Damping and buffering structure of tackle

Abstract

The utility model relates to a damping and buffering structure of a pulley. The technical problem that an existing tackle body is not high in applicability is solved. Comprising two tackle bodies arranged in a curtain track in a sliding mode, tackle arms are arranged at the lower ends of the tackle bodies respectively, the tackle arms of the two tackle bodies are oppositely arranged in a staggered mode, idler wheel structures are arranged on the tackle bodies, and damping buffering pieces which are oppositely arranged are arranged at the ends, close to each other, of the two tackle bodies respectively. Synchronous belt mounting parts are arranged at the upper ends of the two tackle bodies and on the sides relatively far away from each other through detachable mounting structures, and the synchronous belt mounting parts of the two tackle bodies are located on the same horizontal plane and connected with the two sides of the same synchronous belt body; or the synchronous belt mounting parts of the two pulley bodies are not positioned on the same horizontal plane and are respectively connected with different synchronous belt bodies. The anti-collision pulley has the advantages that the impact strength between the pulley bodies can be effectively relieved through the damping and buffering pieces, the impact abnormal sound is reduced, the pulley bodies and the synchronous belt can be protected, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of curtain pulleys, and in particular relates to a shock-absorbing and buffering structure of a pulley. Background Art

[0002] Most of the existing curtains are manual curtains, but manual curtains are troublesome and laborious, so the existing manual curtains have gradually turned to electric curtains. Electric curtains can control the curtain motor through a remote control to drive the pulley body to slide in the curtain track, which is convenient and labor-saving; however, most of the existing pulley bodies are only equipped with two rollers, which causes the pulley body to slide unstably in the curtain track, easily produces abnormal noise and the sliding is not smooth enough; and adjacent pulley bodies are prone to collision during use, and the two ends of the existing pulley bodies are mostly made of rigid materials, and when the pulley bodies collide, abnormal noise will be generated, and the service life of the pulley body and the synchronous belt will be reduced.

[0003] In order to solve the deficiencies of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a pulley frame for electric curtains [201020288859.4], which includes a main body, a plurality of rollers mounted on a guide rail, and a connecting plate for connecting the curtain ring, wherein the number of the rollers is at least 4, arranged in pairs on both sides of the main body, and at least 2 pairs of the rollers are located at both ends of the main body or adjacent to both ends of the main body. And an anti-collision rubber is respectively arranged at the outermost end of the pulley frame.

[0004] The above solution solves the problem of reduced service life caused by collision of the existing pulley body to a certain extent, but the solution still has many shortcomings. For example, its pulley frame can only be used in a curtain track with a single synchronous belt, which makes the applicability of its pulley frame low and affects the user experience. Summary of the invention

[0005] The purpose of the utility model is to provide a shock absorbing and buffering structure of a pulley in view of the above problems.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a shock-absorbing and buffering structure of a pulley, comprising two pulley bodies slidably arranged in a curtain track, the lower ends of the pulley bodies are respectively provided with pulley arms and the pulley arms of the two pulley bodies are relatively staggered, the pulley bodies are provided with roller structures that match the inside of the curtain track, and the ends of the two pulley bodies close to each other are respectively provided with relatively arranged shock-absorbing and buffering parts. The upper ends of the two pulley bodies and the relatively far sides are respectively provided with synchronous belt mounting parts through a detachable mounting structure, and the synchronous belt mounting parts of the two pulley bodies are located on the same horizontal plane and connected to the two sides of the same synchronous belt body; or, the synchronous belt mounting parts of the two pulley bodies are not located on the same horizontal plane and are respectively connected to different synchronous belt bodies, and the pulley body can be applied to a single synchronous belt body or a double synchronous belt body through the detachable mounting structure and the synchronous belt mounting part, thereby improving the applicability of the pulley body.

[0007] In the above-mentioned shock-absorbing and buffering structure of a pulley, the pulley body includes a pulley mounting seat, two symmetrically arranged pulley connecting seats are provided on the upper end of the pulley mounting seat, and the pulley arm is arranged on one side of the pulley mounting seat, and the synchronous belt mounting member, roller structure and shock-absorbing and buffering member are all arranged on the pulley connecting seat, which can improve the compactness of the overall structure, effectively reduce the abnormal noise generated by the pulley body during use, and improve the user experience.

[0008] In the above-mentioned shock-absorbing and buffering structure of a pulley, the pulley mounting seat is a sheet-like body in the shape of a mountain, the pulley connecting seats are respectively provided with slots, and the slots of the pulley connecting seats extend to the corresponding sides of the two pulley mounting seats, the two pulley connecting seats are respectively fixed on the pulley mounting seats through the slots, and the lower end of the pulley connecting seat extends to the lower end of the pulley mounting seat, and the slots can facilitate the plug-in and positioning of the pulley mounting seat and the pulley connecting seat, and the pulley mounting seat and the pulley connecting seat are fixedly connected by a number of fixing screws to ensure the stability of the connection.

[0009] In the above-mentioned shock-absorbing and buffering structure of a pulley, the shock-absorbing and buffering parts at the ends of the two pulley bodies that are close to each other are located on the same horizontal plane, and each pulley body has two shock-absorbing and buffering parts, which are symmetrically arranged at the ends of the two pulley connecting seats of the pulley body that are away from each other. This can facilitate the installation of the pulley bodies, and when the pulley bodies are installed in any order, the shock-absorbing and buffering parts of the connected pulley bodies can be arranged relative to each other to ensure the shock-absorbing effect.

[0010] In the above-mentioned shock-absorbing and buffering structure of a pulley, the shock-absorbing and buffering component is a rubber pad, and the ends of the pulley connecting seats that are away from each other are respectively provided with shock-absorbing and buffering connecting parts extending outward, one side of the shock-absorbing and buffering component has a buffer installation groove, and the shock-absorbing and buffering connecting part is inserted and positioned in the buffer installation groove, and the shock-absorbing and buffering connecting part can be fixedly connected to the shock-absorbing and buffering connecting part through the buffer installation groove.

[0011] In the above-mentioned shock-absorbing and buffering structure of a pulley, the roller structure includes a first roller assembly arranged on the pulley body and located in the curtain track, a track groove is arranged on one side of the curtain track, and the track groove passes through the lower end of the pulley body, and the pulley body is provided with a second roller assembly located in the track groove. The first roller assembly can make the pulley body stably slide in the curtain track, and the second roller assembly can improve the sliding stability of the pulley body during the sliding process, thereby ensuring that the curtain can run stably and improving the user experience.

[0012] In the above-mentioned shock-absorbing and buffering structure of a pulley, the first roller assembly includes a track guide wheel shaft respectively arranged at one end of the two pulley connecting seats of the pulley body away from each other and close to the shock-absorbing and buffering connecting part. The track guide wheel shaft is horizontally penetrated through the pulley connecting seat and track guide wheel bodies are respectively provided at both ends of the track guide wheel shaft. The track guide wheel body can be easily installed through the track guide wheel shaft, and the track guide wheel bodies on both sides can be slidably arranged on the curtain track.

[0013] In the above-mentioned shock-absorbing and buffering structure of a pulley, the second roller assembly includes mounting notches which are respectively arranged at one end of the two pulley connecting seats of the pulley body away from each other and located at the lower side of the shock-absorbing and buffering connecting part. A vertically arranged track groove roller shaft is provided in the mounting notch, and a track groove roller body located in the track groove is provided on the track groove roller shaft. The mounting notch can facilitate the installation of the track groove roller shaft and the track groove roller body, and can facilitate the rotation of the track groove roller body in the track groove.

[0014] In the above-mentioned shock-absorbing and buffering structure of a pulley, the detachable mounting structure includes an upper socket and a lower socket respectively arranged on each pulley connecting seat of the pulley body, and the upper socket is located above the lower socket, and the same side of the two pulley bodies respectively has two synchronous belt mounting parts located on the same horizontal plane, the synchronous belt mounting part on the outside of one of the two pulley bodies is plugged into the upper socket, and the synchronous belt mounting part on the outside of the remaining one of the two pulley bodies is plugged into the lower socket, and the pulley body can be fixedly connected to the synchronous belt mounting part through the upper socket and the lower socket.

[0015] In the above-mentioned shock-absorbing and buffering structure of a pulley, two ring-shaped synchronous belt bodies are arranged respectively upper and lower in the curtain track, and the synchronous belt bodies are respectively connected to their own transmission components. One of the two synchronous belt bodies is connected to one of the pulley bodies through a synchronous belt mounting piece, and the remaining one of the two synchronous belt bodies is connected to the other pulley body through a synchronous belt mounting piece.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. The first roller assembly can be used to enable the pulley body to be slidably arranged in the curtain track, and the second roller assembly can improve the sliding stability of the sliding body in the curtain track.

[0018] 2. The shock-absorbing and buffering parts can effectively reduce the impact force between the pulley bodies, reduce the abnormal impact noise, and can protect the pulley body and the synchronous belt, thereby increasing the service life.

[0019] 3. The detachable installation structure can facilitate the disassembly and assembly of the synchronous belt mounting parts, thereby improving the loading and unloading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a structural sectional view of the utility model.

[0022] Figure 3 It is a structural schematic diagram of the first roller assembly in the utility model.

[0023] Figure 4 It is a structural schematic diagram of the second roller assembly in the utility model.

[0024] In the figure: curtain track 1, track groove 11, pulley body 2, pulley arm 21, synchronous belt mounting member 22, pulley mounting seat 23, pulley connecting seat 24, slot 241, roller structure 3, first roller assembly 31, track guide wheel shaft 311, track guide wheel body 312, second roller assembly 32, mounting notch 321, track groove roller shaft 322, track groove roller body 323, shock-absorbing buffer member 4, shock-absorbing buffer connecting portion 41, buffer member mounting groove 42, detachable mounting structure 5, upper socket 51, lower socket 52, synchronous belt body 6, transmission assembly 7, main transmission box 71, auxiliary transmission box 72, transmission gear set 73. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figure 1 , Figure 2, Figure 3 , Figure 4 As shown, a shock-absorbing and buffering structure of a pulley comprises two pulley bodies 2 slidably arranged in a curtain track 1, pulley arms 21 are respectively arranged at the lower ends of the pulley bodies 2, and the pulley arms 21 of the two pulley bodies 2 are relatively staggered, so that the curtains can be respectively installed at the two ends of the curtain track 1, and the curtains can be easily adjusted on one side or both sides. A roller structure 3 matched with the inside of the curtain track 1 is provided on the pulley body 2, and the pulley body 2 can be slidably arranged in the curtain track 1 through the roller structure 3, and the running stability can be improved and the noise can be reduced. The ends of the two pulley bodies 2 close to each other are respectively provided with shock-absorbing and buffering parts 4 arranged relatively, and the shock-absorbing and buffering parts 4 can buffer the impact generated during the operation of the pulley body 2 The impact can play a shock-absorbing role and can effectively reduce the abnormal noise caused by impact. The upper ends of the two pulley bodies 2 and the relatively distant sides are respectively provided with synchronous belt mounting parts 22 through the detachable mounting structure 5. The detachable mounting structure 5 can facilitate the installation and disassembly of the synchronous belt mounting parts 22, thereby improving the loading and unloading efficiency. The synchronous belt mounting parts 22 of the two pulley bodies 2 are located on the same horizontal plane and are connected to the two sides of the same synchronous belt body 6; or, the synchronous belt mounting parts 22 of the two pulley bodies 2 are not located on the same horizontal plane and are respectively connected to different synchronous belt bodies 6, and the detachable mounting structure 5 and the synchronous belt mounting parts 22 can make the pulley body 2 suitable for a single synchronous belt body 6 or a double synchronous belt body 6, thereby improving the applicability of the pulley body 6.

[0027] Specifically, the pulley body 2 includes a pulley mounting seat 23, two symmetrically arranged pulley connecting seats 24 are provided at the upper end of the pulley mounting seat 23, and the pulley arm 21 is arranged on one side of the pulley mounting seat 23, and the synchronous belt mounting member 22, the roller structure 3 and the shock-absorbing buffer member 4 are all arranged on the pulley connecting seat 24, which can improve the compactness of the overall structure, effectively reduce the abnormal noise generated by the pulley body 2 during use, and improve the user experience.

[0028] Among them, the pulley mounting seat 23 is a sheet-like body in the shape of a mountain, and the pulley connecting seat 24 has a slot 241 respectively, and the slot 241 of the pulley connecting seat 24 extends to the side corresponding to the two pulley mounting seats 23, and the two pulley connecting seats 24 are respectively plugged and fixed on the pulley mounting seat 23 through the slot 241, and the lower end of the pulley connecting seat 24 extends to the lower end of the pulley mounting seat 23, and the slot 241 can facilitate the plug-in and positioning of the pulley mounting seat 23 and the pulley connecting seat 24, and the pulley mounting seat 23 and the pulley connecting seat 24 are fixedly connected by a plurality of fixing screws to ensure the stability of the connection.

[0029] like Figure 2 , Figure 3 , Figure 4As shown, the shock-absorbing buffers 4 at the ends of the two pulley bodies 2 that are close to each other are located on the same horizontal plane, which can ensure that when the two pulley bodies 2 collide, the shock-absorbing buffers 4 can play a good buffering effect and ensure the protection of the pulley bodies 2. Each pulley body 2 has two shock-absorbing buffers 4 and they are symmetrically arranged at the ends of the two pulley connecting seats 24 of the pulley body 2 that are far away from each other, which can facilitate the installation of the pulley body 2. When the pulley bodies 2 are installed in any order, the shock-absorbing buffers 4 of the connected pulley bodies 2 can be arranged relative to each other to ensure the shock-absorbing effect.

[0030] Furthermore, the shock-absorbing buffer 4 is a rubber pad, which can have a good shock-absorbing effect and ensure the protection of the pulley body 2 and the synchronous belt body 6, and the ends of the pulley connecting seats 24 that are away from each other are respectively provided with shock-absorbing buffer connecting parts 41 extending outward, and the shock-absorbing buffer 4 has a buffer mounting groove 42 on one side, and the shock-absorbing buffer connecting part 41 is inserted and positioned in the buffer mounting groove 42. The buffer mounting groove 42 can facilitate the fixed connection between the shock-absorbing buffer 4 and the shock-absorbing buffer connecting part 41.

[0031] Among them, the roller structure 3 includes a first roller assembly 31 arranged on the pulley body 2 and located in the curtain rail 1, a track groove 11 is arranged on one side of the curtain rail 1, and the track groove 11 passes through the lower end of the pulley body 2, and a second roller assembly 32 located in the track groove 11 is arranged on the pulley body 2. The first roller assembly 31 can make the pulley body 2 stably slide and be arranged in the curtain rail 1, and the second roller assembly 32 can improve the sliding stability of the pulley body 2 during the sliding process, thereby ensuring that the curtain can run stably and improving the user experience.

[0032] Combination Figure 2 , Figure 3 , Figure 4 As shown, the first roller assembly 31 includes a track guide wheel shaft 311 which is respectively arranged at one end of the two pulley connecting seats 24 of the pulley body 2 away from each other and close to the shock-absorbing and buffering connecting part 41. The track guide wheel shaft 311 is horizontally penetrated through the pulley connecting seat 24 and track guide wheel bodies 312 are respectively provided at both ends of the track guide wheel shaft 311. The track guide wheel body 312 can be easily installed through the track guide wheel shaft 311, and the track guide wheel bodies 312 on both sides can be slidably arranged on the curtain track 1.

[0033] Among them, the second roller assembly 32 includes an installation notch 321 which is respectively arranged at one end of the two pulley connecting seats 24 of the pulley body 2 away from each other and located at the lower side of the shock-absorbing and buffering connecting part 41, and a vertically arranged track groove roller shaft 322 is provided in the installation notch 321, and a track groove roller body 323 located in the track groove 11 is provided on the track groove roller shaft 322. The installation notch 321 can facilitate the installation of the track groove roller shaft 322 and the track groove roller body 323, and can facilitate the rotation of the track groove roller body 323 in the track groove 11.

[0034] Specifically, the detachable mounting structure 5 includes an upper socket 51 and a lower socket 52 respectively arranged on each pulley connecting seat 24 of the pulley body 2, and the upper socket 51 is located above the lower socket 52. The upper socket 51 and the lower socket 52 can facilitate the up and down staggered arrangement of the synchronous belt mounting parts 22. The same side of the two pulley bodies 2 respectively has two synchronous belt mounting parts 22 located on the same horizontal plane. The synchronous belt mounting part 22 on the outside of one of the two pulley bodies 2 is plugged into the upper socket 51, and the synchronous belt mounting part 22 on the outside of the remaining one of the two pulley bodies 2 is plugged into the lower socket 52. The upper socket 51 and the lower socket 52 can facilitate the pulley body 2 to be fixedly connected to the synchronous belt mounting part 22.

[0035] Combination Figure 1 , Figure 2 As shown, two annular synchronous belt bodies 6 are provided in the curtain track 1 and are respectively arranged up and down. The synchronous belt bodies 6 are respectively connected to their own transmission components 7, and the synchronous belt bodies 6 can be driven to move by the transmission components 7, and the transmission components 7 have a main transmission box 71 arranged at one end of the curtain track 1 and an auxiliary transmission box 72 arranged at the other end of the curtain track 1. The main transmission box 71 and the auxiliary transmission box 72 are both provided with a transmission gear set 73 connected to the synchronous belt body 6 by transmission, and one side of the main transmission box 71 has a curtain motor connected to the transmission gear set 73 by transmission, and the curtain motor can drive the transmission gear set 73 to rotate, thereby driving the synchronous belt body 6 to move, and one of the two synchronous belt bodies 6 is connected to one of the pulley bodies 2 through the synchronous belt mounting member 22, and the remaining one of the two synchronous belt bodies 6 is connected to the other pulley body 2 through the synchronous belt mounting member 22.

[0036] The principle of this embodiment is that the pulley body 2 is slidingly set in the curtain rail 1 through the roller structure 3 to ensure the sliding stability and smoothness of the pulley body 2 in the curtain rail 1, and the two sides of the pulley body 2 are fixedly connected to the synchronous belt mounting parts 22 through the detachable mounting structure 5, and can be fixedly connected to the synchronous belt body 6 through the synchronous belt mounting parts 22, and the synchronous belt mounting parts 22 can be conveniently arranged up and down or on the same horizontal plane through the upper plug hole 51 and the lower plug hole 52, so that the pulley body 2 can be suitable for various curtain rail requirements, can meet the requirements of being connected to a single synchronous belt body 6 for transmission and can meet the requirements of being connected to a double synchronous belt body 6 for transmission, thereby improving the applicability of the pulley body 2, and shock-absorbing buffers 4 are provided at both ends of the pulley body 2, which can play a shock-absorbing role when adjacent pulley bodies 2 collide during use, can reduce abnormal noise, and can increase the service life between the pulley body 2 and the synchronous belt body 6.

[0037] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0038] Although the present invention uses more terms such as curtain track 1, track groove 11, pulley body 2, pulley arm 21, synchronous belt mounting member 22, pulley mounting seat 23, pulley connecting seat 24, slot 241, roller structure 3, first roller assembly 31, track guide wheel shaft 311, track guide wheel body 312, second roller assembly 32, mounting notch 321, track groove roller shaft 322, track groove roller body 323, shock-absorbing buffer member 4, shock-absorbing buffer connection part 41, buffer member mounting groove 42, detachable mounting structure 5, upper plug hole 51, lower plug hole 52, synchronous belt body 6, transmission assembly 7, main transmission box 71, auxiliary transmission box 72, transmission gear set 73, etc., the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A pulley shock-absorbing and buffering structure, comprising two pulley bodies (2) slidably arranged in a curtain track (1), wherein pulley arms (21) are respectively arranged at the lower ends of the pulley bodies (2) and the pulley arms (21) of the two pulley bodies (2) are relatively staggered, characterized in that: The pulley body (2) is provided with a roller structure (3) that cooperates with the interior of the curtain rail (1); the ends of the two pulley bodies (2) that are close to each other are respectively provided with shock-absorbing buffers (4) that are arranged opposite to each other; the upper ends of the two pulley bodies (2) and the relatively distant sides are respectively provided with synchronous belt mounting parts (22) through detachable mounting structures (5); the synchronous belt mounting parts (22) of the two pulley bodies (2) are located on the same horizontal plane and are connected to the two sides of the same synchronous belt body (6); or, the synchronous belt mounting parts (22) of the two pulley bodies (2) are not located on the same horizontal plane and are respectively connected to different synchronous belt bodies (6).

2. The shock absorbing and buffering structure of a pulley according to claim 1, characterized in that: The pulley body (2) comprises a pulley mounting seat (23), the upper end of which is provided with two symmetrically arranged pulley connecting seats (24), and the pulley arm (21) is arranged on one side of the pulley mounting seat (23), and the synchronous belt mounting member (22), the roller structure (3) and the shock absorbing and buffering member (4) are all arranged on the pulley connecting seat (24).

3. The shock absorbing and buffering structure of a pulley according to claim 2, characterized in that: The pulley mounting seat (23) is a sheet-like body in a mountain shape, and the pulley connecting seat (24) has a slot (241) therein, and the slot (241) of the pulley connecting seat (24) extends to the side corresponding to the two pulley mounting seats (23), and the two pulley connecting seats (24) are respectively plugged and fixed on the pulley mounting seats (23) through the slot (241), and the lower end of the pulley connecting seat (24) extends to the lower end of the pulley mounting seat (23).

4. A shock absorbing and buffering structure of a pulley according to claim 2 or 3, characterized in that: The shock absorbing and buffering components (4) at the ends of the two pulley bodies (2) that are close to each other are located on the same horizontal plane. Each pulley body (2) has two shock absorbing and buffering components (4) that are symmetrically arranged at the ends of the two pulley connecting seats (24) of the pulley body (2) that are away from each other.

5. The shock absorbing and buffering structure of a pulley according to claim 4, characterized in that: The shock-absorbing buffer (4) is a rubber pad, and the ends of the pulley connecting seats (24) that are away from each other are respectively provided with shock-absorbing buffer connecting parts (41) extending outward, and one side of the shock-absorbing buffer (4) has a buffer installation groove (42), and the shock-absorbing buffer connecting part (41) is inserted and positioned in the buffer installation groove (42).

6. The shock absorbing and buffering structure of a pulley according to claim 5, characterized in that: The roller structure (3) comprises a first roller assembly (31) arranged on a pulley body (2) and located in the curtain track (1); a track groove (11) is provided on one side of the curtain track (1), and the track groove (11) extends out from the lower end of the pulley body (2); and a second roller assembly (32) is provided on the pulley body (2) and located in the track groove (11).

7. The shock absorbing and buffering structure of a pulley according to claim 6, characterized in that: The first roller assembly (31) comprises a track guide wheel shaft (311) which is respectively arranged at one end of two pulley connection seats (24) of the pulley body (2) which are away from each other and close to the shock-absorbing and buffering connection part (41); the track guide wheel shaft (311) is horizontally penetrated through the pulley connection seat (24) and track guide wheel bodies (312) are respectively arranged at both ends of the track guide wheel shaft (311).

8. The shock absorbing and buffering structure of a pulley according to claim 6, characterized in that: The second roller assembly (32) comprises mounting notches (321) which are respectively arranged at ends of two pulley connecting seats (24) of the pulley body (2) which are away from each other and are located at the lower side of the shock-absorbing and buffering connecting portion (41); a vertically arranged track groove roller shaft (322) is arranged in the mounting notch (321); and a track groove roller body (323) located in the track groove (11) is arranged on the track groove roller shaft (322).

9. The shock absorbing and buffering structure of a pulley according to claim 6, characterized in that: The detachable mounting structure (5) comprises an upper plug hole (51) and a lower plug hole (52) respectively arranged on each pulley connecting seat (24) of the pulley body (2), and the upper plug hole (51) is located above the lower plug hole (52), and the same side of the two pulley bodies (2) respectively has two synchronous belt mounting parts (22) located on the same horizontal plane, and the synchronous belt mounting part (22) on the outer side of one of the two pulley bodies (2) is plugged into the upper plug hole (51), and the synchronous belt mounting part (22) on the outer side of the remaining one of the two pulley bodies (2) is plugged into the lower plug hole (52).

10. The shock absorbing and buffering structure of a pulley according to claim 1, characterized in that: The curtain rail (1) is provided with two annular synchronous belt bodies (6) which are respectively arranged at the top and the bottom. The synchronous belt bodies (6) are respectively connected to respective transmission components. One of the two synchronous belt bodies (6) is connected to one of the pulley bodies (2) via a synchronous belt mounting member (22), and the remaining one of the two synchronous belt bodies (6) is connected to the other pulley body (2) via a synchronous belt mounting member (22).

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