Shallow-shaft large-door goods elevator without machine room

Abstract

The utility model discloses a shallow-shaft large-door goods elevator without a machine room. The goods elevator comprises a counterweight guide rail, a lift car, a door machine, a lift car bottom, a steel wire rope, a lift car top and a locking switch. The top of the counterweight guide rail is fixed to a hoistway wall through a traction machine storage rack and a chemical expansion bolt, a traction machine platform is laid above the traction machine storage rack, a traction machine is arranged on the traction machine platform, and a counterweight transition wheel assembly is arranged on the side, close to the counterweight guide rail, of the traction machine platform. According to the device, the counterweight wheel assemblies are symmetrically and vertically installed in the counterweight upper beam in parallel, the installation distance is compressed to be twice the diameter of the counterweight wheel + 300mm, the transverse size of the counterweight frame is remarkably reduced, the minimum depth of the lift car can reach 1200mm, the top height of an adaptive extra-shallow shaft is larger than or equal to 3800mm, meanwhile, the counterweight frame and the center line of the lift car are arranged in a coincident mode, unbalance loading of the lift frame is avoided, the civil engineering space of the shaft is saved, and the service life of the lift car is prolonged. The building cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of elevators, and in particular to a shallow shaft, large-door, machine-room-less freight elevator. Background Technology

[0002] The existing layouts of the top of machine-room-less freight elevator shafts mainly fall into two categories: One involves mounting the counterweight-side traction machine and transition wheels on two through-beams, with the car-side transition wheel assembly fixed via the top steel beams or shelves; the other involves directly fixing the counterweight-side traction machine and transition wheels to a platform on top of the guide rails, with the car-side transition wheels installed via shelves on top of the guide rails. Both designs employ a coaxial, straight arrangement of the counterweight wheels and counterweight upper beams, making it difficult to compress the lateral dimensions of the counterweight frame. This forces an increase in car depth to accommodate the shaft width, and the installation of steel beams or shelves on both sides of the shaft top raises the minimum height of the gantry crane's operating space. To meet the car door opening height requirement (e.g., 2100mm), the top floor height of the shaft needs to be ≥4200mm, significantly limiting its application in shallow shaft scenarios (top floor height ≤3500mm). Furthermore, the off-center loading problem caused by the misalignment of the counterweight frame and car centerline requires additional counterweight compensation, further increasing costs.

[0003] The aforementioned defects make conventional machine room-less freight elevators unsuitable for the needs of shallow shafts and large door opening distances in low-rise buildings, necessitating a solution with optimized spatial layout. Utility Model Content

[0004] The main purpose of this utility model is to provide a shallow shaft, large-door, machine-room-less freight elevator, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A shallow shaft, large-door, machine-room-less freight elevator includes a counterweight guide rail, a car, a door operator, a car bottom, wire ropes, a car top, and a locking switch;

[0007] The top of the counterweight guide rail is fixed to the shaft wall by chemical expansion bolts through the traction machine shelf. A traction machine platform is laid on the traction machine shelf, and a traction machine is installed on the traction machine platform. A counterweight transition wheel assembly is installed on the side of the traction machine platform near the counterweight guide rail. The counterweight transition wheel assembly is aligned with the traction wheel of the traction machine. A car-side transition steel beam is installed on the opposite side of the counterweight guide rail at the top of the shaft. A car-side transition steel beam is installed on the car-side transition steel beam and a speed limiter is installed on the car-side transition steel beam. The installation height of the car-side transition steel beam is lower than the highest running trajectory of the gantry crane.

[0008] A counterweight frame is installed inside the hoistway. The counterweight frame is a channel steel frame welded together from a counterweight upper beam, a counterweight straight beam, and a counterweight lower beam. Two sets of counterweight wheel assemblies are installed parallel, symmetrically, and vertically inside the counterweight upper beam of the counterweight frame. The installation spacing of the counterweight wheel assemblies is twice the counterweight wheel diameter + 300mm, so that the car depth is compressed to adapt to the ultra-shallow hoistway.

[0009] The centerline of the counterweight frame coincides with the centerline of the car, and the distance between the outer contour of the counterweight frame and the hoistway wall is ≤100mm, located within the space of the hoistway's large door opening distance;

[0010] The car floor is equipped with car floor wheel beam assemblies at both the front and rear ends, with the wheel assembly axis perpendicular to the car floor's direction of travel;

[0011] The wire rope winding path passes sequentially through the car bottom wheel beam assembly, the car transition wheel assembly, the traction sheave of the traction machine, the counterweight sheave assembly, and the counterweight transition wheel assembly, forming a symmetrical winding layout.

[0012] The gantry crane is located on the front side of the car top, and its drive arm running trajectory maintains a distance of ≥50mm from the traction machine platform and counterweight transition wheel assembly on the top of the shaft.

[0013] Preferably, it also includes a car frame disposed outside the car, namely the upper car beam, the straight car beam, and the lower car beam;

[0014] The car's straight beam is provided with screws on both sides, and the bottom of the car floor is provided with hooks. The screws pass through the hooks of the car floor and are locked with nuts.

[0015] A locking device is provided between the upper beam of the car and the straight beam of the car. The locking device includes: a guide rail fixing plate welded to both sides of the straight beam of the car, a shaft and a bushing inserted into the guide rail fixing plate, and a locking switch mounting seat fixed to the car frame by bolts.

[0016] When the shaft and the bushing are fully inserted into the guide rail fixing plate, the locking switch can cut off the control circuit.

[0017] Preferably, progressive safety clamps and push-down safety mechanisms are provided on both sides of the lower beam of the car.

[0018] Preferably, a landing door device is installed in the hoistway, and a sill assembly is installed on the landing door device. The sill assembly is fixed to the hoistway threshold by bolts. The door lock contact of the landing door device is connected in series with the drive signal of the car door operator to form an electrical interlock.

[0019] It also includes a car guide rail installed in the hoistway. The car guide rail and the counterweight guide rail are clamped and fixed by the pressure plate of the hoistway bracket. The hoistway bracket is connected to the wall by expansion bolts with a spacing of ≤1.5m.

[0020] Preferably, counterweight guide shoes are provided on both sides of the counterweight straight beam, the counterweight guide shoes clamp the counterweight guide rail with bolts, a counterweight oil cup is provided on the top of the counterweight guide shoe, the counterweight oil cup is fixed by a buckle, and a counterweight guardrail is provided at the bottom of the counterweight frame, the counterweight guardrail is fixed to the pit floor with expansion bolts, and the height is ≥1100mm.

[0021] Preferably, both ends of the wire rope are fixed to the traction machine platform by wire rope cone sleeves, and the wire rope cone sleeves are sealed by crimping or lead filling.

[0022] The steering angle of the car transition wheel assembly and the counterweight transition wheel assembly is ≤90°, and the wheel groove radius of the car transition wheel assembly and the counterweight transition wheel assembly is ≥5 times the diameter of the wire rope.

[0023] Preferably, induction switches are provided on both sides of the car roof, and the induction switches are fixed by bolts;

[0024] Limit switches are provided at the upper and lower ends of the car guide rail, and the limit switches are fixed by bolts.

[0025] The steel wire rope integrates a weighing sensor. The weighing sensor, induction switch, limit switch, and door operator are connected to the control cabinet through a shielded cable to form a circuit, and the distance between the cable and the power line is ≥300mm. Beneficial effects

[0026] Compared with the prior art, this utility model provides a shallow shaft, large-door, machine-room-less freight elevator, which has the following advantages:

[0027] By installing the counterweight roller assemblies symmetrically and vertically within the counterweight upper beam, and compressing the installation spacing to twice the counterweight roller diameter plus 300mm, the lateral dimensions of the counterweight frame are significantly reduced, allowing for a minimum car depth of 1200mm, suitable for ultra-shallow hoistways with a top floor height ≥3800mm. Simultaneously, the counterweight frame and car centerline are aligned, avoiding uneven loading of the car frame, saving hoistway civil engineering space, and reducing construction costs.

[0028] The low-position installation design of the transition steel beam on the side of the car is ≥50mm lower than the operating trajectory of the gantry crane, avoiding interference from the gantry crane hitting the top, maximizing the door opening distance of the car and making it equal to the net width of the car, meeting the loading and unloading needs of large-tonnage freight elevators with a load capacity of ≤3000kg, and is especially suitable for early factory renovations or hoistway space-constrained scenarios.

[0029] The counterweight guardrail is ≥1100mm high, which meets national standards and effectively protects against the risk of collision with the pit.

[0030] The counterweight frame directly utilizes the large door opening space of the hoistway, eliminating the need for additional offset or counterweight, thus simplifying civil engineering design and production drawings. The traction machine platform on the top of the hoistway and the transition steel beam on the side of the car are fixed with modular installation chemical expansion bolts, reducing on-site welding and material consumption, shortening the construction cycle, and optimizing the symmetrical winding path of the wire rope with a turning angle ≤90° and a wheel groove radius ≥5 times the rope diameter, extending the life of the wire rope and reducing maintenance costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the shaft top of this utility model;

[0033] Figure 3 This is a top view of the shaft top structure of this utility model;

[0034] Figure 4 This is a structural schematic diagram of the elevator car of this utility model;

[0035] Figure 5 This is a side view of the elevator car of this utility model;

[0036] Figure 6 This is a top view of the elevator car of this utility model;

[0037] Figure 7 This is a schematic diagram of the structure of the sedan chair frame of this utility model;

[0038] Figure 8 This is a side view structural diagram of the sedan frame of this utility model;

[0039] Figure 9 This is a structural schematic diagram of the counterweight frame of this utility model;

[0040] Figure 10 This is a top view of the counterweight frame of this utility model;

[0041] Figure 11 This is a schematic diagram of the locking device of this utility model;

[0042] Figure 12 This is a schematic diagram of the specific structure of the locking device of this utility model.

[0043] In the diagram: 1. Hoistway support; 2. Hoistway top; 3. Car; 4. Car frame; 5. Counterweight frame; 6. Locking device; 7. Limit switch; 8. Inductive switch; 9. Door operator; 10. Landing door device; 11. Car guide rail; 12. Counterweight guide rail; 13. Car side transition steel beam; 14. Car transition wheel assembly; 15. Main rail reinforcing plate; 16. Traction machine shelf; 17. Traction machine platform; 18. Wire rope; 19. Wire rope cone sleeve; 20. Speed ​​governor; 21. Counterweight transition wheel assembly; 22. Traction machine; 23. Car top; 24. Car wall; 25. Car bottom; 26. Sill assembly; 27. 28. Car guardrail; 29. ​​Car oil cup; 30. Car upper beam; 31. Car guide shoe; 32. Car straight beam; 33. Car lower beam; 34. Hook; 35. Screw; 36. Car bottom wheel beam assembly; 37. Safety clamp; 38. Safety mechanism; 39. Counterweight oil cup; 40. Counterweight guide shoe; 41. Counterweight upper beam; 42. Counterweight straight beam; 43. Counterweight wheel assembly; 44. Counterweight guardrail; 45. Counterweight counterweight; 46. Counterweight block; 47. Counterweight lower beam; 48. Locking switch; 49. Guide rail fixing plate; 50. Locking switch mounting base; 51. Shaft; 52. Shaft sleeve. Detailed Implementation

[0044] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0045] like Figure 1-12 As shown, a shallow shaft, large-door, machine-room-less freight elevator is implemented as follows:

[0046] I. Installation of the shaft top structure

[0047] The counterweight guide rail 12 and the traction machine shelf 16 are fixed on the counterweight side of the top 2 of the shaft. The top of the counterweight guide rail 12 is fixed to the traction machine shelf 16 by chemical expansion bolts. The traction machine shelf 16 is connected to the main rail reinforcement 15 by welding or bolting. The main rail reinforcement 15 is located on the back of the counterweight guide rail 12 to enhance the bending strength of the guide rail. The traction machine platform 17 and the traction machine 22 are installed. The traction machine platform 17 is laid on top of the traction machine shelf 16 and fixed by bolts.

[0048] The traction machine 22 is fixed to the traction machine platform 17 by bolts, and a channel steel vertical support is installed below it to the bottom of the shaft to ensure operational stability;

[0049] The counterweight transition wheel assembly 21 is installed on the side of the traction machine platform 17 near the counterweight guide rail 12, and is aligned with the traction wheel of the traction machine 22.

[0050] The car-side transition steel beam 13 is installed on the car side of the top of the hoistway 2 and is fixed by chemical expansion bolts.

[0051] A car transition wheel assembly 14 and a speed limiter 20 are installed on the car side transition steel beam 13. The height of the steel beam is ≥50mm lower than the highest running trajectory of the gantry crane 9 to prevent the gantry crane from hitting the top.

[0052] II. Assembly and Layout of Counterweight Frame 5

[0053] Two sets of counterweight roller assemblies 43 are installed in parallel and symmetrically within the counterweight upper beam 41, with a spacing of 2 times the counterweight roller diameter + 300mm, and are fixed by bearing seats and bolts.

[0054] The counterweight frame 5 is a channel steel frame welded from the counterweight upper beam 41, the counterweight straight beam 42, and the counterweight lower beam 47. Its centerline coincides with the centerline of the car 3, and the distance between its outer contour and the hoistway wall is ≤100mm to avoid eccentric loading.

[0055] Counterweight guide shoes 40 and guardrails 44 are installed on both sides of counterweight straight beam 42. Counterweight guide shoes 40 are installed and counterweight guide rails 12 are clamped by bolts. Counterweight oil cups 39 (fixed by buckles) are provided on the top of the guide shoes.

[0056] Counterweight guardrail 44 is installed at the bottom of counterweight frame 5 and fixed to the pit floor with expansion bolts, with a height ≥1100mm.

[0057] III. Installation of Car 3 and Car Frame 4

[0058] The bottom wheel beam assembly 36 and the door operator 9 are installed at the front and rear ends of the bottom 25 of the car 3. The bottom wheel beam assembly 36 is installed and fixed by bolts. The wheel axis is perpendicular to the direction of travel of the car.

[0059] A gantry crane 9 is installed on the front side of the car top 23 and fixed by bracket bolts. The drive arm maintains a distance of ≥50mm from the traction machine platform 17 and counterweight transition wheel assembly 21 on the top of the shaft.

[0060] The car frame 4 is linked with the locking device 6. The car frame 4 consists of the upper beam 30, the straight beam 32, and the lower beam 33. The straight beam 32 is provided with screws 35 on both sides, which pass through the hooks 34 of the car bottom 25 and are locked with nuts.

[0061] A locking device 6 is installed between the upper beam 30 and the straight beam 32 of the car. The guide rail fixing plate 49 is welded to both sides of the straight beam 32. When the shaft 51 and the bushing 52 are inserted into the guide rail fixing plate 49, the bushing 52 triggers the locking switch 48 to achieve mechanical-electric dual locking.

[0062] Safety system installation: Progressive safety clamps 37 and push-down safety mechanisms 38 are installed on both sides of the lower beam 33 of the car. The speed limiter 20 is mechanically linked to the safety clamps 37 via a wire rope. The wire rope path length is the hoistway height + 1m, and the response time is ≤0.5s.

[0063] IV. Installation of other components within the shaft

[0064] The landing door device 10 is fixed to the guide rail, and the sill assembly 26 of the landing door device 10 is fixed to the hoistway sill by bolts. The door lock contacts are connected in series with the drive signal of the car door operator 9 to form an electrical interlock.

[0065] The car guide rail 11 and the counterweight guide rail 12 are clamped and fixed by the pressure plate of the shaft bracket 1, and the bracket spacing is ≤1.5m.

[0066] The wire rope 18 is wound and fixed. Both ends of the wire rope 18 are fixed to the traction machine platform 17 through wire rope cone sleeves 19. The cone sleeves are sealed by crimping or lead filling. The winding path passes through the car bottom wheel beam assembly 36 → car transition wheel assembly 14 → traction wheel 22 → counterweight wheel assembly 43 → counterweight transition wheel assembly 21 in sequence. The turning angle is ≤90° and the wheel groove radius is ≥5 times the diameter of the wire rope.

[0067] Safety circuit configuration: leveling induction switches and brackets 8 are installed on both sides of the car top 23, and limit switches and brackets 7 are installed at the upper and lower ends of the car guide rail 11.

[0068] The steel wire rope 18 integrates a weighing sensor, which is connected to the control cabinet via a shielded cable along with the door operator 9, the induction switch 8, and the limit switch 7. The distance between the cable and the power line is ≥300mm.

[0069] Working principle

[0070] When the elevator is running, the wire rope 18 transmits traction force through a symmetrical winding path. The counterweight frame 5 and the center line of the car 3 coincide to avoid uneven loading. The door operator 9 drives the car door to open and close. Its trajectory does not interfere with the top component 2 of the shaft, ensuring that the door opening distance is maximized (equal to the car's net width). Locking device 6: During maintenance, inserting the shaft 51 and the bushing 52 triggers the locking switch 48 to cut off the circuit, achieving double locking. Progressive safety clamp 37: After the speed limiter 20 detects overspeed, it triggers the safety clamp 37 through the wire rope to gradually brake, stopping at a deceleration of ≤0.5g, protecting the guide rails 11 / 12 from damage. The weighing sensor monitors the load in real time. The leveling sensor switch 8 and the limit switch 7 ensure accurate stopping. The door interlocking system prevents operation when the door is not closed.

[0071] This solution optimizes the shaft top layout (compressing the counterweight wheel spacing to 2D+300mm), symmetrical rope winding design, and safety system linkage to achieve stable operation of large-door freight elevators (load capacity ≤3000kg) in shallow shaft (depth ≥1200mm) and low top floor (height ≥3800mm) scenarios, saving more than 30% of civil engineering costs and adapting to the needs of existing factory renovation.

[0072] It should be noted that this utility model is a shallow shaft, large-door, machine-room-less freight elevator.

[0073] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shallow shaft, large-opening, machine-room-less freight elevator, comprising a counterweight guide rail (12), a car (3), a door operator (9), a car bottom (25), a wire rope (18), a car top (23), and a locking switch (48). Its features are: The top of the counterweight guide rail (12) is fixed to the shaft wall by chemical expansion bolts through the traction machine shelf (16). A traction machine platform (17) is laid on the traction machine shelf (16). A traction machine (22) is installed on the traction machine platform (17). A counterweight transition wheel assembly (21) is installed on the side of the traction machine platform (17) close to the counterweight guide rail (12). The counterweight transition wheel assembly (21) is aligned with the traction wheel of the traction machine (22). A car-side transition steel beam (13) is installed on the opposite side of the counterweight guide rail (12) at the top of the shaft (2). A car-side transition steel beam (14) and a speed limiter (20) are installed on the car-side transition steel beam (13). The installation height of the car-side transition steel beam (13) is lower than the highest running trajectory of the gantry crane (9). A counterweight frame (5) is installed inside the hoistway. The counterweight frame (5) is a channel steel frame welded together from the counterweight upper beam (41), the counterweight straight beam (42), and the counterweight lower beam (47). Two sets of counterweight wheel assemblies (43) are installed in parallel, symmetrically, and vertically inside the counterweight upper beam (41) of the counterweight frame (5). The installation spacing of the counterweight wheel assemblies (43) is 2 times the diameter of the counterweight wheel + 300mm, so that the depth of the car (3) is compressed to fit the ultra-shallow hoistway. The centerline of the counterweight frame (5) coincides with the centerline of the car (3), and the distance between the outer contour of the counterweight frame (5) and the hoistway wall is ≤100mm, located within the space of the large door opening distance of the hoistway; The car (3) has car bottom wheel beam assemblies (36) at both ends of the car bottom (25), and the wheel assembly axis is perpendicular to the direction of travel of the car (3); The wire rope (18) winds through the car bottom wheel beam assembly (36), the car transition wheel assembly (14), the traction wheel of the traction machine (22), the counterweight wheel assembly (43), and the counterweight transition wheel assembly (21) in sequence, forming a symmetrical winding layout; The gantry crane (9) is located on the front side of the car top (23), and its drive arm running trajectory maintains a distance of ≥50mm from the traction machine platform (17) and counterweight transition wheel assembly (21) of the shaft top (2).

2. The shallow shaft, large-door, machine-room-less freight elevator according to claim 1, characterized in that: It also includes a car frame (4) installed outside the car (3), a car upper beam (30), a car straight beam (32) and a car lower beam (33); The car straight beam (32) is provided with screws (35) on both sides, and the bottom of the car bottom (25) is provided with hooks (34). The screws (35) pass through the hooks (34) of the car bottom (25) and are locked with nuts. A locking device (6) is provided between the upper beam (30) of the car and the straight beam (32) of the car. The locking device (6) includes: a guide rail fixing plate (49) welded to both sides of the straight beam (32), a shaft (51) and a bushing (52) inserted into the guide rail fixing plate (49), and a locking switch mounting seat (50) fixed to the car frame (4) by bolts. When the shaft (51) and the bushing (52) are fully inserted into the guide rail fixing plate (49), the locking switch (48) can cut off the control circuit.

3. A shallow shaft, large-door, machine-room-less freight elevator according to claim 2, characterized in that: The car lower beam (33) is equipped with progressive safety clamps (37) and push-down safety mechanisms (38) on both sides.

4. A shallow shaft, large-door, machine-room-less freight elevator according to claim 3, characterized in that: A landing door device (10) is installed in the hoistway, and a sill assembly (26) is installed on the landing door device (10). The sill assembly (26) is fixed to the hoistway threshold by bolts. The door lock contact of the landing door device (10) is connected in series with the drive signal of the car door operator (9) to form an electrical interlock. It also includes a car guide rail (11) installed in the hoistway. The car guide rail (11) and the counterweight guide rail (12) are clamped and fixed by the pressure guide plate of the hoistway bracket (1). The hoistway bracket (1) is connected to the wall by expansion bolts with a spacing of ≤1.5m.

5. A shallow shaft, large-door, machine-room-less freight elevator according to claim 4, characterized in that: The counterweight straight beam (42) is provided with counterweight guide shoes (40) on both sides. The counterweight guide shoes (40) clamp the counterweight guide rail (12) by bolts. The top of the counterweight guide shoes (40) is provided with a counterweight oil cup (39). The counterweight oil cup (39) is fixed by buckles. The bottom of the counterweight frame (5) is provided with a counterweight guardrail (44). The counterweight guardrail (44) is fixed to the pit floor by expansion bolts, with a height ≥1100mm.

6. A shallow shaft, large-door, machine-room-less freight elevator according to claim 5, characterized in that: The two ends of the wire rope (18) are fixed to the traction machine platform (17) by wire rope cone sleeves (19), and the wire rope cone sleeves (19) are sealed by crimping or lead filling. The steering angle of the car transition wheel assembly (14) and the counterweight transition wheel assembly (21) is ≤90°, and the wheel groove radius of the car transition wheel assembly (14) and the counterweight transition wheel assembly (21) is ≥5 times the diameter of the wire rope (18).

7. A shallow shaft, large-door, machine-room-less freight elevator according to claim 6, characterized in that: The car roof (23) is provided with induction switches (8) on both sides, and the induction switches (8) are fixed by bolts; Limit switches (7) are provided at the upper and lower ends of the car guide rail (11), and the limit switches (7) are fixed by bolts; The wire rope (18) integrates a weighing sensor. The weighing sensor, the induction switch (8), the limit switch (7) and the door machine (9) are connected to the control cabinet through a shielded cable to form a circuit, and the distance between the cable and the power line is ≥300mm.

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