Elevator car structure

Abstract

The invention discloses an elevator car structure, which relates to the technical field of elevators, and comprises a box body, a bracket, two rails, a stroke limiting unit, a stable redirection unit and a hydraulic driving unit, and the two rails are vertically distributed on the bracket in parallel. The stroke limiting unit comprises a mounting base connected with the box body, a guide frame is arranged on the mounting base, and the guide frame and the track are connected in an abutting and embedded mode through a rolling wheel in a sliding mode; the travel limiting unit comprises a pulley yoke arranged on the track, and pulley blocks matched with the lifting track are arranged at the two ends of the pulley yoke; and the hydraulic driving unit drives the pulley yoke to move up and down along the track. The hydraulic cylinder and the driving part of the pulley yoke are decoupled from the box body, namely the bearing part, in a mechanical mode, the advantages of stability and large load of hydraulic driving are utilized, the stability and safety of operation of the box body are guaranteed through the pulley and the traction belt mechanism, and the device is completely adaptive to the use scene of a home elevator.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators. Background Art

[0002] In recent years, research in the field of home elevators has continued to deepen. Emerging market demand for home elevators has brought new business growth to many domestic elevator manufacturers. However, because home elevators are not currently included in the special equipment safety supervision system for effective oversight, the quality of manufacturing and service among home elevator manufacturers, distributors, and service providers varies widely, urgently requiring standardization. As personal belongings in modern families, home elevators require customization, primarily in areas such as the interior of the car, lighting, auxiliary features (seats and handrails), control keys, and voice call systems. The selection and configuration of a home elevator directly impacts daily convenience, passenger safety, and ride comfort. When selecting a model, consider multiple factors, including the drive mode, spatial layout, door opening method (side-opening or center-opening), and safety features. The specific needs of family members must also be considered to ensure convenient use for all.

[0003] Examples demonstrate that the sustained growth in market demand has created new development opportunities for elevator manufacturing, installation and commissioning, and maintenance services. This has accelerated the pace of technological updates and diversified product lines. The resulting increase in employment has been proven, and the resulting economic benefits are significant.

[0004] Optimizing the safety performance of home elevators has positive implications for public safety. Technical research focused on performance indicators such as equipment reliability and the development of scientific and effective safety protection plans can significantly improve equipment stability and effectively protect the safety of users and their property. However, existing home elevators often suffer from complex structures, difficult operation and maintenance, and low safety standards. Summary of the Invention

[0005] The purpose of the present invention is to provide an elevator car structure in order to solve the above technical problems.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: An elevator car structure, comprising a box body, a bracket, a track, a travel limit unit, a stable redirection unit, and a hydraulic drive unit, wherein the track is provided with two parallel vertically distributed on the bracket; The travel limiting unit includes a mounting base connected to the box body, a guide frame is provided on the mounting base, and the guide frame is in sliding engagement with the track via rollers; The travel limiting unit includes a pulley frame arranged on the track, and pulley groups cooperating with the lifting track are provided at both ends of the pulley frame; The stable redirecting unit includes a redirecting wheel provided on the pulley frame, and a traction belt is provided on the guide frame, which passes upward around the redirecting wheel and is fixed on the bracket; The hydraulic drive unit drives the pulley frame to move up and down along the track. Through the above solution, a hydraulic drive unit is used as the main power source to directly drive an independent pulley frame to move up and down along two parallel vertical tracks fixed to the bracket. The box is slidably connected to the track through the travel limit unit, i.e. the mounting base and the guide frame, and is linked to the pulley frame and the bracket through the stable redirection unit, i.e. the traction belt and the redirecting wheel. The hydraulic cylinder pushes the pulley frame to move, and the redirecting wheel on the pulley frame moves accordingly, thereby changing the path of the traction belt, and finally driving the box to rise and fall at a fixed rope winding ratio through the guide frame. The driving part of the hydraulic cylinder and the pulley frame is mechanically decoupled from the box, i.e. the load-bearing part, which not only takes advantage of the smoothness and large load of the hydraulic drive, but also ensures the stability and safety of the box operation through the pulley and traction belt mechanism, which is fully adapted to the use scenario of home elevators.

[0007] Furthermore, the hydraulic drive unit includes a hydraulic cylinder assembly disposed in the bracket, the hydraulic cylinder assembly includes a fluid supply mechanism, and the output shaft of the hydraulic cylinder assembly is fixed to the pulley frame. With this solution, the hydraulic cylinder assembly is built into the bracket, and its output shaft is directly and securely connected to the pulley frame. Hydraulic pressure acts directly on the pulley frame, resulting in a compact structure that conceals the power source within the bracket, saving space and creating an aesthetically pleasing design. The short drive chain provides high efficiency and minimizes energy loss. Direct thrust delivers substantial starting and operating force, making it suitable for heavy-load applications.

[0008] Furthermore, the liquid supply mechanism includes an oil tank, a filter, an oil pump, a relief valve, a one-way valve, a three-position four-way reversing solenoid valve, a throttle valve, and an oil cylinder connected by pipelines. The oil cylinder is provided with an output shaft. The oil pump transports oil from the oil tank to the oil cylinder. The oil cylinder is used to drive the extension, retention and retraction of the output shaft. The relief valve is provided at the output end of the oil pump and the end of the valve is connected to an emergency storage tank. A pressure gauge is provided at the output end of the oil pump. The above solution ensures clean hydraulic oil is supplied by the oil tank, filter, and oil pump. The overflow valve, a key safety valve, relieves pressure in the event of system overpressure, protecting piping and components. The relief oil is discharged into an emergency storage tank rather than the tank, preventing oil temperature rise. A check valve prevents oil backflow. A three-position, four-way solenoid valve controls oil flow, precisely controlling the cylinder's extension, retention, and retraction states. The throttle valve regulates oil flow and cylinder speed, ensuring smooth car startup and shutdown. A pressure gauge monitors system pressure in real time. This completes a comprehensive, precisely controlled, and overload-protected hydraulic drive system, ensuring reliable and safe elevator operation.

[0009] Furthermore, the pulley groups on both sides of the pulley frame are symmetrically arranged, and one side of the pulley group includes two groups of abutment pulleys symmetrically arranged on one side of the pulley frame, and the two groups of abutment pulleys are respectively abutted with two parallel side surfaces of the corresponding track. One side of the pulley frame also includes a group of guide wheels, and the guide wheels are arranged in a direction perpendicular to the abutment pulleys, and the guide wheels are abutted with the side surfaces of the track, and the three sides of the track are embedded between the abutment pulleys and the guide wheels. The above scheme, through multiple symmetrically arranged pulley sets, clamps the track from multiple directions, achieving all-round constraint. The abutment pulleys are responsible for constraining the two main parallel sides of the track, bearing the main load and eccentric load torque; while the guide pulleys are set in a direction perpendicular to the abutment pulleys, responsible for constraining the third side of the track, preventing the pulley frame from twisting or leaving the track during operation. The pulley set "holds" the track tightly, with three sides of the track embedded between the pulleys. The technical effect is to form a highly stable sliding pair, greatly enhancing the pulley frame and the entire car system's ability to resist lateral forces and torsional forces, effectively suppressing shaking and noise during operation, and ensuring smooth operation.

[0010] Furthermore, the guide wheel and the abutting pulley are both made of ductile iron and have a rust-proof surface treatment. The above solution ensures that the ductile iron possesses excellent wear resistance, sufficient strength, and toughness to withstand the repeated friction and impact loads of the wire rope. Its internal graphite structure also provides self-lubrication, vibration reduction, and noise reduction. The surface anti-rust treatment ensures long-term rust resistance and stable performance in the humid environment that can exist in the machine room. This significantly extends the pulley's service life while ensuring operational quality.

[0011] Furthermore, the track is provided with a reinforcement frame at intervals, and the reinforcement frame is fixedly connected to the bracket. Through the above solution, the reinforced frame serves as an additional support and restraint point, "tethering" the middle section of the track to the solid bracket. The technical effect is to greatly enhance the rigidity and stability of the track.

[0012] Furthermore, the traction belt is made of multiple strands of steel wire. Through the above solution, the power transmission of the stable redirection unit is guaranteed to be absolutely reliable, capable of withstanding huge dynamic tension and not easily stretched and deformed, with a long service life and a high safety factor.

[0013] Furthermore, reinforcing reinforcement is provided between the mounting base and the guide frame.

[0014] Through the above solution, the reinforced reinforcement significantly enhances the structural strength and rigidity of the connection node, prevents it from plastic deformation or fracture, ensures the reliability of the travel limit unit function, and thus guarantees the suspension safety of the entire car.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention adopts a hydraulic drive unit as the main power source, directly driving an independent pulley frame to move up and down along two parallel vertical tracks fixed on the bracket. The box is slidably connected to the track through the stroke limit unit, i.e. the mounting base and the guide frame, and is linked to the pulley frame and the bracket through the stable redirection unit, i.e. the traction belt and the redirecting wheel. The hydraulic cylinder pushes the pulley frame to move, and the redirecting wheel on the pulley frame moves accordingly, thereby changing the path of the traction belt, and finally driving the box to rise and fall at a rate with a fixed winding ratio through the guide frame. The driving part of the hydraulic cylinder and the pulley frame is mechanically decoupled from the box, i.e. the load-bearing part, which not only takes advantage of the smoothness and large load of the hydraulic drive, but also ensures the stability and safety of the box operation through the pulley and traction belt mechanism, which is fully adapted to the use scenario of home elevators; 2. The oil tank, filter, and oil pump are responsible for providing clean hydraulic oil. The overflow valve, a key safety valve, relieves pressure in the event of system overpressure, protecting the piping and components. The relief oil is discharged into the emergency storage tank rather than the tank, preventing oil temperature rise. The check valve prevents oil backflow. The three-position, four-way solenoid valve controls the oil flow, thereby precisely controlling the extension, retention, and retraction states of the cylinder. The throttle valve regulates the oil flow and controls the cylinder speed for smooth car startup and shutdown. A pressure gauge monitors system pressure in real time. This completes a comprehensive, precisely controlled, and overload-protected hydraulic drive system, ensuring reliable and safe elevator operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main viewing angle structure of the present invention; Figure 2 This is a schematic diagram of the side view structure of the present invention; Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of part A; Figure 4 It is a partial structural diagram of the pulley frame of the present application; Figure 5It is a schematic diagram of the liquid supply mechanism system of this application.

[0017] Figure numerals: 11. Box body; 12. Bracket; 13. Track; 14. Mounting base; 15. Guide frame; 16. Pulley frame; 17. Reversing wheel; 18. Traction belt; 19. Oil tank; 20. Filter; 21. Oil pump; 22. Overflow valve; 23. One-way valve; 24. Three-position four-way reversing solenoid valve; 25. Throttle valve; 26. Oil cylinder; 27. Output shaft; 28. Emergency storage tank; 29. ​​Pressure gauge; 30. Abut pulley; 31. Guide wheel. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0020] Example 1 like Figures 1 to 5 As shown, this embodiment provides an elevator car structure, including a box body 11, a bracket 12, a track 13, a travel limit unit, a stable redirection unit, and a hydraulic drive unit. The track 13 has two parallel vertically distributed on the bracket 12; The travel limit unit includes a mounting base 14 connected to the box body 11, and a guide frame 15 is provided on the mounting base 14. The guide frame 15 is in sliding engagement with the track 13 via rollers. The travel limiting unit includes a pulley frame 16 provided on the track 13, and pulley sets cooperating with the lifting track 13 are provided at both ends of the pulley frame 16; The stable redirecting unit includes a redirecting wheel 17 provided on a pulley frame 16, and a traction belt 18 is provided on the guide frame 15, which passes upward around the redirecting wheel 17 and is fixed to the bracket 12; The hydraulic drive unit drives the pulley frame 16 to move up and down along the track 13 .

[0021] Therefore, a hydraulic drive unit is used as the main power source to directly drive an independent pulley frame 16 to move up and down along two parallel vertical rails 13 fixed to the bracket 12. The box 11 is slidably connected to the rail 13 through the travel limit unit, namely the mounting base 14 and the guide frame 15, and is linked to the pulley frame 16 and the bracket 12 through the stable redirection unit, namely the traction belt 18 and the redirection wheel 17. The hydraulic cylinder pushes the pulley frame 16 to move, and the redirection wheel 17 on the pulley frame 16 moves accordingly, thereby changing the path of the traction belt 18, and finally driving the box 11 to rise and fall at a fixed rope winding ratio through the guide frame 15. The driving part of the hydraulic cylinder and the pulley frame 16 is mechanically decoupled from the box 11, i.e. the load-bearing part, which not only takes advantage of the smooth and large load advantages of the hydraulic drive, but also ensures the stability and safety of the box 11 operation through the pulley and traction belt 18 mechanism, which is fully adapted to the use scenario of home elevators.

[0022] Reference Figures 1 to 5 The hydraulic drive unit includes a hydraulic cylinder assembly disposed within the bracket 12. The hydraulic cylinder assembly includes a fluid supply mechanism. The hydraulic cylinder assembly output shaft 27 is fixed to the pulley frame 16. The fluid supply mechanism includes an oil tank 19, a filter 20, an oil pump 21, a relief valve 22, a one-way valve 23, a three-position, four-way reversing solenoid valve 24, a throttle valve 25, and an oil cylinder 26 connected by pipelines. The oil cylinder 26 is provided with an output shaft 27. The oil pump 21 delivers oil from the oil tank 19 to the oil cylinder 26. The oil cylinder 26 is used to drive the extension, retention, and retraction of the output shaft 27. The relief valve 22 is provided at the output end of the oil pump 21, and the valve end is connected to an emergency storage tank 28. A pressure gauge 29 is provided at the output end of the oil pump 21. The hydraulic cylinder assembly is built into the bracket 12, and its output shaft 27 is directly and fixedly connected to the pulley frame 16. Hydraulic pressure acts directly on the pulley frame 16, resulting in a compact structure with the power source concealed within the bracket 12, saving space and creating an aesthetically pleasing design. The short transmission chain ensures high efficiency and reduces energy loss. Direct thrust provides exceptionally high starting and operating thrust, making it suitable for heavy-duty applications. The oil tank 19, filter 20, and oil pump 21 provide clean hydraulic oil. The overflow valve 22, a key safety valve, relieves pressure in the event of system overpressure, protecting piping and components. The relief oil is discharged into the emergency storage tank 28 rather than the oil tank 19, preventing oil temperature rise. A check valve 23 prevents oil backflow. A three-position, four-way solenoid valve controls oil flow, precisely controlling the cylinder's extension, hold, and retraction states. A throttle valve 25 regulates oil flow and cylinder speed, ensuring smooth car starting and stopping. A pressure gauge 29 monitors system pressure in real time. This completes a comprehensive, precisely controlled, and overload-protected hydraulic drive system, ensuring reliable and safe elevator operation.

[0023] To enhance the stability and strength of the system, reinforcement frames (not shown) are installed at intervals between the tracks 13. These frames are fixedly connected to the brackets 12, serving as additional support and restraint points, "tethering" the middle section of the track 13 to the sturdy brackets 12. This significantly enhances the rigidity and stability of the track 13. Reinforcement bars are installed between the mounting base 14 and the guide frame 15. These reinforcements significantly increase the structural strength and rigidity of this connection, preventing plastic deformation or fracture, ensuring the functional reliability of the travel limiter, and thus safeguarding the suspension safety of the entire car.

[0024] The traction belt 18 is made of multiple strands of steel wire, which ensures that the power transmission of the stable redirection unit is absolutely reliable, can withstand huge dynamic tension and is not easy to stretch and deform, has a long service life and a high safety factor.

[0025] In order to improve the stability of device operation, refer to Figures 1 to 4 The pulley blocks on both sides of the pulley frame 16 are symmetrically arranged. One pulley block includes two sets of abutment pulleys 30 symmetrically arranged on one side of the pulley frame 16. The two sets of abutment pulleys 30 abut against two parallel side surfaces of the corresponding track 13. One side of the pulley frame 16 also includes a set of guide wheels 31. The guide wheels 31 are arranged perpendicular to the abutment pulleys 30 and abut against the side surfaces of the track 13. The track 13 is embedded on three sides between the abutment pulleys 30 and the guide wheels 31. By symmetrically arranging multiple pulley sets, the track 13 is clamped from multiple directions, achieving all-round constraint. The abutment pulleys 30 are responsible for constraining the two main parallel sides of the track 13, bearing the main load and eccentric load torque; while the guide wheels 31 are arranged perpendicular to the abutment pulleys 30 and are responsible for constraining the third side of the track 13, preventing the pulley frame 16 from twisting or detaching from the track 13 during operation. The pulley block "holds" the track 13 tightly, and the track 13 is embedded on three sides between the pulleys. Its technical effect is to form a highly stable sliding pair, which greatly enhances the ability of the pulley frame 16 and even the entire car system to resist lateral forces and torsional forces, effectively suppresses shaking and noise during operation, and ensures smooth operation. The guide wheel 31 and the abutting pulley 30 are both made of ductile iron with anti-rust treatment on the surface. Ductile iron has excellent wear resistance and sufficient strength and toughness to withstand repeated friction and impact loads of the wire rope. Its internal graphite structure also has certain self-lubrication and shock-absorbing and noise-reducing effects. The surface anti-rust treatment ensures that it will not rust for a long time in the humid environment that may exist in the machine room, and maintains stable performance. It significantly extends the service life of the pulley while ensuring the quality of operation.

[0026] Implementation principle: A hydraulic drive unit is used as the main power source to directly drive an independent pulley frame 16 to move up and down along two parallel vertical rails 13 fixed to the bracket 12. The box 11 is slidably connected to the rail 13 through the travel limit unit, namely the mounting base 14 and the guide frame 15, and is linked to the pulley frame 16 and the bracket 12 through the stable redirection unit, namely the traction belt 18 and the redirection wheel 17. The hydraulic cylinder pushes the pulley frame 16 to move, and the redirection wheel 17 on the pulley frame 16 moves accordingly, thereby changing the path of the traction belt 18, and finally driving the box 11 to rise and fall at a fixed rope winding ratio through the guide frame 15. The driving part of the hydraulic cylinder and the pulley frame 16 is mechanically decoupled from the box 11, i.e. the load-bearing part. This not only takes advantage of the smoothness and large load of the hydraulic drive, but also ensures the stability and safety of the box 11 through the pulley and traction belt 18 mechanism, making it fully suitable for the use scenario of home elevators.

[0027] It should be noted that the component connection relationships not specifically mentioned in this application are all assumed to adopt the existing technology. Since they do not involve the invention points and are widely used in the existing technology, the structural connection relationships are not described in detail.

Claims

1. An elevator car structure, characterized in that: It comprises a box (11), a bracket (12), a track (13), a travel limit unit, a stabilization and redirection unit, and a hydraulic drive unit, wherein the track (13) is provided with two parallel and vertically distributed tracks on the bracket (12); The travel limiting unit includes a mounting base (14) connected to the box body (11), a guide frame (15) is provided on the mounting base (14), and the guide frame (15) is in sliding engagement with the track (13) via rollers; The travel limiting unit includes a pulley frame (16) arranged on the track (13), and pulley blocks that cooperate with the lifting track (13) are provided at both ends of the pulley frame (16); The stable redirecting unit comprises a redirecting wheel (17) provided on the pulley frame (16); a traction belt (18) is provided on the guide frame (15) and passes upward around the redirecting wheel (17) and is fixed on the bracket (12); The hydraulic drive unit drives the pulley frame (16) to move up and down along the track (13).

2. An elevator car structure according to claim 1, characterized in that: The hydraulic drive unit includes a hydraulic cylinder assembly arranged in the bracket (12), the hydraulic cylinder assembly includes a liquid supply mechanism, and the output shaft (27) of the hydraulic cylinder assembly is fixed to the pulley frame (16).

3. An elevator car structure according to claim 2, characterized in that: The liquid supply mechanism comprises an oil tank (19), a filter (20), an oil pump (21), an overflow valve (22), a one-way valve (23), a three-position four-way reversing solenoid valve (24), a throttle valve (25), and an oil cylinder (26) connected by pipelines. The oil cylinder (26) is provided with an output shaft (27). The oil pump (21) transports oil from the oil tank (19) to the oil cylinder (26). The oil cylinder (26) is used to drive the output shaft (27) to extend, maintain, and retract. The overflow valve (22) is provided at the output end of the oil pump (21), and the valve end is connected to an emergency storage tank (28). A pressure gauge (29) is provided at the output end of the oil pump (21).

4. The elevator car structure according to claim 1, characterized in that: The pulley groups on both sides of the pulley frame (16) are symmetrically arranged, wherein one side of the pulley group includes two groups of abutting pulleys (30) symmetrically arranged on one side of the pulley frame (16), and the two groups of abutting pulleys (30) are respectively abutted with two parallel side surfaces of the corresponding track (13). The pulley frame (16) on one side also includes a group of guide wheels (31), and the setting direction of the guide wheels (31) is perpendicular to the abutting pulleys (30). The guide wheels (31) abut against the side surfaces of the track (13), and the track (13) is embedded between the abutting pulleys (30) and the guide wheels (31) on three sides.

5. An elevator car structure according to claim 4, characterized in that: The guide wheel (31) and the contact pulley (30) are both made of ductile iron, and the surfaces are treated to prevent rust.

6. The elevator car structure according to claim 1, characterized in that: The track (13) is provided with a reinforcement frame at intervals, and the reinforcement frame is fixedly connected to the bracket (12).

7. The elevator car structure according to claim 1, characterized in that: The traction belt (18) is made of multiple strands of steel wire.

8. The elevator car structure according to claim 1, characterized in that: Reinforced reinforcement is provided between the mounting base (14) and the guide frame (15).

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