A connecting structure for a water pump shaft and a fan shaft

Abstract

The present invention discloses a connection structure between a water pump shaft and a fan shaft, belonging to the field of fan shaft connection structures, and solves the problem that large vibrations during existing work are likely to cause connection failure. It includes a water pump shaft-connected bearing and a fan shaft, and also includes a water pump seat and a fan shaft sleeve. The water pump shaft-connected bearing is installed in the water pump seat. One end of the water pump shaft-connected bearing is connected with a water pump pulley. Inside one end of the water pump pulley, there is a driving flange sleeve. A damping rubber block is embedded between the driving flange sleeve and the water pump pulley. One end of the driving flange sleeve is connected with a detachable flange end cover. One end of the flange end cover is connected with the fan shaft. The fan shaft sleeve is connected with the water pump seat. The fan shaft is installed in the fan shaft sleeve through a bearing assembly. The connection structure between the water pump shaft and the fan shaft of the present invention can effectively reduce vibrations and improve the reliability of the entire transmission component.

Description

Technical Field

[0001] The present invention relates to a connection structure of a fan shaft, and more specifically, to a connection structure between a water pump shaft and a fan shaft. Background Art

[0002] Currently, the power source of the fan used for cooling in an automobile (or a large tractor) generally comes from the end of the water pump shaft of the engine or an independent pulley end. Most of the connection methods adopt a water pump pulley or an independent pulley to connect the fan assembly or connect the fan assembly through a fan shaft flange for speed transmission. Such a method has a lower structure and cost. However, sometimes due to structural limitations, when connecting the fan assembly through the fan shaft flange, the overhanging distance of the fan assembly is too long, and the vibration is large during operation, resulting in frequent connection failures. Summary of the Invention

[0003] The technical problem to be solved by the present invention is in view of the above deficiencies of the prior art. The object of the present invention is to provide a connection structure between a water pump shaft and a fan shaft, which can effectively reduce vibration and improve the reliability of the entire transmission component.

[0004] The technical solution of the present invention is as follows: A connection structure between a water pump shaft and a fan shaft includes a water pump shaft connecting bearing and a fan shaft, and also includes a water pump seat and a fan shaft sleeve. The water pump shaft connecting bearing is installed in the water pump seat. One end of the water pump shaft connecting bearing is connected with a water pump pulley. A driving flange sleeve is arranged inside one end of the water pump pulley. A damping rubber block is embedded between the driving flange sleeve and the water pump pulley. One end of the driving flange sleeve is connected with a detachable flange end cover. One end of the flange end cover is connected with the fan shaft. The fan shaft sleeve is connected with the water pump seat. The fan shaft is installed in the fan shaft sleeve through a bearing assembly.

[0005] As a further improvement, a positioning seat is arranged at the center inside the water pump seat. The water pump shaft connecting bearing is installed in the positioning seat. A receiving cavity for receiving the water pump pulley is formed inside the water pump seat outside the positioning seat. A U-shaped avoidance opening is formed at the position corresponding to the water pump pulley on the outer wall of the water pump seat.

[0006] Further, a first positioning cylinder is arranged at one end of the water pump pulley close to the positioning seat. An installation hole is formed inside the center of the first positioning cylinder. The water pump shaft connecting bearing is installed in the installation hole, and the first positioning cylinder is inserted into a jack formed in the positioning seat.

[0007] Further, a plurality of uniformly arranged pin holes are formed on the driving flange sleeve. A plurality of uniformly arranged pins are arranged on the flange end cover. The pins are movably inserted into the pin holes one by one.

[0008] Further, a split structure in which the driving flange sleeve and the water pump pulley do not contact each other is adopted, and the outer wall of the damping rubber block is attached to the inner wall of the sunk groove formed in the water pump pulley, and the damping rubber block wraps the left end face and the circumferential surface of the driving flange sleeve.

[0009] Further, a plurality of uniformly arranged cylindrical shafts are provided on the left end face of the driving flange sleeve, and each of the pin holes is correspondingly formed on the cylindrical shaft.

[0010] Further, a second positioning cylinder is provided at one end of the fan shaft, the second positioning cylinder is inserted into the jack formed in the center of the flange end cover, and the flange end cover is connected to the fan shaft through a first fastening bolt.

[0011] Further, the bearing assembly includes two rolling bearings, the two rolling bearings are installed in the fan shaft sleeve, the fan shaft is installed in the inner rings of the two rolling bearings, and a bearing spacer sleeve is provided between the outer rings of the two rolling bearings. A limiting structure is further provided between the fan shaft sleeve on both sides of the two rolling bearings and the fan shaft.

[0012] Further, the limiting structure includes two hole-type snap rings and one shaft-type snap ring. The two hole-type snap rings are respectively clamped on the inner wall of the fan shaft sleeve on the other side of the two rolling bearings, and the shaft-type snap ring is clamped on the outer wall of the fan shaft on the other side of one of the rolling bearings. And a thrust step surface is provided on the outer wall of the fan shaft on the other side of the other rolling bearing.

[0013] Further, connection flanges are provided on the surfaces of the water pump seat and the fan shaft sleeve that are opposite to each other, and the two connection flanges are connected through a second fastening bolt.

[0014] Beneficial effects

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. For the connection structure of the water pump shaft and the fan shaft of the present invention, by placing the water pump pulley in the water pump seat and connecting it with the bearing of the water pump shaft, and connecting the driving flange sleeve, the flange end cover with the fan shaft, and embedding a damping rubber block between the driving flange sleeve and the water pump pulley. During the working process, the belt drives the water pump pulley to rotate, and the torque is transmitted from the water pump pulley to the driving flange sleeve through the damping rubber block, and the torque on the driving flange sleeve is then transmitted to the fan shaft through the flange end cover, so as to drive the fan shaft to rotate, which can effectively reduce vibration and improve the reliability of the entire transmission component.

[0017] 2. In the connection structure between the water pump shaft and the fan shaft of the present invention, the fan shaft sleeve is connected to the water pump seat, and multiple components such as the water pump pulley, the drive flange sleeve, the flange end cover, and the fan shaft are built inside the water pump seat and the fan shaft sleeve, which plays a role in protecting the transmission components. At the same time, a bearing assembly is added between the fan shaft and the fan shaft sleeve, reducing the influence of the bending moment on the bearing of the water pump shaft and further improving the reliability of the entire transmission component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 is a sectional structural schematic diagram of the present invention;

[0020] Figure 3 is a three-dimensional structural schematic diagram of the water pump seat in the present invention;

[0021] Figure 4 is an enlarged sectional structural schematic diagram of the cooperation between the water pump pulley and the drive flange sleeve in the present invention;

[0022] Figure 5 is an enlarged three-dimensional structural schematic diagram of the drive flange sleeve in the present invention;

[0023] Figure 6 is a sectional structural schematic diagram of the cooperation between the fan shaft sleeve and the fan shaft in the present invention.

[0024] Wherein: 1 - bearing of water pump shaft connection, 2 - fan shaft, 3 - water pump seat, 4 - fan shaft sleeve, 5 - water pump pulley, 6 - drive flange sleeve, 7 - damping rubber block, 8 - flange end cover, 9 - positioning seat, 10 - accommodation cavity, 11 - U-shaped avoidance opening, 12 - first positioning cylinder, 13 - pin hole, 14 - pin, 15 - cylindrical shaft, 16 - second positioning cylinder, 17 - first fastening bolt, 18 - rolling bearing, 19 - bearing spacer sleeve, 20 - hole-type snap ring, 21 - shaft-type snap ring, 22 - thrust step surface, 23 - connecting flange, 24 - second fastening bolt, 25 - impeller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present invention will be further described below with reference to the specific embodiments in the drawings.

[0026] Refer to Figure 1-6, A connection structure between a water pump shaft and a fan shaft of the present invention includes a water pump shaft connecting bearing 1 and a fan shaft 2, and also includes a water pump seat 3 and a fan shaft sleeve 4. Among them, the water pump shaft connecting bearing 1 is installed in the water pump seat 3. One end of the water pump shaft connecting bearing 1 is connected with a water pump pulley 5. Inside one end of the water pump pulley 5, there is a driving flange sleeve 6. Between the driving flange sleeve 6 and the water pump pulley 5, there is a damping rubber block 7 embedded. One end of the driving flange sleeve 6 is connected with a detachable flange end cover 8, which is convenient for disassembly and maintenance. One end of the flange end cover 8 is connected with the fan shaft 2 to realize the transmission of force to the fan shaft 2. The fan shaft sleeve 4 is connected with the water pump seat 3. The fan shaft 2 is installed in the fan shaft sleeve 4 through a bearing assembly. And the other end of the fan shaft 2 extends out of the fan shaft sleeve 4, and there is a flange at this end position, and there is a positioning boss on one side of this flange, which is convenient for positioning and fastening when assembling the fan.

[0027] In the connection structure between the water pump shaft and the fan shaft of the present invention, by placing the water pump pulley 5 in the water pump seat 3 and connecting it with the water pump shaft connecting bearing 1, and using the driving flange sleeve 6, the flange end cover 8 to connect with the fan shaft 2, and embedding the damping rubber block 7 between the driving flange sleeve 6 and the water pump pulley 5. During the working process, the belt drives the water pump pulley 5 to rotate, and the torque is transmitted from the water pump pulley 5 to the driving flange sleeve 6 through the damping rubber block 7. The torque on the driving flange sleeve 6 is then transmitted to the fan shaft 2 through the flange end cover 8, realizing the driving of the fan shaft 2 to rotate, which can effectively reduce vibration and improve the reliability of the entire transmission component.

[0028] At the same time, this connection structure uses the fan shaft sleeve 4 to connect with the water pump seat 3, placing multiple components such as the water pump pulley 5, the driving flange sleeve 6, the flange end cover 8 and the fan shaft 2 inside the water pump seat 3 and the fan shaft sleeve 4, playing a role in protecting the transmission components. At the same time, a bearing assembly is added between the fan shaft 2 and the fan shaft sleeve 4, reducing the influence of the bending moment on the water pump shaft connecting bearing, and further improving the reliability of the entire transmission component.

[0029] Preferably, a positioning seat 9 is provided at the center inside the water pump seat 3, and the positioning seat 9 is coaxially arranged with the water pump seat 3. Among them, the water pump shaft-connected bearing 1 is installed in the positioning seat 9. Specifically, a hole coaxially arranged with it is provided at the center of the positioning seat 9, and the water pump shaft-connected bearing 1 is located in this hole. An elastic retaining ring is used in this hole to limit the water pump shaft-connected bearing 1 to prevent its axial movement. Moreover, both ends of the water pump shaft-connected bearing 1 extend to both sides of the positioning seat 9. One end of the water pump shaft-connected bearing 1 is connected to the impeller 25, and the other end is connected to the water pump pulley 5. A receiving cavity 10 for accommodating the water pump pulley 5 is opened in the water pump seat 3 outside the periphery of the positioning seat 9, and the water pump pulley 5 can be wrapped inside the water pump seat 3. A U-shaped avoidance opening 11 is opened at the position on the outer wall of the water pump seat 3 corresponding to the water pump pulley 5, which is convenient for the belt to pass through and be installed on the water pump pulley 5. Further, a reinforcing rib is also provided between the inner wall of the positioning seat 9 and the water pump seat 3 to further improve the structural strength of the water pump seat 3. A flange is provided on one side of the water pump seat 3 away from the water pump pulley 5, which is convenient for the installation of the water pump seat 3, and a reinforcing rib is also provided between the flange and the outer wall of the water pump seat 3 to further improve the structural strength of the water pump seat 3.

[0030] Preferably, a first positioning cylinder 12 is provided at one end of the water pump pulley 5 close to the positioning seat 9. The water pump pulley 5 is of a U-shaped structure, and the first positioning cylinder 12 is located in the U-shaped groove of the water pump pulley 5. An installation hole is opened inside the center of the first positioning cylinder 12, and the water pump shaft-connected bearing 1 is installed in the installation hole. Moreover, the first positioning cylinder 12 is inserted into the jack opened in the positioning seat 9, which is convenient for the water pump pulley 5 to be quickly positioned and installed on the positioning seat 9.

[0031] Preferably, a plurality of uniformly arranged pin holes 13 are provided on the driving flange sleeve 6, and a plurality of uniformly arranged pins 14 are provided on the flange end cover 8. The pins 14 are inserted into the pin holes 13 one by one. By using the cooperation of the pins 14 and the pin holes 13, the transmission of force is realized and a detachable connection is achieved, which is convenient for disassembly, installation and maintenance. Specifically, the pins 14 are T-shaped pins. The largest end of the T-shaped pin is in interference fit with the hole opened on the outer edge of the flange end cover 8, and the smallest end is in clearance fit with the pin hole 13. Further, a split structure in which the driving flange sleeve 6 and the water pump pulley 5 do not contact each other is adopted, and the outer wall of the damping rubber block 7 is attached to the inner wall of the sunk groove opened in the water pump pulley 5. The damping rubber block 7 wraps the left end face and the circumferential face of the driving flange sleeve 6. During production, the water pump pulley 5, the driving flange sleeve 6 and the damping rubber block 7 are vulcanized together, so that the transmission of force only depends on the damping rubber block 7 to be transmitted to the driving flange sleeve 6, and the damping effect is more obvious. Further, a plurality of uniformly arranged cylindrical shafts 15 are provided on the left end face of the driving flange sleeve 6, and each pin hole 13 is correspondingly opened on the cylindrical shaft 15, so that the stressed pins 14 are inserted into different positions of the damping rubber block 7, and the force is more uniform and balanced, further improving the stability and reliability of force transmission.

[0032] Preferably, a second positioning cylinder 16 is provided at one end of the fan shaft 2. The second positioning cylinder 16 is inserted into a jack formed in the center of the flange end cover 8, and the flange end cover 8 is connected to the fan shaft 2 through a first fastening bolt 17, which facilitates the quick positioning and installation of the fan shaft 2 and the flange end cover 8. Moreover, an avoidance groove is formed on the side of the flange end cover 8 away from the fan shaft 2 to prevent the first fastening bolt 17 from interfering with the driving flange sleeve 6.

[0033] Preferably, the bearing assembly includes two rolling bearings 18. The two rolling bearings 18 are installed in the fan shaft sleeve 4. The fan shaft 2 is installed in the inner rings of the two rolling bearings 18. Moreover, a bearing spacer sleeve 19 is provided between the outer rings of the two rolling bearings 18. A limiting structure is further provided between the fan shaft sleeve 4 and the fan shaft 2 on both sides of the two rolling bearings 18 to prevent the two rolling bearings 18 from axially displacing. Specifically, the limiting structure includes two hole-type snap rings 20 and one shaft-type snap ring 21. Among them, the two hole-type snap rings 20 are respectively clamped on the inner walls of the fan shaft sleeves 4 on the other sides of the two rolling bearings 18, the shaft-type snap ring 21 is clamped on the outer wall of the fan shaft 2 on the other side of one of the rolling bearings 18, and a thrust step surface 22 is provided on the outer wall of the fan shaft 2 on the other side of the other rolling bearing 18.

[0034] Preferably, connection flanges 23 are provided on the opposite surfaces of the water pump seat 3 and the fan shaft sleeve 4. The two connection flanges 23 are connected through second fastening bolts 24, which facilitates disassembly, assembly and maintenance.

[0035] The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, which will not affect the implementation effect of the present invention and the practicability of the patent.

Claims

1. A connecting structure between a water pump shaft and a fan shaft, comprising a bearing (1) connected to the water pump shaft and a fan shaft (2), characterized in that It also includes a water pump seat (3) and a fan shaft bushing (4). The water pump shaft-connected bearing (1) is installed in the water pump seat (3). One end of the water pump shaft-connected bearing (1) is connected with a water pump pulley (5). Inside one end of the water pump pulley (5), there is a driving flange sleeve (6). A damping rubber block (7) is embedded between the driving flange sleeve (6) and the water pump pulley (5). One end of the driving flange sleeve (6) is connected with a detachable flange end cover (8). One end of the flange end cover (8) is connected with the fan shaft (2). The fan shaft bushing (4) is connected with the water pump seat (3). The fan shaft (2) is installed in the fan shaft bushing (4) through a bearing assembly. In the center of the inside of the water pump seat (3), there is a positioning seat (9). The water pump shaft-connected bearing (1) is installed in the positioning seat (9). An accommodation cavity (10) for accommodating the water pump pulley (5) is formed in the water pump seat (3) outside the periphery of the positioning seat (9). A U-shaped avoidance opening (11) is formed in the outer wall of the water pump seat (3) corresponding to the position of the water pump pulley (5). One end of the water pump pulley (5) close to the positioning seat (9) is provided with a first positioning cylinder (12). An installation hole is formed in the center inside the first positioning cylinder (12). The water pump shaft-connected bearing (1) is installed in the installation hole, and the first positioning cylinder (12) is inserted into a jack formed in the positioning seat (9). A plurality of uniformly arranged pin holes (13) are formed in the driving flange sleeve (6). A plurality of uniformly arranged pins (14) are formed on the flange end cover (8). The pins (14) are movably inserted into the pin holes (13) one by one.

2. The connection structure of a water pump shaft and a fan shaft according to claim 1, characterized in that, The driving flange sleeve (6) and the water pump pulley (5) are of a non-contact split structure. The outer wall of the damping rubber block (7) fits against the inner wall of a sunk groove formed in the water pump pulley (5). The damping rubber block (7) wraps around the left end face and the circumferential face of the driving flange sleeve (6).

3. The connecting structure of a water pump shaft and a fan shaft according to claim 2, characterized in that, A plurality of uniformly arranged cylindrical shafts (15) are formed on the left end face of the driving flange sleeve (6). Each of the pin holes (13) is correspondingly formed on the cylindrical shaft (15).

4. A connecting structure between a water pump shaft and a fan shaft according to claim 1, characterized in that, One end of the fan shaft (2) is provided with a second positioning cylinder (16). The second positioning cylinder (16) is inserted into a jack formed in the center of the flange end cover (8). The flange end cover (8) is connected with the fan shaft (2) through a first fastening bolt (17).

5. A connection structure between a water pump shaft and a fan shaft according to claim 1, characterized in that, The bearing assembly includes two rolling bearings (18). The two rolling bearings (18) are installed in the fan shaft bushing (4). The fan shaft (2) is installed in the inner rings of the two rolling bearings (18). A bearing spacer sleeve (19) is arranged between the outer rings of the two rolling bearings (18). A limiting structure is also arranged between the fan shaft bushing (4) and the fan shaft (2) on both sides of the two rolling bearings (18).

6. The connection structure between the water pump shaft and the fan shaft according to claim 5, characterized in that, The described limit structure includes two circlips for holes (20) and one circlip for shaft (21). The two circlips for holes (20) are respectively clamped on the inner walls of the fan shaft sleeves (4) on the other sides of the two rolling bearings (18). The circlip for shaft (21) is clamped on the outer wall of the fan shaft (2) on the other side of one of the rolling bearings (18), and a thrust step surface (22) is provided on the outer wall of the fan shaft (2) on the other side of the other rolling bearing (18).

7. A connecting structure between a water pump shaft and a fan shaft according to any one of claims 1-6, characterized in that On the opposite surfaces of the water pump seat (3) and the fan shaft sleeve (4) that are butt - jointed, connection flanges (23) are provided, and the two connection flanges (23) are connected by second fastening bolts (24).

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