Load-bearing wheel arrangement structure, crawler device and trolley

Abstract

The utility model relates to the technical field of trolleys, in particular to a load-bearing wheel arrangement structure, a crawler device and a trolley, the load-bearing wheel arrangement structure comprises a plurality of load-bearing wheels which are rotatably connected to a supporting beam, the plurality of load-bearing wheels are arranged on the left side of the supporting beam and are divided into at least two groups, and the load-bearing wheels are arranged on the left side of the supporting beam. A certain interval is reserved between every two adjacent groups of bearing wheels; a plurality of bearing wheels are arranged on the right side of the supporting beam and divided into at least two sets, and a certain interval is reserved between every two adjacent sets of bearing wheels. According to the arrangement structure of the bearing wheels, the overall bearing capacity and the structural stability are improved through reasonable structural arrangement, and dirt can be conveniently discharged from the two sides of the supporting beam.

Description

Technical Field

[0001] This utility model relates to the field of handcart technology, specifically to a load-bearing wheel arrangement structure, a track device, and a handcart. Background Technology

[0002] Handcarts, as a widely used means of transporting goods, play an indispensable role in various fields such as logistics, warehousing, agriculture, and construction. Traditional handcarts rely on wheels for support and movement. This structure performs well on flat, hard surfaces, enabling efficient and stable handling of goods. However, when faced with terrains such as sand, mud, or rugged mountain roads, traditional handcarts become inadequate, easily getting stuck in sand, bouncing on uneven ground, or even tipping over, greatly limiting their scope of use and transportation efficiency. To solve this problem, engineers introduced the design concept of a tracked system and applied it to handcarts. This design significantly enhances the handcart's traction with the ground, allowing it to move stably on soft surfaces such as sand and mud, and greatly improving its passability and stability on rugged roads.

[0003] In the prior art, a utility model patent with publication number CN211223573U entitled "A Construction Handcart Suitable for Complex Terrain" discloses a handcart that uses a tracked device for movement. This handcart includes tracks and multiple driven wheels for load-bearing. However, it still has some problems: 1. The multiple driven wheels are arranged very close together with very small gaps between them, making it difficult to easily remove debris and dirt; 2. Each tracked device only includes one row of driven wheels, resulting in weak load-bearing capacity. Moreover, to improve load-bearing capacity, the driven wheels need to be designed to be larger, occupying a lot of space and incurring high costs; 3. There is no corresponding protective structure for each driven wheel, posing a risk that each driven wheel may detach from the track from the side. Utility Model Content

[0004] This utility model addresses the technical problems of existing handcart track device load-bearing wheel arrangement structures, such as difficulty in removing debris, large size, high cost, and structural instability. It proposes a load-bearing wheel arrangement structure that improves overall load-bearing capacity and structural stability through a reasonable structural arrangement, reduces size and cost, and facilitates the discharge of dirt from both sides of the support beam.

[0005] The technical solution of this utility model:

[0006] In one aspect, this utility model provides a load-bearing wheel arrangement structure, comprising a plurality of load-bearing wheels rotatably connected to a support beam, wherein...

[0007] The left side of the support beam is provided with multiple load-bearing wheels, which are divided into at least two groups, with a certain interval between each pair of adjacent load-bearing wheels.

[0008] The right side of the support beam is provided with multiple load-bearing wheels, which are divided into at least two groups, with a certain interval between each pair of adjacent load-bearing wheels.

[0009] Furthermore, the load-bearing wheels located on the left and right sides of the support beam are symmetrically arranged, and every two symmetrical load-bearing wheels share a central axis.

[0010] Furthermore, the number of load-bearing wheels in each group is the same.

[0011] In another aspect, this utility model provides a track device, including a load-bearing wheel arrangement structure as described in any of the above; the track device further includes a track, with each load-bearing wheel located on the inner side of the track and in load-bearing contact with the track.

[0012] Furthermore, the track is formed by splicing multiple track sections end to end, and each track section has protrusions on its inner side on both sides of the support beam; each load-bearing wheel has a groove on its radial outer surface that engages with the protrusions.

[0013] Furthermore, the multiple track sections are hinged together end to end, and each track section is provided with a first connecting hole and a second connecting hole at the front and rear. The first connecting hole on the later track section and the second connecting hole on the earlier track section are hinged together by a hinge shaft.

[0014] Furthermore, the protrusion is strip-shaped along the walking direction, the cross-section of the protrusion is arc-shaped, the cross-section of the groove is arc-shaped, and the top of the protrusion is tightly fitted with the bottom of the groove; the track device also includes guide wheels, the guide wheels are symmetrically arranged on both sides of the support beam, and a trapezoidal groove is formed on the radial outer surface of the guide wheel, the guide wheel is tightly fitted with the protrusion on the track section through the inclined surface of the trapezoidal groove.

[0015] Furthermore, each track segment has a blocking edge formed on its left and right edges; and each track segment also has a protrusion on its front side or rear side.

[0016] In another aspect, the present invention provides a handcart, including at least one track device as described in any of the above.

[0017] Furthermore, the handcart also includes a pallet, which is mounted on a support beam in the track device via a mounting bracket; the support beam is made of aluminum profile, and mounting grooves that extend from front to back are formed on the left and right sides of the support beam; the mounting bracket is a U-shaped bracket, and the heads of the mounting bolts on the left and right sides of the U-shaped bracket are placed in the mounting grooves.

[0018] By adopting the above technical solutions, the load-bearing wheel arrangement structure, track device, and handcart provided by this utility model have the following beneficial effects compared with the prior art: The load-bearing wheel arrangement structure provided by this utility model groups the load-bearing wheels and sets a certain interval between the groups, thereby facilitating the discharge of debris and dirt from the intervals; furthermore, this embodiment provides load-bearing wheels on both the left and right sides of the support beam, improving the load-bearing capacity, reducing the size of the load-bearing wheels, and also improving the stability of the structure. The track device of this utility model, through the cooperation of the protrusions on the track links and the grooves on the load-bearing wheels, improves the load-bearing capacity and anti-derailment capability. The handcart of this utility model, using the aforementioned track device, in addition to the aforementioned beneficial effects, also has the advantage of convenient installation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the load-bearing wheel arrangement structure of this utility model from the left-hand perspective;

[0020] Figure 2 This is a schematic diagram of the load-bearing wheel arrangement structure of this utility model from the right-side view.

[0021] Figure 3 This is a schematic diagram of a set of symmetrical load-bearing wheels according to the present invention;

[0022] Figure 4 This is a schematic diagram of the track structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the track device of this utility model from the left-hand perspective;

[0024] Figure 6 This is a schematic diagram of the track device of this utility model from the right-hand perspective;

[0025] Figure 7 for Figure 5 Enlarged view of point I in the image;

[0026] Figure 8 This is a schematic diagram showing the fit between the groove on the load-bearing wheel and the protrusion on the track section of this utility model;

[0027] Figure 9 This is a schematic diagram showing the fit between the trapezoidal groove on the guide wheel and the protrusion on the track section of this utility model;

[0028] Figure 10 This is a schematic diagram of the hinge connection between two adjacent track sections of this utility model;

[0029] Figure 11 This is a structural schematic diagram of the track link of this utility model from a first-view perspective.

[0030] Figure 12This is a structural schematic diagram of the track link of this utility model from a second perspective.

[0031] Figure 13 This is a schematic diagram of the overall structure of the handcart of this utility model;

[0032] Figure 14 This is a structural schematic diagram of the support beam and mounting frame of this utility model.

[0033] in,

[0034] 1. Load-bearing wheel, 11. Spacing, 12. Central shaft, 13. Groove, 13. Support beam, 21. Mounting groove, 21. Track, 3. Track section, 31. Protrusion, 311. Connecting block, 312. First connecting hole, 3121. Second connecting hole, 3122. Hinge shaft, 3123. Clearance groove, 3124. First hole side forming groove, 3125. Second hole side forming groove, 3126. Blocking edge, 313. Protrusion, 314. Guide wheel, 41. Trapezoidal groove, 41. Support plate, 5. Mounting bracket, 6. Mounting bolt, 61. Mounting nut, 62. Support tube, 63. Handrail, 7. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0038] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0040] like Figure 1-3 As shown, this embodiment provides a load-bearing wheel arrangement structure that can be used in a handcart track device. It includes a plurality of load-bearing wheels 1, which are rotatably connected to a support beam 2, for example, through components such as shafts and bearings. The support beam 2 is a main beam for support, bearing the weight of the goods and transmitting the load-bearing force to the plurality of load-bearing wheels 1.

[0041] Furthermore, the load-bearing wheels 1 are distributed on the left and right sides of the support beam 2, with multiple load-bearing wheels 1 on each side. Specifically, on the left side of the support beam 2, the multiple load-bearing wheels 1 are divided into at least two groups, with a certain interval 11 between each adjacent group of load-bearing wheels 1; on the right side of the support beam 2, the multiple load-bearing wheels 1 are also divided into at least two groups, with a certain interval 11 between each adjacent group of load-bearing wheels 1.

[0042] Thus, the load-bearing wheel arrangement structure provided in this embodiment, compared with the prior art, groups the load-bearing wheels 1 and sets a certain interval 11 between two adjacent groups of load-bearing wheels, so as to facilitate the discharge of debris, dirt and the like from the interval 11; in addition, this embodiment sets load-bearing wheels 1 on both the left and right sides of the support beam 2, which improves the load-bearing capacity, can reduce the size of the load-bearing wheels 1, and also improves the stability of the structure.

[0043] Preferably, in this embodiment, the number of load-bearing wheels 1 on both sides of the support beam 2 is the same, and they are arranged symmetrically in a one-to-one correspondence. This ensures that the load-bearing wheels 1 on both sides receive the same load-bearing capacity, resulting in greater stability. Furthermore, this arrangement allows each pair of symmetrical load-bearing wheels 1 to share a central shaft 12, facilitating installation and saving costs. Additionally, preferably, the number of load-bearing wheels 1 in each group is the same, further enhancing stability.

[0044] For example Figure 1 As shown, nine load-bearing wheels 1 are provided on each side of the support beam 2. These load-bearing wheels 1 are symmetrically arranged with the support beam 2 as the center, and every two symmetrical load-bearing wheels 1 share a central axis 12. On the left / right side, the nine load-bearing wheels 1 are divided into three groups of three load-bearing wheels 1. There is a certain interval 11 between each pair of adjacent groups of load-bearing wheels 1, and this interval 11 is larger than the gap between two load-bearing wheels 1 within a group. Of course, in other embodiments, the total number of load-bearing wheels 1, the number of load-bearing wheels 1 on each side, the number of groups of load-bearing wheels 1 on each side, the number of load-bearing wheels 1 in each group, whether the load-bearing wheels 1 are symmetrical, the specific size of the interval 11, etc., can be set according to actual needs.

[0045] like Figure 4-12 As shown, this embodiment also provides a track device that can be used for handcarts. The track device includes a load-bearing wheel arrangement structure as described above. In addition, the track device also includes a track 3, with each load-bearing wheel 1 located on the inner side of the track 3 and in contact with a portion of the track 3, so as to transmit the force borne by the load-bearing wheel 1 to the track 3.

[0046] Preferably, the track 3 is formed by splicing together multiple track sections 31 end to end, such as... Figure 7-8 Each track link 31 has a protrusion 311 on its inner side, i.e., the side facing the load-bearing roller 1. Each track link 31 has two protrusions 311, which are symmetrically arranged around the support beam 2 to fit with the load-bearing rollers 1 on both sides of the support beam 2. Furthermore, each load-bearing roller 1 has a groove 13 formed on its radial outer surface. When the track device is moving, the load-bearing roller 1 can always maintain engagement with at least one protrusion 311 on the left / right side of the track link 31 through its groove 13.

[0047] Thus, by engaging the groove 13 on the load-bearing roller 1 with the protrusion 311 on the track link 31, the load-bearing area is increased, thereby improving the load-bearing capacity. Under the same load-bearing capacity, the size of the load-bearing roller 1 can be reduced, lowering costs. Furthermore, by using the protrusion 311 on the track link 31 to limit and block the groove 13 on the load-bearing roller 1, lateral relative displacement between the load-bearing roller 1 and the track 3 can be prevented, thus preventing the load-bearing roller 1 from detaching from the track 3. In addition, the track 3 is formed by splicing multiple track links 31, so that the protrusion 311 is not a complete integral piece conforming to the track 3, but rather small protrusions 311 distributed across multiple track links 31. If the track 3 were a single, continuous piece, and a complete protrusion conforming to the track 3 were used, only soft materials such as rubber could be used for both the track 3 and the protrusion 311 to ensure movement. However, in this embodiment, the track 3 is formed by splicing multiple track links 31, allowing the track links 31 to be made of hard materials such as metal or plastic, increasing strength.

[0048] Preferably, in this embodiment, multiple track sections 31 are hinged end to end, each track section 31 has the same structure, and each track section 31 is provided with a first connecting hole 3121 and a second connecting hole 3122 at its front and rear positions respectively. The first connecting hole 3121 on the subsequent track section 31 can be aligned with the center of the second connecting hole 3122 on the previous track section 31, and the hinge is achieved in conjunction with the hinge shaft 3123 and fasteners such as screws and nuts.

[0049] Specifically, a connecting block 312 protrudes from the inner side of the track link 31. A first connecting hole 3121 and a second connecting hole 3122 are formed at the front and rear positions of the connecting block 312, respectively. The front part of the connecting block 312, including the first connecting hole 3121, protrudes from the body of the track link 31. An avoidance groove 3124 is formed in the middle of the front part. The avoidance groove 3124 is adapted to the rear part of the connecting block 312, including the second connecting hole 3122. The first connecting hole 3121 is formed through the left and right protruding parts of the front part of the connecting block 312, and the second connecting hole 3122 is formed through the rear part of the connecting block 312.

[0050] Furthermore, at least two first hole-side forming grooves 3125 are formed on the connecting block 312 radially outward from each first connecting hole 3121, such as... Figure 10-12Taking the first connecting hole 3121 on the left as an example, the two first hole side forming grooves 3125 are located at the upper left and lower right respectively, and the two first hole side forming grooves 3125 are set close to each other, so that the first connecting hole 3121 through the left and right is formed at the bottom of the two first hole side forming grooves 3125. In order to ensure the effective splicing of each track section 31, the dimensional accuracy of the track section 31 is required to be high, so pressure casting is preferred for manufacturing. In this embodiment, the front part of the connecting block 312, including the first connecting hole 3121, protrudes from the body of the track section 31, which facilitates the hinge between each track section 31; and the first hole side forming grooves 3125 can be set above and below this protruding part, which simplifies the mold. The mold design here only needs to open and close in the vertical direction, and there is no need to set the sliding position.

[0051] Similarly, at least two second hole-side forming grooves 3126 are formed on the connecting block 312 radially outward of the second connecting hole 3122, such as... Figure 10-12 The system has three second-hole side forming grooves 3126, with two located at the upper left and upper right respectively, and the third located at the rear. The three grooves are positioned close together, forming a through-hole 3122 at the bottom of each groove. Since the protrusions 311 exist on the left and right sides of the track link 31, the third groove is positioned at the rear for ease of mold design and manufacturing.

[0052] In this embodiment, as Figure 7-8 As shown, the protrusion 311 on the track link 31 is strip-shaped along the walking direction, and the cross-section of the protrusion 311 is arc-shaped; furthermore, the cross-section of the groove 13 on the load-bearing wheel 1 is arc-shaped, and the top of the arc shape of the protrusion 311 is tightly fitted with the bottom of the arc shape of the groove 13, i.e., in close contact, to improve the load-bearing capacity, while the left and right sides of the arc shape of the protrusion 311 are left with a certain gap with the left and right sides of the arc shape of the groove 13 to facilitate turning. In addition, as Figure 1-2 As shown, the track device in this embodiment also includes guide wheels 4, which are symmetrically arranged on both sides of the support beam 2, and are distributed in two locations at the front and rear; as shown Figure 9 As shown, a trapezoidal groove 41 is formed on the radial outer surface of the guide wheel 4. The guide wheel 4 is in close contact with the arc-shaped side of the protrusion 311 on the track section 31 through the inclined surface of the trapezoidal groove 41. The bottom surface of the trapezoidal groove 41 does not contact the arc-shaped top of the protrusion 311, which facilitates turning.

[0053] like Figure 10-12As shown, in this embodiment, each track link 31 also has a blocking edge 313 on its left and right edges, which can further block the load-bearing wheel 1 and prevent the load-bearing wheel 1 from coming off the side relative to the track 3. In this embodiment, each track link 31 is also symmetrically provided with a protrusion 314 on its front side. Adjacent track links 31 contact each other through this protrusion 314, thereby leaving gaps on the left and right sides of each protrusion 314, reducing the possibility of debris being trapped between adjacent track links 31. Of course, the protrusion 314 can also be provided on the rear side of each track link 31.

[0054] like Figure 13-14 As shown, this embodiment also provides a handcart, which includes a pallet 5 and two track devices as described above, symmetrically distributed below the pallet 5. In other embodiments, the track device may be a single device, located at the center below the pallet 5; or the track device may be three or more, evenly distributed below the pallet 5.

[0055] Specifically, in this embodiment, the handcart further includes a handle 7, which is disposed on the pallet 5; the lower left and lower right sides of the pallet 5 are respectively mounted on the support beams 2 in each track device via two mounting brackets 6. The support beams 2 are preferably made of aluminum profiles, such as GY-4080C aluminum profiles. Figure 14 The mounting bracket 6 has through mounting grooves 21 on both its left and right sides. It is a U-shaped bracket installed upside down. During installation, the left and right sides of the mounting bracket 6 are connected by mounting bolts 61, mounting nuts 62, and support tubes 63, respectively. The heads of the mounting bolts 61 can be placed in the mounting grooves 21, facilitating the adjustment of the front-to-back position of the mounting bracket 6 and the support plate 5 relative to the support beam 2. After adjustment, the positions are locked in place. This design allows the track device to accommodate various sizes of support plates 5 and mounting brackets 6. For example, when the size of the support plate 5 changes, or the front-to-back distance between the two mounting brackets 6 on the same side changes, installation can be easily performed without needing to drill additional mounting holes on the support beam 2.

[0056] As can be seen from the above, the load-bearing wheel arrangement structure, track device, and handcart provided in this embodiment improve the overall load-bearing capacity and structural stability through a reasonable structural arrangement, reduce costs, and facilitate the discharge of dirt from both sides of the support beam; the track device improves the load-bearing capacity and anti-slip capability through the cooperation of the protrusions on the track links and the grooves on the load-bearing wheels; the handcart using the track device, in addition to the aforementioned advantages, also has the advantage of convenient installation.

[0057] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A load-bearing wheel arrangement structure, characterized in that, It includes several load-bearing wheels (1) rotatably connected to the support beam (2), wherein, The support beam (2) has multiple load-bearing wheels (1) on its left side, which are divided into at least two groups, with a certain interval (11) between each two adjacent groups of load-bearing wheels (1). The right side of the support beam (2) is provided with multiple load-bearing wheels (1), which are divided into at least two groups, with a certain interval (11) between each two adjacent groups of load-bearing wheels (1).

2. The load-bearing wheel arrangement structure according to claim 1, characterized in that, The load-bearing wheels (1) located on the left and right sides of the support beam (2) are symmetrically arranged, and each pair of symmetrical load-bearing wheels (1) shares a central shaft (12).

3. The load-bearing wheel arrangement structure according to claim 2, characterized in that, The number of load-bearing wheels (1) in each group is the same.

4. A tracked device, characterized in that, It includes a load-bearing wheel arrangement structure as described in any one of claims 1-3; the track device further includes a track (3), and each load-bearing wheel (1) is located on the inner side of the track (3) and is in load-bearing contact with the track (3).

5. The tracked device according to claim 4, characterized in that, The track (3) is formed by splicing multiple track sections (31) end to end. Each track section (31) has a protrusion (311) on its inner side on both sides of the support beam (2). Each load-bearing wheel (1) has a groove (13) on its radial outer surface that cooperates with the protrusion (311).

6. The tracked device according to claim 5, characterized in that, Multiple track sections (31) are hinged together end to end. Each track section (31) is provided with a first connecting hole (3121) and a second connecting hole (3122) at the front and rear. The first connecting hole (3121) on the next track section (31) and the second connecting hole (3122) on the previous track section (31) are hinged together with the hinge shaft (3123).

7. The tracked device according to claim 5, characterized in that, The protrusion (311) is strip-shaped along the walking direction, and the cross-section of the protrusion (311) is arc-shaped. The cross-section of the groove (13) is arc-shaped. The top of the protrusion (311) is tightly fitted with the bottom of the groove (13). The track device also includes a guide wheel (4). The guide wheel (4) is symmetrically arranged on both sides of the support beam (2). A trapezoidal groove (41) is formed on the radial outer surface of the guide wheel (4). The guide wheel (4) is tightly fitted with the protrusion (311) on the track section (31) through the inclined surface of the trapezoidal groove (41).

8. The tracked device according to claim 5, characterized in that, Each track link (31) also has a blocking edge (313) formed on its left and right edges; each track link (31) also has a protrusion (314) on its front side or rear side.

9. A handcart, characterized in that, It includes at least one tracked device as described in any one of claims 4-8.

10. The handcart according to claim 9, characterized in that, The handcart also includes a pallet (5), which is mounted on the support beam (2) in the track device via a mounting bracket (6). The support beam (2) is made of aluminum profile, and the left and right sides of the support beam (2) have through mounting grooves (21). The mounting bracket (6) is a U-shaped bracket, and the heads of the mounting bolts (61) on the left and right sides of the U-shaped bracket are placed in the mounting grooves (21).

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