Electric capstan

Abstract

The utility model discloses an electric capstan which comprises a motor, a roller, a driving shaft and a transmission module, and the transmission module comprises a first-stage speed reduction assembly, a second-stage speed reduction assembly and a third-stage speed reduction assembly which are sequentially arranged from the side away from the roller to the side close to the roller; the second-stage speed reduction assembly comprises a second-stage annular inner gear ring and a second-stage planet wheel set meshed with the second-stage annular inner gear ring, and a fixing ring is arranged in the gearbox shell and provided with an outer tooth structure. When the second-stage annular inner gear ring slides towards the first-stage speed reduction assembly, the second-stage annular inner gear ring is meshed with the outer tooth structure of the fixing ring and keeps static relative to the gearbox shell, and planet gears of the second-stage planet gear set rotate in the second-stage annular inner gear ring to form a low-speed high-torque transmission state. When the second-stage annular inner gear ring slides in the direction away from the first-stage speed reduction assembly and is separated from meshing of the fixing ring outer tooth structure, the whole second-stage planetary gear set and the second-stage annular inner gear ring synchronously rotate, and a high-speed low-torque transmission state is formed.

Description

Technical Field

[0001] This utility model relates to the field of winch technology, and in particular to an electric winch. Background Technology

[0002] Electric winches, commonly used in off-road vehicles, construction machinery, and ships for lifting and traction, directly impact operational efficiency and ease of use. Existing winches often employ fixed transmission structures with fixed transmission ratios, making it difficult to adapt to the flexible speed and traction requirements under varying working conditions. Under no-load or light-load conditions, traditional winches often suffer from low efficiency and a poor user experience due to their inability to increase rope winding speed.

[0003] Therefore, how to achieve free switching between high and low speeds while ensuring a compact structure and moderate manufacturing cost has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0004] The purpose of this invention is to provide an electric winch that, while ensuring a compact structure and moderate manufacturing cost, allows for free switching between high and low speeds.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] An electric winch includes a motor, a drum, a drive shaft, and a transmission module. The motor drives the drive shaft, which is located inside the drum, to rotate. The drive shaft drives the drum to rotate via the transmission module. The transmission module includes a gearbox housing and a gearbox bracket, which cooperate to form an internal mounting cavity. A first-stage reduction assembly, a second-stage reduction assembly, and a third-stage reduction assembly are sequentially arranged in the mounting cavity from the side away from the drum to the side closer to the drum. The second-stage reduction assembly includes a second-stage annular internal gear ring and a second-stage planetary gear set meshing with it. A fixing ring with an external tooth structure is provided inside the gearbox housing for switching working states.

[0007] When the secondary annular internal gear ring slides toward the primary reduction assembly, it meshes with the external tooth structure of the fixed ring and remains stationary relative to the gearbox housing. The planetary gears of the secondary planetary gear set rotate within the secondary annular internal gear ring, forming a low-speed, high-torque transmission state.

[0008] When the secondary annular internal gear ring slides away from the primary reduction assembly and disengages from the meshing of the fixed ring external gear structure, the entire secondary planetary gear set rotates synchronously with the secondary annular internal gear ring, forming a high-speed, low-torque transmission state.

[0009] The transmission structure is equipped with a three-layer reduction assembly, and an axially movable annular internal gear ring is introduced in the second-level reduction assembly. It can flexibly switch the transmission state according to different usage scenarios, taking into account both low-speed high torque and high-speed low torque requirements, and improving the electric winch's ability to adapt to complex working conditions.

[0010] Preferably, the first-stage reduction assembly includes a first-stage annular internal gear ring, a first-stage planetary gear set meshing with it, and a first ring disk. The first ring disk is pivotally connected to the centers of multiple planetary gears of the first-stage planetary gear set via multiple pivot shafts. The sun gear of the first-stage planetary gear set is fixedly connected to the end of the drive shaft and rotates synchronously with it. The first ring disk is sleeved on the outside of the sun gear of the second-stage planetary gear set to drive the sun gear to rotate.

[0011] The drive transmission to the next reduction stage is achieved through the nesting structure of the first ring disc. The structure is compact, the transmission efficiency is high, and it helps to reduce the size of the overall structure.

[0012] Preferably, the secondary reduction assembly further includes a second ring disk with an external tooth structure, the second ring disk being pivotally connected to the centers of multiple planetary gears of the secondary planetary gear set via multiple pivot shafts;

[0013] When the secondary ring internal gear is engaged with the fixed ring and remains stationary, the secondary ring internal gear disengages from the second ring disk, and the sun gear of the secondary planetary gear set rotates, causing multiple planet gears to rotate within the secondary ring internal gear.

[0014] When the secondary ring internal gear disengages from the fixed ring external gear structure, the secondary ring internal gear meshes with the external gear structure of the second ring disk, and the secondary planetary internal gear and the secondary planetary gear set rotate synchronously as a whole.

[0015] It enables efficient switching of the deceleration component from its own rotation state to the overall rotation state, simplifies the traditional clutch structure, and improves reliability and operability.

[0016] Preferably, the three-stage reduction assembly includes a three-stage annular internal gear ring, a three-stage planetary gear set meshing with it, and a third annular disk. The third annular disk is pivotally connected to the centers of multiple planetary gears of the three-stage planetary gear set via multiple pivot shafts, and the third annular disk is fixedly connected or driven to the roller. The sun gear of the three-stage planetary gear set meshes with the inner ring of the second annular disk, thereby driving the three-stage planetary gear set to rotate through the rotation of the second annular disk, which in turn drives the roller to rotate.

[0017] High-speed and low-speed switching can be accomplished through a simple and reliable mechanical structure, which is convenient to use, quick to adjust, and requires no electronic control system, thus reducing costs and the risk of failure.

[0018] Preferably, the gearbox housing has a mounting portion extending radially outward, and the mounting hole penetrates the mounting portion; the drive handle is provided with a limiting notch, and a limiting shaft is fixedly provided on the side wall of the mounting portion. The limiting shaft extends into the limiting notch to prevent the drive handle from coming out and to limit its rotation angle, thereby controlling the axial movement range of the secondary annular internal gear ring.

[0019] The limiting structure design can effectively limit the operable range or handle detachment, improving the overall safety and operational stability of the machine.

[0020] Preferably, the drive handle has an L-shaped structure. The L-shaped handle provides greater grip torque, requires less effort to operate, and is suitable for different user operating habits.

[0021] Preferably, a drive ring is fixedly installed inside the gearbox bracket. The drive ring has an external tooth structure, and the three-stage annular internal gear ring meshes with the external tooth structure of the drive ring.

[0022] The fixed meshing structure of the drive ring makes it easier to process the gearbox bracket, and facilitates the maintenance and replacement of the three-stage reduction assembly.

[0023] Compared with the prior art, the advantages of this utility model are:

[0024] 1. This application utilizes a two-stage annular internal gear ring with an axial sliding structure design, enabling switching between low-speed, high-torque and high-speed, low-torque modes. The low-speed mode is suitable for slow traction of heavy-load or jammed objects, while the high-speed mode is suitable for rapid winding of light-load objects, meeting the diverse needs of electric winches in different application scenarios and improving the applicability and versatility of the entire machine.

[0025] 2. The transmission module adopts a coaxial multi-stage planetary reduction structure, which completes multiple transmission speed reductions within a limited space, significantly improving torque output capability. It is suitable for space-constrained applications such as pickup trucks, off-road vehicles, and electric rescue equipment, while reducing the overall size of the machine.

[0026] 3. The L-shaped drive handle, eccentric shaft, and annular groove structure located on the outside allow operators to quickly and manually switch transmission modes without disassembling or replacing parts, making operation convenient. The eccentric shaft transmission structure ensures that the sliding path is controlled and the positioning is clear. The limit structure prevents overtravel and avoids internal interference or assembly misalignment.

[0027] 4. During the switching process, the meshing conversion of the secondary internal gear ring is achieved through the external gear structure of the "fixed ring" and the "second ring disc", which ensures the continuity of power transmission and the mechanical stability during the switching process, reduces the switching impact force, extends the life of each gear, and improves the reliability of use. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the electric winch in this utility model;

[0030] Figure 2 This is a cross-sectional view of the electric winch in this utility model. Figure 1

[0031] Figure 3 This is a cross-sectional view of the electric winch in this utility model. Figure 2 ;

[0032] Figure 4 This is a schematic diagram of the explosion of the electric winch in this utility model. Figure 1 ;

[0033] Figure 5 This is a schematic diagram of the explosion of the electric winch in this utility model. Figure 2 .

[0034] In the diagram: 1. Motor; 2. Roller; 3. Drive shaft; 4. Transmission module; 41. Gearbox housing; 411. Mounting part; 412. Mounting hole; 42. Gearbox bracket; 5. First-stage reduction assembly; 51. First-stage annular internal gear ring; 52. First-stage planetary gear set; 53. First ring disc; 6. Second-stage reduction assembly; 61. Second-stage annular internal gear ring; 611. Annular groove; 62. Second-stage planetary gear set; 63. Second ring disc; 641. Eccentric shaft; 642. Drive handle; 6421. Limiting notch; 643. Limiting shaft; 65. Fixing ring; 7. Third-stage reduction assembly; 71. Third-stage annular internal gear ring; 72. Third-stage planetary gear set; 73. Third ring disc; 74. Drive ring. Detailed Implementation

[0035] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0036] Example 1:

[0037] Please see the appendix Figure 1 To be continued Figure 5 This utility model embodiment provides an electric winch, including a motor 1, a drum 2, a drive shaft 3, and a transmission module 4.

[0038] The motor 1 is installed inside the housing of the electric winch, and its output shaft is connected to the drive shaft 3 through a coupling. The drive shaft 3 extends axially and passes through the center of the drum 2 to drive the drum 2 to rotate around the shaft, thereby realizing the winding and unwinding of the rope.

[0039] The transmission module 4 is located on the side of the roller 2 away from the motor 1. The transmission module 4 includes a gearbox housing 41 and a gearbox bracket 42, which together form an internal mounting cavity. In this mounting cavity, a first-stage reduction assembly 5, a second-stage reduction assembly 6 and a third-stage reduction assembly 7 are arranged sequentially from the side away from the roller 2 to the side closer to the roller 2.

[0040] The primary reduction assembly 5 includes a primary annular internal gear ring 51, a primary planetary gear set 52, and a first ring disk 53. The primary annular internal gear ring 51 is fixed inside the gearbox housing 41. Multiple planetary gears of the primary planetary gear set 52 mesh inside the primary annular internal gear ring 51, and the planetary gears are pivotally connected to the first ring disk 53 via pivot shafts. The sun gear of the primary planetary gear set 52 is fixedly connected to the drive shaft 3. When the motor drives the drive shaft 3 to rotate, the primary reduction assembly 5 completes the first-stage speed reduction.

[0041] The secondary reduction assembly 6 includes a secondary annular internal gear ring 61, a secondary planetary gear set 62, and a second ring disk 63. The secondary annular internal gear ring 61 is axially movable and has an annular groove 611 on its outer surface. An eccentric shaft 641 is provided in the groove and is fixed to an L-shaped drive handle 642 on the gearbox housing 41. By rotating the drive handle 642, the secondary annular internal gear ring 61 can be driven to slide axially, thereby engaging or disengaging with the fixed ring 65 (which has an external tooth structure), thus switching the reduction state. Specifically, the gearbox housing 41 has a mounting portion 411 extending radially outward, and a mounting hole 412 penetrates the mounting portion 411. The drive handle 642 has a limiting notch 6421, and a limiting shaft 643 is fixedly provided on the side wall of the mounting portion 411. The limiting shaft 643 extends into the limiting notch 6421 to prevent the drive handle 642 from disengaging and to limit its rotation angle, thereby controlling the axial movement range of the secondary annular internal gear ring 61.

[0042] When the secondary annular internal gear ring 61 slides towards the primary reduction assembly 5 and engages with the fixed ring 65 to remain stationary, the first annular disk 53 of the primary reduction assembly 5 meshes with the sun gear of the secondary planetary gear set 62, causing the sun gear to drive the planet gears of the secondary planetary gear set 62 to rotate within the secondary annular internal gear ring 61, achieving low-speed, high-torque output. When the secondary annular internal gear ring 61 slides away from the primary reduction assembly 5 and engages with the external tooth structure of the second annular disk 63, the entire secondary planetary gear set 62 rotates synchronously with the secondary annular internal gear ring 61, achieving high-speed, low-torque output.

[0043] The three-stage reduction assembly 7 includes a three-stage annular internal gear ring 71, a three-stage planetary gear set 72, and a third annular disk 73. The planetary gears of the three-stage planetary gear set 72 are pivotally connected to the third annular disk 73 via pivot shafts. The third annular disk 73 is fixedly connected to the roller 2 or connected via a gear transmission structure. The sun gear of the three-stage planetary gear set 72 meshes with the inner ring of the second annular disk 63. When the second annular disk 63 rotates, it drives the three-stage reduction assembly 7 to rotate, ultimately driving the roller 2.

[0044] In addition, a drive ring 74 is fixed inside the gearbox bracket 42. The external tooth structure of the drive ring 74 meshes with the three-stage annular internal gear ring 71, thereby further stabilizing the output of the three-stage reduction structure.

[0045] The above embodiments enable the electric winch to switch between high and low speeds under different working conditions, accommodating both rapid rope release and powerful rope reeling. Furthermore, the mechanical handle adjustment replaces the electronic control switching, resulting in a simpler and more reliable structure, making it particularly suitable for applications requiring high reliability, such as field and off-road rescue.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electric winch, comprising a motor (1), a drum (2), a drive shaft (3), and a transmission module (4), wherein the motor (1) drives the drive shaft (3) disposed inside the drum (2) to rotate, and the drive shaft (3) drives the drum (2) to rotate via the transmission module (4), characterized in that, The transmission module (4) includes a gearbox housing (41) and a gearbox bracket (42), which together form an internal mounting cavity. The mounting cavity is provided with a first-stage reduction assembly (5), a second-stage reduction assembly (6) and a third-stage reduction assembly (7) in sequence from the side away from the roller (2) to the side closer to the roller (2). The second-stage reduction assembly (6) includes a second-stage annular internal gear ring (61) and a second-stage planetary gear set (62) meshing with it. The gearbox housing (41) is provided with a fixing ring (65) for switching working states. The fixing ring (65) has an external tooth structure. When the secondary annular internal gear ring (61) slides toward the primary reduction assembly (5), it meshes with the external tooth structure of the fixed ring (65) and remains stationary relative to the gearbox housing (41). The planetary gears of the secondary planetary gear set (62) rotate within the secondary annular internal gear ring (61), forming a low-speed, high-torque transmission state. When the secondary annular internal gear ring (61) slides away from the primary reduction assembly (5) and disengages from the meshing of the external tooth structure of the fixed ring (65), the secondary planetary gear set (62) rotates synchronously with the secondary annular internal gear ring (61) to form a high-speed, low-torque transmission state.

2. An electrically powered winch according to claim 1, characterised in that The first-stage reduction assembly (5) includes a first-stage annular internal gear ring (51), a first-stage planetary gear set (52) meshing with it, and a first ring disk (53). The first ring disk (53) is pivotally connected to the center of multiple planetary gears of the first-stage planetary gear set (52) through multiple pivot shafts. The sun gear of the first-stage planetary gear set (52) is fixedly connected to the end of the drive shaft (3) and rotates synchronously with it. The first ring disk (53) is sleeved on the outside of the sun gear of the second-stage planetary gear set (62) to drive the sun gear to rotate.

3. An electrically powered winch according to claim 1, wherein, The secondary reduction assembly (6) further includes a second ring disk (63) with an external tooth structure, the second ring disk (63) being pivotally connected to the centers of multiple planetary gears of the secondary planetary gear set (62) via multiple pivot shafts; When the secondary annular internal gear ring (61) is engaged with the fixed ring (65) and stationary, the secondary annular internal gear ring (61) disengages from the second annular disk (63), and the sun gear of the secondary planetary gear set (62) rotates, causing multiple planetary gears to rotate within the secondary annular internal gear ring (61). When the secondary annular internal gear ring (61) disengages from the external gear structure of the fixed ring (65), the secondary annular internal gear ring (61) meshes with the external gear structure of the second ring disk (63), and the secondary planetary internal gear ring and the secondary planetary gear set rotate synchronously as a whole.

4. An electrically powered winch according to claim 3, wherein, The three-stage reduction assembly (7) includes a three-stage annular internal gear ring (71), a three-stage planetary gear set (72) meshing with it, and a third ring disk (73). The third ring disk (73) is pivotally connected to the center of multiple planetary gears of the three-stage planetary gear set (72) through multiple pivot shafts, and the third ring disk (73) is fixedly connected or driven to the roller (2). The sun gear of the three-stage planetary gear set (72) meshes with the inner ring of the second ring disk (63), thereby driving the three-stage planetary gear set (72) to rotate through the rotation of the second ring disk (63), which in turn drives the roller (2) to rotate.

5. An electric winch according to claim 3, wherein The outer side of the secondary annular internal gear ring (61) is provided with an annular groove (611). The gearbox housing (41) is provided with a rotatable drive handle (642). One end of the drive handle (642) is provided with an eccentric shaft (641). The eccentric shaft (641) passes through the mounting hole (412) of the gearbox housing (41) and extends into the annular groove (611). Rotating the drive handle (642) allows the eccentric shaft (641) to drive the secondary annular internal gear ring (61) to slide axially, thereby switching between different transmission states.

6. An electric winch according to claim 5, characterised in that The gearbox housing (41) has a mounting portion (411) extending radially outward, and the mounting hole (412) penetrates the mounting portion (411); the drive handle (642) is provided with a limiting notch (6421), and a limiting shaft (643) is fixedly provided on the side wall of the mounting portion (411). The limiting shaft (643) extends into the limiting notch (6421) to prevent the drive handle (642) from dislodging and to limit its rotation angle, thereby controlling the axial movement range of the secondary annular internal gear ring (61).

7. An electrically powered winch according to claim 6, wherein The drive handle (642) has an L-shaped structure.

8. An electric winch according to claim 4, wherein A drive ring (74) is fixedly installed inside the gearbox bracket (42). The drive ring (74) has an external tooth structure, and the three-stage annular internal gear ring (71) meshes with the external tooth structure of the drive ring (74).

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