CN203906720U - Tensioning pulley structure provided with two-bearing belt pulley - Google Patents
Tensioning pulley structure provided with two-bearing belt pulley Download PDFInfo
- Publication number
- CN203906720U CN203906720U CN201420343785.8U CN201420343785U CN203906720U CN 203906720 U CN203906720 U CN 203906720U CN 201420343785 U CN201420343785 U CN 201420343785U CN 203906720 U CN203906720 U CN 203906720U
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- CN
- China
- Prior art keywords
- belt pulley
- support arm
- bearing
- roller bearing
- dust cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a tensioning pulley structure provided with a two-bearing belt pulley. The tensioning pulley structure comprises a belt pulley body, a support arm shaft connected onto the belt pulley body, two cylindrical roller bearings and the belt pulley, wherein a shaft bolt is connected onto the support arm shaft, the center line of the shaft bolt is aligned to the center line of the belt pulley body, the two cylindrical roller bearings, namely, a first cylindrical roller bearing and a second cylindrical roller bearing, are arranged in the belt pulley and connected onto the support arm shaft and the shaft bolt in series, a first check ring is arranged on the outer side of the first cylindrical roller bearing, and a second check ring is arranged on the outer side of the second cylindrical roller bearing; a dust cover is arranged on the outer side of the second check ring. The shaft bolt adopts an integrated structure comprising an axle, a threaded section and a dust cover check ring, and the diameter of the axle is equal to that of the support arm shaft. The tensioning pulley structure is simple and capable of preventing a belt from deviating from the belt pulley of a tensioning pulley and preventing foreign matters from entering the belt pulley, so that deviation and tearing of the belt can be prevented, and hidden danger of damage to an engine can be eliminated.
Description
Technical field
The utility model relates to the frontal attachments belt drive system of motor car engine, particularly prevents the expansion tightening wheel composite structure that belt deviation is torn.
Background technique
Diesel engine frontal attachments belt drive system is comprised of belt, annex, expansion tightening wheel.Expansion tightening wheel provides system tension for belt, and guides belt transmission path.Existing structure expansion tightening wheel adopts single-bearing belt pulley, and belt pulley axial internal clearance reaches 0.5mm, cannot correctly guide belt transmission path, cause that belt deviation tears, existing structure is without dust cover simultaneously, and foreign matter easily enters belt pulley, causes accessory belt drive system to lose efficacy.
Summary of the invention
The purpose of this utility model is for the problems referred to above, designs a kind of expansion tightening wheel structure of duplex bearing belt pulley, guarantees correct guiding belt transmission path, prevents that belt deviation from tearing, and improves the life and reliability of belt pulley simultaneously.
The technical solution of the utility model: the expansion tightening wheel structure of duplex bearing belt pulley of the present utility model comprises pulley body, is connected to support arm shaft, ball roller bearing and belt pulley in pulley body, coupling shaft bolt on support arm shaft, the center line of axle bolt aligns with the center line of pulley body, ball roller bearing in belt pulley is two, the first ball roller bearing and the second ball roller bearing are connected on support arm shaft and axle bolt, in the first ball roller bearing outside, there is the first back-up ring, in the second ball roller bearing outside, have the second back-up ring; In the second back-up ring outside, there is dust cover.
Described axle bolt comprises wheel shaft, thread section, dust cover back-up ring integral structure, the diameter of wheel shaft equals the diameter of support arm shaft, the axial length sum of the length of wheel shaft and support arm shaft: La+L1+0.1～0.2mm=2L+L2, L is bearing width, the thickness that L2 is dust cover.
Described dust cover is carnival hat shape, dust cover outer most edge diameter D1=D3+5～10mm, dust cover 7 bending parts are that cap body diameter is D2, D3>D2>D, the diameter of the center hole of dust cover equals D+1～2mm, D is the diameter of support arm shaft, the external diameter that D3 is bearing.
In described axle bolt, the length of thread section is Lb=1.8L～2.0L, and L is bearing width, and shaft shoulder place fillet is R=0.2D, the diameter that D is support arm shaft.
The first ball roller bearing of installing in described belt pulley and the second ball roller bearing and belt pulley endoporus are interference fit.
Advantage of the present utility model: through overtesting and test, the utility model can make the axial internal clearance of belt pulley drop to 0.2mm, guarantees correct guiding belt transmission path, prevents that belt deviation from tearing, and improves the life and reliability of belt pulley simultaneously.Two ball roller bearings are installed in described belt pulley, and bearing and belt pulley endoporus are interference fit, and to reduce belt pulley axial internal clearance, bearing center line aligns with belt pulley center line simultaneously, to improve the belt pulley life-span.
Described axle bolt adopts axle and bolt integrated structure, and axle and bearing are interference fit, to reduce belt pulley axial internal clearance, have improved shaft strength, to improve the belt pulley life-span.
Described dust cover is carnival hat shape sheet metal structural, and cost is low, easy for installation, and reliability is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is axle bolt structural representation of the present utility model.
Fig. 3 is dustproof cover structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and example, the utility model is further described.
As shown in Figure 1, the expansion tightening wheel structure of a kind of duplex bearing belt pulley of the present utility model comprises pulley body 1, be connected to the support arm shaft 1a in pulley body 1, ball roller bearing 2 and belt pulley 6, coupling shaft bolt 3 on the support arm shaft 1a of pulley body 1, the center line of axle bolt 3 aligns with the center line of pulley body 1, ball roller bearing 2 in belt pulley is two, the first ball roller bearing 2a and the second ball roller bearing 2b are connected on support arm shaft 1a and axle bolt 3, in the first ball roller bearing 2a outside, there is the first back-up ring 4, in the second ball roller bearing 2b outside, there is the second back-up ring 5, in the second back-up ring 5 outsides, there is dust cover 7.The first ball roller bearing 2a of described belt pulley 6 interior installations and the second ball roller bearing 2b and belt pulley 6 endoporus are interference fit.
Fig. 2 is axle bolt structural representation of the present utility model:
Described axle bolt 3 is the integral structures that comprise wheel shaft 3a, thread section 3b, dust cover back-up ring 3c, the diameter of wheel shaft 3a equals the diameter of support arm shaft 1a, the axial length sum of the length of wheel shaft 3a and support arm shaft 1a: La+L1+0.1～0.2mm=2L+L2, L is bearing width, and L2 is the thickness of dust cover 7.In described axle bolt 3, the length of thread section 3b is Lb=1.8L～2.0L, and L is bearing width, and shaft shoulder place fillet is R=0.2D, and D is the diameter of support arm shaft 1a.
Fig. 3 is dustproof cover structure schematic diagram of the present utility model:
Described dust cover 7 is carnival hat shape, dust cover 7 outer most edge diameter D1=D3+5～10mm, dust cover 7 bending parts are that cap body diameter is D2, D3>D2>D, the diameter of the center hole of dust cover 7 equals D+1～2mm, D is the diameter of support arm shaft 1a, the external diameter that D3 is bearing.
Core of the present utility model is to adopt duplex bearing belt pulley, and the axial internal clearance of belt pulley is reduced, and guarantees correct guiding belt transmission path, prevents that belt deviation from tearing, and improves the life-span of belt pulley simultaneously.Therefore, every employing duplex bearing belt pulley design, protection domain of the present utility model all belonged to.
Claims (5)
1. the expansion tightening wheel structure of a duplex bearing belt pulley, comprise pulley body (1), be connected to the support arm shaft (1a) in pulley body (1), ball roller bearing (2) and belt pulley (6), it is characterized in that: the upper coupling shaft bolt (3) of support arm shaft (1a) in pulley body (1), the center line of axle bolt (3) aligns with the center line of pulley body (1), ball roller bearing (2) in belt pulley is two, the first ball roller bearing (2a) is connected on support arm shaft (1a) and axle bolt (3) with the second ball roller bearing (2b), in the first ball roller bearing (2a) outside, there is the first back-up ring (4), in the second ball roller bearing (2b) outside, there is the second back-up ring (5), in the second back-up ring (5) outside, there is dust cover (7).
2. the expansion tightening wheel structure of duplex bearing belt pulley according to claim 1, it is characterized in that: described axle bolt (3) is the integral structure that comprises wheel shaft (3a), thread section (3b), dust cover back-up ring (3c), the diameter of wheel shaft (3a) equals the diameter of support arm shaft (1a), the axial length L1 sum of the length L a of wheel shaft (3a) and support arm shaft (1a): La+L1+0.1～0.2mm=2L+L2, L is bearing width, and L2 is the thickness of dust cover (7).
3. the expansion tightening wheel structure of duplex bearing belt pulley according to claim 1 and 2, it is characterized in that: described dust cover (7) is carnival hat shape, dust cover (7) outer most edge diameter D1=D3+5～10mm, dust cover (7) bending part is that cap body diameter is D2, D3>D2>D, the diameter of the center hole of dust cover (7) equals D+1～2mm, and D is the diameter of support arm shaft (1a), the external diameter that D3 is bearing.
4. the expansion tightening wheel structure of duplex bearing belt pulley according to claim 1 and 2, it is characterized in that: in described axle bolt (3), the length of thread section (3b) is Lb=1.8L～2.0L, L is bearing width, and shaft shoulder place fillet is R=0.2D, and D is the diameter of support arm shaft (1a).
5. the expansion tightening wheel structure of duplex bearing belt pulley according to claim 1 and 2, is characterized in that: the first ball roller bearing (2a) of installing in described belt pulley (6) and the second ball roller bearing (2b) are interference fit with belt pulley (6) endoporus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420343785.8U CN203906720U (en) | 2014-06-25 | 2014-06-25 | Tensioning pulley structure provided with two-bearing belt pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420343785.8U CN203906720U (en) | 2014-06-25 | 2014-06-25 | Tensioning pulley structure provided with two-bearing belt pulley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906720U true CN203906720U (en) | 2014-10-29 |
Family
ID=51781001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420343785.8U Expired - Fee Related CN203906720U (en) | 2014-06-25 | 2014-06-25 | Tensioning pulley structure provided with two-bearing belt pulley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203906720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972170A (en) * | 2016-06-13 | 2016-09-28 | 北京理工大学 | Rope-driven pulley of rope-driven exoskeleton mechanical arm |
-
2014
- 2014-06-25 CN CN201420343785.8U patent/CN203906720U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972170A (en) * | 2016-06-13 | 2016-09-28 | 北京理工大学 | Rope-driven pulley of rope-driven exoskeleton mechanical arm |
| CN105972170B (en) * | 2016-06-13 | 2019-10-29 | 北京理工大学 | A kind of rope drive pulley of rope driving ectoskeleton mechanical arm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20170625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |