Tension structure and drum motor

Abstract

The present application relates to the technical field of conveying equipment and provides a tension structure and a drum motor, the tension structure being used to connect a drive member and a rotating member, and capable of rotating the rotating member about a rotation axis when driven by the drive member, and comprising: a first connecting member power-transmittingly connected to the drive member; a position restricting member having a bottom wall and a side wall along the periphery of the bottom wall with an attachment groove formed therein, the bottom wall being detachably connected to the first connecting member so that the side wall can be fitted onto the first connecting member; and a tension member engaging with the attachment groove, the side facing away from the first connecting member protruding from the attachment groove and capable of abutting against the rotating member. The tension structure generates a reliable frictional force between the tension member and the rotating member, achieving a fixed connection and allowing the rotating member to rotate about the rotation axis. This connection method has low requirements for the shape of the tension structure, thereby reducing the requirements for processing accuracy and solving the technical problems of conventional connection methods between a drum and a sleeve, which require high processing accuracy and are complicated to attach and detach.

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on February 15, 2023, bearing application number 202310151068.9 and entitled "Tension structure and drum motor," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of conveying equipment, and in particular to tension structures and drum motors. [Background technology]

[0003] Drum motors are often used to transport a variety of heavy objects, and because of the special nature of their use, they must be subjected to large torsions, so the connection strength between the power output part of the drive member and the drum must be high.

[0004] In the prior art, a drum and a motor-driven sleeve are often fitted together by an interference fit, in which a sleeve with a diameter slightly larger than the inner diameter of the drum is pressed into place by tooling to create a certain radial pressure, which generates a large frictional force when an external force is applied to the sleeve or drum, thereby achieving a fixed connection between the drum and sleeve. However, this connection method requires high processing precision for the sleeve and drum, and requires the use of corresponding tooling, which increases investment costs and complicates installation and removal. Summary of the Invention [Problem to be solved by the invention]

[0005] The present application aims to provide a tension structure and drum motor that solve the technical problems of conventional drum motors, such as the high requirements for processing accuracy in the connection method between the drum and sleeve and the complicated attachment and detachment process. [Means for solving the problem]

[0006] An embodiment of the first aspect of the present application is a tension structure that is used to connect a drive member and a rotating member, and that can move the rotating member to rotate around a rotation axis by driving the drive member, a first connecting member that is power-transmittingly connected to the driving member; a position restriction member including a bottom wall and a side wall provided along the periphery of the bottom wall and having an attachment groove therein, the bottom wall being detachably connected to the first connecting member, so that the side wall can be fitted into the first connecting member; The tension structure includes a tension member that engages with the mounting groove, the side that faces away from the first connecting member protruding from the mounting groove, and the tension member that can abut against the rotating member.

[0007] In one embodiment, the length of the mounting groove along the direction of the pivot axis is smaller than the length of the tension member.

[0008] In one embodiment, the tension member has a continuous uneven pattern on the side facing away from the first connecting member.

[0009] In one embodiment, the side wall has a plurality of protruding posts provided at intervals, and a recessed groove is provided on the side of each of the protruding posts facing the adjacent protruding post, and any one of the recessed grooves and the opposing recessed groove surround the mounting groove having one mounting opening, The tension member has position-regulating protrusions provided on both sides at intervals and engaging with the corresponding recessed grooves, and the tension member can be movably inserted into the mounting groove through the mounting opening.

[0010] In one embodiment, the first connecting member includes a first segment and a second segment connected to each other along the direction of the pivot axis, the diameter of the first segment is smaller than the diameter of the second segment, and a step surface is formed at a connection point between the first segment and the second segment; The side wall is fitted to the first segment, and the end away from the bottom wall abuts against the step surface.

[0011] In one embodiment, the first connecting member further includes a fitting portion that is protruded from the outer wall of the first segment and has a first fitting slope, The tension member is slidably connected to the mating portion, and is arranged so that its extension direction is inclined relative to the sliding direction of the tension member.The tension member has a second mating slope that is parallel to the first mating slope and abuts against it.

[0012] In one embodiment, a receiving chamber is provided in each of the first segment and the second segment, the first connecting member further includes a connecting portion provided in the receiving chamber, and a through hole is opened in the bottom wall, The tension structure further includes a fastening member that is provided through the through hole and connected to the connecting portion.

[0013] In one embodiment, the tension structure further includes an elastic member and a second connecting member accommodated in the accommodation chamber, the elastic member is fitted into the second connecting member and engages with the second segment, and the second connecting member is used to connect to the output shaft of the driving member.

[0014] The tensioning mechanism includes a first connecting member, a position restricting member, and a tensioning member. The first connecting member is power-transmittingly connected to the driving member and rotatable about a rotation axis. The bottom wall of the position restricting member is detachably connected to the first connecting member. The tensioning member engages with a mounting groove in the side wall of the position restricting member, allowing both the tensioning member and the position restricting member to rotate about the rotation axis along with the first connecting member. The tensioning member and the position restricting member can be easily attached and detached. The side of the tensioning member facing away from the first connecting member protrudes from the mounting groove and can abut against the rotating member, generating a reliable frictional force between the tensioning member and the rotating member, thereby achieving a fixed connection and allowing the rotating member to rotate about the rotation axis. This connection method places low requirements on the shape of the tensioning mechanism, thereby reducing the requirements for processing accuracy and solving the technical problems of conventional drum motors, such as the high processing accuracy required for the connection method between the drum and sleeve and the complicated installation and removal process.

[0015] An embodiment of a second aspect of the present application provides a drum motor including a tension structure according to any one of the embodiments of the first aspect.

[0016] In one embodiment, the rotating member is a drum, and a storage chamber is provided within the drum; The drum motor further includes a driving member and a transmission member, and the driving member, the transmission member and the tension structure are all housed in the storage chamber and connected in series, and the tension member of the tension structure abuts against the inner wall of the drum.

[0017] The drum motor achieves a fixed connection by utilizing the frictional force generated between the tensioning structure and the rotating member, allowing the rotating member to rotate around the rotation axis. This connection method places low requirements on the shape of the tensioning structure, thereby reducing the requirements for processing precision, and solving the technical problems of conventional drum motors, which have high processing precision requirements for the connection method between the drum and sleeve and are complicated to install and remove. In addition, by increasing or decreasing the number of tensioning members and mating parts, different frictional force requirements can be met, improving applicability. [Brief explanation of the drawings]

[0018] In order to more clearly explain the technical solutions in the embodiments of the present application, the following briefly introduces the drawings that need to be used in the description of the embodiments or prior art. The drawings in the following description are only some embodiments of the present application, and it is obvious to those skilled in the art that other drawings can be obtained according to these drawings without any creative work.

[0019] [Figure 1] FIG. 1 is a schematic diagram of a drum motor according to an embodiment of the present application. [Figure 2] FIG. 2 is an exploded schematic view of the drum motor shown in FIG. [Figure 3] FIG. 2 is a schematic diagram of the internal structure of the drum motor shown in FIG. [Figure 4] 3 is an exploded perspective view of a tension structure in the drum motor shown in FIG. 2. FIG. [Figure 5] 5 is a perspective exploded schematic view of the tension structure shown in FIG. 4 at another angle. [Figure 6] FIG. 5 is a schematic perspective view of a tension member in the tension structure shown in FIG. [Figure 7] 3 is an exploded perspective view of a transmission member and a driving member in the drum motor shown in FIG. 2. FIG. [Figure 8] 3 is an exploded perspective view of a driving member fixing mechanism and a motor housing in the drum motor shown in FIG. 2. FIG. [Figure 9]9 is an exploded perspective schematic view of the drive member fixing mechanism and the motor internal gear housing shown in FIG. 8 at another angle. FIG. [Explanation of symbols]

[0020] 100···drum motor, 10 tension structure, 11 first connecting member, 111 first segment, 112 second segment, 113 step surface, 114 fitting portion, 1141 first fitting inclined surface, 115 accommodation chamber, 116 connection portion, 12 position control member, 121 bottom wall, 122 side wall, 1221 convex pillar, 123 mounting groove, 124 mounting opening, 13 tension member, 131 position control protrusion, 132 second fitting inclined surface, 14 fastening member, 15 elastic member, 16 second connecting member, 20: Driving member; 21: Motor inner gear housing; 30... Rotating member, 31... Storage chamber, 40... Transmission member, 41... Housing, 42... Reduction member, 421... Sun gear, 422... Planet gear, 423... Planet gear carrier, 424... Straight shaft, 425... Rolling member, 43... Output shaft, 44... First bearing, 45... Annular elastic ring, 50: Drive member fixing mechanism, 51: Motor fixing member, 52: Motor connecting member, 53: Motor connecting fitting member, 60... Drum support mechanism, 61... Fixed member, 62... Joint sleeve, 63... Second bearing. DETAILED DESCRIPTION OF THE INVENTION

[0021] In order to clarify the purpose, technical solution and advantages of the present application, the present application will be further described in detail below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are only for the purpose of interpreting the present application, and are not intended to limit the present application.

[0022] It should be noted that when an element is said to be "fixed to" or "mounted on" another element, it may be directly or indirectly connected to the other element. When an element is said to be "connected to" another element, it may be directly or indirectly connected to the other element.

[0023] It should be noted that the orientations or positional relationships indicated by the terms "length," "width," "up," "down," "inside," "outside," etc. are based on the orientations or positional relationships shown in the drawings and are intended merely to facilitate and simplify the description of this application, and do not indicate or imply that such devices or elements must have a particular orientation, be configured and operated in a particular orientation, and should not be understood as limiting this application. In the description of this application, unless otherwise clearly and specifically limited, the meaning of "plurality" is two or more than two.

[0024] In this application, unless otherwise clearly specified or limited, the terms "attach," "connect," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or integration, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interaction between two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in this application according to specific circumstances.

[0025] An embodiment of the first aspect of the present application provides a tension structure for connecting a drive member and a rotating member, thereby providing a driving force for the drive member to rotate the rotating member.

[0026] 1 to 4, in one embodiment of the present application, the tension structure 10 is capable of moving the rotating member 30 to rotate around the rotation axis L by driving the driving member 20, wherein the rotation axis L overlaps with the central axis of the rotating member 30, and the tension structure 10 comprises a first connecting member 11, a position regulating member 12, and a tension member 13.

[0027] The first connecting member 11 is power-transmittingly connected to the driving member 20. Specifically, the first connecting member 11 is power-transmittingly connected to the output end of the driving member 20, and the output end of the driving member 20 rotates around the rotation axis L, so that the first connecting member 11 can also rotate around the rotation axis L.

[0028] The position control member 12 has a bottom wall 121 and a side wall 122 arranged along the periphery of the bottom wall 121, and an attachment groove 123 is opened in the side wall 122. The bottom wall 121 is removably connected to the first connecting member 11, so that the side wall 122 can be fitted into the first connecting member 11.

[0029] The tension member 13 engages with the mounting groove 123, and the side facing away from the first connecting member 11 protrudes from the mounting groove 123 and can abut against the rotating member 30. In other words, the tension member 13 protrudes from the mounting groove 123 along a direction perpendicular to the rotation axis L.

[0030] Specifically, the bottom wall 121 of the position restricting member 12 can be connected to the first connecting member 11 by a locking connection or a screw connection, which makes it easy to attach and detach, and the position restricting member 12 can rotate around the rotation axis L together with the first connecting member 11. Because the tension member 13 engages with the mounting groove 123 located on the side wall 122, when the side wall 122 of the position restricting member 12 is fitted into the first connecting member 11, the tension member 13 rotates around the rotation axis L together with the first connecting member 11. Furthermore, since the side of the tension member 13 facing away from the first connecting member 11 protrudes from the mounting groove 123 and can abut against the rotating member 30, the tension member 13 is fixedly connected to the rotating member 30, and the tension structure 10 simultaneously functions to transmit power and to provide support for the drive of the transmission member 40; in other words, the tension structure 10 moves the rotating member 30 to rotate around the rotation axis L.

[0031] It can be seen that a secure connection is achieved by creating a positive frictional force between the tension member 13 and the pivot member 30.

[0032] In this embodiment, the rotating member 30 is a drum, but it will be appreciated that in other embodiments of the present application, the rotating member 30 may be a belt or other structure wound around the tensioning structure 10 .

[0033] The tension structure 10 comprises a first connecting member 11, a position regulating member 12, and a tension member 13. The first connecting member 11 is power-transmittingly connected to the driving member 20 and rotates around the rotation axis L. The bottom wall 121 of the position regulating member 12 is detachably connected to the first connecting member 11. The tension member 13 engages with an attachment groove 123 in the side wall 122 of the position regulating member 12. Therefore, both the tension member 13 and the position regulating member 12 can rotate around the rotation axis L together with the first connecting member 11, and the tension member 13 and the position regulating member 12 can be easily attached and detached. In addition, since the side of the tension member 13 that is away from the first connecting member 11 protrudes from the mounting groove 123 and can abut against the rotating member 30, the tension member 13 generates a reliable frictional force between itself and the rotating member 30, realizing a fixed connection and allowing the rotating member 30 to move so as to rotate around the rotation axis L. In this type of connection method, the requirements for the shape of the tension structure 10 are low, which reduces the requirements for processing accuracy, solving the technical problems of conventional drum motors, where the connection method between the drum and sleeve requires high processing accuracy and is complicated to attach and detach.

[0034] 1 and 3 to 5, in one embodiment of the present application, the length of the mounting groove 123 along the direction of the rotation axis L is smaller than the length of the tension member 13. In this way, when the tension member 13 is placed in the mounting groove 123, it is pressed, increasing the radial pressure on the rotating member 30, and ensuring the stability of the connection between the rotating member 30 and the mounting groove 123.

[0035] In other embodiments of the present application, the length of the mounting groove 123 along the direction of the rotation axis L may be the same as the length of the tension member 13, and it is understood that by increasing the roughness of the side of the tension member 13 facing the rotating member 30, the radial pressure on the rotating member 30 can be increased, and this is not a limitation herein.

[0036] 3 and 4, in one embodiment of the present application, in order to provide a stable friction effect, the side of the tension member 13 that faces away from the first connecting member 11 is provided with a continuous uneven pattern. That is, the surface of the tension member 13 that faces away from the first connecting member 11 is rough. The continuous uneven pattern increases the surface roughness of the tension member 13, which increases the radial pressure of the tension member 13 against the rotating member 30, and improves the stability of the connection between the tension structure 10 and the rotating member 30.

[0037] In this embodiment, the tension member 13 is made of a metal material, which has high mechanical strength, is not easily deformed during a long pressing process, and provides a stable connection. It is understood that in other embodiments of the present application, the tension member 13 may be made of a ceramic material such as zirconia ceramic or a metal matrix composite material, and this is not a limitation herein.

[0038] Furthermore, the number of mounting grooves 123 on the side wall 122 is plural, and the plural mounting grooves 123 are uniformly distributed along the circumferential direction of the side wall 122. Correspondingly, the number of tension members 13 is plural, and they are placed in the corresponding mounting grooves 123.

[0039] It is understood that in other embodiments of the present application, the number of tension members 13 may be different, and the number of tension members 13 may be increased or decreased according to the frictional force needs. Alternatively, in other embodiments of the present application, the structure of the tension member 13 may be different. For example, the tension member 13 may be annular as a whole, and the mounting groove 123 may be annularly formed on the outer circumferential surface of the first connecting member 11. In this case, by replacing the tension member 13 with a different annular width, the radial pressure of the tension member 13 against the rotating member 30 can be changed. Accordingly, to ensure the stability of the connection between the tension member 13 and the first connecting member 11, when replacing the tension member 13 with a different annular width, it is necessary to replace the first connecting member 11 with a size corresponding to the mounting groove 123.

[0040] 3 to 5, in one embodiment of the present application, the side wall 122 has a plurality of protruding posts 1221 arranged at intervals, and a recessed groove is formed on the side of each protruding post 1221 facing the adjacent protruding post 1221, so that one recessed groove and the opposing recessed groove surround each other to form a mounting groove 123 having a mounting opening 124. The tension member 13 has position-limiting protrusions 131 arranged at intervals on both sides, and the position-limiting protrusions 131 engage with the corresponding recessed grooves so that the tension member 13 can be movably inserted into the mounting groove 123 through the mounting opening 124. In this way, the recessed grooves act as mounting guides and position-limiting protrusions 131 accommodated therein, increasing the stability of the connection between the tension member 13 and the position-limiting member 12, reducing the risk of the tension member 13 falling off, and facilitating attachment and detachment.

[0041] It can be understood that the attachment of the tension member 13 should be completed before assembling the position restricting member 12 and the first connecting member 11.

[0042] In other embodiments of the present application, the structure of the position regulating member 12 may be other, for example, the groove shapes of each protruding column 1221 facing the different adjacent protruding columns 1221 are different, and the shapes of the opposing sides of the tension member 13 are also different correspondingly. In this way, it can be understood that the mounting direction of the tension member 13 can be regulated, and the frictional resistance between the tension member 13 and the position regulating member 12 can be increased, making it less likely to fall off.

[0043] 3 to 5, in one embodiment of the present application, the first connecting member 11 includes a first segment 111 and a second segment 112 connected to each other along the direction of the rotation axis L. The diameter of the first segment 111 is smaller than the diameter of the second segment 112. A step surface 113 is formed at the connection between the first segment 111 and the second segment 112. The side wall 122 is fitted into the first segment 111, and the end remote from the bottom wall 121 abuts against the step surface 113. In this way, when assembling the position restricting member 12 and the first connecting member 11, the step surface 113 can restrict the position of the position restricting member 12, preventing the position restricting member 12 and the first connecting member 11 from being connected too tightly or not connected at a predetermined position, and ensuring that the frictional resistance between the tension member 13 and the rotating member 30 is appropriate.

[0044] 3 to 6, in this embodiment, the first connecting member 11 further includes a fitting portion 114 that is protruded from the outer wall of the first segment 111, and the fitting portion 114 includes a first fitting slope 1141. The tension member 13 is slidably connected to the fitting portion 114 and includes a second fitting slope 132 that extends in a direction inclined relative to the sliding direction of the tension member 13, and that is parallel to and abuts against the first fitting slope 1141. In other words, the extension direction of the first fitting slope 1141 is also inclined relative to the sliding direction of the tension member 13.

[0045] In this way, the second mating slope 132 abuts against the first mating slope 1141, and when an external force is applied, the tension member 13 can slightly slide along the first mating slope 1141 at the mating portion 114. Because the first mating slope 1141 is a slope, the tension member 13 is pressed and the pressure against the inner wall of the rotating member 30 increases as it moves, and the frictional force generated by the rough surface causes the rotating member 30 to rotate. In addition, by providing multiple tension blocks and mating portions 114 along the axial direction, a strong frictional force can be provided.

[0046] In this embodiment, the sliding direction of the tension member 13 is parallel to the rotation axis L.

[0047] In this embodiment, the first connecting member 11 has a plurality of fitting portions 114, which are uniformly distributed along the axial direction of the first segment 111 to accommodate a plurality of tension members 13. Since the tension members 13 are uniformly distributed along the axial direction, the radial pressure on the rotating member 30 of the tension structure 10 is uniformly distributed, and the connection between the first connecting member 11 and the rotating member 30 is stable. Meanwhile, along the sliding direction of the tension member 13, the height from the end of the fitting portion 114 close to the bottom wall 121 to the end of the fitting portion 114 close to the second segment 112 gradually increases.

[0048] In addition, the position-regulating protrusion 131 and the second mating inclined surface 132 of the tension member 13 are surrounded to form a single sliding groove, and the mating portion 114 can be accommodated within the sliding groove. Therefore, when the position-regulating member 12 and the tension member 13 are attached, a guiding action is realized by the sliding connection between the mating portion 114 and the sliding groove, which regulates the position of the tension member 13 and ensures accurate attachment.

[0049] 1 to 5, in one embodiment of the present application, a storage chamber 115 is provided in each of the first segment 111 and the second segment 112, the first connecting member 11 further includes a connection portion 116 provided in the storage chamber 115, a through-hole is formed in the bottom wall 121, and the tension structure 10 further includes a fastening member 14 that passes through the through-hole and is connected to the connection portion 116. In this way, the connection between the fastening member 14 and the connection portion 116 fixes the position restricting member 12, thereby realizing the fixation of the tension member 13.

[0050] The length of the tension member 13 is slightly longer than the length of the fitting portion 114. In this embodiment, the fastening member 14 is inserted through the through-hole and threadedly connected to the connecting portion 116, and the fastening member includes a bolt and a nut. The threaded connection between the bottom wall 121 and the connecting portion 116 achieves a simple connection structure and facilitates installation and removal. When the tension member 10 is installed, the bolt and nut are tightened, causing the bottom wall 121 to press the tension member 13. The tension member 13 moves along the fitting portion 114 away from the first connecting member 11, i.e., vertically, due to the pressure of the first fitting slope 1141. Because the tension member 13 is pressed horizontally, the pressure on the rotating member 30 increases, and the friction generated by the rough surface causes the rotating member 30 to rotate.

[0051] In addition, the first segment 111, the second segment 112, the fitting portion 114, and the connecting portion 116 are integrally molded, which simplifies the process, simplifies installation, and facilitates timely replacement.

[0052] In other embodiments of the present application, it is understood that the structure of the fastening member 14 may be other, for example, the fastening member 14 may be fixed by a locking connection or other methods, but is not limited thereto.

[0053] 2 to 5, in one embodiment of the present application, the tension structure 10 further includes an elastic member 15 and a second connecting member 16 housed in the housing 115, the elastic member 15 being fitted into the second connecting member 16 and engaging with the second segment 112, and the second connecting member 16 being used to connect to the output end of the driving member 20. In this way, the elastic member 15 has a vibration damping effect, and can prevent external forces such as vibrations received by the first connecting member 11 from being transmitted to the second connecting member 16 and the output shaft 43.

[0054] In this embodiment, the second connecting member 16 and the elastic member 15, and the elastic member 15 and the second segment 112 are all engaged with each other using multiple concave-convex structures, thereby preventing the relative positions of the second connecting member 16, the elastic member 15, and the second segment 112 from changing. In this case, the driving member 20 connected to the second connecting member 16 can move the first connecting member 11 to rotate around the rotation axis L.

[0055] Specifically, an attachment passage is opened in the elastic member 15, and the outer surface of the second connecting member 16 matches the shape of the attachment passage. A plurality of protrusions are formed on the outer surface of the elastic member 15, and a plurality of grooves that match the protrusions are formed on the inner wall of the second segment 112, thereby realizing a fixed connection between the elastic member 15 and the second segment 112 and limiting relative rotation between the elastic member 15 and the second segment 112. It is understood that in other embodiments of the present application, the second connecting member 16, the elastic member 15, and the inner wall of the second segment 112 may have other shapes, and this is not a limitation herein.

[0056] The tension structure 10 comprises a first connecting member 11, a position regulating member 12, and a tension member 13. The first connecting member 11 is power-transmittingly connected to the driving member 20 and rotates around the rotation axis L. The bottom wall 121 of the position regulating member 12 is detachably connected to the first connecting member 11. The tension member 13 engages with an attachment groove 123 on the side wall 122 of the position regulating member 12. Therefore, the tension member 13 and the position regulating member 12 can both rotate around the rotation axis L together with the first connecting member 11. Furthermore, the tension member 13 and the position regulating member 12 can be easily attached and detached. Furthermore, because the side of the tension member 13 facing away from the first connecting member 11 protrudes from the mounting groove 123 and can abut against the rotating member 30, a reliable frictional force is generated between the tension member 13 and the rotating member 30, realizing a fixed connection and allowing the rotating member 30 to rotate about the rotation axis L. This type of connection method places low requirements on the shape of the tension structure 10, reducing the requirements for processing accuracy and solving the technical problems of conventional drum motors, where the connection method between the drum and sleeve requires high processing accuracy and is complicated to install and remove. Furthermore, by increasing or decreasing the number of tension members 13 and fitting portions 114, different frictional force requirements can be met, improving applicability.

[0057] An embodiment of a second aspect of the present application provides a drum motor including the tension structure according to any one of the embodiments of the first aspect.

[0058] 1 to 3, in one embodiment of the present application, the rotating member 30 is a drum, and a storage chamber 31 is provided within the drum. The drum motor 100 further includes a driving member 20 and a transmission member 40, and the driving member 20, the transmission member 40 and the tensioning structure 10 are all accommodated within the storage chamber 31 and are connected in series, and the tensioning member 13 of the tensioning structure 10 abuts against the inner wall of the drum, so that the tensioning structure 10 can rotate the drum when driven by the driving member 20.

[0059] It can be seen that neither the driving member 20 nor the transmission member 40 directly contacts the drum. If the driving member 20, the transmission member 40 and the tensioning structure 10 are all accommodated in the storage chamber 31, the space occupied by the drum motor 100 can be saved.

[0060] 2, 3 and 7, the transmission member 40 comprises a housing 41 having a ring gear, a reduction member 42 located within the housing 41, and an output shaft 43. The reduction member 42 comprises a sun gear 421 fixedly connected to the output end of the driving member 20, a plurality of planet gears 422 arranged around the sun gear 421, and a planet gear carrier 423, each of which meshes with the sun gear 421 and the ring gear, and all of which are rotatably connected to the planet gear carrier 423. The output shaft 43 is arranged on the side of the planet gear carrier 423 away from the driving member 20 and can rotate synchronously with the planet gear carrier 423.

[0061] Specifically, a plurality of straight shafts 424 are provided to pass through the planetary gear carrier 423, and each planetary gear 422 is fitted onto a corresponding straight shaft 424. In order to improve the power transmission efficiency of the transmission member 40, rolling members 425, such as needle roller bearings or ball bearings, are embedded between the inner walls of the planetary gears 422 and the straight shafts 424, thereby changing the sliding friction between the planetary gears 422 and the straight shafts 424 during rotation into rolling friction, thereby significantly increasing the power transmission efficiency, reducing friction noise, and extending the life of the gearbox.

[0062] In addition, the transmission member 40 further includes a first bearing 44 fitted onto the output shaft 43, a position restriction groove is provided on the inner ring of the first bearing 44, and an annular elastic ring 45 is provided in the position restriction groove, so that the annular elastic ring 45 can be fitted onto the output shaft 43 and serves to eliminate gaps in the radial direction.

[0063] It is understood that in other embodiments of the present application, the position limiting groove may be provided on the output shaft 43, and no limitation is imposed thereon herein.

[0064] In this embodiment, referring to Figures 2, 3, 8 and 9, the drum motor 100 further includes a driving member fixing mechanism 50 and a rotating member support mechanism 60, the driving member fixing mechanism 50 is located at a first end of the rotating member 30 and a portion of it extends outside the storage chamber 31 and is used to fix and support the end of the driving member 20 away from the transmission member 40, and the rotating member support mechanism 60 is located at a second end of the rotating member 30 and a portion of it extends outside the storage chamber 31 and is used to support the rotating member 30.

[0065] Specifically, the driving member 20 is a motor and includes a motor internal gear housing 21. The driving member fixing mechanism 50 includes a motor fixing member 51, a motor connecting member 52, and a motor connecting fitting 53. The motor fixing member 51 is hexagonal, and the motor connecting member 52 has a certain small deformation capacity. The motor fixing member 51 and the motor connecting member 52 are fitted together by an interference fit and connected in a flat position, thereby ensuring that the motor connecting member 52 cannot rotate. The motor connecting member 52 and the motor connecting fitting 53 are fitted together by a plurality of concave-convex structures, thereby achieving fixation to the motor connecting fitting 53. The motor connecting member 52 has a certain elastic force, which can offset part of the influence of external forces from the motor fixing member 51 and prevent external forces such as vibrations received by the motor fixing member 51 from being transmitted to the motor, thereby achieving vibration damping. In addition, since the motor connecting fitting member 53 and the motor internal gear housing 21 are connected by a spline, the motor itself is fixed by the motor fixing member 51 and cannot rotate, thereby avoiding direct contact between the driving member 20 and the drum.

[0066] The rotating member support mechanism 60 includes a fixed member 61, a joint sleeve 62, and a second bearing 63. The joint sleeve 62 is partially located within the storage chamber 31 and is tightly fitted to the drum, thereby achieving a fixed connection between the joint sleeve 62 and the drum, allowing the joint sleeve 62 and the drum to rotate synchronously. The fixed member 61 and the second bearing 63 fitted to the fixed member 61 are mainly used to support the drum. In practical applications, a motor-driven power-outputting drum is usually connected to multiple non-powered sleeves to achieve rational power distribution. For example, when the drum rotates around the rotation axis L, the joint sleeve 62 is fixedly connected to the drum and begins to rotate synchronously. A belt or other connecting member is fitted to the end of the joint sleeve 62 away from the drum, allowing the non-powered sleeve to rotate synchronously, thereby achieving transmission to the object.

[0067] The principle of the drum motor 100 is that the fixing structure of the driving member 20 fixes and supports one end of the driving member 20, and when the driving member 20 outputs power, the power is transmitted to the transmission member 40, and the output shaft 43 of the transmission member 40 rotates the tensioning structure 10. The design of the mounting structure between the position limiting member 12 and the tensioning member 13 generates sufficient friction between the tensioning member 13 and the inner wall of the drum, allowing the tensioning structure 10 to rotate the drum. A drum support structure is designed at the other end of the drum and connected to a non-powered drum, allowing power to be transmitted to multiple non-powered drums.

[0068] The fixing structure of the tensioning structure 10 and the driving member 20 realizes support on both sides of the driving member 20 and the transmission member 40, i.e., support on both sides of the motor and planetary gearbox, which is convenient for installation. It can be seen that if there are needs for different motors and transmission ratios, and the length needs of the motor and planetary gearbox change, the bolts of the tensioning structure 10 can be loosened and its position adjusted to meet the installation needs of motors and planetary gearboxes of various lengths.

[0069] The drum motor 100 uses the frictional force generated between the tensioning structure 10 and the rotating member 30 to achieve a fixed connection, allowing the rotating member 30 to rotate around the rotation axis L. This connection method places low requirements on the shape of the tensioning structure 10, thereby reducing the requirements for processing precision, and solving the technical problems of conventional drum motors, such as the high processing precision required for the connection method between the drum and sleeve and the complicated installation and removal. In addition, by increasing or decreasing the number of tensioning members 13 and mating parts 114, different frictional force requirements can be met, improving applicability.

[0070] The above-mentioned embodiments are merely for explaining the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art may still modify the technical solutions described in the above-mentioned embodiments or equivalently replace some of the technical features therein, and it should be understood that such modifications or replacements will not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and all of them should be included in the protection scope of the present application.

Claims

1. A tension structure used to connect a drive member and a rotating member, which can move the rotating member to rotate around a rotation axis when driven by the drive member, a first connecting member that is power-transmittingly connected to the driving member; a position restriction member including a bottom wall and a side wall provided along the periphery of the bottom wall and having an attachment groove formed therein, the bottom wall being detachably connected to the first connecting member, so that the side wall can be fitted into the first connecting member; a tension member that engages with the mounting groove, the side of which facing away from the first connecting member protruding from the mounting groove, and the tension member that can abut against the rotating member, A tension structure characterized by:

2. The length of the mounting groove is shorter than the length of the tension member along the direction of the pivot axis. The tension structure according to claim 1 , characterized in that

3. A pattern of continuous projections and depressions is provided on the side of the tension member that faces away from the first connection member. The tension structure according to claim 1 , characterized in that

4. the side wall has a plurality of protruding posts provided at intervals, each of the protruding posts has a recessed groove on a side facing the adjacent protruding post, and any one of the recessed grooves and the opposing recessed groove surround the mounting groove having one mounting opening; The tension member has position-regulating protrusions provided on both sides at intervals and engaging with the corresponding recessed grooves, and the tension member can be movably inserted into the mounting grooves through the mounting openings. The tension structure according to claim 1 , characterized in that

5. Along the direction of the rotation axis, the first connecting member includes a first segment and a second segment connected to each other, the diameter of the first segment is smaller than the diameter of the second segment, and a step surface is formed at a connection point between the first segment and the second segment, The side wall is fitted to the first segment, and an end thereof away from the bottom wall abuts against the step surface. The tension structure according to any one of claims 1 to 4, characterized in that

6. the first connecting member further includes a fitting portion that is protruding from an outer wall of the first segment and that includes a first fitting slope; the tension member is slidably connected to the fitting portion, the extension direction of the tension member is inclined with respect to the sliding direction of the tension member, and the tension member includes a second fitting slope that is parallel to the first fitting slope and abuts against the first fitting slope; The tension structure according to claim 5 .

7. a receiving chamber is provided in each of the first segment and the second segment, the first connecting member further includes a connecting portion provided in the receiving chamber, and a through hole is opened in the bottom wall; The tension structure further includes a fastening member that is provided to pass through the through hole and is connected to the connection portion. The tension structure according to claim 5 .

8. The drive mechanism further includes an elastic member and a second connecting member housed in the housing, the elastic member being fitted into the second connecting member and engaging with the second segment, and the second connecting member being used to connect to the output shaft of the drive member. The tension structure according to claim 7 , characterized in that

9. A tension structure according to any one of claims 1 to 8, A drum motor characterized by:

10. the rotating member is a drum, and a storage chamber is provided within the drum; The drum motor further includes a driving member and a transmission member, the driving member, the transmission member and the tensioning structure are all accommodated in the storage chamber and connected in series, and the tensioning member of the tensioning structure abuts against the inner wall of the drum.

10. The drum motor according to claim 9.

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