CN111609047B - Sheath suitable for large-angle conical swing universal joint and manufacturing method thereof - Google Patents
Sheath suitable for large-angle conical swing universal joint and manufacturing method thereof Download PDFInfo
- Publication number
- CN111609047B CN111609047B CN202010482377.0A CN202010482377A CN111609047B CN 111609047 B CN111609047 B CN 111609047B CN 202010482377 A CN202010482377 A CN 202010482377A CN 111609047 B CN111609047 B CN 111609047B
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- leather
- sheath
- tooth
- stitching
- edges
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000010985 leather Substances 0.000 claims abstract description 110
- 238000009958 sewing Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 16
- 230000001054 cortical effect Effects 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 10
- 229920006231 aramid fiber Polymers 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 229920005560 fluorosilicone rubber Polymers 0.000 description 5
- 210000001503 joint Anatomy 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 229920000271 Kevlar® Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- 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
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
- F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pivots And Pivotal Connections (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a sheath suitable for a large-angle conical swing universal joint and a manufacturing method thereof, wherein the sheath comprises a leather sheath and a clamp, and the leather sheath is fixed on the universal joint through the clamp; the leather sheath is a tubular sheath with smooth middle sawteeth at two ends and formed by splicing and sewing a plurality of leather materials, the leather sheath comprises an upper leather mounting sheet, a middle leather tooth sheet and a lower leather mounting sheet which are sequentially connected, the middle leather tooth sheet is of a round table-shaped structure with hollowed upper and lower bottom surfaces, the top edges of the middle leather tooth sheets are connected with the top edges, and the bottom edges of the middle leather tooth sheets are connected with the bottom edges to form a deformable sawteeth-shaped structure. The sheath has better shape-retaining capacity, temperature adaptability and adaptability to different rotating speeds, can meet the requirements of continuous working at a large angle and a long time at a low temperature, has high reliability of working in a severe environment, and has certain advantages in the aspects of volume space, weight, manufacturing cost, maintenance and the like.
Description
Technical Field
The invention belongs to a mechanical transmission system, and particularly relates to a sheath suitable for a large-angle conical swing universal joint and a manufacturing method thereof.
Background
Universal joints are common mechanisms of transmission equipment, are structurally and functionally similar to joints of limbs of a human body, are most widely used in the field of automobiles, such as drive axles of front-drive automobiles, and mainly serve to transmit torque of a driving shaft to a driven shaft, and are divided into constant-speed universal joints, quasi-constant-speed universal joints and non-constant-speed universal joints according to structural characteristics. Such as cross joints, are a common form of non-constant velocity joint.
The ball cage universal joint is one kind of constant velocity universal joint, as shown in figure 1, the ball cage universal joint is composed of a ball cage universal joint 1, a transmission shaft 1-1, a lower end clamp 1-2, a sheath 1-3, a ball cage retainer 1-4, an upper end clamp 1-5, steel balls 1-6, a star-shaped sleeve 1-7, a spherical shell 1-8, a retainer ring 1-9 and the like, wherein the inner surface of the star-shaped sleeve 1-7 is connected with the transmission shaft 1-1 through an internal spline, 6 arc-shaped grooves on the outer surface are used as inner tracks of the steel balls 1-6, the outer tracks are formed on the inner surface of the spherical shell 1-8, one steel ball 6 is respectively arranged in the 6 tracks formed after the star-shaped sleeve 1-7 is assembled with the spherical shell 1-8, and the power is transmitted from the transmission shaft 1-1 through the steel balls 1-6 and the spherical shell 1-8 by the ball cage retainer 1-4. A nonmetallic sheath is usually arranged between the spherical shell 1-8 and the transmission shaft 1-1, and mainly plays roles of preventing dust and foreign matters from entering the internal track and preventing lubricating grease from losing, and the sheath is in a cylindrical structure and swings along with the universal joint. .
The material of the sheath for the general automobile is usually TPE high-strength plastic, the sheath is suitable for the use condition that the working angle is less than +/-20 degrees, the temperature range is-40-50 degrees, the service life is about 1000 hours, the working requirement of a large angle (25-45 degrees) and a long-time low temperature (-45-60 degrees) is required for severe conditions, the existing sheath forms such as TPE, canvas, fluorosilicone rubber and the like are difficult to meet the severe use requirement, and a brand new sheath structure is required to be designed according to the use condition.
Disclosure of Invention
Aiming at the current situation that the existing sheath structure cannot meet the severe use requirement, the invention provides the sheath suitable for the large-angle conical swing universal joint and the manufacturing method thereof, which have better shape retention capability, temperature adaptability and adaptability to different rotating speeds, can meet the requirements of continuous work at a large angle and for a long time at a low temperature, have high reliability of work in a severe environment, and have certain advantages in the aspects of volume space, weight, manufacturing cost, maintenance and the like.
The invention is realized by the following technical scheme:
the sheath suitable for the large-angle conical swing universal joint comprises a leather sheath and a clamp, wherein the leather sheath is fixed on the universal joint through the clamp; the leather sheath is a tubular sheath with smooth middle sawteeth at two ends and formed by splicing and sewing a plurality of leather materials, the leather sheath comprises an upper leather mounting sheet, a middle leather tooth sheet and a lower leather mounting sheet which are sequentially connected, the middle leather tooth sheet is of a round table-shaped structure with hollowed upper and lower bottom surfaces, the top edges of the middle leather tooth sheets are connected with the top edges, and the bottom edges of the middle leather tooth sheets are connected with the bottom edges to form a deformable sawteeth-shaped structure.
Further, the outer diameter of the middle cortical tooth of the front piece and the outer diameter of the middle cortical tooth of the rear piece which are adjacently connected are consistent, and the inner diameter of the middle cortical tooth of the rear piece are matched with each other.
Further, the upper end leather mounting sheet and the lower end leather mounting sheet are rectangular leather materials with certain widths, and the length of the long side of each rectangular leather material is consistent with the circumferential length of the outer diameter or the inner diameter of the middle leather tooth sheet connected with each rectangular leather material.
Further, the leather is first layer cowhide.
Further, the splicing and sewing of the plurality of leather materials adopts block dense locking type sewing through aramid fiber.
Further, the thickness of the leather at the sewing position is half of the original thickness of the leather.
The invention also provides a manufacturing method of the sheath suitable for the large-angle conical swing universal joint, which comprises the following steps:
determining the size: splitting the appearance of the sheath according to the actual use requirement, and dividing the sheath into an upper leather mounting plate, a plurality of middle leather tooth plates and a lower leather mounting plate, and designing the dimension;
cutting: cutting leather according to the size, and reserving a lap joint surface;
stitching: stitching the top edges and the top edges of the middle leather tooth sheets of the round table-shaped structures with hollowed upper and lower bottom surfaces, stitching the bottom edges and the bottom edges to form a deformable saw-tooth-shaped structure, stitching the top edges of the middle leather tooth sheets of the first sheet and the edges of the upper leather mounting sheets, and stitching the top edges of the middle leather tooth sheets of the last sheet and the edges of the lower leather mounting sheets;
and (2) mounting: the two ends of the stitched leather sheath are respectively fixed on the spherical shell and the transmission shaft by the clamp.
Further, the stitching intersection position of each piece of leather is thinned to half the original thickness, and then stitching is performed in a locking stitching mode, wherein the stitching interval is 1-2mm.
The invention has the beneficial effects that:
the invention provides a sheath suitable for a large-angle conical swing universal joint, and compared with rubber and plastic materials, the sheath does not need a die in the manufacturing process, and the cost is lower; the friction coefficient of the cowhide is lower, abrasion caused by sliding between the cowhide and the compressed state is smaller, the difference between the cowhide and the aramid fiber material at low temperature and normal temperature is small, obvious hardening and embrittlement problems cannot occur, meanwhile, the aramid fiber is used as a sewing material to ensure the bonding strength, so that the strength and the high-low temperature performance of the sheath are better, the sheath can continuously and reliably work for 30W times at high and low temperature, and the sheath is improved by nearly 100 times compared with the sheath made of common structures such as TPE and fluorosilicone rubber; the maintainability is better, and the split dense lock type sewing is adopted, so that if a part of the split dense lock type sewing has problems, the split dense lock type sewing can be conveniently replaced, the quick repair is realized, and the split dense lock type sewing is easier to observe; the sheath adopts a sawtooth shape, has better elongation and shortening ratio, is easier to realize shape retention in the rotating process because the cowhide has certain rigidity, and can not generate the problems of local concave and collapse similar to the fluorine silicone rubber sheath.
Drawings
FIG. 1 is a schematic view of a prior art ball and socket joint;
FIG. 2 is a schematic cross-sectional view of a cortical sheath according to the present invention;
FIG. 3 is a schematic view of the structure of the upper cortical mounting sheet of the present invention;
FIG. 4 is a schematic view of the structure of an intermediate cortical tooth according to the present invention;
FIG. 5 is a schematic view of a lock stitch of the present invention;
FIG. 6 is a front view of the clip of the present invention;
FIG. 7 is a side view of the clip of the present invention in an operative condition
FIG. 8 is a schematic view of the boot of the present invention mounted on a ball and socket joint in a 0 position;
FIG. 9 is a schematic view of the boot of the present invention mounted on a ball and socket joint in a 43 position;
wherein: 1. spherical universal wheels; 1-1 a transmission shaft; 1-2, a lower end clamping hoop; 1-3, a sheath; 1-4, a ball cage retainer; 1-5, upper end clamp; 1-6, steel balls; 1-7, a star-shaped sleeve; 1-8, spherical shell; 1-9, a collar; 2. a leather sheath, 2-1, an upper leather mounting plate; 2-2, middle cortex tooth; 2-3, a lower leather mounting piece; 3. a suture; 4. and (5) clamping the clamp.
Detailed Description
The preferred mechanism and method of motion implementation of the present invention is further described below with reference to the accompanying drawings and detailed description.
As shown in fig. 2-9, a boot suitable for use in a large angle cone swing joint includes a cortical boot 2 and a yoke 4.
The leather sheath 2, as shown in fig. 2-5, is a tubular sheath with smooth middle saw-tooth shape at two ends and formed by splicing and sewing a plurality of leather materials, and comprises an upper leather mounting sheet 2-1, a middle leather tooth sheet 2-2 and a lower leather mounting sheet 2-3 which are sequentially connected.
Wherein, the upper end leather mounting sheet 2-1 and the lower end leather mounting sheet 2-3 are rectangular leather materials with certain width, and form two end nozzles of a sheath with smooth two ends of the leather sheath 2; the length of the rectangle can be made into different lengths according to actual needs.
The middle leather tooth piece 2-2 is a plurality of circular leather pieces with gaps, has a certain annular width, and is connected with the gaps in a butt joint manner to form a truncated cone-shaped structure with hollowed upper and lower bottom surfaces. The middle cortical tooth 2-2 of several pieces can be designed into different ring widths according to practical needs, but in order to facilitate the manufacture of the cortical sheath 2, the outer diameter and the outer diameter, the inner diameter and the inner diameter of the middle cortical tooth 2-2 which are connected adjacently in sequence need to be matched with each other, for example, the outer diameter of the middle cortical tooth 2-2 of the first piece needs to be consistent with the outer diameter of the second piece at the back, the inner diameter of the second piece is consistent with the inner diameter of the third piece, the outer diameter of the fourth piece is consistent with the outer diameter of the fifth piece … …, and so on, the circumferential length of the inner diameter of the first piece is consistent with the length of the long side of the rectangle of the upper cortical mounting piece 2-1, and the inner diameter of the last piece is consistent with the length of the long side of the rectangle of the lower cortical mounting piece 2-3.
The leather sheath 2 is a tubular sheath with smooth middle sawteeth at two ends, the two ends of the leather sheath are respectively fixed on a spherical shell 1-8 and a transmission shaft 1-1 of the spherical universal wheel 1, the middle of the leather sheath is formed by middle leather tooth plates 2-2, and the leather sheath is used for realizing the extension and shortening ratio of the two ends during working, and the more the middle leather tooth plates 2-2 are, the larger the extension and shortening ratio of the leather sheath 2 is.
The leather material for manufacturing the leather sheath 2 is preferably made of cowhide, especially a cowhide blank of a head layer, is manufactured by a crazy horse leather manufacturing process, belongs to a crazy horse leather manufacturing process, has smooth and wear-resistant treated leather surface, can be unfolded and segmented according to the sizes and shapes of the upper leather mounting piece 2-1, the middle leather tooth piece 2-2 and the lower leather mounting piece 2-3, has certain rigidity due to the cowhide, is easier to realize shape retention in the rotating process, and can not generate the problems of local sinking and collapse similar to the common fluorine silicone rubber sheath.
Each piece of leather can be stitched together by using a stitching thread 3, the stitching thread 3 is preferably an aramid fiber, the aramid fiber is also called as Kevlar fiber, is in the form of a plurality of yellow threads, has extremely high strength and toughness, has the characteristics of high temperature resistance, wear resistance and the like, and is widely applied to products such as vehicle tires, bullet-proof clothes and the like.
The cowhide and aramid fiber materials have little difference from the normal temperature state at low temperature, obvious hardening and embrittlement problems can not occur, and meanwhile, the aramid fiber is used as a sewing material to ensure the bonding strength, so that the strength and the high-low temperature performance of the sheath are better, the sheath can continuously and reliably work for 30W times at high and low temperature, and the sheath is improved by nearly 100 times compared with the sheath made of common general structures such as TPE and fluorosilicone rubber.
At the stitching intersection position of the leather, the leather is thinned to half of the original thickness, so that the lap joint position of the two leather is the uniform thickness of the original leather, the structural equal rigidity is ensured, and the structural homogeneity of the whole sheath is ensured.
The sewing adopts a method of blocking and closely locking sewing, as shown in figure 5, and if a part of the sewing has problems in the use process, the sewing can be conveniently replaced, the rapid repair is realized, and the sewing is easier to observe.
The clamp 4, as shown in fig. 6-7, may be a stainless steel clamp 4, and the clamp 4 is provided with a plurality of protrusions and clamping grooves which are matched with each other, so that the appropriate protrusions and clamping grooves can be selected according to different sizes of two ends of the leather sheath 2, and the clamping and locking are facilitated.
The sheath suitable for the large-angle cone swing universal joint can adaptively adjust the structure according to the change of the working state of the universal joint, thereby ensuring that the universal joint always and reliably protects the inner universal joint structure in the large-angle cone swing process. For example, fig. 8 shows the state in which the boot of the present invention is mounted on the ball and socket joint in the 0 ° position; fig. 9 shows the state in which the boot of the present invention is mounted on the ball and socket joint at a 43 position.
The specific molding steps of the sheath of this embodiment are as follows:
a. determining the size: splitting the sheath profile according to actual use requirements, dividing the sheath profile into an upper leather mounting plate 2-1, a plurality of middle leather tooth plates 2-2 and a lower leather mounting plate 2-3, and designing the dimensions and expanding the dimensions on a drawing;
b. cutting: cutting leather according to the size of a drawing, and reserving a certain overlap surface;
c. stitching: grinding the stitching intersection position of each piece of leather to half of the original thickness, and stitching according to the drawing, wherein the stitching mode is lock stitching, and the stitching interval is 1-2mm, as shown in fig. 5;
d. and (2) mounting: the two ends of the stitched leather sheath 2 are respectively fixed on the spherical shell and the transmission shaft by the clamp 4.
This embodiment is a universal mechanism suitable for not only ball and socket joints, but also other structures like joints or large angle cone swings.
Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it should be understood that the invention is not limited to the preferred embodiments, but is capable of modification and equivalents to some of the features described in the foregoing embodiments, but is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (3)
1. The sheath is suitable for the large-angle conical swing universal joint and is characterized by comprising a leather sheath and a clamp, wherein the leather sheath is fixed on the universal joint through the clamp; the leather sheath is a tubular sheath with smooth middle sawteeth at two ends and formed by splicing and sewing a plurality of leather materials, the leather sheath comprises an upper leather mounting sheet, a middle leather tooth sheet and a lower leather mounting sheet which are sequentially connected, the middle leather tooth sheet is of a truncated cone-shaped structure with hollowed upper and lower bottom surfaces, the top edges of the plurality of middle leather tooth sheets are connected with the top edges, and the bottom edges of the plurality of middle leather tooth sheets are connected with the bottom edges to form a deformable sawteeth-shaped structure; the leather material is first layer cowhide; the splicing and sewing of the plurality of leather materials adopts block-wise dense lock type sewing through aramid fiber; the thickness of the leather at the sewing part is half of the original thickness of the leather;
the manufacturing method of the sheath suitable for the large-angle conical swing universal joint comprises the following steps:
determining the size: splitting the appearance of the sheath according to the actual use requirement, and dividing the sheath into an upper leather mounting plate, a plurality of middle leather tooth plates and a lower leather mounting plate, and designing the dimension;
cutting: cutting leather according to the size, and reserving a lap joint surface;
stitching: stitching the top edges and the top edges of the middle leather tooth sheets of the round table-shaped structures with hollowed upper and lower bottom surfaces, stitching the bottom edges and the bottom edges to form a deformable saw-tooth-shaped structure, stitching the top edges of the middle leather tooth sheets of the first sheet and the edges of the upper leather mounting sheets, and stitching the top edges of the middle leather tooth sheets of the last sheet and the edges of the lower leather mounting sheets; grinding the stitching intersection position of each piece of leather to half of the original thickness, and then stitching in a lock stitching mode with stitching spacing of 1-2mm;
and (2) mounting: the two ends of the stitched leather sheath are respectively fixed on the spherical shell and the transmission shaft by the clamp.
2. The boot suitable for use in a large angle cone swing joint according to claim 1, wherein the outer diameter of the intermediate cortical tooth of the adjacent connected front and rear plates is identical, and the inner diameter of the intermediate cortical tooth of the rear plate are matched.
3. The sheath of claim 2, wherein the upper and lower cortical mounting plates are rectangular skins having a width, the length of the long side of the rectangular skin being consistent with the circumferential length of the outer or inner diameter of the middle cortical tooth to which it is attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010482377.0A CN111609047B (en) | 2020-05-29 | 2020-05-29 | Sheath suitable for large-angle conical swing universal joint and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010482377.0A CN111609047B (en) | 2020-05-29 | 2020-05-29 | Sheath suitable for large-angle conical swing universal joint and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111609047A CN111609047A (en) | 2020-09-01 |
| CN111609047B true CN111609047B (en) | 2024-01-30 |
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ID=72197759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010482377.0A Active CN111609047B (en) | 2020-05-29 | 2020-05-29 | Sheath suitable for large-angle conical swing universal joint and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111609047B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB490153A (en) * | 1936-05-25 | 1938-08-10 | Universal Products Co Inc | Improvements in or relating to boots for universal joints |
| CN201170267Y (en) * | 2008-04-02 | 2008-12-24 | 宁波宏祥驱动轴有限公司 | Seal cover |
| CN209026039U (en) * | 2018-08-14 | 2019-06-25 | 万向钱潮股份有限公司 | A kind of light-duty long-life constant velocity cardan joint |
| CN212250869U (en) * | 2020-05-29 | 2020-12-29 | 中国电子科技集团公司第十四研究所 | Sheath suitable for wide-angle circular cone swing universal joint |
-
2020
- 2020-05-29 CN CN202010482377.0A patent/CN111609047B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB490153A (en) * | 1936-05-25 | 1938-08-10 | Universal Products Co Inc | Improvements in or relating to boots for universal joints |
| CN201170267Y (en) * | 2008-04-02 | 2008-12-24 | 宁波宏祥驱动轴有限公司 | Seal cover |
| CN209026039U (en) * | 2018-08-14 | 2019-06-25 | 万向钱潮股份有限公司 | A kind of light-duty long-life constant velocity cardan joint |
| CN212250869U (en) * | 2020-05-29 | 2020-12-29 | 中国电子科技集团公司第十四研究所 | Sheath suitable for wide-angle circular cone swing universal joint |
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| Publication number | Publication date |
|---|---|
| CN111609047A (en) | 2020-09-01 |
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