Blade for negative pressure fan
By designing an adjustable negative pressure fan blade structure, the problem of fixed blade length in existing systems has been solved, enabling flexible adjustment and fixation of the fan blade length, thus improving the fan's applicability and ventilation effect in diverse scenarios.
Patent Information
- Application Number
- CN202520355349.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-03
AI Technical Summary
The existing negative pressure fan blades have a fixed length, which cannot be flexibly adjusted according to the size of the space and the ventilation requirements, thus limiting their application in diverse scenarios.
An adjustable negative pressure fan blade structure was designed. Through the combination of components such as the first blade, the second blade, the mounting plate, the connecting plate, and the adjusting rod, the blade length can be precisely adjusted and fixed to adapt to the ventilation needs of different scenarios.
It enables flexible adjustment of the fan blade length, improves the applicability and ventilation effect of the fan in different scenarios, optimizes the ventilation effect, and can effectively fix the adjusted length to ensure stable use.
Smart Images
Figure CN223754313U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to negative pressure fan technical field, concretely is a kind of blade for negative pressure fan. BACKGROUND
[0002] Negative pressure fan is a kind of common ventilation equipment, is widely used in industrial plant, agricultural greenhouse, livestock farm and so on. Its working principle is to drive blade rotation by motor, forms negative pressure in fan, to discharge indoor air, realizes the purpose of ventilation. Blade as the key component of negative pressure fan, its performance directly influences the ventilation efficiency of fan, energy consumption and operating stability, the length of existing negative pressure fan blade is usually fixed, cannot be flexibly changed according to space size, ventilation demand and so on, limits the application of negative pressure fan in diversified scene. SUMMARY
[0003] In view of the deficiencies of prior art, the utility model provides a kind of blade for negative pressure fan to solve the problems presented in the above background art:
[0004] The length of existing negative pressure fan blade is usually fixed, cannot be flexibly changed according to space size, ventilation demand and so on, limits the application of negative pressure fan in diversified scene.
[0005] To achieve the above object, the utility model is realized by the following technical scheme:
[0006] A kind of blade for negative pressure fan, including fan shaft, the outer side of the fan shaft is fixedly connected with first fan leaf, the outer side of the first fan leaf is slidably connected with second fan leaf, the outer side of the fan shaft is fixedly connected with mounting plate, the outer side of the mounting plate is fixedly connected with fixed plate, the outer side of the end of the fan shaft away from first fan leaf is rotatably connected with first connecting plate, the side of the first connecting plate away from mounting plate is fixedly connected with first connecting ring, the side of the first connecting ring away from first connecting plate is equipped with a plurality of fixed holes, the outer side of the end of the fan shaft away from first connecting ring is slidably connected with second connecting ring, the side of the second connecting ring is fixedly connected with fixed rod against symmetry.
[0007] Preferably, the side of the fixed plate is equipped with the sliding slot passing through its surface, the inside of the sliding slot is slidably connected with connecting column, the end of the connecting column is fixedly connected with second fan leaf.
[0008] Preferably, the end of the connecting column away from second fan leaf is fixedly connected with moving plate.
[0009] Preferably, the outer side of the first connecting plate is rotatably connected with adjusting rod, the end of the adjusting rod away from first connecting plate is rotatably connected with moving plate.
[0010] Preferably, the inside of the fan shaft is fixedly connected with a slide rod, and the outside of the slide rod is slidably connected with a clamping block.
[0011] Preferably, the side of the clamping block and the fan shaft are fixedly connected with a spring.
[0012] Preferably, one end of the clamping block is fixedly connected with a second connecting plate.
[0013] The utility model provides a kind of blade for negative pressure fan.Compared with prior art, it has the following beneficial effects:
[0014] 1、The blade for negative pressure fan, by setting first leaf, second leaf, mounting plate, first connecting plate, adjusting rod, fixed plate, sliding slot, connecting column, moving plate, first connecting ring and fan shaft, the function of adjusting the length of fan blade is realized, rotate first connecting ring, first connecting ring rotates with first connecting plate, first connecting plate rotates with the outside adjusting rod, adjusting rod moves with connecting column in the inside of sliding slot by moving plate, connecting column moves with second leaf along the outside of first leaf, the length of fan blade is adjusted, can be accurately adjusted blade length according to actual space and ventilation demand, greatly improve the applicability of fan in different scenarios, optimize ventilation effect.
[0015] 2、The blade for negative pressure fan, by setting first connecting ring, fixed hole, fixed rod, second connecting ring, clamping block, slide rod, spring, second connecting plate and mounting plate, the function that fixed rod is fixed in fixed hole is realized, prevent first connecting ring from rotating when using, the length of adjusted fan blade is fixed, so that staff can better use fan blade. ACCURACY OF DRAWINGS
[0016] Figure 1 It is the inside structure schematic view of the fan shaft of the utility model.
[0017] Figure 2 It is the three-dimensional structure schematic view of the utility model.
[0018] Figure 3 It is the rear view of the utility model.
[0019] Figure 4 It is the enlarged structure schematic view of local part A in the utility model.
[0020] In the drawing: 1, fan shaft;2, first leaf;3, second leaf;4, first connecting plate;5, fixed plate;6, sliding slot;7, connecting column;8, moving plate;9, adjusting rod;10, first connecting ring;11, fixed hole;12, fixed rod;13, second connecting ring;14, clamping block;15, slide rod;16, spring;17, second connecting plate;18, mounting plate. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in 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 in 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.
[0022] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a kind of blade for negative pressure fan, fan shaft 1 is fixedly connected with first fan leaf 2 on the outside, second fan leaf 3 is slidably connected with the outside of first fan leaf 2, second fan leaf 3 moves along the outside of first fan leaf 2, the length of fan leaf is adjusted, mounting plate 18 is fixedly connected with the outside of fan shaft 1, fixed plate 5 is fixedly connected with the outside of mounting plate 18, first connecting plate 4 is rotatably connected with the outside of the end of fan shaft 1 away from first fan leaf 2, first connecting ring 10 is fixedly connected with the side of first connecting plate 4 away from mounting plate 18, first connecting ring 10 rotates with first connecting plate 4, a plurality of fixed holes 11 are arranged on the side of first connecting ring 10 away from first connecting plate 4, first connecting ring 10 rotates with fixed hole 11, second connecting ring 13 is slidably connected with the outside of the end of fan shaft 1 away from first connecting ring 10, fixed rod 12 is fixedly connected with the side of second connecting ring 13 symmetrically, second connecting ring 13 moves with fixed rod 12 into fixed hole 11, and the position of first connecting ring 10 is fixed.
[0023] Further, the side of fixed plate 5 is provided with sliding groove 6 penetrating its surface, connecting column 7 is slidably connected in the inside of sliding groove 6, connecting column 7 moves along the inside of sliding groove 6, one end of connecting column 7 is fixedly connected with second fan leaf 3, and connecting column 7 moves with second fan leaf 3.
[0024] Further, the end of connecting column 7 away from second fan leaf 3 is fixedly connected with moving plate 8, and moving plate 8 moves with connecting column 7.
[0025] Further, the outside of first connecting plate 4 is rotatably connected with adjusting rod 9, first connecting plate 4 rotates with adjusting rod 9, and the end of adjusting rod 9 away from first connecting plate 4 is rotatably connected with moving plate 8, and adjusting rod 9 moves with moving plate 8.
[0026] Further, the inside of fan shaft 1 is fixedly connected with sliding rod 15 symmetrically, and clamping block 14 is slidably connected with the outside of sliding rod 15, and clamping block 14 moves along the outside of sliding rod 15.
[0027] Further, the spring 16 is fixedly connected between one side of the clamping block 14 and the fan shaft 1, the clamping block 14 moves to extrude the spring 16, the spring 16 generates elastic force under extrusion, and the spring 16 restores to the original position with the clamping block 14 under the action of the elastic force, the moving range of the second connecting ring 13 is limited, and the fixing rod 12 is fixed in the fixing hole 11.
[0028] Further, the second connecting plate 17 is fixedly connected to one end of the clamping block 14, and the second connecting plate 17 moves to move the clamping block 14.
[0029] In use, the first connecting ring 10 is rotated, the first connecting ring 10 rotates with the first connecting plate 4, the first connecting plate 4 rotates with the adjusting rod 9 on the outside to rotate, the adjusting rod 9 moves with the connecting column 7 in the sliding groove 6 through the moving plate 8, the connecting column 7 moves with the second fan blade 3 along the outside of the first fan blade 2 to adjust the length of the fan blade, after adjustment, the second connecting ring 13 is moved, the second connecting ring 13 enters the fixing hole 11 with the fixing rod 12, the clamping block 14 is extruded in the moving process of the second connecting ring 13, the first connecting plate 4 is extruded to move along the sliding rod 15 to the direction of the spring 16, the spring 16 generates elastic force under extrusion, and the spring 16 restores to the original position with the clamping block 14 under the action of the elastic force, the position of the second connecting ring 13 is fixed, the fixing rod 12 is limited in the fixing hole 11, and the first connecting ring 10 is prevented from rotating in use, so that the length of the fan blade is fixed.
[0030] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.
[0031] It should be noted that, in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation. The statement "including a limited element" does not exclude the existence of other identical elements in the process, method, article or equipment including the element.
[0032] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A blade for a negative pressure fan comprising a fan shaft (1), characterized in that: The outer side of the fan shaft (1) is fixedly connected with a first fan blade (2), the outer side of the first fan blade (2) is slidably connected with a second fan blade (3), the outer side of the fan shaft (1) is fixedly connected with a mounting plate (18), the outer side of the mounting plate (18) is fixedly connected with a fixed plate (5), the outer side of the fan shaft (1) away from the first fan blade (2) is rotatably connected with a first connecting plate (4), the side of the first connecting plate (4) away from the mounting plate (18) is fixedly connected with a first connecting ring (10), a plurality of fixed holes (11) are formed in the side of the first connecting ring (10) away from the first connecting plate (4), the outer side of the end of the fan shaft (1) away from the first connecting ring (10) is slidably connected with a second connecting ring (13), and the side of the second connecting ring (13) is fixedly connected with a fixed rod (12) in pairs.
2. A blade for a negative pressure fan according to claim 1, characterized in that: The side of the fixed plate (5) is provided with a sliding groove (6) penetrating through the surface thereof, and the inside of the sliding groove (6) is slidably connected with a connecting column (7), and one end of the connecting column (7) is fixedly connected with the second fan blade (3).
3. A blade for a negative pressure fan according to claim 2, characterized in that: The end of the connecting column (7) away from the second fan blade (3) is fixedly connected with a moving plate (8).
4. A blade for a negative pressure fan according to claim 3, characterized in that: The outer side of the first connecting plate (4) is rotatably connected with an adjusting rod (9), and the end of the adjusting rod (9) away from the first connecting plate (4) is rotatably connected with the moving plate (8).
5. The blade for a negative pressure fan according to claim 1, characterized by: The inside of the fan shaft (1) is fixedly connected with a sliding rod (15) in pairs, and the outer side of the sliding rod (15) is slidably connected with a clamping block (14).
6. A blade for a negative pressure fan according to claim 5, characterized in that: The side of the clamping block (14) and the fan shaft (1) are fixedly connected with a spring (16).
7. A blade for a negative pressure fan according to claim 5, characterized in that: The end of the clamping block (14) is fixedly connected with a second connecting plate (17).