CN213950276U - Screw rod drive formula home use elevator - Google Patents

Abstract

The utility model relates to a screw drive formula home use elevator, including well, car, spiral elevator piece, screw rod, motor drive portion and increase journey mechanism. The range extending mechanism comprises a bearing part, a movable pulley block, a fixed pulley block and a traction part. The bearing piece is fixedly connected with the top wall of the well. The motor driving part is used for driving the screw rod. The screw rod is arranged right in front of the force bearing piece. The screw lifting block is sleeved on the screw rod, moves up and down along the screw rod and is provided with a through threaded hole matched with the screw rod. The movable pulley block is composed of a plurality of movable pulleys which are linearly arranged. The movable pulley is fixed on the spiral lifting block and carries out synchronous displacement motion along with the spiral lifting block. The fixed pulley block is arranged under the movable pulley block and is composed of a plurality of fixed pulleys fixed on the force bearing piece. The traction part is sequentially wound on the fixed pulley and the movable pulley, the fixed end of the traction part is fixed with the force bearing part, and the traction end of the traction part drags the cage to move.

Description

Screw rod drive formula home use elevator

Technical Field

The utility model belongs to the technical field of home use elevator makes technique and specifically relates to a screw drive formula home use elevator.

Background

With the development of economy, the utilization rate of the elevator in the service industry and the life of residents is higher and higher, so that the use amount of the elevator is larger and larger. In order to ensure the smooth running and the long service life of the elevator, the requirement on a transmission control device of the elevator is high. The screw elevator adopts a screw transmission mode, and the transmission control device is simple and easy to control, and is more and more widely applied to the home elevator.

In the prior art, a screw elevator includes a hoistway, a car, screws adapted to the screws, and a motor driving part. When the motor driving part acts, the driving screw rod rotates around the central axis of the driving screw rod in the circumferential direction to drive the screw to perform reciprocating displacement motion in the up-down direction, and the cage and the screw are fixed and perform synchronous displacement motion. However, this solution has the following problems: as shown in fig. 1, the length of the screw required in the above technical solution is substantially the same as the length of the hoistway (at least not less than the limit stroke of the car), so that the overall rigidity of the car is slightly poor, and the car is easily shaken during the displacement process, which affects the riding comfort of passengers. Thus, a skilled person is urgently needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a screw rod drive formula home use elevator, its screw rod length is shorter relatively, ensures that the elevator has better stationarity at the operation in-process.

In order to solve the technical problem, the utility model relates to a screw drive formula home use elevator, it includes well, car and car drive division. The car driving part comprises a spiral lifting block, a screw rod, a motor driving part and a range extending mechanism. The range extending mechanism comprises a bearing part, a movable pulley block, a fixed pulley block and a traction part. The bearing piece is vertically arranged and fixed with the top wall of the well. The motor driving part is arranged at the top of the well and used for driving the screw to perform circumferential rotation motion around the central axis of the screw. The screw rod is arranged right in front of the force bearing piece. The screw lifting block is sleeved on the screw rod, moves up and down along the screw rod and is provided with a through threaded hole matched with the screw rod. The movable pulley block is composed of a plurality of movable pulleys which are linearly arranged along the vertical direction. The movable pulley is detachably fixed on the left/right side wall of the spiral lifting block and moves synchronously along with the spiral lifting block in a displacement manner. The fixed pulley block is arranged under the movable pulley block and is composed of a plurality of fixed pulleys which are arrayed along the up-down direction and are detachably fixed on the force bearing piece. The traction part is sequentially wound on the fixed pulley and the movable pulley, the fixed end of the traction part is fixed with the force bearing part, and the traction end of the traction part drags the cage to move along the up-down direction.

As the utility model discloses technical scheme's further improvement, the quantity that increases the journey mechanism sets up to 2, and arranges in the left and right side of spiral elevator symmetrically.

As the technical scheme of the utility model is further improved, to the unilateral mechanism of increasing journey, the number of movable pulley is 3, and the number of fixed pulley is 2.

As the technical proposal of the utility model is further improved, the car driving part also comprises an auxiliary supporting plate. The number of the auxiliary supporting plates is set to be 2, and the auxiliary supporting plates are symmetrically arranged on the left side and the right side of the force bearing piece. The two end parts of the auxiliary supporting plate are detachably connected with the bearing part and the well respectively by means of fasteners.

As a further improvement of the technical proposal of the utility model, the range extending mechanism also comprises a rope blocking rod component. The rope blocking rod component is composed of a plurality of rope blocking rods which are arranged around the periphery of the movable pulley and the fixed pulley.

As the further improvement of the technical proposal of the utility model, the pulling piece is preferably a steel belt.

As a further improvement of the technical proposal of the utility model, the range extending mechanism also comprises a guide roller component. The guide wheel assembly comprises a left guide roller and a right guide roller. The left guide roller and the right guide roller are respectively pivoted on the left side wall and the right side wall of the spiral lifting block and are always attached to the force bearing piece to freely roll.

As the technical scheme of the utility model improve further, left guide roller is inlayed by left guide roller body and left rubber wheel rim cover and is formed. The right guide roller is formed by embedding a right guide roller body and a right rubber rim sleeve.

Compare in the screw rod drive formula home use elevator of traditional project organization the utility model discloses an among the technical scheme, it additionally has been increased journey mechanism. When the motor driving part acts, the driving screw rod performs circumferential rotation motion around the central axis of the driving screw rod, so that the spiral lifting block is driven to perform reciprocating displacement motion along the vertical direction, and the movable pulley component and the spiral lifting block are fixed and perform synchronous motion along with the movable pulley component. Assuming that the distance of the spiral lifting block along the vertical direction in one-time running is a, the displacement distance of the car is n multiplied by a, wherein n is a range increasing coefficient. Therefore, on one hand, the overall design length of the screw is effectively shortened, so that the screw has higher rigidity, and the running stability of the elevator is ensured; on the other hand, the range extending mechanism has a larger reduction ratio, so that the overall design size of the car driving part is effectively reduced, and the space layout is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of a screw-driven home elevator in the related art.

Fig. 2 is a perspective view of the middle screw rod driven home elevator of the present invention.

Fig. 3 is a schematic perspective view of a first embodiment of a range extending mechanism in a screw-driven home elevator according to the present invention.

Fig. 4 is a front view of fig. 3.

Fig. 5 is a sectional view a-a of fig. 4.

Fig. 6 is a schematic perspective view of a second embodiment of the range extending mechanism in the screw-driven home elevator of the present invention.

1-a well; 2-a car; 3-a car drive section; 31-a spiral lifting block; 32-screw rod; 33-a motor drive; 34-a range extending mechanism; 341-force bearing part; 342-a movable pulley block; 3421-a movable pulley; 343-fixed pulley group; 3431-fixed pulley; 344-a pull; 345-a rope stop lever assembly; 3451-rope blocking bar; 346-a guide roller assembly; 3461-left guide roller; 3462-right guide roller; 35-protective cover.

Detailed Description

In the description of the present invention, it is to be understood that the terms "left", "right", "front", "back", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In order to facilitate the technical solution disclosed in the present invention to be fully understood by those skilled in the art, the following detailed description is made in conjunction with the specific embodiments, and fig. 2 shows a schematic perspective view of a screw-driven home elevator according to the present invention, which is mainly composed of a hoistway 1, a car 2 (only a car bracket is shown in the figure), and a car driving part 3. The car driving part 3 includes a spiral lifting block 31, a screw 32, a motor driving part 33, and a range extending mechanism 34 (shown in fig. 3). When the motor driving unit 33 is operated, the driving screw 32 performs a circumferential rotation motion around the central axis thereof, and further, the screw elevating block 31 is driven to perform a reciprocating displacement motion in the vertical direction, and at the same time, the stroke increasing mechanism 34 operates accordingly. Assuming that the distance of the one-time travel spiral elevating block 31 in the up-down direction is a, the displacement distance of the car 2 is n × a, where n is the range-increasing coefficient of the range-increasing mechanism 34. Therefore, on one hand, the overall design length of the screw 32 is effectively shortened, so that the screw has higher rigidity, and the running stability of the elevator is ensured; on the other hand, the range extending mechanism has a larger reduction ratio, so that the overall design size of the car driving part is effectively reduced, and the space layout is facilitated.

Various means are known for realizing the structural design of the range extending mechanism 34, however, a preferred scheme with simple structural design, easy implementation and high convenience of later maintenance is recommended here, which is specifically as follows: fig. 4 and 5 respectively show a schematic perspective view and a sectional view a-a of the range extending mechanism of the screw-driven home elevator of the present invention, and it can be seen that the range extending mechanism mainly comprises a bearing member 341, a movable pulley block 342, a fixed pulley block 343, a pulling member 344, and the like. The force-bearing member 341 is vertically disposed and detachably fixed to the top wall of the hoistway 1. The motor drive 33 is arranged and mounted at the top of the hoistway 1 for driving the screw 32 in a circumferential rotational movement about its central axis. The screw 32 is disposed directly in front of the force bearing member 341. The screw elevating block 31 is fitted over the screw rod 32, performs a circumferential screw motion around the screw rod 32, and has a through-shaped screw hole formed therein, which is adapted to the screw rod 32. The movable pulley block 342 is composed of 3 movable pulleys 3421 linearly arranged in the up-down direction. The movable pulley 3421 is detachably fixed to the screw elevating block 31 and performs a synchronous displacement motion following the screw elevating block 31. The fixed pulley group 343 is disposed directly below the movable pulley group 342, and is composed of 2 fixed pulleys 3431 which are arrayed in the up-down direction and detachably fixed to the force bearing member. The pulling member 344 is sequentially wound around the fixed pulley 3431 and the movable pulley 3421, and the fixed end thereof is fixed to the force-bearing member 341, and the pulling end thereof pulls the car 2 to move up and down.

It should be noted that the range-extending coefficient n is in a one-to-one correspondence relationship with the specific number of the movable pulleys 3421, and therefore, the specific number of the movable pulleys 3421 and the corresponding fixed pulleys 3431 needs to be set according to the specific value of the range-extending coefficient n.

In order to ensure the balance of the dragging force to which the car 2 is subjected during the actual operation and avoid the occurrence of the "bias pull" phenomenon, the number of the range-extending mechanisms 34 is preferably set to 2, and the range-extending mechanisms are symmetrically arranged on the left and right sides of the spiral lifting block 31. The movable pulleys 3421 are paired and symmetrically fixed to the left and right side walls of the spiral elevator 31. The fixed pulleys 3431 are paired and symmetrically fixed to the left and right side walls of the force bearing member 341 (as shown in fig. 3 and 4).

In addition, as is clear from fig. 3, the motor driving section 33 is formed by combining a rotating electric machine and a reduction gear box. Of course, as a modified design of the above technical solution, the motor driving part 33 may also be a direct-drive voice coil motor according to actual situations, so as to effectively reduce the requirement for installation space, and the failure rate of the elevator is obviously reduced.

As is known, in the actual operation process of the home elevator, the force-bearing member 341 inevitably generates "shake", which causes working noise, and even affects the normal operation of the range-extending mechanism 34, in view of this, an auxiliary support plate (not shown in the figure) may be added to the car driving part 3 according to the actual situation. The number of the auxiliary supporting plates is set to be 2, and the auxiliary supporting plates are symmetrically arranged on the left side and the right side of the force bearing member 341. The auxiliary supporting plate is connected and fixed between the force bearing member 341 and the hoistway 1.

In view of the convenience of subsequently detaching and replacing the auxiliary support plate, the auxiliary support plate is preferably detachably coupled to the force bearing member 341 and the hoistway 1 by means of fastening screws. A threaded hole matched with the fastening screw is formed in the force bearing part 341; just corresponding to the threaded hole, a coupling through hole (not shown in the figure) for the fastening screw to pass through is formed on the auxiliary supporting plate.

Further, in order to adjust the inclination of the force-bearing member 341 so as to maintain the vertical state, the coupling through hole is preferably a long waist-shaped hole extending in the left-right direction. Therefore, in the process of initial installation and subsequent maintenance of the force bearing plate 341, after the relative orientation of the force bearing member 341 is adjusted to the proper position, the fastening screw is locked on the long waist-shaped hole in time.

Steel belts are known to have at least the following advantages over steel wire ropes: 1) the contact area of the steel belt is large, and the transmission efficiency is high; 2) frequent maintenance is not required to be carried out on the device; 3) the service life of the steel belt is 2-3 times longer than that of the traditional steel wire rope; 4) the steel belt has good flexibility, and can effectively reduce the vibration generated in the running process of the elevator; 5) under the condition of the same drawing force, the dead weight of the steel belt is more than 20% lighter than that of the traditional steel wire rope. In this regard, the pull 344 is preferably a steel strip.

It is known that the steel belt inevitably causes a "belt jump" relative to the movable pulley 3421 and the fixed pulley 3431 at the initial start or stop moment of the motor driving part 33, and therefore, the car driving part may be additionally provided with a rope blocking lever assembly 345 according to actual conditions. The rope stopper rod assembly 345 is constituted by a plurality of rope stopper rods 3451 arranged around the outer peripheries of the above-described movable pulley 3421 and fixed pulley 3431.

As a further optimization of the structure of the screw-driven home elevator, a guide roller assembly 346 can be added according to actual conditions. The guide wheel assembly 36 includes a left guide roller 3461 and a right guide roller 3462. The left guide roller 3461 and the right guide roller 3462 are respectively pivoted to the left and right sidewalls of the spiral lifting block 31, and are always in contact with the force bearing member 341 to freely roll (as shown in fig. 3, 4 and 5). Therefore, the displacement stability of the spiral lifting block 31 is effectively improved, and the efficiency of the range extending mechanism 34 is ensured to be exerted to the maximum extent.

It should be noted that the left guide roller 3461 is preferably formed by embedding a left guide roller body and a left rubber rim sleeve. The right guide roller 3462 is preferably formed by a right guide roller body and a right rubber rim sleeve (not shown). The existence of the left rubber wheel rim sleeve and the right rubber wheel rim sleeve not only effectively reduces the working noise of the spiral lifting block 31 in the displacement process, but also improves the relative friction force between the left guide roller 3461, the right guide roller 3462 and the force bearing part 341, thereby avoiding the occurrence of the 'slipping' phenomenon.

Fig. 6 shows a schematic perspective view of a second embodiment of the range extending mechanism in the screw-driven home elevator of the present invention, which is different from the first embodiment only in that: a protective cover 35 is additionally provided, which covers the periphery of the range extending mechanism 34. And the protective cover 35 is detachably fixed to the force bearing member 341 by means of screws. By adopting the technical scheme, external dust or impurities can be effectively prevented from entering the range-extending mechanism 34, so that on one hand, the range-extending mechanism 34 is always kept in a stable and normal running state; on the other hand, the abrasion rate of the steel belt, the movable pulley and the fixed pulley is reduced as much as possible, the service life is prolonged, and the later maintenance frequency of the range extending mechanism 34 is reduced.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A screw-driven home elevator is characterized by comprising a hoistway, a car and a car driving part; the car driving part comprises a spiral lifting block, a screw rod, a motor driving part and a range extending mechanism; the range extending mechanism comprises a bearing part, a movable pulley block, a fixed pulley block and a traction part; the bearing piece is vertically arranged and is fixed with the top wall of the well; the motor driving part is arranged at the top of the well and used for driving the screw to perform circumferential rotation motion around the central axis of the screw; the screw is arranged right in front of the force bearing piece; the screw lifting block is sleeved on the screw rod, moves up and down along the screw rod and is provided with a through threaded hole matched with the screw rod; the movable pulley block is composed of a plurality of movable pulleys which are linearly arranged along the vertical direction; the movable pulley is detachably fixed on the left/right side wall of the spiral lifting block and performs synchronous displacement motion along with the spiral lifting block; the fixed pulley block is arranged right below the movable pulley block and is composed of a plurality of fixed pulleys which are arrayed along the up-down direction and are detachably fixed on the force bearing piece; the traction part is sequentially wound on the fixed pulley and the movable pulley, the fixed end of the traction part is fixed with the force bearing part, and the traction end of the traction part drags the lift car to perform displacement motion along the up-down direction.

2. The screw-driven home elevator according to claim 1, wherein the number of the stroke-increasing mechanisms is set to 2 and symmetrically arranged on the left and right sides of the spiral elevating block.

3. Screw-driven home elevator according to claim 2, wherein the number of the movable pulleys is 3 and the number of the fixed pulleys is 2 for the single-sided travel increasing mechanism.

4. The screw-driven home elevator according to claim 1, wherein the cage driving part further comprises an auxiliary support plate; the number of the auxiliary supporting plates is set to be 2, and the auxiliary supporting plates are symmetrically arranged on the left side and the right side of the force bearing piece; the two end parts of the auxiliary supporting plate are detachably connected with the bearing part and the well respectively by means of fasteners.

5. The screw-driven home elevator of claim 1, wherein the range-extending mechanism further comprises a rope-blocking lever assembly; the rope blocking rod assembly is composed of a plurality of rope blocking rods arranged around the periphery of the movable pulley and the fixed pulley.

6. Screw-driven home elevator according to claim 1, wherein the traction member is a steel belt.

7. Screw-driven home elevator according to any one of claims 1-5, wherein the range-extending mechanism further comprises a guide roller assembly; the guide roller assembly comprises a left guide roller and a right guide roller; the left guide roller and the right guide roller are respectively pivoted on the left side wall and the right side wall of the spiral lifting block and always lean against the bearing piece to freely roll.

8. The screw-driven home elevator according to claim 7, wherein the left guide roller is formed by embedding a left guide roller body and a left rubber rim sleeve; the right guide roller is formed by embedding a right guide roller body and a right rubber rim sleeve.

Images