An automatic transmission assembly and an electric winch having the same

Abstract

The application provides an automatic gear shifting assembly, comprising: a planetary gear reduction mechanism, comprising a first-stage planetary gear set and a power output element; an inner rotary driving element; an outer element, which is movably connected to the inner rotary driving element, so that the outer element can be driven to rotate under the driving of the inner rotary driving element, and the outer element is allowed to move axially between a first position and a second position relative to the inner rotary driving element; and a driving disc, which is movably connected to the outer element, so that the driving disc can be driven to rotate under the driving of the outer element, and the driving disc is configured to be capable of changing between a first state of being combined with the power output element and a second state of being disengaged from the power output element; the first-stage sun gear is configured to be disengaged from the outer element in the first position of the outer element and combined with the outer element in the second position of the outer element. The automatic gear shifting assembly and the electric winch with the automatic gear shifting assembly can realize the automatic gear shifting function and have good reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transmission or traction apparatuses, in particular to an automatic transmission assembly and an electric winch with the automatic transmission assembly. BACKGROUND

[0002] An electric winch is a machine tool driven by a motor to wind a drum and complete traction work of a flexible member (steel wire rope, chain, etc.). The electric winch is often used in the fields of handling work, ship wharf, automobile traction, fire rescue, etc.

[0003] Most of the existing electric winches do not have a transmission function, and a few electric winches with a transmission function need to be manually operated or remotely controlled to achieve the transmission effect. They are inconvenient to use and have poor reliability. SUMMARY

[0004] The present application aims to at least partially overcome the defects of the prior art and provide an automatic transmission assembly and an electric winch with the automatic transmission assembly.

[0005] The present application also aims to provide an automatic transmission assembly that can adaptively change the transmission ratio.

[0006] The present application also aims to provide an electric winch with an automatic transmission assembly that can automatically switch the transmission ratio, so that it works with a small transmission ratio when the load on the drum of the electric winch is small, and works with a large transmission ratio when the load on the drum is large.

[0007] To achieve the above-mentioned purpose or one of the purposes, the technical solution of the present application is as follows:

[0008] An automatic transmission assembly, comprising:

[0009] A planetary gear reduction mechanism, comprising a first-stage planetary gear set and a power output element, the first-stage planetary gear set comprising a first-stage sun gear, a first-stage ring gear, a first-stage carrier and a plurality of first-stage planet gears, the first-stage carrier being connected with the power output element;

[0010] An inner rotary drive member;

[0011] An outer element, sleeved on the inner rotary drive member, and the outer element is movably connected with the inner rotary drive member, so that the outer element can be driven to rotate under the driving of the inner rotary drive member, and the movable connection between the outer element and the inner rotary drive member allows the outer element to move axially along the longitudinal axis of the inner rotary drive member between a first position and a second position relative to the inner rotary drive member; and

[0012] a driving disc arranged along the longitudinal axis of the inner rotary driving member on one side of the outer element and movably connected with the outer element so that the driving disc can be driven to rotate under the driving of the outer element, and the driving disc is configured to be capable of changing between a first state of being combined with the power output element and a second state of being disengaged from the power output element,

[0013] wherein the first-stage sun gear is configured to be disengaged from the outer element at the first position of the outer element and combined with the outer element at the second position of the outer element.

[0014] According to one preferred embodiment of the present application, the inner rotary driving member comprises:

[0015] an input shaft configured to be capable of being connected with the actuating device for inputting the actuating force;

[0016] an inner element fixedly arranged on the input shaft.

[0017] According to one preferred embodiment of the present application, the input shaft and the inner element are an integral piece; or

[0018] the input shaft and the inner element are separate pieces, and the input shaft and the inner element are fixedly connected.

[0019] According to one preferred embodiment of the present application, the inner element comprises a central part and at least one protruding part protruding outward from the central part, and the outer element is provided with a central groove for accommodating the central part and a recessed part corresponding to the protruding part for accommodating the protruding part;

[0020] the size of the recessed part along the circumference of the outer element is greater than the size of the protruding part along the circumference of the inner element, so that the protruding part can be movably rotated around the axis of the inner element in the recessed part.

[0021] According to one preferred embodiment of the present application, the inner element comprises a plurality of protruding parts, which are uniformly distributed along the circumference of the inner element; and

[0022] the outer element comprises a plurality of recessed parts, which are uniformly distributed along the circumference of the outer element.

[0023] According to one preferred embodiment of the present application, the number of the protruding parts is 3, and the number of the recessed parts is 3.

[0024] According to one preferred embodiment of the present application, the end face of the protruding part towards the side of the first-stage planetary gear set comprises at least a first curved surface, and the surface of the recessed part towards the protruding part comprises at least a second curved surface, the first curved surface and the second curved surface are shape-matched, so that the movable rotation of the protruding part around the axis of the inner element in the recessed part can promote the axial movement of the outer element along the longitudinal axis of the inner rotary driving member.

[0025] According to a preferred embodiment of the present application, the end surface of the side of the protrusion facing the first stage planetary gear set has a semi-spherical recess, and the surface of the recess facing the protrusion has a semi-spherical boss; or

[0026] The end surface of the side of the protrusion facing the first stage planetary gear set has a semi-spherical boss, and the surface of the recess facing the protrusion has a semi-spherical recess.

[0027] The above-mentioned semi-spherical boss / recess can also be a partial spherical boss / recess, or a boss / recess including a bevel, or a conical boss and recess, or a boss / recess including a helical surface, etc.

[0028] According to a preferred embodiment of the present application, a first elastic element is provided between the first stage sun gear and the outer element, and the first elastic element biases the outer element towards the inner element.

[0029] According to a preferred embodiment of the present application, the first elastic element is a wave spring, a disc spring, a coil spring, or a rubber elastic piece.

[0030] According to a preferred embodiment of the present application, an engaging portion is provided on the end surface of the side of the outer element facing the first stage planetary gear set, and an engaging portion is provided on the end surface of the side of the first stage sun gear facing the outer element, the engaging portion on the outer element being able to combine with the engaging portion on the first stage sun gear, so that the first stage sun gear combines with the outer element.

[0031] According to a preferred embodiment of the present application, the engaging portion on the outer element and the engaging portion on the first stage sun gear are both engaging teeth, forming a tooth engagement; or

[0032] The engaging portion on the outer element and the engaging portion on the first stage sun gear form a key / keyway connection; or

[0033] The engaging portion on the outer element and the engaging portion on the first stage sun gear form a pin and hole fit.

[0034] According to a preferred embodiment of the present application, the movable connection of the driving disc and the outer element allows the driving disc to move axially relative to the inner rotary driving member along the longitudinal axis of the inner rotary driving member.

[0035] According to a preferred embodiment of the present application, an engaging portion is provided on the end surface of the side of the outer element facing the driving disc, and an engaging portion is provided in the end surface of the side of the driving disc facing the outer element, the engaging portion on the outer element being able to combine with the engaging portion on the driving disc, so that the driving disc can be driven to rotate under the driving of the outer element, and can move axially relative to the inner rotary driving member along the longitudinal axis of the inner rotary driving member.

[0036] According to a preferred embodiment of the present application, the connecting part on the outer element is a sliding shaft, and the connecting part on the driving disc is a sliding hole; or

[0037] The connecting part on the outer element is a sliding hole, and the connecting part on the driving disc is a sliding shaft.

[0038] According to a preferred embodiment of the present application, the number of sliding shafts is multiple and uniformly distributed in the circumferential direction; the number of sliding holes is multiple and uniformly distributed in the circumferential direction. Or a key / keyway connection is adopted, or other sliding connection.

[0039] According to a preferred embodiment of the present application, a second elastic element is arranged between the inner element and the driving disc, which biases the driving disc towards the power output element.

[0040] According to a preferred embodiment of the present application, the end face of the side of the driving disc towards the power output element comprises at least a third curved surface, and the surface of the power output element towards the driving disc comprises at least a fourth curved surface, the third curved surface and the fourth curved surface are shape-matched, so that the driving disc rotates together with the power output element when the load on the power output element is less than a predetermined load, and the driving disc is disengaged from the power output element when the load on the power output element is greater than the predetermined load.

[0041] According to a preferred embodiment of the present application, a friction plate is arranged on the end face of the side of the driving disc towards the power output element; and / or a friction plate is arranged on the surface of the power output element towards the driving disc, so that the driving disc rotates together with the power output element when the load on the power output element is less than a predetermined load, and the driving disc is disengaged from the power output element when the load on the power output element is greater than the predetermined load.

[0042] According to a preferred embodiment of the present application, the engagement and disengagement between the driving disc and the power output element is realized by a magnetic clutch.

[0043] According to a preferred embodiment of the present application, the planetary gear reduction mechanism further comprises a second-stage planetary gear set, the second-stage planetary gear set comprising a second-stage sun gear, a second-stage ring gear, a second-stage carrier and a plurality of second-stage planetary gears, wherein the second-stage sun gear serves as the power output element, and the second-stage carrier serves as the power output element of the next stage.

[0044] According to a preferred embodiment of the present application, the planetary gear reduction mechanism further comprises a third stage planetary gear set, the third stage planetary gear set comprising a third stage sun gear, a third stage ring gear, a third stage carrier and a plurality of third stage planet gears, wherein the second stage carrier is fixedly connected with the third stage sun gear.

[0045] According to another aspect of the present application, there is provided an electric winch with an automatic transmission assembly, the electric winch comprising:

[0046] The automatic transmission assembly as claimed in any one of the preceding embodiments;

[0047] An actuating device connected with the inner rotary drive of the automatic transmission assembly;

[0048] A drum directly or indirectly connected with the power output element; and

[0049] A housing.

[0050] According to a preferred embodiment of the present application, the actuating device comprises an electric motor and a transmission and braking device, the transmission and braking device being in transmission connection with the electric motor, and the inner rotary drive being in transmission connection with the transmission and braking device.

[0051] The automatic transmission assembly and the electric winch with the automatic transmission assembly of the present application have the following advantages:

[0052] The automatic transmission assembly and the electric winch with the automatic transmission assembly of the present application can realize the automatic transmission function, and can automatically switch the transmission ratio according to the load change (such as the load of the cable on the drum of the electric winch), for example, in the conditions of empty load rope winding and rope winding, the small transmission ratio can be automatically switched to work, the drum speed is higher, and the rope winding and unwinding action is more efficient; while in the conditions of load traction or load release (when the load is larger), the large transmission ratio can be used to work, at this time the output torque of the electric motor is fully amplified, the tension of the cable is higher, and the working requirements of large load are met. Moreover, all switching processes are automatically performed by the load change on the cable, without manual intervention, effectively reducing the working intensity, and all processes are completely realized by mechanical means, and the reliability is fully guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 A schematic view of an electric winch with an automatic transmission assembly according to an embodiment of the present application;

[0054] Figure 2 A partial perspective view of an electric winch with an automatic transmission assembly according to an embodiment of the present application, wherein the housing, the ring gear of the three-stage planetary gear set and the actuating device part of the electric winch are removed;

[0055] Figure 3 is a partial exploded view of the left side portion in Figure 2 is a partial exploded view of the portion between the plurality of planet gears of the first stage planetary gear set and the plurality of planet gears of the second stage planetary gear set in Figure 2

[0056] Figure 4 shows the outer element in Figure 3 from another angle. DETAILED DESCRIPTION

[0057] Exemplary embodiments of the present application are described in detail below with reference to the attached drawings. The same or similar components have the same reference numbers and markings, and thus, their explanation will not be repeated. 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 skilled in the art that one or more embodiments can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form to avoid obscuring the accompanying drawings.

[0058] Figure 1 is a schematic view of an electric winch to which the automatic transmission assembly of the present application is applied, as shown, the electric winch includes the automatic transmission assembly 1, a housing 2, a drum 3, a motor 4, and a transmission and brake device 5. Here, the motor 4 and the transmission and brake device 5 constitute an actuating device, which is connected to an input shaft 101 of an inner rotary driving member (to be described later) of the automatic transmission assembly 1, specifically, the transmission and brake device 5 is in driving connection with the motor 4, and the input shaft 101 of the inner rotary driving member is in driving connection with the transmission and brake device 5. The housing 2 is used to connect and support various components and fix the electric winch as a whole, the drum 3 is directly or indirectly connected to an output end (a power output element to be described later) of the automatic transmission assembly 1, and a rope of the electric winch is wound on the drum 3.

[0059] The automatic transmission assembly 1 is described in detail below, in an exemplary embodiment, the automatic transmission assembly 1 includes a first stage planetary gear set 11, a second stage planetary gear set 12, and a third stage planetary gear set 13, the first stage planetary gear set 11 is a high speed stage planetary gear set, the second stage planetary gear set 12 is a low speed stage planetary gear set, and the third stage planetary gear set 13 is an output stage planetary gear set, each of the planetary gear sets includes a sun gear, a ring gear, a carrier, and a plurality of planet gears, that is, the first stage planetary gear set 11 includes a first stage sun gear 111, a first stage ring gear, a first stage carrier 112, and a plurality of first stage planet gears; the second stage planetary gear set 12 includes a second stage sun gear 121, a second stage ring gear, a second stage carrier, and a plurality of second stage planet gears; and the third stage planetary gear set 13 includes a third stage sun gear, a third stage ring gear, a third stage carrier, and a plurality of third stage planet gears. The ring gears of all the planetary gear sets are fixedly connected with the housing 2.​

[0060] In the transmission, the first stage carrier 112 of the first stage planetary gear set 11 is connected with the second stage sun gear 121 of the second stage planetary gear set 12, the second stage carrier of the second stage planetary gear set 12 is connected with the third stage sun gear of the third stage planetary gear set 13, the output element of the third stage planetary gear set 13 is the third stage carrier, and the third stage carrier is connected with the drum 3. It should be noted that when the automatic transmission assembly 1 is applied to the electric winch, the third stage carrier is the final power output element connected with the drum 3, and when the automatic transmission assembly 1 is not applied to the electric winch, the third stage carrier is the final power output element connected with the element that needs to be driven to rotate.

[0061] It should be noted that in the embodiment of the drawings, the automatic transmission assembly 1 is set to have three-stage planetary gear sets, but the automatic transmission assembly 1 can have only two-stage planetary gear sets, or only one-stage planetary gear set, or other number of planetary gear sets. When the automatic transmission assembly 1 has two-stage planetary gear sets, the first stage carrier 112 of the first stage planetary gear set 11 is fixedly connected with the second stage sun gear 121 of the second stage planetary gear set 12, the second stage sun gear 121 is the power output element of the first stage planetary gear set 11, and the second stage carrier is the power output element of the next stage. When the automatic transmission assembly 1 has only one-stage planetary gear set, the automatic transmission assembly 1 can include a separate power output element, and the first stage carrier 112 is connected with the power output element. Here, the combination of the first stage planetary gear set 11 and the power output element, or the combination of the multi-stage planetary gear sets, serves as a planetary gear reduction mechanism. In addition, the power output element is not limited to be the same component, but can also be two different components, for example, the second stage sun gear and the third stage sun gear can simultaneously serve as the power output elements of the first stage planetary gear set and the drive disc, respectively, i.e., they can be connected with the upstream transmission in different clutch states, respectively.

[0062] In addition to the planetary gear reduction mechanism, the automatic transmission assembly 1 further includes an inner rotating driving element (the combination of the input shaft 101 and the inner element 102), an outer element 103, a first elastic element 104, a drive disc 105, and a second elastic element 106.

[0063] The inner rotary drive member comprises: an input shaft 101 configured to be connectable with the actuating device for inputting the actuating force; and an inner element 102 fixedly arranged on the input shaft 101. Here, the input shaft 101 and the inner element 102 can be an integral piece; or alternatively, the input shaft 101 and the inner element 102 are separate pieces and are fixedly connected, specifically, can be achieved by means of screws, snap rings, interference, etc. In the embodiment of the drawings, a shoulder is arranged on the input shaft 101 for one-way positioning of the inner element 102.

[0064] The outer element 103 is in the form of a hollow ring and is sleeved on the inner rotary drive member, the hollow portion of the outer element 103 can pass through the input shaft 101 without affecting the rotation of the input shaft 101, and the inner element 102 is at least partially placed in the hollow portion of the outer element 103. The outer element 103 is movably connected with the inner rotary drive member (the inner element 102), so that the outer element 103 can be driven to rotate under the driving of the inner rotary drive member, and the movable connection between the outer element 103 and the inner rotary drive member (the inner element 102) allows the outer element 103 to move axially along the longitudinal axis of the inner rotary drive member between a first position and a second position relative to the inner rotary drive member.

[0065] Referring to Figure 3 and Figure 4 , the inner element 102 comprises a central portion and at least one protruding portion protruding outward from the central portion, and the outer element 103 is provided with a central groove for accommodating the central portion and a recessed portion corresponding to the protruding portion for accommodating the protruding portion; the size of the recessed portion along the circumference of the outer element 103 is greater than the size of the protruding portion along the circumference of the inner element 102, so that the protruding portion can rotate movably around the axis of the inner element 102 in the recessed portion.

[0066] Advantageously, the inner element 102 comprises a plurality of protruding portions uniformly distributed along the circumference of the inner element 102; and the outer element 103 comprises a plurality of recessed portions uniformly distributed along the circumference of the outer element 103. Preferably, the number of protruding portions is three and the number of recessed portions is three, as shown in the figure. The plurality of protruding portions and the plurality of recessed portions are centrally symmetric along the circumference, and each protruding portion and each recessed portion is axially symmetric by itself.

[0067] According to a preferred embodiment of the present application, the end face of the protrusion on the side facing the first stage planetary gear set 11 comprises at least a first curved surface, and the surface of the recess on the side facing the protrusion comprises at least a second curved surface, the first curved surface and the second curved surface are shape-matched, so that the rotating movement of the protrusion in the recess around the axis of the inner element 102 can cause the outer element 103 to move axially along the longitudinal axis of the inner rotating drive. Preferably, the end face of the protrusion on the side facing the first stage planetary gear set 11 has a semispherical pit, and the surface of the recess on the side facing the protrusion has a semispherical boss 1032 Figure 3 、 4 of the illustrated embodiment); or alternatively, the end face of the protrusion on the side facing the first stage planetary gear set 11 has a semispherical boss, and the surface of the recess on the side facing the protrusion has a semispherical pit. Advantageously, the semispherical boss or the semispherical pit is located at the position of the center of symmetry of the recess or the protrusion.

[0068] In addition, the semispherical boss / pit can also be a partial spherical pit / boss, or a pit / boss comprising an inclined surface, or a pit and a conical boss, or a pit / boss comprising a helical surface, etc.

[0069] The matching of the pit and the boss corresponds to the matching of the first curved surface and the second curved surface, that is, the pit and the boss are specific implementations of the first curved surface and the second curved surface, and here as long as the curved surface matching can convert the circumferential force into axial action, that is, the protrusion in the recess can rotate to cause the outer element 103 to move axially along the longitudinal axis of the inner rotating drive. In addition to the combination of the pit and the boss, the matching first curved surface and the second curved surface can also be one or a combination of several curved surfaces such as spherical surface, cylindrical surface, conical surface, circular boss surface, inclined surface, parabolic surface, hyperbolic surface, cam surface, and helical surface.

[0070] The end face of the outer element 103 on the side facing the first stage planetary gear set 11 is provided with an engaging part, and the end face of the first stage sun gear 111 on the side facing the outer element 103 is provided with an engaging part, the engaging part on the outer element 103 can be combined with the engaging part on the first stage sun gear 111, so that the first stage sun gear 111 is combined with the outer element 103.

[0071] As a specific embodiment, the engaging part on the outer element 103 and the engaging part on the first stage sun gear 111 are both engaging teeth (for example, the engaging teeth 1031 on the outer element 103), forming a tooth engagement (see Figure 3 、 4) or the engagement portion on the outer element 103 and the engagement portion on the first stage sun gear 111 form a key / spline connection or the engagement portion on the outer element 103 and the engagement portion on the first stage sun gear 111 form a pin hole fit (similar to the fit of the sliding axle 1033 with the sliding hole to be described below). Through the above engagement portion, the separation and engagement of the outer element 103 and the first stage sun gear 111 are achieved. Of course, the engagement portion on the outer element 103 and the engagement portion on the first stage sun gear 111 can also be in other forms as long as the above clutching is achieved. Importantly, through the above technical means, the first stage sun gear 111 is configured to be disengaged from the outer element 103 at the first position of the outer element 103 and engaged with the outer element 103 at the second position of the outer element 103.

[0072] A first elastic element 104 is arranged between the first stage sun gear 111 and the outer element 103, which biases the outer element 103 towards the inner element 102, and the first elastic element 104 is preferably a wave spring. The first position of the outer element 103 corresponds to the position where the wave spring pushes the outer element 103 towards the inner element 102, and the second position of the outer element 103 corresponds to the position where the outer element 103 is pushed towards the first stage sun gear 111 by the inner element 102 (by means of the action of the boss 1032 and the recess). In addition, the first elastic element 104 can also be a disc spring, a coil spring, or a rubber elastic element, etc.

[0073] The driving disc 105 is described below, which is arranged on one side of the outer element 103 along the longitudinal axis of the inner rotary driving member, and the driving disc 105 is movably connected with the outer element 103, so that the driving disc 105 can be driven to rotate under the driving of the outer element 103, and the driving disc 105 is configured to be capable of changing between a first state of being combined with the power output element and a second state of being disengaged from the power output element, according to one preferred embodiment of the present application, the movable connection of the driving disc 105 with the outer element 103 allows the driving disc 105 to move axially relative to the inner rotary driving member along the longitudinal axis of the inner rotary driving member.

[0074] Specifically, the end face of the outer element on the side facing the driving disc 105 is provided with a connecting part, and the end face of the driving disc 105 on the side facing the outer element 103 is provided with a connecting part, the connecting part on the outer element can be combined with the connecting part on the driving disc 105, so that the driving disc 105 can be driven to rotate under the driving of the outer element 103, and can move axially relative to the inner rotary driving piece along the longitudinal axis of the inner rotary driving piece. For example, the connecting part on the outer element is a sliding shaft 1033, and the connecting part on the driving disc 105 is a sliding hole; or the connecting part on the outer element is a sliding hole, and the connecting part on the driving disc 105 is a sliding shaft.

[0075] The driving disc 105 is located between the outer element 103, the inner element 102 and the second-stage sun gear 121 of the second-stage planetary gear set 12, and is in sliding connection with the sliding shaft 1033 of the outer element 103 through the circular hole (sliding hole) thereon. Here, the combination of the two connecting parts can also be achieved by using splines, sliding keys and the like, as long as the combination can achieve the transmission of rotary motion and also enable axial movement within a certain range. Advantageously, the number of sliding shafts is multiple and uniformly distributed in the circumferential direction; and the number of sliding holes is multiple and uniformly distributed in the circumferential direction. In addition, they can also be connected by keys or splines, or other sliding connections.

[0076] A second elastic element 106 is arranged between the inner element 102 and the driving disc 105, and the second elastic element 106 biases the driving disc 105 towards the power output element. The second elastic element 106 can be a coil spring, one end of which is mounted on the shoulder of the input shaft 101, and the other end of which is mounted on the driving disc 105, so that the driving disc 105 abuts against the second-stage sun gear 121 of the second-stage planetary gear set 12 with a certain pressure,

[0077] According to the technical concept of the present application, the end face of the driving disc 105 on the side facing the power output element is provided with a friction plate; and / or the surface of the power output element facing the driving disc 105 is provided with a friction plate, so that the driving disc 105 rotates together with the power output element when the load on the power output element is less than a predetermined load, and the driving disc 105 is disengaged from the power output element when the load on the power output element is greater than the predetermined load. That is, there is a friction material on the contact surface of the driving disc 105 and the second-stage sun gear 121 of the second-stage planetary gear set 12 to increase the friction.

[0078] This is achieved by the friction plate to drive the disc 105 and the second stage sun gear 121 in some time, in some time, off the combination. Of course, you can also use the surface combination, as the first surface and the second surface as described above, the surface combination can also have a certain force transmission, and in the resistance exceeds a certain range can be relatively sliding or rotating. Therefore, the present application can also be designed as: the drive disc 105 towards the power output element of the side of the end face at least includes the third surface, and the power output element of the surface towards the drive disc 105 at least includes the fourth surface, the third surface and the fourth surface shape matching, so that the load on the power output element is less than the predetermined load when the drive disc 105 and the power output element together rotate, and when the load on the power output element is greater than the predetermined load, the drive disc 105 and the power output element are disengaged. The matching third surface and the fourth surface can be a combination of pits and bosses, can be a hemispherical pit and a hemispherical boss, or a combination of one or more of the spherical surface, cylindrical surface, conical surface, circular table surface, inclined surface, parabolic surface, hyperbolic surface, cam surface.

[0079] Alternatively, the clutch between the drive disc 105 and the second stage sun gear 121 can be achieved by magnetic clutch, for example, the drive disc 105 is provided with permanent magnet or electromagnet, the second stage sun gear 121 is provided with permanent magnet or electromagnet with opposite magnetic pole, when the load on the second stage sun gear 121 is small, the two are magnetically connected together, rotate together, when the load on the second stage sun gear 121 is large, the two are forced to separate.

[0080] The working process of the electric winch with automatic transmission assembly of the present application is described as follows:

[0081] When the cable on the drum 3 is empty, that is, the drum 3 is in light load working condition, the motor 4 drives the input shaft 101 to rotate through the transmission and brake device 5, that is, drives the inner element 102 to rotate, at this time, due to the action of the wave spring 104, the boss 1032 on the outer element 103 is closely engaged with the pit on the inner element 102, and the side surface of the protruding part of the inner element 102 does not contact the side surface of the groove part of the outer element 103 (the protruding part is just located in the middle of the groove part, so it does not contact the surface of the groove part), the inner element 102 drives the outer element 103 to rotate, and since the outer element 103 is in sliding connection with the drive disc 105, the drive disc 105 also rotates, under the action of the spiral spring 106, the friction force between the drive disc 105 and the second stage sun gear 121 of the second stage planetary gear set 12 drives the second stage sun gear 121 of the second stage planetary gear set to rotate, that is, the power is input from the second stage sun gear 121 of the second stage planetary gear set, driving the drum 3 to rotate, at this time, the transmission is relatively small, the drum 3 rotates at high speed, and the efficiency of emptying or winding the cable is high.

[0082] When the load on the cable on the drum 3 is large (greater than the preset load value), i.e. the drum 3 is in the load working condition, the rotation resistance is large, which is transmitted to the second-stage sun gear 121 of the second-stage planetary gear set 12 and also acts on the driving disc 105 and the outer element 103. At this time, the axial component of the force between the boss 1032 on the outer element 103 and the recess on the inner element 102 is greater than the elastic force of the wave spring 104, so the outer element 103 moves horizontally left relative to the inner element 102 and rotates until the side surface of the protruding part of the inner element 102 abuts against the side surface of the recess part of the outer element 103. At this time, the boss 1032 on the outer element 103 is partially in contact with the recess on the inner element 102. In this process, the outer element 103 compresses the wave spring 104 and moves towards the first-stage planetary gear set 11. The engaging part (engaging tooth 1031) on the outer element 103 engages with the engaging part (engaging tooth) on the first-stage sun gear 111 of the first-stage planetary gear set 11. The power is input from the first-stage sun gear 111 of the first-stage planetary gear set 11 (high-speed planetary gear set) to drive the drum 3 to rotate at the maximum transmission ratio. The input torque of the motor is boosted to the maximum value to meet the requirement of large load working. Due to the motion interference, the driving disc 105 is disengaged from the second-stage sun gear 121.

[0083] The automatic speed change assembly and the electric capstan with the automatic speed change assembly have the following advantages:

[0084] The automatic speed change assembly and the electric capstan with the automatic speed change assembly can realize the automatic speed change function. For example, the electric capstan with the automatic speed change assembly can automatically switch the transmission ratio according to the load change (such as the load of the cable on the drum of the electric capstan) to work at a small transmission ratio in the no-load rope winding and unwinding working condition, so that the drum rotates at a high speed and the rope winding and unwinding action is more efficient. In the load traction or load release (when the load is large) working condition, the electric capstan works at a large transmission ratio, so that the output torque of the motor is fully amplified and the tension of the cable is high, which meets the requirement of large load working. Moreover, all the switching processes are automatically performed by the load change on the cable without manual intervention, which effectively reduces the working intensity and all the processes are completely realized by the mechanical mode, so that the reliability is fully guaranteed.

[0085] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that changes can be made in these embodiments without departing from the principles and spirit of the present application. The scope of application of the present application is defined by the appended claims and their equivalents.

[0086] List of reference signs:

[0087] 1 automatic speed change assembly

[0088] 2 housing

[0089] 3 drum

[0090] 4 motor

[0091] 5 transmission and braking device

[0092] 11 first stage planetary gear set

[0093] 12 second stage planetary gear set

[0094] 13 third stage planetary gear set

[0095] 101 input shaft

[0096] 102 inner element

[0097] 103 outer element

[0098] 104 first elastic element

[0099] 105 drive disc

[0100] 106 second elastic element

[0101] 111 first stage sun gear

[0102] 112 first stage carrier

[0103] 121 second stage sun gear

[0104] 1031 engagement tooth

[0105] 1032 boss

[0106] 1033 sliding shaft

Claims

1. An automatic transmission assembly (1), characterized in that, The automatic transmission assembly (1) includes: The planetary gear reduction mechanism includes a first-stage planetary gear set (11) and a power output element. The first-stage planetary gear set (11) includes a first-stage sun gear (111), a first-stage ring gear, a first-stage planet carrier (112), and multiple first-stage planetary gears. The first-stage planet carrier (112) is connected to the power output element. Internal rotary drive component; An outer element (103) is sleeved on an inner rotary drive member, and the outer element (103) is movably connected to the inner rotary drive member, such that the outer element (103) can be driven to rotate under the drive of the inner rotary drive member, and the movable connection between the outer element (103) and the inner rotary drive member allows the outer element (103) to move axially along the longitudinal axis of the inner rotary drive member between a first position and a second position relative to the inner rotary drive member; and A drive disk (105) is disposed on one side of the outer element (103) along the longitudinal axis of the inner rotation drive member, and the drive disk (105) is movably connected to the outer element (103) so that the drive disk (105) can be driven to rotate under the drive of the outer element (103). The drive disk (105) is configured to change between a first state engaged with the power output element and a second state disengaged from the power output element. The first-stage sun gear (111) is configured to disengage from the outer element (103) at a first position and engage with the outer element (103) at a second position.

2. The automatic transmission assembly (1) according to claim 1, characterized in that, The internal rotation drive includes: The input shaft (101) is configured to connect to an actuator for inputting actuating force; The internal component (102) is fixedly mounted on the input shaft (101).

3. The automatic transmission assembly (1) according to claim 2, characterized in that: The inner element (102) includes a central portion and at least one protrusion extending outward from the central portion, and the outer element (103) is provided with a central groove and a groove corresponding to the protrusion, the central groove being used to receive the central portion and the groove being used to receive the protrusion. The circumferential dimension of the groove portion along the outer element (103) is greater than the circumferential dimension of the protrusion portion along the inner element (102), so that the protrusion portion can rotate within the groove portion about the axis of the inner element (102).

4. The automatic transmission assembly (1) according to claim 3, characterized in that: The end face of the protrusion facing the first-stage planetary gear set (11) includes at least a first curved surface, and the surface of the groove facing the protrusion includes at least a second curved surface. The first and second curved surfaces are matched in shape, such that the rotational movement of the protrusion within the groove about the axis of the inner element (102) can cause the outer element (103) to move axially along the longitudinal axis of the inner rotation drive.

5. The automatic transmission assembly (1) according to claim 2, characterized in that: A first elastic element (104) is provided between the first-stage sun gear (111) and the outer element (103), and the first elastic element (104) biases the outer element (103) toward the inner element (102).

6. The automatic transmission assembly (1) according to claim 5, characterized in that: The outer element (103) has a joint on the end face facing the first stage planetary gear set (11), and the first stage sun gear (111) has a joint on the end face facing the outer element (103). The joint on the outer element (103) can engage with the joint on the first stage sun gear (111), so that the first stage sun gear (111) engages with the outer element (103).

7. The automatic transmission assembly (1) according to claim 1, characterized in that: The movable connection between the drive disk (105) and the outer element (103) allows the drive disk (105) to move axially relative to the inner rotating drive along the longitudinal axis of the inner rotating drive.

8. The automatic transmission assembly (1) according to claim 7, characterized in that: A connecting portion is provided on the end face of the outer element facing the drive disk (105), and a connecting portion is provided on the end face of the drive disk (105) facing the outer element (103). The connecting portion on the outer element can be combined with the connecting portion on the drive disk (105), so that the drive disk (105) can be driven to rotate under the drive of the outer element (103), and can move axially relative to the inner rotation drive member along the longitudinal axis of the inner rotation drive member.

9. The automatic transmission assembly (1) according to claim 2, characterized in that: A second elastic element (106) is provided between the inner element (102) and the drive disk (105), and the second elastic element (106) biases the drive disk (105) toward the power output element.

10. The automatic transmission assembly (1) according to any one of claims 1-9, characterized in that: The end face of the drive disk (105) facing the power output element includes at least a third curved surface, and the surface of the power output element facing the drive disk (105) includes at least a fourth curved surface. The third and fourth curved surfaces are shaped to match such that when the load on the power output element is less than a predetermined load, the drive disk (105) rotates together with the power output element, and when the load on the power output element is greater than the predetermined load, the drive disk (105) disengages from the power output element.

11. The automatic transmission assembly (1) according to any one of claims 1-9, characterized in that: A friction plate is provided on the end face of the drive disk (105) facing the power output element; and / or a friction plate is provided on the surface of the power output element facing the drive disk (105), such that when the load on the power output element is less than a predetermined load, the drive disk (105) rotates together with the power output element, and when the load on the power output element is greater than the predetermined load, the drive disk (105) disengages from the power output element.

12. The automatic transmission assembly (1) according to any one of claims 1-9, characterized in that: The engagement / disengagement between the drive disc (105) and the power output element is achieved through a magnetic clutch.

13. The automatic transmission assembly (1) according to any one of claims 1-9, characterized in that: The planetary gear reduction mechanism further includes a second-stage planetary gear set (12), which includes a second-stage sun gear (121), a second-stage ring gear, a second-stage planet carrier, and multiple second-stage planetary gears. The second-stage sun gear (121) serves as the power output element, and the second-stage planet carrier serves as the power output element of the next stage.

14. An electric winch having an automatic transmission assembly (1), characterized in that, The electric winch includes: Automatic transmission assembly (1) as described in any one of claims 1-13; An actuation device is connected to the internal rotary drive component of the automatic transmission assembly (1); The roller (3) is directly or indirectly connected to the power output element; and Shell (2).

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