sleeve. Keyways 13 are formed on both axial sides within the keyed sleeve, separated by an internal annular groove 15. There are one or more keyways 13 on each side. A corresponding key 14 is provided at the end of each intermediate shaft 3, and the key 14 is inserted into the keyway 13 within the keyed sleeve, thus achieving synchronous coupling between the two intermediate shafts 3.

[0039] For example, in Figure 9 In the example shown, the power coupling element 5 is a keyed sleeve. One axial end of the keyed sleeve is fixed to the end of one intermediate shaft 3. The other axial end of the keyed sleeve is open and forms an inner hole extending from the other axial end into the keyed sleeve, in which a keyway 13 is formed. The end of the other intermediate shaft 3 is equipped with a key 14, which is inserted into the keyway 13, and the keyed sleeve achieves synchronous coupling between the two intermediate shafts 3.

[0040] for Figure 7 The splined sleeve shown can also be fixed at one axial end to the end of one side intermediate shaft 3. The splined sleeve is open at the other axial end and forms an inner hole extending from the other axial end into the splined sleeve, in which spline teeth are formed. The end of the other side intermediate shaft 3 is equipped with spline teeth, which engage with the spline teeth in the splined sleeve to achieve synchronous coupling between the two intermediate shafts 3.

[0041] As an example not shown, the power coupling element 5 is a keyless hub. The inner bore of the keyless hub has a non-circular cross-section, and the end of each intermediate shaft 3 has a mating non-circular cross-section. Synchronous coupling between the two intermediate shafts 3 is achieved through the mating of the non-circular cross-sections between the keyless hub and the end of the intermediate shaft 3.

[0042] As an example not shown, the power coupling element 5 is a flange fixed to the end of each intermediate shaft 3, and the two flanges are connected by bolts to achieve synchronous coupling between the two intermediate shafts 3.

[0043] In the previous examples, the dynamic coupling element 5 was a rigid element, achieving rigid coupling between the two intermediate shafts 3. As an alternative, the dynamic coupling element 5 can be made of an elastic element, achieving elastic coupling between the two intermediate shafts 3.

[0044] Based on the principles of this application, other forms of power coupling elements 5 can also be used in the input synchronous drive device to achieve elastic coupling between the two intermediate shafts 3.

[0045] In the input synchronization drive device of this application, the two intermediate shafts 3 are connected by a power coupling element 5, which forces the two intermediate shafts 3 to rotate at the same speed, thereby realizing the synchronous input motion of the drive device. This can avoid various problems caused by the unbalanced load on both sides of the power output element 10, such as noise, vibration, wear, misalignment between the two sides, and even operation failure.

[0046] While this application has been described herein with reference to specific exemplary embodiments, the scope of this application is not limited to the details shown. Various modifications may be made to these details without departing from the basic principles of this application.

Claims

1. An input synchronous drive device, characterized in that... include: Two rotary power sources (1); Two coaxially arranged intermediate shafts (3), each intermediate shaft (3) is connected to the output shaft (2) of the corresponding power source (1) via a transmission sleeve (4); Common power output element (10); A transmission mechanism is provided between each intermediate shaft (3) and the power output element (10); as well as A power coupling element (5) is connected between the ends of two intermediate shafts (3), the power coupling element (5) being configured to synchronize the rotational motion of the two intermediate shafts (3).

2. The input synchronization drive device as described in claim 1, characterized in that, The power coupling element (5) is made of rigid or elastic material.

3. The input synchronization drive device as described in claim 1, characterized in that, The power coupling element (5) is a spline sleeve; The spline sleeve has spline teeth formed on both sides of the axial direction, and spline teeth are formed on the end of each intermediate shaft (3). The spline teeth on the end of each intermediate shaft (3) are engaged with the corresponding spline teeth in the spline sleeve.

4. The input synchronization drive device as described in claim 1, characterized in that, The power coupling element (5) is a spline sleeve; The spline sleeve is fixed at the end of the intermediate shaft (3) located on the first axial side at the first axial end. The spline sleeve is open at the second axial end and forms an inner hole extending from the second axial end into the spline sleeve. Spline teeth are formed in the inner hole. Spline teeth are formed on the end of the intermediate shaft (3) on the second axial side. The spline teeth on the end of the intermediate shaft (3) on the second axial side engage with the spline teeth in the spline sleeve.

5. The input synchronization drive device as described in claim 1, characterized in that, The power coupling element (5) is a keyed connecting sleeve; The keyed sleeve has keyways formed on both sides of the axial direction, and a key is provided at the end of each intermediate shaft (3). The key at the end of each intermediate shaft (3) is engaged with the corresponding keyway in the keyed sleeve.

6. The input synchronization drive device as described in claim 1, characterized in that, The power coupling element (5) is a keyed connecting sleeve; The keyed sleeve is fixed at the first axial end to the end of the intermediate shaft (3) located on the first axial side. The keyed sleeve is open at the second axial end and forms an inner hole extending from the second axial end into the inside of the keyed sleeve. A keyway is formed in the inner hole. A key is provided at the end of the intermediate shaft (3) on the second axial side. The key at the end of the intermediate shaft (3) on the second axial side engages with the keyway in the keyed sleeve.

7. The input synchronization drive device as described in claim 1, characterized in that, The power coupling element (5) is a keyless hub, the inner hole of the keyless hub has a non-circular cross-section, and the end of each intermediate shaft (3) has a non-circular cross-section that mates with the inner hole of the keyless hub. Alternatively, the power coupling element (5) includes two flanges, each of which is fixed to the end of an intermediate shaft (3), and the two flanges are connected by bolts.

8. The input synchronous drive device as described in any one of claims 1-7, characterized in that, Each transmission mechanism is a planetary gear mechanism, including a sun gear (6) mounted on a corresponding intermediate shaft (3), a plurality of planet gears (8) supported by a planet gear carrier (7), and a gear ring (9), with each planet gear (8) meshing between the sun gear (6) and the gear ring (9); The planetary gear carrier (7) is fixed, and the gear ring (9) is connected to the power output element (10); or, the gear ring (9) is fixed, and the planetary gear carrier (7) is connected to the power output element (10).

9. The input synchronous drive device as described in any one of claims 1-7, characterized in that, Each transmission mechanism is a gear system, including two or more gear sets.

10. The input synchronous drive device as described in any one of claims 1-7, characterized in that, An axial distance is spaced between the ends of the two intermediate shafts (3), the axial distance being set to ensure that the two intermediate shafts (3) have mechanical connection strength that meets design requirements with respect to the power coupling element (5).

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