CN100376809C

CN100376809C - Spiral connection

Info

Publication number: CN100376809C
Application number: CNB2004101032561A
Authority: CN
Inventors: R·安真多弗
Original assignee: AVL List GmbH
Current assignee: AVL List GmbH
Priority date: 2003-12-04
Filing date: 2004-12-03
Publication date: 2008-03-26
Anticipated expiration: 2024-12-03
Also published as: CN1654838A; DE102004058080A1

Abstract

The invention relates to a spiral connection especially for transmitting torque, and has a shaft which has a prolonged section limited by core region of minimum spiral diameter, a screw thread section with spire, and a middle region, whose diameter is larger than the same of the screw thread section, between the prolonged section and the screw section.

Description

Spiral connects

Technical field

The present invention relates to a kind of spiral especially for transmitting torque connects, has an axle, the prolonged section that this nucleus with a minimum helical diameter limits, a thread section and a zone line that is provided with between prolonged section and thread section that has helical, its diameter is greater than the diameter of thread section.

Background technique

This spiral connects and generally is used to transmit big power and torque, and is placed in the parts that rotate or fix.

Disclose a kind of spiral among the US2003/0108403A, it has a plurality of fluid passages that distribute on circumference, and it is horizontal that this passage becomes with helical.Yet these passages are arranged on the inside of the nucleus of spiral, so its intensity is reduced in fact.In addition, the relatively little radius of curvature by channel bottom makes one this spiral deleterious effects can be excluded.Therefore, this spiral can not transmit big power and torque.

DE10200622A1 discloses a kind of spiral, is used for high vacuum jar, and it has one or more passage that passes through helical.Each passage is cut spiral manufacturing by finish-milling, and wherein passage is formed by a gentle slope of screw axis basically.And in this spiral, because the passage of this milling makes the nucleus that can carry reduce.In addition, the whole passage that forms has shortcoming shallowly, and the zone that can carry screw thread is crossed greatly and reduced, but the same generation of this load to spiral must not influence.

DE3420646C2 discloses a kind of spiral, be used to make so-called connection, it has a bolt head and an axle, and the fluid flowing passage at the longitudinal extension of axle, this passage extends up to thread neck part on the whole length of thread section on the outer circumferential face of axle.Channel bottom also extends to the nucleus that carries of spiral, but so the load of spiral reduce.

In addition, US5,407,312A discloses a kind of spiral, and this spiral has the groove that passes helical, and this trench fill has a kind of material with specific function.This passage is relatively dark at the nucleus of spiral, and equally the bearing capacity of spiral is had adverse influence.

Summary of the invention

Task of the present invention provides a kind of spiral and connects, and it at least can be so that the local flow of fluid in the helical zone, and does not influence the bearing capacity of spiral.

Can realize like this that according to purpose of the present invention this thread section has a passage that passes through helical at least, this passage is positioned at the outside of the nucleus with minimum screw diameter.Can also be arranged to, the channel bottom of passage is tangent with the nucleus with minimum screw diameter.Therefore, the nucleus of the spiral that is limited by the minimum helical diameter does not dwindle, and therefore can transmit big power and torque.

When passage was arranged essentially parallel to screw axis and is provided with, a kind of simple manufacturing can realize.

For fear of harmful indenture effect, be arranged to make passage to have a fan shaped cross section.Fan-shaped radius can for example be to approximate half of the diameter of thread greatly.

In a particularly advantageous embodiment, the present invention is arranged to passage and begins in the helical surface of zone line.Therefore this fluid can pass through an injection channel, the threadless cover zone flows that for example is transferred and connects at spiral, and up to the spiral root, liquid can be directed into axial flow channel therefrom at the passage of axial flow by whole thread section extension.In order to guarantee the high flow capacity of liquid, the size of passage is such, promptly makes the summation of cross section of passage equal the minimum cross-section of flow in pipes at least.

When being provided with at least two, when preferably being three passages at least, can reach high passing capacity, wherein preferred passage five equilibrium ground on the circumference that spiral connects is arranged.

In order to transmit king-sized power and torque, advantageously make spiral by the high-strength material manufacturing.

Description of drawings

By means of accompanying drawing the present invention is described in detail below.Wherein:

Fig. 1 represents that with oblique drawing spiral of the present invention connects;

Fig. 2 represents that spiral is connected the view of the arrow II direction of Fig. 1;

Fig. 3 represents that with side view spiral connects;

Fig. 4 is the longitudinal section that makes use-case that spiral connects.

Embodiment

Connect 1 at the spiral shown in Fig. 1-3 and have axle 3, one zone lines 4 of 20, one prolonged sections and a thread section 5 that has helical 6 that has bolt head 2.Prolonged section 3 limits minimum screw diameter D1.The diameter D2 of the zone line 4 of performance adjustment and/or seal action is a bit larger tham major diameter of thread D3.Minor diameter of thread is represented with D4.

In an embodiment, in the thread section 5 of spiral connection 1, form the passage 7 of three five equilibriums on circumference.The size of the degree of depth t of passage 7 is to measure like this, and passage 7 is positioned at the outside of the nucleus 21 of the spiral connection 1 that is limited by minimum diameter D1, and wherein channel bottom 7a is tangent with the cylindrical z that has diameter D1 that dots at most.In this way spiral connect each zone that can bear a heavy burden of 1 reduce avoid by passage 7.

For fear of the indenture effect that is harmful to for formation passage 7, passage 7 has a fan-shaped cross section, and wherein fan-shaped radius r in this embodiment approximates half of major diameter of thread D3 basically greatly.Indenture stress is avoided on the one hand, and helical 6 is reduced as few as possible on the other hand, although passage 7 reaches a bigger passage section.The radius of passage 7, number and cross section are provided with like this, make that the stream of fluid is hindered as few as possible.

In order to transmit big power and torque, spiral connects 1 and advantageously is made of high-intensity material.

Passage 7 is arranged to be arranged essentially parallel to screw axis 1a.

Fig. 4 represents that spiral connects 1 the use-case that makes.For transmitting torque between live axle 8 and rotatable parts 9, parts 9 connect 1 by means of spiral and are fixed on the axle 8.Axle 8 is rotatably supported on the unshowned machine case by sliding bearing 10.Form in axle 8 by

oil supply hole

11,12,13 flow in pipes that form supply to sliding bearing so that come from the lubricant oil in fuel feeding zone 14.In the case, oil inlet hole 11 is arranged in the zone line 4 of spiral connection 1.The summation of the cross section of passage 7 is substantially equal to the summation of the cross section of oil supply hole 11.Lubricant oil from oil inlet hole 11 can enter oily passage 12 by the passage 7 that forms in the intermediate portion 4 of spiral connection 1, and further enters bearing 10 by oily passage 13.By this way, can avoid the weakening of axle 8 by the additional axial oily passage in the zone of spiral connection 1.

Do not suspecting the patent protection of being carried out under the situation about realizing with what is claimed is of the application's submission.The application also keeps only disclosed feature request protection in specification and/or accompanying drawing.

In the adduction relationship of dependent claims, point out the further formation of the theme of main claim by the feature of each dependent claims; They are not understood to abandon obtain the independently concrete protection of the dependent claims of adduction relationship.

Yet the theme of dependent claims also constitutes independently invention, and it has the independently structure of the theme of above-mentioned dependent claims.

The present invention is not limited to the embodiment of specification.In scope of the present invention, having multiple changes and improvements is, particularly such change, element and combination and/or material, its for example by change individually in conjunction with or the mode of execution of change and specification and claim description with accompanying drawing in the feature that comprises and element or method steps be original, and become a new theme or method step that becomes and method step order by combinative feature, and they relate to manufacture method, test method and operating method.

Claims

1. a spiral that is used for transmitting torque connects, it has an axle, this has a prolonged section that is limited by the nucleus of minimum helical diameter, a thread section and a zone line that between prolonged section and thread section, is provided with that has helical, the diameter of described zone line is greater than the diameter of thread section, it is characterized in that thread section has at least one passage that passes through helical, described passage is positioned at the outside of the nucleus with minimum screw diameter.

2. spiral as claimed in claim 1 connects, and it is characterized in that, the channel bottom of passage is tangent with the nucleus with minimum screw diameter.

3. spiral as claimed in claim 1 or 2 connects, and it is characterized in that passage is arranged essentially parallel to the screw axis setting.

4. spiral as claimed in claim 1 or 2 connects, and it is characterized in that passage has a fan shaped cross section.

5. spiral as claimed in claim 1 or 2 connects, and it is characterized in that, passage is in the axle surface beginning of zone line.

6. spiral as claimed in claim 1 or 2 connects, and it is characterized in that, at least two passages are set.

7. spiral as claimed in claim 6 connects, and it is characterized in that, at least three passages are set.

8. spiral as claimed in claim 6 connects, and it is characterized in that, passage five equilibrium ground on circumference is provided with.

9. spiral as claimed in claim 1 or 2 connects, and it is characterized in that, the spiral connection is made of high-strength material.

10. spiral as claimed in claim 1 or 2 connects, and connects to make a fluid that has at least one fluid flow in pipes, it is characterized in that the summation of the cross section of passage equals the summation of the cross section of flow in pipes at least.