Portable building material carrier suitable for narrow space

Abstract

The utility model provides a portable building material carrier suitable for a narrow space, and belongs to the technical field of material transportation. Comprising a support, a bottom frame hinged to the bottom end of the support, a fixed plate fixedly connected to the inner surface of the support, first movable plates hinged to the surfaces of the two sides of the bottom frame correspondingly, second movable plates hinged to the other sides of the first movable plates and driven plates hinged to the other sides of the second movable plates. The bottom plate is fixedly connected to the inner surface of the bottom frame, the moving wheels are fixedly installed at the bottom of the bottom frame, and the push rod is fixedly connected to the outer surface of the support. The folding assembly is matched with the locking assembly, so that the support and the bottom frame can be locked when being unfolded or folded, and the situation that the folded carrier body is suddenly unfolded when entering a narrow construction channel or is folded due to external force in the using process is avoided; the effect of greatly improving the safety, stability and operation reliability of the carrier body is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of material transportation technology, specifically relating to a portable building material handling vehicle suitable for confined spaces. Background Technology

[0002] Portable construction material transport vehicles are used to quickly and efficiently transport building materials from one location to another, especially in complex environments such as construction sites. They can significantly reduce the time and physical exertion of manual handling. These vehicles are usually designed to be foldable, making it easy for users to carry them and move freely in narrow construction passages or limited spaces, solving the problem that traditional integrated handcarts cannot enter due to their large size.

[0003] Some portable construction material transport vehicles in the prior art often lack a locking structure after folding. When entering narrow construction passages, there may be a problem of the transport vehicle suddenly unfolding. If the portable construction material transport vehicle suddenly unfolds in a narrow construction passage, it may hit the surrounding construction workers or other objects, causing personal injury or equipment damage. If the transport vehicle is still loaded with construction materials, the sudden unfolding may cause the materials to slip and injure workers or damage the materials. Utility Model Content

[0004] The purpose of this invention is to provide a portable building material transport vehicle suitable for confined spaces, aiming to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A portable building material transport vehicle suitable for confined spaces includes a transport vehicle body, comprising a bracket, a base frame hinged to the bottom end of the bracket, a fixed plate fixedly connected to the inner surface of the bracket, a first movable plate hinged to both sides of the base frame, a second movable plate hinged to the other side of the first movable plate, a driven plate hinged to the other side of the second movable plate, a bottom plate fixedly connected to the inner surface of the base frame, movable wheels fixedly installed at the bottom of the base frame, and a push rod fixedly connected to the outer surface of the bracket;

[0007] The storage mechanism includes a folding assembly for use in folding the transport vehicle body, and a locking assembly for preventing the folded transport vehicle body from suddenly unfolding in a confined space.

[0008] As a preferred embodiment of this utility model, the folding assembly includes a connecting shaft fixedly mounted on the inner surface of the bracket via a bearing, a swing rod fixedly sleeved on the through end of the connecting shaft, and a transmission rod hinged to the other end of the swing rod and used in conjunction with the base frame. The other end of the transmission rod is hinged to the outer surface of the base frame.

[0009] As a preferred embodiment of the present invention, the locking assembly includes a turntable fixedly sleeved on the outer surface of the connecting shaft, a limiting groove formed on the outer surface of the turntable, a support shaft fixedly installed on the inner wall of the limiting groove by a bearing, and a first pawl fixedly sleeved on the outer surface of the support shaft.

[0010] As a preferred embodiment of this utility model, the locking assembly further includes a spring piece fixedly installed on the inner wall of the limiting groove and used in conjunction with the first pawl, and a first ratchet fixedly connected to the outer surface of the bracket and used in conjunction with the first pawl.

[0011] In a preferred embodiment of this utility model, the first pawl engages with the inner wall of the first ratchet, and the outer surface of the turntable rotates in contact with the inner wall of the first ratchet.

[0012] As a preferred embodiment of the present invention, the locking assembly further includes a second ratchet fixedly sleeved on the outer surface of the connecting shaft, a second pawl meshing with the outer surface of the second ratchet, a swivel pin fixedly connected to the outer surface of the first ratchet and used in conjunction with the second pawl, a torsion spring sleeved on the outer surface of the swivel pin and used in conjunction with the second pawl, and a paddle fixedly connected to the through end of the support shaft.

[0013] In a preferred embodiment of this utility model, the second pawl is rotatably sleeved on the outer surface of the rotating column, the outer end face of the rotating column is fixedly connected to the outer surface of the second pawl, the other end of the rotating column is fixedly connected to the outer surface of the first ratchet, and the paddle is the force-applying end for rotating the support shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are: by cooperating with the folding component and the locking component, the bracket and the base frame can be locked when unfolded or folded, so as to prevent the transport vehicle body after folding from suddenly unfolding when entering a narrow construction channel, or from being folded by external force during use, thereby greatly improving the safety, stability and operational reliability of the transport vehicle body. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This utility model Figure 1 A magnified view of the structure at point A in the middle;

[0018] Figure 3 This is a schematic diagram of the internal structure of the first ratchet in this utility model;

[0019] Figure 4 This utility model Figure 3 A magnified structural diagram of a portion of point B in the middle section;

[0020] Figure 5 This is a schematic diagram of the folding structure of the transport vehicle body in this utility model.

[0021] In the diagram: 100, transport vehicle body; 101, bracket; 102, base frame; 103, fixed plate; 104, first movable plate; 105, second movable plate; 106, driven plate; 107, base plate; 108, moving wheel; 109, push rod; 200, storage mechanism; 201, folding assembly; 201a, connecting shaft; 201b, swing rod; 201c, transmission rod; 202, locking assembly; 202a, turntable; 202b, limiting groove; 202c, support shaft; 202d, first pawl; 202e, spring; 202f, first ratchet; 202g, second ratchet; 202h, second pawl; 202i, rotating column; 202j, torsion spring; 202k, lever. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0025] Example

[0026] Reference Figures 1-5 This is an embodiment of the present invention, which provides a portable building material transport vehicle suitable for confined spaces, comprising:

[0027] The transport vehicle body 100 includes a bracket 101, a base frame 102 hinged to the bottom end of the bracket 101, a fixed plate 103 fixedly connected to the inner surface of the bracket 101, a first movable plate 104 respectively hinged to the two sides of the base frame 102, a second movable plate 105 hinged to the other side of the first movable plate 104, a driven plate 106 hinged to the other side of the second movable plate 105, a bottom plate 107 fixedly connected to the inner surface of the base frame 102, a moving wheel 108 fixedly installed at the bottom of the base frame 102, and a push rod 109 fixedly connected to the outer surface of the bracket 101.

[0028] It should be noted that the bracket 101 and the base frame 102 are the main supporting structures of the transport vehicle body 100, providing an overall frame. The fixed plate 103, the first movable plate 104, the second movable plate 105 and the driven plate 106 are used to increase structural stability. The first movable plate 104, the second movable plate 105 and the driven plate 106 are connected by hinges to realize the folding function of the transport vehicle body 100. The moving wheel 108 is used to control the movement of the transport vehicle body 100, and the push rod 109 is used to push the transport vehicle body 100.

[0029] The storage mechanism 200 includes a folding component 201 used in conjunction with the folding transport vehicle body 100, and a locking component 202 used to prevent the folded transport vehicle body 100 from suddenly unfolding in a confined space.

[0030] Specifically, the folding assembly 201 includes a connecting shaft 201a fixedly mounted on the inner surface of the bracket 101 via a bearing, a swing rod 201b fixedly sleeved on the through end of the connecting shaft 201a, and a transmission rod 201c hinged to the other end of the swing rod 201b and used in conjunction with the base frame 102. The other end of the transmission rod 201c is hinged to the outer surface of the base frame 102.

[0031] It should be noted that the connecting shaft 201a is the rotation center of the swing rod 201b. When the bracket 101 and the base frame 102 are folded, the swing rod 201b and the transmission rod 201c can be driven from the oblique shape to the V shape, and the connecting shaft 201a can be driven to rotate clockwise through the swing rod 201b.

[0032] Furthermore, the locking assembly 202 includes a turntable 202a fixedly sleeved on the outer surface of the connecting shaft 201a, a limiting groove 202b formed on the outer surface of the turntable 202a, a support shaft 202c fixedly mounted on the inner wall of the limiting groove 202b by a bearing, and a first pawl 202d fixedly sleeved on the outer surface of the support shaft 202c.

[0033] Preferably, the locking assembly 202 further includes a spring piece 202e fixedly installed on the inner wall of the limiting groove 202b and used in conjunction with the first pawl 202d, and a first ratchet 202f fixedly connected to the outer surface of the bracket 101 and used in conjunction with the first pawl 202d.

[0034] It should also be noted that when the connecting shaft 201a rotates clockwise, it can drive the turntable 202a to rotate synchronously. The turntable 202a drives the first pawl 202d to rotate through the support shaft 202c. Then, the first ratchet 202d is squeezed into the limiting groove 202b by the first ratchet 202f. Subsequently, the reaction force of the spring piece 202e quickly resets the first pawl 202d, ensuring that the first pawl 202d always remains engaged with the first ratchet 202f, thereby limiting the counterclockwise rotation of the connecting shaft 201a.

[0035] It should be noted that the first pawl 202d engages with the inner wall of the first ratchet 202f, and the outer surface of the turntable 202a rotates in contact with the inner wall of the first ratchet 202f.

[0036] Furthermore, the locking assembly 202 also includes a second ratchet 202g fixedly sleeved on the outer surface of the connecting shaft 201a, a second pawl 202h meshing with the outer surface of the second ratchet 202g, a swivel pin 202i fixedly connected to the outer surface of the first ratchet 202f and used in conjunction with the second pawl 202h, a torsion spring 202j sleeved on the outer surface of the swivel pin 202i and used in conjunction with the second pawl 202h, and a paddle 202k fixedly connected to the through end of the support shaft 202c.

[0037] When the support frame 101 and the base frame 102 are unfolded, the connecting shaft 201a will rotate clockwise. At this time, the second pawl 202h will be engaged with the second ratchet 202g under the action of the torsion spring 202j. This engagement can effectively prevent the connecting shaft 201a from rotating counterclockwise, thus preventing the unfolded transport vehicle body 100 from folding due to external force.

[0038] The torsion spring 202j applies torsional force through the swivel pin 202i, ensuring that the second pawl 202h remains in close contact with the second ratchet 202g. Simultaneously, since one end of the swivel pin 202i is fixedly connected to the outer surface of the first ratchet 202f, and the other end is fixedly connected to the second pawl 202h, the entire locking structure can be integrated into a linkage system, ensuring the reliability of the dual locking function.

[0039] Specifically, the second pawl 202h is rotatably sleeved on the outer surface of the swivel post 202i, the outer end face of the swivel post 202i is fixedly connected to the outer surface of the second pawl 202h, the other end of the swivel post 202i is fixedly connected to the outer surface of the first ratchet 202f, and the paddle 202k is the force-applying end of the rotating support shaft 202c.

[0040] In use, the pallet 100 is moved to the entrance of a narrow space by pushing the push rod 109, and the second pawl 202h is moved to the position where it is disengaged from the second ratchet 202g. Then the bracket 101 and the base frame 102 are folded. At this time, the swing rod 201b and the transmission rod 201c change from a diagonal shape to a V shape, which drives the connecting shaft 201a to rotate clockwise. At the same time, the connecting shaft 201a drives the turntable 202a to rotate synchronously. The turntable 202a causes the first pawl 202d to rotate and squeeze into the limiting groove 202b through the support shaft 202c. Then the reaction force of the spring piece 202e quickly resets the first pawl 202d, ensuring that it is always engaged with the first ratchet 202f, thereby limiting the counterclockwise rotation of the connecting shaft 201a and realizing the locking function after folding.

[0041] When the pallet trolley body 100 needs to be unfolded: Press the lever 202k to move the first pawl 202d to the position where it is disengaged from the first ratchet 202f. Then unfold the bracket 101 and the base frame 102. The second pawl 202h remains engaged with the second ratchet 202g under the action of the torsion spring 202j, further restricting the clockwise rotation of the connecting shaft 201a and preventing the pallet trolley body 100 from being accidentally unfolded due to external force or vibration when it is folded. This ensures the safety and stability of the pallet trolley body 100 during use when it needs to be unfolded.

[0042] In summary, by cooperating with the folding component 201 and the locking component 202, the bracket 101 and the base frame 102 can be locked when unfolded or folded, preventing the transport vehicle body 100 from suddenly unfolding when entering a narrow construction passage after being folded, or from being folded by external force during use, thereby greatly improving the safety, stability and operational reliability of the transport vehicle body 100.

[0043] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0044] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0045] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A portable building material carrier suitable for use in tight spaces, characterized by: The utility model relates to a folding trolley, which comprises a trolley body (100) and a storage mechanism (200). The trolley body (100) comprises a support (101), a chassis (102) hingedly connected to the bottom end of the support (101), a fixed plate (103) fixedly connected to the inner surface of the support (101), a first movable plate (104) hingedly connected to the two side surfaces of the chassis (102), a second movable plate (105) hingedly connected to the other side of the first movable plate (104), a driven plate (106) hingedly connected to the other side of the second movable plate (105), a bottom plate (107) fixedly connected to the inner surface of the chassis (102), a moving wheel (108) fixedly installed at the bottom of the chassis (102), and a push rod (109) fixedly connected to the outer surface of the support (101). The storage mechanism (200) comprises a folding assembly (201) for folding the trolley body (100) and a locking assembly (202) for preventing the folded trolley body (100) from suddenly unfolding in a narrow space.

2. A portable building material carrier suitable for use in confined spaces according to claim 1, characterised in that: The folding assembly (201) comprises a connecting shaft (201a) fixedly installed on the inner surface of the support (101) through a bearing, a swing rod (201b) fixedly sleeved on the penetrating end of the connecting shaft (201a), and a transmission rod (201c) hingedly connected to the other end of the swing rod (201b) and matched with the chassis (102), wherein the other end of the transmission rod (201c) is hingedly connected to the outer surface of the chassis (102).

3. A portable building material carrier suitable for use in confined spaces according to claim 2, characterised in that: The locking assembly (202) comprises a rotating disc (202a) fixedly sleeved on the outer surface of the connecting shaft (201a), a limiting groove (202b) formed on the outer surface of the rotating disc (202a), a supporting shaft (202c) fixedly installed on the inner wall of the limiting groove (202b) through a bearing, and a first pawl (202d) fixedly sleeved on the outer surface of the supporting shaft (202c).

4. A portable building material carrier suitable for use in confined spaces according to claim 3, characterised in that: The locking assembly (202) further comprises a spring sheet (202e) fixedly installed on the inner wall of the limiting groove (202b) and matched with the first pawl (202d), and a first ratchet wheel (202f) fixedly connected to the outer surface of the support (101) and matched with the first pawl (202d).

5. A portable building material carrier suitable for use in confined spaces according to claim 4, characterised in that: The first pawl (202d) is in engagement with the inner wall of the first ratchet wheel (202f), and the outer surface of the rotating disc (202a) is in rotational contact with the inner wall of the first ratchet wheel (202f).

6. A portable building material carrier suitable for use in confined spaces according to claim 5 wherein: The locking assembly (202) further comprises a second ratchet wheel (202g) fixedly sleeved on the outer surface of the connecting shaft (201a), a second pawl (202h) engaged with the outer surface of the second ratchet wheel (202g), a rotating column (202i) fixedly connected to the outer surface of the first ratchet wheel (202f) and matched with the second pawl (202h), a torsional spring (202j) sleeved on the outer surface of the rotating column (202i) and matched with the second pawl (202h), and a push piece (202k) fixedly connected to the penetrating end of the supporting shaft (202c).

7. A portable building material carrier suitable for use in confined spaces according to claim 6 wherein: The second pawl (202h) is sleeved on the outer surface of the rotating column (202i), the outer end surface of the rotating column (202i) is fixedly connected with the outer surface of the second pawl (202h), the other end of the rotating column (202i) is fixedly connected with the outer surface of the first ratchet wheel (202f), and the push piece (202k) is a force applying end for rotating the support shaft (202c).

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