An electric winch with improved release speed of the pulling element

Abstract

The application provides an electric winch for improving release speed of a pulling element, comprising an actuator (5), a transmission and brake device (4) in transmission connection with the actuator (5), a transmission shaft (3) in one end connection with the transmission and brake device (4), a variable speed assembly (1) comprising a power input element and a power output element, the other end of the transmission shaft (3) in interaction with the power input element, and a drum (2) in connection with the power output element of the variable speed assembly (1), wherein the pulling element is wound on the drum (2), wherein the electric winch is configured to be combined with the power input element at the other end of the transmission shaft (3) when the pulling element is tightened, and to be disengaged from the power input element at the other end of the transmission shaft (3) when the pulling element is released under no load. The electric winch can automatically switch different working conditions of no-load rope release and load operation without manual intervention, effectively reducing the working intensity.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of driving or pulling apparatuses, in particular to an electric winch for improving the release speed of a pulling element. BACKGROUND

[0002] An electric winch is a machine tool driven by a motor to wind a flexible member (steel wire rope, chain, etc.) to complete a pulling operation, where the flexible member serves as a pulling element to achieve the pulling operation. Electric winches are commonly used in fields such as handling work, ship wharfs, vehicle pulling, fire rescue, etc.

[0003] To achieve the best cost performance, the existing electric winch usually has a relatively large transmission of the speed reduction mechanism. When using the winch, the rope needs to be released from the drum, i.e. the rope is unwound. At this time, the motor rotates to drive the drum to rotate through the speed reduction mechanism. However, due to the relatively large transmission of the speed reduction mechanism, the drum rotates at a low speed, and the release speed of the rope is much lower than the walking speed of the user. Therefore, in order to improve the use efficiency and the response speed under certain working conditions, the drum is separated from the motor during the unwinding of the rope, and the user pulls the rope to achieve the unwinding operation. At this time, the walking speed of the user determines the unwinding speed. When winding the rope or under load working conditions, the drum is reliably engaged with the motor to drive the drum to rotate through the motor, thereby safely and reliably completing the winch operation. In the existing electric winch, the sprocket is released by manual or automatic means to make the speed reduction mechanism idle, thereby separating the motor from the drum to achieve fast unwinding of the rope. When winding the rope or under load working conditions, the sprocket needs to be manually or remotely locked to make the speed reduction mechanism work normally, so that the motor can drive the drum to rotate.

[0004] Therefore, it can be seen that the existing electric winch needs manual intervention to separate the drum from the motor for fast unwinding of the rope, and then the electric winch needs to be operated to combine them when the electric winch needs to work normally. Therefore, the operation is complicated, which affects the working efficiency and increases the labor intensity. SUMMARY

[0005] The present application aims to at least partially overcome the defects of the prior art and provide an electric winch for improving the release speed of a pulling element.

[0006] The present application also aims to provide an electric winch for improving the release speed of a pulling element, which can automatically increase the unwinding speed of the rope without manual intervention.

[0007] The present application also aims to provide an electric winch for improving the release speed of a pulling element, which can improve the working efficiency and reduce the labor intensity.

[0008] To achieve the above-mentioned purpose or one of the purposes, the technical solution of the present application is as follows:

[0009] An electric winch for improving the release speed of a pulling element, the electric winch comprising:

[0010] an actuator;

[0011] a transmission and braking device, in transmission connection with the actuator, for transmitting the driving force of the actuator and capable of achieving braking under predetermined conditions;

[0012] a transmission shaft, one end of the transmission shaft being connected with the transmission and braking device;

[0013] a transmission assembly, comprising a power input element and a power output element, the other end of the transmission shaft being in interaction with the power input element; and

[0014] a drum, the drum being connected with the power output element of the transmission assembly, the pulling element being wound on the drum,

[0015] wherein the electric winch is configured such that the other end of the transmission shaft is combined with the power input element when the pulling element is being tightened, and the other end of the transmission shaft is disengaged from the power input element when the pulling element is being released under no load.

[0016] According to a preferred embodiment of the present application, the electric winch further comprises:

[0017] a transmission disc, fixedly arranged on the other end of the transmission shaft; and

[0018] a plurality of locking blocks, hinged on the transmission disc and configured to be able to extend or retract relative to the center of the transmission disc,

[0019] wherein the power input element is provided with a plurality of grooves, and the power input element is configured such that the locking blocks are able to extend into the grooves to make the transmission disc and the power input element rotate simultaneously in the state of extending relative to the center of the transmission disc, and not extend into the grooves to make the transmission disc and the power input element rotate asynchronously in the state of retracting relative to the center of the transmission disc.

[0020] According to a preferred embodiment of the present application, the power input element comprises:

[0021] a central hole, arranged in the center of the power input element, for the transmission shaft to pass through; and

[0022] an inner recess, the inner recess being a substantially disc-shaped groove, located in the end face of the power input element facing the transmission disc, the transmission disc being at least partially accommodated in the inner recess,

[0023] wherein a plurality of bosses are formed on the outer circumferential surface of the disc-shaped groove of the inner recess, and the grooves are formed between adjacent bosses to form a structure in which the bosses and the grooves are staggered.

[0024] According to a preferred embodiment of the present application, the plurality of locking blocks are strip-shaped, one end of each of the plurality of locking blocks is hingedly connected to a side of the transmission disc near the outer periphery, and the other end of each of the plurality of locking blocks is a free end that can extend or retract relative to the center of the transmission disc.

[0025] According to a preferred embodiment of the present application, the plurality of locking blocks are circumferentially symmetrically distributed relative to the center of the transmission disc.

[0026] According to a preferred embodiment of the present application, the number of locking blocks is three.

[0027] According to a preferred embodiment of the present application, a plurality of recessed spaces are provided in the side of the transmission disc, and the locking blocks are arranged in the recessed spaces.

[0028] According to a preferred embodiment of the present application, the electric winch further comprises a housing that surrounds the transmission assembly and supports the transmission assembly.

[0029] According to a preferred embodiment of the present application, the electric winch further comprises a restraining element arranged on an inner end surface of the housing, the restraining element comprising:

[0030] a base that is in contact with the inner end surface of the housing and can rotate relative to the inner end surface; and

[0031] a peripheral edge extending from the outer periphery of the base towards the power input element, forming an accommodation space, the peripheral edge being provided with a plurality of teeth and a plurality of tooth grooves,

[0032] wherein the transmission disc is at least partially located in the accommodation space, and the other end of the locking block is always located in the tooth groove;

[0033] the locking block is shaped to be able to extend or retract relative to the center of the transmission disc under the action of the restraining element.

[0034] According to a preferred embodiment of the present application, the restraining element extends into the inner recess, and the outer diameter of the peripheral edge of the restraining element is smaller than the inner diameter of the boss of the inner recess.

[0035] According to a preferred embodiment of the present application, the housing is composed of an end cover and a shell.

[0036] According to a preferred embodiment of the present application, the transmission assembly comprises a first-stage planetary gear set, a second-stage planetary gear set, and a third-stage planetary gear set;

[0037] The first-stage planetary gear set comprises a first-stage sun gear, a first-stage ring gear, a first-stage carrier and a plurality of first-stage planet gears; the second-stage planetary gear set comprises a second-stage sun gear, a second-stage ring gear, a second-stage carrier and a plurality of second-stage planet gears; the third-stage planetary gear set comprises a third-stage sun gear, a third-stage ring gear, a third-stage carrier and a plurality of third-stage planet gears; the first-stage ring gear, the second-stage ring gear and the third-stage ring gear are fixedly connected with the housing;

[0038] In terms of transmission, the first-stage carrier of the first-stage planetary gear set is connected with the second-stage sun gear of the second-stage planetary gear set, the second-stage carrier of the second-stage planetary gear set is connected with the third-stage sun gear of the third-stage planetary gear set, and the third-stage carrier of the third-stage planetary gear set is connected with the drum;

[0039] The first-stage sun gear serves as the power input element, and the third-stage carrier serves as the power output element.

[0040] The electric winch can automatically switch different working conditions of idle rope releasing and load working without manual intervention, effectively reduces the working strength, and improves the working efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 A schematic view of an electric winch according to an embodiment of the present application for improving the release speed of a pulling element;

[0042] Figure 2 A partial perspective view of an electric winch according to an embodiment of the present application for improving the release speed of a pulling element;

[0043] Figure 3 A schematic view of a power input element (first-stage sun gear) according to an embodiment of the present application. DETAILED DESCRIPTION

[0044] Exemplary embodiments of the present application are described in detail below with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals. In addition, in the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. However, it will be apparent to one of ordinary skill in the art that one or more embodiments can be practiced without these specific details. In other instances, well-known structures and devices are illustrated in block diagram form to avoid obscuring the accompanying drawings.

[0045] The present application provides an electric winch capable of improving the releasing speed of the pulling element, and in particular, it can improve the releasing speed by keeping the transmission of the transmission mechanism when the electric winch is working under load, thus ensuring the normal operation of the electric winch, and disconnecting the transmission mechanism when the electric winch is working under no load, i.e. the rotation of the drum is decoupled from the actuator (e.g. motor), thus the drum can rotate freely instead of being driven by the motor, thus the rotation and releasing speed can be improved. It should be noted that if the rotation of the drum is not decoupled from the motor, the releasing speed will be very slow due to the speed reduction of the motor through the speed change assembly (reduction mechanism), while the electric winch of the present application is not like this.

[0046] The electric winch comprises an actuator 5, a transmission and braking device 4, a transmission shaft 3, a speed change assembly 1, a drum 2, an end cover 6 and a housing 7. The actuator 5, usually in the form of a motor, is the power source for the electric winch to realize traction. The transmission and braking device 4 is in transmission connection with the actuator 5, and is used to transmit the driving force of the actuator 5 and can realize braking under predetermined conditions, such as emergency braking. One end of the transmission shaft 3 is connected with the transmission and braking device 4. The speed change assembly 1 comprises a power input element and a power output element, and is used to realize speed change, mainly for speed reduction, also known as reduction mechanism. The other end of the transmission shaft 3 interacts with the power input element. The drum 2 is connected with the power output element of the speed change assembly 1, and the pulling element is wound on the drum 2. Most of the transmission shaft 3 is located inside the drum 2. The end cover 6 and the housing 7 constitute the shell of the electric winch, which surrounds the outside of the speed change assembly 1 and supports the speed change assembly 1.

[0047] In a specific embodiment of the present application, the speed change assembly 1 is designed to comprise three-stage planetary gear sets, including a first-stage planetary gear set, a second-stage planetary gear set and a third-stage planetary gear set. The first-stage planetary gear set comprises a first-stage sun gear 101, a first-stage ring gear, a first-stage carrier and a plurality of first-stage planet gears. The second-stage planetary gear set comprises a second-stage sun gear, a second-stage ring gear, a second-stage carrier and a plurality of second-stage planet gears. The third-stage planetary gear set comprises a third-stage sun gear, a third-stage ring gear, a third-stage carrier and a plurality of third-stage planet gears. The first-stage ring gear, the second-stage ring gear and the third-stage ring gear are all fixedly connected with the housing. In terms of transmission, the first-stage carrier of the first-stage planetary gear set is connected with the second-stage sun gear of the second-stage planetary gear set, the second-stage carrier of the second-stage planetary gear set is connected with the third-stage sun gear of the third-stage planetary gear set, and the third-stage carrier of the third-stage planetary gear set is connected with the drum 2. Here, the first-stage sun gear 101 serves as the power input element, and the third-stage carrier serves as the power output element.

[0048] In this way, the rotation of the actuator 5 is transmitted to the drum 2 through three-stage transmission and three-stage speed reduction.

[0049] To achieve the objectives of this invention, the electric winch is configured such that when the pulling element is tightened, the other end of the drive shaft 3 engages with the power input element, and when the pulling element is released under no-load conditions, the other end of the drive shaft 3 disengages from the power input element. Specifically, a drive disc 10, multiple locking blocks 9, and restraining elements 8 are added to the electric winch; see [link to relevant documentation]. Figure 2 , Figure 2 The interior of end cover 6 is shown. Here, only the first-stage sun gear 101 and the ring gear (located inside end cover 6) of the first-stage planetary gear set are shown in the three-stage planetary gear set. Other components of the first-stage planetary gear set, as well as the second and third-stage planetary gear sets, are not shown. The housing 7 and the roller 2 are also shown. Figure 2 The middle part is also omitted. As shown in the figure, the transmission disk 10 is fixedly mounted on the other end of the transmission shaft 3. A plurality of locking blocks 9 are hinged to the transmission disk 10 and configured to extend or retract relative to the center of the transmission disk 10. Preferably, the plurality of locking blocks 9 are elongated, with one end of each locking block 9 hinged to the side of the transmission disk 10 near its outer periphery, and the other end of each locking block 9 serving as a free end, allowing it to extend or retract relative to the center of the transmission disk 10. The plurality of locking blocks 9 are symmetrically distributed relative to the central circumference of the transmission disk 10. Advantageously, the number of locking blocks 9 is three. Figure 2 As shown, the transmission disc 10 has multiple recessed spaces on its side, and the locking block 9 is disposed in the recessed space. Each recessed space is equipped with a locking block 9 arranged approximately tangentially.

[0050] Here, the first-stage sun gear 101 is mounted on the drive shaft 3, but the first-stage sun gear 101 is not fixedly connected to the drive shaft 3; it can rotate around and relative to the drive shaft 3. The first-stage sun gear 101 consists of a disc and a sun gear. The first-stage sun gear 101 includes a central hole located at its center for the drive shaft 3 to pass through. The central hole passes through the center of the disc and the sun gear. The first-stage sun gear 101 is positioned and supported by multiple first-stage planetary gears.

[0051] See Figure 3 The power input element (first-stage sun gear 101) has multiple grooves, and the power input element is configured such that the locking block 9, when extended outward relative to the center of the transmission disk 10, can extend into the grooves to allow the transmission disk 10 and the power input element to rotate simultaneously, and when retracted inward relative to the center of the transmission disk 10, it does not extend into the grooves, thus allowing the transmission disk 10 and the power input element to rotate asynchronously. Furthermore, the power input element also includes a recessed portion, which is a roughly disc-shaped groove located on the end face of the power input element facing the transmission disk 10, such as... Figure 3As shown, the transmission disk 10 is at least partially housed in the recess, wherein a plurality of bosses are formed on the outer peripheral surface of the disc-shaped groove of the recess, and the grooves are formed between adjacent bosses to form a structure in which bosses and grooves intersect.

[0052] like Figure 2 As shown, the constraint element 8 is disposed on the inner end face of the housing (end cover 6). The constraint element 8 includes: a base that contacts the inner end face of the housing and is rotatable relative to the inner end face; and a periphery extending from the outer periphery of the base toward the power input element, forming a receiving space, wherein the periphery is provided with a plurality of teeth and a plurality of tooth grooves (see...). Figure 2 In this configuration, the transmission disk 10 is located within the receiving space, and the other end of the locking block 9 is always located in the tooth groove. The teeth on the periphery of the constraint element 8 engage the locking block 9 like chucks. The shape of the locking block 9 is adapted to extend or retract relative to the center of the transmission disk 10 under the action of the constraint element 8. The locking block 9 is a bent elongated strip, and the other end of the locking block 9 extends out of the circumferential surface of the transmission disk 10. The constraint element 8 is mounted on the inner end face of the end cover 6, and the back of the constraint element 8 contacts the inner surface of the end cover 6, or a friction pad is installed between them. The constraint element 8 and the end cover 6 can rotate relative to each other. The constraint element 8 can be supported on the end cover 6 by a structure of shaft and shaft hole. For example, the end cover 6 is provided with a shaft hole, and a shaft extends out from the outer side of the base of the constraint element 8, which extends into the shaft hole; or the end cover 6 is provided with a shaft, and the constraint element 8 is provided with a shaft hole.

[0053] The groove width of the toothed groove on the constraint element 8 is greater than the end width of the locking block 9. The inner diameter of the constraint element 8 is close to the outer diameter of the transmission disk 10. That is, the ends of the locking blocks 9 extending out of the transmission disk 10 are respectively inserted into the toothed groove of the constraint element 8. When the locking block 9 is in contact with the transmission disk 10 (i.e., the locking block 9 retracts), the maximum diameter of the locking block 9 is smaller than the outer diameter of the constraint element 8, but larger than the inner diameter of the periphery of the constraint element 8. Therefore, the locking block 9 is stuck in the toothed groove and will not fall completely into the receiving space.

[0054] It should be noted that the constraint element 8 extends into the recessed portion, and the outer diameter of the periphery of the constraint element 8 is smaller than the inner diameter of the boss in the recessed portion. The constraint element 8 and the first-stage sun gear 102 are arranged concentrically and coaxially, meaning that the constraint element 8 does not contact the first-stage sun gear 102. Furthermore, the width of the groove between the bosses in the recessed portion is greater than the width of the protruding end of the locking block 9.

[0055] The working process of the electric winch with improved release speed of the traction element according to the present invention is described below:

[0056] When it is necessary to release the rope under no-load conditions, the user directly pulls the rope, causing the drum 2 to rotate, which in turn drives the gear transmission assembly 1 to rotate until the power input element of the gear transmission assembly 1 rotates, that is, the first-stage sun gear 101 rotates, making it rotate clockwise (see attached image). Figure 2 (Observed from the direction of the end cover), at this time, the locking block 9 is in the retracted position, closely attached to the transmission disc 10. The outermost end of the locking block 9 retracts into the tooth groove of the constraint element 8, not contacting the boss portion of the first-stage sun gear 101. The first-stage sun gear 101 can rotate freely, meaning that when the user pulls the rope to release it, only the frictional torque of the transmission assembly 1 needs to be overcome. To achieve the locking block 9 being close to the transmission disc 10, the actuator 5 can be activated to drive the transmission shaft 3 to rotate clockwise (see attached image). Figure 2 (Observed from the direction of the end cover), at this time, the outer end of the locking block 9 rotates around the hinge point and sticks to the transmission disc 10 under the resistance of the constraint element 8.

[0057] When actuator 5 operates to pull the rope, it drives transmission shaft 3 to rotate counterclockwise via transmission and braking device 4 (see attached image). Figure 2 When viewed from the direction of the end cover, the transmission disc 10 reverses, and the outer end of the locking block 9 is stuck in the tooth groove of the constraint element 8. The back of the constraint element 8 has resistance when it contacts the end cover 6. Therefore, when the transmission disc 10 reverses, the outer end of the locking block 9 is subjected to resistance and rotates around the hinge point between the locking block 9 and the transmission disc 10. That is, the outer end of the locking block 9 moves outward and inserts into the groove between the boss of the first-stage sun gear 101. Therefore, the locking block 9 is stuck between the transmission disc 10 and the first-stage sun gear 101. The transmission disc 10 drives the first-stage sun gear 101 to rotate, thereby driving the roller 2 to rotate and retract the rope.

[0058] The electric winch of this invention can automatically switch between different working conditions, such as no-load rope release and loaded operation, without manual intervention, effectively reducing workload and improving work efficiency.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents.

[0060] List of reference numerals in the attached diagram:

[0061] 1. Transmission assembly

[0062] 2 rollers

[0063] 3 Drive shaft

[0064] 4. Transmission and braking devices

[0065] 5 Actuators

[0066] 6 End Caps

[0067] 7 housing

[0068] 8 restraining element

[0069] 9 locking block

[0070] 10 transmission disc

[0071] 101 first-stage sun gear

Claims

1. An electric winch for improving the release speed of a pulling element, said pulling element being a rope, said electric winch being capable of automatically increasing the rope release speed when the rope is being released, characterized in that, The electric winch comprises: an actuator (5); a transmission and braking device (4) in transmission connection with the actuator (5) for transmitting the driving force of the actuator (5) and capable of achieving braking under predetermined conditions; a transmission shaft (3), one end of the transmission shaft (3) being connected with the transmission and braking device (4); a transmission assembly (1) comprising a power input element and a power output element, the other end of the transmission shaft (3) interacting with the power input element; and a drum (2), the drum (2) being connected with the power output element of the transmission assembly (1), the pulling element being wound on the drum (2), wherein the electric winch is configured such that the other end of the transmission shaft (3) is combined with the power input element when the pulling element is tightened, and the other end of the transmission shaft (3) is disengaged from the power input element when the pulling element is released under no load; The electric winch further comprises: a transmission disc (10) fixedly arranged on the other end of the transmission shaft (3); and a plurality of lock blocks (9) hinged on the transmission disc (10) and configured to be able to extend outward or retract relative to the center of the transmission disc (10), wherein the power input element is provided with a plurality of grooves, and the power input element is configured such that the lock blocks (9) can extend into the grooves to rotate the transmission disc (10) and the power input element simultaneously in the state of extending outward relative to the center of the transmission disc (10), and do not extend into the grooves to rotate the transmission disc (10) and the power input element asynchronously in the state of retracting inward relative to the center of the transmission disc (10); The power input element comprises: a central hole arranged in the center of the power input element for the transmission shaft (3) to pass through; and an inner recess, which is a substantially disc-shaped groove, located in the end face of the power input element facing the transmission disc (10), the transmission disc (10) being at least partially accommodated in the inner recess, wherein a plurality of bosses are formed on the outer circumferential surface of the disc-shaped groove of the inner recess, and the grooves are formed between adjacent bosses to form a structure in which the bosses and the grooves are staggered; The plurality of lock blocks (9) are in the shape of long strips, one end of each of the plurality of lock blocks (9) is hinged at a position near the outer periphery of the side face of the transmission disc (10), and the other end of each of the plurality of lock blocks (9) is a free end capable of extending outward or retracting relative to the center of the transmission disc (10); A plurality of recessed spaces are arranged in the side face of the transmission disc (10), and the lock blocks (9) are arranged in the recessed spaces; The electric winch further comprises a housing; The electric winch further comprises a constraint element (8) arranged on the inner end face of the housing, the constraint element (8) comprising: a base in contact with the inner end face of the housing and capable of rotating relative to the inner end face; and a peripheral edge extending from the outer periphery of the base towards the power input element to form an accommodation space, the peripheral edge being provided with a plurality of teeth and a plurality of tooth grooves, wherein the transmission disc (10) is at least partially located in the accommodation space, and the other end of the lock block (9) is always located in the tooth groove; The shape of the lock block (9) is suitable for extending or retracting relative to the center of the transmission disc (10) under the action of the constraint element (8); The constraint element (8) extends into the inner recess, and the outer diameter of the periphery of the constraint element (8) is smaller than the inner diameter of the boss of the inner recess.

2. The electric winch for improving the release speed of the pulling element according to claim 1, characterized in that: The shell is wrapped outside the transmission assembly (1) and supports the transmission assembly (1).

3. The electric winch for improving the release speed of the pulling element according to claim 2, characterized in that: The shell is composed of an end cover (6) and a shell body (7).

4. The electric winch for improving the release speed of the pulling element according to any one of claims 2-3, characterized in that: The transmission assembly (1) comprises a first-stage planetary gear set, a second-stage planetary gear set and a third-stage planetary gear set; The first-stage planetary gear set comprises a first-stage sun gear (101), a first-stage ring gear, a first-stage carrier and a plurality of first-stage planet gears; the second-stage planetary gear set comprises a second-stage sun gear, a second-stage ring gear, a second-stage carrier and a plurality of second-stage planet gears; the third-stage planetary gear set comprises a third-stage sun gear, a third-stage ring gear, a third-stage carrier and a plurality of third-stage planet gears; the first-stage ring gear, the second-stage ring gear and the third-stage ring gear are fixedly connected with the shell; In terms of transmission, the first-stage carrier of the first-stage planetary gear set is connected with the second-stage sun gear of the second-stage planetary gear set, the second-stage carrier of the second-stage planetary gear set is connected with the third-stage sun gear of the third-stage planetary gear set, and the third-stage carrier of the third-stage planetary gear set is connected with the drum (2); The first-stage sun gear (101) serves as the power input element, and the third-stage carrier serves as the power output element.

Images