Reversing fan capable of blowing forward and backward

Abstract

The utility model provides a reversing fan capable of blowing air forwards and reversely, and belongs to the technical field of engine cooling fans. A plurality of lifting rotating devices are fixedly arranged on the piston, each lifting rotating device comprises a lifting limiting block and a sliding block, a moving groove is formed in each lifting limiting block, the sliding blocks are arranged in the moving grooves in a sliding mode, and the sliding blocks and the transmission blocks are connected in a one-to-one correspondence mode; each lifting rotating device comprises a lifting limiting block and a sliding block, each lifting rotating device comprises a lifting limiting block and a sliding block, the sliding blocks move in the limiting blocks, each lifting rotating device can be independently replaced after being damaged, the maintenance cost is low, installation of the multiple sliding blocks does not need to be met at the same time in the installation process, and the installation precision is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of engine cooling fan equipment, and concretely relates to a reversing fan of positive and negative air blowing. BACKGROUND

[0002] In the technical field of engine cooling fan, the airflow generated by the engine cooling fan is along one direction for radiator heat dissipation, and the airflow direction is same with the airflow direction in the process of vehicle driving, and the airflow flows from the outside of the vehicle to the engine. When the dirty and sundry outside the vehicle enter the vehicle along the airflow direction in the process of vehicle driving, the radiator is easily blocked by the dirty and sundry on the outer surface of the radiator. Especially for the agricultural machinery such as harvester, the working environment is poor when working in the field, and the outer surface of the radiator is often blocked by the cut leaves and grass, which leads to poor heat dissipation and causes the engine temperature to be too high. At this time, it is necessary to stop the machine and clean the sundry on the radiator, which seriously affects the efficiency of the user's busy harvest and reduces the use experience. The current domestic patent: a variable angle fan (patent number: CN 205840980 U) provides a kind of airflow direction change by positive and negative angle adjustment of fan blade, to remove the sundry attached to the surface of the engine, to realize the effect of automatic cleaning of radiator. The patent relies on a ring limiting plate and a plurality of cylindrical limiting blocks, the sizes of the plurality of cylindrical limiting blocks are consistent, to prevent the ring limiting plate from being unstable during installation, once the limiting plate or the limiting block is damaged, the rotating angle of the fan blade cannot be realized, the reliability is low, there are many types of parts, the cost is high, secondly, the structure of this scheme is complex, the installation precision requirement is high, and the use and maintenance cost is high.

[0003] Therefore, there is an urgent need for a reversing fan with high reliability, small installation difficulty and low cost. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model utilizes the sliding block to be slidably arranged in the moving groove, drives the transmission block to rotate when the piston is lifted, each lifting and rotating device is matched with a sliding block, replacement is facilitated, installation difficulty is small, and cost is low.

[0005] The technical scheme of the utility model is as follows: a reversing fan of positive and negative air blowing, comprising a piston, a plurality of transmission blocks, a plurality of lifting and rotating devices, the plurality of lifting and rotating devices are fixedly arranged on the piston, the lifting and rotating device comprises a lifting limiting block and a sliding block, the lifting limiting block is provided with a moving groove, the sliding block is slidably arranged in the moving groove, and the sliding block and the transmission block are one-to-one correspondingly connected.

[0006] On the basis of the above technical scheme, preferably, the transmission block is connected with a fan blade shaft, a driving pin is arranged between the transmission block and the sliding block, and the axis line of the driving pin and the fan blade shaft does not coincide.

[0007] On the basis of the above technical scheme, preferably, the moving groove is arranged on one side of the lifting limiting block, and the moving groove is arranged in parallel with the end face of the piston.

[0008] On the basis of the above technical scheme, preferably, the lifting limiting blocks are evenly arranged around the axis of the piston, the two ends of the lifting limiting block are provided with a pressing edge, the side, away from the lifting limiting block, of the pressing edge is provided with a curved surface, and the screw is fixedly arranged on the piston by abutting against the curved surface.

[0009] On the basis of the above technical scheme, preferably, the device further comprises a piston cylinder, a shell and a cylinder cover, the piston is arranged in the piston cylinder, and the shell is arranged between the piston cylinder and the cylinder cover.

[0010] On the basis of the above technical scheme, preferably, a return spring is arranged between the piston and the cylinder cover.

[0011] On the basis of the above technical scheme, preferably, one end of the fan blade shaft is arranged to pass through the shell and extend into the shell.

[0012] On the basis of the above technical scheme, preferably, a bearing is arranged between the fan blade shaft and the shell, and a fan blade is arranged at the end, away from the shell, of the fan blade shaft.

[0013] The reversing fan of the present application has the following advantages over the prior art:

[0014] The lifting rotating devices are multiple, each lifting rotating device comprises a lifting limiting block and a sliding block, the sliding block moves in the limiting block, each lifting rotating device can be replaced individually after being damaged, the maintenance cost is low, the installation process does not need to simultaneously satisfy the installation of multiple sliding blocks, and the installation precision is higher;

[0015] The screw is fixedly arranged on the piston by the pressing edge, and moves up and down along with the piston, when the lifting limiting block moves up and down along with the piston, the sliding block moves back and forth in the moving groove, drives the transmission block to rotate, drives the fan blade shaft to rotate, drives the fan blade to rotate, and the direction of the fan wind is changed. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a front view of the reversing fan of the present application.

[0018] Figure 2 The utility model discloses Figure 1 A sectional view of the utility model is shown in the figure.

[0019] Figure 3 The utility model discloses Figure 1 A partial structure schematic diagram of the utility model is shown in the figure.

[0020] Figure 4 The utility model discloses Figure 3 A partial enlarged view of the utility model is shown in the figure.

[0021] Figure 5 The utility model discloses Figure 1 A partial structure schematic diagram of the utility model is shown in the figure.

[0022] Figure 6 A perspective view of the utility model lifting limiting block is shown in the figure. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] As Figures 1-6 shown, a reversing fan of forward and reverse blowing includes a piston 2, a plurality of transmission blocks 71, and a plurality of lifting rotating devices 3. The plurality of lifting rotating devices are fixedly arranged on the piston 2. The lifting rotating device 3 includes a lifting limiting block 31 and a sliding block 32. The lifting limiting block 31 is provided with a moving groove 311. The sliding block 32 is slidingly arranged in the moving groove 311. The sliding block 32 is in one-to-one correspondence with the transmission block 71. The lifting rotating device 3 includes a plurality of lifting limiting blocks 31 and sliding blocks 32. The lifting rotating device 3 includes a plurality of lifting limiting blocks 31 and sliding blocks 32. The sliding block 32 moves in the limiting block 31. Each lifting rotating device 3 can be replaced individually after being damaged. The maintenance cost is low. The installation process does not need to simultaneously satisfy the installation of a plurality of sliding blocks 32. The installation precision is higher.

[0025] The transmission block 71 is connected with a fan blade shaft 7. The transmission block 71 and the sliding block 32 are provided with a driving pin 72. The axis of the driving pin 72 does not coincide with the fan blade shaft 7. The transmission block 71 is cylindrical in the embodiment. The shape of the transmission block 71 is not limited to a cylinder, but can also be a cuboid.

[0026] The moving groove 311 is arranged on one side of the lifting limiting block 31, and is arranged in parallel with the end surface of the piston 2. The moving groove 311 is arranged in parallel with the end surface of the piston 2, and the moving direction of the sliding block 32 arranged in the moving groove 311 is parallel to the end surface of the piston 2.

[0027] The lifting limiting block 31 is arranged uniformly around the axis of the piston 2, and the two ends of the lifting limiting block 31 are provided with pressing edges 312. The pressing edge 312 is provided with an arc surface 313 on the side away from the lifting limiting block 31, and the screw is fixed to the piston 2 by abutting against the arc surface 313. The screw is arranged on the piston 2 by the pressing edge 312, and is lifted along with the piston 2. When the lifting limiting block 31 is lifted along with the piston 2, the sliding block 32 moves back and forth in the moving groove 311, drives the transmission block 71 to rotate, and the rotation of the transmission block 71 drives the fan blade shaft 7 to rotate, drives the fan blade 74 to rotate, and changes the direction of the fan wind.

[0028] The fan also comprises a piston cylinder 1, a shell 6 and a cylinder cover 5. The piston 2 is arranged in the piston cylinder 1, and the shell 6 is arranged between the piston cylinder 1 and the cylinder cover 5.

[0029] The piston 2 is provided with a reset spring 4 between the piston 2 and the cylinder cover 5. The reset spring 4 is used for assisting the piston 2 to reset, realizing the rotation of the fan blade 74, avoiding that the piston 2 cannot reset, the fan blade 74 cannot rotate, and the reverse blowing cannot be realized.

[0030] One end of the fan blade shaft 7 provided with the transmission block 71 penetrates into the shell 6. The fan blade shaft 7 is provided with a bearing 73 between the fan blade shaft 7 and the shell 6, and the fan blade shaft 7 is provided with the fan blade 74 on the end away from the shell 6. The bearing 73 reduces the friction between the fan blade shaft 7 and the shell 6 when the fan blade shaft 7 rotates, reduces the damage of the fan blade shaft 7, and reduces the energy loss.

[0031] The above only describes the preferred embodiments of the utility model, and does not limit the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A reversing fan with forward and reverse blowing, comprising a piston (2), a number of transmission blocks (71), characterized in that: Also include several lifting rotary devices (3), several lifting rotary devices are fixedly arranged on the piston (2), the lifting rotary device (3) includes lifting limit block (31) and sliding block (32), the lifting limit block (31) is provided with moving groove (311), the sliding block (32) is slidably arranged in the moving groove (311), the sliding block (32) is connected with the transmission block (71) one by one.

2. A reversing fan for bi-directional air blowing as claimed in claim 1, wherein: The transmission block (71) is connected with the fan shaft (7), and the transmission block (71) and the sliding block (32) are provided with driving pin (72), the driving pin (72) and the axis of the fan shaft (7) are not coincident.

3. A reversing fan for bi-directional air blowing as claimed in claim 1, wherein: The moving groove (311) is arranged on the side of the lifting limit block (31), and the moving groove (311) is arranged in parallel with the end surface of the piston (2).

4. A reversing fan for bi-directional air blowing as defined in claim 1, wherein: Several lifting limit blocks (31) are uniformly arranged around the axis of the piston (2), both ends of the lifting limit block (31) are provided with the pressing edge (312), the side, away from the lifting limit block (31), of the pressing edge (312) is provided with the arc surface (313), and the screw is fixedly arranged on the piston (2) by abutting against the arc surface (313).

5. A reversing fan for bi-directional air blowing as defined in claim 2, wherein: Also include piston cylinder (1), shell (6) and cylinder cover (5), the piston (2) is arranged in the piston cylinder (1), the shell (6) is arranged between the piston cylinder (1) and the cylinder cover (5).

6. A reversing fan for forward and reverse air flow as claimed in claim 5 wherein: The piston (2) and the cylinder cover (5) are provided with return spring (4).

7. A reversing fan for positive and negative air flow as defined in claim 5, wherein: One end of the fan shaft (7) provided with the transmission block (71) penetrates the shell (6) and extends into the shell (6).

8. A reversing fan for bi-directional air blowing as defined in claim 5, wherein: The fan shaft (7) and the shell (6) are provided with bearing (73), and the end, away from the shell (6), of the fan shaft (7) is provided with fan blade (74).

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