CN202646592U - Dual gear structure and engineering machinery - Google Patents
Dual gear structure and engineering machinery Download PDFInfo
- Publication number
- CN202646592U CN202646592U CN 201220195521 CN201220195521U CN202646592U CN 202646592 U CN202646592 U CN 202646592U CN 201220195521 CN201220195521 CN 201220195521 CN 201220195521 U CN201220195521 U CN 201220195521U CN 202646592 U CN202646592 U CN 202646592U
- Authority
- CN
- China
- Prior art keywords
- axle
- external gear
- pin
- gear
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Gears, Cams (AREA)
Abstract
The utility model provides a dual gear structure and engineering machinery. The dual gear structure comprises a shaft, a first external gear arranged on the shaft, a second external gear sleeved on the shaft and a rotation stopping piece, wherein a first end of the second external gear is positioned by a positioning step on the shaft and a second end of the second external gear is positioned by a nut in bolt connection on the shaft; and the rotation stopping piece is used for limiting the circumferential rotation of the second external gear relative to the shaft and arranged between the second external gear and the shaft. The dual gear structure provided by the utility model has the advantages of simple structure and more convenience for both assembling and disassembling. The engineering machinery provided by the utility model comprises a gearbox which is provided with the dual gear structure.
Description
Technical field
The utility model relates to engineering machinery field, more specifically, relates to a kind of dual gear structure and engineering machinery.
Background technique
Dual gear structure is widely used in for example being applied in the shaft transmission of numerical control machine tool in the gearbox of engineering machinery.Usually all gears all need fine finishing in the shaft transmission of numerical control machine tool, because duplicate gear particularity structurally and the narrow limitation of existing process equipment, there is no method for the dual gear structure of compact structure and adopt the mode of integral type processing to obtain.At present the processing mode of duplicate gear generally is to adopt after two gear split fine finishing again by being welded to connect or realizing dual gear structure by spline joint, can cause distortion but be welded to connect, and causes the accuracy of gear to reduce; There is the axial limiting problem in spline joint, and complex structure, processing cost are high.
For solving the above-mentioned problem that exists by the dual gear structure that is welded to connect or spline joint is made, a kind of assembling type dual gear structure is disclosed in number of patent application is the patent documentation of ZL201120151795.8, referring to Fig. 1, this assembling type dual gear structure comprises axle 1 ', external gear 2 ', external gear 3 ', bolt 4 ' and locating stud 5 ', and wherein external gear 2 ' and axle 1 ' are one-body molded; External gear 3 ' is sleeved on the axle 1 '.External gear 3 ' is connected with axle 1 ' by bolt 4 ' in the axial direction and is fixed, and connects with restriction external gear 3 ' by locating stud 5 ' and axle 1 ' in a circumferential direction and circumferentially rotates relative to axle 1 ' generation.Like this, with respect to being welded to connect or the dual gear structure of spline joint, thereby do not need welding not affect dimensional accuracy, simple in structure and easily realize axially locating in addition.But this assembling type dual gear structure is because of bolt 4 ' easy fracture under the effect of alternating stress, so that it is unreliable to be sleeved on the axially locating of the external gear 3 ' on the axle.In addition, bolt 4 ' the axial locking power that can provide is also smaller.In addition, be used for the fixing locating stud 5 ' of circumferencial direction between external gear 3 ' and the gear shaft 1 ' under the effect of long-term High Rotation Speed and alternating stress, easily loosening, the existence danger that comes off.
The model utility content
The utility model is intended to propose a kind of dual gear structure, adopt bolt to carry out axially locating with the external gear that is sleeved in the assembling type dual gear structure that solves prior art on the axle, the easy fracture of bolt causes the insecure problem of this external gear axially locating.The utility model also provides a kind of engineering machinery that can address the above problem.
An aspect, the utility model provides a kind of dual gear structure, comprises axle and is arranged at the first external gear on the axle, and this dual gear structure also comprises: the second external gear is set on the axle; The first end of the second external gear is by the location of the positioning step on the axle, and the second end is by the nut location that is screwed onto on the axle; Be used for restriction the second external gear and relative to axle the circumferential spline part that rotates occur, the spline part is installed between the second external gear and the axle.
Further, be provided with pin-and-hole between the second external gear and the axle, the axis of pin-and-hole is parallel to the axis of axle; The spline part is the bearing pin that is installed in the pin-and-hole, and the first end of bearing pin is spacing by the bottom surface of pin-and-hole, and the second end of bearing pin is spacing by nut.
Further, pin-and-hole is a plurality of, and a plurality of pin-and-holes are along circumferentially evenly arranging; Bearing pin is a plurality of, and each bearing pin is installed in respectively in the corresponding pin-and-hole.
Further, the external thread section that is used for cooperating with nut of axle is provided with the guiding shrinkage pool, the center line of guiding shrinkage pool and the central lines of pin-and-hole.
Further, the gear shaft that is formed in one of axle and the first external gear.
Further, axle and the first external gear are one-body molded, and the middle part of axle offers the central through bore that is connected for transmission shaft.
Further, positioning step is formed by the end face of the first external gear.
Further, nut is locking nut.
Further, cooperating between the second external gear and the axle is transition fit.
Another aspect, the utility model also provide a kind of engineering machinery, and this project machinery comprises gearbox, and gearbox is provided with above-mentioned dual gear structure.
The dual gear structure that the utility model provides, because the cooperation by positioning step and nut realizes being set in the axially reliable location of the second external gear on the axle, thereby avoided in the prior art causing the insecure problem of this external gear axially locating because being used for being set in the bolt easy-rupturing of the external tooth crop rotation axially locating on the axle.And that the dual gear structure that the utility model provides has is simple in structure, assembling and dismounting advantage eaily all.
Description of drawings
The accompanying drawing that consists of a part of the present utility model is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 has schematically shown the sectional structure of the assembling type dual gear structure of prior art;
Fig. 2 has schematically shown the sectional structure of the preferred embodiment of dual gear structure of the present utility model;
Fig. 3 has schematically shown the right TV structure of Fig. 2; And,
Fig. 4 has schematically shown the right TV structure of Fig. 2 axis, the second external gear and bearing pin.
Embodiment
Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Referring to Fig. 2 to Fig. 4, show the preferred embodiment of the dual gear structure that the utility model provides.As shown in the figure, this dual gear structure comprises at least: axle 1, the first external gear 2, the second external gear 3, nut 4 and spline part.
The first external gear 2 is arranged on the axle 1, and in the present embodiment, preferably the first external gear 2 is one-body molded with axle 1, offers at the middle part of axle 1 for the central through bore 10 that is connected with transmission shaft in addition, and axle 1 is driven by the transmission shaft that is set in the central through bore 10.Certainly, in a kind of unshowned mode of execution, the gear shaft that axle 1 and the first external gear 2 can also be formed in one.On axle 1, also be formed with positioning step 11.
The second external gear 3 is set on the axle 1, and the first end of the second external gear 3 is by positioning step 11 location on the axle 1, and the second end is by nut 4 location that are screwed onto on the axle 1.The spline part is installed between the second external gear 3 and the axle 1, and the spline part is used for restriction the second external gear 3 and occurs circumferentially to rotate relative to axle 1, and namely the spline part is used for the second external gear 3 is circumferentially located.
Like this, adopt the technical solution of the utility model, because the cooperation by positioning step 11 and nut 4 realizes being set in the axially reliable location of the second external gear 3 on the axle 1, thereby avoided in the prior art causing the insecure problem of this external gear axially locating because being used for being set in the bolt easy-rupturing of the external tooth crop rotation axially locating on the axle.And that the dual gear structure that the utility model provides has is simple in structure, assembling and dismounting advantage eaily all.
Preferably, nut 4 adopts locking nut, and locking nut can provide large axial locking power, further strengthens the axial restraint effect to the second external gear 3.Preferably, by finding out among Fig. 2, in the present embodiment, positioning step 11 is directly formed by the end face of the first external gear 2.Certainly, positioning step 11 also can directly be formed by the bulge loop on the axle 1, as long as it can reach the effect to the second external gear 3 first ends location.
By it can also be seen that among Fig. 2 to Fig. 4, also show the preferred implementation of spline part in the present embodiment, as shown in the figure, between the second external gear 3 and axle 1, be provided with pin-and-hole 13, the axis of pin-and-hole 13 is parallel to the axis of axle 1, and the opening of pin-and-hole 13 is towards nut 4.The spline part is the bearing pin 5 that is installed in the pin-and-hole 13, the first end of bearing pin 5 is spacing by the bottom surface of pin-and-hole 13, the second end of bearing pin 5 is spacing by nut 4, so that bearing pin 5 is fixed in the pin-and-hole 13, can prevent that bearing pin 5 from coming off under the effect of long-term High Rotation Speed and alternating stress.
Preferably, pin-and-hole 13 is a plurality of, and a plurality of pin-and-holes are along circumferentially evenly arranging so that axle 1, the second external gear 3, bearing pin 5 circumferentially stressed evenly.Correspondingly, bearing pin 5 is a plurality of, and each bearing pin is installed in respectively in the corresponding pin-and-hole.Preferably, as can be seen from Figure, the center of circle of each pin-and-hole 13 is positioned on the boundary circle of the second external gear 3 and axle 1.
Preferably, can find out in conjunction with Fig. 2 to Fig. 4, axle 1 be used for and the radius of the external thread section that nut 4 cooperates greater than pin-and-hole 13 its beeline D from axle 1 center line, for ease of offering pin-and-hole 13, be provided with guiding shrinkage pool 12 at this external thread section.Preferably, the center line of guiding shrinkage pool 12 and the central lines of pin-and-hole 13.
Preferably, for guaranteeing the assembly precision of the second external gear 3 and axle 1, cooperating between the second external gear 3 and the axle 1 is transition fit.
Processing and the assembly process of the dual gear structure of the utility model preferred embodiment are as described below:
1) axle 1 and the first external gear 2 one are processed into finished product, with the second external gear 3 (except tooth section part) processed finished products, then by transition fit the second external gear 3 is mounted on the axle 1, transition fit has guaranteed axle 1 and has been connected external gear 3 in the radial direction connection precision.Simultaneously, the first end of 11 pairs of the second external gears 3 of positioning step forms the location.
2) offer pin-and-hole 13, bearing pin 5 is installed in the pin-and-hole 13, guarantee that axle 1 and the second external gear 3 can not relatively rotate in a circumferential direction.By first the second external gear 3 being set on the axle 1, and then the mode of pin hole processing 13, can guarantee axle 1 and the second external gear 3 radially with circumferencial direction on precision.
3) nut 4 is screwed on the external thread section on the axle 1, the second end of 4 pairs of the second external gears 3 of nut forms the location, simultaneously also to bearing pin 5 axial limitings.Bearing pin 5 is fixed in the pin-and-hole 13 can not come off.
4) root of fine finishing the second external gear 3 has guaranteed the coaxality of the second external gear 3 with axle 1, and assembling is finished.
In sum, the dual gear structure that the utility model preferred embodiment provides has following advantage: compact structure has overcome the problem that the integral type duplicate gear can't process the duplicate gear of compact structure; Simple in structure, connect precision high, processing cost is low, and assembling and dismounting are all more convenient; The coupling mechanism force of locking nut that is used for axial restraint is large; Locking nut can carry out axial limiting to bearing pin, prevents that bearing pin from coming off under the effect of long-term High Rotation Speed and alternating stress.
The utility model also provides a kind of engineering machinery, and this project machinery comprises gearbox, and gearbox is provided with above-mentioned dual gear structure.Because above-mentioned dual gear structure has above-mentioned technique effect, the engineering machinery with this dual gear structure also should have corresponding technique effect, introduces no longer in detail at this.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. dual gear structure comprises axle (1) and is arranged at the first external gear (2) on the described axle (1), it is characterized in that, also comprises:
The second external gear (3) is set on the described axle (1); The first end of described the second external gear (3) is by the location of the positioning step (11) on the described axle (1), and the second end is by nut (4) location that is screwed onto on the described axle (1);
Be used for limiting described the second external gear (3) and relative to described axle (1) the circumferential spline part that rotates occur, described spline part is installed between described the second external gear (3) and the described axle (1).
2. dual gear structure according to claim 1 is characterized in that,
Be provided with pin-and-hole (13) between described the second external gear (3) and the described axle (1), the axis of described pin-and-hole (13) is parallel to the axis of described axle (1);
Described spline part is for being installed in the bearing pin (5) in the described pin-and-hole (13), and the first end of described bearing pin (5) is spacing by the bottom surface of described pin-and-hole (13), and the second end of described bearing pin (5) is spacing by described nut (4).
3. dual gear structure according to claim 2 is characterized in that, described pin-and-hole (13) is a plurality of, and described a plurality of pin-and-holes are along circumferentially evenly arranging; Described bearing pin (5) is a plurality of, and each described bearing pin is installed in respectively in the corresponding described pin-and-hole.
4. according to claim 2 or 3 described dual gear structures, it is characterized in that, the external thread section that is used for cooperating with described nut (4) of described axle (1) is provided with guiding shrinkage pool (12), the central lines of the center line of described guiding shrinkage pool (12) and described pin-and-hole (13).
5. each described dual gear structure in 3 according to claim 1 is characterized in that, the gear shaft that described axle (1) and described the first external gear (2) are formed in one.
6. each described dual gear structure in 3 according to claim 1, it is characterized in that, described axle (1) is one-body molded with described the first external gear (2), and the middle part of described axle (1) offers for the central through bore that is connected with transmission shaft (10).
7. each described dual gear structure in 3 according to claim 1 is characterized in that, described positioning step (11) is formed by the end face of described the first external gear (2).
8. each described dual gear structure in 3 according to claim 1 is characterized in that, described nut (4) is locking nut.
9. each described dual gear structure in 3 according to claim 1 is characterized in that, cooperating between described the second external gear (3) and the described axle (1) is transition fit.
10. an engineering machinery is characterized in that, this project machinery comprises gearbox, and described gearbox is provided with each described dual gear structure in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220195521 CN202646592U (en) | 2012-05-02 | 2012-05-02 | Dual gear structure and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220195521 CN202646592U (en) | 2012-05-02 | 2012-05-02 | Dual gear structure and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646592U true CN202646592U (en) | 2013-01-02 |
Family
ID=47415702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220195521 Expired - Fee Related CN202646592U (en) | 2012-05-02 | 2012-05-02 | Dual gear structure and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646592U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671826A (en) * | 2013-12-09 | 2014-03-26 | 宁波海天精工股份有限公司 | Finish machining method of duplicate gear |
-
2012
- 2012-05-02 CN CN 201220195521 patent/CN202646592U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671826A (en) * | 2013-12-09 | 2014-03-26 | 宁波海天精工股份有限公司 | Finish machining method of duplicate gear |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103527719B (en) | Bearing-type RV speed reduction unit | |
| CA2811737C (en) | Gear carrier frame | |
| CN104358788A (en) | Device for locking high-speed bearing | |
| CN103867651B (en) | Herringbone tooth star transmission device | |
| CN205453393U (en) | Connection structure of motor shaft and derailleur axle | |
| CN202646592U (en) | Dual gear structure and engineering machinery | |
| CN103867687B (en) | Built-up type segmentation people's word ring gear | |
| CN202048111U (en) | Assembly type duplicate gear shaft structure | |
| CN102829171A (en) | Integrated planet carrier | |
| CN204878399U (en) | Compact form locking device expands | |
| CN204164190U (en) | For the device of high-speed bearing locking | |
| CN104272560A (en) | Rotor structure of rotary electric machine | |
| JP2012219887A (en) | Shaft with gear, and method for manufacturing shaft with gear | |
| CN205991086U (en) | Torsion shaft and dual gear structure and booster engine | |
| CN201934634U (en) | Intermediate gear transmission mechanism | |
| CN204308213U (en) | A kind of horizontal Machining centers main axle structure | |
| CN104088917B (en) | Positive coupling | |
| CN103244650A (en) | Bevel wheel | |
| CN203189553U (en) | Axis device capable of being centered automatically | |
| CN105179845A (en) | Flange-input propeller connecting flange and assembling method thereof | |
| CN205350258U (en) | Initiative spiral bevel gear | |
| CN204465178U (en) | A kind of high speed rotor of motor based on segmentation magnet steel and non-uniform shaft | |
| CN106351974B (en) | Coupling and insert thereof | |
| CN2936520Y (en) | Indexing unit for processing large integral key shaft | |
| CN205678084U (en) | High intensity multi-angle regulation ratchet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20140502 |