CN108006093B - Universal joint cross axle - Google Patents
Universal joint cross axle Download PDFInfo
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- CN108006093B CN108006093B CN201711447233.6A CN201711447233A CN108006093B CN 108006093 B CN108006093 B CN 108006093B CN 201711447233 A CN201711447233 A CN 201711447233A CN 108006093 B CN108006093 B CN 108006093B
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- oil
- universal joint
- passage
- base body
- longitudinal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention provides a universal joint cross shaft which comprises a cross-shaped universal joint base body, wherein the tail ends of four universal joint base bodies are provided with end heads; the universal joint base body is internally provided with a longitudinal oil through passage and a transverse oil through passage, and the longitudinal oil through passage penetrates through the central part of the universal joint base body and a pair of longitudinal end heads of the universal joint base body; the transverse oil through passage penetrates through the central part of the universal joint base body and a pair of transverse end heads of the universal joint base body; the end head is also provided with a radial oil through hole which is communicated with the longitudinal oil through passage or the transverse oil through passage. The invention reduces the flow path, resistance and oil consumption, increases the lubricating effect, reduces the jamming of the transmission shaft in the running process caused by dry friction, avoids the occurrence of automobile accidents, and prolongs the service life of the universal joint cross shaft assembly.
Description
Technical Field
The invention relates to the field of automobile parts, in particular to a universal joint cross shaft.
Background
A universal joint cross shaft, namely a universal joint, is a machine part for realizing variable-angle power transmission, is used for changing the position of a transmission axis direction, and is a joint part of a universal transmission device of an automobile driving system. The universal joint cross shaft is combined with a transmission shaft and is called a universal joint cross shaft transmission device. On a vehicle driven by a rear wheel of a front engine, a universal joint cross shaft transmission device is arranged between an output shaft of a speed changer and an input shaft of a main speed reducer of a drive axle; the front engine front wheel driven vehicle omits a transmission shaft, and a universal joint cross shaft is arranged between a front axle half shaft which is responsible for driving and steering and wheels.
In the patent document of the prior 'universal joint cross shaft structure convenient to disassemble' with the application number of CN200820231987.8, an oil injection hole of a universal joint cross shaft is arranged in the middle of the universal joint cross shaft and flows into the bottom of a bearing through an oil duct so as to enter a needle roller group; there is a drawback that the path for the flow of the lubricating oil is large, which further results in greater resistance.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a universal joint cross shaft, which overcomes the defects of large flow distance and larger resistance of lubricating oil of the conventional universal joint cross shaft.
(II) technical scheme
In order to solve the technical problem, the universal joint cross shaft provided by the invention comprises a cross-shaped universal joint base body, wherein the tail ends of four universal joint base bodies are provided with end heads; the universal joint comprises a universal joint base body and is characterized in that a longitudinal oil through channel and a transverse oil through channel are further arranged in the universal joint base body, and the longitudinal oil through channel penetrates through the central part of the universal joint base body and a pair of longitudinal end heads of the universal joint base body; the transverse oil through passage penetrates through the central part of the universal joint base body and a pair of transverse end heads of the universal joint base body; the end head is also provided with a radial oil through hole which is communicated with the longitudinal oil through passage or the transverse oil through passage. The distance between the shaft necks is increased, the four shaft necks are provided with the oil through holes which are communicated with the oil through passage, so that the lubricating oil in the oil through passage directly passes through the oil through holes and enters the lubricating part where the outer circle of the shaft neck is matched with the inner diameter of the bearing for direct lubrication. The lubricating oil reduces the flow path, resistance and oil consumption, increases the lubricating effect, reduces the blockage of the transmission shaft caused by dry friction in the running process, avoids the occurrence of automobile accidents, and prolongs the service life of the universal joint cross shaft assembly.
Preferably, the longitudinal oil through passage and the transverse oil through passage are connected in a cross manner.
Preferably, a connecting portion where the longitudinal oil passage and the transverse oil passage intersect each other has a conical groove recessed to one side.
Preferably, an oil filling hole is further formed in the central portion of the joint base body, and the oil filling hole is communicated with a connecting portion where the longitudinal oil through passage and the transverse oil through passage are crossed.
Preferably, the top end of the oil filling hole is also provided with a thread groove.
Preferably, the end face of the outer end of the end head is provided with a chamfered convex surface with a circular orthographic projection surface.
Preferably, when the section of the chamfer surface is attempted, the included angle between the inclined edge of the chamfer surface and the central axis of the longitudinal oil passage or the transverse oil passage is 33 degrees.
Preferably, the end face of the outer end of the end head is provided with a frustum-shaped inclined notch, the inclined notch is communicated with the longitudinal oil through passage and the transverse oil through passage, and the taper angle of the inclined notch is 60 degrees.
Preferably, the joint of the end head and the universal joint base body is provided with a journal, and the journal is provided with an arc-shaped chamfer.
(III) advantageous effects
The universal joint cross shaft provided by the invention has the following advantages:
1. the distance between the shaft necks is increased, the four shaft necks are provided with the oil through holes which are communicated with the oil through passage, so that the lubricating oil in the oil through passage directly passes through the oil through holes and enters the lubricating part where the outer circle of the shaft neck is matched with the inner diameter of the bearing for direct lubrication. The lubricating oil reduces the flow path, resistance and oil consumption, increases the lubricating effect, reduces the blockage of the transmission shaft caused by dry friction in the running process, avoids the occurrence of automobile accidents, and prolongs the service life of the universal joint cross shaft assembly.
Drawings
FIG. 1 is a schematic structural view of a universal joint cross of embodiment 2 of the invention;
FIG. 2 is a schematic sectional view showing E-E of a universal joint cross according to embodiment 2 of the invention;
FIG. 3 is a schematic sectional structure view of a universal joint cross according to embodiment 2 of the invention;
FIG. 4 is a schematic sectional structure view of a universal joint cross according to embodiment 3 of the invention;
fig. 5 is a side partially enlarged schematic view of an outer convex portion of a universal joint cross according to embodiment 3 of the present invention.
1. A gimbal base; 2. A tip; 3. a longitudinal oil passage; 4. a transverse oil through passage; 5. chamfering; 6. An oil through hole; 7. a conical groove; 8. an oil filler hole; 9. a thread groove; 10. a chamfer plane; 11. a beveled slot opening; 12. a journal; 13. an outer convex portion; 14. a flow guide block assembly; 15. an upper flow guide block; 16. a lower flow guide block; 17. a flow guide cavity; a. A cone angle; b. and (4) an included angle.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1: the invention provides a universal joint cross shaft which comprises a cross-shaped universal joint base body 1, wherein the tail ends of four universal joint base bodies are provided with end heads 2; the universal joint comprises a universal joint base body and is characterized in that a longitudinal oil through channel 3 and a transverse oil through channel 4 are further arranged in the universal joint base body, and the longitudinal oil through channel penetrates through the central part of the universal joint base body and a pair of longitudinal end heads of the universal joint base body; the transverse oil through passage penetrates through the central part of the universal joint base body and a pair of transverse end heads of the universal joint base body; and the end head is also provided with a radial oil through hole 6 which is communicated with the longitudinal oil through passage or the transverse oil through passage.
Example 2: as shown in fig. 1, 2, 3; the invention provides a universal joint cross shaft which comprises a cross-shaped universal joint base body, wherein the tail ends of four universal joint base bodies are provided with end heads; the universal joint comprises a universal joint base body and is characterized in that a longitudinal oil through channel and a transverse oil through channel are further arranged in the universal joint base body, and the longitudinal oil through channel penetrates through the central part of the universal joint base body and a pair of longitudinal end heads of the universal joint base body; the transverse oil through passage penetrates through the central part of the universal joint base body and a pair of transverse end heads of the universal joint base body; the end head is also provided with a radial oil through hole which is communicated with the longitudinal oil through passage or the transverse oil through passage.
The longitudinal oil through passage and the transverse oil through passage are mutually connected in a cross way. Wherein the connecting part of the longitudinal oil through passage and the transverse oil through passage which are intersected with each other is provided with a conical groove 7 which is sunken towards one side. An oil filling hole 8 is further formed in the center of the joint base body and is communicated with the connecting portion where the longitudinal oil through passage and the transverse oil through passage are crossed. The top end of the oil filling hole is also provided with a thread groove 9.
The end face of the outer end of the end head is provided with a chamfered convex surface 10 with a circular orthographic projection surface. When the section of the oblique cutting surface is tried, the included angle b between the oblique edge of the oblique cutting surface and the central axis of the longitudinal oil through passage or the transverse oil through passage is 33 degrees. The end face of the outer end of the end head is provided with a frustum-shaped inclined notch 11, the inclined notch is communicated with the longitudinal oil through passage and the transverse oil through passage, and the taper angle a of the inclined notch is 60 degrees. The connection of the end head to the joint base body has a journal 12 with an arcuate chamfer 5.
Example 3: as shown in FIGS. 4 and 5, the universal joint cross provided by the invention comprises a cross-shaped universal joint base body, wherein the tail ends of four universal joint base bodies are provided with end heads; the universal joint comprises a universal joint base body and is characterized in that a longitudinal oil through channel and a transverse oil through channel are further arranged in the universal joint base body, and the longitudinal oil through channel penetrates through the central part of the universal joint base body and a pair of longitudinal end heads of the universal joint base body; the transverse oil through passage penetrates through the central part of the universal joint base body and a pair of transverse end heads of the universal joint base body; the end head is also provided with a radial oil through hole which is communicated with the longitudinal oil through passage or the transverse oil through passage; the longitudinal oil passage or the transverse oil passage is opposite to the oil passage hole, an outer convex part 13 with a smooth curved surface is arranged on the part, the outer surface of the outer convex part is fixedly provided with two groups of guide block assemblies 14, each guide block assembly comprises an upper guide block 15 positioned at the upper end and a lower guide block 16 positioned at the lower end, a gap is formed between the upper guide block and the lower guide block, and a guide cavity 17 which gradually converges from one side departing from the oil injection hole to the other side close to the oil injection hole is formed; the outer convex part reduces the cross section of the fluid passing through the part to generate the Bernoulli effect, so that the pressure of the fluid at the part is reduced, the flow rate of the liquid entering the oil through hole is improved, the liquid can flow into the oil through hole more favorably, and the turning resistance of the fluid at the part is reduced; the flow guide cavity limits the flow of liquid flowing around the outer convex part, and the volume of the liquid flowing from the outer convex part to the oil through hole is increased.
The longitudinal oil through passage and the transverse oil through passage are mutually connected in a cross way. Wherein the connecting part of the longitudinal oil through passage and the transverse oil through passage which are intersected with each other is provided with a conical groove 7 which is sunken towards one side. The central part of the joint base body is also provided with an oil filling hole 8 which is communicated with the connecting part where the longitudinal oil through passage and the transverse oil through passage are crossed. The top end of the oil filling hole is also provided with a thread groove 9.
The end face of the outer end of the end head is provided with a chamfered convex surface 10 with a circular orthographic projection surface. When the section of the oblique cutting surface is tried, the included angle b between the oblique edge of the oblique cutting surface and the central axis of the longitudinal oil through passage or the transverse oil through passage is 33 degrees. The end face of the outer end of the end head is provided with a frustum-shaped inclined notch 11, the inclined notch is communicated with the longitudinal oil through passage and the transverse oil through passage, and the taper angle a of the inclined notch is 60 degrees. The connection of the end head to the joint base body has a journal 12 with an arcuate chamfer 5.
When the oil filling device is installed, lubricating oil flows in through the oil filling hole, flows into the end face of the outer end of the end head and the side wall of the outer end of the end head through the longitudinal oil through passage or the transverse oil through passage and the oil through hole.
The above embodiments are only used for illustrating the present invention, and the structure, connection mode and the like of each component can be changed, and all equivalent changes and improvements made on the basis of the technical scheme of the present invention should not be excluded from the protection scope of the present invention.
Claims (8)
1. A universal joint cross shaft is characterized by comprising a cross-shaped universal joint base body, wherein the tail ends of four universal joint base bodies are provided with end heads; the universal joint comprises a universal joint base body and is characterized in that a longitudinal oil through channel and a transverse oil through channel are further arranged in the universal joint base body, and the longitudinal oil through channel penetrates through the central part of the universal joint base body and a pair of longitudinal end heads of the universal joint base body; the transverse oil through passage penetrates through the central part of the universal joint base body and a pair of transverse end heads of the universal joint base body; the end head is also provided with a radial oil through hole which is communicated with the longitudinal oil through passage or the transverse oil through passage; the central part of the universal joint base body is also provided with an oil filling hole which is communicated with the connecting part where the longitudinal oil through passage and the transverse oil through passage are crossed; the oil-filling device is characterized in that the longitudinal oil-passing channel or the transverse oil-passing channel is opposite to the oil-passing hole, an outer convex part with a smooth curved surface is arranged on the part, two groups of guide block assemblies are fixed on the outer surface of the outer convex part, each guide block assembly comprises an upper guide block positioned at the upper end and a lower guide block positioned at the lower end, a gap is formed between the upper guide block and the lower guide block, and a guide cavity which is gradually converged by the other side close to the oil-filling hole and deviated from one side of the oil.
2. The universal joint cross of claim 1, wherein said longitudinal and transverse oil galleries are cross-connected to each other.
3. The universal joint cross as claimed in claim 2, wherein a connecting portion where the longitudinal through oil passage and the transverse through oil passage intersect each other has a conical recess recessed to one side.
4. The universal joint cross of claim 1, wherein said oil filler point is further provided with a threaded recess at a top end thereof.
5. The universal joint cross as claimed in any one of claims 1 to 4, wherein the outer end surface of the tip has a chamfered convex surface whose orthographic projection surface is circular.
6. The universal joint cross as claimed in claim 5, wherein the oblique side of the oblique cut surface makes an angle of 33 ° with the central axis of the longitudinal or transverse oil passage when the oblique cut surface is taken in a sectional view.
7. The universal joint cross as claimed in claim 5, wherein the outer end face of said tip has a frustum-shaped oblique notch communicating the longitudinal through oil passage and the transverse through oil passage, said oblique notch having a taper angle of 60 °.
8. The universal joint cross as claimed in any one of claims 1 to 4, wherein the joint of the head and the joint base has a journal, the journal having an arcuate chamfer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447233.6A CN108006093B (en) | 2017-12-27 | 2017-12-27 | Universal joint cross axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447233.6A CN108006093B (en) | 2017-12-27 | 2017-12-27 | Universal joint cross axle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108006093A CN108006093A (en) | 2018-05-08 |
| CN108006093B true CN108006093B (en) | 2020-02-21 |
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ID=62061930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711447233.6A Active CN108006093B (en) | 2017-12-27 | 2017-12-27 | Universal joint cross axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108006093B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201496416U (en) * | 2009-07-14 | 2010-06-02 | 杭州萧山中亚汽配有限公司 | Universal joint crossing shaft with planar root portion |
| CN201757138U (en) * | 2010-06-13 | 2011-03-09 | 杭州新世纪万向节有限公司 | Universal joint with high temperature resistance |
| JP5748616B2 (en) * | 2011-08-30 | 2015-07-15 | 日立オートモティブシステムズ株式会社 | Universal joint |
| CN203655929U (en) * | 2013-11-29 | 2014-06-18 | 泸州开士乐工程技术有限责任公司 | Universal joint |
| CN104315129A (en) * | 2014-10-17 | 2015-01-28 | 中国重汽集团济南动力有限公司 | Novel inter-axle differential device |
| CN204805369U (en) * | 2015-07-15 | 2015-11-25 | 徐和平 | Novel cross universal joint |
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2017
- 2017-12-27 CN CN201711447233.6A patent/CN108006093B/en active Active
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| Publication number | Publication date |
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| CN108006093A (en) | 2018-05-08 |
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