Reliable hydraulic reversing fan

Abstract

The utility model discloses a reliable hydraulic commutating fan belongs to the technical field of commutating fan for vehicle, the commutating fan includes the oil cylinder subassembly and multiple sets of fan blade subassembly, the oil cylinder subassembly includes the oil cylinder piston and the oil cylinder cylinder body of airtight sliding connection, the outer periphery of oil cylinder cylinder body is opened a circle limit sliding slot along the circumference, the fan blade fixed seat is assembled and fixed to oil cylinder subassembly, a plurality of radial fan blade fixed holes are evenly opened to fan blade fixed seat on the fan blade fixed seat along the axial direction, the number of fan blade fixed hole is same with the number of fan blade subassembly, the fan blade axle of multiple sets of fan blade subassembly respectively passes through the fan blade fixed hole of corresponding fan blade fixed seat and is connected through the bearing rotation, and the end of fan blade axle eccentricity is provided with eccentric column, and the eccentric column inserts in the limit sliding slot of oil cylinder cylinder body, and can slide along the limit sliding slot. The utility model patent designs commutating fan assembly simple and convenient, and reliable stable work.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive commutator fans, specifically relating to a reliable hydraulic commutator fan. Background Technology

[0002] Commutating fans are widely used in automobiles, ships, and other fields. During operation, they cool the engine system and periodically clean inhaled dust and debris. The fan's reversing direction switches between inward cooling and outward cleaning. Currently, hydraulic commutating fans used in agricultural machinery that are already on the market or publicly reported in China share the following drawbacks: 1. Insufficient exhaust capacity after reversing, resulting in low efficiency. 2. Inefficient overall structure; the fan reversing mechanism is driven by gears, which can easily lead to jamming, oil leakage, or even direct hydraulic oil leakage. 3. Complex manufacturing and assembly, resulting in low production efficiency and high production costs. 4. Frequent maintenance and upkeep, severe gear wear, and a short service life. Utility Model Content

[0003] The purpose of this invention is to provide a reliable hydraulic commutator fan to solve the problem of poor performance of existing commutator fans mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a reliable hydraulic reversing fan, the reversing fan comprising a hydraulic cylinder assembly and multiple sets of fan blade assemblies, the hydraulic cylinder assembly comprising a cylinder piston and a cylinder body connected in a sealed sliding manner, a limiting groove being formed around the outer periphery of the cylinder body, multiple axially connected assembly grooves being evenly distributed on the limiting groove, the top of the assembly groove having an assembly slot opening on the top surface of the cylinder body, and the assembly being assembled on the cylinder piston of the cylinder assembly. A ring-shaped fan blade fixing seat is fixed, located on the radial outer side of the cylinder body. The fan blade fixing seat has multiple radially penetrating fan blade fixing holes evenly distributed along the circumference. The number of fan blade fixing holes is the same as the number of fan blade assemblies. The fan blade shafts of the multiple sets of fan blade assemblies pass through the corresponding fan blade fixing holes of the fan blade fixing seat and are rotatably connected to them through bearings. An eccentric column is eccentrically provided at the end of the fan blade shaft. The eccentric column is inserted into the limiting slide groove of the cylinder body and can slide along the limiting slide groove.

[0005] Preferably, the hydraulic cylinder piston includes a piston cylinder and a piston body. The piston body is integrally formed axially on the inner side of the bottom surface of the piston cylinder. The hydraulic cylinder is slidably connected to the piston cylinder of the hydraulic cylinder piston. The piston body of the hydraulic cylinder piston is slidably inserted into the cylinder cavity of the hydraulic cylinder and sealed therewith. The top of the piston body and the bottom surface of the hydraulic cylinder form a piston cavity. An axially connected oil injection cavity is opened inside the piston body. The inner and outer ends of the oil injection cavity are respectively opened with a piston cavity oil inlet and an oil inlet shaft assembly port. An oil inlet shaft is inserted and assembled into the oil injection cavity from the oil inlet shaft assembly port side. The oil inlet shaft is rotatably connected to the oil injection cavity through a bearing assembly.

[0006] Preferably, the height of the piston cylinder wall of the hydraulic cylinder piston is less than the height of the piston body. The top of the piston cylinder wall is turned outward and integrally formed with a connecting flange. One end of the fan blade fixing seat is bolted to the connecting flange of the piston cylinder, and the other end of the fan blade fixing seat is bolted to a disc-shaped end cap.

[0007] Preferably, the cylinder body has multiple axial blind holes evenly distributed in its cylinder wall. The axial blind holes open on the bottom surface of the cylinder body, and a return spring is provided in each axial blind hole. The outer end of the return spring abuts against the inner surface of the end cover.

[0008] Preferably, the upper half of the oil injection chamber of the piston body is fixedly connected to a bearing seat and is rotatably connected to the oil inlet shaft through two sets of deep groove ball bearings arranged side by side. The lower half of the oil injection chamber is fixedly connected to a sealing valve seat. The sealing valve seat has a stepped cavity opened along the axial direction inside, and a sealing valve body is arranged inside it. A compression spring is arranged between the bottom surface of the sealing valve body and the bottom surface of the sealing valve seat. The top surface of the sealing valve body is in close contact with the bottom surface of the oil inlet shaft.

[0009] Preferably, the outer circumference of the oil inlet shaft is integrally formed with an annular retaining ring, which engages with the outer side of the bearing seat of the oil injection chamber of the piston body, and is blocked by a retaining ring bolted to the bottom surface of the piston cylinder.

[0010] Preferably, a resilient cylindrical pin is inserted between the sealing valve seat and the sealing valve body for limiting the position.

[0011] Preferably, the outer periphery of the cylinder body is a regular hexagonal prism, and the inner side of the piston cylinder wall is also a regular hexagon. The number of assembly slots is also six, which are respectively arranged along the center lines of the six outer faces of the cylinder body. The fan blade fixing seat is evenly provided with six fan blade fixing holes, and the axis of the six fan blade fixing holes is respectively aligned with the center lines of the six outer faces of the cylinder body. The fan blade assembly is also provided with six sets.

[0012] Preferably, the fan blade shaft of the fan blade assembly is fixed to the fan blade by bolts, the inner end of the fan blade shaft is rotatably connected to the fan blade fixing seat by a thrust ball bearing, and the shaft body is rotatably connected to the fan blade fixing seat by a bushing.

[0013] Preferably, the outer side of the eccentric column is fitted with a cylindrical pin sleeve that is rotatably connected to the limiting slide groove.

[0014] Compared with the prior art, the improvement of the reliable hydraulic commutator fan provided by this utility model is as follows:

[0015] 1. Long service life: The entire device of this invention is corrosion-free. The eccentric column at the end of the fan blade assembly is fitted with a pin sleeve, which is slidably and rotatably connected to the limiting groove of the cylinder body. When the cylinder body moves up and down, driving the eccentric column to move, the friction force is small and the friction loss is negligible, which greatly extends the service life of the commutating fan.

[0016] 2. Safe and reliable: The entire device of this invention experiences minimal vibration and impact during operation, has a good overall sealing effect, and is dustproof and waterproof.

[0017] 3. Wide range of applications: The entire device of this invention is applicable to various agricultural machinery, mining machinery, etc. in harsh environments such as dust.

[0018] 4. Low energy consumption: The entire device of this invention has a compact structure with no unnecessary moving or rotating parts, resulting in minimal energy loss due to friction.

[0019] 5. Convenient production, installation and maintenance: The entire device of this invention is simple to produce and assemble. The cylinder piston of the hydraulic cylinder assembly is an integrally formed structure, which simplifies the assembly structure of the cylinder. The six sets of fan blade assemblies are connected to the cylinder assembly through the fan blade fixing seat. The fan blade shaft is connected to the fan blade fixing seat through the bushing and a set of thrust ball bearings. The assembly is convenient, the connection is stable, and the maintenance and repair efficiency is high. Attached Figure Description

[0020] Figure 1 A front view schematic diagram of a reliable hydraulically commutating fan;

[0021] Figure 2 A side view of a reliable hydraulically commutating fan.

[0022] Figure 3 for Figure 1 A schematic diagram of the AA-direction cross-sectional structure;

[0023] Figure 4 for Figure 1 Schematic diagram of the BB-direction cross-section structure;

[0024] Figure 5 This is a schematic diagram of the fan blade assembly.

[0025] Figure 6 This is a schematic diagram of the structure of a hydraulic cylinder assembly;

[0026] Figure 7 This is a cross-sectional structural diagram of a hydraulic cylinder assembly.

[0027] In the diagram: 1. Cylinder piston, 2. Cylinder body, 3. Fan blade fixing seat, 4. Fan blade, 5. Fan blade shaft, 6. End cover, 7. Oil inlet shaft, 11. Piston body, 12. Piston body, 13. Connecting flange, 14. Retaining ring, 15. Bearing seat, 16. Deep groove ball bearing, 17. Sealing valve seat, 18. Sealing valve body, 19. Compression spring, 21. Limiting groove, 22. Assembly groove, 23. Axial blind hole, 24. Return spring, 51. Eccentric column, 52. Cylindrical pin sleeve, 53. Thrust ball bearing, 54. Bushing. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 7 As shown, this utility model provides an embodiment of a reliable hydraulic reversing fan. In this embodiment, the reversing fan includes a hydraulic cylinder assembly and six sets of fan blade assemblies.

[0030] The hydraulic cylinder assembly includes a cylinder piston 1, a cylinder body 2, and an oil inlet shaft 7, which are connected in a sealed sliding manner. The cylinder piston 1 includes a piston cylinder 11 and a piston body 12. The piston body 12 is integrally formed with the piston cylinder 11 along the axial direction at the center of the inner side of the bottom surface of the piston cylinder 11. The inner side of the cylinder wall of the piston cylinder 11 is hexagonal, and the outer periphery of the corresponding cylinder body 2 is hexagonal prism. The cylinder body 2 is slidably connected to the piston cylinder 11 of the cylinder piston 1. The piston body 12 of the cylinder piston 1 is slidably inserted into the cylinder cavity of the cylinder body 2 and is sealed to it by an embedded Y-shaped rubber sealing ring. The top of the piston body 12 and the bottom surface of the cylinder body 2 form a piston cavity.

[0031] The piston body 12 has an axially connected oil injection chamber inside. The inner and outer ends of the oil injection chamber have piston chamber inlets and oil inlet shaft assembly ports, respectively. The oil injection chamber is a stepped chamber. A bearing seat 15 is fixedly connected to the upper half of the chamber near the oil inlet shaft assembly port. The oil inlet shaft 7 is inserted into the oil injection chamber through the oil inlet shaft assembly port and is rotatably connected to the bearing seat 15 via two sets of deep groove ball bearings 16 arranged side-by-side. An annular retaining ring is integrally formed on the outer circumference of the oil inlet shaft 7. The retaining ring engages with the outer side of the bearing seat 15 in the oil injection chamber of the piston body 12 and is blocked by a retaining ring 14 bolted to the bottom surface of the piston cylinder 11, preventing the oil inlet shaft 7 from dislodging from the oil injection chamber. A sealing valve seat 17 is fixedly connected to the lower half of the oil injection chamber near the piston chamber inlet. Two O-ring rubber seals are embedded on the outer surface of the sealing valve seat 17, providing a sealed connection with the oil injection chamber. The sealing valve seat 17 has a stepped cavity along the axial direction inside, within which a sealing valve body 18 is housed. Multiple O-rings are also fitted around the outer periphery of the sealing valve body 18 to form a tight seal with the sealing valve seat 17. The upper end face of the sealing valve body 18 is turned outward to form an edge, and two elastic cylindrical pins are symmetrically arranged at the edge and inserted into the sealing valve seat 18 to prevent relative rotation between the sealing valve body 18 and the sealing valve seat 17 during the rotation of the reversing fan. A compression spring 19 is installed between the bottom surface of the sealing valve body 18 and the inner side of the bottom surface of the sealing valve seat 17. The compression spring 19 pushes the sealing valve body 18 upward, causing its top surface to tightly abut against the bottom surface of the oil inlet shaft 7.

[0032] The height of the piston cylinder 11 of the hydraulic cylinder piston 1 is less than the height of the piston body 12. The top of the piston cylinder 11 is turned outward and integrally formed with a connecting flange 12. A fan blade fixing seat 3 is assembled and fixed on the connecting flange 12 by bolts. The fan blade fixing seat 3 is a cylindrical ring structure with six radially through fan blade shaft fixing holes evenly distributed on it. The six fan blade shaft fixing holes are radially corresponding to the center lines of the six facets of the hydraulic cylinder. A disc-shaped end cap 6 is fixed to the other end of the fan blade fixing seat 3 by bolts. O-rings are provided at the upper and lower ends of the fan blade fixing seat 3 to seal the piston cylinder 11 and the end cap 6.

[0033] A limiting groove 21 is circumferentially formed on the outer periphery of the cylinder body 1. At the center lines of the six facets of the limiting groove 21, axially formed assembly grooves 22 extend axially to the bottom surface of the cylinder body to form assembly openings. Multiple axial blind holes 23 are evenly distributed in the cylinder wall of the cylinder body 1. The axial blind holes 23 open at the bottom surface of the cylinder body 1, and a return spring 24 is installed within each axial blind hole 23. The outer end of the return spring 24 abuts against the inner surface of the end cover 6.

[0034] The fan blade assembly includes fan blades 4 and fan blade shafts 5. The fan blade shaft 5 is assembled and fixed to the fan blades 4 by pressure blocks and fixing bolts. An eccentric post 51 is eccentrically provided at the end of the fan blade shaft, and a cylindrical pin sleeve 52 is sleeved on the outer side of the eccentric post 51. The fan blade shafts 5 of the six fan blade assemblies pass through the six fan blade fixing holes of the fan blade fixing seat 3, respectively. The inner end of the fan blade shaft 5 is rotatably connected to the fan blade fixing seat 3 through a thrust ball bearing 53, and the shaft body is rotatably connected to the fan blade fixing seat 3 through a bushing 54, and is sealed with an embedded O-ring rubber seal. The eccentric post 51 at the end of the fan blade shaft 5 is inserted into the limiting slide groove 21 on the outer periphery of the piston cylinder 2 and can slide along the limiting slide groove 21.

[0035] In this embodiment, a reliable commutator fan operates by connecting the outer end of the oil inlet shaft to the hydraulic oil pump via an oil inlet pipe. After pressurization, the hydraulic oil enters the piston chamber between the piston body 12 and the bottom surface of the cylinder body 2 through the oil inlet shaft 7, the sealing valve body 18, and the piston chamber inlet of the piston body 12. This pushes the cylinder body 2 to move upward. When the cylinder body 2 moves upward, it drives the eccentric column 51 of the fan blade assembly to make an arc motion around the axis of the fan blade shaft 5 via the limiting slide groove 21. This causes the fan blade shaft 5 to rotate and ultimately drives the fan blade 4 to flip, thus realizing one commutation of the commutator fan. When the reversing fan needs to reverse direction again, the hydraulic pump shuts off and stops pressurizing. Under the push of multiple reset springs 24 at the bottom of the cylinder body 2, the cylinder body 2 moves downward to reset. When the cylinder body 2 moves downward, it drives the eccentric column 51 to make a circular arc motion in the opposite direction with the axis of the fan blade shaft 5 as the center through the limit slide groove 21, thereby driving the fan blade shaft 5 to rotate in the opposite direction, and finally driving the fan blade 4 to flip in the opposite direction, realizing the reversing of the reversing fan.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reliable hydraulic commutating fan, characterized in that, The commutator fan includes a hydraulic cylinder assembly and multiple sets of fan blade assemblies. The hydraulic cylinder assembly includes a cylinder piston and a cylinder body that are connected in a sealed sliding manner. A limiting groove is formed around the outer periphery of the cylinder body. Multiple assembly slots that are axially connected to the limiting groove are evenly distributed on the limiting groove. The top of the assembly slot has an assembly slot opening on the top surface of the cylinder body. An annular fan blade fixing seat is assembled and fixed on the cylinder piston of the hydraulic cylinder assembly. The fan blade fixing seat is located on the radially outer side of the cylinder body. Multiple radially penetrating fan blade fixing holes are evenly distributed around the fan blade fixing seat. The number of fan blade fixing holes is the same as the number of fan blade assemblies. The fan blade shafts of the multiple sets of fan blade assemblies pass through the corresponding fan blade fixing holes of the fan blade fixing seats and are rotatably connected to them through bearings. An eccentric column is eccentrically provided at the end of the fan blade shaft. The eccentric column is inserted into the limiting groove of the cylinder body and can slide along the limiting groove.

2. The reliable hydraulic commutating fan according to claim 1, characterized in that: The hydraulic cylinder piston includes a piston cylinder and a piston body. The piston body is integrally formed with the piston cylinder along the axial direction on the inner side of the bottom surface of the piston cylinder. The hydraulic cylinder is slidably connected to the piston cylinder of the hydraulic cylinder piston. The piston body of the hydraulic cylinder piston is slidably inserted into the cylinder cavity of the hydraulic cylinder and sealed to it. The top of the piston body and the bottom surface of the hydraulic cylinder form a piston cavity. An axially connected oil injection cavity is opened inside the piston body. The inner and outer ends of the oil injection cavity are respectively opened with a piston cavity oil inlet and an oil inlet shaft assembly port. An oil inlet shaft is inserted and assembled into the oil injection cavity from the oil inlet shaft assembly port side. The oil inlet shaft is rotatably connected to the oil injection cavity through a bearing assembly.

3. A reliable hydraulic commutator fan according to claim 2, characterized in that: The height of the piston cylinder wall of the oil cylinder piston is less than the height of the piston body. The top of the piston cylinder wall is turned outward and integrally formed with a connecting flange. One end of the fan blade fixing seat is fixed to the connecting flange of the piston cylinder by bolts, and the other end of the fan blade fixing seat is fixed with a disc-shaped end cap by bolts.

4. A reliable hydraulic commutating fan according to claim 3, characterized in that: Multiple axial blind holes are evenly distributed in the cylinder wall of the cylinder body. The axial blind holes open on the bottom surface of the cylinder body. A return spring is installed in the axial blind hole, and the outer end of the return spring abuts against the inner surface of the end cover.

5. A reliable hydraulic commutating fan according to claim 4, characterized in that: The upper half of the oil injection chamber of the piston body is fixedly connected to a bearing seat and is rotatably connected to the oil inlet shaft through two sets of deep groove ball bearings arranged side by side. The lower half of the oil injection chamber is fixedly connected to a sealing valve seat. The sealing valve seat has a stepped cavity opened along the axial direction inside, and a sealing valve body is installed inside. A compression spring is installed between the bottom surface of the sealing valve body and the bottom surface of the sealing valve seat. The top surface of the sealing valve body is in close contact with the bottom surface of the oil inlet shaft.

6. A reliable hydraulic commutating fan according to claim 5, characterized in that: The outer circumference of the oil inlet shaft is integrally formed with an annular retaining ring. The retaining ring is engaged with the outer side of the bearing seat of the oil injection chamber of the piston body and is blocked by a retaining ring bolted to the bottom surface of the piston cylinder.

7. A reliable hydraulic commutating fan according to claim 6, characterized in that: A flexible cylindrical pin is inserted between the sealing valve seat and the sealing valve body for limiting the position.

8. A reliable hydraulic commutating fan according to claim 7, characterized in that: The outer periphery of the cylinder body is a regular hexagonal prism, and the inner side of the piston cylinder wall is also a regular hexagon. There are six assembly slots, which are respectively arranged along the center lines of the six outer faces of the cylinder body. Six fan blade fixing holes are evenly distributed on the fan blade fixing seat, and the axis of the six fan blade fixing holes is aligned with the center lines of the six outer faces of the cylinder body. There are also six sets of fan blade assemblies.

9. A reliable hydraulic commutating fan according to claim 8, characterized in that: The fan blade shaft of the fan blade assembly is fixed to the fan blade by bolts. The inner end of the fan blade shaft is rotatably connected to the fan blade mounting seat by a thrust ball bearing. The shaft body is rotatably connected to the fan blade mounting seat by a bushing.

10. A reliable hydraulic commutating fan according to claim 9, characterized in that: The outer side of the eccentric column is fitted with a cylindrical pin sleeve that is rotatably connected to the limiting slide groove.

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