CN111268544A - Hand elevator - Google Patents

Abstract

The application provides a hand elevator belongs to elevator technical field, and it includes step subassembly, power pack, step drive mechanism, elevator handrail frame, elevator handrail area, pressure head, pushing down mechanism, gear drive mechanism and synchronous drive mechanism down. The elevator handrail frame is provided with a T-shaped guide rail. The outside of T shape guide rail is located to elevator handrail cover, is equipped with the T-slot on the elevator handrail area, is equipped with first profile of tooth portion on the groove lateral wall in T-slot. The lower pressing head is connected to the lower pressing mechanism, and the lower pressing mechanism is used for driving the lower pressing head to be pressed downwards into the T-shaped groove so as to tighten the handrail belt of the elevator. The gear transmission mechanism is arranged on the lower pressure head and comprises a power input gear and a first power output gear, and the first power output gear is used for being meshed with the first tooth-shaped part when the lower pressure head tightens the elevator handrail. The power input gear is connected with the power unit through a synchronous transmission mechanism. The phenomenon of skidding can not appear in elevator handrail area and the pressure head that pushes down, the effectual hysteresis who avoids the elevator handrail.

Description

an escalator

technical field

The present application relates to the technical field of elevators, and in particular, to an escalator.

Background technique

In order to ensure the safety of passengers, the movement speed of the elevator handrail of the escalator needs to be faster than or equal to the movement speed of the steps. At present, the movement of the elevator handrail is generally driven by the power unit to rotate the pulley, and the rotation of the pulley drives the elevator handrail to move, but the elevator handrail will gradually wear out with the use of time, and there will be slippage between the elevator handrail and the pulley. , so that the speed of the elevator handrail gradually slows down, and the running speed of the elevator handrail is slower than the movement speed of the steps.

SUMMARY OF THE INVENTION

The embodiment of the present application provides an escalator, so as to improve the problem that the elevator handrail of the existing escalator is prone to lag as the use time increases.

The embodiment of the present application provides an escalator, including a step assembly, a power unit, a step transmission mechanism, an elevator handrail frame, an elevator handrail belt, a pressing head, a pressing mechanism, a gear transmission mechanism and a synchronous transmission mechanism;

The power unit and the step assembly are drive-connected through the step transmission mechanism;

The elevator handrail has a T-shaped guide rail;

The elevator handrail is sleeved on the outer side of the T-shaped guide rail, the elevator handrail is provided with a T-shaped groove for the T-shaped guide rail to be inserted into, and the side wall of the groove of the T-shaped groove is provided with a first tooth. shape;

The pressing head is connected to the pressing mechanism, and the pressing mechanism is used to drive the pressing head to press down into the T-shaped groove, so as to tighten the handrail of the elevator;

The gear transmission mechanism is arranged on the lower head, and the gear transmission mechanism includes a power input gear and a first power output gear, and the first power output gear is used for driving the elevator handrail on the lower head. engaging with the first tooth-shaped portion when tightened;

The power input gear and the power unit are drive-connected through the synchronous transmission mechanism.

In the above technical solution, the elevator handrail belt can be tightened by driving the pressing head to press down by the pressing mechanism, so as to ensure that the elevator handrail will not fall off during the movement around the T-shaped guide rail. When the pressing head enters the T-shaped groove of the elevator handrail, and the elevator handrail is tightened, the first power output gear of the pressing head will mesh with the first tooth-shaped part, and the power of the power unit will pass through the synchronous transmission mechanism and The gear transmission mechanism is transmitted to the elevator handrail, thereby driving the elevator handrail to move. Because the force transmission between the elevator handrail belt and the pressing head is realized through the meshing of the first toothed part and the first power output gear, the elevator handrail belt and the pressing head will not slip, which effectively avoids the hysteresis of the elevator handrail. , this structure can ensure that the movement speed of the elevator handrail is always equal to or greater than the movement speed of the steps.

Further, the lower pressing head includes a base body, a first lateral displacement block and a lower pressing block;

the base body is connected with the pressing mechanism, and the power input gear is rotatably arranged on the base body;

Both the first side shifting block and the lower pressing block are movably arranged on the base body, and the first power output gear is rotatably arranged on the first side shifting block;

When the push-down mechanism drives the push-down head to push down, the push-down block can move upward relative to the base after contacting the bottom wall of the T-shaped groove to drive the first side-moving block The first power output gear is driven to move laterally inside the T-shaped groove, so that the first power output gear is engaged with the first toothed portion.

In the above technical solution, in the process that the lower pressing mechanism drives the lower pressing head to press down, after the lower pressing block contacts the bottom wall of the T-shaped groove, the lower pressing block will move upward relative to the base body, and the lower pressing block will drive the first side shifting block. moving, thereby driving the first power output gear to move laterally inside the T-shaped groove, so as to realize the meshing between the first power output gear and the first toothed portion. This structure allows the first power output gear to not interfere with the elevator handrail when the pressing head enters the T-shaped groove of the elevator handrail, so that the first power output gear can more easily interact with the first power output gear inside the elevator handrail. A toothed portion engages.

Further, the pressing head further includes a first elastic reset member and a second elastic reset member;

the first elastic reset piece is arranged between the lower pressing block and the base body;

The second elastic restoring member is arranged between the first side shifting block and the base body.

In the above technical solution, a first elastic reset member is arranged between the lower pressing block and the base body, and the first elastic reset member can make the lower pressing block automatically protrude downward during the process of lifting the lower pressing head. A second elastic reset piece is arranged between the first measuring piece and the base body, and the second elastic reset piece can make the first side shift block automatically reset during the process of downwardly extending the lower pressing block.

Further, the lower pressing block has a first guiding slope for pushing the first side shifting block to move laterally;

The first side shift block has a second guide slope for contacting with the first guide slope.

In the above technical solution, the arrangement of the first guiding slope on the lower pressing block and the second guiding slope on the first side shifting block facilitates the transmission of force between the lower pressing block and the first side shifting block, so that the first side shifting Less force is required to lower the block to move the block sideways.

Further, the first side shifting block has a pressing surface for abutting with the bottom wall of the T-shaped groove;

When the pressing surface abuts against the bottom wall of the T-shaped groove, the first power output gear engages with the first toothed portion.

In the above technical solution, during the pressing process of the pressing head, when the pressing surface of the first side shift block is in contact with the bottom wall of the T-shaped groove, the first power output gear meshes with the first toothed portion, and at this time, the T-shaped The bottom wall of the groove cannot continue to push the lower pressing block to move upward, and the first side shifting block no longer moves sideways.

Further, the gear transmission mechanism further comprises a second power output gear, and the side wall of the T-shaped groove is provided with a second toothed portion opposite to the first toothed portion;

The lower pressing head further includes a second side shifting block, the second side shifting block is movably arranged on the base body, and the lower pressing block is located between the first side shifting block and the second side shifting block ;

When the push-down mechanism drives the push-down head to push down, the push-down block can move upward relative to the base after contacting the bottom wall of the T-shaped groove to drive the first side-moving block and the second side shifting block respectively drive the first power output gear and the second power output gear to move to opposite sides in the T-shaped groove, so that the first power output gear and the second power output gear respectively engage with the first toothed portion and the second toothed portion.

In the above technical solution, the side wall of the T-shaped slot is provided with a second toothed portion opposite to the first toothed portion, and the first power output gear and the second power output gear are respectively the first toothed portion and the second toothed portion. After the toothed parts are engaged, the power of the first power output gear can be transmitted to both sides of the elevator handrail through the first power output gear and the second power output gear, so that the elevator handrail moves more smoothly.

Further, the gear transmission mechanism further includes a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a sixth gear and a seventh gear;

The first gear and the second gear are rotatably connected with the first side shift block through the same first rotating shaft, and the first gear is meshed with the first power output gear;

The third gear is rotatably arranged on the base body, the third gear meshes with the power input gear, and the second gear is used for connecting the first power output gear with the first toothed portion meshing with the third gear during meshing;

The fourth gear and the fifth gear are rotatably connected with the second side shifting block through the same second rotating shaft, and the fourth gear is meshed with the second power output gear;

Both the sixth gear and the seventh gear are rotatably arranged on the base body, the sixth gear is meshed with the power input gear, the seventh gear is meshed with the sixth gear, and the fifth gear is used for The seventh gear is engaged with the second power output gear when the second power output gear is engaged with the second toothed portion.

In the above technical solution, the power of the power input gear can be sequentially transmitted to the first toothed portion of the elevator handrail through the third gear, the second gear, the first gear and the first power output gear; the power of the power input gear can also be sequentially transmitted. It is transmitted to the second toothed portion of the elevator handrail through the seventh gear, the sixth gear, the fifth gear, the fourth gear and the second power output gear. That is, the rotation of the power input gear can cause traction on both sides of the elevator handrail, so that the elevator handrail moves.

Further, the pressing mechanism includes a frame, a first link, a second link and a driving member;

The frame, the first connecting rod, the lower pressing head and the second connecting rod are hinged in sequence to form a parallelogram mechanism;

The driving member is used for driving the first link to rotate relative to the frame.

In the above technical solution, the frame, the first connecting rod, the lowering head and the second connecting rod are hinged in sequence to form a parallelogram mechanism, and the first connecting rod can be driven to rotate relative to the frame by the driving member, so that the lowering head can be pressed down or lifted. The structure is simple. During the pressing process of the lower pressing head, the lower pressing head moves in a plane, and it is always parallel to the frame.

Further, the driving member is a driving handle fixedly connected with the first connecting rod;

The pressing mechanism further includes a locking device for locking the driving handle and the frame.

In the above technical solution, the driving member is a driving handle fixedly connected with the first connecting rod, and the operator can shake the driving handle to rotate the first connecting rod relative to the bracket, thereby pressing down or lifting the pressing head. After the pressing head enters the T-shaped groove of the elevator handrail and tightens the elevator handrail, the driving handle and the frame are locked by the locking device to keep the elevator handrail in a tight state, and the operation is simple and convenient.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of an escalator provided in an embodiment of the present application;

Fig. 2 is the A-A view shown in Fig. 1;

FIG. 3 is a schematic structural diagram of a downward pressure head tightening an elevator handrail provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of the separation of the pressing head and the elevator handrail provided by the embodiment of the present application;

5 is a schematic diagram of the transmission of the synchronous transmission mechanism, the gear transmission mechanism and the elevator handrail provided in the embodiment of the present application;

FIG. 6 is a schematic diagram of the connection between the pressing mechanism and the pressing head according to the embodiment of the present application.

Icon: escalator 200; step assembly 10; step 11; power unit 20; step transmission mechanism 30; first small sprocket 31; second small sprocket 32; first large sprocket 33; second large sprocket 34 The first synchronous wheel 35; the second synchronous wheel 36; the first chain 37; the second chain 38; the first synchronous belt 39; A toothed part 511; a second toothed part 512; a lower pressing head 60; a base body 61; a protruding part 611; a first end face 612; a second end face 613; Pressing surface 622; lower pressing block 63; first guiding slope 631; third guiding slope 632; second side shifting block 64; fourth guiding slope 641; first guide rod 65; second guide rod 66; 67; the second elastic reset part 68; the third elastic reset part 69; the third guide rod 71; the limit part 711; the pressing mechanism 80; 84; locking device 85; gear transmission mechanism 90; power input gear 91; first power output gear 92; second power output gear 93; first gear 94; second gear 95; third gear 96; fourth gear 97; fifth gear 98; sixth gear 99; seventh gear 101; first shaft 102; second shaft 103; synchronous transmission mechanism 110; third synchronizing wheel 111; fourth synchronizing wheel 112; The second bevel gear 114; the second timing belt 115.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the application is usually placed in use, or the Orientation or positional relationship that is commonly understood by those skilled in the art, or the orientation or positional relationship that the product of the application is commonly placed in use, is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must be It has a specific orientation, is constructed and operates in a specific orientation, and therefore should not be construed as a limitation of the present application. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Example

1 and 2 , the embodiment of the present application provides an escalator 200 , which includes a step assembly 10 , a power unit 20 , a step transmission mechanism 30 , an elevator handrail frame 40 , an elevator handrail belt 50 , a pressing head 60 , and a pressing mechanism 80 (neither shown in FIGS. 1 and 2 ), gear transmission mechanism 90 (neither shown in FIGS. 1 and 2 ) and synchronous transmission mechanism 110 .

The power unit 20 and the step assembly 10 are drive-connected through the step transmission mechanism 30 . The elevator handrail frame 40 has a T-shaped guide rail 41 . The elevator handrail 50 is sleeved on the outer side of the T-shaped guide rail 41, the elevator handrail 50 is provided with a T-shaped groove 51 for the T-shaped guide rail 41 to be clamped into, and the side wall of the groove of the T-shaped groove 51 is provided with a first tooth-shaped portion 511. The pressing head 60 is connected to the pressing mechanism 80 , and the pressing mechanism 80 is used to drive the pressing head 60 to press down into the T-shaped groove 51 to tighten the handrail 50 of the elevator. The gear transmission mechanism 90 is arranged on the lower pressing head 60, and the gear transmission mechanism 90 includes a power input gear 91 and a first power output gear 92. The first power output gear 92 is used for connecting with the first power output gear 92 when the lower pressing head 60 tightens the elevator handrail 50. A toothed portion 511 engages. The power input gear 91 is drivingly connected with the power unit 20 through a synchronous transmission mechanism 110 .

The elevator handrail belt 50 can be tightened by driving down the pressing head 60 by the pressing mechanism 80 to ensure that the elevator handrail does not fall off during the movement around the T-shaped guide rail 41 . When the pressing head 60 enters the T-shaped groove 51 of the elevator handrail 50 and tightens the elevator handrail 50, the first power output gear 92 of the pressing head 60 will mesh with the first toothed portion 511, and the power unit 20 The power of the elevator is sequentially transmitted to the elevator handrail 50 through the synchronous transmission mechanism 110 and the gear transmission mechanism 90, thereby driving the elevator handrail 50 to move. Because the force is transmitted between the elevator handrail 50 and the pressing head 60 through the meshing of the first toothed portion 511 and the first power output gear 92, the elevator handrail 50 and the pressing head 60 will not slip, effectively avoiding the slipping phenomenon. To avoid the hysteresis of the elevator handrail, this structure can ensure that the moving speed of the elevator handrail 50 is always equal to or greater than the moving speed of the steps 11 .

Illustratively, the power unit 20 is an electric motor.

As shown in FIG. 1 , both the motor and the step transmission mechanism 30 are mounted on a frame 81 (not shown in FIG. 1 ). 1, the step transmission mechanism 30 includes a first small sprocket 31, a second small sprocket 32, a first large sprocket 33, a second large sprocket 34, a first synchronous wheel 35, a second synchronous wheel 36, The first chain 37 , the second chain 38 and the first timing belt 39 . The first synchronizing wheel 35 is arranged on the output shaft of the motor. The first small sprocket 31 , the second small sprocket 32 , the first large sprocket 33 , the second large sprocket 34 and the second synchronizing wheel 36 are all connected to the frame 81 . Rotationally connected, the first small sprocket 31, the second synchronizing wheel 36 and the first large sprocket 33 are coaxially arranged, the second small sprocket 32 and the second large sprocket 34 are coaxially arranged, the first synchronizing wheel 35 and the first The two synchronizing wheels 36 are connected by the first synchronous belt 39, the first small chain wheel 31 and the second small chain wheel 32 are connected by the first chain 37, and the first large chain wheel 33 and the second large chain wheel 34 are connected by the second chain wheel 37. Chain 38 drive connection. The step assembly 10 includes a plurality of steps 11 to which the first chain 37 and the second chain 38 are connected. When the motor rotates, the first synchronous belt 39 will drive the second synchronous wheel 36 and the first small sprocket 31 to rotate together, thereby making the first chain 37 move, thereby driving each step 11 to move, of course, the second chain 38 will also It moves together with the first chain 37 .

Further, as shown in FIGS. 3 and 4 , the lower pressing head 60 includes a base body 61 , a first lateral displacement block 62 and a lower pressing block 63 . The base body 61 is connected to the pressing mechanism 80 , and the power input gear 91 is rotatably provided on the base body 61 . The first side shifting block 62 and the lower pressing block 63 are both movably arranged on the base body 61 , and the first power output gear 92 is rotatably arranged on the first side shifting block 62 . When the lower pressing mechanism 80 drives the lower pressing head 60 to press down, the lower pressing block 63 can contact the bottom wall of the T-shaped groove 51 and move upward relative to the base body 61 to drive the first side shifting block 62 to drive the first power output gear 92 The inside of the T-slot 51 is moved laterally to engage the first power output gear 92 with the first toothed portion 511 .

When the pressing mechanism 80 drives the pressing head 60 to press down, after the pressing block 63 contacts the bottom wall of the T-shaped groove 51, the pressing block 63 will move upward relative to the base 61, and the pressing block 63 drives the first side. The moving block 62 moves, thereby driving the first power output gear 92 to move laterally inside the T-shaped groove 51 , thereby realizing the meshing of the first power output gear 92 with the first toothed portion 511 . This structure allows the first power output gear 92 to not interfere with the elevator handrail 50 during the process of entering the T-slot 51 of the elevator handrail 50, so that the first power output gear 92 can more easily interact with the elevator handrail 50. The first toothed portion 511 inside the elevator handrail 50 engages.

Further, the gear transmission mechanism 90 further includes a second power output gear 93, and a second toothed portion 512 opposite to the first toothed portion 511 is provided on the side wall of the T-shaped slot 51;

The lower pressing head 60 further includes a second side shifting block 64, the second side shifting block 64 is movably arranged on the base body 61, and the lower pressing block 63 is located between the first side shifting block 62 and the second side shifting block 64;

When the lower pressing mechanism 80 drives the lower pressing head 60 to press down, the lower pressing block 63 can contact the bottom wall of the T-shaped groove 51 and move upward relative to the base 61 to drive the first side shifting block 62 and the second side shifting block 64 The first power output gear 92 and the second power output gear 93 are respectively driven to move in opposite lateral directions in the T-shaped slot 51, so that the first power output gear 92 and the second power output gear 93 are respectively connected to the first toothed portion 511. The meshing meshes with the second toothed portion 512 .

The side wall of the T-shaped slot 51 is provided with a second toothed portion 512 opposite to the first toothed portion 511. The first power output gear 92 and the second power output gear 93 are respectively the first toothed portion 511 and the first toothed portion 511. After the two toothed parts 512 are engaged, the power of the first power output gear 92 can be transmitted to both sides of the elevator handrail 50 through the first power output gear 92 and the second power output gear 93, so that the elevator handrail 50 moves more smoothly.

The cross section of the base body 61 is a T-shaped structure, the base body 61 has a protruding part 611 for inserting into the T-shaped groove 51 of the elevator handrail 50, and the protruding part 611 has a first end surface 612 and a second end surface 613 arranged in parallel. The distance between one end surface 612 and the second end surface 613 is slightly smaller than the width of the opening of the T-shaped groove 51 , that is, the protruding portion 611 can be inserted into the T-shaped groove 51 smoothly.

The first side shifting block 62 is movably disposed on the protruding portion 611 , and the protruding portion 611 is provided with a first guide rod 65 for the first side shifting block 62 to move laterally. The moving direction of the first side shifting block 62 is perpendicular to the first end surface 612 . The second side shifting block 64 is movably disposed on the protruding portion 611 , and the protruding portion 611 is provided with a second guide rod 66 for the second side shifting block 64 to move laterally. The moving direction of the second side shifting block 64 is perpendicular to the second end surface 613 .

The first side shift block 62 and the second side shift block 64 are both L-shaped structures, the first power output gear 92 is rotatably connected to the first side shift block 62 through a rotating shaft, and the second power output gear 93 is connected to the first side shift block 62 through another rotating shaft. The second side shift block 64 is connected.

In addition, the lower pressing block 63 further includes a first elastic restoring member 67 , a second elastic restoring member 68 and a third elastic restoring member 69 . The first elastic reset piece 67 is arranged between the lower pressing block 63 and the base body 61. The first elastic reset piece 67 can make the lower pressing block 63 automatically extend downward during the process of lifting the lower pressing head 60; the second elastic reset piece The second elastic reset piece 68 can make the first side shift block 62 reset automatically when the lower pressing block 63 is extended downwards; the third elastic reset piece 69 is arranged between the second moving block and the base body 61 , and the third elastic reset piece 69 can make the second side moving block 64 reset automatically when the lower pressing block 63 is protruding downward.

The lower pressing block 63 is connected with a third guide rod 71 , the base body 61 is provided with a hole for the third guide rod 71 to move, and a section of the third guide rod 71 away from the lower pressing block 63 is provided with a limiting portion 711 , and the limiting portion 711 is located in the lower pressing block 63 . Above the upper surface of the base body 61 , the lower pressing block 63 is located below the lower surface of the base body 61 . The third guide rod 71 is located between the first side shifting block 62 and the second side shifting block 64 .

Exemplarily, the first elastic reset member 67, the second elastic reset member 68 and the third elastic reset member 69 are all springs, the first elastic reset member 67 is sleeved on the outer side of the third guide rod 71, and the second elastic reset member 68 is sleeved on the outer side of the first guide rod 65 , and the third elastic restoring member 69 is sleeved on the outer side of the second guide rod 66 . As shown in FIG. 4 , under natural conditions, under the action of the second elastic restoring member 68, the limiting portion 711 on the third guide rod 71 abuts against the upper surface of the base body 61. The block 63 and the third guide rod 71 can move upward, but cannot move downward. Under natural conditions, both the first side shift block 62 and the second side shift block 64 are in a retracted state, the first power output gear 92 does not exceed the first end surface 612 of the protruding portion 611, and the second power output gear 93 does not exceed The second end surface 613 of the protruding portion 611 , in this case, the first power output gear 92 and the second power output gear 93 will not hinder the protruding portion 611 from entering the T-slot 51 of the elevator handrail 50 .

Further, the lower pressing block 63 has a first guiding inclined surface 631 for pushing the first lateral shifting block 62 to move laterally; The lower pressing block 63 has a third guiding inclined surface 632 for pushing the second lateral moving block 64 to move laterally; the second lateral moving block 64 has a fourth guiding inclined surface 641 for contacting with the third guiding inclined surface 632 .

In the above technical solution, the setting of the first guiding slope 631 on the lower pressing block 63 and the second guiding slope 621 on the first side shifting block 62 facilitates the transmission of force between the lower pressing block 63 and the first side shifting block 62 . , so that the force exerted by the lower pressing block 63 on the first side shifting block 62 to move laterally is smaller. Similarly, the third guide slope 632 on the lower pressing block 63 and the fourth guiding slope 641 on the second side shifting block 64 are arranged to facilitate the transmission of force between the lower pressing block 63 and the second side shifting block 64, so that the first The force exerted by the lower pressing block 63 on the two side shifting blocks 64 to move laterally is smaller.

In addition, the first side shifting block 62 has a pressing surface 622 for abutting against the bottom wall of the T-shaped groove 51; when the pressing surface 622 abuts against the bottom wall of the T-shaped groove 51, the first power The output gear 92 meshes with the first toothed portion 511 .

During the pressing process of the pressing head 60, when the pressing surface 622 of the first side shifting block 62 is in contact with the bottom wall of the T-shaped groove 51, the first power output gear 92 meshes with the first toothed portion 511. At this time, T The bottom wall of the groove 51 cannot continue to push the lower pressing block 63 to move upward, and the first side shifting block 62 does not move sideways any more. The downward pressure exerted by the pressing mechanism 80 on the base body 61 can be transmitted to the elevator handrail 50 through the first side shifting block 62 , so as to tighten the elevator handrail 50 .

The lower surface of the first side shifting block 62 is the pressing surface 622 . In addition, the lower surface of the second side shifting block 64 is coplanar with the pressing surface 622 of the first side shifting block 62 .

As shown in FIG. 3 , when the pressing mechanism 80 drives the pressing head 60 to gradually press down into the T-shaped groove 51 of the elevator handrail 50 , the lower surface (pressing surface 622 ) of the first side shifting block 62 and the second side The lower surface of the moving block 64 finally abuts against the bottom wall of the T-shaped groove 51. At this time, the first power output gear 92 protrudes beyond the first end surface 612 of the protruding portion 611 and meshes with the first toothed portion 511. The output gear 93 protrudes beyond the second end surface 613 of the protruding portion 611 and engages with the second toothed portion 512 .

Further, as shown in FIG. 5 , the gear transmission mechanism 90 further includes a first gear 94 , a second gear 95 , a third gear 96 , a fourth gear 97 , a fifth gear 98 , a sixth gear 99 and a seventh gear 101 .

The first gear 94 and the second gear 95 are rotatably connected to the first side shift block 62 through the same first rotating shaft 102 , and the first gear 94 is meshed with the first power output gear 92 . The third gear 96 is rotatably provided on the base body 61 , the third gear 96 meshes with the power input gear 91 , and the second gear 95 is used for engaging with the third gear 96 when the first power output gear 92 meshes with the first toothed portion 511 . mesh. The fourth gear 97 and the fifth gear 98 are rotatably connected to the second side shifting block 64 through the same second rotating shaft 103 , and the fourth gear 97 is meshed with the second power output gear 93 . Both the sixth gear 99 and the seventh gear 101 are rotatably arranged on the base body 61, the sixth gear 99 meshes with the power input gear 91, the seventh gear 101 meshes with the sixth gear 99, and the fifth gear 98 is used for the second power output. The gear 93 meshes with the seventh gear 101 when meshing with the second toothed portion 512 .

The power of the power input gear 91 can be sequentially transmitted to the first toothed portion 511 of the elevator handrail 50 through the third gear 96 , the second gear 95 , the first gear 94 and the first power output gear 92 ; the power of the power input gear 91 It can also be transmitted to the second toothed portion 512 of the elevator handrail 50 through the sixth gear 99 , the seventh gear 101 , the fifth gear 98 , the fourth gear 97 and the second power output gear 93 in sequence. That is, the rotation of the power input gear 91 can make both sides of the elevator handrail 50 receive traction, so that the elevator handrail 50 moves.

The radius and modulus of the first power output gear 92 and the second power output gear 93 are both equal; the radius and modulus of the second gear 95 and the fifth gear 98 are both equal; the first gear 94 and the The radii and modules of both the fourth gears 97 are the same; the radii and modules of the third gear 96 , the sixth gear 99 and the seventh gear 101 are all the same.

1 and 4, the synchronous transmission mechanism 110 includes a third synchronous wheel 111, a fourth synchronous wheel 112, a first bevel gear 113, a second bevel gear 114 and a second synchronous belt 115. The third synchronous wheel 111 is connected to the motor. The output shaft is fixed, the fourth synchronizing wheel 112 and the first bevel gear 113 are rotatably connected to the base 61 through the same rotating shaft, the third synchronizing wheel 111 and the fourth synchronizing wheel 112 are connected by the second synchronizing belt 115, and the second bevel gear 114 is connected to the power The input gear 91 is rotatably connected to the base body 61 through the same rotating shaft, and the second bevel gear 114 meshes with the first bevel gear 113 . When the motor is working, the power of the output shaft of the motor will be transmitted to the power input gear 91 of the gear transmission mechanism 90 through the above-mentioned synchronous transmission mechanism 110, so that the first power output gear 92 and the second power output gear 93 rotate in opposite directions, Finally, the elevator handrail 50 is moved.

It should be noted that, in other embodiments, the elevator handrail 50 only has the first toothed portion 511. In this case, the second power output gear 93 and the fourth gear in the above-mentioned gear transmission mechanism 90 can be 97, fifth gear 98, sixth gear 99 and seventh gear 101 are removed.

Further, as shown in FIG. 6 , the pressing mechanism 80 includes a frame 81 , a first link 82 , a second link 83 and a driving member 84 . The frame 81 , the first connecting rod 82 , the lower pressing head 60 and the second connecting rod 83 are hinged in sequence to form a parallelogram mechanism; the driving member 84 is used to drive the first connecting rod 82 to rotate relative to the frame 81 .

By driving the first connecting rod 82 to rotate relative to the frame 81 by the driving member 84, the lower pressing head 60 can be pressed down or lifted up, and the structure is simple. The racks 81 are always kept parallel.

The first link 82 and the second link 83 are both hinged to the base body 61 of the lower pressing head 60 .

Optionally, the driving member 84 is a driving handle fixedly connected with the first connecting rod 82 , and the pressing mechanism 80 further includes a locking device 85 for locking the driving handle and the frame 81 .

The operator can shake the drive handle to rotate the first link 82 relative to the bracket, thereby depressing or raising the pressing head 60 . After the pressing head 60 enters the T-shaped groove 51 of the elevator handrail 50 and tightens the elevator handrail 50, the driving handle and the frame 81 are locked by the locking device 85, so that the elevator handrail 50 can be kept in a tight state. status, the operation is simple and convenient.

Exemplarily, the locking device 85 is a locking screw, and the locking screw is screwed on the driving handle. Tighten the locking screw so that the locking screw presses the frame 81 to lock the drive handle; loosen the locking screw to separate the locking screw from the frame 81, then loosen the drive handle, at this time, the drive handle can be driven by the drive handle The first link 82 rotates.

It should be noted that, in other embodiments, the driving member 84 can also be an electric element. For example, the driving member 84 includes a driving motor and a worm gear reducer, the output shaft of the driving motor is connected with the input shaft of the worm gear reducer, and the worm gear The output shaft of the worm reducer is connected with the first connecting rod 82 and the hinge shaft of the frame 81 , and the hinge shaft is fixed with the first connecting rod 82 and can rotate relative to the frame 81 . The rotation of the driving motor will drive the first connecting rod 82 to rotate. After the driving motor stops, because the worm gear reducer has the characteristics of irreversible power transmission, even if the pressing head 60 is subjected to the tension force of the elevator handrail 50, it cannot drive the first connecting rod 82. A link 82 rotates. That is to say, after the driving motor works to rotate the first link 82 and make the lower pressing head 60 tighten the elevator handrail 50, the driving motor stops, and the lower pressing head 60 will be kept at the position where the elevator handrail 50 is tightened. .

In this embodiment, there are two first connecting rods 82 and two second connecting rods 83 . The two first connecting rods 82 are located on both sides of the base body 61 (shown in FIG. 3 and FIG. 4 ), respectively. The connecting rods 83 are respectively located on both sides of the base body 61 .

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (9)

1. an escalator, is characterized in that, comprises: Step components; power unit; a step transmission mechanism, the power unit and the step assembly are drive-connected through the step transmission mechanism; An elevator handrail frame, the elevator handrail frame has a T-shaped guide rail; Elevator handrails, the elevator handrails are sleeved on the outside of the T-shaped guide rails, the elevator handrails are provided with T-shaped grooves for the T-shaped guide rails to be inserted into, and the side walls of the grooves of the T-shaped grooves are provided with T-shaped grooves. There is a first toothed portion; down the head; a pressing mechanism, the pressing head is connected to the pressing mechanism, and the pressing mechanism is used to drive the pressing head to press down into the T-shaped groove, so as to tighten the handrail of the elevator; A gear transmission mechanism, the gear transmission mechanism is arranged on the lower head, the gear transmission mechanism includes a power input gear and a first power output gear, and the first power output gear is used for the lower head. the elevator handrail is engaged with the first toothed portion when taut; and A synchronous transmission mechanism, the power input gear and the power unit are connected in a driving manner through the synchronous transmission mechanism. 2. The escalator according to claim 1, wherein the lower pressing head comprises a base body, a first side shifting block and a lower pressing block; the base body is connected with the pressing mechanism, and the power input gear is rotatably arranged on the base body; Both the first side shifting block and the lower pressing block are movably arranged on the base body, and the first power output gear is rotatably arranged on the first side shifting block; When the push-down mechanism drives the push-down head to push down, the push-down block can move upward relative to the base after contacting the bottom wall of the T-shaped groove to drive the first side-moving block The first power output gear is driven to move laterally inside the T-shaped groove, so that the first power output gear is engaged with the first toothed portion. 3. The escalator according to claim 2, wherein the lower pressing head further comprises a first elastic reset member and a second elastic reset member; the first elastic reset piece is arranged between the lower pressing block and the base body; The second elastic restoring member is arranged between the first side shifting block and the base body. 4. The escalator according to claim 2, wherein the lower pressing block has a first guiding slope for pushing the first side shifting block to move laterally; The first side shift block has a second guide slope for contacting with the first guide slope. 5. The escalator according to claim 2, wherein the first side shifting block has a pressing surface for abutting with the bottom wall of the T-shaped groove; When the pressing surface abuts against the bottom wall of the T-shaped groove, the first power output gear engages with the first toothed portion. 6 . The escalator according to claim 5 , wherein the gear transmission mechanism further comprises a second power output gear, and a groove side wall of the T-shaped groove is provided with the first tooth-shaped portion. 7 . the oppositely arranged second toothed portion; The lower pressing head further includes a second side shifting block, the second side shifting block is movably arranged on the base body, and the lower pressing block is located between the first side shifting block and the second side shifting block ; When the push-down mechanism drives the push-down head to push down, the push-down block can move upward relative to the base after contacting the bottom wall of the T-shaped groove to drive the first side-moving block and the second side shifting block respectively drive the first power output gear and the second power output gear to move to opposite sides in the T-shaped groove, so that the first power output gear and the second power output gear respectively engage with the first toothed portion and the second toothed portion. 7. The escalator according to claim 6, wherein the gear transmission mechanism further comprises a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a sixth gear and a seventh gear gear; The first gear and the second gear are rotatably connected with the first side shift block through the same first rotating shaft, and the first gear is meshed with the first power output gear; The third gear is rotatably arranged on the base body, the third gear meshes with the power input gear, and the second gear is used for connecting the first power output gear with the first toothed portion meshing with the third gear during meshing; The fourth gear and the fifth gear are rotatably connected with the second side shifting block through the same second shaft, and the fourth gear is meshed with the second power output gear; Both the sixth gear and the seventh gear can be rotatably arranged on the base body, the sixth gear is meshed with the power input gear, the seventh gear is meshed with the sixth gear, and the fifth gear is used for The seventh gear is engaged with the second power output gear when the second power output gear is engaged with the second toothed portion. 8. The escalator according to claim 1, wherein the pressing mechanism comprises a frame, a first connecting rod, a second connecting rod and a driving member; The frame, the first connecting rod, the lower pressing head and the second connecting rod are hinged in sequence to form a parallelogram mechanism; The driving member is used for driving the first link to rotate relative to the frame. 9. The escalator according to claim 8, wherein the driving member is a driving handle fixedly connected with the first connecting rod; The pressing mechanism further includes a locking device for locking the driving handle and the frame.

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