CN209353932U - Pulley Assembly and Shower Enclosure - Google Patents

Abstract

The utility model proposes a kind of pulley assembly and shower house, which includes: pulley, and pulley is for installation into guide rail；Axle sleeve, axle sleeve have mounting hole；Outer shaft, outer shaft are installed on mounting hole, and outer shaft and mounting hole are coupled prevent outer shaft in mounting hole from rotating, and pass through sliding door by outer shaft and pulley assembly can be made to be installed on sliding door with appended claims；And eccentric shaft, eccentric shaft includes base portion, shaft and eccentric part, shaft and eccentric part are located at the two sides of base portion, base portion is contained in mounting hole, the axis of eccentric part and the axis of base portion are staggered, pulley is rotatably connected to eccentric part, and shaft is inserted into outer shaft, keeps shaft dynamic in outer shaft transfer.By using above-mentioned technical proposal, the utility model proposes pulley assembly without tool, rotate eccentric shaft by rotating spiral cover, to realize the adjusting of height of pulley, the effect after adjusting can be observed directly.

Description

Pulley Assembly and Shower Enclosure

technical field

The utility model belongs to an adjustable pulley, in particular to a pulley assembly and a shower room.

Background technique

The sliding door of the existing shower room is equipped with a pulley assembly. The sliding door can be opened and closed by sliding the pulley assembly along the guide rail. height adjustment.

As shown in FIG. 1 , the existing pulley assembly includes a pulley 10 , an eccentric block 20 and a nut 30 . The pulley 10 is rotatably connected to the eccentric block 20, and the eccentric shaft of the eccentric block 20 passes through the sliding door and is connected with the nut 30, so that the pulley assembly is installed on the sliding door. When needing to adjust the pulley 10, the pulley assembly will be removed from the sliding door earlier, then the eccentric block 20 is rotated to adjust the position of the pulley 10, and then the pulley assembly is installed to see whether the adjusted sliding door position is suitable. Therefore, repeated adjustments are required to ensure that the sliding door is normally sucked and closed without water leakage. The adjustment process requires repeated installation, which is time-consuming and laborious, and the adjustment is difficult.

As shown in FIG. 2 , another conventional pulley assembly includes a pulley 10 , an adjusting portion 40 , a mounting portion 50 and a screw 60 , and the pulley assembly is mounted on a sliding door through the mounting portion 50 . The pulley 10 is rotatably connected to the adjustment part 40 , the adjustment part 40 can slide up and down along the installation part 50 , the screw rod 60 is screwed into and passes through the installation part 50 , and the adjustment part 40 can slide along the installation part 50 by the rotation of the screw rod 60 . When adjusting the pulley 10, a special tool is needed to turn the screw rod 60, so the operation is inconvenient and the adjustment is difficult.

Utility model content

Based on the above-mentioned problems in the prior art, the utility model aims to provide a pulley assembly and a shower room, so as to solve the problems that the adjustment operation of the pulley assembly in the prior art is difficult and the adjustment effect is not intuitive.

The utility model provides a pulley assembly on the one hand, it comprises:

a pulley for mounting to a rail, the pulley being capable of moving the pulley assembly along the rail;

A shaft sleeve, the shaft sleeve has a mounting hole;

fastener;

an outer shaft, the outer shaft is installed in the installation hole, and the outer shaft and the installation hole are fitted so that the outer shaft cannot rotate in the installation hole, the outer shaft passes through the sliding door and Cooperating with the fastener can make the pulley assembly mounted on the sliding door, at least a part of the sleeve and the pulley are located on one side of the sliding door, and the fastener is located on the sliding door the other side of the

An eccentric shaft, the eccentric shaft includes a base, a shaft portion and an eccentric portion, the shaft portion and the eccentric portion are located on both sides of the base, the base is accommodated in the mounting hole, the axis of the eccentric portion The axis of the base part is staggered, the pulley is rotatably connected to the eccentric part, the rotating shaft part is inserted into the outer shaft,

The pulley assembly has an adjusting state and an operating state, in which the rotating shaft part can rotate in the outer shaft, and in the operating state, the eccentric shaft is fixed and cannot rotate.

Preferably, the pulley assembly further includes a rotating cover, the rotating cover is installed on the rotating shaft part, and the rotating shaft part can be rotated in the outer shaft, so that the eccentric shaft can be rotated together with the rotating cover turn.

Preferably, the pulley assembly further includes a first spacer, and the first spacer is located between the bushing and the sliding door.

Preferably, the pulley assembly has a protrusion, and the screw cap has a groove. In the working state, the protrusion and the groove can be matched to make the groove blocked by the protrusion so that The screw cap cannot be rotated, and the protrusion and the groove are disengaged in the adjusted state, so that the screw cap can be rotated.

Preferably, the pulley assembly further includes a second gasket, the protrusion is disposed on the second gasket, the second gasket is located between the fastener and the sliding door, and the first gasket is located between the fastener and the sliding door. Two spacers are sleeved on the outer shaft, and the second spacer and the outer shaft are fitted together so that they cannot rotate relative to each other, and the protrusion is arranged on the second spacer along the circumferential direction the outer periphery of the second gasket;

The screw cap includes a bottom and a wall formed along the circumference of the bottom, the wall is provided with a groove that fits with the protrusion of the second gasket, through the groove and the The protrusions are engaged so that the screw cap cannot rotate relative to the second gasket.

Preferably, the bottom of the screw cap is provided with a matching part, and the rotating shaft part is provided with a hole, and the matching part can be inserted into the hole, through the rotating cover and the rotating shaft part along the move axially so that the pulley assembly switches between the working state and the regulating state,

In the working state, the groove of the screw cap is engaged with the protrusion of the second gasket,

In the adjusted state, the groove of the screw cap is disengaged from the protrusion of the second washer.

Preferably, both the cross-sectional shape of the fitting portion and the cross-sectional shape of the hole are non-circular.

Preferably, the fastener includes a nut and a nut sleeve, the nut and the nut sleeve are arranged coaxially, the nut is embedded into the nut sleeve, and the outer periphery of the nut sleeve is formed with a The radially outer protruding first clamping part of the nut sleeve; the screw cap is provided with a second clamping part, and when the screw cover is away from the rotating shaft part, the second clamping part can be connected with the The first fastening part cooperates.

Preferably, in the working state, the distance between the first engaging portion and the second engaging portion is greater than the thickness of the second gasket, so that the first engaging portion and the When the second engaging portion engages, the groove of the screw cap and the protrusion of the second gasket are separated from each other.

Another aspect of the utility model provides a shower room, which includes a sliding door, a guide rail and the pulley assembly described in any one of the above technical solutions.

By adopting the above technical solution, the pulley assembly proposed by the utility model does not need to loosen the fastener when the eccentric shaft is rotated in the adjustment state, so the eccentric shaft can be rotated without the use of tools, thereby realizing the adjustment of the height of the pulley. The effect can be observed directly.

The shower room proposed by the utility model can rotate the eccentric shaft by rotating the screw cover, thereby realizing the lifting adjustment of the sliding door, ensuring the sealing performance of the sliding door, and preventing water leakage.

Description of drawings

Fig. 1 shows a schematic structural diagram of a pulley assembly according to the prior art.

Fig. 2 shows a schematic structural diagram of another pulley assembly according to the prior art.

Fig. 3 shows a schematic structural view of a shower room according to an embodiment of the present invention.

Fig. 4 shows a partial cross-sectional view of the sliding door of the shower room in the lowest position according to the embodiment of the present invention.

Fig. 5 shows a partial cross-sectional view of the sliding door of the shower room in the highest position according to the embodiment of the present invention.

Fig. 6 shows a schematic structural diagram of a pulley assembly according to an embodiment of the present invention.

Fig. 7 shows a structural schematic view of another angle of the pulley assembly according to the embodiment of the present utility model.

Fig. 8 shows a schematic structural view of the pulley assembly in which the eccentric shaft and the outer shaft are installed on the shaft sleeve according to the embodiment of the present utility model.

Fig. 9 shows a structural schematic diagram of another angle in which the eccentric shaft and the outer shaft of the pulley assembly are installed on the shaft sleeve according to the embodiment of the present utility model.

Fig. 10 shows a schematic structural view of the eccentric shaft of the pulley assembly according to the embodiment of the present utility model.

Fig. 11 shows a schematic structural view of the outer shaft of the pulley assembly according to the embodiment of the present invention.

Fig. 12 shows a schematic structural view of a shaft sleeve of a pulley assembly according to an embodiment of the present invention.

Fig. 13 shows a schematic structural diagram of a nut sleeve of a pulley assembly according to an embodiment of the present invention.

Fig. 14 shows a schematic structural diagram of the nut and the nut sleeve of the pulley assembly installed together according to the embodiment of the present utility model.

Fig. 15 shows a schematic structural view of the sawtooth washer of the pulley assembly according to the embodiment of the present utility model.

Fig. 16 shows a schematic structural view of the rotary cover of the pulley assembly according to the embodiment of the present invention.

Fig. 17 shows a schematic structural view of the installation of the pulley assembly (not shown) and the sliding door according to the embodiment of the present invention.

Explanation of reference signs

10 pulley 20 eccentric block 30 nut 40 adjustment part 50 installation part 60 screw rod

1 Pulley assembly 2 Guide rail 3 Sliding door

11 Shaft sleeve 111 Second mounting hole 112 Third matching part 113 Cover plate 114 Convex part

12 pulleys

13 Eccentric shaft 131 Base 132 Shaft 133 Eccentric 134 Hole 135 Threaded hole

14 Outer shaft 141 First mounting hole 142 Limiting part 143 Second fitting part 144 Thread 145 First fitting part

15 first spacer

16 The second spacer 161 The third mounting hole 162 Protrusion

17 nuts

18 Nut sleeve 181 Fixed part 182 Fourth matching part 183 First clamping part 184 Ring part

19 Screw cap 191 Bottom 192 Wall 193 Groove 194 Anti-slip part 195 Second clamping part 196 Fifth matching part.

Detailed ways

Exemplary embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the utility model, and are not intended to exhaust all feasible modes of the utility model, nor are they used to limit the protection scope of the utility model.

As shown in FIGS. 3-5 , the utility model provides a shower room, which includes a pulley assembly 1 , a guide rail 2 and a sliding door 3 . The pulley assembly 1 is fixedly mounted on the sliding door 3 and can slide along the guide rail 2 .

As shown in Figures 4-17, the pulley assembly 1 includes a shaft sleeve 11, a pulley 12, an eccentric shaft 13, an outer shaft 14, a first gasket 15, a second gasket 16, a nut 17, a nut sleeve 18 and a screw cap 19 .

As shown in FIGS. 4 , 5 and 8-10 , the eccentric shaft 13 includes a base portion 131 , a shaft portion 132 and an eccentric portion 133 . The base portion 131 is disc-shaped, the shaft portion 132 and the eccentric portion 133 are columnar, and the shaft portion 132 and the eccentric portion 133 extend from two end surfaces of the base portion 131 in opposite directions. The shaft part 132 and the base part 131 may be coaxial. The free end of the shaft part 132 defines a hole 134 extending axially along the shaft part 132. The cross section of the hole 134 is non-circular, such as hexagonal. The free end of eccentric part 133 is provided with threaded hole 135, is rotatably installed pulley 12 at the free end of eccentric part 133 by bolt screwing into threaded hole 135, the axis of eccentric part 133 (especially the axis of threaded hole 135) and base 131 The axes are parallel and staggered.

As shown in Fig. 4, Fig. 5, Fig. 8, Fig. 9 and Fig. 11, the outer shaft 14 is provided with a first mounting hole 141 extending along its axial direction, the first mounting hole 141 runs through the outer shaft 14, and the first mounting hole 141 and outer shaft 14 may be coaxial. The shaft portion 132 of the eccentric shaft 13 can be inserted into the first installation hole 141 from one axial end of the first installation hole 141 , and can protrude from the other axial end of the first installation hole 141 . One axial end of the outer shaft 14 is provided with a limiting portion 142 protruding radially of the outer shaft 14 , and the limiting portion 142 forms a ring around the outer shaft 14 in the circumferential direction.

As shown in FIG. 11 , the limiting portion 142 is provided with a first matching portion 145. Specifically, the first matching portion 145 may be formed by cutting off a part of the outer periphery of the limiting portion 142. In particular, the first matching portion 145 is a planar portion formed by cutting two opposing portions of the stopper portion 142 . The first mating portion 145 is used to cooperate with the shaft sleeve 11 so that the outer shaft 14 is put into the shaft sleeve 11 and cannot rotate relatively.

The outer peripheral surface of the other axial end of the outer shaft 14 (the other end where the limiting portion 142 is located) is provided with a thread 144 , and the thread 144 cooperates with the nut 17 to enable the pulley assembly 1 to be mounted on the sliding door 3 . The outer peripheral surface of the outer shaft 14 is also formed with a second fitting portion 143. Specifically, the second fitting portion 143 may be a flat portion formed by cutting off a part of the outer peripheral portion of the outer shaft 14. In particular, the second fitting portion 143 is The planar portion formed by cutting away two opposing portions of the outer shaft 14 including the thread 144 . The second mating portion 143 cooperates with the second washer 16 to prevent relative rotation between the outer shaft 14 and the second washer 16 .

As shown in Figure 4-Figure 9 and Figure 12, the shaft sleeve 11 has a second mounting hole 111, the second mounting hole 111 is a stepped through hole, and the eccentric shaft 13 and the outer shaft 14 are inserted from the large hole side of the stepped hole into the In the second installation hole 111 , and the limiting portion 142 of the outer shaft 14 abuts against the stepped portion of the second installation hole 111 . The second mounting hole 111 is provided with a third matching portion 112, the third matching portion 112 protrudes from the inner peripheral surface of the second mounting hole 111, the third matching portion 112 cooperates with the first matching portion 145, so that the outer shaft 14 It cannot be relatively rotated in the second mounting hole 111 .

The cover plate 113 is provided with a through hole, and the eccentric portion 133 of the eccentric shaft 13 passes through the through hole of the cover plate 113 to connect the cover plate 113 with the shaft sleeve 11, and the cover plate 113 is located on the side of the large hole of the stepped second mounting hole 111 , the cover plate 113 accommodates the base 131 of the eccentric shaft 13 in the second mounting hole 111 . The size of the through hole of the cover plate 113 is larger than the radial size of the eccentric portion 133 , so that the eccentric portion 133 can perform circular motion in the through hole as the eccentric shaft 13 rotates.

It can be understood that in the assembled pulley assembly 1 , the bushing 11 and the outer shaft 14 are relatively stationary, so the bushing 11 and the outer shaft 14 can be installed together through the above structure, or can be integrally formed.

The top of the shaft sleeve 11 is provided with a convex portion 114, which protrudes from the shaft sleeve 11 to the side where the sliding door 3 is located, and the convex portion 114 is roughly parallel to the top of the sliding door 3, so that the shaft sleeve 11 is mounted on the sliding door 3 The shaft sleeve 11 will not rotate relative to the sliding door 3 due to external force.

A first gasket 15 is arranged between the bushing 11 and the sliding door 3. The sliding door 3 is usually made of glass. The first gasket 15 can be made of plastic such as POM to prevent the sliding door 3 from being pressed by the bushing 11. And burst. It can be understood that the first gasket 15 is also disposed between the convex portion 114 of the shaft sleeve 11 and the sliding door 3 .

As shown in Figures 13 and 14, the nut 17 is embedded and installed in the nut sleeve 18, and the nut sleeve 18 is provided with a fixed part 181 at least partially consistent with the outer peripheral contour (regular hexagon) of the nut 17, specifically, the nut sleeve 18 The fixing portion 181 is formed at least on the opposite portion in the circumferential direction of the nut 17 . The ring part 184 connects two opposite parts of the fixing part 181 in the circumferential direction of the nut 17 , and the ring part 184 is located between the second washer 16 and the nut 17 . The fixing part 181 is provided with a fourth matching part 182 , and the fourth matching part 182 protrudes from the inner surface of the fixing part 181 to the side where the nut 17 is located, so that the nut 17 and the nut sleeve 18 are installed with an interference fit.

The outer peripheral portion of the nut sleeve 18 is formed with a first engagement portion 183 protruding radially outward of the nut sleeve 18 , and the first engagement portion 183 can be used to cooperate with the screw cap 19 to prevent the screw cap 19 from falling off.

As shown in FIGS. 3-5 and 17 , the pulley assembly 1 is fixedly installed on the sliding door 3 , the shaft portion 132 passes through the sliding door 3 , and the bushing 11 is located on one side of the sliding door 3 . On the other side of the sliding door 3, the nut 17 on which the nut sleeve 18 is installed is screwed into the thread 144 of the outer shaft, so that the axle sleeve and the pulley 12 are installed on the sliding door 3.

As shown in Figure 4, Figure 5 and Figure 15, the center of the second gasket 16 is provided with a third mounting hole 161, the second gasket 16 is sleeved on the shaft part 132 of the eccentric shaft 13, and is located between the nut sleeve 18 and the sliding door. between 3. The shape of the third mounting hole 161 is substantially the same as the cross-sectional shape of the second mating portion 143, so that the second washer 16 can be installed on the second mating portion 143 of the outer shaft 14, and between the outer shaft 14 and the second washer 16 It cannot be rotated relative to each other. Protrusions 162 are provided on the outer peripheral portion of the second washer 16 along the circumferential direction of the second washer 16 . For example, the protrusions 162 may be in the shape of teeth, so that the second washer 16 forms a shape similar to a spur gear. As shown in FIG. 4 , FIG. 5 and FIG. 16 , the screw cap 19 includes a bottom 191 and a wall portion 192 formed along the circumference of the bottom 191 , and the screw cap 19 is sleeved on the nut sleeve 18 .

The screw cap 19 is provided with a fifth matching portion 196 protruding from the bottom 191 , and the cross-sectional shape of the fifth matching portion 196 is substantially the same as that of the hole 134 , so that the fifth matching portion 196 can be inserted into the hole 134 . Both the cross-sectional shape of the fifth matching portion 196 and the cross-sectional shape of the hole 134 are non-circular. For example, the cross-sectional shape of the fifth matching portion 196 and the cross-sectional shape of the hole 134 can both be hexagonal, and the fifth matching portion 196 is inserted into the hole 134 to prevent relative rotation between the fifth matching portion 196 and the hole 134, thereby Make the eccentric shaft 13 and the screw cap 19 rotate together. The pulley assembly 1 is switched between the working state and the adjusting state through the movement of the rotating cover 19 and the rotating shaft portion 133 along the axial direction of the rotating shaft portion 133 .

The radial inner side of the wall portion 192 is provided with, for example, tooth-shaped grooves 193 , and the grooves 193 may be arranged at intervals along the circumferential direction of the screw cap 19 . For example, five grooves 193 form one group, and five groups are arranged at intervals from each other. In the working state, the screw cover 19 is close to the second gasket 16 along the axial direction of the screw cover 19, so that the groove 193 of the screw cover 19 is engaged with the protrusion 162 of the second gasket 16, so that the rotation of the screw cover 19 can be prevented, and then The rotation of the eccentric shaft 13 is prevented so that the position of the pulley 12 changes. In the adjusted state, the groove 193 of the screw cover 19 and the protrusion 162 of the second gasket 16 are disengaged by the screw cover 19 away from the second gasket 16 along the axial direction of the screw cover 19, and the rotation of the screw cover 19 can The position of the pulley 12 is adjusted by rotating the eccentric shaft 13 .

It can be understood that, in the above embodiments, the second gasket 16 is a separate component, but the present invention is not limited thereto. The second gasket can be integrated with the nut sleeve, or the second gasket can be integrated with the nut, or the second gasket can also be integrated with the sliding door. Even, the second washer may not be provided, and the edge of the nut is used as the protrusion of the second washer. In a word, the forms of the second gasket and the protrusion are not limited to the forms listed in the embodiment, it is only necessary to ensure that the protrusion and the groove cooperate to prevent the rotation of the screw cap in the working state, and the protrusion and the groove are disengaged in the adjustment state That's it.

The radial inner side of the wall portion 192 is also provided with a second engaging portion 195. When switching from the working state to the adjusting state, the second engaging portion 195 can cooperate with the first engaging portion 183 of the nut sleeve 18 to prevent the cap from turning. 19 comes off when away from the second spacer 16.

In the working state, the distance between the first engaging portion 183 and the second engaging portion 195 is greater than the thickness of the second gasket 16 , at least when the first engaging portion 183 and the second engaging portion 195 are engaged, The groove 193 of the screw cap 19 and the protrusion 162 of the second gasket 16 are separated from each other.

An anti-slip portion 194 is disposed on the radially outer side of the wall portion 192 , for example, the anti-slip portion 194 may be a strip-shaped protrusion disposed along the circumferential direction of the screw cap 19 . It can be understood that the purpose of providing the anti-slip portion 194 is to increase friction and prevent slippage when the screw cap 19 is rotated, and the anti-slip portion 194 can also be formed by a formal pattern or an anti-slip material.

The following describes the way to adjust the pulley assembly of the shower room.

As shown in FIG. 4 , when the sliding door 3 of the shower room is at the lowest position, the eccentric portion 133 is at the highest position of the sliding door 3 . At this time, if the sliding door 3 is adjusted upwards, the screw cover 19 needs to be operated to move away from the sliding door 3, so that the groove 193 of the screw cover 19 is separated from the tooth-shaped protrusion 162 of the second gasket 16, so that the screw cover 19 able to turn. In order to prevent the screw cap 19 from falling off due to excessive force when pulling out the screw cap 19 , after the screw cap 19 is pulled out for a certain distance, the first engaging portion 183 can be engaged with the second engaging portion 195 . During the pull-out process of the screw cap, the fifth matching part 196 is kept in the hole 134, and both the fifth matching part 196 and the hole 134 are hexagonal. Turning the screw cap 19 makes the eccentric shaft 13 rotate together, and the rotation of the eccentric shaft 13 makes the eccentric part 133 move down. It can be understood that since the sliding door 3 is at the lowest position, turning in any direction can make the eccentric portion 133 move downward, that is, the sliding door 3 moves upward. During the adjustment process, the movement of the sliding door 3 can be observed. When the movable door is adjusted to a suitable position, the screw cover 19 is moved toward the sliding door 3, and the groove 193 is engaged with the toothed protrusion of the second gasket 16, which can prevent the screw from rotating. The cover 19 is rotated to complete the adjustment.

It can be understood that the height adjustment range of the pulley 12 is the height adjustment range of the sliding door 3 , and the adjustment range is twice the offset distance between the axis of the eccentric portion 133 and the axis of the base portion 131 .

Claims (10)

1. A pulley assembly, characterized in that it comprises: a pulley for mounting to a rail, the pulley being capable of moving the pulley assembly along the rail; A shaft sleeve, the shaft sleeve has a mounting hole; fastener; an outer shaft, the outer shaft is installed in the installation hole, and the outer shaft and the installation hole are fitted so that the outer shaft cannot rotate in the installation hole, the outer shaft passes through the sliding door and Cooperating with the fastener can make the pulley assembly mounted on the sliding door, at least a part of the sleeve and the pulley are located on one side of the sliding door, and the fastener is located on the sliding door the other side of the An eccentric shaft, the eccentric shaft includes a base, a shaft portion and an eccentric portion, the shaft portion and the eccentric portion are located on both sides of the base, the base is accommodated in the mounting hole, the axis of the eccentric portion The axis of the base part is staggered, the pulley is rotatably connected to the eccentric part, the rotating shaft part is inserted into the outer shaft, The pulley assembly has an adjusting state and an operating state, in which the rotating shaft part can rotate in the outer shaft, and in the operating state, the eccentric shaft is fixed and cannot rotate. 2. The pulley assembly according to claim 1, characterized in that, the pulley assembly further comprises a screw cover, the screw cover is mounted on the shaft part, and can make the shaft part rotate in the outer shaft, Therefore, the eccentric shaft can rotate together with the screw cap. 3. The pulley assembly according to claim 2, wherein the pulley assembly further comprises a first spacer, and the first spacer is located between the bushing and the sliding door. 4. The pulley assembly according to claim 2, characterized in that, the pulley assembly has a protrusion, and the screw cap has a groove, and in the working state, the protrusion and the groove are matched to be able to The groove is blocked by the protrusion so that the screw cap cannot be rotated, and the protrusion and the groove are disengaged in the adjustment state, so that the screw cap can be rotated. 5. The pulley assembly according to claim 4, characterized in that, the pulley assembly further comprises a second washer, the protrusion is arranged on the second washer, and the second washer is located on the tight Between the firmware and the sliding door, the second spacer is sleeved on the outer shaft, and the second spacer and the outer shaft are installed so that they cannot rotate relative to each other, and the protrusion is along the The circumferential direction of the second gasket is arranged on the outer peripheral portion of the second gasket; The screw cap includes a bottom and a wall formed along the circumference of the bottom, the wall is provided with a groove that fits with the protrusion of the second gasket, through the groove and the The protrusions are engaged so that the screw cap cannot rotate relative to the second gasket. 6. The pulley assembly according to claim 5, characterized in that, the bottom of the screw cap is provided with a fitting portion, the shaft portion is provided with a hole, the fitting portion can be inserted into the hole, and passes through the the rotating cover and the rotating shaft part move along the axial direction of the rotating shaft part, so that the pulley assembly switches between the working state and the adjusting state, In the working state, the groove of the screw cap is engaged with the protrusion of the second gasket, In the adjusted state, the groove of the screw cap is disengaged from the protrusion of the second washer. 7 . The pulley assembly according to claim 6 , wherein both the cross-sectional shape of the fitting portion and the cross-sectional shape of the hole are non-circular. 8. The pulley assembly according to claim 6, wherein the fastener comprises a nut and a nut sleeve, the nut and the nut sleeve are arranged coaxially, and the nut is embedded and installed in the nut sleeve , the outer peripheral portion of the nut sleeve is formed with a first engaging portion protruding radially outward of the nut sleeve; , the second engaging portion can cooperate with the first engaging portion. 9. The pulley assembly according to claim 8, characterized in that, in the working state, the distance between the first engaging portion and the second engaging portion is greater than that of the second washer The thickness is such that when the first locking part and the second locking part are engaged, the groove of the screw cap and the protrusion of the second gasket are separated from each other. 10. A shower room, characterized in that the shower room comprises a sliding door, a guide rail and the pulley assembly according to any one of claims 1-9.