CN219109178U

CN219109178U - Duplex structure pulley capable of simultaneously passing through two tracks

Info

Publication number: CN219109178U
Application number: CN202223464795.0U
Authority: CN
Inventors: 孙旭东; 万士强; 杨恩丰
Original assignee: Hangzhou Wistar Mechanical And Electric Technology Co ltd
Current assignee: Hangzhou Wistar Mechanical And Electric Technology Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-06-02
Anticipated expiration: 2032-12-20

Abstract

The utility model relates to a duplex structure pulley capable of simultaneously passing through two rails. The technical problems that the existing trolley body generates abnormal sound and jams during transition of two tracks are solved. Including the coaster body, the coaster body has the vertical sliding part of vertical setting, and vertical sliding part lower extreme downwardly extending is equipped with coaster arm connecting portion, and vertical sliding part upper end has at least a set of duplex type slip group that extends along vertical sliding part axial and set up, and each duplex type slip group all includes two and corresponds the setting in vertical sliding part upper end both sides and can with different track complex I shape sliding part, and arbitrary I shape sliding part upper end is equipped with the transmission medium connecting portion. The advantages are that: the device is structurally optimized, the sliding part of the pulley body is similar to an I shape in structure, the sliding part can be effectively and stably transited from the contact surface of one rail to the other rail, and the problems of abnormal sound and blocking when the pulley body in the double-rail electric curtain slides are solved.

Description

Duplex structure pulley capable of simultaneously passing through two tracks

Technical Field

The utility model belongs to the technical field of electric curtain equipment, and particularly relates to a duplex structure pulley capable of simultaneously passing through two rails.

Background

In modern life, curtains are arranged on windows in rooms, so that the curtains can play a role in shading, sun and strong light can be shaded in the daytime, and meanwhile, outdoor vision can be shaded, so that the effect of protecting privacy is achieved; generally, the curtains are manually pushed and pulled to open and close, and with the development of smart home, the electric curtains start to enter the life of people. The structure of current coaster body sets up and can smoothly move in single track (window) curtain, and the current market is because the size needs the customized reason, and most people all choose to install the flexible electric window curtain of sectional type design, but because two track inner structure are different, the coaster body can not be steady move in two tracks, especially appears the condition such as card dun and abnormal sound easily when two tracks transition, influences user's use to influence electric window curtain's life.

Disclosure of Invention

The utility model aims to solve the problems and provide a duplex structure pulley capable of simultaneously passing through two rails.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a can pass through two orbital duplex type structure coasters simultaneously, includes the coaster body, the coaster body have the vertical sliding part of vertical setting, just vertical sliding part lower extreme downwardly extending be equipped with coaster arm connecting portion, vertical sliding part upper end have at least a set of duplex type slip group of setting along vertical sliding part axial extension, and each duplex type slip group all includes two corresponding setting in vertical sliding part upper end both sides and can with different orbital complex I shape sliding part, and arbitrary I shape sliding part upper end is equipped with the transmission medium connecting portion. Two I shape sliding parts correspond to be set up at vertical sliding part both ends, are favorable to balanced stable slip in different tracks, and transmission medium connecting portion sets up in arbitrary I shape sliding part upper end, is favorable to transmission medium to drive the slide car body and removes, and the slide car body adopts duplex structural design simultaneously, and the card that produces when can effectually solving the slide car body and put into question and abnormal sound problem.

In the duplex structure pulley capable of simultaneously passing through two tracks, the I-shaped sliding parts are integrally formed at the side parts of the upper end of the vertical sliding part respectively, the I-shaped sliding parts of each duplex sliding group are symmetrically arranged, and the pulley arm connecting parts are vertically formed at the lower ends of the vertical sliding parts and the blocking parts are arranged between the pulley arm connecting parts and the vertical sliding parts. The blocking part is favorable for accurately connecting the trolley body and the trolley arm, the trolley body is spliced in the trolley arm through the trolley arm connecting part, the upper end of the trolley arm is propped against the lower end of the blocking part, so that the time for connection alignment can be reduced, the I-shaped sliding part and the vertical sliding part are integrally formed, the firmness of the trolley body is improved, and the service life of the trolley body is prolonged.

In the duplex structure pulley capable of simultaneously passing through two tracks, the I-shaped sliding part comprises a first horizontal part which is horizontally and outwards extended from the upper end of the vertical sliding part, the middle of the first horizontal part is provided with a vertical part which is downwards and vertically extended, the lower end of the vertical part is provided with a second horizontal part which is parallel to the first horizontal part, and the first horizontal part, the vertical part and the second horizontal part are integrally formed on the vertical sliding part and form an I-shaped structure. The first horizontal part is communicated with the second horizontal part through the vertical part, so that the tightness is improved, meanwhile, the first horizontal part, the vertical part and the second horizontal part are integrally formed and form an I-shaped structure, so that the sliding limiting channel for the pulley body is formed, and the phenomenon that the pulley body is movably separated is avoided.

In the duplex structure pulley capable of simultaneously passing through two tracks, one side of the vertical part is provided with the first sliding groove positioned between the first horizontal part and the second horizontal part, the other side of the vertical part is provided with the second sliding groove positioned between the first horizontal part and the second horizontal part, and the first sliding grooves of the I-shaped sliding parts of the same duplex sliding group face different directions and the second sliding grooves of the I-shaped sliding parts of the same duplex sliding group are correspondingly arranged. The first sliding groove is internally provided with a small rail lug at the bottom of the small rail, and the second sliding groove is internally provided with a large rail lug at the bottom of the large rail, so that the vertical part of the I-shaped sliding part is movably arranged between the large rail and the small rail to form a clamping structure, and the phenomenon that the pulley body shakes left and right during sliding is reduced.

In the duplex structure pulley capable of simultaneously passing through the two rails, the length of the first horizontal part is greater than that of the second horizontal part, one end of the first horizontal part, which is far away from the vertical sliding part, exceeds one corresponding end of the second horizontal part, and an inclined sliding part which is obliquely arranged towards the second sliding groove is arranged between the other end of the first horizontal part and the vertical sliding part. The inclined sliding part is matched with the bottom of the large track, so that the sliding of the pulley body in the track is facilitated, and the supporting effect of the pulley body is also provided.

In the duplex structure pulley capable of simultaneously passing through two tracks, the upper end of the I-shaped sliding part is provided with the vertical extension part which is upwards extended and arranged by the middle part of the first horizontal part, the upper end of the vertical extension part horizontally extends and is arranged towards the horizontal extension part which is far away from the direction of the vertical sliding part, and the transmission medium connecting part is vertically formed on the upper side of one end of the horizontal extension part far away from the vertical extension part and the end of the horizontal extension part exceeds the one end of the first horizontal part far away from the vertical sliding part. The transmission medium connecting portion is connected with the horizontal extension portion, connection of the transmission medium connecting portion and the transmission medium is facilitated, normal operation of the pulley body is prevented from being influenced, meanwhile, the horizontal extension portion is propped against the upper end of the bottom of the small rail, a certain supporting force is facilitated to be provided for the transmission medium connecting portion, deformation of the transmission medium connecting portion and the horizontal extension portion is prevented from being caused for a long time, and normal use is prevented from being influenced.

In the duplex structure pulley capable of simultaneously passing through two rails, an auxiliary sliding groove is formed among the horizontal extending part, the vertical extending part and the first horizontal part, the orientation of the auxiliary sliding groove is the same as that of the first sliding groove, and an inclined auxiliary part is arranged between the first horizontal part and the vertical extending part in an inclined manner.

In the duplex structure pulley capable of simultaneously passing through two tracks, at least two pulley bodies are axially and sequentially adjacently distributed to form a group of pulley blocks, pulley arm connecting parts on the pulley bodies in the same group of pulley blocks are all arranged in pulley mounting grooves at one end of the same pulley arm, connecting piece mounting grooves which are mutually communicated are formed in all pulley arm connecting parts, pulley connecting pieces located in the pulley mounting grooves are arranged in the connecting piece mounting grooves in a penetrating mode, and the pulley arm connecting parts, the pulley connecting pieces and the pulley arms are fixedly connected. When the transmission medium is shortened due to improper operation, the problem that the transmission medium cannot be connected can be solved by arbitrarily combining the pulley body through the pulley connecting piece, and meanwhile, the pulley body has reusability and can be used for multiple times, so that the cost is saved.

In the duplex structure pulley capable of simultaneously passing through two tracks, a group of duplex sliding groups are arranged at the upper ends of the vertical sliding parts of the pulley bodies in the same group of pulley groups, the I-shaped sliding parts extend from one axial end of the vertical sliding parts to the other axial end, and pulley buckle covers are arranged on one sides of the transmission medium connecting parts. The transmission medium is arranged in the transmission medium connecting part and is sealed by the pulley buckle cover, so that the transmission medium can be fastened.

In the duplex structure pulley capable of simultaneously passing through two tracks, two duplex sliding groups are arranged at the upper end of the vertical sliding part of the pulley body, and a movable part installation space positioned between the two duplex sliding groups is arranged on one side, away from the transmission medium connecting part, of the pulley body.

Compared with the prior art, the utility model has the advantages that:

1. the device is structurally optimized, the sliding part of the pulley body is similar to an I shape in structure, the sliding part can be effectively and stably transited from the contact surface of one rail to the other rail, and the problems of abnormal sound and blocking when the pulley body in the double-rail electric curtain slides are solved.

2. The device adopts a plurality of pulley bodies that the structure is the same, has fine reusability, can splice two or three pulley bodies wantonly through the pulley connecting piece, and the incorrect problem that leads to too short unable linking of transmission medium of effectual preventing construction saves material under the condition that need not to change transmission medium, saves manual work and cost.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present utility model.

Fig. 2 is a partial exploded view of a first embodiment of the present utility model.

Fig. 3 is a side view of a first embodiment of the utility model.

Fig. 4 is a schematic structural diagram of an embodiment of the present utility model in an operating state.

Fig. 5 is a schematic structural diagram of a second embodiment of the present utility model.

Fig. 6 is a side view of a second embodiment of the present utility model.

In the figure: the pulley body 1, the vertical sliding part 11, the pulley arm 12, the pulley mounting groove 121, the movable member mounting space 13, the pulley arm connecting part 2, the blocking part 21, the connector mounting groove 22, the pulley connector 23, the duplex sliding group 3, the tilt auxiliary part 31, the i-shaped sliding part 4, the first horizontal part 41, the vertical part 42, the second horizontal part 43, the first sliding groove 44, the second sliding groove 45, the tilt sliding part 46, the vertical extending part 47, the horizontal extending part 48, the auxiliary sliding groove 49, the transmission medium connecting part 5, the pulley buckle cover 51, the small rail 6, and the large rail 7.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description.

Example 1

As shown in fig. 1-4, a duplex structure pulley capable of simultaneously passing through two tracks comprises a pulley body 1, wherein the pulley body 1 is provided with a vertical sliding part 11 which is vertically arranged, the lower end of the vertical sliding part 11 is downwards extended and provided with a pulley arm connecting part 2, the upper end of the vertical sliding part 11 is provided with at least one duplex sliding group 3 which is axially extended and arranged along the vertical sliding part 11, each duplex sliding group 3 comprises two I-shaped sliding parts 4 which are correspondingly arranged on two sides of the upper end of the vertical sliding part 11 and can be matched with different tracks, and the upper end of any I-shaped sliding part 4 is provided with a transmission medium connecting part 5. Two I shape sliding part 4 correspond to set up in vertical sliding part 11 both ends, are favorable to balanced stable slip in different tracks, and driving medium connecting portion 5 sets up in arbitrary I shape sliding part 4 upper end, is favorable to driving medium to drive slide car body 1 and removes, and slide car body 1 adopts duplex structural design simultaneously, and the card that produces when can effectually solve slide car body 1 and put into question and abnormal sound.

As shown in fig. 1, the i-shaped sliding parts 4 are integrally formed at the upper end side of the vertical sliding part 11, the i-shaped sliding parts 4 of each duplex sliding group 3 are symmetrically arranged, the pulley arm connecting part 2 is vertically formed at the lower end of the vertical sliding part 11, and a blocking part 21 is arranged between the pulley arm connecting part 2 and the vertical sliding part 11. The blocking part 21 is favorable for accurately connecting the trolley body 1 with the trolley arm 12, the trolley body 1 is spliced in the trolley arm 12 through the trolley arm connecting part 2, the upper end of the trolley arm 12 is abutted against the lower end of the blocking part 21, so that the time for connection alignment can be reduced, the I-shaped sliding part 4 and the vertical sliding part 11 are integrally formed, the firmness of the trolley body 1 is improved, and the service life of the trolley body 1 is prolonged.

As shown in fig. 3, the i-shaped sliding portion 4 includes a first horizontal portion 41 extending horizontally and outwards from an upper end of the vertical sliding portion 11, a vertical portion 42 extending vertically downwards is provided in a middle portion of the first horizontal portion 41, a second horizontal portion 43 parallel to the first horizontal portion 41 is provided at a lower end of the vertical portion 42, and the first horizontal portion 41, the vertical portion 42 and the second horizontal portion 43 are integrally formed on the vertical sliding portion 11 and form an i-shaped structure therebetween. The first horizontal part 41 and the second horizontal part 43 are communicated through the vertical part 42, so that the tightness is improved, meanwhile, the first horizontal part 41, the vertical part 42 and the second horizontal part 43 are integrally formed and form an I-shaped structure, so that the sliding block body 1 can smoothly transition to another track when passing through the contact surface of the track, the second horizontal part 43 of the I-shaped sliding part 4 moves in the large track 7 and the lower end of the small track 6, a sliding limiting channel for the sliding block body 1 is formed, and the phenomenon that the sliding block body 1 is movably separated is avoided.

Wherein, a first sliding groove 44 located between the first horizontal portion 41 and the second horizontal portion 43 is provided on one side of the vertical portion 42, a second sliding groove 45 located between the first horizontal portion 41 and the second horizontal portion 43 is provided on the other side of the vertical portion 42, and the first sliding grooves 44 of the i-shaped sliding portions 4 of the same group of duplex sliding groups 3 face different directions and the second sliding grooves 45 of the i-shaped sliding portions 4 of the same group of duplex sliding groups 3 are correspondingly arranged. The first sliding groove 44 is internally provided with a small rail lug at the bottom of the small rail 6, and the second sliding groove 45 is internally provided with a large rail lug at the bottom of the large rail 7, so that the vertical part 42 of the I-shaped sliding part 4 is movably arranged between the large rail 7 and the small rail 6 to form a clamping structure, and the phenomenon that the pulley body 1 shakes left and right during sliding is reduced.

Further, the length of the first horizontal portion 41 is greater than that of the second horizontal portion 43, and one end of the first horizontal portion 41 away from the vertical sliding portion 11 exceeds the corresponding end of the second horizontal portion 43, and an inclined sliding portion 46 which is inclined toward the second sliding groove 45 is provided between the other end of the first horizontal portion 41 and the vertical sliding portion 11. The inclined sliding part 46 is matched with the bottom of the large track 7, which is beneficial to the sliding of the pulley body 1 in the track and also provides the supporting effect for the pulley body 1.

Specifically, the upper end of the i-shaped sliding portion 4 is provided with a vertical extending portion 47 extending upward from the middle of the first horizontal portion 41, and the upper end of the vertical extending portion 47 is provided with a horizontal extending portion 48 extending horizontally away from the vertical sliding portion 11, and the transmission medium connecting portion 5 is vertically formed on the upper side of the end of the horizontal extending portion 48 away from the vertical extending portion 47, and the end of the horizontal extending portion 48 exceeds the end of the first horizontal portion 41 away from the vertical sliding portion 11. The transmission medium connecting portion 5 is connected with the horizontal extending portion 48, connection of the transmission medium connecting portion 5 and the transmission medium is facilitated, normal operation of the trolley body 1 is prevented from being influenced, meanwhile, the horizontal extending portion 48 abuts against the upper end of the bottom of the small rail 6, a certain supporting force is facilitated to be provided for the transmission medium connecting portion 5, and deformation of the transmission medium connecting portion 5 and the horizontal extending portion 48 for a long time is prevented from being caused, and normal use is prevented from being influenced.

Preferably, an auxiliary sliding groove 49 is formed between the horizontal extension portion 48, the vertical extension portion 47 and the first horizontal portion 41, and the auxiliary sliding groove 49 is oriented in the same direction as the first sliding groove 44, and an inclined auxiliary portion 31 is provided between the first horizontal portion 41 and the vertical extension portion 47.

As shown in fig. 1 and fig. 2, at least two pulley bodies 1 are axially and sequentially adjacently distributed to form a group of pulley blocks, pulley arm connecting parts 2 on the pulley bodies 1 in the same group of pulley blocks are all arranged in pulley mounting grooves 121 at one end of the same pulley arm 12, connecting piece mounting grooves 22 which are mutually communicated are formed in each pulley arm connecting part 2, pulley connecting pieces 23 which are positioned in the pulley mounting grooves 121 are penetrated in the connecting piece mounting grooves 22, and the pulley arm connecting parts 2, the pulley connecting pieces 23 and the pulley arms 12 are fixedly connected. When the transmission medium is shortened due to improper operation, the problem that the transmission medium cannot be connected can be solved by arbitrarily combining the pulley connecting pieces 23 with the pulley body 1, and meanwhile, the pulley body 1 has reusability and can be used for multiple times, so that the cost is saved.

As shown in fig. 3, a group of duplex sliding groups 3 is arranged at the upper end of a vertical sliding part 11 of a pulley body 1 in the same group of pulley groups, an i-shaped sliding part 4 extends from one axial end to the other axial end of the vertical sliding part 11, and a pulley buckle cover 51 is arranged on one side of a transmission medium connecting part 5. The transmission medium is arranged in the transmission medium connecting part 5 and is sealed by the pulley buckle cover 51, which is beneficial to fastening the transmission medium.

The principle of this embodiment is:

as shown in fig. 4, the scooter body 1 has a first horizontal portion 41, a vertical portion 42, and a second horizontal portion 43 and is formed in an i-shaped structure, which can move quietly in different tracks and can be smoothly transited from the large track 7 into the small track 6 or from the small track 6 into the large track 7; the plurality of trolley bodies 1 are fixedly connected with two or three trolley bodies 1 through the trolley connecting piece 23, and the trolley arm connecting part 2 below the trolley bodies 1 is spliced in the trolley mounting groove 121 of the trolley arm 12 to form a spliced trolley, so that the problem that transmission media are too short to be connected is solved.

Example two

The principle of the present embodiment and the steps of the embodiment are similar to those of the first embodiment, as shown in connection with fig. 5 and 6, except that: in the first embodiment, each duplex sliding group 3 includes two i-shaped sliding parts 4 correspondingly arranged at two sides of the upper end of the vertical sliding part 11 and capable of being matched with different rails, a transmission medium connecting part 5 is arranged at the upper end of any one i-shaped sliding part 4, a pulley buckle cover 51 is arranged at one side of the transmission medium connecting part 5, and the transmission medium is connected with the pulley body 1 through the transmission medium connecting part 5 and the pulley buckle cover 51. In this embodiment, the upper end of the vertical sliding portion 11 of the sliding body 1 is provided with two duplex sliding groups 3, one side of the sliding body 1 away from the transmission medium connecting portion 5 is provided with a movable member installation space 13 between the two duplex sliding groups 3, the transmission medium is arranged in the transmission medium connecting portion 5, the movable member installation space 13 is internally provided with a device for fixing the transmission medium, and the device is connected with the sliding body 1 through a pulley buckle cover 51.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although terms of the pulley body 1, the vertical sliding portion 11, the pulley arm 12, the pulley mounting groove 121, the movable member mounting space 13, the pulley arm link 2, the blocking portion 21, the link mounting groove 22, the pulley link 23, the duplex sliding group 3, the tilt auxiliary portion 31, the i-shaped sliding portion 4, the first horizontal portion 41, the vertical portion 42, the second horizontal portion 43, the first sliding groove 44, the second sliding groove 45, the tilt sliding portion 46, the vertical extending portion 47, the horizontal extending portion 48, the auxiliary sliding groove 49, the transmission medium link 5, the pulley clasp 51, the small rail 6, the large rail 7, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. The utility model provides a duplex type structure coaster that can pass through two orbits simultaneously, includes coaster body (1), coaster body (1) have vertical sliding part (11) of vertical setting, just vertical sliding part (11) lower extreme downwardly extending be equipped with coaster arm connecting portion (2), its characterized in that, vertical sliding part (11) upper end have at least a set of duplex type slip group (3) of setting along vertical sliding part (11) axial extension, and each duplex type slip group (3) all include two correspond set up in vertical sliding part (11) upper end both sides and can with different orbital complex I shape sliding part (4), and arbitrary I shape sliding part (4) upper end is equipped with driving medium connecting portion (5).

2. The duplex structure pulley capable of simultaneously passing through two rails according to claim 1, wherein the i-shaped sliding parts (4) are respectively integrally formed at the upper end side parts of the vertical sliding parts (11), the i-shaped sliding parts (4) of each duplex sliding group (3) are symmetrically arranged, the pulley arm connecting parts (2) are vertically formed at the lower ends of the vertical sliding parts (11), and blocking parts (21) are arranged between the pulley arm connecting parts (2) and the vertical sliding parts (11).

3. The duplex structure pulley capable of simultaneously passing through two rails according to claim 1 or 2, wherein the i-shaped sliding part (4) comprises a first horizontal part (41) horizontally extending outwards from the upper end of the vertical sliding part (11), a vertical part (42) vertically extending downwards is arranged in the middle of the first horizontal part (41), a second horizontal part (43) parallel to the first horizontal part (41) is arranged at the lower end of the vertical part (42), and the first horizontal part (41), the vertical part (42) and the second horizontal part (43) are integrally formed on the vertical sliding part (11) and form an i-shaped structure.

4. A duplex structure trolley capable of simultaneously passing through two rails according to claim 3, wherein a first sliding groove (44) between a first horizontal part (41) and a second horizontal part (43) is formed on one side of the vertical part (42), a second sliding groove (45) between the first horizontal part (41) and the second horizontal part (43) is formed on the other side of the vertical part (42), and the first sliding grooves (44) of the i-shaped sliding parts (4) of the same duplex sliding group (3) face different directions and the second sliding grooves (45) of the i-shaped sliding parts (4) of the same duplex sliding group (3) are correspondingly arranged.

5. A duplex structure pulley capable of simultaneously passing through two rails according to claim 3, wherein the length of the first horizontal portion (41) is greater than that of the second horizontal portion (43), one end of the first horizontal portion (41) far away from the vertical sliding portion (11) exceeds the corresponding end of the second horizontal portion (43), and an inclined sliding portion (46) which is obliquely arranged towards the second sliding groove (45) is arranged between the other end of the first horizontal portion (41) and the vertical sliding portion (11).

6. A duplex structure pulley capable of simultaneously passing through two rails according to claim 3, wherein the upper end of the i-shaped sliding part (4) is provided with a vertical extension part (47) extending upwards from the middle of the first horizontal part (41), the upper end of the vertical extension part (47) extends horizontally towards a horizontal extension part (48) extending away from the vertical sliding part (11), and the transmission medium connecting part (5) is vertically formed on the upper side of one end of the horizontal extension part (48) away from the vertical extension part (47) and the end of the horizontal extension part (48) exceeds one end of the first horizontal part (41) away from the vertical sliding part (11).

7. A duplex structure sled capable of simultaneously passing through two tracks according to claim 6 wherein an auxiliary sliding groove (49) is formed between the horizontal extension (48), the vertical extension (47) and the first horizontal portion (41), and wherein the auxiliary sliding groove (49) is oriented in the same direction as the first sliding groove (44), and wherein an inclined auxiliary portion (31) is provided between the first horizontal portion (41) and the vertical extension (47).

8. The duplex structure pulley capable of simultaneously passing through two tracks according to claim 1, wherein at least two pulley bodies (1) are axially and sequentially distributed adjacently to form a group of pulley blocks, pulley arm connecting parts (2) on the pulley bodies (1) in the same group of pulley blocks are all arranged in pulley mounting grooves (121) at one end of the same pulley arm (12), connecting piece mounting grooves (22) which are mutually communicated are formed in each pulley arm connecting part (2), pulley connecting pieces (23) which are positioned in the pulley mounting grooves (121) are penetrated in the connecting piece mounting grooves (22), and the pulley arm connecting parts (2), the pulley connecting pieces (23) and the pulley arm (12) are fixedly connected.

9. The duplex structure pulley capable of simultaneously passing through two rails according to claim 8, wherein a group of duplex sliding groups (3) are arranged at the upper ends of the vertical sliding parts (11) of the pulley bodies (1) in the same pulley group, the I-shaped sliding parts (4) extend from one axial end to the other axial end of the vertical sliding parts (11), and pulley buckle covers (51) are arranged on one side of the transmission medium connecting parts (5).

10. A duplex structure pulley capable of simultaneously passing through two rails according to claim 1, wherein the upper end of the vertical sliding part (11) of the pulley body (1) is provided with two duplex sliding groups (3), and a movable part installation space (13) between the two duplex sliding groups (3) is arranged on one side of the pulley body (1) away from the transmission medium connecting part (5).