Novel folding wheel device

Abstract

The utility model relates to the field of folding wheels, in particular to a novel folding wheel device. Comprising a positioning plate, a wheel seat, a polyurethane wheel and a shell, the shell is of a vertically-arranged rectangular shell structure, and L-shaped rotating grooves are formed in the bottom of the shell and the side edge adjacent to one side of the shell. The side face of the positioning plate is a large sector with the sector larger than 180 degrees, a first rotating shaft is rotatably inserted into the circle center of the positioning plate, the two sides of the first rotating shaft are inserted and fixed to shaft seats, and the shaft seats are fixed to the two sides of the vertical section of the rotating groove. The device has the characteristics of safety, reliability, simple structure, flexibility in rotation, convenience in maintenance, low manufacturing cost and the like. And the use requirements of users can be completely met. The device has the characteristics of simple structure, low manufacturing cost, small size, portability, safety, reliability, convenience in maintenance and the like.

Description

Technical Field

[0001] This utility model relates to the field of folding wheels, and in particular to a novel folding wheel device. Background Technology

[0002] Products frequently need to be moved out (or into) their packaging for inspection and maintenance. The product support cart is equipped with four folding wheels, which are used to support and move the products. Due to space limitations in the packaging, the folding wheels must be folded up when the product is being moved inside the packaging. When the support cart needs to be moved out of the product packaging, the folding wheels must be lowered and secured to ensure the safe movement of the product support cart.

[0003] A folding wheel device was developed for use with a product support vehicle. Its function is to solve the problems of moving, supporting, and folding the product support vehicle. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a novel folding wheel device, including a positioning plate, a wheel seat, a polyurethane wheel, and a housing; the housing is a vertically arranged rectangular housing structure, and the bottom and one adjacent side of the housing are provided with an "L"-shaped rotating groove; the positioning plate is a large fan-shaped structure with a side surface greater than 180 degrees, and a first rotating shaft is rotatably inserted into the center of the positioning plate. The two sides of the first rotating shaft are inserted into and fixed on the shaft seat, and the shaft seat is fixed on both sides of the vertical section of the rotating groove. One side of the positioning plate rotates in the rotating groove. A plate seat is installed on the outer side of the positioning plate, and a wheel seat is installed on the plate seat. A polyurethane wheel is installed on the wheel seat; the positioning plate below the plate seat is provided with a lower positioning hole, and an upper positioning hole is provided on the opposite side of the lower positioning hole on the positioning plate. A pluggable pin is provided on the lower side of the rotating groove at a position corresponding to the movement path of the upper and lower positioning holes. When the polyurethane wheel is bent upwards and folded up, the pin is inserted into the upper positioning hole for limiting.

[0005] An arc-shaped concave shell is provided on the upper part of the housing near the polyurethane wheel. When the polyurethane wheel is bent upwards and folded up, one side of the polyurethane wheel is inserted into the concave shell.

[0006] A second rotating shaft is fixedly installed in the middle of the plate base. The end of the second rotating shaft is threaded. A bearing assembly is fitted onto the second rotating shaft with an interference fit. The outer ring of the bearing assembly is inserted into the wheel seat. The threaded end of the second rotating shaft passes through the wheel seat and is limited by a nut. A wheel axle is provided at the upper end of the wheel seat. The polyurethane wheel is limited to rotating on the wheel axle.

[0007] A pin seat is provided on the lower inner side of the housing, corresponding to the position of the rotating groove. A pin sleeve is provided on the outer side of the housing, corresponding to the position of the pin seat. The pin sleeve, the side of the housing, and the pin seat are fixed by bolts arranged in a circular array. A telescopic hole with a diameter smaller than its inner cavity is provided on one side of the pin sleeve. The pin sleeve completely penetrates the side of the housing and the pin seat. An opening with the same diameter as the penetration hole is provided on the side of the housing and the pin seat. A pin is provided inside the pin sleeve. A telescopic rod matching the telescopic hole is provided on one side of the pin. One end of the telescopic rod passes through the telescopic hole and is fixedly connected to the handle. A spring is sleeved on the outer ring of the telescopic rod inside the pin seat. Under normal conditions, the end of the pin is inserted into the pin seat and limits the upper positioning hole and the lower positioning hole.

[0008] A cover plate is provided on the side of the housing away from the wheel seat.

[0009] The beneficial effects of this utility model are as follows:

[0010] This device features safety and reliability, simple structure, flexible rotation, convenient maintenance, and low manufacturing cost. It fully meets user requirements. It is characterized by its simple structure, low manufacturing cost, compact size, light weight, safety, reliability, and ease of maintenance. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is an exploded view of the present invention;

[0014] Figure 3 This is a schematic diagram of the internal structure of the pin holder and pin sleeve. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] See Figure 1-3 .

[0017] This utility model discloses a novel folding wheel device, including a positioning plate 1, a wheel seat 2, a polyurethane wheel 3, and a housing 4. The housing is a vertically arranged rectangular housing structure, and the bottom and one adjacent side of the housing are provided with an "L"-shaped rotating groove 5. The positioning plate is a large fan-shaped structure with a side surface greater than 180 degrees. A first rotating shaft 6 is rotatably inserted into the center of the positioning plate. The two sides of the first rotating shaft are inserted into and fixed on the shaft seat 7. The shaft seat is fixed on both sides of the vertical section of the rotating groove. One side of the positioning plate rotates in the rotating groove. A plate seat 8 is installed on the outer side of the positioning plate. The wheel seat is installed on the plate seat. The polyurethane wheel 3 is installed on the wheel seat. The positioning plate below the plate seat is provided with a lower positioning hole 9. The other side of the lower positioning hole on the positioning plate is provided with an upper positioning hole 10. A pluggable pin 11 is provided on the lower side of the rotating groove at a position corresponding to the movement path of the upper and lower positioning holes. When the polyurethane wheel is bent upward and folded up, the pin is inserted into the upper positioning hole for limiting.

[0018] An arc-shaped concave shell 12 is provided on the upper part of the housing near the polyurethane wheel. When the polyurethane wheel is bent upwards and folded up, one side of the polyurethane wheel is inserted into the concave shell.

[0019] A second rotating shaft 13 is fixedly disposed in the middle of the plate base. The end of the second rotating shaft is threaded. A bearing assembly 14 is fitted onto the second rotating shaft with an interference fit. The outer ring of the bearing assembly is inserted into the wheel seat. The threaded end of the second rotating shaft passes through the wheel seat and is limited by a nut. A wheel axle 22 is disposed at the upper end of the wheel seat. The polyurethane wheel is limited to rotating on the wheel axle.

[0020] A pin seat 15 is provided on the lower inner side of the housing and at the corresponding position of the rotating groove. A pin sleeve 16 is provided on the outer side of the housing at the corresponding position of the pin seat. The pin sleeve, the side of the housing, and the pin seat are fixed by bolts arranged in a circular array. A telescopic hole 17 with a diameter smaller than its inner cavity is provided on one side of the pin sleeve. The pin sleeve completely penetrates the side of the housing and the pin seat. An opening with the same diameter as the penetration hole is provided on the side of the housing and the pin seat at the corresponding position. A pin 11 is provided inside the pin sleeve. A telescopic rod 18 matching the telescopic hole is provided on one side of the pin. One end of the telescopic rod passes through the telescopic hole and is fixedly connected to the handle 19. A spring 20 is sleeved on the outer ring of the telescopic rod inside the pin seat. Under normal conditions, the end of the pin is inserted into the pin seat and limits the upper positioning hole and the lower positioning hole.

[0021] A cover plate 21 is provided on the side of the housing away from the wheel seat.

[0022] When the folding wheels need to be lowered, grasp the handle and pull out the pin. As the folding wheels rotate to the lower end, the pin, under the action of the spring force, inserts into the pin holder and the positioning plate hole, securing the folding wheels to prevent them from falling off. When the folding wheels need to be folded up, the same operation applies. The function of the bearing assembly is to bear the weight of the product while ensuring the smooth rotation of the folding wheels.

[0023] 1) The housing is made of 3mm thick Q235A high-quality carbon structural steel, CNC cut and laser welded. After welding, all holes and slots are CNC machined. The housing surface is treated with black zinc plating. The housing is equipped with parts such as pin seats, pin sleeves, recessed shells, pin seats, and cover plates. The housing is connected to the support carriage with 5 M8×35 bolts, which are tightened with lock nuts.

[0024] 2) The cover plate and recess are made of 1.5mm thick Q235A high-quality carbon structural steel. The recess is assembled and welded. When the folding wheels are folded up, part of the polyurethane wheels can be retracted into the recess. After welding, all surfaces are treated with black zinc plating. (See...) Figure 1 ).

[0025] 3) The wheel seat is welded to the pre-machined ear fork. After welding, the wheel axle mounting hole is machined. The technical requirements are coaxiality ±0.015mm and hole tolerance φ20H9.

[0026] 4) The pins, pin sleeves, axles, pin seats, shafts, and handles are all made of 40Cr alloy structural steel and undergo quenching and tempering heat treatment to give them good comprehensive mechanical properties. After processing, they are galvanized for corrosion protection.

[0027] 5) The compression springs are made of 50CrVA alloy spring steel, which has good toughness, proportional limit, and tensile strength. After processing, the surface is galvanized for corrosion protection.

[0028] 6) The positioning plate and plate base are made of high-quality Q235A carbon structural steel, and are welded together after processing. The perpendicularity of the center line of the hole in the positioning plate and plate base is required to be ±0.25mm. The plate base is designed with a welding positioning groove to facilitate accurate positioning when welding with the positioning plate.

[0029] 7) The bearing assembly consists of domestically produced standard parts such as deep groove bearings, thrust ball bearings, and round nuts. Its function is to bear the weight of the product and ensure the flexibility of the support vehicle's movement.

[0030] 8) Based on the weight of the product and the supporting frame, we selected domestically produced polyurethane wheels with a diameter of 200mm and a load-bearing capacity of 300kg. Polyurethane wheels have advantages such as strong wear resistance, good load-bearing capacity, and high tear resistance.

[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A novel folding wheel device, characterized in that: The system includes a positioning plate (1), a wheel seat (2), a polyurethane wheel (3), and a housing (4). The housing is a vertically arranged rectangular housing structure. The bottom of the housing and one adjacent side are provided with an "L"-shaped rotating groove (5). The positioning plate is a large fan-shaped structure with a side surface greater than 180 degrees. The center of the positioning plate is rotatably inserted with a first rotating shaft (6). The two sides of the first rotating shaft are inserted into and fixed on a shaft seat (7). The shaft seat is fixed on both sides of the vertical section of the rotating groove. One side of the positioning plate rotates in the rotating groove. A plate seat (8) is installed on the outer side of the positioning plate. A wheel seat is installed on the plate seat. A polyurethane wheel (3) is installed on the wheel seat. The positioning plate below the plate seat is provided with a lower positioning hole (9). The other side of the lower positioning hole on the positioning plate is provided with an upper positioning hole (10). A pluggable pin (11) is provided on the lower side of the rotating groove at a position corresponding to the movement path of the upper and lower positioning holes. When the polyurethane wheel is bent upward and retracted, the pin is inserted into the upper positioning hole for a limit.

2. The novel folding wheel device according to claim 1, characterized in that: An arc-shaped concave shell (12) is provided on the upper side of the housing near the polyurethane wheel. When the polyurethane wheel is bent upwards and folded up, one side of the polyurethane wheel is inserted into the concave shell.

3. The novel folding wheel device according to claim 1, characterized in that: A second rotating shaft (13) is fixedly provided in the middle of the plate base. The end of the second rotating shaft is provided with a thread. The second rotating shaft is fitted with a bearing assembly (14) with an interference fit. The outer ring of the bearing assembly is inserted into the wheel seat. The threaded end of the second rotating shaft passes through the wheel seat and is limited by a nut. A wheel axle (22) is provided at the upper end of the wheel seat. The polyurethane wheel is limited to rotating on the wheel axle.

4. The novel folding wheel device according to claim 1, characterized in that: A pin seat (15) is provided on the lower inner side of the housing and at the corresponding position of the rotating groove. A pin sleeve (16) is provided on the outer side of the housing at the corresponding position of the pin seat. The pin sleeve, the side of the housing and the pin seat are fixed by bolts arranged in a circular array. A telescopic hole (17) with a diameter smaller than its inner cavity is provided on one side of the pin sleeve. The pin sleeve is completely connected to the side of the housing and the pin seat. An opening with the same diameter as the through hole is provided on the side of the housing and the pin seat at the corresponding position. A pin (11) is provided inside the pin sleeve. A telescopic rod (18) matching the telescopic hole is provided on one side of the pin. One end of the telescopic rod passes through the telescopic hole and is fixedly connected to the handle (19). A spring (20) is provided on the outer ring of the telescopic rod inside the pin seat. Under normal conditions, the end of the pin is inserted into the pin seat and limits the upper positioning hole and the lower positioning hole.

5. A novel folding wheel device according to claim 1, characterized in that: A cover plate (21) is provided on the side of the housing away from the wheel seat.

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