CN105317977B

CN105317977B - Construction machinery traveling speed reducer device

Info

Publication number: CN105317977B
Application number: CN201510373091.8A
Authority: CN
Inventors: 铃木健吾; 横田贵也
Original assignee: Nachi Fujikoshi Corp
Current assignee: Nachi Fujikoshi Corp
Priority date: 2013-08-12
Filing date: 2015-06-30
Publication date: 2018-01-30
Anticipated expiration: 2035-06-30
Also published as: CN105317977A; JP2015057562A; JP6318456B2

Abstract

The present invention provides a kind of construction machinery deceleration device, is related to the improvement of the raising of the resistance to surface pressing intensity for the rotation axle portion for acting on construction machinery speed reducer device.Speed reducer device is the reducing gear for possessing the rotation housing that internal tooth is formed in inner circumferential and the gear being engaged with internal tooth being contained in shell of revolution body.Reducing gear possesses：First plate of the intercalation in the tabular of four rotation axle portions with body shell one, the inner ring of axle portion is being rotated with the adjoining of the first plate and intercalation, first packing ring of the intercalation in the periphery of inner ring in a manner of relative first plate slides, with the end surfaces of the first packing ring and intercalation is in the periphery of inner ring and the needle roller of the inner circumferential of gear, it is opposite with the first plate and with the end surfaces of inner ring and needle roller and intercalation rotation axle portion second packing ring, and the fixture for engaging and being filled with second board with rotation axle portion.

Description

Construction machinery traveling speed reducer device

Technical field

The present invention relates to a kind of construction machinery traveling speed reducer device, in more detail, is related to a kind of for driving shoe The speed reducer device for exporting the rotational deceleration of hydraulic motor in driving motors with draw-gear.

Background technology

In the past, as such a construction machinery traveling speed reducer device, such as shown in Fig. 4, in the speed reducer device 20 with On the end (being in Fig. 4 lower end) of the rotation axle portion 23 of the one of body shell 21 according to packing ring (the first packing ring) 28, inner ring 24, Above-mentioned component is installed on the rotation axle portion 23 by needle roller 25, gear 27, the order of packing ring (second packing ring) 29, using in rotary shaft The bolt 30 that screw thread is installed on the end face (being in Fig. 4 upper surface) in portion 23 is to the inner ring 24, needle roller 25, gear 27, packing ring 28th, 29 it is fixed along the movement of shaft core direction, the packing ring 28 of the root side end contact with rotating axle portion 23 is supported to Rotated freely relative to rotation axle portion 23.

In the case, packing ring 28,29 has the function that the movement for the shaft core direction for suppressing needle roller 25.Generally, it is such a Gear configurations are equably configured at 3~4 in a speed reducer device around rotary shaft 31.Generally, packing ring 28,29 due to Needle roller 25, the gear 27 of rotation contact, thus use hard steel, and body shell 21 is using cast iron materials (for example, referring to patent Document 1.).

Citation

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2010-164168 publications

Invent problem to be solved

However, in the speed reducer device 20 shown in patent document 1, due to acting on the needle roller 25 and gear 27 of rotation Thrust load, make the needle roller 25 and gear 27 mobile towards the root wooden fork side (side of body shell 21) of rotation axle portion 23, in this feelings Under condition, the needle roller 25 and gear 27 and the common action of packing ring 28, packing ring 28 are rotated while being urged towards body shell 21 Rotation axle portion 23 root wooden fork side end face.

Therefore, along with the high torque of driving motors, the thrust axially for acting on needle roller 25 and gear 27 carries Lotus increases, and the surface pressing relative to the end face of the root wooden fork side of the rotation axle portion 23 of packing ring 28 increases, thus is necessary rotating Improve the resistance to surface pressing intensity with 28 coacting position of packing ring in the root wooden fork side of axle portion 23.

Although however, to being examined using the outstanding steel of resistance to surface pressing intensity to manufacture the scheme of body shell Consider, but the necessity studied in the presence of the problems such as deterioration to processability, fee of material increase.

The content of the invention

The present invention makes to solve described problem, and its object is to provide a kind of deceleration of construction machinery traveling Machine device, materials'use cast iron materials of the device as body shell, and carried in the rotation axle portion root wooden fork side of body shell The resistance to surface pressing intensity of the root wooden fork side end face of the high rotation axle portion slided relative to packing ring, and relative to the both ends of the gear It is asymmetrically formed the step shape for the end face for being arranged on gear, it is not necessary that the directionality of the end face of the gear is defined.

For solving the scheme of problem

In order to reach the purpose, it is a feature of the present invention that

Possess the body shell for being fixed on construction machinery, rotatably kept relative to the body shell and Rotation housing of the inner circumferential formed with internal tooth and the deceleration for being contained in the gear being engaged in the shell of revolution body and with the internal tooth In mechanism,

The reducing gear has：

First plate, first plate is plate-like, is intercalated in multiple rotation axle portions with body shell one；

Inner ring, the inner ring is adjacent with first plate and is intercalated in the rotation axle portion；

First packing ring, first packing ring are intercalated in the outer of the inner ring in a manner of being slided relative to first plate Week；

The end surfaces of needle roller, the needle roller and first packing ring are simultaneously intercalated in the periphery of the inner ring and the gear Inner circumferential；

Second packing ring, the second packing ring are opposite with first plate and adjacent with the end face of the inner ring and the needle roller Connect, and be intercalated in the rotation axle portion；

Second plate, second plate is plate-like, and the end surfaces of second plate and the second packing ring are simultaneously intercalated in institute State rotation axle portion；And

Fixture, the fixture are sticked in the rotation axle portion, and second plate is clamped,

The stage portion b1 for accommodating first packing ring is provided with the end face of the gear, in the gear and described The opposite end face of one packing ring is provided with the stage portion b2 for accommodating the second packing ring,

The stage portion b1 and stage portion b2 forms symmetrical shape in the both ends of the surface of the gear.

The effect of invention

According to the present invention, the plate of the outstanding steel of resistance to surface pressing intensity is added between packing ring and body shell, is passed through The plate and multiple rotary shafts or the inner ring for being inlaid in rotary shaft are chimeric, and it is not occurred when packing ring and gear rotate Involve rotation, thus it does not produce slip relative to the end face of the root side of the rotation axle portion of body shell.Thereby, it is possible to maintain Body shell is using the state of cast iron material and in the resistance to of the position that the root wooden fork root side raising for rotating axle portion is slided relative to packing ring Surface pressing intensity.

And then according to the present invention, the step shape for the end face for making to be arranged on gear is symmetrical at the both ends of the gear, therefore does not have It is necessary to be defined the direction of the end face of gear, therefore the end face of gear will not be produced when assembling the gear of reducing gear Reverse risk.

Brief description of the drawings

Fig. 1 is the key position longitudinal section for the speed reducer device that embodiments of the present invention are related to.

Fig. 2 is the sectional view of Fig. 1 II-II lines.

The amplification that Fig. 3 is Fig. 1 is schemed in detail.

Fig. 4 is the key position longitudinal section of existing speed reducer device.

Description of reference numerals

10th, 20 speed reducer device

11st, 12 plate

13 locating snap rings (fixture)

14 reducing gears

21 body shells

22 rotation housings

23 rotation axle portions

24 inner rings

25 needle rollers

27 gears

28 packing rings (first)

29 packing rings (second)

B1, b2 stage portion

Embodiment

Hereinafter, the speed reducer device being related to for embodiments of the present invention, appropriate embodiment is enumerated, referring to the drawings It is described in detail.

Fig. 1 represents the longitudinal section of the speed reducer device 10 of embodiments of the present invention, and Fig. 2 represents Fig. 1 II-II lines Sectional view, Fig. 3 represent that Fig. 1 amplification is schemed in detail.

In fig. 2, for marking same reference numerals with Fig. 1 inscape identical inscape, omit detailed Explanation.

In the speed reducer device 10, as shown in figure 1, in multiple, such as four rotary shafts with the one of body shell 21 In the root wooden fork portion (reference picture 1) in portion 23 after intercalation substantially rectangular plate (the first plate) 11, in the rotation axle portion 23 in turn Inner ring 24, packing ring 28, needle roller 25, gear 27 and packing ring 29 are installed, and then (are in Fig. 1 in the 25 opposite side of needle roller of packing ring 29 Upside) on configuration with the general shape identical plate (the second plate) 12 of plate 11, between packing ring 28 and body shell 21 configure plate 12, By locating snap ring 13 to these inner rings 24, packing ring 28, needle roller 25, gear 27, packing ring 29, plate 11, plate 12) movement vertically enters Row is fixed, and the plate 11,12 of the root side end contact with rotating axle portion 23 is supported to and not rotated relative to rotation axle portion 23.

In addition, stage portion b1 and receiving packing ring 29 of the end face of gear 27 formed with receiving packing ring 28 stage portion b2, Stage portion b1 and stage portion b2 shape is configured to symmetrical in the both ends of the surface of gear 27.

In addition, plate 11 and 12 is formed as a generally rectangular, but in the case where the number of rotation axle portion 23 is such as three, its It can also be the plate of triangle.

Using the present invention speed reducer device 10 for example as driving motors reductor construction and in the case of use, by In the thrust load for acting on needle roller 25 and gear 27, these components are made to be moved to the root member side of rotation axle portion 23, in this situation Under, needle roller 25 and gear 27 slide relative to packing ring 28.In the case, because the material of packing ring 28 is strong using resistance to surface pressing Outstanding steel, such as bearing steel are spent, thus even if it is slided relative to needle roller 25 and gear 27, can also keep enough strong Degree.And then the one side of packing ring 28 involves rotation while being urged towards the rotation of body shell 21 with the rotation of needle roller 25 and gear 27 The root wooden fork side of axle portion 23, but packing ring 28 slides relative to plate 11, not with the end contact for the root wooden fork side for rotating axle portion 23.

Because plate 11 uses the outstanding steel for implementing surface treatment of resistance to surface pressing intensity, it is thus possible to same with packing ring 28 Keep sufficient intensity sample.Plate 11 contacts the root wooden fork side end face with the rotation axle portion 23 of the one of body shell 21, plate 11 with it is embedding Close and be fitted together in four inner rings 24 for rotating axle portion 23, thus do not involve rotation relative to the rotation of packing ring 28, in body shell Slip is not produced between 21 and plate 11, does not improve the resistance to surface pressure of the end face of the root wooden fork side of the rotation axle portion 23 of body shell 21 Necessity of force intensity.

As known from the above, the materials'use cast iron materials as body shell 21, can keep not making processability deteriorate and Improve to the increased state of fee of material the resistance to surface pressing intensity of the end face of the root wooden fork side of rotation axle portion 23.

In addition, because the step shape for the end face for being arranged on gear is symmetrical relative to the both ends of the gear, therefore must not The direction of the end face of gear is defined, thus assemble reducing gear gear when will not produce gear end face it is reverse Risk.

Claims

A kind of 1. construction machinery speed reducer device, it is characterised in that

Possessing the body shell for being fixed on construction machinery, rotatably kept and in inner circumferential relative to the body shell Rotation housing formed with internal tooth and the reducing gear for being contained in the gear being engaged in the shell of revolution body and with the internal tooth In,

The reducing gear has：

First plate, first plate is plate-like, is intercalated in multiple rotation axle portions with body shell one；

Inner ring, the inner ring is adjacent with first plate and is intercalated in the multiple rotation axle portion；

First packing ring, first packing ring are intercalated in the periphery of the inner ring in a manner of being slided relative to first plate；

Needle roller, the end surfaces of the needle roller and first packing ring and be intercalated in the inner ring periphery and the gear it is interior Week；

Second packing ring, the second packing ring and first plate it is opposite and with the end surfaces of the inner ring and the needle roller, and It is intercalated in the multiple rotation axle portion；

Second plate, second plate is plate-like, and the end surfaces of second plate and the second packing ring are simultaneously intercalated in described more Individual rotation axle portion；And

Fixture, the fixture are sticked in the multiple rotation axle portion, and second plate is clamped,

The stage portion (b1) for accommodating first packing ring is provided with the end face of the gear, in the gear and described first The opposite end face of packing ring is provided with the stage portion (b2) for accommodating the second packing ring,

The stage portion (b1) of first packing ring is accommodated with accommodating the stage portion (b2) of the second packing ring described The both ends of the surface of gear form symmetrical shape.