Adjustable multi-layer cart

Abstract

The utility model relates to the technical field of carts, and discloses an adjustable multi-layer cart which comprises a body, the body comprises a plurality of placing plates and supporting rods, the supporting rods comprise first connecting rods and second connecting rods, and the second connecting rods movably extend into the first connecting rods; the adjusting structure comprises a fixed part and a movable part, the fixed part is fixedly arranged on the first connecting rod, the movable part is movably connected with the fixed part and extends into the first connecting rod, the movable part has a first moving position and a second moving position, and when the movable part is located at the first moving position, the movable part extends into the first connecting rod and is in contact with the second connecting rod; when the movable part is located at the first moving position, the movable part extends out of the first connecting rod and is separated from the second connecting rod, the second connecting rod is located at the movable state, and when the movable part extends out of the first connecting rod, the movable part is clamped on the fixed part. The adjustable multi-layer cart is easy to operate, high in safety and simple in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of carts, and in particular relates to an adjustable multi-layer cart. Background Art

[0002] As the requirements for efficiency and flexibility in the logistics, warehousing and retail industries continue to increase, the design and function of multi-layer carts, as an important tool for cargo handling, are also evolving. Although traditional multi-layer carts have been widely used for their sturdy frame structure and stable load-bearing capacity, due to their fixed structure, they do not have the ability to dynamically adjust the height or number of each layer according to actual loading requirements, which to some extent limits their versatility and efficiency in different application scenarios.

[0003] In order to solve this problem, the prior art proposes an improvement measure, that is, by opening a series of through holes on the support rod and using a latch to form a plug-in connection with these through holes, so as to achieve the height adjustability of the support rod. This design theoretically allows the user to flexibly adjust the distance between each layer according to the size or weight requirements of the goods, thereby improving the versatility of the cart. However, this latch-type adjustment method requires manual insertion or removal of the latch every time the height is adjusted, which is not only time-consuming and labor-intensive, but also in a high-frequency use environment, frequent plug-in and pull-out operations may cause the latch to wear or lose, affecting the long-term use of the cart. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and to provide an adjustable multi-layer cart which is easy to operate, highly safe and has a simple structure.

[0005] The purpose of the utility model can be achieved through the following technical solutions, an adjustable multi-layer cart, comprising:

[0006] A body, the body comprising a plurality of placement plates and a support rod for connecting the placement plates, the support rod comprising a first connecting rod and a second connecting rod, the second connecting rod movably extending into the first connecting rod;

[0007] An adjustment structure, the adjustment structure includes a fixed part fixed on the first connecting rod, and a movable part movably connected to the fixed part and extending into the first connecting rod, the movable part has a first moving position and a second moving position, when the movable part is in the first moving position, the movable part extends into the first connecting rod, contacts with the second connecting rod, and makes the second connecting rod in a fixed state, when the movable part is in the second moving position, the movable part extends out of the first connecting rod, separates from the second connecting rod, and makes the second connecting rod in an active state, and when the movable part extends out of the first connecting rod, the movable part is clamped on the fixed part.

[0008] In the above-mentioned adjustable multi-layer cart, the fixed part is provided with a receiving groove connected to the first connecting rod along the length direction, the movable part includes a movable column movably connected to the receiving groove, and the movable column is provided with a first limiting portion located in the receiving groove, when the movable column moves in a direction away from the first connecting rod, the first limiting portion limits the moving stroke of the movable column.

[0009] In the above-mentioned adjustable multi-layer cart, the movable part also includes a second limiting portion arranged on the movable column in a direction away from the first limiting portion, and the second limiting portion is outside the accommodating groove. When the movable column moves toward the direction close to the first connecting rod, the second limiting portion limits the moving stroke of the movable column.

[0010] In the above-mentioned adjustable multi-layer cart, the second limiting portion and the movable column are of separate designs, and the second limiting portion and the movable column are detachably connected.

[0011] In the above-mentioned adjustable multi-layer cart, a handle portion is provided on the second limiting portion away from the movable column, the handle portion is integrally formed with the second limiting portion, and the diameter of the handle portion is greater than the diameter of the fixing member.

[0012] In the above-mentioned adjustable multi-layer cart, an elastic member is provided between the accommodating groove and the first limiting portion, and the elastic member is arranged along the moving direction of the movable column, one end of which abuts against the inner wall of the accommodating groove, and the other end abuts against the first limiting portion. When the movable column moves in the direction away from the first connecting rod, the elastic member contracts, and when the movable column moves in the direction close to the first connecting rod, the elastic member expands and applies a force to the movable column to move in the direction close to the first connecting rod.

[0013] In the above-mentioned adjustable multi-layer cart, the fixing member is provided with a limiting groove connected with the accommodating groove in the direction away from the first connecting rod, and the limiting groove is adapted to the second limiting portion. When the second limiting portion is outside the limiting groove and abuts against the outer wall of the fixing member, the elastic member can be kept in a contracted state.

[0014] In the above-mentioned adjustable multi-layer cart, the adjustment structure is arranged horizontally and perpendicular to the first connecting rod. When the movable column moves to the first moving position, the movable column extends into the first connecting rod and forms abutment or clamping connection with the second connecting rod to keep the second connecting rod in a fixed state.

[0015] In the above-mentioned adjustable multi-layer cart, when the movable column is in abutment with the second connecting rod, the movable column is closely connected with the side wall of the second connecting rod or the bottom of the second connecting rod, and when the movable column is snap-connected with the second connecting rod, the movable column passes through the side wall of the second connecting rod and is snap-fitted into the second connecting rod.

[0016] In the above-mentioned adjustable multi-layer cart, the first connecting rod and the second connecting rod are both hollow structures, the first connecting rod is provided with a connecting hole for the movable column to extend into, and the diameter of the connecting hole is adapted to the diameter of the accommodating groove.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: by providing a movably connected first link and a second link, an adjustment structure is integrated on the first link, so that the adjustment structure includes a fixing part fixed on the first link, and a movable part movably connected to the fixing part, and height adjustment and fixation are achieved through separation and contact of the movable part and the second link, and the movable part is clamped on the fixed part when it extends out of the first link, so that the cart can achieve height adjustment while avoiding the problem of component loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic structural diagram of an adjustable multi-layer trolley according to an embodiment of the utility model.

[0019] Figure 2 The exploded view is an adjustable multi-layer cart according to an embodiment of the utility model.

[0020] Figure 3 It is a cross-sectional view of an adjustable multi-layer cart according to an embodiment of the utility model.

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0022] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0023] In all the drawings, the same figure marks represent the same technical features, specifically: 100, main body; 110, placement plate; 111, first placement plate; 112, second placement plate; 113, third placement plate; 120, support rod; 121, first connecting rod; 122, second connecting rod; 123, connecting hole; 200, fixing member; 210, accommodating groove; 220, limiting groove; 300, movable member; 310, movable column; 320, first limiting portion; 330, second limiting portion; 340, handle portion; 350, elastic member; 360, threaded hole. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] like Figures 1 to 5 As shown, an adjustable multi-layer cart includes a main body 100, a placement plate 110, a support rod 120, a fixing part 200 and a movable part 300.

[0027] like Figures 1 to 5 As shown, an adjustable multi-layer cart comprises:

[0028] The main body 100 includes a plurality of placement plates 110 and a support rod 120 for connecting the placement plates 110. The support rod 120 includes a first connecting rod 121 and a second connecting rod 122. The second connecting rod 122 is movably extended into the first connecting rod 121.

[0029] The adjustment structure includes a fixing member 200 fixed on the first connecting rod 121, and a movable member 300 movably connected to the fixing member 200 and extending into the first connecting rod 121. The movable member 300 has a first moving position and a second moving position. When the movable member 300 is in the first moving position, the movable member 300 extends into the first connecting rod 121, contacts the second connecting rod 122, and makes the second connecting rod 122 in a fixed state. When the movable member 300 is in the second moving position, the movable member 300 extends out of the first connecting rod 121, separates from the second connecting rod 122, and makes the second connecting rod 122 in an active state. When the movable member 300 extends out of the first connecting rod 121, the movable member 300 is clamped on the fixing member 200. By integrating the adjustment structure on the support rod 120, the problem of component loss is avoided while achieving height adjustment of the support rod 120.

[0030] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment, the main body 100 includes a plurality of placement plates 110 stacked longitudinally, and a support rod 120 arranged vertically to connect the placement plates 110, the support rod 120 includes a first connecting rod 121 and a second connecting rod 122, and the second connecting rod 122 can be movably extended into the first connecting rod 121 to achieve height adjustment between each layer of placement plates 110.

[0031] Preferably, in this embodiment, the placement plate 110 is provided with three, namely, a first placement plate 111, a second placement plate 112 and a third placement plate 113 arranged from bottom to top, and the two ends of the first connecting rod 121 are respectively connected to the first placement plate 111 and the second placement plate 112, one end of the second connecting rod 122 extends into the first connecting rod 121, and the other end is connected to the third placement plate 113, when the second connecting rod 122 moves in the first connecting rod 121, the distance between the second placement plate 112 and the third placement plate 113 can be adjusted.

[0032] It should be noted that the number of the placement plates 110 can be set according to actual usage requirements, and the number of the support rods 120 is compatible with the number of the placement plates 110.

[0033] Preferably, in this embodiment, the first connecting rod 121 and the second connecting rod 122 are each provided with four groups, which are respectively arranged at the four corners of the placement plate 110 , thereby effectively ensuring the stability of the placement plate 110 .

[0034] In this embodiment, the first connecting rod 121 and the second connecting rod 122 are both hollow structures. The first connecting rod 121 is provided with a connecting hole 123 for the movable column 310 to extend into, and the diameter of the connecting hole 123 is adapted to the diameter of the accommodating groove 210, so that the movable column 310 can smoothly extend into the first connecting rod 121 and contact the second connecting rod 122, thereby fixing the second connecting rod 122 and ensuring the stability of the second connecting rod 122 after the height is adjusted.

[0035] In order to fix the second connecting rod 122, in this embodiment, the adjustment structure is arranged horizontally and vertically connected to the first connecting rod 121. When the movable column 310 moves to the first moving position, the movable column 310 extends into the first connecting rod 121 and forms abutment or clamping with the second connecting rod 122, so that the second connecting rod 122 is in a fixed state. On the one hand, while fixing the first connecting rod 121, the smoothness and stability of the movement of the movable column 310 are effectively guaranteed, and on the other hand, the fixing form of the second connecting rod 122 is enriched.

[0036] In this embodiment, when the movable column 310 is in abutment with the second connecting rod 122, the movable column 310 is fitted and connected with the side wall of the second connecting rod 122 or the bottom of the second connecting rod 122; when the movable column 310 is clamped with the second connecting rod 122, the movable column 310 passes through the side wall of the second connecting rod 122 and is clamped into the second connecting rod 122; when the movable column 310 is fitted and connected with the side wall of the second connecting rod 122, the second connecting rod 122 can realize stepless adjustment of the height of the cart; when the movable column 310 is fitted and connected with the bottom of the second connecting rod 122 or is clamped into the second connecting rod 122, stable support for the second connecting rod 122 can be achieved, thereby effectively ensuring the stability of the overall structure of the cart.

[0037] In this embodiment, the adjustment structure includes a fixing member 200 fixed on the first connecting rod 121, and a movable member 300 movably connected to the fixing member 200 and extending into the first connecting rod 121, the movable member 300 has a first moving position and a second moving position. When the movable member 300 is in the first moving position, the movable member 300 extends into the first connecting rod 121, contacts the second connecting rod 122, and makes the second connecting rod 122 in a fixed state to ensure the stability of the second connecting rod 122 after adjustment, thereby ensuring that the third placement plate 113 connected to the second connecting rod 122 can stably place objects; when the movable member 300 is in the second moving position, the movable member 300 extends out of the first connecting rod 121, separates from the second connecting rod 122, and makes the second connecting rod 122 in an active state to ensure that the second connecting rod 122 can move in the first connecting rod 121, thereby realizing real-time height adjustment. When the movable part 300 extends out of the first connecting rod 121, the movable part 300 is horizontally clamped on the fixing part 200, so that when the second connecting rod 122 is adjusted, there is no need to remove the movable part 300 from the support rod 120 and place it elsewhere, effectively avoiding the risk of losing the movable part 300 during the adjustment process.

[0038] In this embodiment, the fixing member 200 is cylindrical and welded to the first connecting rod 121. The fixing member 200 is provided with a receiving groove 210 along the length direction, which is connected to the first connecting rod 121 and opposite to the connecting hole 123, and is used as a support point for the movable member 300. The movable member 300 includes a cylindrical movable column 310 movably connected to the receiving groove 210, and the movable column 310 is provided with a first limiting portion 320 located in the receiving groove 210. When the movable column 310 moves in a direction away from the first connecting rod 121, the first limiting portion 320 limits the moving stroke of the movable column 310, thereby effectively preventing the movable column 310 from slipping out of the fixing member 200.

[0039] In this embodiment, the first limiting portion 320 is in a circular shape, which surrounds the movable column 310, and the diameter of the first limiting portion 320 is suitable for the diameter of the accommodating groove 210, so that it can move in the accommodating groove 210 synchronously with the movement of the movable column 310. When it is engaged with the end of the accommodating groove 210, it can also limit the movement of the movable column 310.

[0040] In this embodiment, the movable member 300 also includes a second limiting portion 330 arranged on the movable column 310 away from the first limiting portion 320. The second limiting portion 330 is rectangular and is located outside the accommodating groove 210. When the movable column 310 moves toward the direction close to the first connecting rod 121, the second limiting portion 330 limits the moving stroke of the movable column 310, effectively avoiding the over-stroke movement of the movable column 310, and through cooperation with the first limiting portion 320, precise control of the bidirectional movement of the movable column 310 is achieved, avoiding structural damage caused by improper operation.

[0041] In this embodiment, the second limiting portion 330 and the movable column 310 are of split design, and the second limiting portion 330 and the movable column 310 are detachably connected, which effectively ensures the convenience of assembly of the movable part 300, and at the same time enables convenient replacement and repair of the movable column 310 when it is worn.

[0042] Preferably, in this embodiment, the second limiting portion 330 and the movable column 310 are both provided with coaxial threaded holes 360 , and the second limiting portion 330 and the movable column 310 are detachably connected by screws.

[0043] In this embodiment, the second limiting portion 330 is provided with a handle portion 340 in a direction away from the movable column 310. The handle portion 340 is in a round cake shape and is integrally formed with the second limiting portion 330. The diameter of the handle portion 340 is larger than the diameter of the fixing part 200, so that the user can easily pull the movable part 300, thereby improving the convenience of adjusting the height.

[0044] In order to further improve the stability of the movable member 300, an elastic member 350 is provided between the accommodating groove 210 and the first limiting portion 320. The elastic member 350 is arranged along the moving direction of the movable column 310, one end of which abuts against the inner wall of the accommodating groove 210, and the other end abuts against the first limiting portion 320. When the movable column 310 moves away from the first connecting rod 121, the elastic member 350 contracts. When the movable column 310 moves toward the direction close to the first connecting rod 121, the elastic member 350 expands and applies a force to the movable column 310 to move toward the direction close to the first connecting rod 121. The movable column 310 can form a continuous supporting force on the second connecting rod 122, effectively preventing the movable column 310 from coming out of the first connecting rod 121 during vibration, thereby ensuring the stability of the support and the safety of the cart during use.

[0045] Preferably, in this embodiment, the elastic member 350 is a spring.

[0046] In this embodiment, the fixing member 200 is further provided with a limiting groove 220 connected with the accommodating groove 210 in a direction away from the first connecting rod 121. The limiting groove 220 is rectangular and matches the second limiting portion 330. When the second limiting portion 330 is in the limiting groove 220 and abuts against the outer wall of the fixing member 200, the elastic member 350 can be kept in a contracted state. Through the cooperation between the limiting groove 220 and the second limiting portion 330, the elastic member 350 can be kept in a contracted state without applying additional force, so that the user does not need to hold the movable member 300 with his hands when adjusting the height of the second connecting rod 122, thereby realizing an operation experience of freeing the user's hands.

[0047] like Figure 4 As shown, when the second connecting rod 122 is in an active state, the movable column 310 is separated from the first connecting rod 121 and is clamped on the fixing member 200 .

[0048] like Figure 5 As shown, when the second connecting rod 122 is in a fixed state, the movable column 310 extends into the first connecting rod 121 , and the second limiting portion 330 is embedded in the limiting groove 220 .

[0049] The utility model provides an adjustable multi-layer trolley, and the method for adjusting the height is that the user first pulls the handle portion 340 to disengage the movable column 310 from the first connecting rod 121, and then rotates the handle portion 340 until the second limiting portion 330 contacts the outer wall of the fixing member 200, and the second connecting rod 122 can be freely moved up and down to adjust the height; after the second connecting rod 122 reaches the desired position, the handle portion 340 is rotated again to make the second limiting portion 330 embedded in the limiting groove 220, and the movable column 310 then extends into the first connecting rod 121, and fits tightly with the side wall or bottom of the second connecting rod 122, thereby firmly fixing the second connecting rod 122.

[0050] It should be noted that in the present utility model, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0051] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An adjustable multi-layer trolley, characterized in that: include: A body, the body comprising a plurality of placement plates and a support rod for connecting the placement plates, the support rod comprising a first connecting rod and a second connecting rod, the second connecting rod movably extending into the first connecting rod; An adjustment structure, the adjustment structure includes a fixed part fixed on the first connecting rod, and a movable part movably connected to the fixed part and extending into the first connecting rod, the movable part has a first moving position and a second moving position, when the movable part is in the first moving position, the movable part extends into the first connecting rod, contacts with the second connecting rod, and makes the second connecting rod in a fixed state, when the movable part is in the second moving position, the movable part extends out of the first connecting rod, separates from the second connecting rod, and makes the second connecting rod in an active state, and when the movable part extends out of the first connecting rod, the movable part is clamped on the fixed part.

2. An adjustable multi-layer trolley according to claim 1, characterized in that: The fixing member is provided with a receiving groove connected with the first connecting rod along the length direction, the movable member includes a movable column movably connected with the receiving groove, and the movable column is provided with a first limiting portion located in the receiving groove, when the movable column moves in a direction away from the first connecting rod, the first limiting portion limits the moving stroke of the movable column.

3. An adjustable multi-layer trolley according to claim 2, characterized in that: The movable member further comprises a second limiting portion arranged on the movable column in a direction away from the first limiting portion, the second limiting portion being outside the accommodating groove, and when the movable column moves toward a direction approaching the first connecting rod, the second limiting portion limits the moving stroke of the movable column.

4. An adjustable multi-layer trolley according to claim 3, characterized in that: The second limiting portion and the movable column are of split design, and the second limiting portion and the movable column are detachably connected.

5. An adjustable multi-layer trolley according to claim 4, characterized in that: A handle portion is provided on the second limiting portion in a direction away from the movable column. The handle portion is integrally formed with the second limiting portion, and a diameter of the handle portion is greater than a diameter of the fixing member.

6. An adjustable multi-layer trolley according to claim 3, characterized in that: An elastic member is provided between the accommodating groove and the first limiting portion. The elastic member is arranged along the moving direction of the movable column, one end of which abuts against the inner wall of the accommodating groove, and the other end abuts against the first limiting portion. When the movable column moves in a direction away from the first connecting rod, the elastic member contracts. When the movable column moves in a direction close to the first connecting rod, the elastic member expands and applies a force to the movable column to move in a direction close to the first connecting rod.

7. An adjustable multi-layer trolley according to claim 6, characterized in that: The fixing member is provided with a limiting groove connected with the accommodating groove in a direction away from the first connecting rod, and the limiting groove is adapted to the second limiting portion. When the second limiting portion is outside the limiting groove and abuts against the outer wall of the fixing member, the elastic member can be kept in a contracted state.

8. An adjustable multi-layer trolley according to claim 2, characterized in that: The adjustment structure is arranged horizontally and perpendicular to the first connecting rod. When the movable column moves to the first moving position, the movable column extends into the first connecting rod and forms an abutment or a clamping connection with the second connecting rod, so that the second connecting rod is in a fixed state.

9. An adjustable multi-layer trolley according to claim 8, characterized in that: When the movable column is in abutment with the second connecting rod, the movable column is in close connection with the side wall of the second connecting rod or the bottom of the second connecting rod. When the movable column is in a clamping connection with the second connecting rod, the movable column passes through the side wall of the second connecting rod and is clamped into the second connecting rod.

10. An adjustable multi-layer trolley according to claim 2, characterized in that: The first connecting rod and the second connecting rod are both hollow structures. The first connecting rod is provided with a connecting hole for the movable column to extend into, and the diameter of the connecting hole is adapted to the diameter of the accommodating groove.

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