Autonomous clutch electric capstan

Abstract

The utility model provides an electric capstan capable of automatically clutching. The electric capstan capable of automatically clutching can achieve automatic clutching of a roller. By installing the contact clutch in the transmission unit of the electric capstan, the engagement and disengagement of the roller and the actuating device at the position of the contact clutch are autonomously realized, so that the rope releasing speed can be autonomously controlled by a user when part of needs are needed, and when the roller needs to be engaged, the roller can be immediately engaged through the work of the motor.

Description

Technical Field

[0001] This utility model relates to the field of transmission or traction equipment, specifically an electric winch with autonomous clutch. Background Technology

[0002] Electric winches are powered by a motor, using a large transmission ratio to achieve sufficient speed reduction and torque increase, enabling them to lift or pull heavy objects. However, due to the large transmission ratio, the winch releases the rope slowly, resulting in lower work efficiency. Summary of the Invention

[0003] The purpose of this invention is to at least partially overcome the defects of the prior art and provide an electric winch that can freely release the rope while meeting the work requirements. When actively pulling the rope to release it, the drum separates from the actuation device, autonomously controlling the rope release speed. When retracting the rope, the drum reliably engages, effectively improving work efficiency.

[0004] To achieve the above-mentioned objectives or one of them, the technical solution of this utility model is as follows:

[0005] An electric winch with autonomous clutch, characterized in that: the electric winch includes a speed change unit, a power transmission unit, and a contact clutch; the speed change unit includes a speed input element and a speed output element; the power transmission unit includes a power input component and a power output component; the contact clutch is disposed in the power transmission unit, connecting the power input component and the power output component of the power transmission unit; the contact clutch is configured to disengage the power output component from the power input component, and to engage the power output component with the power input component when the power input component rotates actively; the power transmission unit includes the connection of the actuation element to the speed input component of the speed change unit, the connection of the speed output component of the speed change unit to the speed input component of the next-level speed change unit, and the connection of the speed output component of the speed change unit to the drum of the winch.

[0006] Specifically, the power transmission unit refers to the connection of power components in the winch other than the speed change unit, including the connection between the actuator and the speed change input element of the first-stage speed change unit, the connection between the speed change output element of the first-stage speed change unit and the speed change input element of the second-stage speed change unit, the connection between the speed change output element of the second-stage speed change unit and the speed change input element of the third-stage speed change unit, etc., that is, the connection between the speed change output element of the previous-stage speed change unit and the speed change input element of the next-stage speed change unit, and the connection between the speed change output element of the last-stage speed change unit and the drum.

[0007] According to a preferred embodiment of the present invention, it further includes a fixing member; the contact clutch includes a control bracket and a locking block; the control bracket is frictionally connected to the fixing member, and the locking block includes a near-center end and a far-center end; the control bracket has a groove, and the far-center end of the locking block passes through the groove and can rotate around the near-center end of the locking block; the locking block is configured to simultaneously contact the power input member and the power output member when rotated to a first position, and the contact clutch is engaged; when rotated to a second position, it does not contact the power output member or the power input member, and the contact clutch is disengaged.

[0008] According to a preferred embodiment of the present invention, the speed change unit is a planetary gear mechanism, including a sun gear, a ring gear, and a planet carrier; the speed change input element is the sun gear, and the speed change output element is the planet carrier or the ring gear.

[0009] According to a preferred embodiment of the present invention, the contact clutch includes a locking block and a return spring; the return spring causes the locking block to tend to move inward toward the power input member; the locking block is configured to simultaneously contact the power input member and the power output member when in the outer position, and the contact clutch is engaged; when in the inner position, it does not contact the power output member or the power input member, and the contact clutch is disengaged.

[0010] According to a preferred embodiment of the present invention, the fixing member includes a housing of the winch that is fixedly installed, and parts that are directly or indirectly fixedly connected to the housing.

[0011] According to a preferred embodiment of the present invention, the contact surface between the locking block and the power input component includes an inclined surface A and a curved surface B. The angle between the line connecting the two ends of the outer circular arc of the locking block and the inclined surface A is an obtuse angle. The curved surface B is one of the following: a plane, a sphere, a cylinder, a parabola, a hyperboloid, or a combination of the above.

[0012] The winch of this invention has the following advantages:

[0013] The system allows for switching between free and controlled rope release as needed: When rapid rope release is required, the clutch disengages, allowing the drum to rotate freely and the user to control the release speed. When controlled rope release is required, the clutch engages, enabling controlled rope release under load. During rope winding, the clutch automatically engages, allowing the winch to wind up the rope normally. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an embodiment of the self-clutching electric winch of this utility model;

[0015] Figure 2This is a schematic diagram of the contact clutch structure installation in Example 1;

[0016] Figure 3 This is an axial schematic diagram of the clutch disengagement in Example 1;

[0017] Figure 4 This is an axial schematic diagram of the contact clutch engagement in Embodiment 1;

[0018] Figure 5 This is a schematic diagram of Embodiment 2 for the contact clutch;

[0019] Figure 6 This is a schematic diagram of Embodiment 3 for the engagement clutch;

[0020] Figure 7 This is a schematic diagram of another embodiment of the locking block in the contact clutch. Detailed Implementation

[0021] Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements. Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the drawings.

[0022] Figure 1-4 This is an embodiment of an electric winch with an autonomous clutch, utilizing the present invention. The electric winch includes a motor 700, a transmission and braking assembly 800, a drum assembly 500, an actuator 001 connected to the motor 700 via the transmission and braking assembly 800, a fixedly mounted fixing member 400, and a housing 410 fixedly mounted to the fixing member 400. The fixing member 400 and the housing 410 contain a gear transmission mechanism and a contact clutch. The gear transmission mechanism includes the following transmission units: a first-stage planetary gear mechanism 100, a second-stage planetary gear mechanism 200, and a third-stage planetary gear mechanism 300. The power transmission unit includes the connection between the actuator 001 and the transmission unit, the connection between the upper-level transmission unit and the lower-level transmission unit, and the connection between the transmission unit and the drum assembly 500, etc., and is divided into a power input unit and a power output unit according to the direction of power transmission. In this embodiment, the contact clutch 600 is disposed in the power transmission unit that connects the third-stage planetary gear mechanism 300 and the roller assembly 500. The planet carrier assembly 310 of the third-stage planetary gear mechanism 300 is the speed output element of the speed change unit and the power input element in this power transmission unit. The roller assembly 500 is the power output element in this power transmission unit.

[0023] Figure 2The diagram shows the structure and installation of the contact clutch in Embodiment 1. The planetary carrier assembly 310, the speed-changing output element of the third-stage planetary gear mechanism 300, is connected to the roller assembly 500 as a power transmission unit. The planetary carrier assembly 310 is the power input component, and the outer ring 640, fixedly installed with the roller assembly 500, is the power output component. The inner element 610 of the contact clutch 600 is fixedly installed with the planetary carrier assembly 310, the control bracket 620 is frictionally mounted with the fixing member 400, and the outer ring 640 is fixedly installed with the roller assembly 500. The inner element 610 has a groove 611 containing a partially circular hole. The near-center end of the locking block 630 includes a cylindrical surface, which mates with the partially circular hole in the groove 611. The far-center end of the locking block 630 extends beyond the outer surface of the inner element 610 and inserts into the groove of the control bracket 620. The inner surface of the outer ring 640 has a groove that matches the protruding end of the locking block 630. The control bracket 620 includes a recessed portion with an outer diameter smaller than the minimum inner diameter of the outer ring 640, and an inner diameter larger than the outer diameter of the inner element 610. The locking block 630 is rotatable about its cylindrical mounting end. Figure 3 The second position of the locking block 630 is shown, with its far-center end inserted into the groove of the control bracket 620, and its outer surface not exceeding the outer surface of the control bracket 620. The locking block 630 does not contact the power output component 640, but engages with the clutch 600 to disengage. Figure 4 The first position of the locking block 630 is shown. Compared with the second position, the far center end of the locking block 630 rotates clockwise around its cylindrical near center end, extends out of the groove of the control bracket 620, and inserts into the groove of the outer ring 640. At this time, the locking block simultaneously contacts the power input component 310 and the power output component 640, and engages the clutch 600.

[0024] Figure 5 The diagram shows a second embodiment where the contact clutch 600 is installed in another power transmission unit. The contact clutch 600 is located between the planet carrier 110, the speed output element of the first-stage planetary gear mechanism 100, and the sun gear 220, the speed input element of the second-stage planetary gear mechanism 200. The planet carrier 110 is the power input element, and the sun gear 220 is the power output element. The control bracket 620 is frictionally mounted to the fixed element, and the outer ring 640 is fixedly mounted to the sun gear 220. The specific structural principle is basically the same as that of the first embodiment, and will not be described in detail here.

[0025] Figure 6The diagram shows a third embodiment of the contact clutch. The contact clutch 600 is positioned between the planetary carrier assembly 310 and the roller assembly 500, which are the transmission output elements of the third-stage planetary gear mechanism 300. The planetary carrier assembly 310 serves as the power input, and the outer ring 640, fixedly connected to the roller assembly 500, serves as the power output. The inner element 610 of the contact clutch 600 is fixedly mounted to the planetary carrier assembly 310. The inner element 610 has a wedge-shaped groove for mounting a locking block 630. The wedge-shaped groove includes an inclined surface 612 and a curved surface 613, which respectively mate with the A and B surfaces of the locking block 630. An annular groove is also provided on the surface of the inner element 610 and the wedge-shaped locking block 630 facing the roller assembly 500 to mount an annular return spring 650. In this third embodiment, the B surface of the locking block 630 is flat. Figure 7 The B surface of the lock block 630 shown is an arc surface.

[0026] The following is in conjunction with the appendix Figure 1-4 The working process of the autonomous clutch electric winch of Embodiment 1 of this utility model is described as follows:

[0027] The motor 700 drives the actuator 001 to rotate through the transmission and braking assembly 800. The actuator 001 is connected to the sun gear 120 in the first-stage planetary gear mechanism 100, driving the sun gear 120 to rotate. The rotation is transmitted to the planet carrier 310 of the third-stage planetary gear mechanism 300 via three speed change units. The engagement and disengagement of the roller assembly 500 and the gear mechanism are autonomously controlled by the contact clutch 600.

[0028] When the roller assembly 500 needs to be separated, if the locking block 630 is not in the second position, the motor 700 reverses, driving the inner component 610 to rotate clockwise. Figure 3 (Looking at the direction), the cylindrical mounting end of the locking block 630 rotates clockwise together, while the outer ring 640 is fixedly connected to the roller assembly 500 and remains stationary. Due to the friction between the control bracket 620 and the fixing member 400, the control bracket 620 tends to remain stationary, and the far-center end of the locking block 630, inserted into the groove of the control bracket 620, also tends to remain stationary. Therefore, the locking block 630 rotates counterclockwise around its near-center end to the second position. At this time, the far-center end of the locking block 630 is located in the groove of the control bracket 620, and its end face does not extend beyond the outer surface of the control bracket 630, and it is not in contact with the outer ring 640 at all. The contact clutch 600 is disengaged, and the roller 900 can rotate freely without affecting the working state of the contact clutch 600.

[0029] When the roller assembly 500 needs to be engaged, the motor 700 rotates forward, driving the inner element 610 and the near-center end of the locking block 630 to rotate counterclockwise. Since the control bracket 620 tends to be stationary, the groove of the control bracket 620 causes the far-center end of the locking block 630 to tend to remain stationary. Therefore, the locking block 630 rotates clockwise around its support end, opening outward. When it rotates to the first position, the protruding end of the locking block 630 is inserted into the groove of the outer ring 640. Thus, the inner element 610 drives the outer ring 640 to rotate together through the locking block 630. That is, the roller assembly 500 and the gear mechanism are engaged through the contact clutch 600.

[0030] As the above analysis shows, when the drum needs to be separated, the motor 700 only needs to reverse briefly; when the electric winch needs to work to take in the rope, the motor 700 rotates forward, and the clutch 600 engages, thus achieving normal operation. When the electric winch needs to release the rope under load, that is, when there is a load on the drum assembly 500 and the motor 700 needs to reverse to release the rope, since the drum assembly 500 is always rotating clockwise under load, even if the motor 700 reverses, the clutch 600 can still maintain reliable engagement due to the load on the drum assembly 500, thus achieving the work process of releasing the rope under load.

[0031] Figure 5 In the second embodiment shown, the structural principle of the contact clutch 600 is the same as that in the first embodiment, only the installation position is different. Therefore, when the contact clutch 600 is disengaged or engaged, only the disengagement position of the roller assembly 500 and the motor 700 is different. The working process, working principle and working effect are the same, and will not be described in detail here.

[0032] Figure 6In the third embodiment shown, the contact clutch 600 causes the locking block 630 to tend to move inward via the return spring 650. When the wedge-shaped locking block 630 is located at the innermost position, its outer surface does not exceed the outer surface of the inner element 610 and does not contact the outer ring 640, thus disengaging the contact clutch 600. The mounting feature of the locking block 630 and the inner element 610 is wedge-shaped, and the angle formed between the endpoints of the arc-shaped outer surface of the locking block 630, i.e., the EF line, and the inclined plane A is an obtuse angle. When the motor 700 drives the planetary carrier 310 to rotate clockwise, the wedge-shaped locking block 630 moves outward under the action of centrifugal force, overcoming the force of the return spring 650, and contacts the outer ring 640. Due to the friction generated on the contact surface by the centrifugal force, the wedge-shaped locking block 630 tends to move towards its smaller end. The friction on the outer surface and the supporting force on the wedge-shaped groove support surface 613 work together to make the wedge-shaped locking block 630 stuck between the inner element 610 and the outer ring 640, and the clutch 600 engages. When the motor 700 drives the planetary carrier 310 to rotate counterclockwise, the friction on the outer surface of the wedge-shaped locking block 630 causes it to move towards its larger end, and contacts the inclined surface 612 of the wedge-shaped groove. The friction and the supporting force of the inclined surface 612 work together to make the wedge-shaped locking block 630 move inward, and the clutch 600 disengages. When the support surface 613 and the B surface of the locking block 630 are curved or combined curved surfaces, the working performance of the contact clutch 600 can be further optimized through reasonable structural design.

[0033] In other preferred embodiments of this utility model, the contact clutch 600 is disposed in the remaining power transmission unit.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric winch with autonomous clutch, characterized in that: The electric winch includes a speed change unit, a power transmission unit, and a contact clutch; the speed change unit includes a speed input element and a speed output element; the power transmission unit includes a power input component and a power output component; the contact clutch is disposed in the power transmission unit, connecting the power input component and the power output component of the power transmission unit; the contact clutch is configured to disengage the power output component from the power input component, and to engage the power output component with the power input component when the power input component rotates actively; the power transmission unit includes the connection between the speed output component of the speed change unit and the speed input component of the next-level speed change unit, and the connection between the speed output component of the speed change unit and the drum of the winch.

2. The self-clutching electric winch according to claim 1, characterized in that: It also includes a fixing member; the contact clutch includes a control bracket and a locking block; the control bracket is frictionally connected to the fixing member, and the locking block includes a near-center end and a far-center end; the control bracket has a groove, and the far-center end of the locking block passes through the groove and can rotate around the near-center end of the locking block; the locking block is configured to simultaneously contact the power input member and the power output member when rotated to a first position, and the contact clutch is engaged; when rotated to a second position, it does not contact the power output member or the power input member, and the contact clutch is disengaged.

3. The self-clutching electric winch according to claim 1, characterized in that: The contact clutch includes a locking block and a return spring; the return spring causes the locking block to tend to move inward toward the power input member; the locking block is configured to simultaneously contact the power input member and the power output member when in the outer position, and the contact clutch is engaged; and to disengage from the power output member or the power input member when in the inner position.

4. The self-clutching electric winch according to claim 2, characterized in that: The fastener includes the housing of the winch that is fixedly installed, and parts that are directly or indirectly fixedly connected to the housing.

5. The self-clutching electric winch according to claim 1, characterized in that: The speed change unit is a planetary gear mechanism, including a sun gear, a ring gear, and a planet carrier; the speed change input element is the sun gear, and the speed change output element is the planet carrier or the ring gear.

6. The self-clutching electric winch according to claim 3, characterized in that: The contact surface between the locking block and the power input component includes an inclined surface A and a curved surface B. The angle between the line connecting the two ends of the outer circular arc of the locking block and the inclined surface A is an obtuse angle. The curved surface B is one of the following: a plane, a sphere, a cylinder, a parabola, or a hyperboloid, or a combination of the above.

Images