CN218619780U - Car settlement and rise limiting device for freight elevator - Google Patents

Abstract

The utility model provides a cage of freight elevator subsides and rises limiting device, including driver, micro-gap switch group, linkage subassembly, buffering subassembly and meshing subassembly, the driver transmission is connected the linkage subassembly, micro-gap switch group signal connection the driver, the buffering subassembly is connected the linkage subassembly respectively with the meshing subassembly; the meshing assembly comprises a tooth block seat, a tooth block and a rack, the tooth block is connected with the tooth block seat in a vertically floating mode, and the tooth block and the rack are arranged oppositely; the number of the racks is the same as the number of the elevator floors, and each rack is correspondingly arranged in each landing in the hoistway; adopt the utility model provides a car subsides and rises limiting device for cargo elevator, adorn at the car, unload can prevent that the car from appearing subsiding that is showing and rising in the process, reinforcing stationarity to the action is reliable, the installation is convenient, and has certain tolerance ability.

Description

Car settlement and rise limiting device for freight elevator

Technical Field

The utility model relates to a cargo elevator field particularly, relates to a car subsides and rises limiting device for cargo elevator.

Background

The traction type freight elevator car can cause elastic deformation of a suspension steel wire rope due to the change of the load of the car in the loading and unloading processes, so that the car can be caused to subside and rise, the fall of the floor of the car and a landing door opening can be caused, the goods can get in and out of the car to be obstructed, and particularly, the goods can be remarkably fluctuated when entering and exiting precise goods, so that the safety of the goods is influenced. Although the elevator can be provided with the electric functions of inching operation or automatic floor returning, the elevator needs to manually operate the elevator car to a floor leveling position at a slow speed every time the elevator car shifts due to loading and unloading of a part of goods, which is inconvenient and low in efficiency; the latter is usually started when the difference between the position of the car and the leveling position exceeds 20mm, and the difference is too significant and still unacceptable in many cases.

In many cases, different types of mechanical devices have been developed for securing the car in the flat position, but all have drawbacks. For example, a pawl type anti-settling device prevents the car from settling by extending a pawl on the side of the car, but cannot prevent the car from rising when unloading; the brake type is that the car is fixed by clamping a guide rail or a brake disc through a brake disc, the device has a complex structure, is inconvenient to install and has high failure rate, and the function can be realized only by continuously providing larger clamping force; the bolt type is that a bolt extends out of the side of the lift car and penetrates into a bolt hole fixed in a shaft to play a role in fixing, the device is easy to have the problem that the bolt is staggered in the hole due to flat bed deviation, and particularly, under the condition that a plurality of sets of devices are installed on one lift and the load capacity of the lift car is large, the problem that the bolt is difficult to pull out due to overlarge radial stress easily occurs.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides a car subsides and rises restraining device for cargo elevator, the device simple structure, the action is reliable, installation and maintenance are convenient, can improve the defect of current similar function device, have better suitability to cargo elevator; the elevator car can be prevented from obviously settling and rising in the process of assembling and disassembling the elevator car, the stability is enhanced, the operation is reliable, the installation is convenient, and certain tolerance capability is realized.

The utility model provides a cage of freight elevator subsides and rises limiting device, including driver, micro-gap switch group, linkage subassembly, buffering subassembly and meshing subassembly, the driver transmission is connected the linkage subassembly, micro-gap switch group signal connection the driver, the buffering subassembly is connected the linkage subassembly respectively with the meshing subassembly; the meshing assembly comprises a tooth block seat, a tooth block and a rack, the tooth block is connected with the tooth block seat in a vertically floating mode, and the tooth block and the rack are arranged oppositely; the number of the racks is the same as the number of the elevator floors, and each rack is correspondingly arranged in each landing in the hoistway.

Furthermore, the linkage assembly comprises an action rod and a linkage rod, the buffer assembly comprises a damper, one end of the linkage rod is connected with the driving end of the action rod, the other end of the linkage rod is connected with the damper, the other end of the damper is connected with the tooth block seat, and the driver is in transmission connection with the action rod.

Further, the buffering assembly further comprises a compression spring arranged at the side end of the tooth block seat.

Further, the micro switch set includes a disengagement switch, a push switch, and an engagement switch.

Furthermore, a switch groove is arranged on the action rod.

Further, the hardness of the tooth block is smaller than that of the rack.

Further, the driver comprises an electromagnet, an electric screw rod and a hydraulic actuating cylinder.

Further, the back face of the rack is fixed on a ring beam, a structural beam or a guide rail of each landing of the hoistway through a bracket.

Furthermore, a mounting groove is formed in the tooth block seat, the side face of the tooth block is inserted into the mounting groove, and the tooth block seat and the mounting groove are connected through a pin shaft.

Furthermore, the tail part of the pin shaft is provided with a pin spring and a screw.

The utility model provides a car subsides and rises limiting device for cargo elevator, the action of driver drive linkage subassembly, make the tooth piece can be relative the rack do near and the motion that breaks away from, the linkage subassembly links to each other with the buffering subassembly and assaults in order to slow down the motion, provide the holding power when enabling tooth piece and rack meshing simultaneously, micro-gap switch group provides the position signal of tooth piece through the action state of linkage subassembly, acquire the signal of tooth piece position state through micro-gap switch group, provide the signal when the tooth piece is in the three states of retracting, near and meshing, so that the control system of elevator can rely on this signal operation elevator or judge whether normal action of this device; only when the tooth block is in a retraction state, the elevator can run, and the elevator is in a flat position, after the device is started, the tooth block can be in an approaching and meshing state, so that the safety is better; the elevator car can be prevented from obviously settling and rising due to the elastic deformation of the suspension steel wire rope caused by the great change of the mass of the elevator car when the elevator car is loaded and unloaded; in general, the device has simple structure, reliable action and convenient installation and maintenance, can improve the defects of the prior similar functional devices, and has better applicability to the cargo elevator; the elevator car can be prevented from obviously settling and rising in the process of assembling and disassembling the elevator car, the stability is enhanced, the operation is reliable, the installation is convenient, and certain tolerance capability is realized.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural view of a car sinking and rising limiting device for a freight elevator provided by an embodiment of the invention;

FIG. 2 is a schematic view of the installation of the tooth block and the tooth block seat of the present invention;

fig. 3 is one of the schematic diagrams of the micro switch set of the present invention;

FIG. 4 is a second schematic diagram of the micro switch set of the present invention;

fig. 5 is a third schematic diagram of the micro switch set of the present invention;

fig. 6 is a schematic view of the installation of the present invention in an elevator car frame.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The first embodiment is as follows:

referring to fig. 1, the car settlement and rise limiting device for cargo lift provided by the first embodiment of the present invention is shown in the figure, and includes a driver 1, a micro switch set, a linkage component, a buffer component and an engagement component, wherein the driver 1 is connected with the linkage component in a transmission manner, the micro switch set is connected with the driver 1 in a signal manner, and the buffer component is respectively connected with the linkage component and the engagement component; the meshing assembly comprises a tooth block seat 21, a tooth block 22 and a rack 23, the tooth block 22 is connected with the tooth block seat 21 in a vertically floating mode, and the tooth block 22 and the rack 23 are arranged oppositely; the number of the racks 23 is the same as the number of elevator floors, and each rack 23 is provided in each landing in the hoistway 3. The driver 1 comprises an electromagnet, an electric screw rod and a hydraulic actuating cylinder.

According to the elevator car settlement and rise limiting device for the freight elevator, the driver 1 drives the linkage assembly to move, so that the tooth block 22 can move close to and separate from the rack 23, the linkage assembly is connected with the buffer assembly to reduce movement impact, meanwhile, the tooth block 22 can provide a holding force when being meshed with the rack 23, the microswitch assembly provides a position signal of the tooth block 22 through the action state of the linkage assembly, the microswitch assembly acquires the signal of the position state of the tooth block, and the tooth block 22 provides signals in three states of retraction, close to and meshing, so that a control system of the elevator can operate the elevator or judge whether the device normally operates according to the signal; only when the tooth block 22 is in a retraction state, the elevator can run, and the elevator is in a flat position, after the device is started, the tooth block 22 can be in an approaching and meshing state, so that the safety is better; the elevator car can be prevented from obviously settling and rising due to the elastic deformation of the suspension steel wire rope caused by the great change of the mass of the elevator car when the elevator car is loaded and unloaded; in general, the device has simple structure, reliable action and convenient installation and maintenance, can improve the defects of the prior similar functional devices, and has better applicability to the cargo elevator; the elevator car can be prevented from obviously settling and rising in the process of assembling and disassembling the elevator car, the stability is enhanced, the operation is reliable, the installation is convenient, and certain tolerance capability is realized.

Example two:

referring to fig. 1, a car sedimentation and ascending limiting device for a freight elevator provided by the second embodiment of the present invention is shown, and the present embodiment further makes the following technical solutions as improvements on the basis of the above embodiment: the linkage assembly comprises an action rod 41 and a linkage rod 42, the buffer assembly comprises a damper 51, one end of the linkage rod 42 is connected with the driving end of the action rod 41, the other end of the linkage rod 42 is connected with the damper 51, the other end of the damper 51 is connected with the tooth block seat 21, and the driver 1 is in transmission connection with the action rod 41; the damping assembly further includes a compression spring 52 disposed at a side end of the tooth block seat 21.

Through the above further improvement, the present embodiment has the following advantages compared with the prior art: the head end of the linkage assembly is connected with the driver 1, the tail end of the linkage assembly is connected with the tooth block seat 21, the middle of the linkage assembly is connected with the damper 52, power generated by the driver 1 is transmitted to the tail end from the head end to generate stretching and contracting movement, and impact generated by instantaneous movement is reduced through the damper, so that the running stability is improved.

Example three:

referring to fig. 1-5, a car sedimentation and ascending limiting device for a freight elevator provided by the third embodiment of the present invention is shown, and the present embodiment further makes the following technical solutions as improvements on the basis of the above embodiments: the micro switch group comprises a disengaging switch 61, a pushing switch 62 and an engaging switch 63; the operating lever 41 is provided with a switch slot 411. The trigger rod of the micro switch group and the action rod 41 act integrally, and the position of the action rod 41 and the position of the tooth block 22 have corresponding relation, so that when the tooth block 22 is at different positions, the convex surface and the concave surface on the action rod 41 can accurately trigger the micro switch group. When the rack block 22 is in a completely disengaged state from the rack 23, the disengagement switch 61 is activated, and the other switches are not activated, see fig. 3. When the tooth block 22 is in contact with the rack 23, i.e., when the tooth top surface of the tooth block 22 and the tooth top surface of the rack 23 coincide, the push switch 62 is activated, and the other switches are not activated, see fig. 4. When the rack block 22 is in the engaged state with the rack 23, the engaging switch 63 and the pushing switch 62 are activated, and the disengaging switch 61 is not activated, see fig. 5.

Through the above further improvement, the present embodiment has the following advantages compared with the prior art: the micro switch group provides corresponding signals to an elevator control system according to different relative positions of the tooth block 21 and the rack 23 so as to control the elevator to be started and stopped properly, so that the elevator runs more accurately and has stronger stability.

Example four:

referring to fig. 1, a car sedimentation and ascending limiting device for a freight elevator according to a fourth embodiment of the present invention is shown, and the present embodiment further provides the following technical solutions as improvements on the basis of the above embodiment: the hardness of the tooth block 22 is less than that of the rack 23. The installation quantity and the manufacturing cost of the rack 23 are more than those of the toothed block 22, so that the hardness and the strength of the material of the tooth surface of the toothed block 22 are less than those of the material of the tooth surface of the rack 23, the rack 23 is in a protected state in the using process, the abrasion condition is better than that of the toothed block 22, and only the toothed block 22 needs to be replaced after long-term use and abrasion.

Through the above further improvement, the present embodiment has the following advantages compared with the prior art: the hardness of the material of the tooth block 22 is smaller than that of the rack 23, so that the tooth block is firstly worn after long-term use, can be quickly replaced, is more convenient for later maintenance, and reduces the cost.

Example five:

referring to fig. 2, a fifth embodiment of the present invention provides a car sedimentation and ascending limiting device for cargo elevator, which is further provided with the following technical solutions as improvements on the basis of the above embodiment: the tooth block seat 21 is provided with a mounting groove 211, the side surface of the tooth block 22 is inserted in the mounting groove 211, and the tooth block seat and the mounting groove are connected through a pin shaft 24; the pin shaft 24 is provided at its rear portion with a pin spring 25 and a screw 26. Specifically, the block holder 21 and the block 22 are detachably assembled. The protruding portion of the back of the tooth block 22 is installed in the installation groove 211 of the tooth block seat 21, the pin shaft 24 penetrates through the pin hole of the tooth block seat 21 to fix the tooth block 22 in a vertical positioning mode, and after the tooth block 22 is installed, the installation groove 211 is provided with gaps in the vertical direction so that the tooth block 22 has a certain space floating up and down in the tooth block seat 21. The tail of the pin shaft 24 is pressed by a pin spring 25, and the end of the pin spring 25 is fixed by a screw 26. The resistance to floating and the initial position of the block 22 in the block seat 21 can be adjusted by screwing the two screws 26. When the tooth block 22 approaches the rack 23 for contact, if the teeth are not in the meshing position, the tooth block 22 can be automatically aligned and meshed by means of up-and-down floating. The tooth block 22 floats up and down and serves as a buffer during flank contact impact.

Through the above further improvement, the present embodiment has the following advantages compared with the prior art: the tooth block 22 is arranged in the tooth block seat 21 in a way of being convenient to take out and replace; the tooth block 22 has a certain up-and-down floating capacity in the tooth block seat 21, and can be meshed in place by the up-and-down floating of the tooth block 22 in the case of deviation of the elevator flat floor. After the toothed block 22 is meshed with the rack 23, the distance that the cage can move up and down is limited within the distance that the toothed block 22 floats up and down in the toothed block seat 21. The tooth blocks 22 and the rack 23 do not mesh completely when the elevator is on a flat floor, and the slight settlement of the car during loading and unloading also allows the teeth to mesh with the teeth. The device allows the elevator car to float up and down within a small range from the elevator car leveling to the elevator car fixing, so that the requirement of the device on the elevator car leveling precision is lowered, and the elevator car structure has small self-adaptive deformation capacity under the condition of stress.

When the elevator is in the running state, the tooth block 22 of the utility model is in the retraction position, when the elevator reaches the leveling position and stops, the tooth block 22 stretches out and engages with the rack 23 to make the up-and-down movement of the car limited. The length of the rack 23 is larger than that of the block 22, so that even if the block 22 deviates from the middle section of the rack due to flat layer deviation, all the teeth on the block 22 can be meshed through redundant teeth on the rack 23. After meshing, the teeth are acted by the force generated by the contact of the tooth surfaces, the tooth block 22 and the rack 23 absorb large force in the vertical direction due to the inclination angle of the tooth surfaces, the meshing state can be maintained by applying small force of the tooth block 22 against the rack in the horizontal direction, and the tooth block 22 can be separated from the rack 23 by applying small reverse force, so that the operation force required by the device for operating and maintaining is small.

Example six:

referring to fig. 6, a car sedimentation and ascending limiting device for a freight elevator according to a sixth embodiment of the present invention is shown, and the present embodiment further provides the following technical solutions as improvements on the basis of the above embodiment: the device consists of two parts, wherein one part is a rack 23, and the rack 23 consists of a plurality of same racks 23, the back of the rack 23 is fixed near each landing in the hoistway 3 through a bracket, and can be fixed on a ring beam or a structural beam of a hoistway wall or a guide rail, wherein the fixation on the guide rail is preferred so as to facilitate the position adjustment in the up-and-down direction; the rest parts are the other parts, and can form an integral machine base through a machine frame or a machine case, and the integral machine base is arranged on the bridge carriage frame 71. The two parts are mounted in such a manner that when the car 72 is in the flat position, the teeth on the block 22 are engaged with the teeth in the middle position of the landing rack 23 after the block 22 is extended. A plurality of sets of the device can be installed, and the number of teeth of the tooth blocks and the tooth racks can be increased or decreased to adapt to different elevator load capacity requirements.

Through the above further improvement, the present embodiment has the following advantages compared with the prior art: the machine base is mounted on the upper part of the car frame 71, and the rack 23 is mounted on the guide rail through a bracket. The relative positions of the frame and the rack 23 ensure that the teeth of the toothed block 22 and the rack 23 can mesh with each other in the flat position of each landing. When the elevator runs, the driver 1 is electrified, the rack 2 is at the retraction position, and the disconnecting switch 7 is in a triggering state.

When the elevator stops at a certain landing, the elevator control system controls the power failure of the driver 1, the tooth block 22 is abutted to the rack 23 due to the elastic force of the compression spring 52, the disconnecting switch 61 resets at the moment, and when the disconnecting switch 61 is reset, namely in a non-triggering state, the elevator control system does not allow the elevator to run. When the tooth block 22 approaches to contact the rack 23, the push switch 62 is triggered to indicate that the elevator is in normal operation. When the tooth block 22 is accurately meshed with the rack 23, the meshing switch 63 is triggered to indicate that the operation of the embodiment is finished, and the elevator can be opened for loading and unloading. When the tooth block 22 and the rack 23 are in a contact state and then do not enter an engagement state at a later time, namely the engagement switch 63 is not triggered, the tooth tops of the tooth block 22 and the rack 23 are just abutted, the tooth block 22 cannot be self-adjusted to enter the engagement state through up-down floating, the elevator can still open the door to load and unload the elevator, when the elevator car has tiny settlement due to the load and unload, the tooth top of the tooth block 22 and the tooth top of the rack 23 are dislocated immediately, the tooth block 22 and the rack 23 can be engaged, and the engagement switch 63 is triggered to prompt that the action is finished. The disengagement switch 61 is not activated from the tooth block 22 throughout the travel from the retracted position, and the elevator is not able to run. The push switch 62 is in the trigger state from the contact to the full mesh of the toothed block 22 and the rack 23, and the elevator can be loaded or unloaded by opening the door. The engagement switch 63 can only be triggered when the toothed block 22 and the toothed rack 23 are in the engaged position. Two indicator lights may be provided on the console box within the car 72 to indicate whether the car is in the contact and engaged positions, respectively, so that the elevator user can know the operating conditions within the car 72. When the elevator finishes loading, unloading and door closing in place, the elevator control system controls the driver 1 to be electrified, the tooth block 22 is separated from the rack 23, when the tooth block 22 retracts to the place, the separation switch 61 is triggered again, the operation limitation of the elevator is released immediately, the elevator can operate to reach the next landing, and the process is repeated.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. The cage settlement and rise limiting device for the freight elevator is characterized by comprising a driver (1), a microswitch set, a linkage assembly, a buffer assembly and an engagement assembly, wherein the driver (1) is in transmission connection with the linkage assembly, the microswitch set is in signal connection with the driver (1), and the buffer assembly is respectively connected with the linkage assembly and the engagement assembly; the meshing assembly comprises a tooth block seat (21), a tooth block (22) and a rack (23), the tooth block (22) is connected with the tooth block seat (21) in a vertically floating mode, and the tooth block (22) is opposite to the rack (23); the number of the racks (23) is the same as the number of elevator floors, and each rack (23) is correspondingly arranged in each landing in the hoistway (3).

2. The cage descending and ascending limiting device for the freight elevator as claimed in claim 1, wherein the linkage assembly comprises an action rod (41) and a linkage rod (42), the buffer assembly comprises a damper (51), one end of the linkage rod (42) is connected with the driving end of the action rod (41), the other end of the linkage rod is connected with the damper (51), the other end of the damper (51) is connected with the tooth block seat (21), and the driver (1) is in transmission connection with the action rod (41).

3. The cage sinking and rising limiting device for cargo elevator according to claim 2, wherein the buffering assembly further comprises a compression spring (52) provided at a side end of the tooth block seat (21).

4. The cage lowering and rising limit device for cargo elevator according to claim 3, wherein the micro switch group includes a disengagement switch (61), a push switch (62) and an engagement switch (63).

5. The cage descending and ascending limit device for cargo elevator according to claim 4, wherein the operating lever (41) is provided with a switch slot (411).

6. The cage lowering and rising restricting device for a cargo elevator according to claim 5, wherein the hardness of the tooth block (22) is smaller than the hardness of the rack (23).

7. The car settlement and ascent restriction device for a freight elevator according to claim 6, wherein the driver (1) includes an electromagnet, an electric screw, and a hydraulic cylinder.

8. The cage sinking and rising limiting device for cargo elevator according to claim 7, wherein the tooth block seat (21) is provided with a mounting groove (211), the side surface of the tooth block (22) is inserted into the mounting groove (211), and the tooth block seat and the mounting groove are connected by a pin shaft (24).

9. The cage lowering and rising restricting device for cargo elevator according to claim 8, characterized in that the pin spring (25) and the screw (26) are provided at the end of the pin shaft (24).

10. A car sinking and rising restriction device for a freight elevator according to claim 1 or 9, characterized in that the back side of the rack (23) is fixed by means of a bracket to a collar beam, a structural beam or a guide rail of each landing hoistway wall (31) of the hoistway.

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