CN213332021U - Novel pivot plastics closing cap - Google Patents
Novel pivot plastics closing cap Download PDFInfo
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- CN213332021U CN213332021U CN202022111770.7U CN202022111770U CN213332021U CN 213332021 U CN213332021 U CN 213332021U CN 202022111770 U CN202022111770 U CN 202022111770U CN 213332021 U CN213332021 U CN 213332021U
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Abstract
A novel rotary shaft plastic sealing cover comprises an assembly shell and a rotary shaft arranged in the assembly shell, wherein the upper end of the rotary shaft penetrates out of the assembly shell upwards and is provided with a gear, a sealing cover body covers the part of the rotary shaft exposed out of the assembly shell, the outer wall of the upper end of the assembly shell is provided with an annular limiting step, the lower end surface of the sealing cover body is attached to the limiting step, the upper end of the assembly shell penetrates into the port of the lower end of the sealing cover body, and the upper end of the assembly shell and the port of the lower end of the sealing cover body are in interference fit; the center of the upper end surface of the sealing cover body is provided with a convex pipe sleeved outside the rotating shaft; an anti-interference gap is formed between the inner wall of the convex pipe and the outer wall of the rotating shaft; and the protruding pipe is sleeved with rotating shaft foam matched with the protruding pipe. The utility model discloses a novel pivot plastic sealing cover can effectively avoid pivot and the long-term contact of pivot foam to lead to wearing and tearing each other to cause the condition that produces strong noise, guarantees the performance of pivot foam.
Description
Technical Field
The utility model relates to a pivot plastics closing cap.
Background
The rack and pinion steering gear assembly is a device which realizes the transmission of force and completes the steering by utilizing the meshing between a gear and a rack, when a steering wheel is rotated, the gear at the end part of a rotating shaft of the rack and pinion steering gear assembly can be driven to rotate, the gear is meshed with the rack, when the gear rotates, the rack is driven to do left-right linear motion, and the steering wheel is pushed to swing left and right, so that the steering function is realized.
In the prior rack-and-pinion steering gear assembly, a rotating shaft plastic sealing cover is arranged outside an upper end orifice of a gear hole of an assembly shell, rotating shaft foam is arranged above the rotating shaft plastic sealing cover to play a role in sound insulation, dust prevention, sealing and pressure reduction of a rotating shaft on the rotating shaft plastic sealing cover, but along with long-term running of an automobile, abrasion phenomena can occur to all parts of the steering gear, abnormal sound is easy to generate among the parts, the rotating shaft foam is directly sleeved on the rotating shaft plastic sealing cover and is in direct contact with the rotating shaft, the longer the time of the contact between the rotating shaft and the rotating shaft foam is, the greater the abrasion degree is, the more obvious the generated abnormal sound is, the sound insulation effect of the rotating shaft foam disappears, and the situation of strong noise is caused.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a novel pivot plastic sealing cover, it can effectively avoid pivot and the long-term contact of pivot foam to lead to wearing and tearing each other to cause the condition that produces strong noise, guarantees the performance of pivot foam.
The utility model provides a technical scheme that above-mentioned technical problem adopted does:
the utility model discloses a novel pivot plastics closing cap, including the assembly casing, locate the pivot in the assembly casing, the pivot upper end upwards is worn out outside the assembly casing and is equipped with the gear, and the pivot exposes and has the closing cap body, its characterized in that outside the position of assembly casing: the outer wall of the upper end of the assembly shell is provided with an annular limiting step, the lower end face of the sealing cover body is attached to the limiting step, the upper end of the assembly shell penetrates into the port of the lower end of the sealing cover body, and the upper end of the assembly shell is in interference fit with the port of the lower end of the sealing cover body; the center of the upper end surface of the sealing cover body is provided with a convex pipe sleeved outside the rotating shaft; an anti-interference gap is formed between the inner wall of the convex pipe and the outer wall of the rotating shaft; the convex pipe is sleeved with a rotating shaft foam matched with the convex pipe, the lower end face of the rotating shaft foam is attached to the upper end face of the sealing cover body, and the rotating shaft foam and the convex pipe are in interference fit; the upper end surface of the rotating shaft foam is higher than the upper end surface of the convex pipe, a sealing end which is attached to the outer wall of the rotating shaft extends inwards from the inner wall of the orifice at the upper end of the rotating shaft foam, and the lower surface of the sealing end is attached to the upper end surface of the convex pipe; and the inner wall of the sealing end is provided with a noise reduction structure matched with the rotating shaft.
The noise reduction structure comprises an annular groove arranged on the inner wall of the sealing end; an annular cavity communicated with the annular groove is arranged in the sealing end, and the height of the annular cavity is greater than that of the annular groove; an annular clamping block matched with the annular cavity is arranged in the annular cavity; the inner wall of the annular clamping block is provided with an annular guide plate matched with the annular groove; the outer wall of the rotating shaft is provided with an annular guide groove corresponding to the position of the annular guide plate, and the inner end of the annular guide plate penetrates into the annular guide groove and is attached to the bottom of the annular guide groove; the upper surface and the lower surface of the part of the annular guide plate, which is positioned in the annular guide groove, are provided with a plurality of uniformly distributed spherical embedding holes; the ball-shaped embedding hole is internally provided with a ball matched with the spherical embedding hole, and one end of the ball is protruded out of the spherical embedding hole and is attached to the side wall of the annular guide groove.
The inner wall of the annular guide plate is provided with an annular sealing groove; and a sealing ring matched with the sealing groove is arranged in the sealing groove.
The outer wall of the convex pipe is provided with a plurality of uniformly distributed silencing holes, and the silencing holes are communicated with the anti-interference gap.
The utility model has the advantages that:
compared with the prior art, adopt the utility model discloses isolated pivot and the pivot foam of novel pivot plastic sealing cover accessible protruding pipe of structure gets rid of pivot and pivot foam looks mutual friction's possibility, effectively avoids pivot and the long-term condition that leads to wearing and tearing to cause to produce strong noise each other with pivot foam to contact, and can make the noise that produces when guaranteeing the sealed effect of the sealed end of pivot foam through the structure of making an uproar that falls almost can ignore, can not influence syllable-dividing effect, guarantees the performance of pivot foam in the at utmost.
Drawings
FIG. 1 is a schematic structural view of the novel plastic sealing cover for a rotating shaft of the present invention;
fig. 2 is an enlarged view of a portion a of fig. 1.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
referring to fig. 1 and 2, the utility model provides a novel rotary shaft plastic sealing cover, which comprises an assembly shell 1 and a rotary shaft 2 arranged in the assembly shell 1, wherein the upper end of the rotary shaft 2 upwards penetrates out of the assembly shell 1 and is provided with a gear, a sealing cover body 3 is covered outside the part of the rotary shaft 2 exposed out of the assembly shell 1, the outer wall of the upper end of the assembly shell 1 is provided with an annular limiting step 4, the lower end surface of the sealing cover body 3 is attached to the limiting step 4, the upper end of the assembly shell 1 penetrates into the lower end port of the sealing cover body 3, and the upper end of the assembly shell 1 and the lower end port of the sealing cover body 3 are in interference fit; a convex tube 5 sleeved outside the rotating shaft 2 is arranged at the center of the upper end face of the sealing cover body 3; an anti-interference gap 6 is formed between the inner wall of the convex pipe 5 and the outer wall of the rotating shaft 2; the convex tube 5 is externally sleeved with a rotating shaft foam 7 matched with the convex tube, the lower end face of the rotating shaft foam 7 is attached to the upper end face of the seal cover body 3, and the rotating shaft foam 7 is in interference fit with the convex tube 5; the upper end surface of the rotating shaft foam 7 is higher than the upper end surface of the convex tube 5, a sealing end 8 which is attached to the outer wall of the rotating shaft 2 extends inwards from the inner wall of an orifice at the upper end of the rotating shaft foam 7, and the lower surface of the sealing end 8 is attached to the upper end surface of the convex tube 5; and a noise reduction structure matched with the rotating shaft 2 is arranged on the inner wall of the sealing end 8.
The noise reduction structure comprises an annular groove 9 arranged on the inner wall of the sealing end 8; an annular cavity 10 communicated with the annular groove 9 is arranged in the sealing end 8, and the height of the annular cavity 10 is greater than that of the annular groove 9; an annular fixture block 11 matched with the annular cavity 10 is arranged in the annular cavity 10; the inner wall of the annular clamping block 11 is provided with an annular guide plate 12 matched with the annular groove 9; the outer wall of the rotating shaft 2 is provided with an annular guide groove 13 corresponding to the position of the annular guide plate 12, and the inner end of the annular guide plate 12 penetrates into the annular guide groove 13 and is attached to the bottom of the annular guide groove 13; the upper surface and the lower surface of the part of the annular guide plate 12, which is positioned in the annular guide groove 13, are provided with a plurality of uniformly distributed spherical embedding holes 14; the ball 15 matched with the spherical embedding hole 14 is arranged in the spherical embedding hole 14, and one end of the ball 15 protrudes out of the spherical embedding hole 14 and is attached to the side wall of the annular guide groove 13.
An annular sealing groove 16 is formed in the inner wall of the annular guide plate 12; and a sealing ring 17 matched with the sealing groove is arranged in the sealing groove 16.
The outer wall of the convex pipe 5 is provided with a plurality of silencing holes 18 which are uniformly distributed, and the silencing holes 18 are communicated with the anti-interference gap 6.
The utility model discloses a use method as follows:
because the interference fit is between assembly casing 1 upper end and the 3 lower extreme ports of closing cap body, consequently can guarantee the steadiness of 3 lower extremes of closing cap body, under the firm circumstances of 3 lower extremes of closing cap body, locate protruding pipe 5 of 3 upper ends of closing cap body and be in firm state equally, thereby guarantee the stability of jam-proof clearance 6 between 5 inner walls of protruding pipe and the 2 outer walls of pivot, avoid leading to the condition that jam-proof clearance 6 appears because protruding pipe 5 is eccentric, and the existence of jam-proof clearance 6 can effectively avoid the condition that pivot 2 outer walls and 5 inner walls direct contact of protruding pipe lead to wearing and tearing.
The existence of protruding pipe 5 can avoid pivot foam 7 and pivot 2 direct contact, only make sealed end 8 and pivot 2 contact, play the effect of keeping apart pivot foam 7 and pivot 2, get rid of pivot 2 and the possibility of pivot foam 7 looks mutual friction, thereby reduce wear and tear, the noise reduction, prevent the abnormal sound, improve gear work efficiency, long service life, only sealed end 8 and pivot 2 contact this moment, the friction that can form and the noise that produces are very limited, even there is the noise production, also can be isolated by pivot foam 7 or absorbed the amortization by innumerable aperture on the pivot foam 7, play good syllable-dividing effect.
The existence of the structure of making an uproar falls can enough realize the sealed between sealed end 8 and the pivot 2, can reduce the wearing and tearing between annular deflector 12 and the annular guide way 13 again, because the laminating of annular deflector 12 inner wall and annular guide way 13 tank bottom mutually, consequently can realize sealed between 8 and the pivot 2 through annular deflector 12, and when pivot 2 is rotatory, ball 15 then can take place rotatoryly thereupon, thereby improve the smooth and easy nature of pivot 2, effectively avoid contact between pivot 2 and the annular deflector 12 not smooth and lead to the very big condition of noise, and the existence of ball 15 can effectively reduce the area of contact between annular deflector 12 upper and lower surface and the annular guide way 13 tank wall, thereby reduce friction each other, effectively reduce the degree of wear and tear.
In conclusion, the utility model discloses can know, the utility model discloses isolated pivot 2 of accessible bulge tube 5 and pivot foam 7 get rid of pivot 2 and the possibility of pivot foam 7 looks mutual friction, effectively avoid pivot 2 and the pivot foam 7 long-term contact to lead to wearing and tearing to cause the condition that produces strong noise each other, and can make the noise that produces when guaranteeing the sealed effect of the sealed end 8 of pivot foam 7 through the structure of making an uproar that falls almost can neglect, can not influence syllable-dividing effect, guarantee pivot foam 7's performance in the at utmost.
The outer wall of the convex pipe 5 is provided with a plurality of uniformly distributed silencing holes 18, the silencing holes 18 are communicated with the anti-interference gap 6, when the rotating shaft 2 rotates to enable the inner wall of the annular guide plate 12 to rub with the bottom of the annular guide groove 13 to generate a small amount of noise, the small amount of noise can sequentially pass through the anti-interference gap 6 and the silencing holes 18, and is finally absorbed by countless small holes in the rotating shaft foam 7 to achieve a silencing effect, so that the noise can be absorbed and eliminated by the rotating shaft foam 7 within the shortest time due to the existence of the silencing holes 18.
Claims (4)
1. The utility model provides a novel pivot plastics closing cap, includes the assembly casing, locates the pivot in the assembly casing, the pivot upper end upwards wears out outside the assembly casing and is equipped with the gear, and the pivot exposes and has the closing cap body, its characterized in that outside the position of assembly casing: the outer wall of the upper end of the assembly shell is provided with an annular limiting step, the lower end face of the sealing cover body is attached to the limiting step, the upper end of the assembly shell penetrates into the port of the lower end of the sealing cover body, and the upper end of the assembly shell is in interference fit with the port of the lower end of the sealing cover body; the center of the upper end surface of the sealing cover body is provided with a convex pipe sleeved outside the rotating shaft; an anti-interference gap is formed between the inner wall of the convex pipe and the outer wall of the rotating shaft; the convex pipe is sleeved with a rotating shaft foam matched with the convex pipe, the lower end face of the rotating shaft foam is attached to the upper end face of the sealing cover body, and the rotating shaft foam and the convex pipe are in interference fit; the upper end surface of the rotating shaft foam is higher than the upper end surface of the convex pipe, a sealing end which is attached to the outer wall of the rotating shaft extends inwards from the inner wall of the orifice at the upper end of the rotating shaft foam, and the lower surface of the sealing end is attached to the upper end surface of the convex pipe; and the inner wall of the sealing end is provided with a noise reduction structure matched with the rotating shaft.
2. The novel plastic rotary shaft cover according to claim 1, wherein: the noise reduction structure comprises an annular groove arranged on the inner wall of the sealing end; an annular cavity communicated with the annular groove is arranged in the sealing end, and the height of the annular cavity is greater than that of the annular groove; an annular clamping block matched with the annular cavity is arranged in the annular cavity; the inner wall of the annular clamping block is provided with an annular guide plate matched with the annular groove; the outer wall of the rotating shaft is provided with an annular guide groove corresponding to the position of the annular guide plate, and the inner end of the annular guide plate penetrates into the annular guide groove and is attached to the bottom of the annular guide groove; the upper surface and the lower surface of the part of the annular guide plate, which is positioned in the annular guide groove, are provided with a plurality of uniformly distributed spherical embedding holes; the ball-shaped embedding hole is internally provided with a ball matched with the spherical embedding hole, and one end of the ball is protruded out of the spherical embedding hole and is attached to the side wall of the annular guide groove.
3. The novel plastic rotary shaft cover according to claim 2, wherein: the inner wall of the annular guide plate is provided with an annular sealing groove; and a sealing ring matched with the sealing groove is arranged in the sealing groove.
4. The novel plastic rotary shaft cover according to claim 1, wherein: the outer wall of the convex pipe is provided with a plurality of uniformly distributed silencing holes, and the silencing holes are communicated with the anti-interference gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022111770.7U CN213332021U (en) | 2020-09-23 | 2020-09-23 | Novel pivot plastics closing cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022111770.7U CN213332021U (en) | 2020-09-23 | 2020-09-23 | Novel pivot plastics closing cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213332021U true CN213332021U (en) | 2021-06-01 |
Family
ID=76066302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022111770.7U Active CN213332021U (en) | 2020-09-23 | 2020-09-23 | Novel pivot plastics closing cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213332021U (en) |
-
2020
- 2020-09-23 CN CN202022111770.7U patent/CN213332021U/en active Active
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