CN210661256U - Engine fan bracket assembly with variable speed ratio - Google Patents
Engine fan bracket assembly with variable speed ratio Download PDFInfo
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- CN210661256U CN210661256U CN201921301901.9U CN201921301901U CN210661256U CN 210661256 U CN210661256 U CN 210661256U CN 201921301901 U CN201921301901 U CN 201921301901U CN 210661256 U CN210661256 U CN 210661256U
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- belt pulley
- bracket assembly
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Abstract
The utility model discloses an engine fan bracket assembly with variable speed ratio, which comprises a bracket shaft, a fan connecting disc fixedly connected with one end of the bracket shaft and a fan arranged on the fan connecting disc; the device also comprises a first driven part, a second driven part, a synchronizer and a driving part; the first driven part and the second driven part are rotatably arranged on the bracket shaft; the synchronizer is axially and slidably arranged on the carrier shaft between the first driven piece and the second driven piece and synchronously rotates with the carrier shaft, and the synchronizer is selectively fixedly connected with the first driven piece or the second driven piece; the driving part is fixedly arranged on a crankshaft of the engine and is used for driving the first driven part or/and the second driven part to rotate. The utility model discloses can realize the change of fan velocity ratio under same kind of train, increase the commonality, reduction in production cost.
Description
Technical Field
The utility model belongs to the technical field of engine fan bracket, especially, relate to an engine fan bracket assembly of variable velocity ratio.
Background
The cooling system of the existing road vehicle adopts a bracket fan to increase the ground clearance, and the selection of the speed ratio of the bracket fan has two directions: the large fan is small in speed ratio (lower in oil consumption-for highway vehicles), and the small fan is large in speed ratio (larger in ground clearance and smaller in cab-for engineering vehicles). As shown in fig. 1, the conventional gear train bracket is designed to have a unique speed ratio. In order to adapt to other speed ratios, the gear train needs to be redesigned, and a new fan bracket needs to be replaced; in short, the existing bracket fan scheme only can consider one speed ratio, and the universality is poor. And because of the requirement of the cooling arrangement of the whole vehicle, the same engine needs to develop a plurality of sets of gear train brackets and carry out a plurality of rounds of verification; the production cost is increased undoubtedly.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiencies in the prior art, the utility model provides a technical problem be, provide the engine fan bracket assembly of variable velocity ratio, under same kind of train, can satisfy the demand of two kinds of bracket fan velocity ratios, the commonality is strong, and has reduced manufacturing cost.
In order to solve the technical problem, the utility model provides an engine fan bracket assembly with variable speed ratio, which comprises a bracket shaft, a fan connecting disc fixedly connected with one end of the bracket shaft and a fan arranged on the fan connecting disc; the engine fan bracket assembly further comprises a first driven part, a second driven part, a synchronizer and a driving part;
said first follower and said second follower are rotatably mounted on said carriage shaft; said synchronizer being axially slidably mounted on said carrier shaft between said first follower and said second follower and being rotatable in unison with said carrier shaft, said synchronizer being selectively fixedly connected to either said first follower or said second follower;
the driving part is fixedly arranged on a crankshaft of the engine and is used for driving the first driven part or/and the second driven part to rotate.
Further, the first driven piece is a first gear, and the second driven piece is a second gear;
the driving part comprises a third gear and a fourth gear which are arranged side by side, the third gear is meshed with the first gear, and the fourth gear is meshed with the second gear.
Further, the third gear and the fourth gear are integrally formed into a duplicate gear.
Further, the first driven member is a first chain wheel, and the second driven member is a second chain wheel;
the driving part comprises a third chain wheel and a fourth chain wheel which are arranged side by side, the third chain wheel is connected with the first chain wheel through a transmission chain, and the fourth chain wheel is connected with the second chain wheel through another transmission chain.
Further, the third chain wheel and the fourth chain wheel are integrally formed into a duplex chain wheel.
Further, the first driven part is a first belt pulley, and the second driven part is a second belt pulley;
the driving part comprises a third belt pulley and a fourth belt pulley which are arranged side by side, the third belt pulley is connected with the first belt pulley through a transmission belt, and the fourth belt pulley is connected with the second belt pulley through another transmission belt.
Further, the first driven part is a first belt pulley, and the second driven part is a second belt pulley;
the driving part comprises a double-groove belt pulley, and the first belt pulley and the second belt pulley are respectively connected with the double-groove belt pulley through a transmission belt.
Further, the periphery wall of the bracket shaft is provided with an external spline extending along the axial direction, and the synchronizer is provided with an internal spline matched with the external spline.
Further, the first follower and the second follower are both rotatably mounted on the carriage shaft by bearings.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
the utility model discloses an engine fan bracket assembly with variable speed ratio, which comprises a bracket shaft, a fan connecting disc fixedly connected with one end of the bracket shaft and a fan arranged on the fan connecting disc; the synchronous device also comprises a first driven part and a second driven part which are rotatably arranged on the bracket shaft, a synchronizer which is axially and slidably arranged on the bracket shaft between the first driven part and the second driven part, and a driving part which is fixedly arranged on a crankshaft of the engine; the synchronizer rotates synchronously with the carrier shaft, and the synchronizer is selectively fixedly connected with the first driven piece or the second driven piece; the driving part is used for driving the first driven part or/and the second driven part to rotate.
When the synchronizer is not connected with the first driven part or the second driven part, the first driven part and the second driven part do not transmit torque when driven by the driving part to rotate at different speed ratios; when the synchronizer is fixedly connected with the first driven part and the driving part drives the first driven part to rotate, the synchronizer and the bracket shaft synchronously rotate along with the first driven part; when the synchronizer is fixedly connected with the second driven part and the driving part drives the second driven part to rotate, the synchronizer and the bracket shaft synchronously rotate along with the second driven part; furthermore, the change of the speed ratio of the fan is realized under the same gear train, the universality is increased, the gear train does not need to be redesigned, and the production cost is reduced.
Drawings
FIG. 1 is a gear diagram of a prior art engine fan bracket assembly;
FIG. 2 is a gear diagram of the variable ratio engine fan bracket assembly of the present invention;
FIG. 3 is a schematic view of a portion of a variable ratio engine fan bracket assembly according to the present invention;
FIG. 4 is a front view of FIG. 3;
FIG. 5 is an exploded view of FIG. 3;
in the figure: 1-carrier shaft, 11-external spline, 12-pulley, 2-fan connection disc, 21-fan, 3-first pulley, 4-second pulley, 5-synchronizer, 51-internal spline, 6-crankshaft, 61-pulley, 7-third pulley, 8-fourth pulley, 9-drive belt, 10-bearing.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 2 to 5, the variable speed ratio engine fan bracket assembly includes a bracket shaft 1, a fan connecting plate 2 fixedly connected to one end of the bracket shaft 1, and a fan 21 mounted on the fan connecting plate 2; besides, the device also comprises a first driven part, a second driven part, a synchronizer 5 and a driving part.
Wherein, the first follower and the second follower are rotatably mounted on the bracket shaft 1 through a bearing 10; the synchronizer 5 is axially slidably mounted on the carrier shaft 1 between the first follower and the second follower, and the synchronizer 5 rotates synchronously with the carrier shaft 1 in such a manner that the synchronizer 5 can be selectively slid to the end of the first follower or to the end of the second follower for fixed connection therewith by means of bolts. The driving member needs to be fixedly mounted on a crankshaft 6 (power output shaft) of the engine and used for driving the first driven member or/and the second driven member to rotate.
In this embodiment, the synchronizer 5 and the carrier shaft 1 are axially slidably mounted and synchronously rotated by using splines, that is, the outer peripheral wall of the carrier shaft 1 is provided with an outer spline 11 extending along the axial direction, and the inner peripheral wall of the central hole of the synchronizer 5 is provided with an inner spline 51 adapted to the outer spline 11.
In addition, the synchronizer 5 and the carrier shaft 1 can be axially slidably mounted and synchronously rotated by using a guide flat key or a sliding key. For example, a sliding key (or an axially extending projection) is fixedly arranged on the inner peripheral wall of the central hole of the synchronizer 5, a key groove (a groove matched with the projection, and the projection and the groove complete circumferential positioning to realize synchronous rotation) matched with the sliding key is arranged on the outer peripheral wall of the bracket shaft 1, and the sliding key slides in the key groove. The periphery wall of bracket axle 1 is equipped with the flat key of direction that axially extends (or is equipped with an axially extended lug), and the internal perisporium of 5 centre holes of synchronous ware is equipped with the keyway with the flat key looks adaptations of direction (with the recess that the lug adaptation axial is link up, the lug accomplishes the circumferential location with the recess and realizes synchronous rotation). In addition, there are many structures that can realize axial sliding installation and synchronous rotation, which are not listed here.
The following describes in detail a specific implementation manner in which the driving member drives the first driven member or/and the second driven member to rotate:
1) the first driven piece is a first gear, and the second driven piece is a second gear; the driving part comprises a third gear and a fourth gear which are arranged side by side, the third gear is meshed with the first gear to realize meshing transmission, and the fourth gear is meshed with the second gear to realize meshing transmission.
Wherein; the third gear and the fourth gear may be integrally formed as a duplicate gear.
2) The first driven piece is a first chain wheel, and the second driven piece is a second chain wheel; the driving part comprises a third chain wheel and a fourth chain wheel which are arranged side by side, the third chain wheel is connected with the first chain wheel through a transmission chain to realize chain transmission, and the fourth chain wheel is connected with the second chain wheel through another transmission chain to realize chain transmission. During specific implementation, only one transmission chain meeting the requirement can be installed according to the required speed ratio requirement.
Wherein, the third chain wheel and the fourth chain wheel are integrally formed into a duplex chain wheel.
3) In this embodiment, the first driven member is a first belt pulley 3, and the second driven member is a second belt pulley 4; the driving part comprises a third belt pulley 7 and a fourth belt pulley 8 which are arranged side by side, the third belt pulley 7 is connected with the first belt pulley 3 through a transmission belt 9 to realize belt transmission, and the fourth belt pulley 8 is connected with the second belt pulley 4 through another transmission belt 9 to realize belt transmission. In specific implementation, only one transmission belt 9 meeting the requirement can be installed according to the required speed ratio requirement.
Alternatively, a double-grooved pulley is used instead of the third pulley 7 and the fourth pulley 8 arranged side by side, and then the first pulley 3 and the second pulley 4 are connected to the double-grooved pulley through a transmission belt 9, respectively.
The specific working principle is as follows:
when the synchronizer 5 is not connected with the first belt pulley 3 or the second belt pulley 4, the first belt pulley 3 and the second belt pulley 4 do not transmit torque when being driven by the third belt pulley 7 and the fourth belt pulley 8 to rotate at different speed ratios respectively; when the synchronizer 5 is fixedly connected with the first belt pulley 3 through the bolt, and the third belt pulley 7 drives the first belt pulley 3 to rotate, the first belt pulley 3 transmits the rotation to the synchronizer 5, namely, the synchronizer 5 and the bracket shaft 1 synchronously rotate along with the first belt pulley 3; at the moment, the second belt pulley 4 idles under the driving of the fourth belt pulley 8; or directly without the drive belt 9 between the second pulley 4 and the fourth pulley 8. When the synchronizer 5 is fixedly connected with the second belt pulley 4 through a bolt, and the fourth belt pulley 8 drives the second belt pulley 4 to rotate, the second belt pulley 4 transmits the rotation to the synchronizer 5, namely the synchronizer 5 and the bracket shaft 1 synchronously rotate along with the second belt pulley 4; at the moment, the first belt pulley 3 idles under the driving of the third belt pulley 7; or directly without the drive belt 9 between the first pulley 3 and the third pulley 7.
To sum up, the utility model discloses engine fan bracket assembly of variable velocity ratio has realized the change of fan velocity ratio under same kind of train, has increased the commonality, need not redesign train, has reduced manufacturing cost.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the design principle of the present invention, and these should also be considered as belonging to the protection scope of the present invention.
Claims (9)
1. A variable-speed-ratio engine fan bracket assembly comprises a bracket shaft, a fan connecting disc fixedly connected with one end of the bracket shaft and a fan arranged on the fan connecting disc; the engine fan bracket assembly is characterized by further comprising a first driven part, a second driven part, a synchronizer and a driving part;
said first follower and said second follower are rotatably mounted on said carriage shaft; said synchronizer being axially slidably mounted on said carrier shaft between said first follower and said second follower and being rotatable in unison with said carrier shaft, said synchronizer being selectively fixedly connected to either said first follower or said second follower;
the driving part is fixedly arranged on a crankshaft of the engine and is used for driving the first driven part or/and the second driven part to rotate.
2. A variable ratio engine fan bracket assembly as set forth in claim 1 wherein said first follower is a first gear and said second follower is a second gear;
the driving part comprises a third gear and a fourth gear which are arranged side by side, the third gear is meshed with the first gear, and the fourth gear is meshed with the second gear.
3. A variable ratio engine fan bracket assembly as set forth in claim 2 wherein said third gear and said fourth gear are integrally formed as a duplicate gear.
4. A variable ratio engine fan bracket assembly according to claim 1, wherein the first follower is a first sprocket and the second follower is a second sprocket;
the driving part comprises a third chain wheel and a fourth chain wheel which are arranged side by side, the third chain wheel is connected with the first chain wheel through a transmission chain, and the fourth chain wheel is connected with the second chain wheel through another transmission chain.
5. A variable ratio engine fan bracket assembly as set forth in claim 4, wherein said third sprocket and said fourth sprocket are integrally formed as a twin sprocket.
6. A variable ratio engine fan bracket assembly according to claim 1, wherein the first follower is a first pulley and the second follower is a second pulley;
the driving part comprises a third belt pulley and a fourth belt pulley which are arranged side by side, the third belt pulley is connected with the first belt pulley through a transmission belt, and the fourth belt pulley is connected with the second belt pulley through another transmission belt.
7. A variable ratio engine fan bracket assembly according to claim 1, wherein the first follower is a first pulley and the second follower is a second pulley;
the driving part comprises a double-groove belt pulley, and the first belt pulley and the second belt pulley are respectively connected with the double-groove belt pulley through a transmission belt.
8. A variable ratio engine fan bracket assembly as set forth in claim 1, wherein said outer peripheral wall of said bracket shaft is provided with axially extending external splines and said synchronizer is provided with internal splines adapted to said external splines.
9. A variable ratio engine fan bracket assembly according to claim 1, wherein the first and second followers are each rotatably mounted on the bracket shaft by bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301901.9U CN210661256U (en) | 2019-08-12 | 2019-08-12 | Engine fan bracket assembly with variable speed ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301901.9U CN210661256U (en) | 2019-08-12 | 2019-08-12 | Engine fan bracket assembly with variable speed ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210661256U true CN210661256U (en) | 2020-06-02 |
Family
ID=70838963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921301901.9U Active CN210661256U (en) | 2019-08-12 | 2019-08-12 | Engine fan bracket assembly with variable speed ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210661256U (en) |
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2019
- 2019-08-12 CN CN201921301901.9U patent/CN210661256U/en active Active
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