Paddle integral forming die

Abstract

The utility model relates to the technical field of aircrafts, in particular to a paddle integral forming die which comprises a lower die, a middle die and an upper die. A propeller hub positioning hole is formed in the middle of the lower die; the lower mold is provided with a plurality of lower forming blocks; a receding hole is formed in the middle of the middle mold in a penetrating mode. The middle mold is provided with a plurality of upper forming blocks; the upper forming block is movably arranged in the middle mold; a blade forming cavity is formed between the bottom of the upper forming block and the top of the lower forming block; a propeller hub forming cavity is formed between the end, close to the propeller hub positioning hole, of the upper forming block and the end, close to the receding hole, of the upper forming block. And all the blade forming cavities are communicated with the propeller hub forming cavity. According to the utility model, the lower die, the middle die and the upper die are arranged, and the blade piece is formed in the blade forming cavity and the propeller hub piece is formed in the propeller hub forming cavity in the heating and pressing process of the upper die, so that the blade piece and the propeller hub piece are of an integrated structure after being formed, and the overall structure of the blade is stable and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of aircraft technology, concretely relates to a paddle integrated forming die. BACKGROUND

[0002] In modern drone design, to improve efficiency, reduce noise and enhance safety, a ducted fan is usually used as a propulsion device. The ducted fan is composed of a closed annular housing (i.e. duct) and rotating paddles inside it. The paddles include a central hub and multiple blades connected to the outer periphery of the hub, which work together to generate thrust or lift.

[0003] Due to the high cost of paddles, the current market unmanned aerial vehicle paddles adopt a detachable connection between the hub and the blades. This design allows individual replacement of damaged blades, thereby reducing maintenance costs and improving resource utilization.

[0004] However, the detachable structure may cause small gaps or looseness between the hub and the blades, which may affect the aerodynamic characteristics and lead to efficiency decline. More seriously, in the case of high-speed rotation, any loose connection may cause mechanical failure, thereby threatening the safety and reliability of the unmanned aerial vehicle.

[0005] Therefore, there is a need to provide a die that can integrally form paddles. UTILITY MODEL CONTENTS

[0006] The utility model aims at the above-mentioned deficiencies in the prior art and provides a paddle integrated forming die.

[0007] The utility model aims at the above-mentioned deficiencies in the prior art and provides a paddle integrated forming die.

[0008] The middle part of the lower die is provided with a hub positioning hole; the top of the lower die is provided with a plurality of lower forming blocks distributed with the hub positioning hole as the center;

[0009] The middle part of the middle die is provided with a gap hole; the bottom of the middle die is provided with a plurality of upper forming blocks distributed with the gap hole as the center; the upper forming blocks are movably arranged in the middle die along the diameter direction with the gap hole as the center; each upper forming block is arranged between two adjacent lower forming blocks;

[0010] The bottom of the upper forming block and the top of the lower forming block form a blade forming cavity; the end of all upper forming blocks close to the hub positioning hole and the end of all upper forming blocks close to the gap hole form a hub forming cavity; all blade forming cavities are in communication with the hub forming cavity.

[0011] The utility model further sets up, the middle part of upper mould is equipped with the forming top block, the forming top block is equipped with the hub forming cavity and the hole of giving place in the paddle.

[0012] The utility model further sets up, one end of upper forming block is equipped with the inclined plane away from the paddle hub positioning hole, the bottom of upper mould is equipped with the accommodation groove that is used for containing middle mould, the bottom of accommodation groove is equipped with the abutting inclined groove that cooperates with the inclined plane.

[0013] The utility model further sets up, the top of lower forming block is equipped with the guide rod, the bottom of middle mould is equipped with the guide groove that cooperates with the guide rod.

[0014] The utility model further sets up, the guide rod is equipped with the first spring, and the guide groove is equipped with the abutting plane that cooperates with the first spring.

[0015] The utility model further sets up, middle mould is equipped with the strip sliding slot and the strip connecting groove, the strip sliding slot is linked with the strip connecting groove, the strip sliding slot is equipped with the sliding block, the top of upper forming block is equipped with the connecting block, the connecting block passes through the strip connecting groove and is detachably connected with the sliding block.

[0016] The utility model further sets up, middle mould is equipped with the reset lever, and the second spring is equipped between one end of upper forming block away from the paddle hub positioning hole and the reset lever.

[0017] The utility model further sets up, and the bottom of upper forming block and the bottom of lower forming block form the blade overflow groove that is communicated with the blade forming cavity.

[0018] The utility model further sets up, and the outer wall of forming top block is equipped with the limit strip.

[0019] The utility model further sets up, and the inner wall of paddle hub positioning hole is equipped with the hub overflow groove that is communicated with the hub forming cavity.

[0020] The utility model has the advantages that the utility model sets up lower mould, middle mould and upper mould, in the process of heating and pressing of upper mould, the blade piece is formed in the blade forming cavity, and the hub piece is formed in the hub forming cavity, so that the blade piece and the hub piece are formed as an integral structure after forming, and the overall structure of the blade is stable and reliable. ACCURACY

[0021] The utility model is further explained by the drawings, but the embodiment in the drawings does not constitute any limitation to the utility model, and other drawings can be obtained according to the following drawings without the creative labor of the ordinary skill in the art.

[0022] Figure 1This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] Figure 3 This is an exploded view of the structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the lower mold of this utility model;

[0026] Figure 5 This is a schematic diagram of the mold structure in this utility model;

[0027] Figure 6 This is a structural schematic diagram of the mold from another perspective in this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the lower mold and the upper forming block of this utility model.

[0029] Figure 8 This is a schematic diagram of the structure of the lower mold and the middle mold of this utility model.

[0030] Figure 9 This is a schematic diagram of the upper mold of this utility model;

[0031] Figure 10 This is a schematic diagram of the structure of the blade of this utility model;

[0032] The components are as follows: 1. Lower mold; 11. Hub positioning hole; 12. Lower forming block; 2. Middle mold; 21. Relief hole; 22. Upper forming block; 23. Inclined surface; 3. Upper mold; 31. Forming top block; 32. Limiting strip; 33. Receiving groove; 34. Abutting inclined groove; 41. Blade forming cavity; 42. Hub forming cavity; 51. Guide rod; 52. Guide groove; 53. First spring; 54. Abutting plane; 61. Strip sliding groove; 62. Strip connecting groove; 63. Sliding block; 64. Connecting block; 7. Reset rod; 71. Second spring; 81. Blade overflow groove; 82. Hub overflow groove; 91. Hub component; 92. Blade component. Detailed Implementation

[0033] The present invention will be further described in conjunction with the following embodiments.

[0034] Depend on Figures 1 to 10 As can be seen, the blade integral molding mold described in this embodiment includes a lower mold 1, a middle mold 2 and an upper mold 3;

[0035] The lower mold 1 has a hub positioning hole 11 in the middle; multiple lower forming blocks 12 are arranged on the top of the lower mold 1 with the hub positioning hole 11 as the center; a clearance hole 21 is provided through the middle of the middle mold 2; multiple upper forming blocks 22 are arranged on the bottom of the middle mold 2 with the clearance hole 21 as the center; the upper forming blocks 22 are movably arranged in the middle mold 2 along the diameter direction with the clearance hole 21 as the center; each upper forming block 22 is respectively arranged between two adjacent lower forming blocks 12; a blade forming cavity 41 is formed between the bottom of the upper forming block 22 and the top of the lower forming block 12; a hub forming cavity 42 is formed between the ends of all upper forming blocks 22 near the hub positioning hole 11 and the ends of all upper forming blocks 22 near the clearance hole 21; all blade forming cavities 41 are connected to the hub forming cavity 42. In this embodiment, an integrated blade forming mold is provided in the middle of the upper mold 3, and the forming top block 31 passes through the blade hub forming cavity 42 and the clearance hole 21.

[0036] Specifically, in this embodiment, the integrated blade molding mold involves placing carbon fiber cloth on the top surface of the lower molding block 12 and the bottom surface of the upper molding block 22, respectively. Then, the middle mold 2 is pressed onto the lower mold 1, such that the upper molding block 22 is positioned between two adjacent lower molding blocks 12. A blade forming cavity 41 is formed between the bottom of the upper molding block 22 and the top of the lower molding block 12. A blade hub forming cavity is formed between the ends of all upper molding blocks 22 near the hub positioning hole 11 and the ends of all upper molding blocks 22 near the clearance hole 21. In cavity 42, carbon fiber cloth is placed inside blade forming cavity 41, and part of the carbon fiber cloth in blade forming cavity 41 overflows into hub forming cavity 42; then another ring of carbon fiber cloth is placed on the inner wall of hub forming cavity 42, and finally the upper mold 3 is pressed onto the middle mold 2. During the heating and pressing process of upper mold 3, blade component 92 is formed in blade forming cavity 41, and hub component 91 is formed in hub forming cavity 42, so that blade component 92 and hub component 91 are formed into an integral structure, making the overall structure of the blade stable and reliable.

[0037] In this embodiment, an integrated blade molding mold is provided with an inclined surface 23 at one end of the upper molding block 22 away from the hub positioning hole 11; the bottom of the upper mold 3 is provided with a receiving groove 33 for accommodating the middle mold 2; and the bottom of the receiving groove 33 is provided with an abutting groove 34 that cooperates with the inclined surface 23.

[0038] Specifically, during the downward pressing process of the upper mold 3, the upper forming block 22 gradually moves towards the direction of the hub positioning hole 11 under the cooperation of the inclined groove 34 and the inclined surface 23, so that the carbon fiber cloth in the blade forming cavity 41 is formed into a blade part 92.

[0039] The paddle integrated forming die provided in the embodiment has a guide rod 51 arranged on the top of the lower forming block 12; and the bottom of the middle die 2 is provided with a guide groove 52 matched with the guide rod 51. Through the above arrangement, the middle die 2 can stably ascend and descend in the lower die 1.

[0040] The paddle integrated forming die provided in the embodiment has a first spring 53 sleeved on the guide rod 51; and the guide groove 52 is provided with an abutting plane 54 abutting against the first spring 53. Through the above arrangement, the first spring 53 can be reset when the die is opened, so as to facilitate the separation of the middle die 2 and the lower die 1, thereby facilitating the discharging of the finished product.

[0041] The paddle integrated forming die provided in the embodiment has a strip-shaped sliding groove 61 and a strip-shaped connecting groove 62 arranged on the middle die 2; the strip-shaped sliding groove 61 is communicated with the strip-shaped connecting groove 62; the strip-shaped sliding groove 61 is slidably provided with a sliding block 63; the top of the upper forming block 22 is provided with a connecting block 64; and the connecting block 64 is detachably connected with the sliding block 63 after penetrating through the strip-shaped connecting groove 62.

[0042] Specifically, the paddle integrated forming die provided in the embodiment has the above arrangement, so that the upper forming block 22 can stably move in the middle die 2; and the connecting block 64 is detachably connected with the sliding block 63, thereby facilitating the disassembly of the upper forming block 22 and the middle die 2.

[0043] The paddle integrated forming die provided in the embodiment has a reset rod 7 arranged on the middle die 2; and a second spring 71 is arranged between the end of the upper forming block 22 away from the paddle hub positioning hole 11 and the reset rod 7.

[0044] Specifically, in the process of pressing the upper die 3 downward, the upper forming block 22 gradually moves to the direction of the paddle hub positioning hole 11 under the cooperation of the abutting chute 34 and the inclined surface 23, and the second spring 71 is compressed at this time; and in the process of opening the die, the upper forming block 22 moves to the direction away from the paddle hub positioning hole 11 under the action of the second spring 71, so as to facilitate the separation of the upper forming block 22 and the lower forming block 12, thereby facilitating the discharging of the finished product.

[0045] The paddle integrated forming die provided in the embodiment has a blade overflow groove 81 formed between the bottom of the upper forming block 22 and the bottom of the lower forming block 12 and communicated with the blade forming cavity 41. Through the above arrangement, the excess carbon fiber cloth in the blade forming cavity 41 can be overflowed.

[0046] The paddle integrated forming die provided in the embodiment has a limiting strip 32 arranged on the outer wall of the forming top block 31. Through the above arrangement, the corresponding limiting strip 32 is formed on the inner wall of the paddle hub piece 91.

[0047] The inner wall of the blade hub positioning hole 11 is provided with a blade hub overflow groove 82 in communication with the blade hub forming cavity 42.

[0048] Finally, it should be noted that the above examples are used to illustrate the technical solutions of the present application, and are not intended to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A propeller blade integrated molding mold, characterized in that: It includes a lower mold (1), a middle mold (2), and an upper mold (3); The lower mold (1) is provided with a hub positioning hole (11) in the middle; a plurality of lower forming blocks (12) are distributed on the top of the lower mold (1) with the hub positioning hole (11) as the center. The middle mold (2) has a through hole (21) in the middle; the bottom of the middle mold (2) is provided with a plurality of upper forming blocks (22) arranged around the center of the through hole (21); the upper forming blocks (22) are movably arranged in the middle mold (2) along the diameter direction around the through hole (21); each upper forming block (22) is respectively arranged between two adjacent lower forming blocks (12); A blade forming cavity (41) is formed between the bottom of the upper forming block (22) and the top of the lower forming block (12); a rotor forming cavity (42) is formed between the ends of all upper forming blocks (22) near the rotor hub positioning hole (11) and the ends of all upper forming blocks (22) near the relief hole (21); all blade forming cavities (41) are connected to the rotor hub forming cavity (42).

2. The blade integral forming mold according to claim 1, characterized in that: The upper mold (3) is provided with a forming top block (31) in the middle; the forming top block (31) passes through the paddle hub forming cavity (42) and the clearance hole (21).

3. The blade integral forming mold according to claim 2, characterized in that: The upper forming block (22) has an inclined surface (23) at one end away from the hub positioning hole (11); the bottom of the upper mold (3) has a receiving groove (33) for accommodating the middle mold (2); the bottom of the receiving groove (33) has an abutting groove (34) that cooperates with the inclined surface (23).

4. The blade integral forming mold according to claim 1, characterized in that: The top of the lower molding block (12) is provided with a guide rod (51); the bottom of the middle mold (2) is provided with a guide groove (52) that cooperates with the guide rod (51).

5. The blade integral forming mold according to claim 4, characterized in that: The guide rod (51) is fitted with a first spring (53); the guide groove (52) is provided with an abutting surface (54) that abuts against the first spring (53).

6. The blade integral forming mold according to claim 1, characterized in that: The middle mold (2) is provided with a strip sliding groove (61) and a strip connecting groove (62); the strip sliding groove (61) and the strip connecting groove (62) are connected; a sliding block (63) is slidably provided in the strip sliding groove (61); a connecting block (64) is provided on the top of the upper forming block (22); the connecting block (64) passes through the strip connecting groove (62) and is detachably connected to the sliding block (63).

7. The blade integral forming mold according to claim 1, characterized in that: The middle mold (2) is provided with a reset rod (7); a second spring (71) is provided between the end of the upper forming block (22) away from the propeller hub positioning hole (11) and the reset rod (7).

8. The blade integral forming mold according to claim 1, characterized in that: A blade overflow groove (81) communicating with the blade forming cavity (41) is formed between the bottom of the upper forming block (22) and the bottom of the lower forming block (12).

9. The blade integral forming mold according to claim 2, characterized in that: The outer wall of the molded top block (31) is provided with a limiting strip (32).

10. A propeller blade integral forming mold according to claim 9, characterized in that: The inner wall of the hub positioning hole (11) is provided with a hub overflow groove (82) that communicates with the hub forming cavity (42).

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