Wooden tray convenient to transport

Abstract

The utility model relates to the technical field of wooden trays, in particular to a wooden tray convenient to transport, which comprises a top plate, a first base and two second bases, the first base and the second bases are fixedly mounted at the bottom of the top plate, and two movable cavities are formed in each second base. The bottoms of the two second bases penetrate through the corresponding movable cavities to be provided with two limiting openings, four lifting columns are installed in the corresponding movable cavities in a lifting and sliding mode respectively, and the lifting columns are in relevant transmission fit with worm gears, worms and threaded shafts, so that the lifting heights of the lifting columns and universal wheels can be adjusted at will according to actual use requirements, and the lifting efficiency is improved. The second bases are provided with movable cavities, and the bottoms of the second bases are provided with limiting openings penetrating through the movable cavities, so that lifting adjustment of the universal wheels can be rapidly operated by rotating the rotary knobs on the premise that observation is not needed, and the operation is convenient. The device is convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of wooden pallet technology, and specifically to a wooden pallet that is convenient for transportation. Background Technology

[0002] Wooden pallets are logistics equipment used for cargo transportation, warehousing, and loading and unloading. Made of wood, they are characterized by stable structure, strong load-bearing capacity, and low cost. Used in conjunction with forklifts and racks, they improve loading and unloading efficiency and are widely used in logistics, warehousing, manufacturing, and other fields. They can bear hundreds of kilograms to several tons of goods. Pallets made of high-quality wood (such as pine and hardwood) can be reused multiple times. Compared with plastic and metal pallets, wooden pallets are cheaper, can be repaired or recycled after damage, and the surface of wood has high friction, making it less likely for goods to slip.

[0003] There are many types of wooden pallets. According to their structure, they include double-sided pallets, single-sided pallets, and wing pallets. Double-sided pallets are suitable for heavy goods or scenarios that require stacking. They have a strong load-bearing capacity. Single-sided pallets adopt a lightweight design, are suitable for one-way operation by forklifts, and have a lower cost. Wing pallets are convenient for loading and unloading from the side by forklifts or manual hydraulic pallets, saving space.

[0004] To facilitate the flexible movement of wooden pallets for short-distance transport or easy handling of goods, casters are typically installed at the bottom of the pallet. However, traditional casters are mostly fixed with screws or welds. When goods are placed on the wooden pallet and need to be stacked, the design of the casters can easily cause the pallet to be unstable, which can easily lead to the goods on the pallet falling and being damaged, resulting in inconvenience in use. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a wooden pallet that is convenient for transportation and can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a convenient wooden pallet for transportation, including a top plate and a first base and two second bases fixedly installed at the bottom of the top plate. Each of the two second bases has two movable cavities, and the bottom of each of the two second bases has two limiting ports through the corresponding movable cavities. Four lifting columns are respectively lifted and slidably installed in the corresponding movable cavities, and the cross-sectional dimensions of the four lifting columns are larger than the dimensions of the corresponding limiting ports. The bottom of each of the four lifting columns is equipped with casters that can extend out of the limiting ports.

[0008] Furthermore, each of the two second bases has an installation cavity, and the bottom of each of the two installation cavities has an insertion interface extending through the corresponding movable cavity.

[0009] Furthermore, a rotating shaft is rotatably installed in each of the two mounting cavities, and a worm gear sleeve is fixedly fitted onto the outer shaft wall of each of the two rotating shafts.

[0010] Furthermore, each of the four worm gear sleeves is fitted with a worm wheel that is rotatably mounted on the top of the mounting cavity, and each of the four worm wheels is vertically fixed with a threaded shaft at its bottom.

[0011] Furthermore, the four threaded shafts are respectively threaded into the top of the corresponding lifting column, and the four lifting columns always slide and rise in a coordinated manner through the corresponding insertion interface.

[0012] Furthermore, a knob is rotatably mounted on one side of each of the two second bases, and the two knobs are respectively fixedly connected to one end of the corresponding rotating shaft.

[0013] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0014] First, the casters for moving wooden pallets are installed at the bottom of the lifting column. Then, the lifting column is connected to the worm gear and threaded shaft for transmission, so that the lifting column and casters can be adjusted to any height according to actual needs. This allows for flexible selection of whether the casters extend out of the corresponding second base, making it convenient to use.

[0015] Secondly, a movable cavity is provided on the second base, and a limiting port is provided at the bottom of the second base through the movable cavity. Since the cross-sectional size of the limiting port is smaller than that of the lifting column, when the lifting column descends to the bottom and abuts against the limiting port, the height of the caster wheel cannot continue to descend. Therefore, the height adjustment of the caster wheel can be quickly operated by rotating the knob without observation, which further enhances its ease of use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2This is a schematic diagram of the second base structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the second base of this utility model;

[0020] Figure 4 This is a schematic diagram of the installation structure of the lifting column of this utility model.

[0021] The labels in the diagram represent:

[0022] 1. Top plate; 2. First base; 3. Second base; 31. Mounting cavity; 32. Movable cavity; 41. Rotating shaft; 42. Worm sleeve; 43. Worm wheel; 44. Threaded shaft; 45. Lifting column; 46. Caster wheel; 47. Knob. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] The present invention will be further described below with reference to the embodiments. Example 1

[0025] Reference Figure 1-4 The first embodiment of this utility model discloses a wooden pallet that is convenient for transportation, including a top plate 1 and a first base 2 and two second bases 3 fixedly installed at the bottom of the top plate 1. Each of the two second bases 3 has two movable cavities 32, and the bottom of each of the two second bases 3 has two limiting ports through the corresponding movable cavities 32. Four lifting columns 45 are respectively lifted and slidably installed in the corresponding movable cavities 32, and the cross-sectional dimensions of the four lifting columns 45 are larger than the dimensions of the corresponding limiting ports.

[0026] Both the lifting column 45 and the limiting port have square cross-sections. However, the side length of the square cross-section of the lifting column 45 is larger than that of the square cross-section of the limiting port. This limits the lowering height of the lifting column 45, allowing the four casters 46 to descend to the same height simultaneously without observation. The bottom of each of the four lifting columns 45 is equipped with casters 46 that can extend out of the limiting port. The casters 46 will not slide or scrape against the corresponding limiting port during the lifting and sliding process. Example 2

[0027] Reference Figure 1-4This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: each of the two second bases 3 has an installation cavity 31, and the bottom of each of the two installation cavities 31 has an insertion interface through the corresponding movable cavity 32. The insertion interface is designed to restrict the rotation and loosening of the lifting column 45, so that the lifting column 45 can only slide up and down. A rotating shaft 41 is rotatably installed in each of the two installation cavities 31, and a worm sleeve 42 is fixedly fitted on the outer shaft wall of each of the two rotating shafts 41. The worm sleeve 42 is a tubular structure with a worm ring fitted on its surface.

[0028] Each of the four worm sleeves 42 has a worm wheel 43 rotatably mounted on the top of the mounting cavity 31. The worm sleeves 42 and the worm wheel 43 meet the self-locking condition, that is, the worm can drive the worm wheel without external force, but the worm wheel cannot drive the worm in the opposite direction. This characteristic ensures that the caster wheel will not retract unexpectedly under load. A rotating block is installed on the top of the worm wheel 43. The top of the mounting cavity 31 has a rotating cavity that allows the rotating block to rotate in a limited position. Therefore, the four worm wheels 43 are always allowed to rotate horizontally and will not fall off or loosen. A threaded shaft 44 is vertically fixedly mounted on the bottom of each of the four worm wheels 43.

[0029] Four threaded shafts 44 are threaded into the tops of corresponding lifting columns 45. The four lifting columns 45 slide and rise in a coordinated manner through their respective insertion interfaces. Nylon bushings are fixedly fitted onto the surfaces of all four lifting columns 45. The contact between the nylon bushings and the inner walls of the insertion interfaces reduces surface wear on the lifting columns 45. A knob 47 is rotatably mounted on one side of each of the two adjacent second bases 3. Each knob 47 is fixedly connected to one end of its corresponding rotating shaft 41. (See the instruction manual attached.) Figure 1 It can be seen that the lengths of the two second bases 3 are both less than the length of the first base 2 located at the center. At the same time, there is a length difference between the two ends of the top plate 1 of the two second bases 3, which makes the knob 47 less susceptible to damage from external impacts.

[0030] The remaining structure is the same as that in Example 1.

[0031] The working process of this utility model is as follows:

[0032] The caster wheel 46 is retracted into the movable cavity 32. This is the normal use state of the wooden pallet, which is convenient for transporting goods with a forklift. Rotating the knob 47 will drive the rotating shaft 41 and the worm gear sleeve 42 to rotate, thereby engaging and driving the corresponding worm wheel 43 to rotate, which in turn drives the threaded shaft 44 to rotate. The threaded shaft 44 is threaded into the top of the lifting column 45. The lifting column 45 is always adapted to the sliding insertion interface, which causes the lifting column 45 to not rotate synchronously with the rotation of the threaded shaft 44. Therefore, the lifting column 45 will be forced to rise, thereby driving the caster wheel 46 to finally retract completely into the movable cavity 32. At this time, the weight of the entire wooden pallet is supported by the first base 2 and the two second bases 3, which can ensure sufficient stability when moving goods with a forklift.

[0033] The adjustment and change are performed when the caster wheel 46 is extended out of the movable cavity 32 and when it is retracted into the movable cavity 32. Specifically, the entire wooden pallet is rotated and tilted with the outer edge of one of the second bases 3 as the center, so that the other second base 3 is completely suspended. Then, the knob 47 at the end of the suspended second base 3 is rotated in the opposite direction, which drives the rotating shaft 41 and the worm gear sleeve 42 to rotate in the opposite direction, thereby engaging and driving the corresponding worm wheel 43 to rotate in the opposite direction, which in turn drives the threaded shaft 44 to rotate in the opposite direction. The threaded shaft 44 is threaded into the top of the lifting column 45, and the lifting column 45 is always adapted to slide through the insertion interface, which causes the lifting column 45 to be unable to rotate synchronously with the rotation of the threaded shaft 44. Therefore, the lifting column 45 will be forced to lower its height, thereby driving the corresponding caster wheel 46 to fully extend into the movable cavity 32 until the bottom of the lifting column 45 abuts against the bottom of the movable cavity 32. At this time, the knob 47 can no longer be rotated.

[0034] Following the above method, the universal wheel 46 at the bottom of the other second base 3 is fully extended from the corresponding movable cavity 32 until the bottom of the lifting column 45 abuts against the bottom of the movable cavity 32. At this point, the knob 47 can no longer be rotated. Since the four universal wheels 46 are exactly the same size, when all four universal wheels 46 are fully extended, the top plate 1 is in a horizontal state when the four universal wheels 46 are in rolling contact with the ground, making it less likely for the goods to tilt and fall during transportation.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wooden pallet for convenient transportation, characterized in that, Includes a top plate (1) and a first base (2) and two second bases (3) fixedly installed at the bottom of the top plate (1); Two movable cavities (32) are opened in each of the two second bases (3), and two limiting ports are opened through the corresponding movable cavities (32) at the bottom of each of the two second bases (3); Four lifting columns (45) are respectively lifted and slidably installed in the corresponding active cavity (32), and the cross-sectional dimensions of the four lifting columns (45) are larger than the corresponding limit port dimensions. The bottom of each of the four lifting columns (45) is equipped with a universal wheel (46) that can extend out of the limit port.

2. The wooden pallet for convenient transportation according to claim 1, characterized in that, Each of the two second bases (3) has an installation cavity (31), and the bottom of each of the two installation cavities (31) has an insertion interface through the corresponding movable cavity (32).

3. A wooden pallet for convenient transportation according to claim 2, characterized in that, A rotating shaft (41) is rotatably installed in each of the two mounting cavities (31), and a worm gear sleeve (42) is fixedly fitted on the outer shaft wall of each of the two rotating shafts (41).

4. A wooden pallet for convenient transportation according to claim 3, characterized in that, Each of the four worm sleeves (42) is fitted with a worm wheel (43) that is rotatably mounted on the top of the mounting cavity (31). Each of the four worm wheels (43) is vertically fixed with a threaded shaft (44) at its bottom.

5. A wooden pallet for convenient transportation according to claim 4, characterized in that, The four threaded shafts (44) are respectively threaded into the top of the corresponding lifting column (45), and the four lifting columns (45) always move up and down and slide through the corresponding insertion interface in a coordinated manner.

6. A wooden pallet for convenient transportation according to claim 3, characterized in that, Each of the two second bases (3) has a knob (47) rotatably mounted on one side of each adjacent side. The two knobs (47) are respectively fixedly connected to one end of the corresponding rotating shaft (41).

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