Rear counterweight goods elevator with machine room

Abstract

The invention discloses a rear counterweight goods elevator with a machine room, which relates to the technical field of goods elevators and comprises a machine room, a shaft, a car component, a counterweight component and a steel wire rope. The lift car assembly comprises a lift car body, a lift car upper beam assembly, a first car top wheel, a second car top wheel and a car frame, and the counterweight assembly is arranged on the rear side of a shaft and comprises a counterweight body, a counterweight upper beam assembly, a first counterweight wheel and a second counterweight wheel. A main bearing beam, a car bearing beam, a counterweight bearing beam, a motor, a first car guide wheel, a second car guide wheel, a third car guide wheel, a reverse guide wheel and a counterweight guide wheel are arranged in the machine room; the steel wire rope sequentially winds around the first car top wheel, the first car guide wheel, the second car top wheel, a motor traction wheel arranged in the motor, the reverse guide wheel, the second car guide wheel, the third car guide wheel, the first counterweight wheel, the counterweight guide wheel and the second counterweight wheel. According to the invention, the problems of insufficient width of the lift car, unbalance loading of the lift car and slipping of the steel wire rope can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of freight elevators, and in particular to a rear counterweight machine-room freight elevator. Background Art

[0002] At present, the counterweights of most machine-room freight elevators are installed on the left and right sides of the car. However, when the counterweight is designed on the side, the width of the car will become smaller, and it cannot meet the usage requirements when the width of the goods is large.

[0003] With the improvement of the prior art, the prior art has disclosed a rear counterweight machine-room freight elevator. For example, in Chinese Patent Application CN206126580U, the utility model named "a rear counterweight machine-room freight elevator" mentions that the top of the existing machine-room freight elevator car adopts a cross upper beam structure. This structure uses a cantilever beam at the lower layer to support the upper beam at the upper layer, and the cantilever beam and the upper beam are fixed by screws. However, the contact area between the two sets of upper beams in this patent is small, resulting in a small stress surface. In actual application, when the cantilever beam is designed to be very long, the car depth is large, and when the load and the goods are heavy, the car may have the risk of front and rear uneven loading, which easily leads to the phenomenon of unstable operation of the freight elevator and reduces the service performance of the freight elevator.

[0004] In addition, in the existing machine-room rope winding method, usually only one guide pulley is used for steering between the motor and the counterweight. This will cause the phenomenon of easy slipping between the steel wire rope and the guide pulley, and it is easy to slip when the freight elevator is overloaded or running at high speed, affecting the stability and safety of the freight elevator operation.

[0005] Therefore, it is urgent to design a rear counterweight machine-room freight elevator to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a rear counterweight machine-room freight elevator, which can solve the problems in the prior art that the goods with too large width cannot be put into the car, the car is prone to uneven loading when the car depth is large and the goods are heavy, and the existing rope winding method is prone to slipping when the freight elevator is overloaded or running at high speed.

[0007] To solve the above technical problems, the present invention provides a rear counterweight machine room freight elevator, which includes a machine room, a hoistway, a car assembly, a counterweight assembly and steel wire ropes; the car assembly is arranged on the front side of the hoistway, and the car assembly includes a car body, a car upper beam assembly, a first car top wheel, a second car top wheel and a car frame. The car upper beam assembly is arranged on the top of the car body, the first car top wheel and the second car top wheel are arranged on the car upper beam assembly, and the car frame is arranged at the bottom ends of both sides of the car upper beam assembly. The car frame is used to support and fix the car body; the counterweight assembly is arranged on the rear side of the hoistway, and the counterweight assembly includes a counterweight body, a counterweight upper beam assembly, a first counterweight wheel and a second counterweight wheel. The counterweight upper beam assembly is arranged on the top of the counterweight body, and the first counterweight wheel and the second counterweight wheel are arranged on the counterweight upper beam assembly; a main bearing beam, a car bearing beam, a counterweight bearing beam, a motor, a first car guide wheel, a second car guide wheel, a third car guide wheel, a reverse guide wheel and a counterweight guide wheel are arranged in the machine room; the motor, the reverse guide wheel, the second car guide wheel and the third car guide wheel are all arranged on the main bearing beam, the first car guide wheel is arranged on the car bearing beam, and the counterweight guide wheel is arranged on the counterweight bearing beam; the steel wire ropes sequentially pass around the first car top wheel, the first car guide wheel, the second car top wheel, a motor traction wheel arranged in the motor, the reverse guide wheel, the second car guide wheel, the third car guide wheel, the first counterweight wheel, the counterweight guide wheel and the second counterweight wheel; the installation height of the reverse guide wheel is lower than that of the second car guide wheel and the motor traction wheel, so that the wrap angle of the motor traction wheel can reach a preset angle.

[0008] As an improvement of the above solution, paired shock-absorbing rubbers are arranged at the bottom of the main bearing beam on both sides of the center of the reverse guide wheel, and one side of the shock-absorbing rubber is attached to the bottom of the main bearing beam.

[0009] As an improvement of the above solution, a shock-absorbing rubber backing plate is arranged at the bottom of the shock-absorbing rubber, and the shock-absorbing rubber is fixed to the bottom of the main bearing beam through a fixing member.

[0010] As an improvement of the above solution, both ends of the main bearing beam are embedded in the walls on the front and rear sides of the machine room. The main bearing beam includes a first main bearing beam and a second main bearing beam arranged in parallel with each other. The motor is placed in the middle of the top end of the first main bearing beam, and the reverse guide wheel, the second car guide wheel and the third car guide wheel are all arranged between the first main bearing beam and the second main bearing beam.

[0011] As an improvement of the above solution, the car load-bearing beam includes a first car load-bearing beam and a second car load-bearing beam which are arranged in parallel with each other. The first car load-bearing beam and the second car load-bearing beam are connected by at least one connecting plate. One end of the first car load-bearing beam is embedded in the wall on one side of the machine room, and the other end is connected to the second main load-bearing beam. One end of the second car load-bearing beam is embedded in the wall on one side of the machine room, and the other end is connected to the second main load-bearing beam. The first car guide wheel is arranged between the first car load-bearing beam and the second car load-bearing beam, and a speed limiter is arranged on the top of the second car load-bearing beam.

[0012] As an improvement of the above solution, the counterweight load-bearing beam includes a first counterweight load-bearing beam and a second counterweight load-bearing beam which are arranged in parallel with each other. The first counterweight load-bearing beam and the second counterweight load-bearing beam are connected by at least one connecting plate. One end of the first counterweight load-bearing beam is embedded in the wall on one side of the machine room, and the other end is connected to the second main load-bearing beam. One end of the second counterweight load-bearing beam is embedded in the wall on one side of the machine room, and the other end is connected to the second main load-bearing beam. The counterweight guide wheel is arranged between the first counterweight load-bearing beam and the second counterweight load-bearing beam.

[0013] As an improvement of the above solution, paired car guide shoes are provided at the tops of both ends of the car upper beam assembly, paired counterweight guide shoes are provided at both ends of the counterweight upper beam assembly, and an oil cup is provided at the top of the counterweight guide shoes.

[0014] As an improvement of the above solution, paired car guide rails are provided on the inner wall of the hoistway, and the car guide shoes are slidably connected to the car guide rails.

[0015] As an improvement of the above solution, paired counterweight guide rails are provided on the inner wall of the hoistway, and the counterweight guide shoes are slidably connected to the counterweight guide rails.

[0016] The beneficial effects of implementing the present invention are as follows:

[0017] In the present invention, by arranging the counterweight at the rear side of the hoistway, a car with a larger width can be designed within a hoistway of the same width to meet the use requirements of wider goods. By installing the car upper beam assembly on the top of the car and connecting the two ends of the car upper beam assembly to the car frame, the problem of uneven load of the car when the car has a large depth and heavy cargo weight is avoided. Additionally, by using a new rope winding method in the machine room and adding a reverse guide wheel in the machine room, the friction force between the steel wire rope between the second car guide wheel and the motor traction wheel is increased. Since the reverse guide wheel is arranged below the motor traction wheel, the reverse guide wheel also indirectly enhances the friction force between the steel wire rope and the motor traction wheel, increasing the traction force and avoiding the phenomenon of the steel wire rope slipping when the car is heavily loaded or running at high speed. Description of the Drawings

[0018] Figure 1It is the floor plan structure diagram of the machine room of the counterweight organic machine room freight elevator after the present invention;

[0019] Figure 2 It is the shaft plan structure diagram of the counterweight organic machine room freight elevator after the present invention;

[0020] Figure 3 It is the schematic diagram of the rope winding method of the counterweight organic machine room freight elevator after the present invention;

[0021] Figure 4 It is the schematic diagram of the shock-absorbing rubber structure of the counterweight organic machine room freight elevator after the present invention. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the orientation terms such as up, down, left, right, front, back, inside and outside that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and they do not specifically limit the present invention.

[0023] See Figure 1 、 Figure 2 and Figure 3, a rear counterweight machine room freight elevator of the present invention includes a machine room 1, a hoistway 2, a car assembly 3, a counterweight assembly 4 and a steel wire rope 5; the car assembly 3 is arranged on the front side of the hoistway 2, and the car assembly 3 includes a car body 30, a car upper beam assembly 31, a first car top wheel 311, a second car top wheel 312 and a car frame 313. The car upper beam assembly 31 is arranged on the top of the car body 30, the first car top wheel 311 and the second car top wheel 312 are arranged on the car upper beam assembly 31, and the car frame 313 is arranged at the bottom ends of both sides of the car upper beam assembly 31. The car frame 313 is used to support and fix the car body 30; the counterweight assembly 4 is arranged on the rear side of the hoistway 2, and the counterweight assembly 4 includes a counterweight body 40, a counterweight upper beam assembly 411, a first counterweight wheel 411 and a second counterweight wheel 412. The counterweight upper beam assembly 411 is arranged on the top of the counterweight body 30, and the first counterweight wheel 411 and the second counterweight wheel 412 are arranged on the counterweight upper beam assembly 411; in the machine room 1, there are a main load-bearing beam 11, a car load-bearing beam 12, a counterweight load-bearing beam 13, a motor 14, a first car guide wheel 15, a second car guide wheel 16, a third car guide wheel 17, a reverse guide wheel 18 and a counterweight guide wheel 19; the motor 14, the reverse guide wheel 18, the second car guide wheel 16 and the third car guide wheel 17 are all arranged on the main load-bearing beam 11, the first car guide wheel 15 is arranged on the car load-bearing beam 12, and the counterweight guide wheel 19 is arranged on the counterweight load-bearing beam 13; the steel wire rope 5 sequentially winds around the first car top wheel 311, the first car guide wheel 15, the second car top wheel 312, a motor traction wheel 141 arranged in the motor 14, the reverse guide wheel 18, the second car guide wheel 16, the third car guide wheel 17, the first counterweight wheel 411, the counterweight guide wheel 19 and the second counterweight wheel 412; the installation height of the reverse guide wheel 18 is lower than that of the second car guide wheel 16 and the motor traction wheel 141, so that the wrap angle of the motor traction wheel 141 can reach a preset angle.

[0024] It should be noted that by designing the car 3 on the front side of the hoistway 2 and the counterweight 4 on the rear side of the hoistway 2, a larger width of the car 3 can be designed under the same width of the hoistway 2 to meet the use requirements of goods with a larger width. A car upper beam assembly 31 is arranged on the top of the car 3. By designing the first car top wheel 311 and the second car top wheel 312 on the car upper beam assembly 31, the situation of uneven load of the car 3 when the depth of the car 3 is large and the weight of the goods is heavy is avoided. Also, by using a new rope winding method, a reverse guide wheel 18 that is mapped or intersects with the second car guide wheel 16 in the vertical direction is added, and the steel wire rope 5 is wound around the reverse guide wheel 18, so that the friction force between the steel wire rope 5 and the motor traction wheel 141 is increased, the traction force is increased accordingly, and the phenomenon of slipping of the steel wire rope 5 when the car 3 is overloaded or running at high speed is avoided. In this embodiment, the angle of the wrap angle of the motor traction wheel 141 is preferably 180°.

[0025] See Figure 4, on both sides of the center of the anti-guide wheel 18, pairs of shock-absorbing rubbers 113 are provided at the bottom of the main load-bearing beams 11. One side of the shock-absorbing rubber 113 is attached to the bottom of the main load-bearing beam 11. Since the distances between the motor traction wheel 141, the second car guide wheel 16 and the anti-guide wheel 18 are relatively close, the shock-absorbing rubber 113 can, to a certain extent, relieve the mutual forces among the three, reduce resonance and extend the service life of the components.

[0026] Furthermore, a shock-absorbing rubber backing plate 114 is provided at the bottom of the shock-absorbing rubber 113. The shock-absorbing rubber backing plate 114 fixes the shock-absorbing rubber 113 to the bottom of the main load-bearing beam 11 through fixing parts. By designing the shock-absorbing rubber backing plate 114, the shock-absorbing rubber 113 can be better attached to the bottom of the main load-bearing beam 11, enabling it to fully exert its shock-absorbing effect.

[0027] See Figure 1 , both ends of the main load-bearing beam 11 are embedded in the walls on the front and back sides of the machine room 1. The main load-bearing beam 11 includes a first main load-bearing beam 111 and a second main load-bearing beam 112 arranged in parallel. The motor 14 is placed in the middle of the top end of the first main load-bearing beam 111. The anti-guide wheel 18, the second car guide wheel 16 and the third car guide wheel 17 are all arranged between the first main load-bearing beam 111 and the second main load-bearing beam 112. By embedding the main load-bearing beam 11 in the wall, it can effectively resist the vibration and impact load generated during the operation of the motor 14. By designing the second car guide wheel 16 and the third car guide wheel 17, the direction of the steel wire rope 5 can be adjusted. Also, by designing the main load-bearing beam 11 as a double-beam structure, the lateral tension from each guide wheel can be resisted.

[0028] Specifically, the car load-bearing beam 12 includes a first car load-bearing beam 121 and a second car load-bearing beam 122 arranged in parallel. The first car load-bearing beam 121 and the second car load-bearing beam 122 are connected by at least one connecting plate 115; one end of the first car load-bearing beam 121 is embedded in the wall on one side of the machine room 1, and the other end is connected to the second main load-bearing beam 112; one end of the second car load-bearing beam 122 is embedded in the wall on one side of the machine room 1, and the other end is connected to the second main load-bearing beam 112; the first car guide wheel 15 is arranged between the first car load-bearing beam 121 and the second car load-bearing beam 122, and a speed limiter 123 is provided at the top of the second car load-bearing beam 122. By providing the first car load-bearing beam 121 and the second car load-bearing beam 122, the lateral tension from the first car guide wheel 15 can be resisted, enabling the car 3 to run smoothly.

[0029] It should be noted that the first car guide wheel 15 is used to adjust the direction of a section of the steel wire rope 5 connecting the first car top wheel 311 and the second car top wheel 312. In addition, a speed limiter 123 is also designed to trigger the safety clamp when the freight elevator is overspeed or falling, forcing the freight elevator to stop running.

[0030] Specifically, the counterweight main beam 13 includes a first pair of counterweight main beams 131 and a second pair of counterweight main beams 132 arranged in parallel. At least one connecting plate 115 is used to connect the first pair of counterweight main beams 131 and the second pair of counterweight main beams 132. One end of the first pair of counterweight main beams 131 is embedded in the wall on one side of the machine room 1, and the other end is connected to the second main load-bearing beam 112. One end of the second pair of counterweight main beams 132 is embedded in the wall on one side of the machine room 1, and the other end is connected to the second main load-bearing beam 112. The counterweight guide wheel 19 is arranged between the first pair of counterweight main beams 131 and the second pair of counterweight main beams 132. By arranging the first pair of counterweight main beams 131 and the second pair of counterweight main beams 132, the lateral tension from the counterweight guide wheel 19 can be resisted, so that the counterweight 4 can run smoothly. The counterweight guide wheel 19 is used to adjust the direction of a section of the steel wire rope 5 connecting the first pair of counterweight wheels 411 and the second pair of counterweight wheels 412.

[0031] Preferably, paired car guide shoes 314 are provided at the tops of both ends of the car upper beam assembly 31. Paired counterweight guide shoes 413 are provided at both ends of the counterweight upper beam assembly 411. An oil cup 414 is provided at the top of the counterweight guide shoe 413. The car guide shoes 314 can enable a stable sliding connection between the car 3 and the car guide rail 21, ensuring the stability of the car 3 during operation. The oil cup 414 is used to load guide rail oil, and a small amount of guide rail oil seeps out when the counterweight guide shoe 413 runs on the counterweight guide rail 22, so that the counterweight 4 can run smoothly and avoid jamming.

[0032] Preferably, paired car guide rails 21 are provided on the inner wall of the hoistway 2. The car guide shoes 314 are slidably connected to the car guide rails 21. The car guide rails 21 are used to guide the car 3, ensuring that the car 3 can smoothly lift and lower along a predetermined path.

[0033] Preferably, paired counterweight guide rails 22 are provided on the inner wall of the hoistway 2. The counterweight guide shoes 413 are slidably connected to the counterweight guide rails 22. The counterweight guide rails 22 are used to guide the counterweight 4, ensuring that the counterweight 4 can smoothly lift and lower along a predetermined path.

[0034] As can be seen from the above, in the present invention, by arranging the counterweight 4 at the rear side of the hoistway 2, a hoistway 2 with the same width can be designed to have a larger-width car 3 to meet the usage requirements of wider goods. By installing the car upper beam assembly 31 on the top of the car 3 and connecting both ends of the car upper beam assembly 31 to the car frame 313, the phenomenon of uneven loading of the car 3 when the depth of the car 3 is large and the weight of the goods is heavy is avoided. By using a new rope winding method, the mapping of the second car guide pulley 16 in the vertical direction is connected to the anti-guide pulley 18, so that the traction wrap angle can reach 180° or more, enhancing the friction between the steel wire rope 5 and the motor traction sheave 141 and avoiding the phenomenon of slipping of the steel wire rope 5 when the car 3 is heavily loaded or running at high speed. By arranging shock-absorbing rubber 113 at the bottom of the main load-bearing beam 11 on both sides of the center of the anti-guide pulley 18, the resonance between components is reduced to extend the service life of the components, and a shock-absorbing rubber backing plate 114 is designed to ensure that the shock-absorbing rubber 113 can fully play its shock-absorbing role. All load-bearing beams are embedded in the wall of the machine room 1 to enable them to maintain sufficient stability to ensure the normal operation of each guide pulley.

[0035] In addition, by designing the car guide shoes 314 and the counterweight guide shoes 413, the car 3 and the counterweight 4 can respectively run along various car guide rails 21 to ensure the stability of the freight elevator during operation. Also, by designing the oil cup 414 on the top of the counterweight guide shoe 413, the track oil can seep out to the counterweight guide rail 22 to ensure the smoothness of the counterweight 4 during operation.

[0036] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A rear counterweight machine room freight elevator, characterized in that, It includes a machine room, a hoistway, a car assembly, a counterweight assembly and wire ropes; The car assembly is arranged on the front side of the hoistway. The car assembly includes a car body, a car upper beam assembly, a first car top wheel, a second car top wheel and a car frame. The car upper beam assembly is arranged on the top of the car body. The first car top wheel and the second car top wheel are arranged on the car upper beam assembly. The car frame is arranged at the bottoms of both ends of the car upper beam assembly. The car frame is used to support and fix the car body; The counterweight assembly is arranged on the rear side of the hoistway. The counterweight assembly includes a counterweight body, a counterweight upper beam assembly, a first counterweight wheel and a second counterweight wheel. The counterweight upper beam assembly is arranged on the top of the counterweight body. The first counterweight wheel and the second counterweight wheel are arranged on the counterweight upper beam assembly; The machine room is provided with a main bearing beam, a car bearing beam, a counterweight bearing beam, a motor, a first car guide wheel, a second car guide wheel, a third car guide wheel, a reverse guide wheel and a counterweight guide wheel; The motor, the reverse guide wheel, the second car guide wheel and the third car guide wheel are all arranged on the main bearing beam. The first car guide wheel is arranged on the car bearing beam. The counterweight guide wheel is arranged on the counterweight bearing beam; The wire ropes sequentially pass around the first car top wheel, the first car guide wheel, the second car top wheel, a motor traction wheel arranged in the motor, the reverse guide wheel, the second car guide wheel, the third car guide wheel, the first counterweight wheel, the counterweight guide wheel and the second counterweight wheel; The installation height of the reverse guide wheel is lower than that of the second car guide wheel and the motor traction wheel, so that the wrap angle of the motor traction wheel can reach a preset angle.

2. The post-opposed machine room freight elevator according to claim 1, characterized in that, On both sides of the bottom of the main bearing beam at the two sides of the center of the reverse guide wheel, paired shock-absorbing rubbers are provided, and one side of the shock-absorbing rubber is attached to the bottom of the main bearing beam.

3. The rear counterweight machine-room freight elevator according to claim 2, wherein A shock-absorbing rubber backing plate is arranged at the bottom of the shock-absorbing rubber. The shock-absorbing rubber backing plate fixes the shock-absorbing rubber to the bottom of the main bearing beam through a fixing piece.

4. A rear counterweight machine-room freight elevator according to claim 1, characterized in that, Both ends of the main bearing beam are embedded in the walls on the front and rear sides of the machine room. The main bearing beam includes a first main bearing beam and a second main bearing beam which are arranged in parallel. The motor is placed in the middle of the top end of the first main bearing beam. The reverse guide wheel, the second car guide wheel and the third car guide wheel are all arranged between the first main bearing beam and the second main bearing beam.

5. A rear counterweight machine-roomed goods lift according to claim 1, characterized in that, The car bearing beam includes a first car bearing beam and a second car bearing beam which are arranged in parallel. The first car bearing beam and the second car bearing beam are connected by at least one connecting plate; One end of the first car bearing beam is embedded in the wall on one side of the machine room, and the other end is connected to the second main bearing beam; One end of the second car bearing beam is embedded in the wall on one side of the machine room, and the other end is connected to the second main bearing beam; The first car guide wheel is arranged between the first car bearing beam and the second car bearing beam, and a speed limiter is arranged on the top of the second car bearing beam.

6. A rear counterweight machine-roomed freight elevator according to claim 1, characterized in that, The counterweight bearing beam includes a first counterweight bearing beam and a second counterweight bearing beam which are arranged in parallel. The first counterweight bearing beam and the second counterweight bearing beam are connected by at least one connecting plate; One end of the first counterweight bearing beam is embedded in the wall on one side of the machine room, and the other end is connected to the second main bearing beam; One end of the second counterweight load-bearing beam is embedded in the wall on one side of the machine room, and the other end is connected to the second main load-bearing beam; The counterweight guide wheel is arranged between the first counterweight load-bearing beam and the second counterweight load-bearing beam.

7. A rear counterweight machine room freight elevator according to claim 1, characterized in that, At the top of both ends of the car upper beam assembly, paired car guide shoes are provided. At both ends of the counterweight upper beam assembly, paired counterweight guide shoes are provided, and an oil cup is provided at the top of the counterweight guide shoes.

8. A rear counterweight machine room freight elevator according to claim 7, characterized in that, Paired car guide rails are provided on the inner wall of the hoistway, and the car guide shoes are slidably connected to the car guide rails.

9. A rear counterweight machine room freight elevator according to claim 7, characterized in that, Paired counterweight guide rails are provided on the inner wall of the hoistway, and the counterweight guide shoes are slidably connected to the counterweight guide rails.

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