Elevator car drive transmission structure

Abstract

The present invention is applicable to the field of passenger elevators, and provides an elevator car drive transmission structure, including a car, an opening and closing door, a driving mechanism and a locking structure; the driving mechanism includes at least one screw rod fixedly installed in the ladder shaft, a gear sleeve screwed on each screw rod and a synchronous gear meshing with at least one group of gear sleeves, and the synchronous gear is driven to rotate by the driver; the locking structure includes at least one group of locking members movably installed on the car, and the locking member includes a driving end and an insertion end; under normal conditions, the driving end is retracted inside the car; when locking is working, the driving end is driven by an auxiliary structure to extend outward and abut against the opening and closing door, and the insertion end is driven to be inserted between the gear teeth of the synchronous gear during the opening process of the opening and closing door. Therefore, the present invention adds a locking structure to the screw-driven elevator, which can effectively reduce the drop phenomenon caused by the elevator being subjected to a large gravity difference. At the same time, a self-locking position is set at the opening and closing door to optimize the safety of the elevator.

Description

Technical Field

[0001] The present invention relates to the field of passenger elevators, and in particular to a driving transmission structure of an elevator car. Background Art

[0002] An elevator (vertical elevator) is a type of transportation equipment that transports pedestrians or goods vertically. Elevators on the market can be roughly divided into three types according to their application environment: cable-driven elevators used in high-rise buildings, hydraulic-driven elevators used in low-rise buildings (such as villas), and screw-driven elevators.

[0003] Among them, the screw-driven elevator used in villa elevators mainly includes a screw, a gear sleeve matched with its threaded transmission, and a driver that drives the gear sleeve to rotate. The car is driven by the driver and matched with the threaded transmission to realize lifting and lowering. Screw-driven elevators have the advantages of simple structure and easy installation. However, in contrast, the safety issue is an issue that screw-driven elevators have always needed to be optimized, such as the elevator drop problem. The locking of the floor position of the traditional car is mainly achieved by the braking resistance of the driver in the non-working state. When subjected to a large gravity difference (the weight carried by the car suddenly increases), it is very easy to have a height drop. This drop is extremely dangerous (it is easy to cause the elderly and children to fall), and it also reflects the stability problem of the elevator from the side.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] In view of the above-mentioned defects, the object of the present invention is to provide an elevator car drive transmission structure, which adds a locking structure to the screw-driven elevator, which can effectively reduce the drop phenomenon caused by the elevator being subjected to a large gravity difference. At the same time, a self-locking position is set at the opening and closing of the cabin door to optimize the safety of the elevator.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an elevator car drive transmission structure, including a car, an opening and closing door movably installed at the floor staircase position, a driving mechanism that drives the car to lift and lower, and a locking structure that locks the height position of the car after the opening and closing door is opened; the driving mechanism includes at least one screw rod fixedly installed in the stairwell, a gear sleeve screwed on each screw rod, and a synchronous gear meshing with at least one group of gear sleeves, and the synchronous gear is driven to rotate by a driver; the locking structure includes at least one group of locking members movably installed on the car, and the locking member includes a driving end and an insertion end; under normal conditions, the driving end is retracted inside the car; when locking, the driving end is driven by an auxiliary structure to extend outward and abut against the opening and closing door, and the insertion end is driven to be inserted between the gear teeth of the synchronous gear during the opening of the opening and closing door.

[0007] According to the elevator car driving transmission structure of the present invention, the synchronous gear is rotatably mounted on the car and meshes with the driving gear fixedly mounted on the output end of the driver.

[0008] According to the elevator car driving transmission structure of the present invention, the locking members are provided in two groups and are symmetrically arranged relative to the synchronous gear.

[0009] According to the elevator car drive transmission structure of the present invention, the opening and closing door is a double-leaf door structure; the two groups of locking members are symmetrically arranged relative to the double-leaf center of the opening and closing door.

[0010] According to the elevator car drive transmission structure of the present invention, the auxiliary structure includes a moving block that moves along the center direction of the opening and closing doors and a driving member that is connected to the moving block and drives it to move; when the moving block moves toward the opening and closing doors, the driving end of the locking member is partially pushed out of the internal space of the car and cooperates with the opening and closing doors.

[0011] According to the elevator car drive transmission structure of the present invention, a positioning structure for locking the opening and closing door in a closed state is provided at a predetermined position of the opening and closing door; the positioning structure includes a positioning member for connecting and fixing the opening and closing door to the side wall of the stair opening; when the driving end extends outward and abuts against the opening and closing door, the positioning work of the positioning member is cancelled.

[0012] According to the elevator car drive transmission structure of the present invention, the positioning member is a positioning pin that moves up and down, and a pressure block is provided at its end; the positioning member in a locked state is inserted into a positioning hole corresponding to the side wall of the ladder entrance; when the driving end extends outward and abuts against the opening and closing compartment door, the driving end squeezes the pressure block to move downward, and the end of the positioning pin falls out of the positioning hole.

[0013] According to the elevator car drive transmission structure of the present invention, the locking member includes a driving rocker arm and an insertion rocker arm which are compositely hinged to the car; the driving rocker arm and the insertion rocker arm are connected via a torsion spring.

[0014] The present invention provides an elevator car driving transmission structure, comprising a car, an opening and closing door movably installed at a floor staircase, a driving mechanism for driving the car to perform lifting and lowering operations, and a locking structure for locking the height position of the car after the opening and closing door is opened; the driving mechanism comprises at least one screw fixedly installed in the stairwell, a gear sleeve screwed on each screw, and a synchronous gear meshed with at least one set of gear sleeves, and the synchronous gear is driven to rotate by a driver; the locking structure comprises at least one set of locking members movably installed on the car, and the locking member comprises a driving end and an insertion end; under normal conditions, the driving end is retracted inside the car; during locking operation, the driving end is driven by an auxiliary structure to extend outward and abut against the opening and closing door, and the insertion end is driven to be inserted between the gear teeth of the synchronous gear during the opening of the opening and closing door. The present invention adds a locking structure to the screw-driven elevator, which can effectively reduce the drop phenomenon caused by the elevator being subjected to a large gravity difference, and at the same time, a self-locking position is set at the opening and closing door to optimize the safety of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the driving mechanism and locking structure of the present invention;

[0017] Figure 3 is a top view of the driving mechanism and locking structure of the present invention;

[0018] Figure 4 It is a schematic diagram of a driving mechanism with two sets of screw rods of the present invention;

[0019] Figure 5 It is a schematic diagram of a driving mechanism with three sets of screw rods of the present invention;

[0020] Figure 6 yes Figure 2 The enlarged view of the reversing positioning structure at the middle A part;

[0021] Figure 7 yes Figure 2 A magnified view of part B;

[0022] In the figure, 1-car, 2-opening and closing door, 31-gear sleeve, 32-synchronizing gear, 33-driver, 34-screw, 35-driving gear, 41-locking member, 411-driving end, 412-insertion end, 42-driving rocker arm, 43-insertion rocker arm, 44-push plate, 45-hook plate, 46-moving block, 51-positioning member, 52-pressing block, 53-reset spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] See also Figure 1 and Figure 2 The present invention provides an elevator car drive transmission structure, which includes a car 1, an opening and closing door 2 movably installed at a floor staircase, a driving mechanism for driving the car 1 to move up and down, and a locking structure for locking the height position of the car 1 after the opening and closing door 2 is opened; the opening and closing door 2 can select a structural type according to needs, such as an extended door, a double-opening door structure, etc. (all existing structures), and in the present embodiment, the opening and closing door 2 adopts a double-opening door structure.

[0025] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 The driving mechanism includes at least one screw 34 fixedly installed in the ladder shaft (the screw 34 is installed in a vertical state, and its ends are fixed corresponding to the top and bottom of the ladder shaft), a gear sleeve 31 screwed on each screw 34, and a synchronous gear 32 meshing with at least one set of gear sleeves 31. The gear sleeve 31 and the synchronous gear 32 are both rotatably installed on the car 1, and the synchronous gear is driven by the driver to rotate; the screw 34 can be adaptively selected according to the strength of stability. Multiple screws 34 (two, three or four, etc., Figure 4 and Figure 5 As shown), at the same time, the position of the screw rod 34 relative to the car 1 can also be adjusted by matching the number. The gear sleeve 31 is a sleeve structure with a gear structure arranged on the outer wall (the gear structure meshes with the synchronous gear 32), and the inner wall of the gear sleeve 31 is provided with a thread matched with the screw rod 34.

[0026] Furthermore, in order to facilitate the driver 33 to synchronously drive multiple gear sleeves 31 to rotate, the present application meshes the synchronous gear 32 with the multiple gear sleeves 31, and at the same time, meshes the synchronous gear 32 with the driving gear 35 fixedly installed at the output end of the driver 33.

[0027] When the driving mechanism drives the car 1 to move up and down, the driver 33 drives the driving gear 35 and the synchronous gear 32 to rotate, further driving the multiple gear sleeves 31 to rotate. Under the action of the threaded transmission, the gear sleeves 31 are driven up and down relative to the screw rod 34, further driving the movement of the car 1.

[0028] The locking structure includes at least one set of locking members 41 movably mounted on the car 1 , and the locking member 41 includes a driving end 411 and an insertion end 412 ;

[0029] Under normal conditions, the driving end 411 is retracted inside the car 1 to prevent the driving end 411 from causing interference in the lifting of the car 1, thereby affecting the lifting of the car 1. During the locking operation, the driving end 411 is driven by an auxiliary structure to extend outward and abut against the opening and closing door 2. During the opening process of the opening and closing door 2 (the driving structure that drives the opening and closing of the opening and closing door 2 is an existing structure, which is not the innovation of this application and is not described in detail), the driving insertion end 412 is inserted between the gear teeth of the synchronous gear 32. At this time, the locking member 41 performs rotational locking on the synchronous gear 32, further realizing the transmission locking of the gear sleeve 31 and the screw rod 34, and realizing the position locking of the car 1, thereby preventing the car 1 from having a "drop" due to a large gravity difference.

[0030] Further, in this embodiment, the driving work of the locking member 41 is driven by the opening and closing door 2, which has three advantages. First, the setting of the driving components is reduced, and the investment cost is reduced; second, the driving work of the opening and closing door 2 needs to ensure that the car 1 reaches a stable matching position, so it can be used as a position signal feedback; third, the locking member 41 can also react to the opening and closing door 2, and serve as a starting switch for starting the positioning member 51 of the opening and closing door 2 (which will be described in detail below); the locking member 41 is provided with two groups and is symmetrically arranged relative to the synchronous gear 32 ( Figure 3 The auxiliary structure includes a moving block 46 that moves along the center direction of the opening and closing door 2 and a driving member connected thereto and driving it to move (the driving member can be a signal-controlled electric cylinder, not shown in the figure); when the moving block 46 moves toward the opening and closing door 2, the driving end 411 of the locking member 41 is partially pushed out of the internal space of the car 1 and matched with the opening and closing door 2.

[0031] When the elevator car 1 reaches the landing position of the predetermined floor, the driving member drives the moving block 46 to move and push out the driving end 411 of the locking member 41, so that it cooperates with the opening and closing compartment door 2 (specifically, a dial plate 44 is provided at the cooperation position of the opening and closing compartment door 2, and the driving end 411 of the locking member 41 protruding outward extends into the inside of the dial plate 44, Figure 6 As shown), when the opening and closing door 2 is opened (moving to both sides, Figure 1 As shown by the arrow, the insertion end 412 of the locking member 41 can be driven to be inserted between the gear teeth of the synchronous gear 32 to achieve the locking work of the synchronous gear 32.

[0032] Preferably, the locking member 41 may be an integrated structure, that is, the driving end 411 and the insertion end 412 are arranged on the same component (an integrated molding structure).

[0033] See also Figure 2 , Figure 3 and Figure 7 , or as in this embodiment, in order to prevent the insertion end 412 from being opposite to the gear teeth of the synchronous gear 32 during the insertion operation (i.e., not inserted between the gear teeth of the synchronous gear 32, but in contact with the gear teeth), the locking operation cannot be performed in this state. To solve the above problem, the present application has made the following improvements: the locking member 41 includes a driving swing rod 42 and an insertion swing rod 43 that are compositely hinged to the car 1 (in this embodiment, the locking member 41 is not an integrated structure); the driving swing rod 42 and the insertion swing rod 43 are connected by a torsion spring. When the opening and closing door 2 is opened and the driving swing rod 42 is driven to swing, the insertion swing rod 43 also swings under the connection action of the torsion spring. When the insertion swing rod 43 contacts the gear teeth of the synchronous gear 32, as the insertion swing rod 43 continues to swing, the torsion spring is compressed. At this time, the end of the insertion swing rod 43 has a tendency to move toward the synchronous gear 32. At this time, if the car 1 has a drop, the insertion swing rod 43 can be inserted into the gap between the teeth of the adjacent position in time to reduce the height of the drop.

[0034] As for the resetting problem of the locking member 41, a torsion spring can also be provided at the hinge of the locking member 41 (that is, the driving rocker arm 42 is connected to the side wall of the car 1 through the torsion spring). During the closing process of the opening and closing door 2, the locking member 41 is reset under the elastic force of the torsion spring.

[0035] See also Figure 3 In order to increase the stability of the locking member 41 when it is reset, and to prevent the insertion end 412 of the locking member 41 from being unable to disengage from the synchronous gear 32, thereby affecting the driving operation of the car 1, the driving end 411 of the locking member 41 of the present application is provided with a hook plate 45 that cooperates with the moving block 46. After the opening and closing door 2 is closed, the moving block 46 cooperates with the hook plate 45 to pull the locking member 41 back to reset during the resetting process (the driving end 411 is retracted into the car 1, and the insertion end 412 is disengaged from the synchronous gear 32).

[0036] See also Figure 2 and Figure 6 In order to further increase the safety of the elevator equipment and prevent the opening and closing door 2 from being opened by external force during the lifting process of the car 1 (the so-called "door-pulling" phenomenon), the predetermined position of the opening and closing door 2 of the present application is provided with a positioning structure for locking it in a closed state; the positioning structure includes a positioning member 51 for connecting and fixing the opening and closing door 2 to the side wall of the staircase; when the driving end 411 extends outward and abuts against the opening and closing door 2, the positioning work of the positioning member 51 is cancelled. In this embodiment, the positioning member 51 is a positioning pin that moves up and down, and a pressure block 52 is provided at its end; the positioning member 51 in the locked state is inserted into the positioning hole corresponding to the side wall of the staircase;

[0037] When the driving end 411 extends outward and abuts against the opening and closing door 2, the driving end 411 squeezes the pressing block 52 to move downward (the driving end 411 is inserted into the upper space of the pressing block 52), and the downward movement of the pressing block 52 further drives the end of the positioning member 51 to disengage from the positioning hole.

[0038] The upper end of the pressing block 52 is also provided with a return spring 53 for returning the pressing block 52 after the driving end 411 is released from the squeezing.

[0039] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An elevator car drive transmission structure, characterized in that: It includes a car, an opening and closing door movably installed at the floor staircase position, a driving mechanism for driving the car to move up and down, and a locking structure for locking the height position of the car after the opening and closing door is opened; The driving mechanism comprises at least one screw fixedly mounted in the ladder shaft, a gear sleeve threadedly connected to each screw, and a synchronous gear meshed with at least one set of gear sleeves, wherein the synchronous gear is driven by a driver to rotate; The locking structure includes at least one set of locking members movably mounted on the car, the locking members including a driving end and an insertion end; In normal conditions, the drive end is retracted inside the car; When the locking is in operation, the driving end is driven by an auxiliary structure to extend outward and abut against the opening and closing door. During the opening process of the opening and closing door, the driving insertion end is inserted between the gear teeth of the synchronous gear.

2. The elevator car drive transmission structure according to claim 1, characterized in that: The synchronous gear is rotatably mounted on the car and meshes with a driving gear fixedly mounted on an output end of the driver.

3. The elevator car drive transmission structure according to claim 1, characterized in that: The locking members are provided in two groups and are symmetrically arranged relative to the synchronous gear.

4. The elevator car drive transmission structure according to claim 3, characterized in that: The opening and closing door is a double-opening door structure; The two groups of locking members are symmetrically arranged relative to the center of the opening and closing door.

5. The elevator car drive transmission structure according to claim 4, characterized in that: The auxiliary structure includes a moving block that moves along the center direction of the opening and closing of the warehouse door and a driving member that is connected to the moving block and drives the moving block to move; When the moving block moves toward the direction of opening and closing the cabin door, the driving end of the locking member is partially pushed out of the interior space of the car and matched with the opening and closing cabin door.

6. The elevator car drive transmission structure according to any one of claims 1 to 5, characterized in that: A positioning structure for locking the door in a closed state is provided at a predetermined position of the door; the positioning structure comprises a positioning member for connecting and fixing the door to the side wall of the stair opening; When the driving end extends outward and abuts against the opening and closing door, the positioning work of the positioning member is cancelled.

7. The elevator car drive transmission structure according to claim 6, characterized in that: The positioning member is a positioning pin that moves up and down, and a pressure block is provided at its end; the positioning member in the locked state is inserted into the positioning hole corresponding to the side wall of the ladder entrance; When the driving end extends outward and contacts the opening and closing door, the driving end squeezes the pressing block to move downward, and the end of the positioning pin escapes from the positioning hole.

8. The elevator car drive transmission structure according to any one of claims 1 to 5, characterized in that: The locking member comprises a driving rocker arm and an insertion rocker arm which are compositely hinged to the car; The driving rocker rod and the inserted rocker rod are connected via a torsion spring.

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