A vibration-damping gear configuration

Abstract

The present application relates to gear damping technology field, a kind of damping gear structure, including hollow shaft, the outer gear ring of being sleeved in the outside of hollow shaft and being coaxially arranged with hollow shaft, and elastic damping damping unit between hollow shaft and outer gear ring;The clearance fit between the hollow shaft and the outer gear ring and the side of mutual approach forms multiple installation cavities for installing elastic damping damping unit;The elastic damping damping unit respectively with outer gear ring, hollow shaft abuts.This application has good damping effect, does not occupy space;It can effectively compensate the instantaneous speed variation;When transmitting torque changes, it can rely on elastic damping damping unit to absorb torsional vibration energy, so as to achieve the effect of reducing gear vibration.

Description

TECHNICAL FIELD

[0001] The present application relates to the rack and pinion transmission field, more particularly to a vibration reduction gear structure. BACKGROUND

[0002] Gears are widely used in transmission field, the machining precision, installation error and working load of gears can cause abnormal vibration of gears; the existing methods for reducing gear vibration mainly include improving gear machining precision, controlling gear installation error, special process of gear surface and increasing shaft coupling.

[0003] In rack and pinion transmission, the length of rack may be up to tens of kilometers, and there is a problem of segmented manufacturing and segmented replacement, in this case, the rack cannot be guaranteed to have precise tooth profile no matter how, and considering thermal expansion and contraction, a gap is also reserved between racks; improving gear machining precision, controlling installation error and special process of gear surface have certain feasibility in precise and low load machinery, but the production cost is very high; increasing shaft coupling requires a large external space, which is not suitable for occasions with high space requirements. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a vibration reduction gear structure.

[0005] The solution adopted by the present application to solve the technical problem is:

[0006] A vibration reduction gear structure, comprising a hollow shaft, an outer gear ring sleeved outside the hollow shaft and coaxially arranged with the hollow shaft, and an elastic damping vibration reduction unit located between the hollow shaft and the outer gear ring; the hollow shaft and the outer gear ring are gap-fitted and close to each other on one side to form a plurality of mounting cavities for mounting the elastic damping vibration reduction unit; the elastic damping vibration reduction unit is in abutment with the outer gear ring and the hollow shaft, respectively.

[0007] The elastic damping vibration reduction unit is arranged between the outer gear ring and the hollow shaft to realize elastic connection with the outer gear ring and the hollow shaft, and the hollow shaft and the outer gear ring are not in contact, which effectively reduces the occupation of space and makes the processing more convenient; at the same time, in the rotating process, the elastic damping vibration reduction unit will be deformed under stress to compensate for the instantaneous speed change; in the transmission of torque change, the elastic damping vibration reduction unit can absorb the torsional vibration energy, thereby achieving the effect of reducing gear vibration.

[0008] In some possible implementation manners,

[0009] The hollow shaft comprises a sleeve-shaped shaft body and a plurality of outer convex structures arranged circumferentially along the shaft body; the mounting cavities are formed between adjacent two outer convex structures.

[0010] In some possible implementation manners,

[0011] The outer ring gear comprises a ring gear body, and an inner convex structure arranged inside the ring gear body and located in the mounting cavity.

[0012] In some possible implementation manners,

[0013] The inner convex structure is arranged in one-to-one correspondence with the mounting cavities and separates the mounting cavities into two mounting chambers.

[0014] In some possible implementation manners,

[0015] There is a gap between the inner convex structure and the outer side surface of the shaft body, and between the outer convex structure and the inner side surface of the ring gear body.

[0016] In some possible implementation manners,

[0017] The gap is 1-1.5 mm.

[0018] In some possible implementation manners,

[0019] Each group of the elastic damping vibration reduction units is made of a material with elasticity, and comprises two damping members which are identical in structure and are respectively arranged in the mounting chambers; the damping members are in abutment with the inner side surfaces of the mounting chambers and are in a compressed state.

[0020] In some possible implementation manners,

[0021] The damping members are in a columnar structure and comprise a columnar structure body, or comprise a columnar structure body and a mandrel which is sleeved in the columnar structure body and coaxial with the columnar structure body.

[0022] In some possible implementation manners,

[0023] The damping members are one or more segments.

[0024] In some possible implementation manners,

[0025] The inner convex structure is smoothly connected to the inner side surface of the ring gear body, and the outer convex structure is smoothly connected to the outer side surface of the shaft body.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The damping members are arranged between the hollow shaft and the outer ring gear, and do not occupy extra space.

[0028] The hollow shaft and the outer gear ring are not in contact in the hollow shaft of the application, which ensures that the hollow shaft and the outer gear ring can rotate with each other when the transmission is impacted, instead of rubbing each other, reduces the impact vibration, reduces the noise of the equipment operation, and improves the comfort of the surrounding personnel; the reduction of impact vibration effectively prolongs the service life of the gear;

[0029] The application sets a damping member on each side of the outer convex structure, so that the gear can realize the damping of impact when rotating in both directions;

[0030] During rotation, the damping member will be slightly deformed due to the change of force on the gear, which compensates for the instantaneous change of rotation speed, and at the same time, the damping member can absorb the torsional vibration energy when transmitting the change of torque, so as to achieve the effect of reducing the vibration of the gear;

[0031] Compared with the gear damping structure in the prior art, the structure of the application is more

[0032] Simple, easy to assemble and disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The figure is a structural schematic diagram of the application;

[0034] Figure 2 The figure is an enlarged schematic diagram of A in the application; Figure 1

[0035] Figure 3 The figure is an axial view of the application;

[0036] 1, hollow shaft; 11, shaft body; 12, outer convex structure; 2, outer gear ring; 21, gear ring body; 22, inner convex structure; 3, damping member; 4, mounting chamber. DETAILED DESCRIPTION

[0037] ​In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. The "first", "second" and similar words mentioned in the present application do not represent any order, quantity or importance, but only distinguish different components. Similarly, "one" or "a" and the like do not represent a quantity limit, but represent the existence of at least one. In the implementation of the present application, the association relationship of the associated objects is described as "and / or", which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" is two or more. For example, multiple positioning columns refer to two or more positioning columns. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] The present application will be described in detail below.

[0039] As Figures 1-3 shown:

[0040] A damping gear structure, comprising a hollow shaft 1, an outer ring 2 sleeved outside the hollow shaft 1 and coaxially arranged with the hollow shaft 1, and an elastic damping damping unit located between the hollow shaft 1 and the outer ring 2; the hollow shaft 1 and the outer ring 2 are gap fitted and form a plurality of mounting cavities for mounting the elastic damping damping unit on one side close to each other; the elastic damping damping unit is respectively in abutment with the outer ring 2 and the hollow shaft 1.

[0041] The elastic damping damping unit is mounted in the mounting cavity and abuts against the outer side of the hollow shaft 1 and the inner side of the outer ring 2, realizing the elastic connection of the outer ring 2 and the hollow shaft 1; due to the arrangement of the elastic damping damping unit and the gap fit of the hollow shaft 1 and the outer ring 2, when rotating, the elastic damping damping unit can effectively absorb the torsional vibration energy, thereby achieving the effect of reducing gear vibration, and the elastic damping damping unit will be deformed under stress, thereby realizing the compensation of instantaneous rotational speed change.

[0042] In some possible embodiments,

[0043] The hollow shaft 1 comprises a sleeve-shaped shaft body 11 and a plurality of outer convex structures 12 arranged circumferentially along the shaft body 11; the mounting cavity is formed between adjacent two outer convex structures 12.

[0044] The hollow shaft 1 is used for the installation of a transmission shaft, the transmission shaft rotates to drive the hollow shaft 1 to rotate, so that the outer convex rotates along the rotation direction of the transmission shaft, and the elastic damping damping unit is extruded to deform, so as to realize the compensation of the instantaneous rotation speed change;

[0045] In some possible implementation manners,

[0046] The outer gear ring 2 comprises a gear ring body 21 and an inner convex structure 22 arranged inside the gear ring body 21 and located in the installation cavity.

[0047] In some possible implementation manners,

[0048] The inner convex structure 22 is arranged in one-to-one correspondence with the installation cavity and divides the installation cavity into two installation cavities 4.

[0049] Preferably, the side surfaces of the plurality of outer convex structures 12 close to one side of the hollow shaft 1 are sequentially connected to form a circular ring structure coaxial with the hollow shaft 1; similarly, the side surfaces of the plurality of inner convex structures 22 close to one side of the outer gear ring 2 are sequentially connected to form a circular ring structure coaxial with the outer gear ring 2.

[0050] During operation, the installation cavity 4 is not always constant; when torsional vibration exists, the inner convex structure 22 of the outer gear ring 12 will have a slight relative movement relative to the installation cavity.

[0051] In some possible implementation manners, in order to ensure that the damping can be realized in both directions during bidirectional operation;

[0052] Each group of the elastic damping damping units is made of a material with elasticity and comprises two damping members 3 which are the same in structure and are respectively installed in the installation cavities 4; the damping members 3 abut against the inner side surfaces of the installation cavities 4 and are in a compressed state.

[0053] As Figure 1 The two damping members 3 are installed in the two installation cavities 4 divided by the inner convex structure 22; when the outer gear ring 2 rotates clockwise, the damping member 3 below each inner convex structure 22 can be extruded to realize the compensation of the instantaneous rotation speed change; conversely, when the outer gear ring 2 rotates counterclockwise, the damping member 3 above each inner convex structure 22 is extruded to realize the compensation of the instantaneous rotation speed change.

[0054] In addition, during use, when the torque changes, the damping member 3 will absorb the torsional vibration energy, so as to achieve the effect of reducing the gear vibration.

[0055] It should be noted that the initial size (free state) of the damping member 3 is larger than the size of the mounting chamber 4. When mounting the damping member 3, it is preferred to first mount the damping members 3 on the same side of the outer convex structure 12; after the damping members 3 on this side are mounted, the hollow shaft 1 is fixed using a tool, and the outer gear ring 2 is rotated, and the inner convex structure 22 will compress the installed damping members 3 to deform, and then the remaining damping members 3 can be installed in the mounting chamber 4 on the other side of the outer convex structure 12. After installation is complete, all damping members 3 are in a compressed state. If the stiffness of the damping members 3 has deviations, it is necessary to pre-group the damping members 3 to make the stiffness of the two groups as equal as possible.

[0056] In some possible implementations,

[0057] The gap exists between the inner convex structure 22 and the outer side of the shaft body 11, and between the outer convex structure 12 and the inner side of the gear ring body 21.

[0058] In some possible implementations,

[0059] The gap is 1-1.5 mm.

[0060] The gap makes the installation of the outer gear ring 2 and the hollow shaft 1 more efficient and reduces the difficulty of production and processing; in the present application, the positioning of the outer gear ring 2 is achieved by arranging the damping members 3 along the circumference of the hollow shaft 1, and using the radial stiffness of the damping members 3.

[0061] In some possible implementations,

[0062] The damping member 3 is made of rubber material and has a columnar structure, including a columnar structure body; or, including a columnar structure body and a core shaft coaxially sleeved in the columnar structure body.

[0063] The columnar structure described herein can be cylindrical or square cylindrical;

[0064] When a single columnar structure body cannot be used for gap positioning of the outer gear ring 2, a core shaft can be added to the columnar structure body to increase the radial stiffness of the damping member 3, so that it can effectively achieve positioning of the outer gear ring 2.

[0065] In some possible implementations,

[0066] The damping member 3 is one or more segments.

[0067] When the maintenance space requirement is extremely small, the damping member 3 can also be designed as a multi-segment combination.

[0068] In some possible implementations,

[0069] The inner convex structure 22 is smoothly connected with the inner side of the gear ring body 21, and the outer convex structure 12 is smoothly connected with the outer side of the shaft body 11.

[0070] The smooth connection makes the contact area between the damping member 3 and the inner side of the mounting cavity 4 larger, and the positioning of the outer gear ring 2 more accurate.

[0071] The present application can adapt to different working conditions by adjusting the shape and performance parameters of the damping member 3.

[0072] The damping member 3 in the present application can be directly inserted into the mounting cavity 4 during assembly, which is simpler than the prior art, reduces the installation difficulty, improves the work efficiency, and the damping member 3 does not involve movable parts and sealing parts, so the structure is simpler.

[0073] The damping member 3 is provided between the adjacent outer convex structure 12 and the inner convex structure 22, which avoids direct abutment and collision damage during rotation.

[0074] The present application effectively reduces the machining precision of the outer gear ring 2 and the mating gear / rack tooth, and is suitable for mass production.

[0075] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be considered as limiting the specific implementation of the present application to the above description. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered as falling within the protection scope of the present application.

Claims

1. A vibration-damping gear configuration, characterized by The hollow shaft, the outer gear ring sleeved outside the hollow shaft and arranged coaxially with the hollow shaft, and the elastic damping damping unit between the hollow shaft and the outer gear ring; the hollow shaft and the outer gear ring are clearance fit and close to one side of each other to form a plurality of mounting cavities for mounting the elastic damping damping unit; the elastic damping damping unit is respectively in contact with the outer gear ring and the hollow shaft; The hollow shaft includes a sleeve-shaped shaft body and a plurality of outer convex structures arranged circumferentially along the shaft body; the mounting cavities are formed between adjacent two outer convex structures; the outer gear ring includes a gear ring body and an inner convex structure arranged inside the gear ring body and located in the mounting cavities; the inner convex structure is arranged one-to-one with the mounting cavities and separates the mounting cavities into two mounting cavities; there is a gap between the inner convex structure and the outer side surface of the shaft body and between the outer convex structure and the inner side surface of the gear ring body; Each group of the elastic damping damping unit is made of a material with elasticity and includes two damping members with the same structure and respectively mounted in the mounting cavities; the damping member is in contact with the inner side surface of the mounting cavity and is in a compressed state; the damping member has a columnar structure and includes a columnar structure body; or, the damping member includes a columnar structure body and a mandrel sleeved inside the columnar structure body and coaxial with the columnar structure body.

2. A vibration-damping gear configuration according to claim 1, wherein The gap is 1-1.5 mm.

3. A vibration-damping gear configuration according to claim 1, wherein The damping member is one or more segments.

4. A vibration-damping gear configuration according to any one of claims 1-3, characterized in that The inner convex structure and the inner side surface of the gear ring body are smoothly transitioned, and the outer convex structure and the outer side surface of the shaft body are smoothly transitioned.

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