Electric winch with quick return self-stop function

Abstract

The utility model discloses an electric capstan with quick return self -stop function, including main body support, the left and right sides of main body support are equipped with motor assembly and speed reducer component respectively, be equipped with the transmission shaft of both's connection between motor assembly and speed reducer component, still be equipped with the drum of rotary connection with it on main body support, drum and speed reducer component engagement rotation, speed reducer component includes speed reducer casing, planetary gear assembly and internal toothed ring, and speed reducer casing is equipped with the clutching component of rotary connection with it, and internal toothed ring moves axially when clutching component rotates relative planetary gear assembly, speed reducer component still includes primary sun gear axle, and primary sun gear axle connects transmission shaft, and still be equipped with brake assembly in speed reducer component, the utility model discloses setting brake assembly in speed reducer component, and the braking process is smooth and good braking effect, and drum can brake fast and wear less when rotating, and through clutching component simultaneously, can conveniently switch the working gear position of speed reducer component.

Description

Technical Field

[0001] This utility model belongs to the field of electric winch technology, specifically relating to an electric winch with a fast return and automatic stop function. Background Technology

[0002] A winch is an auxiliary device used for vehicle self-rescue or as a towing device. Existing winches typically include a braking mechanism and a drum. The braking mechanism controls the drum's rotation to stop, making it a crucial structure within the winch. A patent with publication number CN203624946U discloses a winch braking device including an active seat, a reverse torsion spring, a passive seat, and a brake sleeve. The active and passive seats are coaxially connected and rotate relative to each other. The reverse torsion spring is sleeved on the cylindrical sections of the active and passive seats. The active seat, reverse torsion spring, and passive seat are placed within the brake sleeve. Initially, the outer coil of the reverse torsion spring makes frictional contact with the inner wall of the brake sleeve, and the initial frictional force is less than the frictional force generated by the expansion of the reverse torsion spring against the inner wall of the brake sleeve during braking. Existing winches' active and passive seats are prone to wear after prolonged braking, resulting in poor braking performance. Furthermore, the torque on the drive shaft during braking is relatively high, making the drive shaft prone to wear, which affects the normal rotation of the drum. Therefore, it is necessary to design an electric winch with a rapid return and automatic stop function to overcome these difficulties. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by designing an electric winch with a fast return and automatic stop function. By incorporating a brake assembly within the reducer assembly, the braking process is smooth and the braking effect is good. The drum can brake quickly and with minimal wear while rotating. Simultaneously, the clutch assembly allows for convenient switching of the reducer assembly's working gears.

[0004] The objective of this invention is achieved through the following technical solution: an electric winch with a fast return and automatic stop function, comprising a main support frame, with a motor assembly and a reducer assembly respectively disposed on the left and right sides of the main support frame; a transmission shaft connecting the motor assembly and the reducer assembly is disposed between the two; a roller rotatably connected to the main support frame is also disposed on the main support frame, the roller meshing and rotating with the reducer assembly; the reducer assembly comprises a reducer housing, a planetary gear assembly and an internal gear ring, the reducer housing is provided with a clutch assembly rotatably connected to the reducer housing, and when the clutch assembly rotates, the internal gear ring moves axially relative to the planetary gear assembly; the reducer assembly further comprises a primary sun gear shaft, the primary sun gear shaft is connected to the transmission shaft, and a brake assembly is also disposed within the reducer assembly.

[0005] Preferably, the motor assembly includes a drive motor and a motor housing, both of which are fixedly mounted on the main support, with the motor housing disposed on the outer layer of the drive motor; a first coupling connecting the drive motor and the transmission shaft is provided, and a second coupling connecting the transmission shaft and the primary sun gear shaft is provided; the main support is also provided with an electrical control assembly.

[0006] Preferably, the electrical control assembly includes an electrical control box and a relay. The electrical control box is mounted on the main support, and the relay is installed inside the electrical control box. The relay is electrically connected to the drive motor, and a commutator is installed on the motor shaft of the drive motor.

[0007] By incorporating relays, the on / off state of the drive motor can be easily controlled; by installing a commutator within the drive motor, the direction of rotation can be easily controlled, allowing the drum to rotate in both directions for easy rope deployment and retraction. By using a first coupling and a second coupling, the primary sun gear shaft can rotate synchronously when the drive motor drives the transmission shaft.

[0008] Preferably, the reducer housing is fixedly mounted on the main support, and an internal gear ring is rotatably connected to it inside the reducer housing; the clutch assembly includes a clutch handle, a clutch cam, and a limiting screw, the clutch handle and the clutch cam are fixedly connected, the clutch cam is rotatably connected to the reducer housing, and a limiting screw for fixing is provided between the clutch cam and the reducer housing; the clutch cam is connected to the internal gear ring, and the internal gear ring moves relative to the main support when the clutch cam is rotated, and a planetary gear assembly meshing with it is provided inside the internal gear ring.

[0009] Preferably, the main support is provided with annular teeth that mesh with the internal gear ring, and the internal gear ring is engaged with the annular teeth when it moves close to the main support.

[0010] Preferably, the clutch cam is provided with a clearance groove, and the limiting screw passes through the reducer housing and extends into the clearance groove; the bottom of the clutch cam is provided with an eccentric protrusion, and the outer layer of the internal gear ring is provided with an annular groove; the eccentric protrusion is disposed in the annular groove, and the outer contour of the eccentric protrusion matches the outer contour of the annular groove; a sealing ring is provided between the clutch handle and the reducer housing, and the sealing ring is positioned facing the open end of the reducer housing.

[0011] When the internal gear ring meshes with the ring teeth on the main support, the internal gear ring cannot rotate relative to the reducer housing. Therefore, when the first-stage sun gear shaft rotates, all gears on the planetary gear assembly rotate synchronously, causing the planetary gear assembly to drive the roller to rotate, and the clutch assembly is in the working position. When it is necessary to switch the clutch assembly from the working position to neutral, the clutch handle drives the clutch cam to rotate. The clutch cam has an eccentric protrusion at its bottom, which causes the clutch cam to disengage the internal gear ring from the ring teeth on the main support. The internal gear ring can then rotate relative to the reducer housing. When the first-stage sun gear shaft rotates, the gears on the planetary gear assembly will be in a free-spinning state, preventing the planetary gear assembly from driving the roller to rotate, and the clutch assembly is in the neutral position. During gear shifting, the motor assembly is de-energized. When the clutch assembly shifts from neutral to working, the internal gear ring may not be aligned with the ring teeth. In this case, manually rotating the roller will cause the roller to drive the planetary gear assembly to rotate, which in turn drives the internal gear ring to rotate, thus engaging the internal gear ring with the ring teeth. A sealing ring is installed here. The sealing ring not only has a sealing function, but also a damping effect, so that the clutch handle will not turn accidentally.

[0012] Preferably, the drive shaft is rotatably connected to the planetary gear assembly; the planetary gear assembly includes a second-stage sun gear, a first-stage planetary gear, and a second-stage planetary gear; the brake assembly includes a brake seat, a ratchet, and a brake nut; the ratchet is disposed between the second-stage sun gear and the brake nut; the brake nut is threadedly connected to the second-stage sun gear; the brake seat is provided with a pawl; the first-stage planetary gear meshes with the first-stage sun gear shaft, and the second-stage planetary gear meshes with the second-stage sun gear; the brake seat is disposed within the reducer housing, and the two remain relatively stationary.

[0013] Preferably, the end of the secondary sun gear is provided with a circular nut that is threadedly connected to it, and the end of the secondary sun gear is also provided with an annular mounting groove, in which a retaining washer is provided; when the circular nut is threadedly connected to the secondary sun gear, the retaining washer is fitted to the circular nut.

[0014] Preferably, the secondary sun gear is sleeved and installed on the outer layer of the primary sun gear shaft, and the secondary sun gear can rotate relative to the primary sun gear shaft; a locating pin is fixedly installed inside the brake seat, and a pawl and a torsion spring are installed on the locating pin; the pawl and the ratchet mesh with each other, 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 brake seat; the ratchet is installed on the step of the secondary sun gear, and the end of the secondary sun gear is provided with a circular nut that is threadedly connected to it; the brake nut is threadedly connected to the secondary sun gear, and a gap is left between the brake nut and the circular nut.

[0015] When the electric winch is operating normally, the motor assembly drives the drive shaft to rotate, which in turn drives the primary sun gear shaft. The primary sun gear shaft then drives the secondary sun gear, causing both the primary and secondary planetary gears to rotate synchronously. This results in all gears on the planetary gear assembly rotating, which in turn drives the drum. The rotation of the secondary sun gear drives the ratchet to rotate in the same direction, preventing the pawl from getting stuck. When the electric winch needs to brake, the motor assembly immediately stops working, causing the drive shaft and the primary sun gear shaft to stop rotating immediately. However, due to inertia, the planetary gear assembly continues to rotate, causing the secondary sun gear to rotate in the opposite direction relative to the brake nut. This causes the brake nut to clamp the ratchet, which is then caught by the pawl, instantly stopping the secondary sun gear. Consequently, the entire planetary gear assembly stops rotating, and the winch is in a braking state. Controlling the rotation of the planetary gear assembly through the ratchet and pawl makes braking more reliable and reduces wear. The use of a round nut and a locking washer limits the brake nut's movement, preventing it from disengaging from the secondary sun gear.

[0016] Compared with the prior art, the present invention has the following advantages: 1. The present invention sets a brake assembly in the reducer assembly, and controls the planetary gear assembly in the reducer assembly to stop rotating through the brake assembly, resulting in fast and reliable braking effect; 2. The planetary gear assembly is controlled to stop rotating through the braking mode of ratchet and pawl, which ensures stable and reliable braking and prevents the roller from rotating relative to the main support during braking; at the same time, the ratchet and pawl braking is relatively smooth, resulting in less wear on the planetary gear assembly; 3. The clutch assembly has a simple structure, and the clutch cam can be controlled to rotate through the clutch handle, thereby switching the position of the internal gear ring, making the gear shifting of the clutch assembly more reliable. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a diagram of the internal structure of the present invention;

[0019] Figure 3 This is an exploded view of the reducer assembly;

[0020] Figure 4 This is an exploded view of the clutch assembly.

[0021] Figure 5 This is an exploded view of the brake assembly.

[0022] Figure 6 This is a three-dimensional diagram of the second-stage sun gear;

[0023] Markings in the diagram: 1. Main support frame; 2. Motor assembly; 21. Drive motor; 22. Motor housing; 23. Commutator; 3. Reducer assembly; 31. Reducer housing; 32. Planetary gear assembly; 33. Internal gear ring; 34. First-stage sun gear shaft; 35. Second-stage sun gear; 36. First-stage planetary gear; 37. Second-stage planetary gear; 4. Drive shaft; 5. Roller; 6. Clutch assembly; 61. Clutch handle; 62. Clutch cam; 63. Limiting... 64. Positioning screw; 65. Leaving groove; 66. Eccentric protrusion; 7. Sealing ring; 8. Brake assembly; 9. Brake seat; 10. Ratchet; 11. Brake nut; 2. Pawl; 3. Round nut; 4. Locking washer; 5. Positioning pin; 66. Torsion spring; 77. First coupling; 8. Second coupling; 9. Electrical control assembly; 101. Electrical control box; 102. Relay; 11. Ring tooth; 12. Annular groove; 13. Mounting groove. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0025] like Figures 1 to 6 As shown, this embodiment discloses an electric winch with a fast return and automatic stop function, including a main support 1. A motor assembly 2 and a reducer assembly 3 are respectively provided on the left and right sides of the main support 1. A transmission shaft 4 connects the motor assembly 2 and the reducer assembly 3. A roller 5 is also provided on the main support 1 and rotatably connected thereto. The roller 5 meshes with and rotates with the reducer assembly 3. The reducer assembly 3 includes a reducer housing 31, a planetary gear assembly 32, and an internal gear ring 33. The reducer housing 31 is provided with a clutch assembly 6 rotatably connected thereto. When the clutch assembly 6 rotates, the internal gear ring 33 moves axially relative to the planetary gear assembly 32. The reducer assembly 3 also includes a first-stage sun gear shaft 34, which is connected to the transmission shaft 4. A brake assembly 7 is also provided inside the reducer assembly 3.

[0026] The motor assembly 2 includes a drive motor 21 and a motor housing 22, both of which are fixedly mounted on the main support 1. The motor housing 22 is disposed on the outer layer of the drive motor 21. A first coupling 8 is provided between the drive motor 21 and the transmission shaft 4, and a second coupling 9 is provided between the transmission shaft 4 and the primary sun gear shaft 34. An electrical control assembly 10 is also provided on the main support 1. The electrical control assembly 10 includes an electrical control box 101 and a relay 102. The electrical control box 101 is mounted on the main support 1, and the relay 102 is installed inside the electrical control box 101. The relay 102 is electrically connected to the drive motor 21, and a commutator 23 is installed on the motor shaft of the drive motor 21.

[0027] The reducer housing 31 is fixedly mounted on the main support 1. An internal gear ring 33 is rotatably connected to the reducer housing 31. The clutch assembly 6 includes a clutch handle 61, a clutch cam 62, and a limiting screw 63. The clutch handle 61 and the clutch cam 62 are fixedly connected. The clutch cam 62 is rotatably connected to the reducer housing 31. A limiting screw 63 for fixing is provided between the clutch cam 62 and the reducer housing 31. The clutch cam 62 connects to the internal gear ring 33. When the clutch cam 62 is rotated, the internal gear ring 33 moves relative to the main support 1. A planetary gear assembly 32 meshes with the internal gear ring 33. The main support 1 has an annular tooth 11 that meshes with the internal gear ring 33. When the internal gear ring 33 moves closer to the main support 1, the internal gear ring 33 is engaged with the annular tooth 11. The clutch cam 62 is provided with a clearance groove 64, and the limiting screw 63 passes through the reducer housing 31 and extends into the clearance groove 64; the bottom of the clutch cam 62 is provided with an eccentric protrusion 65, and the outer layer of the internal gear ring 33 is provided with an annular groove 12; the eccentric protrusion 65 is disposed in the annular groove 12, and the outer contour of the eccentric protrusion 65 is adapted to the outer contour of the annular groove 12; a sealing ring 66 is provided between the clutch handle 61 and the reducer housing 31, and the sealing ring 66 is positioned facing the opening end of the reducer housing 31.

[0028] The drive shaft 4 is rotatably connected to the planetary gear assembly 32; the planetary gear assembly 32 includes a second-stage sun gear 35, a first-stage planetary gear 36, and a second-stage planetary gear 37; the brake assembly 7 includes a brake seat 71, a ratchet 72, and a brake nut 73; the ratchet 72 is disposed between the second-stage sun gear 35 and the brake nut 73; the brake nut 73 is threadedly connected to the second-stage sun gear 35; the brake seat 71 is provided with a pawl 74; the first-stage planetary gear 36 meshes with the first-stage sun gear shaft 34, and the second-stage planetary gear 37 meshes with the second-stage sun gear 35; the brake nut 73 is provided with a plurality of annularly distributed first-stage planetary gears 36, each of which is rotatably connected to the brake nut 73; the brake seat 71 is disposed within the reducer housing 31, and the two remain relatively stationary. The end of the secondary sun gear 35 is provided with a circular nut 75 that is threadedly connected to it. The end of the secondary sun gear 35 is also provided with an annular mounting groove 13, and a stop washer 76 is provided in the annular mounting groove 13. When the circular nut 75 is threadedly connected to the secondary sun gear 35, the stop washer 76 is fitted to the circular nut 75. The secondary sun gear 35 is sleeved and installed on the outer layer of the primary sun gear shaft 34, and the secondary sun gear 35 can rotate relative to the primary sun gear shaft 34; a positioning pin 77 is fixedly installed inside the brake seat 71, and a pawl 74 and a torsion spring 78 are installed on the positioning pin 77; the pawl 74 meshes with the ratchet 72, one pin of the torsion spring 78 is installed on the pawl 74, and the other pin of the torsion spring 78 abuts against the inner wall of the brake seat 71; the ratchet 72 is installed on the step of the secondary sun gear 35, and the end of the secondary sun gear 35 is provided with a circular nut 75 that is threadedly connected to it; the brake nut 73 is threadedly connected to the secondary sun gear 35, and a gap is left between the brake nut 73 and the circular nut 75.

[0029] The specific operation process of this embodiment is as follows: When the internal gear ring 33 meshes with the ring gear 11 on the main support 1, the internal gear ring 33 cannot rotate relative to the reducer housing 31. When the first-stage sun gear shaft 34 rotates, the gears on the planetary gear assembly 32 rotate synchronously, causing the planetary gear assembly 32 to drive the roller 5 to rotate, and the clutch assembly 6 is in the working position. When it is necessary to switch the clutch assembly 6 from the working position to neutral, the clutch handle 61 drives the clutch cam 62 to rotate. The clutch cam 62 has an eccentric protrusion 65 at its bottom, causing the clutch cam 62 to drive the internal gear ring 33 to disengage from the ring gear 11 on the main support. Then, the internal gear ring 33 can rotate relative to the reducer housing 31. When the first-stage sun gear shaft 34 rotates, the gears on the planetary gear assembly 32 will be in an idle state, preventing the planetary gear assembly 32 from driving the roller 5 to rotate, and the clutch assembly 6 is in the neutral state. During gear switching, the motor assembly 2 is de-energized. When the clutch assembly 6 switches from neutral to working position, the internal gear ring 33 may not be aligned with the ring gear 11. In this case, by manually rotating the roller 5, the roller 5 will drive the planetary gear assembly 32 to rotate, and the planetary gear assembly 32 will drive the internal gear ring 33 to rotate, so that the internal gear ring 33 meshes with the ring gear 11.

[0030] When the electric winch is operating normally, the motor assembly 2 drives the drive shaft 4 to rotate, which in turn drives the first-stage sun gear shaft 34 to rotate. The rotation of the first-stage sun gear shaft 34 drives the second-stage sun gear 35 to rotate, causing the first-stage planetary gear 36 and the second-stage planetary gear 37 to rotate synchronously. This causes all the gears on the planetary gear assembly 32 to rotate, thus driving the drum 5 to rotate. The rotation of the second-stage sun gear 35 drives the ratchet 72 to rotate in the same direction, preventing the pawl 74 from engaging the ratchet 72. When the electric winch needs to brake, the motor assembly 2 immediately stops working, causing the drive shaft 4 and the first-stage sun gear shaft 34 to stop rotating immediately. However, the planetary gear assembly 32 continues to rotate due to inertia, causing the second-stage sun gear 35 to rotate in the opposite direction relative to the brake nut 73. This causes the brake nut 73 to clamp the ratchet 74, which is then engaged by the pawl 74, instantly stopping the second-stage sun gear 35. Consequently, the entire planetary gear assembly 32 stops rotating, and the electric winch is in a braking state.

[0031] 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. An electric winch with a fast return and automatic stop function, comprising a main support frame (1), characterized in that, The main support (1) is provided with a motor assembly (2) and a reducer assembly (3) on its left and right sides respectively; a transmission shaft (4) is provided between the motor assembly (2) and the reducer assembly (3) to connect the two; a roller (5) is also provided on the main support (1) and rotates therewith; the roller (5) meshes with the reducer assembly (3) and rotates; the reducer assembly (3) includes a reducer housing (31), a planetary gear assembly (32) and an internal gear ring (33); the reducer housing (31) is provided with a clutch assembly (6) that rotates therewith; when the clutch assembly (6) rotates, the internal gear ring (33) moves axially relative to the planetary gear assembly (32); the reducer assembly (3) also includes a first-stage sun gear shaft (34), which is connected to the transmission shaft (4); a brake assembly (7) is also provided inside the reducer assembly (3).

2. The electric winch with rapid return and automatic stop function according to claim 1, characterized in that, The motor assembly (2) includes a drive motor (21) and a motor housing (22). Both the drive motor (21) and the motor housing (22) are fixedly mounted on the main support (1). The motor housing (22) is located on the outer layer of the drive motor (21). A first coupling (8) is provided between the drive motor (21) and the transmission shaft (4) to connect the two. A second coupling (9) is provided between the transmission shaft (4) and the first-stage sun gear shaft (34) to connect the two. An electrical control assembly (10) is also provided on the main support (1).

3. The electric winch with rapid return and automatic stop function according to claim 2, characterized in that, The electrical control assembly (10) includes an electrical control box (101) and a relay (102). The electrical control box (101) is mounted on the main support (1), and the relay (102) is installed inside the electrical control box (101). The relay (102) is electrically connected to the drive motor (21), and a commutator (23) is installed on the motor shaft of the drive motor (21).

4. The electric winch with quick return and automatic stop function according to claim 1, characterized in that, The reducer housing (31) is fixedly mounted on the main support (1), and an internal gear ring (33) is rotatably connected to it inside the reducer housing (31); the clutch assembly (6) includes a clutch handle (61), a clutch cam (62) and a limit screw (63), the clutch handle (61) and the clutch cam (62) are fixedly connected, the clutch cam (62) is rotatably connected to the reducer housing (31), and a limit screw (63) for fixing is provided between the clutch cam (62) and the reducer housing (31); the clutch cam (62) is connected to the internal gear ring (33), and when the clutch cam (62) is rotated, the internal gear ring (33) moves relative to the main support (1), and a planetary gear assembly (32) meshing with it is provided inside the internal gear ring (33).

5. The electric winch with rapid return and automatic stop function according to claim 4, characterized in that, The main support (1) is provided with an annular tooth (11) that meshes with the internal gear ring (33). When the internal gear ring (33) moves close to the main support (1), the internal gear ring (33) gets stuck on the annular tooth (11).

6. The electric winch with quick return and automatic stop function according to claim 4, characterized in that, The clutch cam (62) is provided with a relief groove (64), and the limiting screw (63) passes through the reducer housing (31) and extends into the relief groove (64); the bottom of the clutch cam (62) is provided with an eccentric protrusion (65), and the outer layer of the internal gear ring (33) is provided with an annular groove (12); the eccentric protrusion (65) is provided in the annular groove (12), and the outer contour of the eccentric protrusion (65) is adapted to the outer contour of the annular groove (12); a sealing ring (66) is provided between the clutch handle (61) and the reducer housing (31), and the sealing ring (66) is provided facing the opening end of the reducer housing (31).

7. The electric winch with quick return and automatic stop function according to claim 1, characterized in that, The drive shaft (4) is rotatably connected to the planetary gear assembly (32); the planetary gear assembly (32) includes a second-stage sun gear (35), a first-stage planetary gear (36), and a second-stage planetary gear (37); the brake assembly (7) includes a brake seat (71), a ratchet (72), and a brake nut (73); the ratchet (72) is disposed between the second-stage sun gear (35) and the brake nut (73); the brake nut (73) is threadedly connected to the second-stage sun gear (35); the brake seat (71) is provided with a pawl (74); the first-stage planetary gear (36) meshes with the first-stage sun gear shaft (34); the second-stage planetary gear (37) meshes with the second-stage sun gear (35); the brake seat (71) is disposed in the reducer housing (31), and the two remain relatively stationary.

8. The electric winch with quick return and automatic stop function according to claim 7, characterized in that, The end of the secondary sun gear (35) is provided with a circular nut (75) that is threadedly connected to it. The end of the secondary sun gear (35) is also provided with an annular mounting groove (13). A stop washer (76) is provided in the annular mounting groove (13). When the circular nut (75) is threadedly connected to the secondary sun gear (35), the stop washer (76) is fitted to the circular nut (75).

9. The electric winch with quick return and automatic stop function according to claim 7, characterized in that, The secondary sun gear (35) is sleeved on the outer layer of the primary sun gear shaft (34), and the secondary sun gear (35) can rotate relative to the primary sun gear shaft (34); a positioning pin (77) is fixedly installed inside the brake seat (71), and a pawl (74) and a torsion spring (78) are installed on the positioning pin (77); the pawl (74) meshes with the ratchet (72), one pin of the torsion spring (78) is installed on the pawl (74), and the other pin of the torsion spring (78) abuts against the inner wall of the brake seat (71); the ratchet (72) is installed on the step of the secondary sun gear (35), and the end of the secondary sun gear (35) is provided with a circular nut (75) threadedly connected to it; the brake nut (73) is threadedly connected to the secondary sun gear (35), and a gap is left between the brake nut (73) and the circular nut (75).

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