Stair transport cart

Abstract

The stair transportation cart comprises a frame and a roller assembly, the roller assembly comprises a wheel carrier, an adjusting component, a supporting rod, a moving component and a roller, the wheel carrier is rotationally connected to the frame, one end of the adjusting component is rotationally connected with the roller, the other end of the adjusting component is slidably connected with the wheel carrier, and the supporting rod is arranged on the supporting rod. The multiple adjusting components are arranged around the periphery of the wheel carrier, one end of each supporting rod is hinged to the corresponding adjusting component, the other end of each supporting rod is hinged to the corresponding moving component, and the moving components can move in the axial direction of the wheel carrier and drive the adjusting components to move in the radial direction of the wheel carrier. According to the stair transport cart, the distance between the rolling wheels can be adjusted according to the distance between stairs, so that the stair transport cart can adapt to the stairs with different heights, the adaptability between the stair transport cart and the stairs is improved, the working efficiency of the stair transport cart is improved, and therefore the practicability of the stair transport cart is improved.

Description

Technical Field

[0001] The present application is applied to the technical field of trolley equipment, and in particular relates to a stair transport trolley. Background Art

[0002] Whether in the production process or the office process, or in daily life, it is often necessary to transport a large amount of heavy items such as goods, materials, and equipment to the upper floors; these items are not only large in size, but also heavy in weight, which brings great challenges to the handling work, especially for people engaged in production, office or living in multi-story buildings without elevators. This is an extremely arduous task, which may cause common diseases of porters such as lumbar spondylosis and periarthritis of the shoulder, or dangerous factors such as collapse of the transported items. Therefore, equipment is needed to assist in the transportation of building bodies. The most common building transportation equipment currently available is stair climbing trolleys; stair climbing trolleys are a type of equipment used for building transportation in daily life, and they have been widely used in the field of building transportation.

[0003] However, it is found in the use of existing stair climbing trolleys that the heights of stairs in many places are different, which makes the transportation of equipment time-consuming and laborious, thus resulting in low working efficiency of the trolleys. Utility Model Content

[0004] The purpose of the present application is to solve at least one of the technical problems existing in the prior art and to provide a stair transport trolley that can adapt to stairs with steps of different heights.

[0005] The technical solution adopted by this application to solve its technical problem is:

[0006] A stair transport trolley comprises a frame and a roller assembly, wherein the roller assembly comprises a wheel frame, an adjusting component, a support rod, a moving component and a roller, wherein the wheel frame is rotatably connected to the frame, one end of the adjusting component is rotatably connected to the roller, and the other end of the adjusting component is slidably connected to the wheel frame, a plurality of adjusting components are arranged around the outer circumference of the wheel frame, one end of the support rod is hinged to the adjusting component, and the other end of the support rod is hinged to the moving component, and the moving component can move along the axial direction of the wheel frame and drive the adjusting component to move along the radial direction of the wheel frame.

[0007] In certain embodiments of the present application, an electric push rod for driving the moving component to move axially along the wheel frame is installed on the frame, and the output end of the electric push rod is connected to the moving component.

[0008] In certain embodiments of the present application, a bracket is provided on the inner side of the frame, the wheel frame is mounted on the frame via the bracket, the fixed end of the electric push rod is mounted on the bracket, and the electric push rod is located on the inner side of the wheel frame.

[0009] In certain embodiments of the present application, three sliding grooves are provided on the outer periphery of the wheel frame, and the proximal end of the adjusting component extends into the sliding grooves and is slidably connected to the wheel frame.

[0010] In certain embodiments of the present application, the frame includes a storage rack, a rotating shaft and supporting legs are provided at the bottom of the storage rack, both ends of the rotating shaft are rotatably connected to the storage rack, and the top of the supporting legs is connected to the rotating shaft.

[0011] In certain embodiments of the present application, a fixing device is provided on the frame, and the fixing device includes a baffle and a support arm, the front end of the support arm is rotatably connected to the baffle, and the rear end of the support arm is rotatably connected to the frame.

[0012] In certain embodiments of the present application, a pull-out plate is slidably connected to the frame, the outer end of the pull-out plate is rotatably connected to the rear end of the support arm, and an adjustment knob is threadedly connected to the pull-out plate, and the adjustment knob fixes the pull-out plate to the frame.

[0013] In certain embodiments of the present application, the frame is provided with a handle assembly, the handle assembly includes a handle and a slider, the bottom of the handle is rotatably connected to the slider, the frame is provided with a positioning groove that cooperates with the slider, the frame is provided with a pin that passes through the positioning groove, and the slider is provided with a through hole that cooperates with the pin.

[0014] In certain embodiments of the present application, an end portion of the latch is provided with an external thread, and the frame is connected to the end portion of the latch via a nut.

[0015] In certain embodiments of the present application, a slot is provided on the handle, and a buckle that cooperates with the slot is provided on the frame.

[0016] One of the above technical solutions has at least one of the following advantages or beneficial effects: when the stair transport cart needs to adapt to stairs of different heights, the moving part drives the adjusting part to move through the support rod. When the moving part moves toward the wheel frame, under the supporting action of the support rod, the adjusting part drives the roller away from the wheel frame. At this time, the distance between each roller becomes larger, so that the stair transport cart can adapt to higher stairs; when the moving part moves relative to the wheel frame, under the limiting action of the support rod, the adjusting part drives the roller close to the wheel frame. At this time, the distance between each roller becomes smaller, so that the stair transport cart can adapt to shorter stairs, and the stair transport cart can adjust the spacing between the rollers according to the spacing between the stairs, so as to facilitate adaptation to stairs of different heights, improve the adaptability between the stair transport cart and the stairs, improve the working efficiency of the stair transport cart, and thus increase the practicality of the stair transport cart.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is one of the three-dimensional diagrams of an embodiment of the present application;

[0020] Figure 2 This is the second stereogram of an embodiment of the present application;

[0021] Figure 3 yes Figure 1 Enlarged view of location A;

[0022] Figure 4 yes Figure 2 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0024] In the present application, if there is a description of directions (up, down, left, right, front and back), it is only for the convenience of describing the technical solution of the present application, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0025] In this application, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of this application, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In this application, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected, detachably connected, or integrally formed; they can be mechanically connected, electrically connected, or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in this application in combination with the specific content of the technical solution.

[0027] in, Figure 2 The reference direction coordinate system of the embodiment of the present application is given. Figure 2 The embodiment of the present application is described with reference to the direction shown.

[0028] The embodiment of the present application provides a stair transport cart, see Figures 1 to 4 , including a frame 100 and a roller assembly 200, the roller assembly 200 includes a wheel frame 210, an adjusting component 220, a support rod 230, a moving component 240 and a roller 250, the wheel frame 210 is rotatably connected to the frame 100, one end of the adjusting component 220 is rotatably connected to the roller 250, the other end of the adjusting component 220 is slidably connected to the wheel frame 210, a plurality of adjusting components 220 are arranged around the periphery of the wheel frame 210, one end of the support rod 230 is hinged to the adjusting component 220, the other end of the support rod 230 is hinged to the moving component 240, the moving component 240 can move along the axial direction of the wheel frame 210 and drive the adjusting component 220 to move along the radial direction of the wheel frame 210.

[0029] When the stair transport cart needs to adapt to stairs of different heights, the moving part 240 drives the adjusting part 200 to move through the support rod 230. When the moving part 240 moves toward the wheel frame 210, under the support of the support rod 230, the adjusting part 200 drives the roller 250 away from the wheel frame 210. At this time, the distance between each roller 250 becomes larger, so that the stair transport cart can adapt to higher stairs; when the moving part 240 moves relative to the wheel frame 210, under the limiting effect of the support rod 230, the adjusting part 200 drives the roller 250 close to the wheel frame 210. At this time, the distance between each roller 250 becomes smaller, so that the stair transport cart can adapt to shorter stairs, and the stair transport cart can adjust the distance between the rollers 250 according to the distance between the stairs, so as to facilitate adaptation to stairs of different heights, improve the adaptability between the stair transport cart and the stairs, improve the working efficiency of the stair transport cart, and thus increase the practicality of the stair transport cart.

[0030] The support rod 230 is an arc-shaped rod, which is pushed or pulled by adjusting the position of the moving component 240, so that the arc-shaped rod adjusts the force acting on the adjusting component 200, and the adjusting component 200 slides on the wheel frame 210, thereby driving the center wheelbase of the roller 250 to be adjusted, so as to adapt to stairs with different spacings, thereby improving the transportation convenience of the stair transport cart and high practicality.

[0031] An electric push rod 250 is installed on the frame 100 for driving the moving part 240 to move axially along the wheel frame 210. The output end of the electric push rod 250 is connected to the moving part 240. The electric push rod can drive the moving part 240 to move, so as to adjust the spacing between the rollers 250. The electric push rod has high precision and can achieve accurate position control and motion trajectory of the moving part 240; and the electric push rod can respond to instructions quickly to improve work efficiency; generally, the noise is low during operation, which improves the user's experience; the structure is relatively simple, and the installation, maintenance and maintenance are convenient: it has a long service life and stable performance, and is more energy-saving and environmentally friendly; the electric push rod 250 adopts an integrated design, with a small size, which is convenient for integration into various equipment, and can also be operated through an electronic control system, so as to facilitate the control of the spacing between the rollers 250.

[0032] A bracket 110 is provided on the inner side of the vehicle frame 100 , and the wheel frame 210 is mounted on the vehicle frame 100 through the bracket 110 . The fixed end of the electric push rod 250 is mounted on the bracket 110 , and the electric push rod 250 is located on the inner side of the wheel frame 210 .

[0033] In some embodiments, three sliding grooves are provided on the periphery of the wheel frame 210, and the proximal end of the adjusting component 220 extends into the sliding groove and is slidably connected to the wheel frame 210, which limits the movement direction of the adjusting component 220 to a certain extent, ensuring that the adjusting component 220 moves along a predetermined path, thereby ensuring the stability of the overall structure. The sliding groove reduces the friction between the adjusting component 220 and the wheel frame 210, improves the smoothness and efficiency of the movement, and can enhance the overall stability of the equipment and reduce the shaking and deviation of the adjusting component 220 during movement.

[0034] The frame 100 includes a storage rack 120. A rotating shaft 121 and supporting legs 122 are provided at the bottom of the storage rack 120. Both ends of the rotating shaft 121 are rotatably connected to the storage rack 120, and the tops of the supporting legs 122 are connected to the rotating shaft 121. When the rotating shaft 121 is rotated, the supporting legs 122 support the ground, thereby improving the supporting stability of the equipment. When it is necessary to pull the stair transport cart, the rotating shaft 121 is rotated to make the supporting legs 122 away from the ground, thereby improving the transportation convenience of the stair transport cart. A miniature electric pole is provided between the rotating shaft 121 and the supporting legs 122. In the process of supporting the frame 100, the rotating shaft 121 is rotated to support the ground, and the miniature electric pole is started to extend and retract simultaneously, thereby driving the supporting legs 122 and the ground to support each other, thereby adapting to the spacing adjustment of the adjustment component 200 and improving the stability of the equipment support.

[0035] In some embodiments, a fixing device 130 is provided on the frame 100, and the fixing device 130 includes a baffle 131 and a support arm 132. The front end of the support arm 132 is rotatably connected to the baffle 131, and the rear end of the support arm 132 is rotatably connected to the frame 100. The baffle 131 can clamp materials of different sizes and thicknesses, that is, the materials are clamped between the baffle 131 and the frame 100, thereby improving the clamping stability of the stair transport cart.

[0036] See also Figure 2 A pull-out plate 133 is slidably connected to the frame 100, and the outer end of the pull-out plate 133 is rotatably connected to the rear end of the support arm 132. An adjusting knob 134 is threadedly connected to the pull-out plate 133, and the adjusting knob 134 fixes the pull-out plate 133 to the frame 100. In the process of fixing the material, the pull-out plate 133 is slid and pulled out in the long groove of the frame 100, and fixed by adjusting the knob 134. In this process, the material is placed on the frame 100, and the material is initially blocked by the support arm 132 and the baffle 131. When the support arm 132 extends outward, the output end of the support arm 132 slides outward on the baffle 131 at the same time, so as to improve the stability of the equipment material clamping, thereby improving the transportation convenience of the equipment, thereby increasing practicality.

[0037] See also Figure 4A handle assembly 140 is provided on the frame 100, and the handle assembly 140 includes a handle 141 and a slider 142. The bottom of the handle 141 is rotatably connected to the slider 142. A positioning groove cooperating with the slider 142 is provided on the frame 100, and a latch 143 passing through the positioning groove is provided on the frame 100. A through hole cooperating with the latch 143 is provided on the slider 142. The specific position of the handle 141 can be adjusted by pulling out the slider 142. When in use, the slider 142 is slid out of the frame 100 to increase the length of the handle 141. It can be understood that a plurality of through holes are provided. By aligning the through hole of the slider 142 with a fixed length and the pin hole on the frame 100, it is convenient to fix the handles 141 of different lengths through the latch 143.

[0038] In some embodiments, the end of the pin 143 is provided with an external thread, and the frame 100 is connected to the end of the pin 143 by a nut 144, which is convenient for disassembly and maintenance. The pin 143 is inserted for clamping and fixed with the nut 144, so that the handle 141 is adjusted to an appropriate position. The ease of use of the stair transport cart is improved by adjusting the length and position of the handle 141, thereby improving the transportation convenience of the stair transport cart and increasing its practicality.

[0039] See also Figure 3 A slot 151 is provided on the handle 141, and a buckle 150 cooperating with the slot 151 is provided on the frame 100, so as to lock the handle 141. It can be understood that a plurality of slots 151 are provided on the handle 141, so as to fix the handle 141 at different positions. The buckle 150 passes through the slot 151 and the handle 141 and is movably mounted. In the process of fixing the handle 141, the handle is rotated to adjust its angle to an appropriate position, and the slot 151 of the handle 141 is also rotated accordingly. The handles at different angles are fixed by mounting the buckle 150 into the corresponding slot, and the buckle is fixed by a screw, so as to improve the adjustment performance of the handle, thereby improving the transportation convenience of the stair transport cart and increasing its practicality.

[0040] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present application, and these equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A stair transport cart, characterized in that: It includes a frame and a roller assembly, the roller assembly includes a wheel frame, an adjusting component, a support rod, a moving component and a roller, the wheel frame is rotatably connected to the frame, one end of the adjusting component is rotatably connected to the roller, the other end of the adjusting component is slidably connected to the wheel frame, a plurality of adjusting components are arranged around the periphery of the wheel frame, one end of the support rod is hinged to the adjusting component, the other end of the support rod is hinged to the moving component, the moving component can move along the axial direction of the wheel frame and drive the adjusting component to move along the radial direction of the wheel frame.

2. The stair transport trolley according to claim 1, characterized in that: An electric push rod for driving the moving component to move along the axial direction of the wheel frame is installed on the frame, and the output end of the electric push rod is connected to the moving component.

3. The stair transport trolley according to claim 2, characterized in that: A bracket is provided on the inner side of the vehicle frame, the wheel frame is mounted on the vehicle frame through the bracket, the fixed end of the electric push rod is mounted on the bracket, and the electric push rod is located on the inner side of the wheel frame.

4. The stair transport trolley according to claim 1, characterized in that: The outer periphery of the wheel frame is provided with three sliding grooves, and the proximal end of the adjusting component extends into the sliding grooves and is slidably connected with the wheel frame.

5. The stair transport trolley according to claim 1, characterized in that: The frame comprises a storage rack, a rotating shaft and supporting legs are arranged at the bottom of the storage rack, two ends of the rotating shaft are rotatably connected to the storage rack, and the top end of the supporting legs is connected to the rotating shaft.

6. The stair transport cart according to claim 1, characterized in that: The frame is provided with a fixing device, which comprises a baffle and a support arm. The front end of the support arm is rotatably connected to the baffle, and the rear end of the support arm is rotatably connected to the frame.

7. The stair transport trolley according to claim 6, characterized in that: A pull-out plate is slidably connected to the frame, an outer end of the pull-out plate is rotatably connected to the rear end of the support arm, an adjusting knob is threadedly connected to the pull-out plate, and the adjusting knob fixes the pull-out plate to the frame.

8. The stair transport cart according to claim 1, characterized in that: The frame is provided with a handle assembly, which includes a handle and a slider. The bottom of the handle is rotatably connected to the slider. The frame is provided with a positioning groove that cooperates with the slider. The frame is provided with a pin that passes through the positioning groove. The slider is provided with a through hole that cooperates with the pin.

9. The stair transport trolley according to claim 8, characterized in that: The end of the latch is provided with an external thread, and the frame is connected to the end of the latch through a nut.

10. The stair transport trolley according to claim 8, characterized in that: The handle is provided with a slot, and the frame is provided with a buckle matched with the slot.

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