A caster seat structure with an integrally molded injection part

Abstract

This application discloses a caster seat structure with an integrally molded injection part, relating to the field of caster manufacturing technology. It includes an n-shaped injection part and a lifting component. A wheel body is located below the n-shaped injection part, and the upper part of the n-shaped injection part is rotatably connected to a first mounting base. A pressure bearing is located at the point of rotation between the two. The top of the n-shaped injection part has a cavity for lubricating the pressure bearing, and its bottom has an integrally molded injection port for introducing grease into the cavity. The technical advantages of this application are: by designing the caster seat as an n-shaped injection part with an integrally molded injection port, the manufacturing steps of the caster seat can be reduced while ensuring strength, greatly improving production efficiency; by setting the lifting component, the caster seat structure can have a lifting effect during application, thus facilitating the formation of a unilaterally inclined unloading slope when the transfer vehicle is unloading; a brake structure is installed on the side of the n-shaped injection part, improving the stability of the caster when parked.

Description

Technical Field

[0001] This application relates to the field of caster manufacturing technology, and in particular to a caster seat structure with an integrally molded injection part. Background Technology

[0002] Caster bases, as the core load-bearing and connecting components of caster systems, are widely used in industrial equipment, logistics handling tools, medical devices, furniture, and home appliances. Their core function is to achieve a stable connection between the caster and the equipment body, and to provide a support frame for the caster's rotation and steering, directly affecting the overall equipment's mobility, load-bearing safety, and service life. With the increasing demands for equipment mobility efficiency and adaptability to various usage scenarios in modern production and life, the technical design of caster bases has gradually become a key aspect of optimizing equipment performance.

[0003] In traditional technical solutions, caster bases are mostly made of a single metal (such as cold-rolled steel plate or cast iron) through stamping and casting processes, which further increases the complexity of the manufacturing process and labor costs, and also reduces the overall production efficiency. From a manufacturing process perspective, metal bases need to undergo electroplating treatment (such as zinc plating or chrome plating), but the electroplating process requires multiple steps such as degreasing, pickling, activation, electroplating, and passivation. Not only is the process chain long and the production cycle long, but improper operation can easily lead to quality problems such as uneven plating, pinholes, and peeling. Therefore, metal caster bases no longer meet the needs of logistics handling. Furthermore, in the unloading process of transporting loose parts (such as mechanical parts and electronic components), if it is necessary to build an inclined surface for easy unloading on the transfer cart, additional padding materials (such as wooden blocks or metal blocks) are required. This is not only cumbersome and time-consuming, but the padding materials are also prone to slipping, causing instability on the inclined surface and increasing the risk of parts tipping over. Utility Model Content

[0004] This device provides a caster seat structure with an integrally molded injection-molded part, the specific implementation of which is as follows:

[0005] A caster seat structure with an integrally molded injection-molded part includes:

[0006] The injection molding part is shaped like an n, and a wheel is provided below the injection molding part;

[0007] The upper part of the n-shaped injection molding section is rotatably connected to the first mounting base. A pressure bearing is provided at the point where the two rotate. The top of the n-shaped injection molding section is provided with a cavity for lubricating the pressure bearing, and the bottom of the section is integrally formed with an injection port for introducing grease into the cavity.

[0008] Based on the above technical solutions, the n-shaped injection-molded part is the main body of the caster seat. This application directly applies the injection-molded caster seat. From a performance perspective, although metal materials have strong load-bearing capacity, they are heavy and increase energy consumption during equipment movement. However, the caster seat with the n-shaped injection-molded part as the main body can be made of high-strength engineering plastics such as glass fiber reinforced PP and nylon 66. While ensuring load-bearing capacity (meeting heavy load requirements of 50-300kg), the weight is reduced by 30%-50% compared to metal caster seats of the same specifications, effectively reducing energy consumption during equipment movement and making it more suitable for lightweight applications. Moreover, through the one-piece injection molding process... Production has also fundamentally simplified the manufacturing process of caster seats: the N-shaped structure itself has excellent mechanical support performance and can be injection molded in one go, without having to go through multiple structural processing steps such as stamping, cutting, and welding like metal caster seats. Moreover, the one-piece injection molded N-shaped body can directly integrate functional structures such as caster mounting slots and equipment connection holes, eliminating the steps of positioning calibration and welding fixation for component splicing. At the same time, antioxidants, rust inhibitors, reinforcing fibers and other modified components can be directly added to the plastic raw materials during the injection molding process, so that the caster seats have rust-proof, wear-resistant and high-strength properties as soon as they leave the factory.

[0009] Preferably, it also includes a brake structure located on the side of the n-shaped injection molding part, which includes an L-shaped brake pad and a brake pedal, with the brake pedal being linked to the L-shaped brake pad via a second linkage structure.

[0010] Preferably, the length of the horizontal braking surface of the L-shaped brake pad is not greater than the spacing between the inner walls of the n-shaped injection molding part.

[0011] Based on the above technical solutions, the brake structure configured in this caster seat draws on and applies the patent technology of "A Caster Seat Brake Structure" with application number CN202422620725.2. Its core design revolves around efficient braking and stable assembly: the brake component adopts an L-shaped integrated structure, consisting of mutually perpendicular sliding plates and brake pads. The brake pads have a specially designed inwardly contracting limiting opening at the angle where they connect with the sliding plates. This structure can effectively limit the displacement of the brake component during movement, avoiding derailment or jamming. By combining this brake structure with an integrally injection-molded caster seat, the square through hole is integrally injection-molded on the caster seat. During assembly, the brake pads can be smoothly inserted into the square through hole at an oblique angle. After installation, the limiting opening at the angle of the brake pads forms a vertical sliding fit with the inner wall of the square through hole. This "oblique insertion + vertical sliding limit" design, on the one hand, relies on the process advantages of integrated injection molding of the caster seat to ensure the structural uniformity of the square through hole and the main body of the caster seat, and on the other hand, avoids the hole position deviation caused by traditional split processing.

[0012] Preferably, it also includes a lifting component located above the first mounting seat. The lifting component includes a drive pedal, an elastic telescopic part, and a first linkage structure. The top of the elastic telescopic part is connected to the external turnover vehicle body through the second mounting seat. One end of the linkage structure is connected to the elastic telescopic part, and the other end is connected to the drive pedal. By pressing the drive pedal, the elastic telescopic part is raised, thereby driving the turnover vehicle body to achieve an inclined state during unloading.

[0013] The elastic telescopic part of the lifting assembly includes a telescopic cylinder, and a spring is vertically provided on the inner side of the telescopic cylinder.

[0014] Preferably, the first linkage structure in the lifting assembly includes a hinged angle plate and a long straight plate that are hinged to each other. The other end of the long straight plate is rotatably connected to the outer cylinder of the telescopic cylinder, and the rotation axis of the angle plate is rotatably connected to the inner cylinder of the telescopic cylinder.

[0015] Preferably, the other end of the angle plate is connected to the drive pedal.

[0016] Based on the above technical solutions, the caster base further integrates a lifting component. Through the targeted design of this component, the caster base has a flexible and controllable lifting effect in practical applications, solving the problem of constructing an inclined surface when unloading materials from the turnover cart. When the turnover cart transports loose parts (such as small mechanical parts, electronic component packaging, etc.) to the unloading point, the operator only needs to step on the drive pedal to drive one side of the turnover cart to gradually lift vertically. The turnover cart body will form a natural tilt angle around the caster at the unloading end, ultimately constructing a single-sided inclined unloading slope that meets the unloading requirements.

[0017] Preferably, the first mounting base is connected to the inner cylinder of the telescopic cylinder, and the second mounting base is connected to the outer turnover vehicle body by bolts.

[0018] In summary, this application includes the following beneficial technical effects:

[0019] 1. By designing the caster seat as an n-shaped injection molding part and integrally injection molding with an injection port, this utility model can reduce the manufacturing steps of the caster seat while ensuring its strength, and greatly improve production and assembly efficiency.

[0020] 2. By setting up a lifting component, the caster seat structure can have a lifting effect when in use, which facilitates the formation of a unilateral inclined unloading surface when the turnover vehicle is unloading materials.

[0021] 3. This utility model has a simple structure. By assembling a conventional brake structure on the side of the n-shaped injection part, the stability of the caster when parking can be improved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is an exploded structural diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of this utility model after the addition of the lifting component. Figure 1 ;

[0025] Figure 4 This is a schematic diagram of the structure of this utility model after the addition of the lifting component. Figure 2 ;

[0026] Figure 5 This is a schematic diagram of the structure of this utility model after the addition of the lifting component. Figure 3 ;

[0027] Figure 6 This is a cross-sectional view of the structure of this utility model after the lifting component is added.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Wheel body; 2. Brake structure; 3. N-shaped injection molding part; 4. First mounting base; 5. Pressure bearing; 6. Lifting assembly.

[0030] 301. Injection port

[0031] 601. Second mounting base; 602. Telescopic cylinder; 603. Drive pedal; 604. Angle plate; 605. Long straight plate; 606. Spring. Detailed Implementation

[0032] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples:

[0033] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0034] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0035] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0036] This application discloses a caster seat structure with an integrally molded injection part.

[0037] Example 1

[0038] Reference Figures 1 to 2 This embodiment discloses a caster seat structure with an integrally molded injection part, including an n-shaped injection part 3, a wheel body 1 below the n-shaped injection part 3, and a first mounting seat 4 rotatably connected above the n-shaped injection part 3. A pressure bearing 5 is provided at the point of rotation between the two, and a cavity for lubricating the pressure bearing 5 is provided at the top of the n-shaped injection part 3. An injection port 301 for introducing grease into the cavity is integrally molded at the bottom.

[0039] The first mounting base 4 is connected to the inner cylinder of the telescopic cylinder 602, and the second mounting base 601 is connected to the turnover vehicle body by bolts.

[0040] Example 2

[0041] Reference Figures 1 to 6 Based on the above embodiments, this embodiment also discloses a caster seat structure with an integrally molded injection part, and further includes a lifting component 6 disposed above the first mounting seat 4. The lifting component 6 includes a drive pedal 603, an elastic telescopic part and a first linkage structure. The top of the elastic telescopic part is connected to the external turnover vehicle body through the second mounting seat 601. One end of the linkage structure is connected to the elastic telescopic part, and the other end is connected to the drive pedal 603. By pressing the drive pedal 603 to lift the elastic telescopic part, the turnover vehicle body is driven to achieve an inclined state during unloading.

[0042] The elastic telescopic part of the lifting component 6 includes a telescopic cylinder 602, and a spring 606 is vertically provided on the inner side of the telescopic cylinder 602. The first linkage structure of the lifting component 6 includes a hinged angle plate 604 and a long straight plate 605. The other end of the long straight plate 605 is rotatably connected to the outer cylinder of the telescopic cylinder 602. The rotation axis of the angle plate 604 is rotatably connected to the inner cylinder of the telescopic cylinder 602. The other end of the angle plate 604 is connected to the drive pedal 603.

[0043] The specific implementation process is as follows: When unloading is required and the turnover vehicle is tilted to unload the material; the operator presses the drive pedal 603 with his foot, and the angle plate 604 flips down; the angle plate 604 flips down and simultaneously drives the long straight plate 605 to stand upright, and the telescopic cylinder 602 extends and the spring 606 deforms; after the long straight plate 605 stands upright, its end abuts against the end of the angle plate 604, so that even if the operator's foot is removed during unloading, this deformed state can be statically maintained; after unloading is completed, the operator kicks the drive pedal 603, and the spring 606 resets the telescopic cylinder 602.

[0044] Example 3

[0045] Reference Figures 1 to 6Based on the above embodiments, this embodiment also discloses a caster seat structure with an integrally molded injection part, and further includes a brake structure 2 disposed on the side of the N-shaped injection part 3, which includes an L-shaped brake pad and a brake pedal. The brake pedal is linked to the L-shaped brake pad through a second linkage structure. In this structure, the length of the horizontal braking surface of the L-shaped brake pad is not greater than the inner wall spacing of the N-shaped injection part 3.

[0046] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A caster base structure having an integrally formed injection molded portion, characterized by, include: The n-shaped injection molding part (3) has a wheel (1) below it; The n-shaped injection molding part (3) is rotatably connected to the first mounting base (4) above. A pressure bearing (5) is provided at the point where the two rotate. The top of the n-shaped injection molding part (3) is provided with a cavity for lubricating the pressure bearing (5), and the bottom of the part is integrally formed with an injection port (301) for introducing grease into the cavity. A lifting assembly (6) is provided above the first mounting base (4). The lifting assembly (6) includes a drive pedal (603), an elastic telescopic part, and a first linkage structure. The top of the elastic telescopic part is connected to the external turnover vehicle body through a second mounting base (601). One end of the linkage structure is connected to the elastic telescopic part, and the other end is connected to the drive pedal (603). By pressing the drive pedal (603), the elastic telescopic part is raised, thereby driving the turnover vehicle body to achieve an inclined state during unloading.

2. A caster base structure having an integral injection molded portion according to claim 1, wherein, It also includes a brake structure (2) located on the side of the n-shaped injection molding part (3), which includes an L-shaped brake pad and a brake pedal, with the brake pedal being linked to the L-shaped brake pad via a second linkage structure.

3. A caster base structure having an integral injection molded portion according to claim 2, wherein, The length of the horizontal braking surface of the L-shaped brake pad is not greater than the inner wall spacing of the n-shaped injection part (3).

4. A caster base structure having an integral injection molded portion according to claim 2, wherein, The elastic telescopic part of the lifting component (6) includes a telescopic cylinder (602), and a spring (606) is vertically provided on the inner side of the telescopic cylinder (602).

5. A caster base structure having an integral injection molded portion according to claim 4, wherein, The first linkage structure in the lifting assembly (6) includes a hinged angle plate (604) and a long straight plate (605) that are hinged to each other. The other end of the long straight plate (605) is rotatably connected to the outer cylinder of the telescopic cylinder (602). The rotation axis of the angle plate (604) is rotatably connected to the inner cylinder of the telescopic cylinder (602).

6. A caster base structure having an integral injection molded portion according to claim 5, wherein, The other end of the angle plate (604) is connected to the drive pedal (603).

7. A caster seat structure with an integrally molded injection-molded part according to claim 4, characterized in that, The first mounting base (4) and the inner cylinder of the telescopic cylinder (602), and the second mounting base (601) and the turnover vehicle body are all connected by bolts.

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