A pulley assembly

Abstract

A pulley assembly relates to but is not limited to the technical field of shower rooms, comprising a fixed seat, a bracket arranged on the fixed seat, a pulley arranged on the bracket and used to be installed in a slide rail, and also comprising a pendulum block and an elastic member rotatably connected to the bracket; the bracket is provided with a first limiting portion, and when the pendulum block rotates to a first position along a first direction under the elastic force of the elastic member, the first limiting portion limits the pendulum block from continuing to rotate; the pendulum block is used to automatically rotate to the first position after the pulley is installed in the slide rail, and cooperate with the slide rail to limit the pulley from falling out of the slide rail. After the pulley of the pulley assembly of the embodiment of the present application is installed in the slide rail, the pendulum block can automatically rotate to the first position to realize automatic adjustment of the anti-slip function.

Description

Technical Field

[0001] The present application relates to but is not limited to the technical field of shower rooms, and specifically to a pulley assembly. Background Art

[0002] The door of a shower room generally adopts a structure in which a pulley and a slide rail cooperate to realize the sliding opening and closing of the door, and the pulley is required to have a certain anti-slip function.

[0003] Although some shower rooms have a pulley anti-slip function, it cannot be automatically adjusted after the pulley is installed, but requires multiple steps of manual adjustment after the pulley is installed. In the actual installation process of the shower room, the pulley's anti-slip function is often not adjusted for various reasons. As a result, the shower room will have the risk of the pulley jumping off the track after a period of use, which will cause serious harm to the user's life safety. Summary of the invention

[0004] The embodiment of the present application provides a pulley assembly, comprising a fixed seat, a bracket arranged on the fixed seat, a pulley arranged on the bracket and used to be installed in a slide rail, and also comprising a pendulum block and an elastic member rotatably connected to the bracket;

[0005] The bracket is provided with a first limiting portion, and when the pendulum block rotates to a first position along a first direction under the elastic force of the elastic member, the first limiting portion limits the pendulum block from continuing to rotate;

[0006] The swing block is used to automatically rotate to the first position after the pulley is installed in the slide rail, and cooperate with the slide rail to limit the pulley from escaping from the slide rail.

[0007] Beneficial effects:

[0008] In the pulley assembly of the embodiment of the present application, after the pulley is installed in the slide rail, the swing block can automatically rotate to the first position under the elastic force of the elastic member, and cooperate with the slide rail to prevent the pulley from slipping out of the slide rail. In this way, after the pulley is installed in the slide rail, the swing block automatically rotates to the anti-slip position, that is, the anti-slip function is automatically adjusted, and multiple manual adjustments are not required. The installation is convenient and provides a strong guarantee for the user's life safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0010] Figure 1 is an exploded view of the pulley assembly of the first embodiment;

[0011] Figure 2 for Figure 1 A schematic diagram of the structure of the pendulum block in FIG.

[0012] Figure 3 for Figure 1 A schematic diagram of the structure of the pendulum block in another viewing angle;

[0013] Figure 4 for Figure 1 A schematic diagram of the structure of the connecting seat in FIG.

[0014] Figure 5 for Figure 1 A schematic diagram of the structure of the connecting seat in another viewing angle;

[0015] Figure 6 for Figure 1 A schematic structural diagram of the pulley assembly when the pendulum block is in the first position;

[0016] Figure 7 for Figure 6 A side view of a pulley assembly;

[0017] Figure 8 for Figure 6 A top view of a pulley assembly;

[0018] Fig. 9 for Figure 6 a rear view of the pulley assembly;

[0019] Fig.10 for Fig. 9 Sectional view at AA in the middle;

[0020] Fig.11 for Fig. 9 Sectional view at the middle BB;

[0021] Fig.12 for Figure 1 A schematic structural diagram of the pulley assembly when the pendulum block rotates in the opposite direction from the first position to a certain middle position;

[0022] Fig.13 for Fig.12 A cross-sectional view of a pulley assembly;

[0023] Fig.14 for Fig.12 Another cross-sectional view of the pulley assembly;

[0024] Fig.15 for Figure 1 A schematic structural diagram of the pulley assembly when the pendulum block rotates in the opposite direction from the first position to the extreme position;

[0025] Fig.16 for Fig.15 A cross-sectional view of a pulley assembly;

[0026] Fig.17 for Fig.15 Another cross-sectional view of the pulley assembly;

[0027] Fig.18 is a structural schematic diagram of the slide rail;

[0028] Fig.19 for Figure 1 A schematic diagram of the structure of a pulley assembly in a certain state during installation;

[0029] Fig. 20 for Figure 1 A schematic diagram of the structure of the pulley assembly after being installed in the slide rail;

[0030] Fig.21 is an exploded view of the pulley assembly of the second embodiment;

[0031] Fig. 22 for Fig.21 A schematic diagram of the structure of the first pendulum block in FIG.

[0032] Fig.23 for Fig.21 A schematic diagram of the structure of the first pendulum block in another viewing angle;

[0033] Fig.24 for Fig.21 A schematic diagram of the structure of the bracket in FIG.

[0034] Fig.25 for Fig.21 A schematic structural diagram of the pulley assembly when the first pendulum block and the second pendulum block are both in the first position;

[0035] Fig.26 for Fig.25 A side view of a pulley assembly;

[0036] Fig. 27 for Fig.25 a rear view of the pulley assembly;

[0037] Fig.28 for Fig. 27 Sectional view at the middle BB;

[0038] Fig.29 for Fig.25 A top view of a pulley assembly;

[0039] Fig.30 for Fig.29 Sectional view at AA in the middle;

[0040] Fig.31 for Fig.21 A schematic structural diagram of the pulley assembly when the first pendulum block and the second pendulum block are both in the second position;

[0041] Fig.32 for Fig.31 a rear view of the pulley assembly;

[0042] Fig.33 for Fig.32 Sectional view at the middle BB;

[0043] Fig.34 for Fig.21 A structural schematic diagram of the pulley assembly when the first swing block and the second swing block have just escaped from the restriction of the second limiting portion;

[0044] Fig.35 for Fig.21 A schematic diagram of the structure of the pulley assembly when it just enters the track entrance of the slide rail;

[0045] Fig.36 for Fig.21 A schematic diagram of the structure of the pulley assembly after being installed in the slide rail;

[0046] Fig.37 for Fig.21 A force state diagram of the pulley assembly when it is subjected to the force applied by the inner top surface of the track during use;

[0047] The accompanying drawings are marked as follows:

[0048] 1. The first pulley,

[0049] 2. swing block, 21. connecting arm, 211. shaft hole, 212. lower end surface of connecting arm, 213. arc-shaped transition surface, 22. bottom of open groove, 23. protrusion,

[0050] 3. Nut, 4. Fixing seat, 5. Bolt, 6. Bolt, 7. Second pulley, 8. Screw,

[0051] 9. bracket, 91. square boss, 92. second boss, 93. third limiter, 94. first boss, 95. protruding shaft, 96. first slot,

[0052] 10. Connecting seat, 101. Boss, 1011. Top surface of boss, 102. Fixing plate, 1021. Arc transition surface, 1022. Upper end surface of fixing plate, 1023. Shaft hole, 103. Square groove, 104. Fixing hole,

[0053] 11. screw, 12. elastic member, 13. shaft, 14. screw,

[0054] 15. Slide rail, 151. Top edge of rail entrance, 152. Inner top surface of rail, 153. Bottom edge of rail entrance, 154. Rail,

[0055] 16. first swing block, 161. swing arm, 1611. baffle, 1612. protrusion, 1613. shaft hole, 1614. second slot, 162. top plate, 1621. convex rib,

[0056] 17. Screws, 18. Elastic member, 19. Second pendulum block. DETAILED DESCRIPTION

[0057] The technical solution of the present application is further described below in conjunction with the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application.

[0058] Embodiment 1

[0059] like Figure 1-Figure 20 As shown, this embodiment provides a pulley assembly, including a fixed seat 4, a bracket 9 arranged on the fixed seat 4, a pulley arranged on the bracket 9 and used for being installed in a slide rail 15, a pendulum block 2 rotatably connected to the bracket 9, and an elastic member 12.

[0060] The bracket 9 is provided with a first limiting portion. When the pendulum block 2 rotates to the first position along the first direction under the elastic force of the elastic member 12, the first limiting portion limits the pendulum block 2 from continuing to rotate; the pendulum block 2 is used to automatically rotate to the first position after the pulley is installed in the slide rail 15, and cooperate with the slide rail 15 to limit the pulley from escaping from the slide rail 15.

[0061] In the pulley assembly of this embodiment, after the pulley is installed in the slide rail 15, the pendulum block 2 can automatically rotate to the first position under the elastic force of the elastic member 12, and cooperate with the slide rail 15 to prevent the pulley from slipping out of the slide rail 15. In this way, after the pulley is installed in the slide rail 15, the pendulum block 2 automatically rotates to the anti-slip position, that is, the anti-slip function is automatically realized, and multiple manual adjustments are not required. The installation is convenient and provides a strong guarantee for the user's life safety.

[0062] In this embodiment, during the process of installing the pulley in the slide rail 15 , the swing block 2 can overcome the elastic force and rotate in the opposite direction under the action of the slide rail 15 , so that the pulley enters the slide rail 15 .

[0063] When the pendulum block 2 is in the first position, the upper end surface of the pendulum block 2 is higher than the upper end surface of the pulley. In this way, after the pulley is installed in the track 154 of the slide rail 15, the pendulum block 2 can cooperate with the inner top surface 152 of the track to limit the pulley from escaping the slide rail 15.

[0064] like Figure 1-Figure 6As shown, exemplarily, the pulley assembly further includes a connecting seat 10 disposed on the bracket 9 , the pendulum block 2 is rotatably connected to the connecting seat 10 , and the first limiting portion is disposed on the connecting seat 10 .

[0065] Two fixing plates 102 are arranged opposite to each other on the connecting seat 10, and two connecting arms 21 are correspondingly arranged on the pendulum block 2, and the two connecting arms 21 are rotatably connected to the two fixing plates 102 via a rotating shaft 13. The two connecting arms 21 are respectively located on the outer sides of the two fixing plates 102, and the two fixing plates 102 are provided with shaft holes 1023 for the rotating shaft 13 to pass through, and the two connecting arms 21 are correspondingly provided with shaft holes 211 for rotatably connecting with the two ends of the rotating shaft 13.

[0066] like Fig.10 , Figure 2-Figure 5 As shown, the elastic member 12 may be a torsion spring, and is disposed between the connecting seat 10 and the pendulum block 2. The torsion spring may be sleeved on the rotating shaft 13 and located between the two fixing plates 102, one end leg of the torsion spring abuts against the pendulum block 2, and the other end leg abuts against the connecting seat 10. An open slot is formed between the two connecting arms 21 at the bottom of the pendulum block 2, and the torsion spring is located in the open slot. A protrusion 23 extending from the bottom of the slot to the slot opening is provided on one side of the open slot, and one end leg of the torsion spring abuts against the inner side surface of the protrusion 23, and the other end leg abuts against the top surface of the connecting seat 10.

[0067] like Figure 1-Figure 5 As shown, the first limiting portion may include a boss 101 disposed outside the fixing plate 102. When the swing block 2 is in the first position, the lower end surface 212 of the connecting arm 21 abuts against the boss 101, that is, abuts against the top surface 1011 of the boss. Figure 6 The lower end surface 212 of the connecting arm 21 and one side thereof are connected by a smooth transition, and a curved transition surface 213 can be used for a smooth transition to avoid the boss 101 during its rotation, see Fig.12 and Fig.15 Among them, one boss 101 may be provided on the outer side of each of the two fixing plates 102, and the two bosses 101 cooperate with the two connecting arms 21 to achieve position limiting.

[0068] like Figure 1-Figure 5 As shown, the first limiting portion may also include two fixing plates 102. When the pendulum block 2 is in the first position, the upper end surface 1022 of the fixing plate 102 abuts against the groove bottom 22 of the open groove to limit the pendulum block 2 from continuing to rotate. Fig.11The upper end surface of the fixed plate 102 and one side thereof are connected by a smooth transition, and a curved transition surface 1021 can be used for a smooth transition, so as to avoid the pendulum block 2 during the rotation of the pendulum block 2, that is, to avoid the bottom 22 of the opening groove, see Fig.14 and Fig.17 .

[0069] like Figure 8 As shown, the swing block 2 and the pulley can be both arranged outside the bracket 9, and the swing block 2 is located on the walking track of the pulley when it is in the first position. In this way, after the pulley is installed in the slide rail 15, when the swing block 2 is in the first position, the overall width of the swing block 2 and the pulley is not too large, and the cavity of the slide rail 15 for accommodating the swing block 2 and the pulley does not need to be too large, saving space.

[0070] like Figure 1-Figure 6 The connection method of the fixing seat 4, the bracket 9 and the connecting seat 10 is not limited, and the three mainly play a bearing role. Exemplarily, a fixing hole is provided on the top plate 162 and the bottom plate of the fixing seat 4, and a bolt 6 is inserted into the two fixing holes, and the end of the bolt 6 is fastened by the nut 3 of the top plate 162 of the fixing seat 4. A receiving groove for accommodating glass is provided on one side of the fixing seat 4, and the glass is tightened by the bolt 5 set on the side wall of the receiving groove. The bracket 9 is threadedly connected to the bolt 6 through the threaded hole set therein, and the left and right ends of the outer side of the bracket 9 are rotatably connected to a pulley, respectively, the first pulley 1 and the second pulley 7, and the first pulley 1 and the second pulley 7 are rotatably installed on the bracket 9 by a screw (screw 14 and screw 8). A square boss 91 is provided in the middle position of the outer side of the bracket 9, and a threaded hole is provided in the square boss 91. The side of the connecting seat 10 is provided with a square groove 103 that matches the square boss 91. The connecting seat 10 is fixed to the square boss 91 by passing a screw 11 through a fixing hole 104 provided on the connecting seat 10. The end of the screw 11 is screwed into a threaded hole in the square boss 91. Two fixing plates 102 are provided on the top surface of the connecting seat 10 in opposite directions.

[0071] In the pulley assembly of this embodiment, the vertical distance between the upper end surface of the pendulum block 2 and the lower end surface of the pulley is defined as A x When no external force is applied, the pendulum block 2 is limited to the first position by the first limiting portion. The first position is the anti-drop position of the pendulum block 2 and also the initial position of the pendulum block 2. When the pendulum block 2 is in the first position, A x =A1, then A x The value of is the largest. At this time, the overall state of the pulley assembly can be seen Figure 6-Figure 11 When the pendulum 2 rotates in the opposite direction to a certain middle position under the push of external force, A x =A2, the overall state of the pulley assembly can be seen in Figure 12-14When the pendulum 2 rotates in the opposite direction to the limit position under the external force, A x =A3, then A x The value of is the smallest. At this time, the overall state of the pulley assembly can be seen Figure 15-17 . Among them, A1>A2>A3.

[0072] like Fig.18 As shown, in actual application, the pulley assembly needs to be installed on the slide rail 15, and the slide rail 15 is provided with a cavity for accommodating the pulley, and a track 154 for the pulley to slide is formed on the bottom surface of the cavity, and the top surface of the cavity is the inner top surface 152 of the track, and the opening on one side of the cavity forms the track entrance of the slide rail 15. The height dimension of the track entrance is B, and the dimension B is designed to be smaller than A1, such as B = A1-3.2; the height dimension of the pulley running (i.e., the height dimension between the bottom surface of the track 154 and the inner top surface 152 of the track) is C, and the dimension C is designed to be slightly larger than A1, such as C = A1+0.5.

[0073] like Figure 18-Figure 20 As shown, during the installation of the pulley assembly, the top edge 151 of the track entrance will apply a thrust F to the pendulum block 2. Under the action of the thrust, the pendulum block 2 overcomes the elastic force and rotates in the opposite direction. When the pendulum block 2 rotates in the opposite direction to A x = B, the pulley can enter the track 154 of the slide rail 15. After the pulley enters the track 154, the thrust F disappears, and the pendulum block 2 can automatically rotate to the first position along the first direction under the elastic force of the elastic member 12 (the elastic member 12 can also have elastic force in the first position, so that the pendulum block 2 has a tendency to rotate along the first direction). At this time, A x =A1>B, thereby preventing the pulley from falling off the track 154. Further, when the pulley is pulled outward horizontally, since there is no force to cause the swing block 2 to rotate in the opposite direction, the swing block 2 will not rotate in the opposite direction, so the pulley cannot fall off the track 154. In addition, the sizes of B, C and A1 can be designed according to actual needs. In this embodiment, the size difference between C and A1 is designed to be 0.5 mm. Since the gap of 0.5 mm is much smaller than the industry operating gap (more than 1 mm), the pulley shakes less up and down during operation, and the operation is more stable.

[0074] Embodiment 2

[0075] like Figure 21-Figure 37 As shown, this embodiment provides a pulley assembly, including a fixed seat 4, a bracket 9 arranged on the fixed seat 4, a pulley arranged on the bracket 9 and used for being installed in a slide rail 15, a pendulum block rotatably connected to the bracket 9, and an elastic member 18.

[0076] The bracket 9 is provided with a first limiting portion. When the pendulum block rotates to the first position along the first direction under the elastic force of the elastic member 18, the first limiting portion limits the continued rotation of the pendulum block. The pendulum block is used to automatically rotate to the first position after the pulley is installed in the slide rail 15, and cooperate with the slide rail 15 to limit the pulley from escaping from the slide rail 15.

[0077] In the pulley assembly of this embodiment, after the pulley is installed in the slide rail 15, the swing block can automatically rotate to the first position under the elastic force of the elastic member 18, and cooperate with the slide rail 15 to prevent the pulley from slipping out of the slide rail 15. In this way, after the pulley is installed in the slide rail 15, the swing block automatically rotates to the anti-slip position, that is, the anti-slip function is automatically realized, and multiple manual adjustments are not required. The installation is convenient and provides a strong guarantee for the user's life safety.

[0078] In this embodiment, a second limiting portion is further provided on the bracket 9, and the second limiting portion is used to limit the pendulum block to the second position. When the pendulum block is in the second position, the elastic member 18 has elastic force; when the pulley is installed in the slide rail 15, the pendulum block can be released from the restriction of the second limiting portion under the action of the slide rail 15 and then rotate to the first position.

[0079] The swing block is provided with a first position-limiting matching portion for matching with the first position-limiting portion, and a second position-limiting matching portion for matching with the second position-limiting portion; under the action of the slide rail 15, the second position-limiting matching portion is elastically deformed and passes through the second position-limiting portion.

[0080] like Figure 21-24 , Fig.28 As shown, exemplarily, the swing block includes a swing arm 161, which is rotatably arranged on one side of the bracket 9, and the first limiting matching portion and the second limiting matching portion are provided on the swing arm 161; the elastic member 18 is a coil spring, and the coil spring is provided between the swing arm 161 and the bracket 9. Among them, the bracket 9 is provided with a protruding shaft 95 on one side opposite to the swing arm 161, and the swing arm 161 is provided with an axis hole 1613 that is rotatably matched with the protruding shaft 95, and one end of the protruding shaft 95 extending out of the axis hole 1613 is fixed with a screw 17, and the end of the screw 17 is screwed into a threaded hole provided in the protruding shaft. The coil spring can be sleeved on the outside of the protruding shaft 95, the side of the bracket 9 is provided with a first slot 96 around the protruding shaft 95, the side of the swing arm 161 is provided with a second slot 1614 around the shaft hole 1613, and the coil spring can be confined in the accommodating cavity surrounded by the first slot 96 and the second slot 1614.

[0081] like Figure 22-Figure 26 , Fig.31As shown, the first position-limiting portion may include a first boss 94 provided on the bracket 9, and the second position-limiting portion may include a second boss 92 provided on the bracket 9; the first position-limiting matching portion includes a baffle 1611 provided on the swing arm 161, and the second position-limiting matching portion includes a protrusion 1612 provided on the baffle 1611; when the swing block rotates to the first position, the baffle 1611 abuts against the first boss 94. The baffle 1611 is provided on a side surface of the swing arm 161 relative to the bracket 9, and the baffle 1611 may be arc-shaped, and the protrusion 1612 is provided on the side surface of the baffle 1611 relative to the bracket 9.

[0082] like Fig.24 As shown, the bracket 9 may also be provided with a third limiting portion 93, and the third limiting portion 93 is used to abut against the baffle 1611 when the swing block rotates in the opposite direction from the second position to the set position. The third limiting portion 93 may include a third boss.

[0083] like Fig. 22 , Fig.23 , Fig.25 As shown, the swing block may further include a top plate 162 connected to one end of the swing arm 161, and the other end of the swing arm 161 is rotatably disposed on the bracket 9. The swing arm 161 and the pulley are respectively disposed on opposite sides of the bracket 9, and the top plate 162 extends to the side where the pulley is located. When the swing block is in the first position, the upper end surface of the top plate 162 is higher than the upper end surface of the pulley. After the pulley is installed in the track 154 of the slide rail 15, the top plate 162 of the swing block cooperates with the inner top surface 152 of the track to prevent the pulley from escaping from the track 154.

[0084] like Fig. 22 , Fig.23 As shown, a convex rib 1621 may be provided on the top surface of the top plate 162. The convex rib 1621 is eccentrically arranged and when the pendulum block is in the first position, when the convex rib 1621 is subjected to the downward force of the slide rail 15, a torque is generated to rotate the pendulum block in the first direction. Fig.37 As shown, the vertical plane passing through the rotation center of the pendulum block is defined as the center plane t, and the rib 1621 is eccentrically arranged, that is, the vertical plane where the rib 1621 is located is arranged away from the center plane t. Then, when the pendulum block is in the first position, when the rib 1621 is subjected to the downward force F1 of the slide rail 15, F1 is the force that causes the pendulum block to rotate in the first direction, which is consistent with the elastic member 18 urging the pendulum block to rotate in the first direction, so the pendulum block will not rotate in the opposite direction.

[0085] like Fig.21 , Figure 25-30As shown, in this embodiment, the connection method of the fixing seat 4 and the bracket 9 is not limited, and the connection method of the two can be the same as that of the first embodiment. For example, a fixing hole is provided on the top plate 162 and the bottom plate of the fixing seat 4, and a bolt 6 is inserted into the two fixing holes, and the end of the bolt 6 is fastened by the nut 3 of the top plate 162 of the fixing seat 4. A receiving groove for accommodating glass is provided on one side of the fixing seat 4, and the glass is tightened by the bolt 5 arranged on the side wall of the receiving groove. The bracket 9 is threadedly connected to the bolt 6 through the threaded hole arranged in the middle position thereof, and the left and right ends of the outer side of the bracket 9 are respectively rotatably connected to a pulley, which are the first pulley 1 and the second pulley 7, respectively, and the first pulley 1 and the second pulley 7 are rotatably mounted on the bracket 9 by a screw (screw 14 and screw 8). The left and right ends of the inner side of the bracket 9 are respectively rotatably connected to a swing block, which are the first swing block 16 and the second swing block 19. A first boss 94 is provided on the top surface of the bracket 9, a third boss is provided on the bottom surface of the bracket 9, and a second boss 92 is provided on the arc-shaped connecting surface between the top surface and the bottom surface of the end of the bracket 9.

[0086] In the pulley assembly of this embodiment, the vertical distance between the upper end surface of the swing block and the lower end surface of the pulley is defined as A x The initial position of the swing block is the second position. At this time, the upper end surface of the swing block is lower than the upper end surface of the pulley, and the lower end surface of the swing block is flush with or slightly lower than the lower end surface of the pulley. The height dimension of the pulley is A. At this time, A x Approximately equal to A; when the pendulum is in the first position (i.e., the anti-slip position), A x =A1, then A x The value of is the largest.

[0087] like Fig.18 As shown, in actual application, the pulley assembly needs to be installed on the slide rail 15, and the slide rail 15 is provided with a cavity for accommodating the pulley, and a track 154 for the pulley to slide is formed on the bottom surface of the cavity, and the top surface of the cavity is the inner top surface 152 of the track, and the opening on one side of the cavity forms the track entrance of the slide rail 15. The height dimension of the track entrance is B, and the dimension B is designed to be smaller than A1, and the dimension B is equal to or slightly larger than the height dimension A of the pulley, such as B = A1-3.2; the height dimension of the pulley running (i.e., the height dimension between the bottom surface of the track 154 and the inner top surface 152 of the track) is C, and the dimension C is designed to be slightly larger than A1, such as C = A1+0.5.

[0088] like Fig.18 , Figure 35-Figure 37As shown, during the installation of the pulley assembly, the bottom edge 153 of the track entrance will apply a thrust to the top plate 162 of the pendulum block. After the thrust forces the pendulum block to break away from the restriction of the second boss 92, the pendulum block automatically rotates to the first position under the elastic force of the elastic member 18. At this time, the pulley is installed in the track 154 of the slide rail 15. At this time, since A1>B, the pulley can be prevented from escaping from the track 154. In actual operation, if the pulley assembly shakes upward, the rib 1621 on the top plate 162 of the pendulum block will touch the inner top surface 152 of the track. When the rib 1621 is subjected to the force F1 applied downward by the inner top surface 152 of the track, F1 is the force that causes the pendulum block to rotate in the first direction, which is consistent with the elastic member 18 causing the pendulum block to rotate in the first direction. Therefore, the pendulum block will not rotate in the opposite direction, so A1>B ... x It is always equal to A1 and greater than B, so it can always prevent the pulley from deviating from the track 154. In addition, the sizes of B, C and A1 can be designed according to actual needs. In this embodiment, the size difference between C and A1 is designed to be 0.5 mm. Because the gap of 0.5 mm is much smaller than the industry running gap (more than 1 mm), the up and down shaking of the pulley is small during operation, and the operation is more stable.

[0089] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "connection", "fixed connection", "installation", and "assembly" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", and "fixed connection" can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

Claims

1. A pulley assembly, comprising a fixed seat, a bracket arranged on the fixed seat, and a pulley arranged on the bracket and used to be installed in a slide rail, characterized in that: It also includes a pendulum block and an elastic member rotatably connected to the bracket; The bracket is provided with a first limiting portion, and when the pendulum block rotates to the first position along the first direction under the elastic force of the elastic member, the first limiting portion limits the pendulum block from continuing to rotate; when the pendulum block is in the first position, the upper end surface of the pendulum block is higher than the upper end surface of the pulley; The swing block is used to automatically rotate to the first position after the pulley is installed in the slide rail, and cooperate with the slide rail to prevent the pulley from escaping from the slide rail; Wherein, the slide rail is provided with a cavity for accommodating the pulley, and a track entrance is arranged on one side of the cavity, the height dimension of the track entrance is smaller than the vertical distance between the upper end surface of the pendulum block and the lower end surface of the pulley when the pendulum block is in the first position, and the height dimension of the pulley operation is greater than the vertical distance between the upper end surface of the pendulum block and the lower end surface of the pulley when the pendulum block is in the first position.

2. The pulley assembly according to claim 1, characterized in that: When the pulley is installed in the slide rail, the swing block can overcome the elastic force and rotate in the opposite direction under the force of the slide rail, so that the pulley enters the slide rail.

3. The pulley assembly according to claim 2, characterized in that: The pulley assembly further comprises a connecting seat arranged on the bracket, and the pendulum block is rotatably connected to the connecting seat; Two fixing plates are arranged opposite to each other on the connecting seat, and two connecting arms are correspondingly arranged on the swing block, and the two connecting arms are rotatably connected to the two fixing plates via a rotating shaft; The elastic member is a torsion spring and is arranged between the connecting seat and the pendulum block; The first limiting portion is arranged on the connecting seat.

4. The pulley assembly according to claim 3, characterized in that: The first limiting portion includes a boss disposed on the outer side of the fixing plate, and when the swing block is in the first position, the lower end surface of the connecting arm abuts against the boss; The lower end surface of the connecting arm and one side surface thereof are connected in a smooth transition so as to avoid the boss during the rotation process.

5. The pulley assembly according to claim 3 or 4, characterized in that: The first limiting portion includes two fixing plates, and when the swing block is in the first position, the upper end surfaces of the fixing plates abut against the swing block; The upper end surface of the fixing plate and one side surface thereof are connected in a smooth transition so as to avoid the pendulum block during the rotation of the pendulum block.

6. The pulley assembly according to claim 3, characterized in that: The torsion spring is sleeved on the rotating shaft and is located between the two fixing plates. One end leg of the torsion spring abuts against the pendulum block, and the other end leg abuts against the connecting seat.

7. The pulley assembly according to claim 3, characterized in that: The swing block and the pulley are both arranged on the outside of the bracket, and the swing block is located on the walking track of the pulley when it is in the first position.

8. The pulley assembly according to claim 1, wherein: The bracket is further provided with a second limiting portion, and the second limiting portion is used to limit the swing block to a second position, and the elastic member has elastic force when the swing block is in the second position; When the pulley is installed in the slide rail, the swing block can be released from the restriction of the second limiting portion and rotate to the first position under the force of the slide rail.

9. The pulley assembly according to claim 8, characterized in that: The swing block is provided with a first position-limiting matching portion for matching with the first position-limiting portion, and a second position-limiting matching portion for matching with the second position-limiting portion; under the action of the slide rail, the second position-limiting matching portion is elastically deformed and passes through the second position-limiting portion.

10. The pulley assembly according to claim 9, characterized in that: The swing block comprises a swing arm, the swing arm is rotatably arranged at one side of the bracket, and the first position-limiting matching portion and the second position-limiting matching portion are arranged on the swing arm; The elastic member is a coil spring, and the coil spring is arranged between the swing arm and the bracket.

11. The pulley assembly according to claim 10, characterized in that: The first limiting portion includes a first boss disposed on the bracket, and the second limiting portion includes a second boss disposed on the bracket; The first position-limiting matching portion includes a baffle plate arranged on the swing arm, and the second position-limiting matching portion includes a protrusion arranged on the baffle plate; when the swing block rotates to the first position, the baffle plate abuts against the first protrusion.

12. The pulley assembly according to claim 11, characterized in that: The bracket is also provided with a third limiting portion, and the third limiting portion is used to abut against the baffle when the pendulum block rotates in the opposite direction from the second position to the set position.

13. The pulley assembly according to claim 10, wherein: The swing block also includes a top plate connected to one end of the swing arm, and the other end of the swing arm is rotatably disposed on the bracket; The swing arm and the pulley are respectively arranged on two opposite sides of the bracket, the top plate extends to the side where the pulley is located, and when the swing block is in the first position, the upper end surface of the top plate is higher than the upper end surface of the pulley.

14. The pulley assembly according to claim 13, wherein: A convex rib is provided on the top surface of the top plate. The convex rib is eccentrically arranged and when the pendulum block is in the first position, when the convex rib is subjected to the downward force of the slide rail, a torque is generated to rotate the pendulum block in the first direction.

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