Electrostatic spinning nozzle height adjusting mechanism

Abstract

The utility model discloses a kind of electrostatic spinning nozzle height adjusting mechanism, including base, vertical welding in the rear end surface of base column, through the vertical sliding of slide rail and be provided with the nozzle support of nozzle, driving gear, fixed rack, driving shaft and adjusting handle;The fixed rack is arranged in parallel along the column front surface center line, and is rigidly connected with column;The driving gear is coaxially fixed in the middle part of driving shaft, and the both ends of driving shaft are installed in the bearing seat of nozzle support through the angular contact ball bearing of left-right symmetry arrangement;The adjusting handle is fixedly connected in the right side outer extension end of driving shaft through spline coupling, the utility model realizes precision lifting and reliable self-locking by gear rack precision transmission system and locking structure, applicable to high-precision electrostatic spinning production environment, significantly improve the consistency and equipment stability of fiber manufacturing.

Description

Technical Field

[0001] This utility model belongs to the field of electrostatic spinning equipment, specifically, it relates to an electrostatic spinning nozzle height adjustment mechanism. Background Technology

[0002] Electrospinning is a specialized fiber manufacturing process in which a polymer solution or melt is jetted and spun in a strong electric field. Under the influence of the electric field, the droplet at the needle changes from a spherical shape to a conical shape (i.e., a "Taylor cone"), and extends from the tip of the cone to form a fine fiber filament. This method can produce polymer filaments with nanometer-scale diameters. Electrospinning has become a widely applicable technology in the biopharmaceutical and medical device industries due to its advantages such as simple manufacturing equipment, low spinning cost, wide variety of spinnable materials, and controllable process.

[0003] In electrospinning technology, the height of the nozzle and the receiving device directly affects the electric field distribution and fiber deposition effect. Traditional adjustment mechanisms mostly use threaded lifting or hydraulic drive. However, threaded drives are prone to backlash, making fine adjustment difficult. Hydraulic systems are susceptible to temperature fluctuations and are prone to leakage after long-term use. Furthermore, the self-locking function requires manual tightening, resulting in low adjustment efficiency, insufficient precision, poor stability, and cumbersome operation. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, the purpose of this utility model is to provide an electrostatic spinning nozzle height adjustment mechanism, comprising a base, a column vertically welded to the rear end face of the base, a nozzle bracket that can slide vertically along the column via a slide rail and is equipped with a nozzle, a drive gear, a fixed rack, a drive shaft, an adjustment handle, and a locking structure.

[0005] The fixed rack is arranged parallel to the center line of the front surface of the column and is rigidly connected to the column.

[0006] The drive gear is coaxially fixed to the middle of the drive shaft, and the two ends of the drive shaft are installed in the bearing seats of the nozzle bracket through symmetrically arranged angular contact ball bearings.

[0007] The adjusting handle is fixedly connected to the right extension end of the drive shaft via a spline coupling;

[0008] The locking structure is used to lock the drive shaft to prevent the nozzle bracket from moving during operation.

[0009] As a preferred embodiment, the drive gear is provided with symmetrically arranged trapezoidal cross-section reinforcing ribs on both sides; a harmonic reducer is coaxially integrated at the left end of the drive shaft, and the rigid wheel of the harmonic reducer is bolted to the left side wall of the nozzle bracket through a flange.

[0010] As a preferred embodiment, the back of the fixed rack is provided with double rows of conical positioning holes; the front surface of the column is provided with matching conical positioning pins.

[0011] As a preferred embodiment, the locking structure includes:

[0012] A brake disc coaxially fixed to the left end of the drive shaft;

[0013] A swingable brake block is mounted on the inner wall of the nozzle bracket via a pin.

[0014] The cable has one end located at one end of the brake block, and the other end passes through a guide hole provided on the nozzle bracket and fitted with a bushing, and is connected to a locking handle.

[0015] As a preferred embodiment, the locking handle includes a fixed rod fixed between the two crossbars, and a handle is rotatably connected to the fixed rod via a torsion spring.

[0016] As a preferred embodiment, a rubber friction block is fixedly connected to the side of the brake block closest to the brake disc.

[0017] As a preferred embodiment, the outer circumference of the grip is provided with an anti-slip sleeve.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention achieves precise lifting and reliable self-locking through a gear and rack precision transmission system and a locking structure, making it suitable for high-precision electrospinning production environments and significantly improving the consistency of fiber manufacturing and equipment stability. Attached Figure Description

[0020] Figure 1 This is a top view of the structure of this utility model;

[0021] Figure 2 This is a front view structural diagram of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments.

[0023] An electrostatic spinning nozzle height adjustment mechanism includes a base 1, a column 2 vertically welded to the rear end face of the base 1, a nozzle bracket 3 that can slide vertically along the column 2 via a slide rail and is equipped with a nozzle, a drive gear 4, a fixed rack 5, a drive shaft 6, an adjustment handle 7, and a locking mechanism.

[0024] The fixed rack 5 is arranged parallel to the center line of the front surface of the column 2 and is rigidly connected to the column 2.

[0025] The drive gear 4 is coaxially fixed in the middle of the drive shaft 6, and the two ends of the drive shaft 6 are installed in the bearing seats 8 of the nozzle bracket 3 through symmetrically arranged angular contact ball bearings.

[0026] The adjusting handle 7 is fixedly connected to the right extended end of the drive shaft 6 via a spline coupling 23. Preferably, the length of the extended end is 1.2-1.5 times the diameter of the drive shaft.

[0027] The column 2 serves as the main vertical support and is connected to the fixed rack 5;

[0028] The nozzle bracket 3 is mounted on the drive shaft 6 via the bearing seat 8, and the drive gear 4 meshes with the fixed rack 5;

[0029] Adjusting handle 7 is connected to drive shaft 6 via spline coupling 23 to transmit torque;

[0030] The spline coupling 23 can eliminate axial deviation and ensure the meshing accuracy of the drive gear 4 and the fixed rack 5, while the angular contact ball bearing can bear load in both directions and adapt to the combined load during the lifting process.

[0031] The locking mechanism is used to lock the drive shaft 6 to prevent the nozzle bracket 3 from moving during operation.

[0032] In a preferred embodiment, the drive gear 4 is provided with symmetrically arranged trapezoidal cross-section reinforcing ribs 24 on both sides. Preferably, the outer diameter of the reinforcing ribs 24 is 1.05 times the pitch circle diameter of the drive gear 4, the rib height is 1 / 4 to 1 / 3 of the tooth width, and the rib spacing is twice the tooth pitch.

[0033] The left end of the drive shaft 6 is coaxially integrated with a harmonic reducer 25, and the rigid wheel of the harmonic reducer 25 is bolted to the left side wall of the nozzle bracket 3 through the flange 26.

[0034] The trapezoidal cross-section reinforcing rib 24 can increase the bending stiffness of the drive gear 4 and prevent deformation under heavy load;

[0035] The harmonic reducer 25 amplifies the operating force of the adjusting handle 7 to ≥200 N·m, enabling more precise height adjustment;

[0036] During operation, the operator rotates the adjustment handle 7 to reduce the speed and increase the torque of the harmonic reducer 25, which in turn causes the drive gear 4 to rotate and drive the nozzle bracket 3 to rise and fall along the fixed rack 5 to adjust the height.

[0037] In a preferred embodiment, the back of the fixed rack 5 is provided with double-row conical positioning holes 27; the front surface of the column 2 is provided with matching conical positioning pins 28. Preferably, the positioning pins 28 and the positioning holes 27 are interference-fitted, with an interference amount of 0.02 to 0.05 mm; the parallelism tolerance between the working surface of the rack and the axis of the column is ≤0.03 mm.

[0038] The double-row tapered positioning holes 27 can effectively disperse shear stress and prevent the fixed rack 5 from being displaced by impact.

[0039] As a preferred embodiment, the locking structure includes:

[0040] The brake disc 29, which is coaxially fixed to the left end of the drive shaft 6, should have its end face hardened by quenching (HRC≥50).

[0041] A swingable brake block 31 is mounted on the inner wall of the nozzle bracket 3 via a pin.

[0042] The cable 33 has one end located at one end of the brake block 31, and the other end passes through a guide hole opened on the nozzle bracket 3 and fitted with a bushing, and is connected to a locking handle 34.

[0043] After the nozzle bracket 3 is adjusted to the specified height, tighten the locking handle 34 to move the cable 33 outward. The brake block 31 will deflect as the cable 33 moves, and the lower end of the brake block 31 will move towards the brake disc 29 until it presses against the brake disc 29 and prevents it from rotating. This prevents the drive shaft 6 from rotating, thus locking the nozzle bracket 3 in conjunction with the harmonic reducer 25. When the height of the nozzle bracket 3 needs to be adjusted, simply loosen the locking handle 34. Under the action of the torsion spring, the locking handle 34 will drive the cable 3 and the brake block 31 to reset. Preferably, when the locking handle 34 is not tightened, the brake block 31 is in a vertical position with a gap of 1 mm from the brake disc.

[0044] In a preferred embodiment, the locking handle 34 includes a fixed rod 341 fixed between the two crossbars, and a handle 342 is rotatably connected to the fixed rod 341 via a torsion spring.

[0045] In a preferred embodiment, a rubber friction block 32 is fixedly connected to the side of the brake block 31 near the brake disc 29, which can effectively increase the friction between the brake block 31 and the brake disc 29 and improve the braking effect.

[0046] Preferably, the brake block 31 is detachable, allowing for easy replacement of both the brake block 31 and the rubber friction block 32.

[0047] The overall workflow of this device is as follows:

[0048] 1. Initial preparation state:

[0049] The grip 342 of the locking handle 34 is kept in a 90° extended state under the action of the torsion spring;

[0050] A 1mm gap is maintained between the brake block 31 and the brake disc 29, allowing the drive shaft to rotate freely.

[0051] The nozzle bracket 3 achieves passive self-locking through the harmonic reducer 25.

[0052] 2. Height adjustment lock:

[0053] Grip the locking handle firmly: Press the handle 342 with your right hand until closed → pull the cable 33 to tension;

[0054] Traction brake block: Cable 33 traction brake block 31 force-bearing end → brake block 31 rotates counterclockwise around the pin shaft

[0055] Pressing the brake disc: Rubber friction block 32 presses the brake disc 29 → generates a braking torque of ≥5 N·m and actively locks the drive shaft 6.

[0056] 3. Perform height adjustment:

[0057] Rotate the adjustment handle: Turn the handle 7 with your left hand → drive the shaft 6 through the spline coupling 23;

[0058] Speed ​​reduction and torque increase transmission: Harmonic reducer 25 reduces speed → drive gear 4 increases output torque by 80 times;

[0059] Precise movement of the support: the drive gear 4 rolls along the fixed rack 5 → the nozzle support 3 rises and falls vertically along the column 2;

[0060] Precision control: For every one revolution of the handle, the bracket moves by 10mm ± 0.1mm.

[0061] 4. Release lock and reset:

[0062] Loosen the locking handle: Release grip 342 → the torsion spring automatically returns to the 90° unfolded position;

[0063] Release the brake pressure: Cable 33 loosens → Brake block 31 springs back to its original position;

[0064] Restoring safe clearance: Friction block 32 separates from brake disc 29 → Rebuild 1mm clearance.

[0065] The contents not described in detail in this specification are existing technologies known to those skilled in the art, and their specifications and models can be selected according to actual conditions.

[0066] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A height adjustment mechanism for an electrostatic spinning nozzle, characterized in that, Includes a base (1), a column (2) vertically welded to the rear end face of the base (1), a nozzle bracket (3) that can slide vertically along the column (2) via a slide rail and is equipped with a nozzle, a drive gear (4), a fixed rack (5), a drive shaft (6), an adjustment handle (7), and a locking structure; The fixed rack (5) is arranged parallel to the center line of the front surface of the column (2) and is rigidly connected to the column (2); The drive gear (4) is coaxially fixed in the middle of the drive shaft (6), and the two ends of the drive shaft (6) are installed in the bearing seats (8) of the nozzle bracket (3) through symmetrically arranged angular contact ball bearings; The adjusting handle (7) is fixedly connected to the right extension end of the drive shaft (6) via a spline coupling (23); The locking structure is used to lock the drive shaft (6) to prevent the nozzle bracket (3) from moving in the working state.

2. The electrostatic spinning nozzle height adjustment mechanism according to claim 1, characterized in that, The drive gear (4) has symmetrical trapezoidal cross-section reinforcing ribs (24) on both sides; the drive shaft (6) has a harmonic reducer (25) coaxially integrated on the left end, and the rigid wheel of the harmonic reducer (25) is bolted to the left side wall of the nozzle bracket (3) through the flange (26).

3. The electrostatic spinning nozzle height adjustment mechanism according to claim 1, characterized in that, The fixed rack (5) has double-row conical positioning holes (27) on its back; the column (2) has matching conical positioning pins (28) on its front surface.

4. The electrostatic spinning nozzle height adjustment mechanism according to claim 1, characterized in that, The locking structure includes: Brake disc (29) is coaxially fixed to the left end of drive shaft (6); A swingable brake block (31) is mounted on the inner wall of the nozzle bracket (3) via a pin. The cable (33) has one end located at one end of the brake block (31), and the other end passes through a guide hole opened on the nozzle bracket (3) and fitted with a bushing and is connected to a locking handle (34). The locking handle (34) includes a fixed rod (341) fixed between two crossbars, and a handle (342) is rotatably connected to the fixed rod (341) by a torsion spring.

5. The electrostatic spinning nozzle height adjustment mechanism according to claim 4, characterized in that, A rubber friction block (32) is fixedly connected to the side of the brake block (31) near the brake disc (29).

6. The electrostatic spinning nozzle height adjustment mechanism according to claim 4, characterized in that, The grip (342) is provided with an anti-slip sleeve around its outer perimeter.

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