Gearbox clutch mechanism

Abstract

The present application relates to a kind of gearbox clutch mechanisms, including being arranged in the box body with the first shaft system and the second shaft system of at least 2 groups of gear pairs, first gear is fixedly arranged on the first shaft of first shaft system, second gear is rotatably arranged on the second shaft of second shaft system, and second gear is drivingly connected between second gear and second shaft by clutch mechanism arranged on the side of second gear, support seat is arranged in the box body, and second gear is rotatably arranged on support seat by bearing;Second gear is sleeved on second shaft, and floating gap is arranged between second gear and second shaft, so that second gear and second shaft are independently supported, to avoid the influence between second gear and second shaft when they rotate asynchronously.The second shaft and the second gear are gap fitted and independently supported in the present application, there is no contact between the second shaft and the second gear, and the inner and outer rings of the bearing always rotate relative to each other in the working state, so that the hammering effect of fixed position is not formed, thereby improving the service life of the bearing.

Description

Technical Field

[0001] This invention belongs to the field of gearbox technology, and particularly relates to a gearbox clutch mechanism. Background Technology

[0002] For high-speed wire rod and high-speed bar production lines, the wide range of product specifications and the significant differences in required rolling speeds for different specifications range from a few meters per second to hundreds of meters per second. Conventional motor speed regulation is insufficient to meet these speed requirements. Therefore, a gearbox is needed between the mill and motor in the high-speed wire rod and high-speed bar final rolling mill to achieve different speed ratio combinations to meet the rolling speed requirements of different product specifications. However, in existing gearboxes, the gear clutch mechanism, when the clutch is engaged, causes the gear in the working position to rotate synchronously with the floating bearing. While the floating bearing bears a load, its inner and outer rings and rolling elements are in a relatively stationary state. This periodic loading of the rolling elements produces a hammer-like effect, causing periodic impacts on the same position of the bearing's inner and outer rings. This leads to rapid bearing damage, uneven shifting, and gear slippage, severely affecting the stability and service life of the gearbox. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a gearbox clutch mechanism that improves the service life and operational stability of the gearbox clutch by changing the relatively stationary working state of the inner and outer rings of the floating bearing during clutch operation.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A gearbox clutch mechanism includes a first shaft system and a second shaft system having at least two sets of gear pairs disposed within a gearbox housing. Each gear pair includes a first gear and a second gear that are always meshed. The first gear is fixedly mounted on a first shaft of the first shaft system, and the second gear is rotatably mounted on a second shaft of the second shaft system. The second gear and the second shaft are connected by a clutch mechanism located on one side of the second gear. A support seat is provided within the gearbox housing, and the second gear is rotatably mounted on the support seat via a bearing. The second gear is fitted onto the second shaft, and a floating clearance is provided between the second gear and the second shaft, allowing the second gear and the second shaft to be independently supported, thus avoiding mutual interference when the second gear and the second shaft rotate asynchronously.

[0006] Furthermore, one end of the second gear is provided with a shift spline, and the clutch mechanism includes a spline sleeve and a driver. The spline sleeve is located on one side of the second gear and is always connected to the second shaft through a spline. The spline sleeve is axially slidingly engaged with the second shaft. The driver is connected to the spline sleeve, drives the spline sleeve to slide, and engages or disengages with the shift spline on the second gear.

[0007] Furthermore, both the spline sleeve and the shift spline are equipped with guide structures.

[0008] Furthermore, the shift spline and the second gear are either an integral structure or a separate combination structure.

[0009] Furthermore, a clutch mechanism is provided between two adjacent sets of gear pairs.

[0010] Furthermore, bearings are provided at both ends of the second gear, and both ends of the second gear are supported by support seats, or one end is supported by a support seat and the other end is supported by a housing, so as to achieve a compact arrangement.

[0011] Furthermore, the support base is provided with a bearing mounting hole, and the second gear is rotatably mounted in the bearing mounting hole through the bearing. A retaining ring for axial positioning is provided on the outer side of the bearing outer ring, and a spacer is provided between the outer ring of the bearing at one end of the second gear and the retaining ring. The axial clearance between the bearings is changed by adjusting the thickness of the spacer.

[0012] Furthermore, the two ends of the second shaft are rotatably mounted on the housing via bearings.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. In this invention, the gearbox clutch mechanism supports the second gear through an independent support seat. The second shaft and the second gear are fitted with a clearance and are supported independently. When the second shaft and the second gear rotate synchronously or asynchronously, there is no contact between the second shaft and the second gear. Furthermore, the independent support structure of the bearing allows the inner and outer rings of the bearing to rotate relative to each other during operation, preventing the formation of a fixed-position hammering effect and thus improving the service life of the bearing.

[0015] 2. The independent support structure of the second shaft and the second gear in this invention can effectively ensure the coaxiality of the inner and outer splines. During the shifting process, the spline sleeve will not tilt when moving axially, reducing shifting resistance and making shifting smoother. At the same time, it can reduce the risk of clutch disengagement.

[0016] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the overall gearbox clutch mechanism in this invention.

[0019] Figure 2 for Figure 1 Enlarged view of section I in the middle.

[0020] Figure 3 for Figure 1 Enlarged view of section III in the middle.

[0021] Figure 4 for Figure 1 Sectional view of AA.

[0022] Figure 5 This is a compact structure for the gearbox clutch mechanism in this invention.

[0023] Figure 6 for Figure 5 Enlarged view of section II in the middle. Detailed Implementation

[0024] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0026] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] Example 1

[0028] Please see Figures 1-4 A gearbox clutch mechanism includes a first shaft system 1 and a second shaft system 2, each with two sets of gear pairs meshing simultaneously. Each gear pair includes a first gear and a second gear that are always meshed. The first gear is fixedly mounted on a first shaft 1-3 of the first shaft system 1, and the second gear is rotatably mounted on a second shaft 2-4 of the second shaft system 2. The second gear and the second shaft are connected by a clutch mechanism mounted on one side of the second gear. The two first gears on the first shaft system 1 are gear 1-1 and gear 1-2, and the two second gears on the second shaft system 2 are gear 2-1 and gear 2-2. Gear 1-1 and gear 2-1 are always meshed, and gear 1-2 and gear 2-2 are always meshed.

[0029] In this embodiment, gear 2-1 on the second shaft system 2 is independently mounted on support seats 3-1a and 3-1b via bearings 2-1a and 2-1b, and gear 2-2 is independently mounted on support seats 3-1c and 3-1d via bearings 2-2a and 2-2b. A floating clearance is provided between the inner holes of gear 2-1 and gear 2-2 and the second shaft 2-4 to avoid mutual interference between the gears and the shaft when they rotate asynchronously.

[0030] In this embodiment, the outer rings of bearings 2-1a and 2-1b are installed in the bearing mounting holes 3-1f of the support 3-1, and the journals at both ends of gear 2-1 are installed in the inner holes of bearings 2-1a and 2-1b, so that the gear can be independently supported by the bearings.

[0031] Among them, retaining rings 2-1a1 and 2-1b1 are respectively installed on the outer side of the outer ring of bearing 2-1a and bearing 2-1b for axial fixation of bearing. A spacer ring 2-1b2 is installed between the outer ring of bearing 2-1b and retaining ring 2-1b1 on one side. The axial clearance between bearing 2-1a and bearing 2-1b can be changed by adjusting the thickness of spacer ring 2-1b2.

[0032] In this embodiment, the clutch mechanism includes a spline sleeve 4 and a driver. Gears 2-1 and 2-2 on the second shaft system 2 are respectively provided with external splines 2-1c and 2-2c. An external spline 2-4a is provided in the middle of the second shaft 2-4. The spline sleeve 4 is fitted onto the second shaft system 2. The internal spline 4-1 on the spline sleeve 4 is always engaged with the external spline 2-4a and can move axially. When the internal spline on the spline sleeve 4 simultaneously engages with the external spline 2-1c on gear 2-1 and the external spline 2-4a on the second shaft 2-4, gear 2-1 rotates synchronously with the second shaft 2-4. When the internal spline on the spline sleeve 4 simultaneously engages with the external spline 2-2c on gear 2-2 and the external spline 2-4a on the second shaft 2-4, gear 2-2 rotates synchronously with the second shaft 2-4.

[0033] In this invention, the support base 3-1 is arranged inside the housing 3 and has a split structure to facilitate the installation of the second shaft system 2.

[0034] Example 2

[0035] Please see Figure 5 , 6 The difference between this embodiment and Embodiment 1 is that the two support seats 3-1 used to support bearings 2-1a and 2-1b, specifically the outer support seats 3-1a and 3-1d, can be eliminated. The outer bearings are then installed in the holes 3-2a on the housing 3 via bearing seats 3-3, thus supporting gears 2-1 and 2-2. In this case, the bearings 3-4 at both ends of the second shaft system 2, used to support the second shaft 2-4, can be installed in the holes 3-2a via independent bearing seats 3-3, thereby shortening the length of the second shaft system 2 and the housing 3, achieving a compact arrangement.

[0036] In this embodiment, the external splines 2-1c and 2-2c at both ends of gear 2-1 and gear 2-2 can be configured as separate structures from the gears, that is, an independent pressure sleeve 2-3 is provided, the outer ring of which is provided with external splines 2-3a. The pressure sleeve 2-3 is connected to the end of gear 2-2 to realize the transmission of power. That is, when the splines on the pressure sleeve 2-3 are worn, only the pressure sleeve 2-3 needs to be replaced, while the gear can still be used, thereby avoiding the passive replacement of the gear due to spline wear.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A gearbox clutch mechanism, comprising a first shaft system and a second shaft system having at least two sets of gear pairs disposed within a gearbox housing, wherein the gear pairs include a first gear and a second gear that are always meshed, the first gear being fixedly disposed on a first shaft of the first shaft system, and the second gear being rotatably disposed on a second shaft of the second shaft system, the second gear and the second shaft being connected by a clutch mechanism disposed on one side of the second gear, characterized in that: The housing is equipped with a support base, and the second gear is rotatably mounted on the support base via a bearing; the second gear is fitted onto the second shaft, and a floating clearance is provided between the second gear and the second shaft, so that the second gear and the second shaft are independently supported. One end of the second gear is provided with a shift spline. The clutch mechanism includes a spline sleeve and a driver. The spline sleeve is located on one side of the second gear and is always connected to the second shaft through a spline. The spline sleeve is axially slidingly engaged with the second shaft. The driver is connected to the spline sleeve and drives the spline sleeve to slide, and engage or disengage with the shift spline on the second gear. The second gear has bearings at both ends, and both ends of the second gear are supported by support seats, or one end is supported by a support seat and the other end is supported by a housing. The support seat has bearing mounting holes, and the second gear is rotatably mounted in the bearing mounting holes through the bearings. A retaining ring for axial positioning is provided on the outer side of the bearing outer ring, and a spacer is provided between the outer ring of the bearing at one end of the second gear and the retaining ring. The axial clearance between the bearings is changed by adjusting the thickness of the spacer.

2. The gearbox clutch mechanism according to claim 1, characterized in that: Both the spline sleeve and the shift spline are equipped with guide structures.

3. The gearbox clutch mechanism according to claim 1, characterized in that: The shift spline and the second gear are either an integral structure or a separate combination structure.

4. The gearbox clutch mechanism according to claim 1, characterized in that: A clutch mechanism is provided between two adjacent sets of gear pairs.

5. The gearbox clutch mechanism according to claim 1, characterized in that: The two ends of the second shaft are rotatably mounted on the housing via bearings.

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