Large-tonnage double-brake electric capstan

Abstract

The utility model discloses a large-tonnage double-brake electric capstan which comprises a main body support, a driving motor is installed at one end of the main body support, a speed reducer assembly is installed at the other end of the main body support, and a roller is arranged between the speed reducer assembly and the driving motor. A first brake assembly for connecting the speed reducer assembly and the driving motor is arranged between the speed reducer assembly and the driving motor and comprises a brake shaft, one end of the brake shaft is connected with the driving motor, and the other end of the brake shaft is connected with the speed reducer assembly; the speed reducer assembly comprises a speed reducer shell, a multi-stage planetary speed reduction assembly and a second brake assembly are arranged in the speed reducer shell, the multi-stage planetary speed reduction assembly comprises a first-stage transmission shaft connected with the brake shaft, the second brake assembly comprises a plurality of evenly-distributed first-stage planetary gears, and the first-stage planetary gears are connected with the first-stage transmission shaft in a meshed mode. Dual braking is carried out through the first braking assembly and the second braking assembly, the braking effect is good, and the structure is simple and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of electric winch technology, specifically relating to a large-tonnage double-brake electric winch. Background Technology

[0002] A winch is a common traction tool used frequently in daily life. A typical winch usually includes a drive motor and a braking assembly for braking. Existing patent CN210313259U discloses a reliable winch comprising a motor, drive shaft, reduction mechanism, drum, wire rope, support frame, overload limiter, controller, and counter. The motor output shaft and reduction mechanism are connected via the drive shaft, and the reduction mechanism is connected to the drum to drive the wire rope to wind onto the drum. The overload limiter includes a first coupling, a second coupling, a first friction plate, a second friction plate, and an adjusting component. Existing winches simply use friction plates for braking, resulting in poor braking effect and insufficient safety and reliability, making them unsuitable for high-tonnage electric winches. Therefore, a high-tonnage dual-brake electric winch needs to be designed to overcome these difficulties. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by designing a large-tonnage dual-brake electric winch. This invention achieves dual braking through a first brake assembly and a second brake assembly, resulting in good braking effect and a simple and reliable structure.

[0004] The objective of this invention is achieved through the following technical solution: a large-tonnage double-brake electric winch, comprising a main support frame, a drive motor mounted at one end of the main support frame, and a reducer assembly mounted at the other end of the main support frame, with a drum provided between the reducer assembly and the drive motor; a first brake assembly connecting the reducer assembly and the drive motor is provided between the reducer assembly and the drive motor, the first brake assembly comprising a brake shaft, one end of the brake shaft connected to the drive motor, and the other end of the brake shaft connected to the reducer assembly; the reducer assembly comprising a reducer housing, within which a multi-stage planetary reducer assembly and a second brake assembly are provided, the multi-stage planetary reducer assembly comprising a primary transmission shaft connected to the brake shaft, and the second brake assembly comprising a plurality of evenly distributed primary planetary gears, the primary planetary gears being meshed with the primary transmission shaft.

[0005] Preferably, an internal spline coupling is provided between the drive motor and the first brake assembly to connect the two. The first brake assembly further includes a first brake disc, a second brake disc, brake pads, a cam slider, a brake pad, and a pair of disc springs. The first brake disc, the second brake disc, the brake pads, the cam slider, the brake pad, and the disc springs are all sleeved on the brake shaft. The disc spring is disposed between the second brake disc and the brake pad, the brake pad is disposed between the first brake disc and the second brake disc, and the cam slider is fitted to the first brake disc.

[0006] Preferably, the internal spline coupling is sleeved and installed on the outer layer of the cam slider and the first brake disc; the first brake disc is provided with a guide annular step, and the bottom of the cam slider is fitted onto the guide annular step; the outer contour of the cam slider and the outer contour of the guide annular step are adapted to each other.

[0007] Preferably, the brake shaft has a first step, and the brake pad is installed on the first step; the brake pad is disc-shaped, and there is a gap between the brake pad and the outer wall of the brake shaft; the outer wall of the brake pad and the inner wall of the roller are fitted together.

[0008] In the default state, the disc spring does not undergo elastic deformation, and the first brake assembly is not in a braking state. The drive motor drives the brake shaft to rotate through the internal spline coupling, and the rotation of the brake shaft drives the first-stage transmission shaft to rotate. When the first-stage transmission shaft rotates, the second brake assembly and the multi-stage planetary reduction assembly work synchronously, and the planetary gears on the multi-stage planetary reduction assembly drive the drum to rotate relative to the main support. When the electric winch needs to brake, the drum stops rotating relative to the main support. At this time, the drive motor immediately stops rotating, so the brake shaft stops rotating. Due to inertia, the drum will have a tendency to rotate, and the drum will rotate in the opposite direction relative to the brake shaft. Then the cam slider will move axially relative to the first brake disc, so that the second brake disc squeezes the disc spring. When the disc spring elastically deforms, the first and second brake discs squeeze and contact the brake pads, thereby locking the brake shaft and preventing the brake shaft from driving the multi-stage planetary reduction assembly to work, so the drum cannot rotate. The outer wall of the brake pads also generates friction on the drum, so the drum is stationary relative to the main support, preventing the electric winch from rotating during traction.

[0009] Preferably, the end of the brake shaft near the reducer assembly is mounted inside the drum via a bearing; the brake shaft rotates synchronously with the primary drive shaft; the second brake assembly further includes an annular mounting seat, a secondary sun gear, a brake nut, a ratchet, and a pawl; the primary planetary gears are mounted on the brake nut, and each primary planetary gear is rotatably connected to the brake nut; the secondary sun gear is disposed on the outer layer of the primary drive shaft, and the brake nut is threadedly connected to the secondary sun gear, with the primary drive shaft meshing with the primary planetary gears; a ratchet is provided between the brake nut and the secondary sun gear, and the ratchet rotates synchronously with the secondary sun gear; the secondary sun gear meshes with and rotates with the planetary gears on the multi-stage planetary reduction assembly.

[0010] Preferably, a cover plate is fixedly installed at the open end of the annular mounting base, and a plurality of positioning pins are fixedly installed between the cover plate and the annular mounting base. A pawl and a torsion spring are installed on the positioning pins, and the pawl meshes with a ratchet. One pin of the torsion spring is installed on the pawl, and the other pin of the torsion spring abuts against the inner wall of the annular mounting base.

[0011] Preferably, the secondary sun gear is axially movable relative to the annular mounting base; a locking washer is provided between the secondary sun gear and the brake nut, and the locking washer is fitted onto the secondary sun gear; a locking nut is provided between the locking washer and the open end of the secondary sun gear, and the locking nut is threadedly connected to the secondary sun gear.

[0012] Preferably, the end of the primary drive shaft is provided with a hexagonal drive unit, which is installed inside the brake shaft; the multi-stage planetary reduction assembly meshes with and rotates with the roller, which is mounted on the main support via bearings; and an oil seal is provided between the roller and the main support.

[0013] When the electric winch is in braking mode, the drive motor immediately stops rotating, and the brake shaft also stops rotating. The primary drive shaft then immediately stops rotating, while the secondary sun gear continues to rotate due to inertia. At this point, the secondary sun gear is in a reverse state relative to the primary drive shaft, causing the pawl to lock the ratchet, thus preventing the primary drive shaft from rotating further. The drum is then locked, preventing slippage or reverse rotation. In this state, the first and second brake components synchronously lock the drum, resulting in effective and reliable braking and enhanced safety.

[0014] Compared with the prior art, this utility model has the following advantages: 1. The first brake assembly restricts the rotation of the brake shaft through brake pads and compresses the disc spring through the cam slider, thereby improving the braking effect of the brake pads. 2. The second brake assembly restricts the rotation of the primary drive shaft through the cooperation of a ratchet and a pawl, so that the roller can be in braking rotation. 3. By restricting the rotation of the roller through the first and second brake assemblies, the braking effect is better and the use is safer and more reliable. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a diagram of the internal structure of the present invention;

[0017] Figure 3 A 3D view of the first brake assembly;

[0018] Figure 4 This is an exploded view of the first brake assembly;

[0019] Figure 5 This is a diagram showing the internal structure of the reducer assembly;

[0020] Figure 6 This is a diagram showing the internal structure of the second brake assembly;

[0021] Figure 7 This is an exploded view of the second brake assembly;

[0022] The diagram shows the following components: 1. Main support frame; 2. Drive motor; 3. Reducer assembly; 31. Reducer housing; 32. Multi-stage planetary reducer assembly; 321. First-stage drive shaft; 322. Hexagonal transmission unit; 4. Roller; 5. First brake assembly; 51. Brake shaft; 52. First brake disc; 53. Second brake disc; 54. Brake pad; 55. Cam slider; 56. Brake pad; 57. Disc spring; 58. Guide ring step; 59. First step; 6. Second brake assembly; 61. First-stage planetary gear; 62. Ring mounting seat; 63. Second-stage sun gear; 64. Brake nut; 65. Ratchet; 66. Pad; 67. Cover plate; 68. Positioning pin; 69. Torsion spring; 610. Locking washer; 611. Locking nut; 7. Internal spline coupling; 8. Oil seal. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0024] like Figures 1 to 7As shown, this embodiment discloses a large-tonnage dual-brake electric winch, including a main support 1, a drive motor 2 installed at one end of the main support 1, and a reducer assembly 3 installed at the other end of the main support 1. A drum 4 is provided between the reducer assembly 3 and the drive motor 2. A first brake assembly 5 is provided between the reducer assembly 3 and the drive motor 2 to connect the two. The first brake assembly 5 includes a brake shaft 51, one end of which is connected to the drive motor 2, and the other end of which is connected to the reducer assembly 3. The reducer assembly 3 includes a reducer housing 31, and a multi-stage planetary reducer assembly 32 and a second brake assembly 6 are provided inside the reducer housing 31. The multi-stage planetary reducer assembly 32 includes a first-stage transmission shaft 321 connected to the brake shaft 51. The second brake assembly 6 includes a plurality of evenly distributed first-stage planetary gears 61, which are meshed with the first-stage transmission shaft 321.

[0025] An internal spline coupling 7 connects the drive motor 2 and the first brake assembly 5. The first brake assembly 5 further includes a first brake disc 52, a second brake disc 53, brake pads 54, a cam slider 55, a brake pad 56, and a pair of disc springs 57. The first brake disc 52, the second brake disc 53, the brake pads 54, the cam slider 55, the brake pad 56, and the disc springs 57 are all sleeved on the brake shaft 51. The disc springs 57 are located between the second brake disc 53 and the brake pad 56, the brake pads 54 are located between the first brake disc 52 and the second brake disc 53, and the cam slider 55 is fitted to the first brake disc 52. The internal spline coupling 7 is sleeved on the outer layer of the cam slider 55 and the first brake disc 52. The first brake disc 52 has a guide annular step 58, and the bottom of the cam slider 55 is fitted to the guide annular step 58. The outer contour of the cam slider 55 is adapted to the outer contour of the guide annular step 58. The brake shaft 51 is provided with a first step 59, and the brake pad 56 is installed on the first step 59; the brake pad 54 is disc-shaped, and there is a gap between the brake pad 54 and the outer wall of the brake shaft 51; the outer wall of the brake pad 54 and the inner wall of the roller 4 are fitted together.

[0026] The brake shaft 51 is mounted inside the drum 4 via a bearing at the end near the reducer assembly 3; the brake shaft 51 rotates synchronously with the primary drive shaft 321; the second brake assembly 6 also includes an annular mounting seat 62, a secondary sun gear 63, a brake nut 64, a ratchet 65, and a pawl 66; the primary planetary gears 61 are mounted on the brake nut 64, and each primary planetary gear 61 is rotatably connected to the brake nut 64; the secondary sun gear 63 is disposed on the outer layer of the primary drive shaft 321, and the brake nut 64 is threadedly connected to the secondary sun gear 63, with the primary drive shaft 321 meshing with the primary planetary gears 61; a ratchet 65 is provided between the brake nut 64 and the secondary sun gear 63, and the ratchet 65 rotates synchronously with the secondary sun gear 63; the secondary sun gear 63 meshes with and rotates with the planetary gears on the multi-stage planetary reduction assembly 32. A cover plate 67 is fixedly installed at the open end of the annular mounting base 62. Several positioning pins 68 are fixedly installed between the cover plate 67 and the annular mounting base 62. Pads 66 and torsion springs 69 are mounted on the positioning pins 68. The pawl 66 meshes with a ratchet 65. One pin of the torsion spring 69 is mounted on the pawl 66, and the other pin abuts against the inner wall of the annular mounting base 62. The secondary sun gear 63 can move axially relative to the annular mounting base 62. A locking washer 610 is provided between the secondary sun gear 63 and the brake nut 64, and the locking washer 610 is fitted onto the secondary sun gear 63. A locking nut 611 is provided between the locking washer 610 and the open end of the secondary sun gear 63, and the locking nut 611 is threadedly connected to the secondary sun gear 63. The end of the primary drive shaft 321 is provided with a hexagonal drive section 322, which is installed inside the brake shaft 51; the multi-stage planetary reduction assembly 32 meshes with the roller 4 and rotates, and the roller 4 is mounted on the main support 1 through bearings; an oil seal 8 is provided between the roller 4 and the main support 1.

[0027] In the specific operation process of this embodiment, under the default state, the disc spring 57 does not undergo elastic deformation, and the first brake assembly 5 is not in a braking state. The drive motor 2 drives the brake shaft 51 to rotate through the internal spline coupling 7. When the brake shaft 51 rotates, it drives the first-stage transmission shaft 321 to rotate. When the first-stage transmission shaft 321 rotates, the second brake assembly 6 and the multi-stage planetary reduction assembly 32 work synchronously. The planetary gears on the multi-stage planetary reduction assembly 32 will drive the drum 4 to rotate relative to the main support 1. When the electric winch needs to brake, the drum 4 stops rotating relative to the main support 1. At this time, the drive motor 2 immediately stops rotating, so the brake shaft 51 stops rotating. The roller 4 will tend to rotate due to inertia, and will rotate in the opposite direction to the brake shaft 51. Then the cam slider 55 will move axially relative to the first brake disc 52, thereby causing the second brake disc 53 to squeeze the disc spring 57. When the disc spring 57 is elastically deformed, the first brake disc 52 and the second brake disc 53 squeeze and contact the brake pad 54, thereby locking the brake shaft 51 and preventing the brake shaft 51 from driving the multi-stage planetary reduction assembly 32 to work, so the roller 4 cannot rotate. The outer wall of the brake pad 54 will also generate friction on the roller 4, so the roller 4 is stationary relative to the main support 1, preventing the electric winch from rotating during traction.

[0028] When the electric winch is in braking mode, the drive motor 2 immediately stops rotating, and the brake shaft 51 also stops rotating. The primary drive shaft 321 then immediately stops rotating, while the secondary sun gear 63 continues to rotate due to inertia. At this time, the secondary sun gear 63 is in a reverse state relative to the primary drive shaft 321, so the pawl 66 locks the ratchet 65, thus preventing the primary drive shaft 321 from rotating. The drum 4 is then locked, preventing slippage or reverse rotation. Simultaneously, the first brake assembly 5 and the second brake assembly 6 lock the drum 4, resulting in good and reliable braking and enhanced safety.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A large-tonnage double-brake electric winch, comprising a main body support (1), a driving motor (2) is installed at one end of the main body support (1), and a speed reducer assembly (3) is installed at the other end of the main body support (1), characterized in that, The speed reducer assembly (3) and the driving motor (2) are provided with a roller (4); the speed reducer assembly (3) and the driving motor (2) are provided with a first brake assembly (5) connecting the two, the first brake assembly (5) includes a brake shaft (51), one end of the brake shaft (51) is connected with the driving motor (2), the other end of the brake shaft (51) is connected with the speed reducer assembly (3); the speed reducer assembly (3) includes a speed reducer housing (31), the speed reducer housing (31) is provided with a multi-stage planetary reduction assembly (32) and a second brake assembly (6), the multi-stage planetary reduction assembly (32) includes a first-stage transmission shaft (321) connected with the brake shaft (51), the second brake assembly (6) includes a plurality of uniformly distributed first-stage planetary gears (61), the first-stage planetary gears (61) are meshed and connected with the first-stage transmission shaft (321).

2. A large tonnage dual brake electric winch as claimed in claim 1 wherein, The driving motor (2) and the first brake assembly (5) are provided with an inner spline coupling (7) connecting the two, the first brake assembly (5) further includes a first brake disc (52), a second brake disc (53), a brake pad (54), a cam slider (55), a brake pad block (56) and a pair of disc springs (57); the first brake disc (52), the second brake disc (53), the brake pad (54), the cam slider (55), the brake pad block (56) and the disc spring (57) are all sleeved and installed on the brake shaft (51); the disc spring (57) is arranged between the second brake disc (53) and the brake pad block (56), the brake pad (54) is arranged between the first brake disc (52) and the second brake disc (53), and the cam slider (55) is arranged in close contact with the first brake disc (52).

3. A large tonnage dual brake electric winch as claimed in claim 2 wherein, The inner spline coupling (7) is sleeved and installed on the outer layer of the cam slider (55) and the first brake disc (52); the first brake disc (52) is provided with a guide annular step (58), and the bottom of the cam slider (55) is arranged in close contact with the guide annular step (58); the outer shape contour of the cam slider (55) and the outer shape contour of the guide annular step (58) are adapted to each other.

4. A large tonnage dual brake electric winch as claimed in claim 2, wherein, The brake shaft (51) is provided with a first step (59), and the brake pad block (56) is installed on the first step (59); the brake pad (54) is in the form of a disc, and a gap is left between the outer wall of the brake pad (54) and the brake shaft (51); the outer wall of the brake pad (54) and the inner wall of the roller (4) are arranged in close contact.

5. The large tonnage dual brake electric winch of claim 1 wherein, The brake shaft (51) is installed in the drum (4) through a bearing near the end of the speed reducer assembly (3); the brake shaft (51) rotates synchronously with the primary transmission shaft (321), and the second brake assembly (6) further comprises an annular mounting seat (62), a secondary sun gear (63), a brake nut (64), a ratchet (65) and a pawl (66); the primary planetary gear (61) is installed on the brake nut (64), and each primary planetary gear (61) is in rotary connection with the brake nut (64); the secondary sun gear (63) is arranged on the outer layer of the primary transmission shaft (321), the brake nut (64) is in threaded connection with the secondary sun gear (63), and the primary transmission shaft (321) is in meshing engagement with the primary planetary gear (61); the ratchet (65) is arranged between the brake nut (64) and the secondary sun gear (63), and the ratchet (65) rotates synchronously with the secondary sun gear (63); the secondary sun gear (63) rotates in meshing engagement with the planetary gear on the multi-stage planetary speed reduction assembly (32).

6. A large tonnage dual brake electric winch as claimed in claim 5 wherein, The annular mounting seat (62) is fixedly provided with a cover plate (67) at an open end, a plurality of positioning pin shafts (68) are fixedly arranged between the cover plate (67) and the annular mounting seat (62), the pawl (66) and a torsional spring (69) are arranged on the positioning pin shaft (68), and the pawl (66) is in meshing engagement with the ratchet (65); one pin of the torsional spring (69) is arranged on the pawl (66), and the other pin of the torsional spring (69) abuts against the inner wall of the annular mounting seat (62).

7. A large tonnage dual brake electric winch as claimed in claim 5 wherein, The secondary sun gear (63) can axially move relative to the annular mounting seat (62); the locking washer (610) is arranged between the secondary sun gear (63) and the brake nut (64), and the locking washer (610) is attached to the secondary sun gear (63); the locking nut (611) is arranged between the locking washer (610) and the open end of the secondary sun gear (63), and the locking nut (611) is in threaded connection with the secondary sun gear (63).

8. A large tonnage dual brake electric winch as claimed in claim 5 wherein, The primary transmission shaft (321) is provided with a hexagonal transmission part (322) at the end, the hexagonal transmission part (322) is arranged in the brake shaft (51); the multi-stage planetary speed reduction assembly (32) rotates in meshing engagement with the drum (4), the drum (4) is arranged on the main body support (1) through a bearing; and the drum (4) is provided with an oil seal (8) between the drum (4) and the main body support (1).

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