A one-way clutch assembly employing a split reduction gear ring

Abstract

The application relates to the technical field of engine starting systems and discloses a one-way device assembly adopting a split type reduction gear ring, which comprises a transmission assembly and a triggering assembly; the transmission assembly comprises an armature, a reduction gear ring, a planetary gear set and a planetary shaft; the planetary gear set is connected with the armature and the reduction gear ring respectively and is arranged on the planetary shaft; torque provided by the armature is transmitted to the planetary shaft; wherein the reduction gear ring comprises a gear ring baffle, a gear ring and a buffer; the gear ring is embedded in the gear ring baffle through limiting structure, and the buffer is clamped between the gear ring and the gear ring baffle; the triggering assembly comprises a driving device and a one-way device; the one-way device is arranged on the planetary shaft; and the driving device drives the one-way device to be separably connected with an engine flywheel. The one-way device assembly of the related art has the technical problems that the one-way device assembly has an integrated structure which is difficult to disassemble and the split type structure has insufficient limiting reliability.

Description

Technical Field

[0001] This invention relates to the field of engine starting system technology, and in particular to a one-way valve assembly employing a split-type reduction gear ring. Background Technology

[0002] In the prior art, the reduction gear ring of the starter's one-way gear assembly is a structure used to transmit torque between the armature shaft and the drive shaft. It is mostly an integrated structure or a split design. The integrated structure is difficult to disassemble and assemble, and the whole structure needs to be replaced during maintenance, which is costly and inefficient. In the split structure, the limiting reliability of the gear ring and the retaining sleeve is insufficient, and relative rotation is prone to occur, which affects the transmission accuracy. Moreover, it is easy to generate abnormal noise or cause component fatigue damage due to vibration during operation. Summary of the Invention

[0003] This application discloses a one-way decelerator assembly using a split-type reduction gear ring, in order to solve the technical problems in related technologies where the reduction gear ring of the one-way decelerator assembly has difficulties in disassembly and assembly due to its integrated structure, and insufficient reliability of its limiting function due to its split structure.

[0004] To solve the above problems, the present invention adopts the following technical solution: A one-way gear assembly employing a split-type reduction gear ring includes: The transmission assembly includes an armature, a reduction gear ring, a planetary gear set, and a planetary shaft; the planetary gear set is connected to the armature and the reduction gear ring respectively, and is disposed on the planetary shaft; the torque provided by the armature is transmitted to the planetary shaft; The deceleration gear ring includes a gear ring retainer, a gear ring, and a buffer component; the gear ring is embedded in the gear ring retainer through a limiting structure, and the buffer component is sandwiched between the gear ring and the gear ring retainer. The triggering component includes a drive unit and a one-way valve; the one-way valve is located on the planetary shaft; the drive unit drives the one-way valve to be detachably connected to the engine flywheel.

[0005] Optionally, the gear ring retainer is connected to the starter housing via a limiting member; the gear ring retainer has an installation chamber for installing the gear ring, buffer, and planetary gear set, and the other end of the gear ring retainer has a through hole; one end of the planetary shaft passes through the through hole and is connected to the planetary gear set.

[0006] Optionally, a mounting bracket is provided at one end of the planetary shaft; the planetary gear set includes several gears, which are rotatably mounted on the mounting bracket and respectively mesh with the armature teeth of the gear ring and the armature.

[0007] Optionally, the mounting chamber has an opening at one end near the armature; the limiting structure includes a groove on the side wall of the mounting chamber and a boss on the outer side wall of the gear ring, the boss being embedded in the groove to limit the circumferential rotation of the gear ring.

[0008] Optionally, the buffer is an annular washer; the outer wall of the annular washer is provided with a protrusion corresponding to the groove; the annular washer is placed in the mounting chamber, the protrusion is correspondingly embedded in the groove, and one side of the protrusion abuts against the toothed ring.

[0009] Optionally, the one-way device includes a starter gear and a bushing; the bushing is keyed to the planetary shaft; the starter gear is located at one end of the bushing; when the starter gear meshes with the flywheel, the planetary shaft rotates, driving the bushing and the starter gear to rotate, causing the flywheel to rotate.

[0010] Optionally, the connection between the bushing and the planetary shaft is provided with a helical spline; when the drive device drives the bushing to move along the planetary shaft, the bushing rotates around the axis along the helical spline.

[0011] Optionally, the one-way device may also include a clutch located at the connection between the starter gear and the bushing. The clutch is configured to separate the starter gear from the bushing when the starter gear exceeds a certain speed driven by the flywheel.

[0012] Optionally, the planetary shaft is also equipped with a retaining ring to limit the maximum sliding distance of the bushing and prevent the bushing from disengaging from the helical spline under the drive of the drive device.

[0013] The technical solution adopted in this invention can achieve the following beneficial effects: 1. The reduction gear ring adopts a separate structure of gear ring retainer, gear ring and buffer component, which can be disassembled and replaced separately to reduce maintenance costs; the buffer component is sandwiched between the gear ring and retainer to effectively absorb vibration, eliminate abnormal noise, reduce component wear and extend service life; through the groove of the gear ring retainer and the boss of the gear ring, the circumferential rotation of the gear ring is precisely restricted to ensure transmission accuracy and reduce impact wear on the tooth surface; 2. The bushing and planetary shaft are connected by a helical spline, allowing the one-way device to rotate synchronously circumferentially during axial movement. This ensures precise alignment of the tooth surfaces when the starting gear and flywheel mesh, reducing jamming and impact, and improving meshing reliability. Furthermore, the clutch between the starting gear and bushing allows for the disconnection of reverse power transmission when the flywheel speed exceeds that of the starting gear, preventing damage to the one-way device and transmission components due to reverse drive and protecting system safety. The retaining ring on the planetary shaft limits the maximum sliding distance of the bushing, preventing it from disengaging from the helical spline and ensuring reliable connection between the one-way device and the planetary shaft throughout the driving process, thus preventing starting failure. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1This is a schematic cross-sectional view of the overall structure disclosed in some embodiments of this application; Figure 2 This is a cross-sectional schematic diagram of a one-way valve; Figure 3 This is a cross-sectional view of the planetary axis; Figure 4 This is a cross-sectional view of the gear ring retainer; Figure 5 This is a schematic diagram of one side of the gear ring retainer; Figure 6 This is a schematic diagram of one side of the buffer component; Figure 7 This is a cross-sectional view of the buffer component; Figure 8 This is a schematic diagram of one side of the gear ring; Figure 9 This is a cross-sectional view of the gear ring.

[0015] In the diagram: 101-gear ring retainer, 1011-mounting chamber, 1012-groove, 1013-through hole, 102-gear ring, 1021-tooth surface, 1022-bore, 103-buffer, 1031-protrusion, 201-planetary shaft, 202-mounting bracket, 203-mounting post, 204-retaining ring, 205-first helical spline, 206-planetary gear, 207-positioning groove, 301-shaft sleeve, 302-starting gear, 303-second helical spline, 3041-roller, 3042-spring. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0017] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0018] Due to the technical problems of existing reduction gear rings, such as the difficulty in disassembling and assembling a one-piece structure and the insufficient reliability of the limiting mechanism in a split structure, it is necessary to design a design that facilitates replacement and disassembly, and during operation, provides effective buffering while reducing abnormal noise and vibration between detachable parts. The following is in conjunction with the appendix Figures 1 to 9 This application provides a detailed description of a one-way gear assembly using a split-type reduction gear ring through specific embodiments and application scenarios.

[0019] like Figure 1 As shown, this utility model discloses a one-way gear assembly using a split-type reduction gear ring, comprising two core parts: a transmission component and a trigger component. The two work together to realize the engine starting function. The transmission component is responsible for transmitting the armature power to the output end after deceleration and torque amplification, while the trigger component is responsible for controlling the engagement and disengagement of the starter gear 302 with the flywheel and realizing one-way transmission protection. The transmission assembly is the core of power transmission, used to convert the high speed and low torque of the armature into low speed and high torque and transmit it to the planetary shaft 201. It includes the armature, reduction gear ring, planetary gear set and planetary shaft 201. It should be noted that the armature is the drive component of the existing starter motor, not shown in the figure. Its output end is provided with armature teeth. Specifically, the armature teeth are external teeth distributed circumferentially around the axis of the armature shaft, which are used to mesh with the planetary gear set to transmit torque. The armature is used to provide initial power and transmits rotational torque to the planetary gear set through the armature teeth to drive the entire transmission assembly to operate. like Figure 4-9 As shown, the reduction gear ring is a split structure and is a fixed meshing component of the planetary gear set, including a gear ring retainer 101, a gear ring 102, and a buffer 103. The gear ring retainer 101 is a cylindrical structure with one end open, and is fixedly connected to the starter housing by a limiting member. Its inner side forms an installation chamber 1011 for accommodating the gear ring 102, the buffer 103, and the planetary gear set. The end of the gear ring retainer 101 away from the opening has a through hole 1013 for the planetary shaft 201 to pass through, providing support for the planetary shaft 201. The gear ring retainer 101 serves as the basic load-bearing structure of the reduction gear ring, providing installation space and positioning reference for internal components. At the same time, it is fixed to the starter housing by the limiting member to ensure the overall positional stability during transmission. The gear ring 102 is annular, with a tooth surface 1021 on the inner side wall that meshes with the planetary gear set, and a boss 1022 protruding from the outer side wall. The tooth surface 1021 meshes with the planetary gear set, serving as a fixed gear ring 102 to limit the revolution trajectory of the planetary gear 206, and working with the planetary gear set to achieve speed reduction and torque increase. The boss 1022 cooperates with the groove 1012 of the gear ring retainer 101 to achieve circumferential positioning. The buffer 103 is an annular washer with a protrusion 1031 on its outer wall corresponding to the groove 1012 of the gear ring retainer 101. The material of the annular washer is preferably an elastic material (such as rubber). It is sandwiched between the gear ring 102 and the gear ring retainer 101. After the protrusion 1031 is embedded in the groove 1012, it absorbs the vibration during the transmission process through elastic deformation, reduces the rigid collision between the gear ring 102 and the retainer, and eliminates abnormal noise. At the same time, it fills the assembly gap and enhances the overall structural stability.

[0020] like Figure 5 and 6 As shown, in one embodiment, the limiting structure consists of a groove 1012 on the side wall of the mounting chamber 1011 of the gear ring retainer 101 and a boss 1022 on the gear ring 102. The boss 1022 is embedded in the groove 1012; it restricts the circumferential rotation of the gear ring 102 relative to the gear ring retainer 101, avoids transmission misalignment caused by the rotation of the gear ring 102 when the planetary gear set meshes, and ensures a stable reduction ratio.

[0021] like Figure 1 and 3 As shown, in one embodiment, the planetary gear set includes a plurality of planetary gears 206 (preferably three in this embodiment, evenly distributed circumferentially) and a mounting frame 202. Each planetary gear 206 is rotatably connected to the mounting frame 202 via a mounting post 203 disposed on the mounting frame 202, and simultaneously meshes with the armature gear and the tooth surface 1021 of the gear ring 102. Specifically, the planetary gear set, as the core component of the reduction transmission, converts the rotational motion of the armature into its own rotation and revolution by meshing with the armature teeth and the gear ring 102, thereby driving the mounting frame 202 and the planetary shaft 201 to rotate, achieving the effect of speed reduction and torque increase.

[0022] like Figure 1 and 3 As shown, in one embodiment, the planetary shaft 201 is a stepped cylinder, one end of which is fixedly connected to the mounting bracket 202 of the planetary gear set, and the other end extends through the through hole 1013 of the gear ring retainer 101 to the trigger assembly; the shaft body is provided with a first helical spline 205 and a retaining ring 204, with the retaining ring 204 disposed at the end near the trigger assembly; Specifically, the planetary shaft 201 serves as the power output shaft, transmitting the torque from the planetary gear set to the trigger assembly; the first helical spline 205 provides helical guidance for the movement of the one-way device, and the retaining ring 204 limits the maximum sliding distance of the one-way device to prevent it from disengaging from the planetary shaft 201.

[0023] like Figure 1 and 2As shown, in one embodiment, the triggering component is used to control the engagement and disengagement of the starting gear 302 with the flywheel and to achieve one-way transmission protection. It includes a drive device and a one-way device. The drive device is an existing electromagnetic drive mechanism, not shown in the figure. Its output end is connected to the one-way device, preferably through a shift fork. It should be noted that the connection through a shift fork is a common connection method used by those skilled in the art and is not the main improvement point of this embodiment. It will not be described in detail here. Specifically, after receiving the start signal, the drive unit generates axial thrust, which drives the one-way device to move axially along the planetary shaft 201, thereby achieving the meshing of the start gear 302 with the flywheel; after the start is completed, it resets and drives the one-way device to disengage.

[0024] like Figure 2 As shown, in one embodiment, the one-way device includes a starter gear 302, a bushing 301, and a clutch; the bushing 301 is cylindrical, and its inner sidewall is provided with internal helical teeth that are adapted to the helical spline of the planetary shaft 201, and is sleeved on the planetary shaft 201 by a key connection; Specifically, the bushing 301, as the main structure of the one-way device, moves along the helical spline under the drive of the drive device. At the same time, due to the helical transmission, it rotates circumferentially, which drives the starting gear 302 to rotate synchronously, ensuring that the tooth surface 1021 is accurately aligned when meshing with the flywheel. The starting gear 302 is located at the end of the bushing 301 away from the planetary gear set, and its outer side wall is provided with external teeth that mesh with the engine flywheel. The starting gear 302 meshes with the flywheel through the external teeth, and transmits the torque transmitted by the planetary shaft 201 to the flywheel to drive the engine to start.

[0025] like Figure 2 As shown, the clutch is located at the connection between the starting gear 302 and the bushing 301, and preferably a roller-type one-way clutch is adopted, including a wedge groove on the bushing 301 and a roller 3041 on the hub of the starting gear 302; When the bushing 301 drives the starter gear 302 to rotate, the roller 3041 is clamped to the narrow end of the wedge groove, so that the roller 3041 abuts against the hub of the starter gear 302 to transmit torque; when the engine starts and the flywheel speed exceeds the starter gear 302, the roller 3041 slides to the wide end of the wedge groove, cutting off the torque transmission and preventing the transmission components from being overloaded and damaged. Specifically, a spring 3042 is provided on one side of the roller and connected to the wedge groove side to force the roller 3041 to abut against the hub of the starting gear 302, so that when the bushing 301 rotates, the starting gear 302 can be driven to rotate through the abutment between the roller 3041 and the hub of the starting gear 302.

[0026] Assembly and working process Assembly process: Transmission assembly: Place the buffer 103 into the mounting chamber 1011 of the gear ring retainer 101, so that the protrusion 1031 is embedded in the groove 1012; press the gear ring 102 into the mounting chamber 1011, so that the boss 1022 is embedded in the groove 1012 and abuts against the buffer 103; fix the planetary gear set mounting bracket 202 to the planetary shaft 201, and then install the whole into the mounting chamber 1011, so that each gear meshes with the armature gear and the gear ring 102 at the same time; fix the gear ring retainer 101 to the starter housing by the limiting member.

[0027] Trigger assembly: Install the clutch rollers into the wedge groove of the bushing 301, and then assemble the starter gear 302 with the bushing 301; fit the bushing 301 onto the planetary shaft 201 via a helical spline, and install the retaining ring 204; finally, connect the drive fork to the bushing 301.

[0028] Work process: Engagement stage: After the start signal is triggered, the drive device pushes the bushing 301 to move along the helical spline of the planetary shaft 201. The bushing 301 rotates synchronously under the action of helical transmission, driving the starter gear 302 to move and rotate at the same time, so that the external teeth are precisely engaged with the flywheel tooth groove (the retaining ring 204 limits the maximum movement distance to prevent disengagement).

[0029] Starting phase: The armature is energized and rotates, driving the planetary gear set to rotate through the armature teeth; since the gear ring 102 is fixed, the gears simultaneously revolve around the planetary shaft 201, driving the mounting bracket 202 and the planetary shaft 201 to rotate at low speed and high torque; the planetary shaft 201 drives the bushing 301 to rotate through the helical spline, the clutch rollers clamp and transmit torque, the starting gear 302 drives the flywheel to rotate, and the engine starts.

[0030] Separation phase: After the engine starts, the drive unit resets and pulls the bushing 301 to move in the opposite direction along the planetary shaft 201, and the starting gear 302 disengages from the flywheel; if the flywheel speed exceeds that of the starting gear 302, the clutch rollers slide to the wide end of the wedge groove, cutting off the reverse power and protecting the transmission components.

[0031] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0032] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A one-way derailleur assembly employing a split-type reduction gear ring, characterized in that, include: The transmission assembly includes an armature, a reduction gear ring, a planetary gear set, and a planetary shaft (201); the planetary gear set is connected to the armature and the reduction gear ring respectively, and is disposed on the planetary shaft (201); the torque provided by the armature is transmitted to the planetary shaft (201). The deceleration gear ring includes a gear ring retainer (101), a gear ring (102), and a buffer (103); the gear ring (102) is embedded in the gear ring retainer (101) through a limiting structure, and the buffer (103) is sandwiched between the gear ring (102) and the gear ring retainer (101). The triggering component includes a drive unit and a one-way valve; the one-way valve is disposed on the planetary shaft (201); the drive unit drives the one-way valve to be detachably connected to the engine flywheel.

2. The one-way gear assembly using a split-type reduction gear ring according to claim 1, characterized in that, The gear ring retainer (101) is connected to the starter housing via a limiting member; the gear ring retainer (101) has an installation chamber (1011) for installing the gear ring (102), the buffer (103) and the planetary gear set; the other end of the gear ring retainer (101) has a through hole (1013); one end of the planetary shaft (201) passes through the through hole (1013) and is connected to the planetary gear set.

3. A one-way gear assembly employing a split-type reduction gear ring according to claim 2, characterized in that, The planetary shaft (201) is provided with a mounting bracket (202) at one end; the planetary gear set includes several gears, which are rotatably mounted on the mounting bracket (202) and mesh with the gear ring (102) and the armature teeth of the armature respectively.

4. A one-way gear assembly employing a split-type reduction gear ring according to claim 3, characterized in that, The mounting chamber (1011) has an opening at one end near the armature; the limiting structure includes a groove (1012) on the side wall of the mounting chamber (1011) and a boss (1022) on the outer side wall of the gear ring (102), the boss (1022) being embedded in the groove (1012) to restrict the circumferential rotation of the gear ring (102).

5. A one-way gear assembly employing a split-type reduction gear ring according to claim 4, characterized in that, The buffer (103) is an annular washer; the outer side wall of the annular washer is provided with a protrusion (1031) corresponding to the groove (1012); the annular washer is placed in the mounting chamber (1011), the protrusion (1031) is correspondingly embedded in the groove (1012), and one side of the protrusion (1031) abuts against the toothed ring (102).

6. A one-way gear assembly employing a split-type reduction gear ring according to claim 1, characterized in that, The one-way device includes a starter gear (302) and a bushing (301); the bushing (301) is keyed and sleeved on the planetary shaft (201); the starter gear (302) is located at one end of the bushing (301); when the starter gear (302) meshes with the flywheel, the planetary shaft (201) rotates, driving the bushing (301) and the starter gear (302) to rotate, causing the flywheel to rotate.

7. A one-way gear assembly employing a split-type reduction gear ring according to claim 6, characterized in that, The connection between the bushing (301) and the planetary shaft (201) is provided with a helical spline; when the driving device drives the bushing (301) to move along the planetary shaft (201), the bushing (301) rotates around the axis along the helical spline.

8. A one-way gear assembly employing a split-type reduction gear ring according to claim 7, characterized in that, The one-way device also includes a clutch, which is disposed at the connection between the starting gear (302) and the bushing (301). The clutch is configured such that when the starting gear (302) exceeds a certain speed driven by the flywheel, the starting gear (302) separates from the bushing (301).

9. A one-way gear assembly employing a split-type reduction gear ring according to claim 8, characterized in that, The planetary shaft (201) is also provided with a retaining ring (204) to limit the maximum sliding distance of the bushing (301) and prevent the bushing (301) from disengaging from the helical spline under the drive of the drive device.

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