A dual tail wheel damping assembly

Abstract

The application provides a double-tail wheel damping assembly, which comprises a buffer assembly, and the buffer assembly at least comprises a shell, one end of the shell is provided with a tail connecting piece, and a tail wheel hanger is detachably arranged on the tail connecting piece; a first pulley is arranged on the tail connecting piece, and a second pulley is arranged on the tail wheel hanger. The detachable connection mode of the tail connecting piece and the tail wheel hanger enables the double-tail wheel damping assembly to be matched with a slide rail for installation and disassembly under the condition that the slide rail is complete, guarantees the structural strength of the slide rail, and is convenient to use and higher in safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hardware fittings, in particular to a double-tail-wheel damping assembly. BACKGROUND

[0002] A sliding door, also known as a sliding door, is a sliding connection between the door leaf and the door frame. The opening or closing of the door is achieved by the horizontal movement of the door leaf. It can save space to a certain extent and is widely used. In order to reduce the impact and collision between the door leaf and the door frame, a damping assembly is usually used to assist the opening or closing of the door leaf, which can effectively absorb the impact of the door leaf on the door frame. However, due to the limitation of the overall width of the damping assembly (mainly the two sides of the pulley), the installation of the damping assembly is difficult. The conventional method is to open a maintenance opening on the slide rail to solve the above problem, but the machining precision of the maintenance opening is high, which undoubtedly increases the processing cost.

[0003] A Chinese patent with publication number CN216043246U discloses a buffer hanging wheel that can be quickly replaced without leaving a maintenance opening. It includes a slide rail, a sliding bracket, and a roller set. The end of the sliding bracket is provided with a butt joint block. The roller set is movably hinged to the butt joint block to assemble the roller set and the sliding bracket into a whole. The slide rail includes a main slide rail and a slide rail head. The main slide rail and the slide rail head are in a separated structure. The sliding bracket and the roller set slide in the main slide rail, and the roller set is close to the sliding head relative to the sliding bracket. The structure of the above-mentioned patent is simple, and the replacement of the buffer hanging wheel can be realized without opening a maintenance opening.

[0004] However, the scheme of separating the slide rail in the above-mentioned patent destroys the integrity of the slide rail and weakens the strength of the slide rail. At the same time, the assembly precision of the main slide rail and the slide rail head is required to be high, otherwise it will affect the smoothness of the roller rolling in the slide rail and the user experience. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide a double-tail-wheel damping assembly. The tail connecting piece and the tail wheel hanger provided thereby can be detached, so that the double-tail-wheel damping assembly can be installed and detached with the slide rail in a complete state, thereby ensuring the structural strength of the slide rail.

[0006] The embodiments of the present application are implemented by the following technical solutions:

[0007] A double-tail-wheel damping assembly includes a damping assembly, the damping assembly at least includes a shell, one end of the shell is provided with a tail connecting piece, and a tail wheel hanger is detachably arranged on the tail connecting piece; a first pulley is arranged on the tail connecting piece, and a second pulley is arranged on the tail wheel hanger.

[0008] According to a preferred embodiment, the shell and the tail connecting piece are detachably connected.

[0009] According to a preferred embodiment, the tail connecting piece comprises a main body; the main body is provided with a clamping blind hole and a fixing hole in communication with each other; the tail wheel hanger is provided with an extension protrusion matched with the clamping blind hole, and the extension protrusion is provided with a positioning screw hole; when the extension protrusion is embedded in the clamping blind hole, the fixing hole can be coaxial with the positioning screw hole.

[0010] According to a preferred embodiment, the tail connecting piece comprises a main body, and the other end of the main body is provided with an inner joint block extending into the shell and fixedly connected with the shell.

[0011] According to a preferred embodiment, the inner joint block is provided with at least two inner pin holes; and the side wall of the shell is provided with at least two outer pin holes corresponding to the at least two inner pin holes one by one.

[0012] According to a preferred embodiment, the tail wheel hanger is provided with a clamping block, and the tail connecting piece is provided with a clamping groove matched with the clamping block; the clamping block is slidingly embedded in the clamping groove; and the clamping block is configured to be able to be separated from the clamping groove only in a sliding manner along the extension direction of the clamping groove.

[0013] According to a preferred embodiment, the clamping groove is a trapezoidal groove.

[0014] According to a preferred embodiment, the clamping block is arranged on the inner side surface of the tail wheel hanger, and a displacement slot is formed in the clamping block, the extension direction of the displacement slot being parallel to the extension direction of the clamping groove; the bottom of the clamping groove is provided with a protruding strip; and when the clamping block is embedded in the clamping groove, the protruding strip extends into the displacement slot.

[0015] According to a preferred embodiment, a rolling groove a is arranged around the periphery of the first pulley, and a rolling groove b is arranged around the periphery of the second pulley; the width of the rolling groove a is greater than the width of the rolling groove b, or the width of the rolling groove b is greater than the width of the rolling groove a.

[0016] According to a preferred embodiment, the tail wheel hanger is provided with a second auxiliary hole.

[0017] The technical scheme of the embodiment of the present application has at least the following advantages and beneficial effects:

[0018] The present application has a simple structure, and the detachable connection of the tail connecting piece and the tail wheel hanger enables the double-tail-wheel damping assembly to be installed and detached with the slide rail in an intact state, thereby ensuring the structural strength of the slide rail and being more secure for use. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and other related drawings can also be obtained by those of ordinary skill in the art without any creative effort based on these drawings.

[0020] Figure 1 The structural schematic diagram of the double-tail-wheel damping assembly provided by the embodiments of the present application is shown in the figure.

[0021] Figure 2 The first three-dimensional structural schematic diagram of the hanger suspension pulley provided by the embodiments of the present application is shown in the figure.

[0022] Figure 3 The second three-dimensional structural schematic diagram of the hanger suspension pulley provided by the embodiments of the present application is shown in the figure.

[0023] Figure 4 The left-view structural schematic diagram of the hanger suspension pulley provided by the embodiments of the present application is shown in the figure.

[0024] Figure 5 The exploded structural schematic diagram of the hanger suspension pulley provided by the embodiments of the present application is shown in the figure.

[0025] Figure 6 The structural schematic diagram of the second hanger provided by the embodiments of the present application is shown in the figure. Figure 5

[0026] Figure 7 The structural schematic diagram of the first hanger provided by the embodiments of the present application is shown in the figure.

[0027] Figure 8 The structural schematic diagram of the first hanger provided by the embodiments of the present application is shown in the figure.

[0028] Figure 9 The three-dimensional structural schematic diagram of the tail-wheel assembly provided by the embodiments of the present application is shown in the figure.

[0029] Figure 10 The right-view structural schematic diagram of the tail-wheel assembly provided by the embodiments of the present application is shown in the figure.

[0030] Figure 11 The three-dimensional structural schematic diagram of the tail-wheel hanger provided by the embodiments of the present application is shown in the figure.

[0031] Figure 12 The three-dimensional structural schematic diagram of the tail-wheel hanger provided by the embodiments of the present application is shown in the figure.

[0032] Figure 13 The axial cross-sectional schematic diagram of the sliding rail is shown in the figure.

[0033] Figure 14 The assembly schematic diagram of the double-tail-wheel damping assembly and the sliding rail provided by the embodiments of the present application is shown in the figure. ​

[0034] Figure 15 The assembly diagram of the hanger hoisting pulley and the slide rail is provided for the embodiment of the present application.

[0035] Icon: 1 - shell, 11 - connector, 12 - fixing bolt, 2 - hanger hoisting pulley, 21 - first hanger, 211 - mounting ear, 2111 - through hole, 212 - third pulley, 213 - first reinforcing block, 214 - extension plate, 2141 - second hoisting screw hole, 215 - guide block, 216 - first screw hole, 22 - second hanger, 221 - second reinforcing block, 222 - fourth pulley, 223 - second screw hole, 224 - first auxiliary hole, 225 - guide groove, 23 - first hoisting screw hole, 231 - second half screw hole, 232 - first half screw hole, 24 - plugging block, 25 - mounting plate, 251 - brush, 26 - first locking screw, 27 - mounting blind hole, 28 - extension groove, 3 - tail wheel assembly, 31 - tail connecting piece, 311 - main body, 3111 - fixing hole, 3112 - clamping blind hole, 312 - external connecting block, 3121 - clamping groove, 313 - internal connecting block, 3131 - internal pin hole, 314 - first pulley, 3141 - convex strip, 3142 - rolling groove a, 32 - tail wheel hanger, 321 - second auxiliary hole, 322 - second pulley, 3221 - rolling groove b, 323 - clamping block, 3231 - accommodation groove, 324 - extension protrusion, 3241 - positioning screw hole, 33 - second locking screw, 4 - slide rail, 41 - sliding groove, 42 - track, 5 - hexagonal wrench, 6 - hoisting piece. DETAILED DESCRIPTION

[0036] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0037] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0039] Please refer to Figures 1 to 15 A double-tail wheel damping assembly includes a buffer assembly, such asFigure 1 and Figure 14 As shown, a tail wheel assembly 3 is detachably mounted on the buffer assembly. The tail wheel assembly 3 includes a tail connector 31 connected to the buffer assembly, and a tail wheel bracket 32 ​​is detachably mounted on the tail connector 31. A first pulley 314 is disposed on the tail connector 31, and a second pulley 322 is disposed on the tail wheel bracket 32. In this embodiment, the buffer assembly includes at least a housing 1, and the tail connector 31 is detachably mounted on one end of the housing 1. In this embodiment, the tail wheel assembly 3 is composed of the tail connector 31 and the tail wheel bracket 32, so that in use, the tail connector 31 can be fixedly installed to the housing 1 first, and then, with the housing 1 as a support, the tail connector 31 can be inserted into the slide rail 4 from the slide groove 41, so that the first pulley 314 can be connected to the track 42. The tail wheel bracket 32 ​​is then inserted into the slide rail 4 from the slide groove 41, and driven to move along the track 42 towards the tail connector 31 until the tail wheel bracket 32 ​​and the tail connector 31 can be connected. Finally, the two are fixedly connected. Correspondingly, during disassembly, the fixing parts between the two are first removed, then the two are separated in the extension direction of the track 42, and then they are removed one by one through the slide groove 41.

[0040] The tail wheel assembly 3 here enables the dual tail wheel damping assembly to be installed and disassembled with the slide rail 4 while the slide rail 4 is intact, ensuring the structural strength of the slide rail 4, making it easier to use and safer.

[0041] Furthermore, such as Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, the tail connector 31 includes a main body 311; the main body 311 is provided with a connecting blind hole 3112 and a fixing hole 3111 that are interconnected; the tail wheel bracket 32 ​​is provided with an extension protrusion 324 that is adapted to the connecting blind hole 3112, and the extension protrusion 324 is provided with a positioning screw hole 3241; when the extension protrusion 324 is embedded in the connecting blind hole 3112, the fixing hole 3111 can be coaxial with the positioning screw hole 3241. In this embodiment, when the extension protrusion 324 is embedded in the connecting blind hole 3112 and the fixing hole 3111 is coaxial with the positioning screw hole 3241, as... Figure 14 As shown, the tail connector 31 and the tail wheel bracket 32 ​​are detachably connected by the second locking screw 33 passing through the fixing hole 3111 and the positioning screw hole 3241 in sequence. The fixing hole 3111 is exposed through the slide groove 41 for easy operation by the operator.

[0042] In this embodiment, the tail wheel bracket 32 ​​is provided with a second auxiliary hole 321. The second auxiliary hole 321 is a hexagonal hole, which makes it convenient for the staff to use a hexagonal wrench 5 to apply external force to the tail wheel bracket 32 ​​through the slide groove 41, and facilitates the disassembly and assembly of the tail wheel bracket 32 ​​and the tail connector 31 in the narrow space of the slide rail 4.

[0043] In this embodiment, as Figure 12 As shown, an outer block 312 is disposed at one end of the main body 311, and a first pulley 314 is rotatably mounted on the outer block 312. An inner block 313 is disposed at the other end of the main body 311, extending into the housing 1. The inner block 313 has at least two inner pin holes 3131; the side wall of the housing 1 has at least two outer pin holes corresponding to the at least two inner pin holes 3131. In this embodiment, there are two inner pin holes 3131 and two outer pin holes.

[0044] like Figure 10 and Figure 12 As shown, the tail wheel bracket 32 ​​is equipped with a locking block 323, and the tail connector 31 is equipped with a locking groove 3121 that is adapted to the locking block 323; the locking block 323 is slidably embedded in the locking groove 3121; the locking block 323 is configured to be able to disengage from the locking groove 3121 only by sliding along the extension direction of the locking groove 3121.

[0045] In this embodiment, the slot 3121 is disposed on the inner side of the outer connecting block 312, and the locking block 323 is disposed on the inner side of the tail wheel bracket 32. Preferably, the extending direction of the slot 3121 is parallel to the extending direction of the outer connecting block 312. When the outer connecting block 312 is installed in the slide rail 4, the extending direction of the slot 3121 is parallel to the extending direction of the track 42. Here, the locking block 323 cooperates with the slot 3121 to realize the connection between the tail wheel bracket 32 ​​and the tail connector 31, so that the two cannot be separated in any direction except in the extending direction of the slot 3121. The structure is stable, which can ensure the strength requirements of the tail wheel assembly 3 and has high safety. In use, such as Figure 14 As shown, when the tail wheel bracket 32 ​​and the tail connector 31 approach and connect to each other, the locking block 323 can be inserted into the locking slot 3121 from the end of the slot 3121 to complete the assembly of the tail wheel bracket 32 ​​and the tail connector 31. The operation is simple and it is convenient for workers to quickly assemble the tail wheel bracket 32 ​​and the tail connector 31 through the narrow space of the slide rail 4 using the slide groove 41. It is highly operable, reduces the difficulty of installing the tail wheel assembly 3, and helps to improve work efficiency.

[0046] In this embodiment, the slot 3121 is a trapezoidal slot. For example... Figure 10 and Figure 12As shown, the narrow end of the clamping groove 3121 penetrates the inner side surface of the outer connecting block 312, so that the clamping groove 3121 can clamping and limiting the clamping block 323. In other embodiments, the cross section of the clamping groove 3121 can also be other shapes; the shape of the clamping groove 3121 here is to be able to cooperate with the clamping block 323 to achieve the clamping block 323 only in the way of sliding along the extension direction of the clamping groove 3121 to be separated from the clamping groove 3121.

[0047] Further, the clamping block 323 is arranged on the inner side surface of the tail wheel hanger 32, and the clamping block 323 is provided with a clearance groove 3231, the extension direction of the clearance groove 3231 is parallel to the extension direction of the clamping groove 3121; the bottom of the clamping groove 3121 is provided with a protrusion 3141; when the clamping block 323 is embedded in the clamping groove 3121, the protrusion 3141 extends into the clearance groove 3231. In this embodiment, the protrusion 3141 cooperates with the clearance groove 3231 to make the connection between the tail wheel hanger 32 and the tail wheel connecting piece more firm, and at the same time can play a certain guiding role for the cooperation of the clamping groove 3121 and the clamping block 323. In other embodiments, the protrusion 3141 can be the mounting shaft of the first pulley 314.

[0048] Preferably, the clamping block 323 is integrally formed with the tail wheel hanger 32. Preferably, the outer connecting block 312, the main body 311 and the inner connecting block 313 are sequentially distributed and integrally formed.

[0049] Further, the first pulley 314 is provided with a rolling groove a 3142 around its peripheral side, and the second pulley 322 is provided with a rolling groove b 3221 around its peripheral side; the width of the rolling groove a 3142 is greater than the width of the rolling groove b 3221, or the width of the rolling groove b 3221 is greater than the width of the rolling groove a 3142. As shown, Figure 10 As shown, in this embodiment, the width of the rolling groove b 3221 is greater than the width of the rolling groove a 3142. In combination with Figure 13 As shown, the width of the rolling groove b 3221 and the rolling groove a 3142 is inconsistent, which can make the tail wheel assembly 3 have a floating gap in the width direction of the slide rail 4, so as to avoid the situation that the double tail wheel damping assembly is stuck in the slide rail 4

[0050] This embodiment also provides a hanger hanging pulley 2, which is detachably installed in the shell 1 and installed in the slide rail 4 through the slide groove 41, comprising: a first hanger 21 provided with a third pulley 212; a second hanger 22 provided with a fourth pulley 222; the width of the first hanger 21 and the third pulley 212 is less than the width of the slide groove 41; the width of the second hanger 22 and the fourth pulley 222 is less than the width of the slide groove 41; the first hanger 21 and the second hanger 22 are detachably connected. The structure of the first hanger 21 after being assembled with the third pulley 212 and the structure of the second hanger 22 after being assembled with the fourth pulley 222 can be installed into the slide rail 4 through the slide groove 41, so that the third pulley 212 and the fourth pulley 222 are installed in cooperation with the track 42, and the specific structure is as follows:Figure 15 As shown, in use, firstly, the first bracket 21 is inserted into the slide rail 4 through the slide groove 41 and mates with one side rail 42. Then, the second bracket 22 is inserted into the slide rail 4 through the slide groove 41 and mates with the other side rail 42. Subsequently, the first bracket 21 and the second bracket 22 are moved towards each other within the slide rail 4 until their positions in the axial direction of the slide rail 4 coincide. At this point, the first bracket 21 and the second bracket 22 are fixedly connected within the slide rail 4 using fasteners. It should be noted that the order in which the first bracket 21 and the second bracket 22 are installed is not required.

[0051] Correspondingly, when it is necessary to remove the hanging pulley 2 from the slide rail 4, first remove the fixing parts, then move the first hanging bracket 21 and the second hanging bracket 22 in opposite directions in the slide rail 4 until they are separated. At this time, the first hanging bracket 21 and the second hanging bracket 22 can be removed from the slide groove 41 respectively.

[0052] The hanging pulley 2 here adopts a modular structure, which simplifies the assembly and disassembly steps of the hanging pulley 2 on the slide rail 4 and can effectively improve the assembly and disassembly efficiency of the hanging pulley 2; at the same time, it avoids the inspection port structure opened on the slide rail 4 in the traditional process, ensuring the structural strength of the slide rail 4, high safety, and strong practicality.

[0053] In this embodiment, the first hanger 21 or the second hanger 22 is detachably installed onto the buffer assembly. Further, a connector 11 is provided at the end of the housing 1. The connector 11 has a groove, and a mounting ear 211 is embedded in the groove. The mounting ear 211 has a through hole 2111, and a fixing bolt 12 passes through the through hole 2111 to fix the mounting ear 211 to the connector 11, thereby achieving a detachable connection between the hanger pulley 2 and the housing 1, i.e., the buffer assembly.

[0054] In this embodiment, as Figure 7 and Figure 15 As shown, the second bracket 22 is provided with a first auxiliary hole 224, which can be exposed through the slide groove 41. Here, the first auxiliary hole 224 is a hexagonal hole. When assembling or disassembling the second bracket 22, the hexagonal wrench 5 can be inserted into the first auxiliary hole 224 through the slide groove 41 to facilitate applying force to the second bracket 22.

[0055] Furthermore, the first bracket 21 is provided with a guide groove 225, and the second bracket 22 is provided with a guide block 215 adapted to the guide groove 225; or the second bracket 22 is provided with a guide groove 225, and the first bracket 21 is provided with a guide block 215 adapted to the guide groove 225; the guide block 215 is slidably embedded in the guide groove 225; the guide block 215 is configured to disengage from the guide groove 225 only by sliding along the extension direction of the guide groove 225. Figure 4 , Figure 5 , Figure 7 andFigure 8 As shown, in the embodiment, the guide groove 225 is arranged on the inner side surface of the second hanger 22, and the guide block 215 is arranged on the inner side surface of the first hanger 21. Preferably, the extension direction of the guide groove 225 is parallel to the extension direction of the second hanger 22, and when the second hanger 22 is installed in the slide rail 4, the extension direction of the guide groove 225 is parallel to the extension direction of the rail 42. The guide block 215 cooperates with the guide groove 225 to realize the connection of the first hanger 21 and the second hanger 22, so that the two hangers cannot be separated in any direction except the extension direction of the guide groove 225, the structure is stable, the strength requirement of the hanger and pulley 2 can be guaranteed, and the safety is high. In use, as shown, Figure 15 As shown, when the first hanger 21 and the second hanger 22 are close to each other and connected, the guide block 215 is embedded in the guide groove 225 from the end of the guide groove 225, and the combined assembly of the first hanger 21 and the second hanger 22 is completed, which is simple to operate and facilitates the workers to quickly assemble the first hanger 21 and the second hanger 22 in the narrow space of the slide rail 4 through the slide groove 41, and the operability is strong, which reduces the installation difficulty of the hanger and pulley 2 and is conducive to improving the work efficiency.

[0056] In order to further improve the strength and stability of the first hanger 21 and the second hanger 22 after being connected, the number of the guide grooves 225 is two, and correspondingly, the number of the guide blocks 215 is two. In other embodiments, the number of the guide grooves 225 and the guide blocks 215 can be arranged according to the needs and the size of the first hanger 21 and the second hanger 22, which is not limited here.

[0057] In the embodiment, the guide groove 225 is a trapezoidal groove. As shown, Figure 4 As shown, the narrow end of the clamping groove 3121 penetrates the inner side surface of the second hanger 22, so that it can clamp and limit the guide block 215. In other embodiments, the cross section of the guide groove 225 can be a circular arc segment or other shapes; the shape of the guide groove 225 here is subject to the condition that it can cooperate with the guide block 215 to realize that the guide block 215 can only slide away from the guide groove 225 in the extension direction of the guide groove 225.

[0058] In the embodiment, the first hanger 21 is provided with a first screw hole 216, and the second hanger 22 is provided with a second screw hole 223; the first screw hole 216 and the second screw hole 223 are correspondingly distributed; when the first hanger 21 and the second hanger 22 are connected, the first screw hole 216 and the second screw hole 223 can be coaxial. In the embodiment, as shown, Figure 5As shown, the fixing member is a first locking screw 26. In use, when the guide block 215 is embedded in the guide groove 225, the first hanger 21 and the second hanger 22 are continuously pushed to make the first screw hole 216 coaxial with the second screw hole 223, at which time the first locking screw 26 is embedded in the first screw hole 216 and the second screw hole 223 in sequence to fix the relative position of the first hanger 21 and the second hanger 22. Preferably, the number of the first screw hole 216 is two, and correspondingly, the number of the second screw hole 223 is two, so that the assembled first hanger 21 and the second hanger 22 have good stability. In other embodiments, the number of the first screw hole 216 and the second screw hole 223 can be specifically set according to needs, which is not specifically limited here.

[0059] It should be noted that the first screw hole 216 here can be a light hole, the inner diameter of which is slightly larger than the outer diameter of the first locking screw 26.

[0060] In this embodiment, in order to facilitate the operation of the staff, the first screw hole 216 is arranged on the lower side of the first hanger 21, and the second screw hole 223 is arranged on the lower side of the second hanger 22, wherein: the first screw hole 216 can be exposed through the sliding groove 41. Further, in order to facilitate the assembly of the first hanger 21 and the second hanger 22, as shown in Figure 3 、 Figure 4 and Figure 8 , the first hanger 21 is configured with an extension plate 214; the width of the extension plate 214 is less than the width of the sliding groove 41; the first screw hole 216 is arranged through the extension plate 214; and the extension plate 214 is configured with a second lifting screw hole 2141. Preferably, the extension plate 214 is integrally formed with the first hanger 21. In this embodiment, the extension plate 214 is arranged on the lower side of the first hanger 21, which facilitates the installation of the first hanger 21 into the sliding rail 4. When the first hanger 21 and the second hanger 22 are connected, the second hanger 22 is on the upper side of the extension plate 214.

[0061] As shown in Figure 8 and Figure 15 , the lifting member 6 is threadedly connected to the second lifting screw hole 2141. The second lifting screw hole 2141 here can be exposed through the sliding groove 41. The disassembly and assembly of the first hanger 21 and the second hanger 22 are facilitated by the cooperation of the lifting member 6 and the hexagonal wrench 5.

[0062] In order to facilitate the assembly of the hanger pulley 2 with other parts, the first hanger 21 or the second hanger 22 is configured with a mounting ear 211. In this embodiment, the mounting ear 211 is arranged on the first hanger 21 and integrally formed therewith.

[0063] As shown in Figure 2 、 Figure 3 and Figure 5As shown, the inner side of the first hanger 21 is configured with a first half screw hole 232, and the inner side of the second hanger 22 is configured with a second half screw hole 231; when the first hanger 21 is connected with the second hanger 22, the first half screw hole 232 can be combined with the second half screw hole 231 to form a first hoisting screw hole 23. In this embodiment, the first hoisting screw hole 23 is distributed on the upper side of the second hoisting screw hole 2141, and is used to be threadedly connected with the screw rod installed on the hoisting piece 6 on the basis of the second hoisting screw hole 2141, and has high firmness. In other embodiments, the first hoisting screw hole 23 can be a light hole, and the inner diameter of the light hole is slightly larger than the inner diameter of the second hoisting screw hole 2141, and is used to avoid the screw rod installed on the hoisting piece 6.

[0064] Further, in order to increase the structural strength of the first hanger 21 and the second hanger 22, the outer side of the first hanger 21 is configured with a first reinforcing block 213 in an integral forming manner, and the first reinforcing block 213 is distributed close to the first half screw hole 232; the outer side of the second hanger 22 is configured with a second reinforcing block 221 in an integral forming manner, and the second reinforcing block 221 is distributed close to the second half screw hole 231.

[0065] As shown in Figure 3 and Figure 5 , the first hanger 21 and the second hanger 22 are both configured with a brush assembly; the brush assembly on the first hanger 21 is distributed in correspondence with the third pulley 212; the brush assembly on the second hanger 22 is distributed in correspondence with the fourth pulley 222. Further, the brush assembly comprises a mounting plate 25, and the mounting plate 25 is configured with bristles 251; the first hanger 21 and the second hanger 22 are respectively fixedly connected with the corresponding mounting plate 25. Still further, as shown in Figure 6 , the outer side of each of the first hanger 21 and the second hanger 22 is provided with a mounting blind hole 27, and the side wall of the mounting blind hole 27 is provided with an extension slot 28; the mounting plate 25 is embedded in the mounting blind hole 27, and the bristles 251 extend out of the mounting blind hole 27 through the extension slot 28; the opening end of the mounting blind hole 27 is clamped with a plugging block 24.

[0066] The brush assembly herein is convenient to disassemble and replace and maintain, and in the use process, the bristles 251 always abut to the surface of the track 42 corresponding to the third pulley 212 and the fourth pulley 222, so that the surface of the track 42 can be cleaned in real time in the moving process of the hanger and pulley 2, thereby ensuring the smoothness of the cooperation between the pulley and the track 42.

[0067] The technical means disclosed in the present application scheme is not limited to the technical means disclosed in the above embodiments, and also includes the technical solutions composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, which are also considered within the protection scope of the present application.

Claims

1. A dual tail wheel damping assembly, characterized by, The buffer assembly comprises a shell (1), one end of the shell (1) is provided with a tail connecting piece (31), and a tail wheel hanger (32) is detachably arranged on the tail connecting piece (31); The tail connecting piece (31) is provided with a first pulley (314), and the tail wheel hanger (32) is provided with a second pulley (322); The tail connecting piece (31) comprises a main body (311), and the main body (311) is provided with a clamping blind hole (3112) and a fixing hole (3111) in communication with each other, and the tail wheel hanger (32) is provided with an extension protrusion (324) matched with the clamping blind hole (3112), and the extension protrusion (324) is provided with a positioning screw hole (3241); When the extension protrusion (324) is embedded in the clamping blind hole (3112), the fixing hole (3111) can be coaxial with the positioning screw hole (3241).

2. The dual tail wheel damping assembly of claim 1, wherein, The shell (1) and the tail connecting piece (31) are detachably connected.

3. The dual tail wheel damping assembly of claim 1, wherein, The tail connecting piece (31) comprises a main body (311), and the other end of the main body (311) is provided with an inner joint block (313), which extends into the shell (1) and is fixedly connected with the shell (1).

4. The dual tail wheel damping assembly of claim 3, wherein, The inner joint block (313) is provided with at least two inner pin holes (3131); The side wall of the shell (1) is provided with at least two outer pin holes corresponding to the at least two inner pin holes (3131).

5. The dual tail wheel damping assembly of any one of claims 1-4, wherein, The tail wheel hanger (32) is provided with a clamping block (323), and the tail connecting piece (31) is provided with a clamping groove (3121) matched with the clamping block (323); The clamping block (323) is slidably embedded in the clamping groove (3121); The clamping block (323) is configured to be able to slide out of the clamping groove (3121) only in the extension direction of the clamping groove (3121).

6. The dual tail wheel damping assembly of claim 5, wherein, The clamping groove (3121) is a trapezoidal groove.

7. The dual tail wheel damping assembly of claim 5, wherein, The clamping block (323) is arranged on the inner side of the tail wheel hanger (32), and a clearance groove (3231) is formed in the clamping block (323), and the extension direction of the clearance groove (3231) is parallel to the extension direction of the clamping groove (3121); The bottom of the clamping groove (3121) is provided with a protruding strip (3141); When the clamping block (323) is embedded in the clamping groove (3121), the protruding strip (3141) extends into the clearance groove (3231).

8. The dual tail wheel damping assembly of claim 1, wherein, The first pulley (314) is provided with a rolling groove a (3142) around the circumference thereof, and the second pulley (322) is provided with a rolling groove b (3221) around the circumference thereof; The width of the rolling groove a (3142) is greater than the width of the rolling groove b (3221), or The width of the rolling groove b (3221) is greater than the width of the rolling groove a (3142).

9. The dual tail wheel damping assembly of claims 1, 2, 3, or 8, wherein, The tail wheel hanger (32) is provided with a second auxiliary hole (321).

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