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 the priority of a Chinese patent application filed with the Chinese Patent Office on February 15, 2023, with the application number 202310151068.9 and the invention title "Tension Structure and Drum Motor", and all of its contents are incorporated herein by reference.

[0002] This application relates to the technical field of conveying equipment, and particularly to a tension structure and a drum motor.

Background Art

[0003] Drum motors are often applied in scenes where various heavy objects are conveyed. Due to the particularity of their usage, they need to withstand large torsions, so the connection strength between the power output part of the driving member and the drum is highly required.

[0004] In the prior art, a method of fitting a drum and a sleeve driven by a motor by interference fit is often adopted. That is, a sleeve with a diameter slightly larger than the inner diameter of the drum is press-fitted by a two-ring, generating a certain radial pressure, so that when an external force acts on the sleeve or the drum, a large frictional force is generated, thereby realizing the fixed connection between the drum and the sleeve. However, in such a connection method, the requirements for the processing accuracy of the sleeve and the drum are high, and it is necessary to process the corresponding two-ring, resulting in high input costs and complicated detachment. [[ID=2二十二]]

Summary of the Invention

Problems to be Solved by the Invention

[0005] The purpose of this application is to provide a tension structure and a drum motor to solve the technical problems in the prior art drum motor that the requirements for the processing accuracy of the connection method between the drum and the sleeve are high and the detachment is complicated.

Means for Solving the Problems

[0006] An embodiment of the first aspect of the present application is a tension structure used to connect a drive member and a rotating member, which is capable of moving the rotating member to rotate around a pivot axis by the drive of the drive member, A first connecting member that is power-transmitted to the aforementioned drive member, A position regulating member comprising a bottom wall and a side wall provided along the periphery of the bottom wall and having a mounting groove, wherein the bottom wall is removably connected to the first connecting member, and the side wall is fitted onto the first connecting member, The present invention provides a tension structure comprising a tension member that engages with the mounting groove, has a side that moves away from the first connecting member protruding from the mounting groove, and is capable of contacting the rotating member.

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

[0008] In one embodiment, the side of the tension member that is separated from the first connecting member is provided with a pattern of continuous bumps and dips.

[0009] In one embodiment, the side wall is provided with a plurality of convex columns that are spaced apart, and a groove is provided on the side of each convex column facing the adjacent convex column, and one of the grooves and the opposing grooves surround a mounting groove having a single mounting opening. The tension member is provided on both sides at intervals and has position-regulating projections that engage with the corresponding grooves, and the tension member is movably inserted into the mounting grooves via the mounting openings.

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

[0011] In one embodiment, the first connecting member further comprises a fitting portion that protrudes from the outer wall of the first segment and has a first fitting inclined surface, The tension member is slidably connected to the fitting portion and is provided such that its extension direction is inclined with respect to the sliding direction of the tension member, and is parallel to the first fitting inclined surface and abuts against it.

[0012] In one embodiment, both the first segment and the second segment are provided with a housing chamber, the first connecting member further comprises a connecting portion provided within the housing chamber, and a through hole is provided in the bottom wall. The tension structure further comprises a fastening member that penetrates the through hole and is connected to the connecting portion.

[0013] In one embodiment, the tension structure further comprises an elastic member housed in the housing chamber and a second connecting member, wherein the elastic member is fitted onto 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 drive member.

[0014] The above tension structure comprises a first connecting member, a position regulating member, and a tension member. The first connecting member is electrically connected to a drive member and rotates around a pivot axis. The bottom wall of the position regulating member is detachably connected to the first connecting member. The tension member engages with a mounting groove on the side wall of the position regulating member. As a result, both the tension member and the position regulating member can rotate around the pivot axis in conjunction with the first connecting member, and the tension member and the position regulating member can be easily attached and detached. Furthermore, since the side of the tension member away from the first connecting member protrudes from the mounting groove and can contact the rotating member, the tension member generates a reliable frictional force between itself and the rotating member to achieve a fixed connection, allowing the rotating member to move to rotate around its pivot axis. Because the requirements for the shape of the tension structure are low in this connection method, the requirements for machining accuracy are reduced, solving the technical problems of conventional drum motors, where the connection method between the drum and sleeve requires high machining accuracy and is complicated to attach and detach.

[0015] An embodiment of the second aspect of the present application provides a drum motor comprising the tension structure described in any embodiment of the first aspect.

[0016] In one embodiment, the rotating member is a drum, and a storage chamber is provided inside the drum. The drum motor further comprises a drive member and a transmission member, the drive member, the transmission member and the tension structure are all housed in the storage chamber and connected sequentially, and the tension member of the tension structure abuts against the inner wall of the drum.

[0017] The above drum motor realizes fixed connection by the frictional force generated between the tension structure and the rotating member, and can move the rotating member to rotate around the rotation axis. In such a connection method, the requirement for the shape of the tension structure is low, so the requirement for processing accuracy is reduced, solving the technical problems in the conventional drum motor that the requirement for the processing accuracy of the connection method between the drum and the sleeve is high and the attachment and detachment are complicated. In addition, by increasing or decreasing the number of tension members and fitting parts, different needs for frictional force can be satisfied, and the applicability can be improved.

Brief Description of the Drawings

[0018] To more clearly explain the technical solutions in the embodiments of the present application, the drawings that need to be used in the following description of the embodiments or the prior art are briefly introduced below. The drawings in the following description are only some embodiments of the present application. It is obvious that for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

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

Explanation of Signs

[0020] 100··· Drum motor, 10··· Tension structure, 11··· First connection member, 111··· First segment, 112··· Second segment, 113··· Step surface, 114··· Fitting part, 1141··· First fitting inclined surface, 115··· Accommodation chamber, 116··· Connection part, 12··· Position restricting member, 121··· Bottom wall, 122··· Side wall, 1221··· Convex column, 123··· Mounting groove, 124··· Mounting hole, 13··· Tension member, 131··· Position restricting protrusion, 132··· Second fitting inclined surface, 14··· Tightening member, 15··· Elastic member, 16··· Second connection member, 20··· Drive member, 21··· Motor internal 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 connection member, 53··· Motor connection fitting member, 60··· Drum support mechanism, 61··· Fixing member, 62··· Joint sleeve, 63··· Second bearing.

Embodiments for Carrying out the Invention

[0021] To make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in connection with the drawings and embodiments. It should be understood that the specific embodiments described here are only for interpreting the present application and not for limiting the present application.

[0022] When an element is said to be "fixed to" another element, or "provided to" another element, it may be directly located on the other element or indirectly located on the other element. When an element is said to be "connected" to another element, it may be directly connected to the other element or indirectly connected to the other element.

[0023] Furthermore, the directions or positional relationships indicated by terms such as "length," "width," "top," "bottom," "inside," and "outside" are based on the directions or positional relationships shown in the drawings and are merely for the purpose of facilitating and simplifying the explanation of this application. They do not indicate or imply that such devices or elements must have a specific direction, or must be configured and operated in a specific direction, and should not be understood as limiting this application. In the description of this application, unless otherwise clearly and specifically limited, the meaning of "multiple" is two or more.

[0024] In this application, unless otherwise explicitly provided and limited, terms such as "attach," "connect," and "fix" should be understood in a broad sense. For example, they may be fixed connections, removable connections, or integrated, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate mediator, or internal communication between two elements or an interaction between two elements. A person skilled in the art will understand the specific meaning of these terms in this application depending on the specific circumstances.

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

[0026] Referring to Figures 1 to 4, in one embodiment of the present invention, the tension structure 10 is capable of moving the rotating member 30 to rotate around the rotation axis L by the drive of the drive member 20, wherein the rotation axis L coincides 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 transmitted to the drive member 20. Specifically, the first connecting member 11 is transmitted to the output end of the drive member 20, and since the output end of the drive member 20 rotates around the rotation axis L, the first connecting member 11 can also be moved to rotate around the rotation axis L.

[0028] The position regulating member 12 comprises a bottom wall 121 and a side wall 122 provided along the periphery of the bottom wall 121. An attachment groove 123 is provided in the side wall 122, and the bottom wall 121 is removably connected to the first connecting member 11, so that the side wall 122 can be fitted onto the first connecting member 11.

[0029] The tension member 13 engages with the mounting groove 123, with the side away from the first connecting member 11 protruding from the mounting groove 123 and capable of contacting 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 regulating member 12 can be connected to the first connecting member 11 by a locking connection or a screw connection, making it easy to attach and detach, and the position regulating member 12 can rotate around the pivot axis L in conjunction with the first connecting member 11. Since the tension member 13 engages with the mounting groove 123 located on the side wall 122, when the side wall 122 of the position regulating member 12 is fitted onto the first connecting member 11, the tension member 13 rotates around the pivot axis L in conjunction with the first connecting member 11. Furthermore, since the side of the tension member 13 that is separated from the first connecting member 11 protrudes from the mounting groove 123 and can contact the rotating member 30, the tension member 13 is fixedly connected to the rotating member 30, and the tension structure 10 simultaneously performs the functions of transmitting power and providing support for driving the transmission member 40. In other words, the tension structure 10 moves the rotating member 30 and causes it to rotate around the rotation axis L.

[0031] It can be understood that a fixed connection is achieved by generating a reliable frictional force between the tension member 13 and the rotating member 30.

[0032] In this embodiment, the rotating member 30 is a drum, and it can be understood that in other embodiments of the present application, the rotating member 30 may be a structure such as a belt wound around the tension structure 10.

[0033] The tension structure 10 described above comprises a first connecting member 11, a position regulating member 12, and a tension member 13. The first connecting member 11 is electrically connected to a drive member 20 and rotates around a pivot 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 a mounting groove 123 in the side wall 122 of the position regulating member 12. Thus, both the tension member 13 and the position regulating member 12 can rotate around the pivot axis L in conjunction with the first connecting member 11, and the tension member 13 and the position regulating member 12 can be easily attached to and detached from each other. Furthermore, since the side of the tension member 13 that moves away from the first connecting member 11 protrudes from the mounting groove 123 and can contact the rotating member 30, the tension member 13 generates a reliable frictional force between itself and the rotating member 30, achieving a fixed connection and allowing the rotating member 30 to move so as to rotate around the rotation axis L. In this connection method, the requirements for the shape of the tension structure 10 are low, thus reducing the requirements for machining accuracy and solving the technical problems of conventional drum motors, where the connection method between the drum and sleeve has high machining accuracy requirements and is complicated to attach and detach.

[0034] Referring to Figures 1, 3 to 5, in one embodiment of the present invention, the length of the mounting groove 123 along the direction of the rotation axis L is shorter 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 rotation member 30, and ensuring the stability of the connection with the rotation member 30.

[0035] In other embodiments of the present invention, the length of the mounting groove 123 may be the same as the length of the tension member 13 along the direction of the rotation axis L, and it is understood that increasing the roughness of the tension member 13 on the side facing the rotation member 30 increases the radial pressure on the rotation member 30, and this is not limited here.

[0036] To provide a stable friction effect, with reference to Figures 3 and 4, in one embodiment of the present invention, a continuous pattern of irregularities is provided on the side of the tension member 13 away from the first connecting member 11. In other words, the surface of the tension member 13 away from the first connecting member 11 is a rough surface. The continuous pattern of irregularities increases the surface roughness of the tension member 13, increases the radial pressure of the tension member 13 on 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 resistant to deformation during prolonged pressing processes, and provides a stable connection. 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 of this invention.

[0038] Furthermore, there are multiple mounting grooves 123 in the side wall 122, and these mounting grooves 123 are uniformly distributed along the circumferential direction of the side wall 122. Correspondingly, there are multiple tension members 13, and they are placed within the corresponding mounting grooves 123.

[0039] In other embodiments of the present application, the number of tension members 13 may be different, and it can be understood that the number of tension members 13 can be increased or decreased depending on the frictional force requirements. Alternatively, in another embodiment of the present application, the structure of the tension members 13 may be different, for example, the tension members 13 may be annular in shape as a whole, and accordingly, a mounting groove 123 is provided annularly on the outer circumferential surface of the first connecting member 11. In this case, the radial pressure of the tension members 13 on the rotating member 30 can be changed by replacing tension members 13 of different annular widths, and accordingly, to ensure the stability of the connection between the tension members 13 and the first connecting member 11, it is necessary, but not limited to, replacing the first connecting member 11 having a size corresponding to the mounting groove 123 when replacing tension members 13 of different annular widths.

[0040] Referring to Figures 3 to 5, in one embodiment of the present invention, the side wall 122 is provided with a plurality of spaced-apart protrusions 1221, and a groove is provided on the side of each protrusion 1221 facing the adjacent protrusion 1221, and one groove and the opposing groove surround a mounting groove 123 having one mounting opening 124. The tension member 13 is provided with position-regulating projections 131 spaced apart on both sides, and the position-regulating projections 131 engage with the corresponding grooves, so that the tension member 13 can be movably inserted into the mounting groove 123 via the mounting opening 124. In this way, the grooves act as mounting guides and position-regulating forces for the position-regulating projections 131 housed therein, increasing the stability of the connection between the tension member 13 and the position-regulating member 12, reducing the risk of the tension member 13 falling off, and making it easy to attach and detach.

[0041] It is understood that the tension member 13 should be installed before assembling the position regulating member 12 and the first connecting member 11.

[0042] In other embodiments of the present invention, the structure of the position-regulating member 12 may be different. For example, there may be differences in the groove shape of each convex column 1221 that faces different adjacent convex columns 1221, and correspondingly, the shapes of the opposing sides of the tension member 13 may also be different. In this way, the mounting direction of the tension member 13 can be restricted, 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] Referring to Figures 3 to 5, in one embodiment of the present invention, the first connecting member 11 comprises 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 being smaller than the diameter of the second segment 112, a step surface 113 formed at the connection point between the first segment 111 and the second segment 112, the side wall 122 being fitted into the first segment 111 and the end away from the bottom wall 121 abutting against the step surface 113. In this way, when assembling the position regulating member 12 and the first connecting member 11, the step surface 113 can regulate the position of the mounting of the position regulating member 12, preventing the position regulating member 12 and the first connecting member 11 from being connected too tightly or not being connected in the predetermined position, and ensuring that the amount of frictional resistance between the tension member 13 and the rotating member 30 is appropriate.

[0044] In this embodiment, referring to Figures 3 to 6, the first connecting member 11 further comprises a fitting portion 114 that protrudes from the outer wall of the first segment 111, and the fitting portion 114 comprises a first fitting inclined surface 1141. The tension member 13 is slidably connected to the fitting portion 114 and comprises a second fitting inclined surface 132, the extension direction of the second fitting inclined surface 132 is inclined with respect to the sliding direction of the tension member 13, the second fitting inclined surface 132 is parallel to and abuts against the first fitting inclined surface 1141. In other words, the extension direction of the first fitting inclined surface 1141 is similarly inclined with respect to the sliding direction of the tension member 13.

[0045] Thus, the second fitting inclined surface 132 abuts against the first fitting inclined surface 1141, and due to the pushing of an external force, the tension member 13 can slide slightly along the first fitting inclined surface 1141 at the fitting portion 114. Because the first fitting inclined surface 1141 is an inclined surface, the tension member 13 is pressed during the movement process, increasing the pressure against the inner wall of the rotating member 30, and the frictional force generated by the rough surface causes the rotating member 30 to rotate. Furthermore, by providing multiple tension blocks and fitting 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 is provided with a plurality of fitting portions 114, which are uniformly distributed along the axial direction of the first segment 111 and adapted to the plurality of tension members 13. As the tension members 13 are uniformly distributed along the axial direction, the radial pressure of the tension structure 10 on the rotating member 30 is uniformly distributed, and the connection between the first connecting member 11 and the rotating member 30 is stable. Along the sliding direction of the tension member 13, the height of the fitting portion 114 from the end near the bottom wall 121 to the end near the second segment 112 of the fitting portion 114 gradually increases.

[0048] Furthermore, the position-regulating projection 131 and the second fitting inclined surface 132 of the tension member 13 surround each other to form a single sliding groove, and the fitting portion 114 can be accommodated within the sliding groove. Therefore, when attaching the position-regulating member 12 and the tension member 13, the sliding connection between the fitting portion 114 and the sliding groove provides a guiding action, regulating the position of the tension member 13 and ensuring accurate attachment.

[0049] Referring to Figures 1 to 5, in one embodiment of the present invention, a housing chamber 115 is provided in both the first segment 111 and the second segment 112, the first connecting member 11 further comprises a connecting portion 116 provided in the housing chamber 115, a through hole is provided in the bottom wall 121, and the tension structure 10 further comprises a fastening member 14, the fastening member 14 is provided through the through hole and connected to the connecting portion 116. In this way, the position regulating member 12 can be fixed by the connection between the fastening member 14 and the connecting portion 116, thereby achieving the fixing of the tension member 13.

[0050] Of these, the length of the tension member 13 is slightly greater than the length of the fitting portion 114. In this embodiment, the fastening member 14 is provided through the through hole and is screwed into the connecting portion 116, and the fastening member includes a bolt and a nut. In this way, a simple connection structure can be realized by screwing the bottom wall 121 and the connecting portion 116, and attachment and detachment are convenient. When the tension structure 10 is installed, tightening the bolt and nut causes the bottom wall 121 to press against the tension member 13, and the tension member 13 moves along the fitting portion 114 toward the direction away from the first connecting member 11 due to the pressure from the bottom wall 121, that is, it moves along the vertical direction. Because the first fitting inclined surface 1141 is an inclined surface, as the tension member 13 moves toward the horizontal direction, it is pressed and the pressure on the rotating member 30 increases, and the frictional force generated by the rough surface causes the rotating member 30 to rotate.

[0051] Furthermore, the first segment 111, the second segment 112, the mating portion 114, and the connecting portion 116 are integrally molded, resulting in a simple manufacturing process, easy installation, and easy replacement in a timely manner.

[0052] In other embodiments of the present invention, the structure of the fastening member 14 may be other than those described above. For example, the fastening member 14 can be fixed by a locking connection or the like, and is not limited thereto.

[0053] Referring to Figures 2 to 5, in one embodiment of the present invention, the tension structure 10 further comprises an elastic member 15 and a second connecting member 16 housed in a housing chamber 115, the elastic member 15 being fitted onto 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 drive member 20. In this way, the elastic member 15 performs a vibration damping effect, preventing 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 by a plurality of protrusions and recesses, thereby ensuring that the relative positions of the second connecting member 16, the elastic member 15, and the second segment 112 do not change. In this case, the drive member 20 connected to the second connecting member 16 can move the first connecting member 11 to rotate around the pivot axis L.

[0055] Specifically, the elastic member 15 has an attachment passage, and the outer surface of the second connecting member 16 conforms to the shape of the attachment passage. Multiple protrusions are provided on the outer surface of the elastic member 15, and multiple grooves that conform to the protrusions are provided on the inner wall of the second segment 112, thereby achieving a fixed connection between the elastic member 15 and the second segment 112 and restricting relative rotation between the elastic member 15 and the second segment 112. It is understood that in other embodiments of the present invention, the shapes of the second connecting member 16, the elastic member 15, and the inner walls of the second segment 112 may be other, and this is not limited here.

[0056] The tension structure 10 described above comprises a first connecting member 11, a position regulating member 12, and a tension member 13. The first connecting member 11 is electrically connected to a drive member 20 and rotates around a pivot 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 a mounting groove 123 in the side wall 122 of the position regulating member 12. Thus, both the tension member 13 and the position regulating member 12 can rotate around the pivot axis L in conjunction with the first connecting member 11, and the tension member 13 and the position regulating member 12 can be easily attached to and detached from each other. Furthermore, since the side of the tension member 13 that moves away from the first connecting member 11 protrudes from the mounting groove 123 and can contact the rotating member 30, the tension member 13 generates a reliable frictional force between itself and the rotating member 30, achieving a fixed connection and allowing the rotating member 30 to move so as to rotate around the rotation axis L. In this connection method, the requirements for the shape of the tension structure 10 are low, thus reducing the requirements for machining accuracy and solving the technical problems of conventional drum motors, where the connection method between the drum and sleeve requires high machining accuracy and is complicated to attach and detach. In addition, by increasing or decreasing the number of tension members 13 and fitting parts 114, different needs for frictional force can be met and applicability can be improved.

[0057] An embodiment of the second aspect of the present application provides a drum motor comprising the tension structure of any embodiment of the first aspect.

[0058] Referring to Figures 1 to 3, in one embodiment of the present invention, the rotating member 30 is a drum, and a storage chamber 31 is provided inside the drum. The drum motor 100 further comprises a drive member 20 and a transmission member 40, and the drive member 20, the transmission member 40 and the tension structure 10 are all housed in the storage chamber 31 and connected in sequence, and the tension member 13 of the tension structure 10 abuts against the inner wall of the drum, so that the tension structure 10 can be moved to rotate the drum by the drive of the drive member 20.

[0059] It can be seen that neither the drive member 20 nor the transmission member 40 are in direct contact with the drum. When the drive member 20, the transmission member 40, and the tension structure 10 are all housed in the storage chamber 31, the space occupied by the drum motor 100 can be saved.

[0060] Of these, the transmission member 40 is a planetary gearbox, and referring to Figures 2, 3 and 7, the transmission member 40 comprises a housing 41 having a ring gear, a reduction member 42 located inside 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 drive member 20, a plurality of planetary gears 422 provided on the circumferential side of the sun gear 421, and a planetary gear carrier 423. Each planetary gear 422 meshes with the sun gear 421 and the ring gear, and all of the plurality of planetary gears 422 are rotatably connected to the planetary gear carrier 423. The output shaft 43 is provided on the side of the planetary gear carrier 423 away from the drive member 20 and can rotate synchronously with the planetary gear carrier 423.

[0061] Specifically, multiple straight shafts 424 are provided through the planetary gear carrier 423, and each planetary gear 422 is fitted onto the corresponding straight shaft 424. 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 wall of the planetary gear 422 and the straight shaft 424. This changes the sliding friction between the planetary gear 422 and the straight shaft 424 during rotation to rolling friction, significantly increasing power transmission efficiency, reducing friction noise, and extending the life of the gearbox.

[0062] Furthermore, the transmission member 40 further includes a first bearing 44 fitted onto the output shaft 43, the inner ring of the first bearing 44 is provided with a position regulating groove, and an annular elastic ring 45 is provided within the position regulating groove, the annular elastic ring 45 can be fitted onto the output shaft 43 and also serves to eliminate gaps in the radial direction.

[0063] It is understood that in other embodiments of the present invention, a position regulating groove may be provided on the output shaft 43, and this is not a limitation here.

[0064] In this embodiment, referring to Figures 2, 3, 8, and 9, the drum motor 100 further comprises a drive member fixing mechanism 50 and a rotation member support mechanism 60. The drive member fixing mechanism 50 is located at the first end of the rotation member 30, with a portion extending outside the storage chamber 31, and is used to fix and support the end of the drive member 20 that is away from the transmission member 40. The rotation member support mechanism 60 is located at the second end of the rotation member 30, with a portion extending outside the storage chamber 31, and is used to provide support to the rotation member 30.

[0065] Specifically, the drive member 20 is a motor and includes a motor internal tooth housing 21. The drive member fixing mechanism 50 includes a motor fixing member 51, a motor connecting member 52, and a motor connecting fitting member 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 flattened position, thereby ensuring that the motor connecting member 52 cannot rotate. The motor connecting member 52 and the motor connecting fitting member 53 are fitted together by a plurality of protrusions and recesses, thereby achieving fixation to the motor connecting fitting member 53. The motor connecting member 52 has a certain elastic force, which cancels out some of the influence of external forces from the motor fixing member 51, prevents external forces such as vibrations received by the motor fixing member 51 from being transmitted to the motor, and can achieve vibration damping. Furthermore, since the motor connection fitting member 53 and the motor internal tooth housing 21 are connected by splines, the motor itself is fixed by the motor fixing member 51 and is guaranteed not to rotate, thereby avoiding direct contact between the drive member 20 and the drum.

[0066] Furthermore, the rotating member support mechanism 60 includes a fixed member 61, a joint sleeve 62, and a second bearing 63. Part of the joint sleeve 62 is located within the storage chamber 31 and is fitted to the drum by a pressure fit, enabling a fixed connection between the joint sleeve 62 and the drum, thus 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 provide support to the drum. In actual applications, a rational distribution of power is usually achieved by connecting multiple unpowered sleeves to one drum that outputs power with a motor. For example, when the drum rotates around the rotation axis L, the joint sleeve 62 is fixedly connected to the drum and moves to begin rotating synchronously. By fitting a belt or other connecting member to the end of the joint sleeve 62 that is away from the drum, the unpowered sleeves can be moved to rotate synchronously, thereby achieving power transmission to an object.

[0067] The principle of the drum motor 100 described above is that the fixed structure of the drive member 20 provides fixation and support to one end of the drive member 20, and when the drive member 20 outputs power, the power is transmitted to the transmission member 40, and the output shaft 43 of the transmission member 40 moves the tension structure 10 to rotate. Due to the design of the mounting structure between the position regulating member 12 and the tension member 13, sufficient frictional force is generated between the tension member 13 and the inner wall of the drum, so that the tension structure 10 can move the drum to rotate. By designing a drum support structure at the other end of the drum and connecting it to a drum without power, power can be transmitted to multiple drums without power.

[0068] The tension structure 10 and the fixing structure of the drive member 20 provide support on both sides of the drive member 20 and the transmission member 40, i.e., support on both sides of the motor and planetary gearbox, making installation convenient. It can be understood that if there are different motor and transmission ratio needs, and the motor and planetary gearbox length needs change, the bolts of the tension structure 10 can be loosened and its position adjusted to accommodate the mounting needs of motors and planetary gearboxes of various lengths.

[0069] The drum motor 100 achieves a fixed connection through the frictional force generated between the tension structure 10 and the rotating member 30, allowing the rotating member 30 to rotate around the rotation axis L. Because this connection method has low requirements for the shape of the tension structure 10, it reduces the requirements for machining accuracy, solving the technical problems of conventional drum motors, which have high machining accuracy requirements and complicated attachment / detachment procedures for the drum and sleeve connection method. Furthermore, by increasing or decreasing the number of tension members 13 and fitting parts 114, different needs for frictional force can be met, improving applicability.

[0070] The embodiments described above are merely for illustrative purposes and not to limit the technical proposal of the present application. While the present application has been described in detail with reference to the embodiments described above, those skilled in the art can still modify the technical proposals described in the embodiments described above, or replace some of their technical features equally. Such modifications or replacements should not cause the essence of the corresponding technical proposal to deviate from the spirit and scope of the technical proposals in the embodiments of the present application, and should all be considered within the scope of protection of the present application.

Claims

1. A tension structure used to connect a drive member and a rotating member, which allows the rotating member to be moved to rotate around a rotation axis by the drive of the drive member, A first connecting member that is power-transmitted to the aforementioned drive member, A position regulating member comprising a bottom wall and a side wall provided along the periphery of the bottom wall and having an attachment groove, wherein the bottom wall is removably connected to the first connecting member, and the side wall is fitted into the first connecting member, A tension member is provided which engages with the mounting groove, the side away from the first connecting member protrudes from the mounting groove, and is capable of contacting the rotating member. The side wall is provided with a plurality of convex columns that are spaced apart, and a groove is provided on the side of each convex column facing the adjacent convex column, and one of the grooves and the opposing groove surround each other to form a mounting groove having a single mounting opening. The tension member is provided on both sides at intervals and has position-regulating projections that engage with the corresponding grooves, and the tension member is movably inserted into the mounting groove via the mounting opening. A tension structure characterized by the following features.

2. Along the direction of the pivot axis, the length of the mounting groove is less than the length of the tension member. The tension structure according to feature 1.

3. The side of the tension member that is separated from the first connecting member is provided with a pattern of continuous bumps and ridges. The tension structure according to feature 1.

4. Along the direction of the rotation axis, the first connecting member comprises a first segment and a second segment connected to each other, the diameter of the first segment being smaller than the diameter of the second segment, and a step surface formed at the connection point between the first segment and the second segment. The side wall is fitted into the first segment, and the end that is separated from the bottom wall abuts against the step surface. The tension structure according to feature 1.

5. The first connecting member further comprises a fitting portion that protrudes from the outer wall of the first segment and has a first fitting inclined surface, The tension member is connected to the fitting portion by sliding, and is provided such that its extension direction is inclined with respect to the sliding direction of the tension member, and is parallel to the first fitting inclined surface and abuts against it, The tension structure according to feature 4.

6. Both the first segment and the second segment are provided with a housing chamber, the first connecting member further comprises a connecting portion provided within the housing chamber, and a through hole is provided in the bottom wall. The tension structure further comprises a fastening member that penetrates the through hole and is connected to the connecting portion. The tension structure according to feature 4.

7. The enclosure further comprises an elastic member and a second connecting member, the elastic member being fitted onto 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 feature 6.

8. A tension structure comprising the one described in any one of claims 1 to 7, A drum motor characterized by the following features.

9. The rotating member is a drum, and a storage chamber is provided inside the drum. The drum motor further comprises a drive member and a transmission member, the drive member, the transmission member and the tension structure are all housed in the storage chamber and connected sequentially, and the tension member of the tension structure abuts against the inner wall of the drum. The drum motor according to feature 8.

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