Stair climbing device

Abstract

The utility model discloses a stair climbing device, which belongs to the technical field of stair cargo carrying and comprises a carrying trolley body, the carrying trolley body comprises a frame and a cargo carrying tray mounted on the frame, and two wheels are mounted at the lower end of the frame through axles; the device further comprises an intermediate shaft and a driving motor. Crawling arms are installed at the two ends of the middle shaft, and a driven gear is installed in the middle. The driving motor is in transmission connection with a driving gear; rollers are rotationally mounted at two ends of the crawling arm; and a locking mechanism is mounted on the frame. The vehicle has three working modes: going upstairs, going downstairs and driving on a road. The device is simple in overall structure, small in size, light in weight, convenient to use, low in manufacturing cost, capable of being flexibly applied to households and good in practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of stair cargo handling, in particular to a stair climbing device. Background Art

[0002] With the acceleration of urbanization, the popularity of high-rise buildings has alleviated the problem of small urban living space to a certain extent. However, some old-style houses are not equipped with elevators. The extremely narrow stairs bring many difficulties and inconveniences to residents in carrying goods up and down the stairs. Not only is the labor intensity high and the work efficiency low, but there is also a greater risk of falling safety. And with the aggravation of aging and the scarcity of manual workers, the use of home stair climbing machines by residents living in old-style houses that are not equipped with elevators will become more and more common.

[0003] The stair climbing machine is a new type of stair climbing tool for carrying goods (people). It uses its own motion actuator to achieve the action of going up and down stairs, thereby completing the purpose of going up and down stairs. It is widely used in industries such as logistics, water delivery, moving, furniture and home appliances, as well as factories, offices, residential buildings, outdoor steps and other places. The stair climbing machine can solve the shortcomings of traditional manual handling of goods on walking stairs (high labor intensity, low operating efficiency, and a large risk of falling safety, etc.).

[0004] Most of the traditional stair climbing machines are crawler-type structures. Crawler-type stair climbing machines use motors to drive crawlers to achieve the function of climbing stairs. They are suitable for carrying heavy goods in the industrial field. However, crawler-type stair climbing machines are large in size, complex in structure, heavy in weight, expensive, and produce loud noises during operation, which makes them difficult to be flexibly used in residential homes. Utility Model Content

[0005] In order to solve the problems that carrying goods by manual stairs has high labor intensity, low working efficiency and great risk of falling, and that belt-type stair climbing machines are large in size, complex in structure, heavy in weight and expensive, and cannot be flexibly applied to residents' homes, the utility model provides a stair climbing device.

[0006] The utility model is realized by the following technical solutions:

[0007] A stair climbing device comprises a transport trolley body, the transport trolley body comprises a frame and a cargo pallet mounted on the frame, and two wheels are rotatably mounted on the lower end of the frame through an axle; it also comprises an intermediate shaft rotatably mounted on the axle and a drive motor positionally mounted on the frame; crawling arms are positionally mounted on both ends of the intermediate shaft, and a driven gear is positionally mounted in the middle; a driving gear meshing with the driven gear is transmission-connectedly mounted on the output end of the drive motor; rollers are rotatably mounted on both ends of the crawling arm; and a locking mechanism capable of locking and limiting the position of the crawling arm is also mounted on the frame.

[0008] A further improvement of the utility model is that the locking mechanism includes a locking rod which slides through the frame and can lock and limit the crawling arm. The locking rod is a J-shaped bending structure, and a knob is screwed on one end of the locking rod.

[0009] A further improvement of the utility model is that both the driving gear and the driven gear are bevel gears.

[0010] A further improvement of the utility model is that the transmission ratio of the driving gear to the driven gear is 3.

[0011] A further improvement of the utility model is that a bushing is installed between the intermediate shaft and the axle.

[0012] A further improvement of the utility model is that a boss is provided at one end of the intermediate shaft, and a locking nut is screwed onto the other end; a first sleeve and a second sleeve which are arranged between the two crawling arms and the driven gear are sleeved on the intermediate shaft.

[0013] A further improvement of the utility model is that the outer ring of the roller is covered with a rubber layer.

[0014] A further improvement of the utility model is that the roller adopts a bearing structure and is installed on the end of the crawling arm through a connecting bolt and a connecting nut.

[0015] A further improvement of the utility model is that it also includes a housing capable of enclosing the driving gear and the driven gear.

[0016] A further improvement of the utility model is that the driving motor is drivingly connected to the driving gear through a coupling.

[0017] It can be seen from the above technical solutions that the beneficial effects of the utility model are:

[0018] It has three working modes: going up stairs, going down stairs and driving on the road, and corresponds to three gears: forward gear, reverse gear and closed gear. When going up stairs, it is the forward gear, and the driving motor drives the driven gear through the active gear, thereby driving the two crawling arms to rotate (the length of the crawling arms matches the stairs), and through the rolling support of the rollers at both ends of the crawling arms and the rolling support of the matching wheels, it can realize the convenient stair transport of goods carried on the cargo pallet, thereby saving labor intensity, convenient use and labor saving. When going down stairs, it is the reverse gear, and the driving motor drives the driven gear in the opposite direction through the active gear, thereby driving the two crawling arms to rotate in the opposite direction (the length of the crawling arms matches the stairs), and through the rolling support of the rollers at both ends of the crawling arms and the rolling support of the matching wheels, it can realize the convenient stair transport of goods carried on the cargo pallet, thereby saving labor intensity, convenient use and labor saving. When driving on a flat road, the gear is closed and the drive motor stops working; the locking mechanism locks the crawling arm to limit the angle between the crawling arm and the road surface, preventing the crawling arm from interfering with the road surface, ensuring that the two wheels are always supported on the ground, thereby achieving convenient use on a flat road. The overall structure is simple, the size is small, the weight is light, the use is convenient, the cost is low, and it can be flexibly applied to residents' homes with good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0021] Figure 2 It is a schematic diagram of the structure of the transport trolley body according to a specific implementation mode of the utility model.

[0022] Figure 3 It is a schematic diagram of the intermediate shaft structure of a specific implementation mode of the utility model.

[0023] Figure 4 This is a schematic structural diagram of a crawling arm from the first perspective according to a specific implementation mode of the utility model.

[0024] Figure 5 This is a schematic structural diagram of the crawling arm of a specific implementation mode of the utility model from a second viewing angle.

[0025] In the accompanying drawings: 1-wheel bearing, 2-washer, 3-wheel mounting nut, 4-axle, 5-wheel, 6-intermediate shaft, 61-locking nut, 62-intermediate shaft external spline, 7-bushing, 8-first sleeve, 9-frame, 10-drive motor, 11-coupling, 12-driving gear, 13-locking mechanism, 14-knob, 15-roller, 16-second sleeve, 17-crawling arm, 18-retaining ring, 19-housing, 20-driven gear, 21-housing bearing, 22-connecting bolt, 23-connecting nut, 24-inner spline of crawling arm, 25, cargo pallet. DETAILED DESCRIPTION

[0026] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0027] like Figure 1-5 As shown, the utility model discloses a stair climbing device, including a transport trolley body, the transport trolley body includes a frame 9 and a cargo pallet 25 installed at the bottom of the frame 9, and two wheels 5 are rotatably installed at the lower end of the frame 9 through an axle 4. Specifically, the wheel 5 is rotatably connected and installed with the axle 4 through a wheel bearing 1, and the axle 4 includes a thicker middle section in the middle and thinner wheel mounting sections at both ends, that is, the two ends are in a stepped shaft structure, and a retaining ring 18 for positioning and installing the inner side of the wheel bearing 1 is installed at the stepped shaft position, and a washer 2 and a wheel mounting nut 3 are also installed in sequence on the outer side of the wheel 5, which is convenient for disassembly, assembly and replacement of the wheel 5, and the tire of the wheel 5 is made of highly wear-resistant rubber synthetic material, which has a good shock-absorbing and energy-absorbing effect.

[0028] The stair climbing device also includes an intermediate shaft 6 rotatably mounted on the axle 4 and a drive motor 10 positioned on the frame 9; climbing arms 17 are positioned at both ends of the intermediate shaft 6, and a driven gear 20 is positioned in the middle; a driving gear 12 meshing with the driven gear 20 is installed at the output end of the drive motor 10; rollers 15 are rotatably mounted at both ends of the climbing arm 17; and a locking mechanism 13 capable of locking the climbing arm 17 to a limited position is also installed on the frame 9.

[0029] The stair climbing device has three working modes: going up stairs, going down stairs and driving on the road, and corresponds to three gears: forward gear, reverse gear and closed gear. When going up stairs, it is the forward gear, and the driving motor 10 drives the driven gear 20 through the driving gear 12, thereby driving the two climbing arms 17 to rotate (the length of the climbing arms 17 matches the stair steps), and through the rolling support of the rollers 15 at both ends of the climbing arms 17 and the rolling support of the matching wheels 5, the goods carried on the cargo pallet 25 can be conveniently carried up stairs, thereby saving labor intensity, convenient use and labor saving. When going down stairs, it is the reverse gear, and the driving motor 10 drives the driven gear 20 in the reverse direction through the driving gear 12, thereby driving the two climbing arms 17 to rotate in the reverse direction (the length of the climbing arms 17 matches the stair steps), and through the rolling support of the rollers 15 at both ends of the climbing arms 17 and the rolling support of the matching wheels 5, the goods carried on the cargo pallet 25 can be conveniently carried down stairs, thereby saving labor intensity, convenient use and labor saving. When driving on a flat road, the gear is closed, and the driving motor 10 stops working; the locking mechanism 13 locks and limits the crawling arm 17, so that the angle between the crawling arm 17 and the road surface is within 45 degrees, preventing the crawling arm 17 from supporting and interfering with the road surface, ensuring that the two wheels 5 are always supported on the ground, thereby realizing convenient use on a flat road. The overall structure is simple, the volume is small, the weight is light, the use is convenient, the cost is low, it can be flexibly applied to residents' homes, and it is practical.

[0030] Furthermore, the driving motor 10 adopts a low-speed DC motor, which has stable operation, small size, light weight and high cost performance.

[0031] The locking mechanism 13 includes a locking rod that slides through the frame 9 and can lock and limit the climbing arm 17. The locking rod is a J-shaped bending structure, and a knob 14 is screwed on one end. The locking mechanism 13 has two extreme working positions on the left and right. When it is in the left extreme position, the climbing arm 17 is locked and limited by the J-shaped bending structure; when it is in the right extreme position, the locking mechanism 13 avoids the rotation path of the climbing arm 17 to achieve the climbing action. By rotating the knob 14, the left and right positions of the locking rod are adjusted and limited, ensuring the reliability of use (avoiding the locking mechanism 13 from moving in series), with a simple structure and convenient use.

[0032] Among them, the driving gear 12 and the driven gear 20 are both bevel gears. And the transmission ratio of the driving gear 12 to the driven gear 20 is 3. The structure is compact and the speed reduction and torque increase are effectively achieved.

[0033] A bushing 7 is installed between the intermediate shaft 6 and the axle 4. The bushing 7 enables the intermediate shaft 6 and the axle 4 to slide accurately and smoothly.

[0034] Among them, a boss is provided at one end of the intermediate shaft 6, and a locking nut 61 is screwed on the other end; the first sleeve 8 and the second sleeve 16 are mounted on the intermediate shaft 6 and are arranged between the two crawling arms 17 and the driven gear 20. Through the boss and the locking nut 61, through the first sleeve 8 and the second sleeve 16, the accuracy of positioning and installation of the driven gear 20 and the two crawling arms 17 is achieved to prevent left and right movement.

[0035] In order to reduce the operating noise, the outer ring of the roller 15 is covered with a rubber layer (using a highly wear-resistant rubber synthetic material) and has a protective effect. The rubber layer can be freely replaced after being damaged.

[0036] Among them, the roller 15 adopts a bearing structure and is installed on the end of the crawling arm 17 through a connecting bolt 22 and a connecting nut 23. The rotation is more flexible and stable, ensuring the reliability of the rolling support.

[0037] like Figure 1 As shown, the stair climbing device also includes a housing 19 that can wrap the driving gear 12 and the driven gear 20. The mounting shaft of the driving gear 12 slides through the housing 19, and a sealing ring is provided at the penetration position; a housing bearing 21 is installed at the housing 19 and the second sleeve 16 and the outer ring of the driven gear 20 to achieve the stability of the rotation of the housing 19 relative to the driven gear 20 and the second sleeve 16. The driving gear 12 and the driven gear 20 can be protected by the housing 19. The housing 19 is a split structure, and a detachable end cover is provided at one end, so as to achieve the convenience of disassembly and assembly, and facilitate the inspection and maintenance of the internal gears.

[0038] The driving motor 10 is connected to the driving gear 12 through the coupling 11. The coupling 11 is an elastic coupling, which has good shock absorption and overload protection functions, automatically absorbs various transmission deviations, and greatly improves the stability of power transmission.

[0039] Among them, the middle part of the intermediate shaft 6 is provided with an intermediate shaft external spline 62, and the inner ring of the driven gear 20 is provided with a driven gear internal spline that matches the intermediate shaft external spline 62; the two ends of the intermediate shaft 6 are provided with creeping arm mounting splines, and the middle part of the creeping arm 17 is provided with a creeping arm internal spline 24. Through the spline matching installation, the reliability of the installation is achieved and the stability of the torque transmission is guaranteed.

[0040] The stair climbing device has three working modes: ascending stairs, descending stairs and driving on the road, and corresponds to three gears: forward gear, reverse gear and closed gear. When ascending stairs, it is the forward gear, and the driving motor 10 drives the driven gear 20 through the driving gear 12, thereby driving the two climbing arms 17 to rotate (the length of the climbing arms 17 matches the stair steps), and through the rolling support of the rollers 15 at both ends of the climbing arms 17 and the rolling support of the matching wheels 5, the goods carried on the cargo pallet 25 can be conveniently carried up the stairs, thereby saving labor intensity, convenient use and labor saving. When descending stairs, it is the reverse gear, and the driving motor 10 drives the driven gear 20 in the reverse direction through the driving gear 12, thereby driving the two climbing arms 17 to rotate in the reverse direction (the length of the climbing arms 17 matches the stair steps), and through the rolling support of the rollers 15 at both ends of the climbing arms 17 and the rolling support of the matching wheels 5, the goods carried on the cargo pallet 25 can be conveniently carried down the stairs, thereby saving labor intensity, convenient use and labor saving. When driving on a flat road, the gear is closed, and the driving motor 10 stops working; the locking mechanism 13 locks and limits the crawling arm 17, so that the angle between the crawling arm 17 and the road surface is within 45 degrees, preventing the crawling arm 17 from supporting and interfering with the road surface, ensuring that the two wheels 5 are always supported on the ground, thereby realizing convenient use on a flat road. The overall structure is simple, the volume is small, the weight is light, the use is convenient, the cost is low, it can be flexibly applied to residents' homes, and it is practical.

[0041] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0042] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stair climbing device, comprising a transport trolley body, the transport trolley body comprising a frame (9) and a cargo tray (25) mounted on the frame (9), the lower end of the frame (9) being rotatably mounted with two wheels (5) via an axle (4); characterized in that: The invention also comprises an intermediate shaft (6) rotatably mounted on the axle (4) and a driving motor (10) mounted on the frame (9); crawling arms (17) are mounted on both ends of the intermediate shaft (6) and a driven gear (20) is mounted in the middle; a driving gear (12) meshing with the driven gear (20) is mounted in a transmission connection at the output end of the driving motor (10); rollers (15) are rotatably mounted on both ends of the crawling arm (17); and a locking mechanism (13) capable of locking the crawling arm (17) to a limited position is also mounted on the frame (9).

2. The stair climbing device according to claim 1, characterized in that: The locking mechanism (13) comprises a locking rod that slides through the vehicle frame (9) and is capable of locking and limiting the position of the crawling arm (17); the locking rod is a J-shaped bending structure, and a knob (14) is screwed onto one end of the locking rod.

3. The stair climbing device according to claim 1, characterized in that: The driving gear (12) and the driven gear (20) are both bevel gears.

4. The stair climbing device according to claim 3, characterized in that: The transmission ratio between the driving gear (12) and the driven gear (20) is 3.

5. The stair climbing device according to claim 1, characterized in that: A bushing (7) is installed between the intermediate shaft (6) and the axle (4).

6. The stair climbing device according to claim 1, characterized in that: A boss is provided at one end of the intermediate shaft (6), and a locking nut (61) is screwed onto the other end; a first sleeve (8) and a second sleeve (16) which are arranged between the two crawling arms (17) and the driven gear (20) are sleeved on the intermediate shaft (6).

7. The stair climbing device according to claim 1, characterized in that: The outer ring of the roller (15) is covered with a rubber layer.

8. The stair climbing device according to claim 1, characterized in that: The roller (15) adopts a bearing structure and is mounted on the end of the crawling arm (17) through a connecting bolt (22) and a connecting nut (23).

9. The stair climbing device according to claim 1, characterized in that: It also includes a housing (19) capable of enclosing the driving gear (12) and the driven gear (20).

10. The stair climbing device according to claim 1, characterized in that: The driving motor (10) is transmission-connected to the driving gear (12) via a coupling (11).

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