CN211975794U - Automatic tensioning wheel with novel dustproof structure - Google Patents
Automatic tensioning wheel with novel dustproof structure Download PDFInfo
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- CN211975794U CN211975794U CN201922393795.8U CN201922393795U CN211975794U CN 211975794 U CN211975794 U CN 211975794U CN 201922393795 U CN201922393795 U CN 201922393795U CN 211975794 U CN211975794 U CN 211975794U
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- belt pulley
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- bolt
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- 238000009434 installation Methods 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 239000011257 shell material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model discloses an automatic tensioning wheel with a novel dustproof structure, which comprises a rocker arm assembly, a belt pulley, a bearing and a bolt, wherein the rocker arm assembly is provided with an installation boss, and the installation boss is provided with a through hole which runs through the installation boss along the axis; the bearing is sleeved outside the mounting boss, the belt pulley is sleeved outside the bearing, and the belt pulley is provided with a limiting part for limiting the bearing along an axis; the bolt comprises a head part and a rod part which are connected, the rod part penetrates into the through hole and is in threaded connection with the mounting boss, so that the head part is abutted against the bearing, and a gap between the head part and the limiting part is between 1 and 2 mm. The dustproof structure that this scheme adopted, its simple structure, low cost still possess good dustproof effect simultaneously.
Description
Technical Field
The utility model relates to a take-up pulley technical field, specific is an automatic take-up pulley with novel dustproof construction.
Background
The pulley is driven by friction and the belt must be tensioned during installation. However, the belt is stretched and loosened after a certain period of operation, is easy to slip, and must be re-tensioned. If the center distance between the two driving wheels can not be adjusted, a tension wheel is needed to ensure the normal driving of the belt without slipping. The tensioner generates a force for tightening the belt by means of a spring or oil pressure or the like so that the belt can be pressed against the working pulley with a suitable pressure.
The automatic tensioning wheel on the motor vehicle usually works under a relatively severe working condition, and if the bearing on the automatic tensioning wheel is not subjected to dustproof treatment, dust easily enters the inside of the bearing through a large gap between the belt pulley and the bearing on the automatic tensioning wheel, so that the bearing of the automatic tensioning wheel is abraded, and the working performance of the automatic tensioning wheel is affected. Accordingly, those skilled in the art are continuously working on effective, low-cost dust-proof structures for application on bearings of automatic tensioners.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect in the prior art, the embodiment of the utility model provides an automatic take-up pulley with novel dustproof construction is provided, it can provide effective and low cost's dustproof construction for the bearing on the take-up pulley.
The embodiment of the application discloses: an automatic tensioning wheel with a novel dustproof structure comprises a rocker arm assembly, a belt pulley, a bearing and a bolt, wherein the rocker arm assembly is provided with an installation boss, and the installation boss is provided with a through hole which penetrates through the installation boss along an axis; the bearing is sleeved outside the mounting boss, the belt pulley is sleeved outside the bearing, and the belt pulley is provided with a limiting part for limiting the bearing along an axis; the bolt comprises a head part and a rod part which are connected, the rod part penetrates into the through hole and is in threaded connection with the mounting boss, so that the head part is abutted against the bearing, and a gap between the head part and the limiting part is between 1 and 2 mm.
Specifically, a flange is arranged at one end, facing the rod part, of the head part, and a gap between the flange and the limiting part is 1-2 mm.
Specifically, the head is provided with a counter bore.
Specifically, the rod part and one end connected with the head part are provided with a step part, the step part extends into the through hole, and the counter sink extends into the step part.
Specifically, the step portion is cylindric, the step portion with through-hole clearance fit.
Specifically, the cross section of the counter sink is hexagonal.
The utility model discloses following beneficial effect has at least: according to the automatic tensioning wheel, the gap between the bolt head and the limiting part of the bearing on the belt pulley is controlled within a certain small range, the bolt head abuts against the end part of the bearing, and the bolt head can almost cover the space between the inner ring and the outer ring of the bearing, so that foreign matters such as dust are difficult to enter the bearing from the end part of the bearing. Compared with the scheme that the dustproof cover is adopted to prevent dust for the bearing in the prior art, the automatic tensioning wheel in the embodiment prevents dust for the bearing through the head of the bolt, so that the dustproof cover can be omitted, and the material, processing and logistics cost of the automatic tensioning wheel are saved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of an automatic tensioning wheel with a novel dustproof structure in an embodiment of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
Reference numerals of the above figures: 1. mounting a boss; 2. a belt pulley; 21. a limiting part; 3. a bearing; 31. an inner ring; 32. an outer ring; an inner ring; 32. an outer ring; 41. a head portion; 411. a countersunk hole; 42. a rod portion; 421. a step portion.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the automatic tensioning wheel with a novel dustproof structure in the present embodiment includes a rocker arm assembly, a pulley 2, a bearing 3 and a bolt.
Wherein, as shown with particular reference to fig. 2, the rocker arm assembly is provided with a mounting boss 1 for mounting the belt pulley 2, preferably, the mounting boss 1 is cylindrical, the mounting boss 1 is provided with a through hole along the axis thereof, and the through hole is coaxial with the mounting boss 1. Bearing 3 installs in belt pulley 2, and the outer lane 32 of bearing 3 can interference fit with belt pulley 2's inner wall to make belt pulley 2 and bearing 3's outer lane 32 synchronous motion, belt pulley 2 establishes outside installation boss 1 through bearing 3's inner circle 31 cover, is equipped with spacing portion 21 on belt pulley 2, and this spacing portion 21 can be followed the axis direction and spacing bearing 3, avoids bearing 3 to take place the drunkenness along the axis. The position-limiting portion 21 may extend from the pulley 2 in the radial direction toward the inner bore of the bearing 3, and the position-limiting portion 21 may extend only to a portion of the outer ring 32 of the bearing 3, but not to the rollers of the bearing 3, in other words, the position-limiting portion 21 overlaps with a portion of the outer ring 32 of the bearing 3. The bolt comprises a head part 41 and a rod part 42 which are connected, and the rod part 42 can penetrate into the through hole from one end of the belt pulley 2 far away from the mounting boss 1 to be in threaded connection with the mounting boss 1, so that the head part 41 of the bolt is abutted to the end part of the bearing 3. A gap is formed between the head 41 of the bolt and the end surface of the limiting part 21, the gap is between 1 mm and 2mm, preferably, the head 41 of the bolt can cover the inner ring 31 of the bearing 3 and extend towards the outer ring 32, and on the premise of not influencing bolt installation, the smaller the gap between the outer edge of the head 41 of the bolt and the end surface of the limiting part 21 is, the better the gap is, so that the axial end surface of the bearing 3 can be isolated from the external environment as much as possible through shielding of the head 41 of the bolt, and foreign matters such as dust of the external environment are prevented from entering the bearing 3 through the end surface of the bearing 3 to damage the bearing 3.
With the above configuration, in the automatic tension pulley of the present embodiment, the gap between the bolt head 41 and the stopper 21 of the bearing 3 on the pulley 2 is controlled within a certain small range, and the bolt head 41 abuts against the end of the bearing 3, so that the bolt head 41 can almost cover the space between the inner ring 31 and the outer ring 32 of the bearing 3, and thus foreign matter such as dust is hard to enter the bearing 3 from the end of the bearing 3. Compared with the scheme of adopting the dust cover to prevent dust for the bearing 3 in the prior art, the automatic tensioning wheel in the embodiment prevents dust for the bearing 3 through the bolt head 41, so that the dust cover can be omitted, and the material, processing and logistics cost of the automatic tensioning wheel are saved.
Specifically, as shown in fig. 2, a flange is disposed at one end of the bolt head 41 facing the rod 42, and a gap between the flange and the limiting portion 21 is between 1 and 2 mm. By adopting the scheme, the outer diameter of one end, far away from the rod part 42, of the head part 41 is smaller than that of the flange, so that the material adopted by the head part 41 is saved, and the material cost of the automatic tensioning wheel is further reduced.
Specifically, as shown in fig. 1, a countersunk hole 411 is formed in the head 41 of the bolt, and preferably, the cross section of the countersunk hole 411 is hexagonal. By adopting the above scheme, compared with the existing automatic tensioning wheel which usually adopts the outer hexagon bolt (for the convenience of installation, the outer hexagon head needs to have enough length), the bolt in the embodiment can shorten the length of the bolt head 41 along the axis direction on the premise of meeting the convenience of installation, on one hand, the material of the bolt can be saved, and on the other hand, when the end part of the shell of the belt pulley 2 is flush with the bolt head 41, the shell of the belt pulley 2 can not be designed too long, which is beneficial to saving the shell material of the belt pulley 2, and further saves the material cost.
Specifically, as shown in fig. 1, a step portion 421 is provided at one end of the rod portion 42 connected to the head portion 41, the step portion 421 extends into the through hole of the mounting boss 1, and the counter-bore 411 extends into the step portion 421. Preferably, the step portion 421 is cylindrical, and the step portion 421 is in clearance fit with the through hole of the mounting boss 1. In order to ensure the strength of the inner wall of the counter bore 411 when the bolt is tightened and avoid deformation of the inner wall of the counter bore 411, the depth of the counter bore 411 needs to meet a certain design amount, and since the head 41 of the bolt may not be designed to be too long, the counter bore 411 needs to extend into the rod portion 42 to meet the depth requirement, if the thickness of the rod portion 42 is not increased by the stepped portion 421, the strength of the rod portion 42 is likely to be weakened by the counter bore 411, and thus, the connection strength between the rod portion 42 and the head portion 41 of the bolt can be ensured.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (6)
1. An automatic tensioning wheel with a novel dustproof structure is characterized by comprising a rocker arm assembly, a belt pulley, a bearing and a bolt, wherein the rocker arm assembly is provided with an installation boss, and the installation boss is provided with a through hole which penetrates through the installation boss along an axis; the bearing is sleeved outside the mounting boss, the belt pulley is sleeved outside the bearing, and the belt pulley is provided with a limiting part for limiting the bearing along an axis; the bolt comprises a head part and a rod part which are connected, the rod part penetrates into the through hole and is in threaded connection with the mounting boss, so that the head part is abutted against the bearing, and a gap between the head part and the limiting part is between 1 and 2 mm.
2. A tensioner according to claim 1, wherein the end of the head portion facing the shaft portion is provided with a flange, and the gap between the flange and the limiting portion is between 1 and 2 mm.
3. A tensioner according to claim 1, wherein the head portion is provided with a counter-sunk hole.
4. A tensioner according to claim 3, wherein the end of the shank portion connected to the head portion is provided with a step, the step extending into the through hole, and the counter-bore extending into the step.
5. A tensioner according to claim 4, wherein said step is cylindrical and said step is a clearance fit in said through hole.
6. A tensioner according to claim 3, wherein the counter-bore is hexagonal in cross-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922393795.8U CN211975794U (en) | 2019-12-27 | 2019-12-27 | Automatic tensioning wheel with novel dustproof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922393795.8U CN211975794U (en) | 2019-12-27 | 2019-12-27 | Automatic tensioning wheel with novel dustproof structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211975794U true CN211975794U (en) | 2020-11-20 |
Family
ID=73378458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922393795.8U Active CN211975794U (en) | 2019-12-27 | 2019-12-27 | Automatic tensioning wheel with novel dustproof structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211975794U (en) |
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2019
- 2019-12-27 CN CN201922393795.8U patent/CN211975794U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240118 Address after: No. 199 Panlong Road, Jiangling Street, Wujiang District, Suzhou City, Jiangsu Province, 215000 Patentee after: Daigao (Suzhou) Drive System Co.,Ltd. Address before: 215000 E05, 1801 pangjin Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee before: DAYCO (SUZHOU) AUTO PARTS Co.,Ltd. |
|
| TR01 | Transfer of patent right |