Anti-degumming polyurethane roller, transmission device and mobile chassis

Abstract

The utility model relates to an idler wheel, in particular to an anti-degumming polyurethane idler wheel, a transmission device and a movable chassis, which comprise an idler wheel base body and a polyurethane adhesive layer, a dovetail groove is formed in the outer surface of the roller base body in the circumferential direction, and a limiting hole is formed in the bottom of the dovetail groove; the inner surface of the polyurethane rubber layer is provided with a dovetail joint in mortise and tenon connection with the dovetail groove, and the top of the dovetail joint is provided with a limiting protrusion matched with the limiting hole. Compared with the prior art, the problem that in the prior art, a polyurethane adhesive layer is prone to degumming after being used for a long time, and consequently the function of the polyurethane adhesive layer is invalid is solved, reliable combination between the polyurethane adhesive layer and the roller base body is achieved, and stable combination can still be kept through the structural design after being used for a long time.

Description

Technical Field

[0001] This utility model relates to a roller, specifically to an anti-adhesion polyurethane roller, a transmission device, and a mobile chassis. Background Technology

[0002] Polyurethane rollers possess a variety of excellent properties and a wide range of applications. They feature high strength, high wear resistance, oil resistance, chemical corrosion resistance, and vibration absorption, making them widely used in medical equipment (such as operating tables and wheelchairs), transportation equipment (such as transport vehicles, shelves, and pallet trucks), machinery (such as workbenches, conveyor belts, and production lines), furniture (such as sofas, office chairs, and beds), and electronic equipment (such as server racks and computer chairs).

[0003] The existing structure of polyurethane rollers, such as Figure 1 As shown, only a ring of polyurethane adhesive is tightly bonded to the outer surface of the roller base. However, after long-term use, polyurethane rollers with this structure often experience slippage and displacement between the polyurethane adhesive and the roller base, causing the polyurethane roller to fail to perform its function and requiring replacement.

[0004] Existing technology CN209305232U discloses a polyurethane roller, including a hub, a polyurethane sleeve fitted on the outside of the hub, a fixing ring on the inner front side of the hub, a mounting hole on the front surface of the fixing ring, a shaft hole on the inner side of the fixing ring, and a limiting groove on the inner surface of the shaft hole near the top. The outer surface of the polyurethane sleeve has several first grooves. This design further adds axially oriented protrusions to the outer surface of the roller base (hub) to cooperate with the second grooves on the inner side of the polyurethane adhesive layer (polyurethane sleeve) to improve the bonding force between the two. However, due to the thickness limitation of the polyurethane adhesive layer, the protrusion structure cannot be made large, resulting in a relatively poor actual bonding improvement effect. Secondly, during and after long-term use, the outer polyurethane adhesive layer inevitably deforms or partially deforms under heat and external pressure, causing the polyurethane adhesive layer to detach from the roller base and form a gap, rendering the protrusions on the roller base ineffective.

[0005] Therefore, in order to ensure the long-term reliability of polyurethane rollers and their adaptability to use in various environments, it is necessary to propose a new polyurethane roller structure to ensure the bonding strength between the roller matrix and the polyurethane adhesive layer. Utility Model Content

[0006] The purpose of this utility model is to provide a polyurethane roller, transmission device and mobile chassis that prevents delamination in order to solve at least one of the above problems. This solves the problem that the polyurethane adhesive layer is prone to delamination after long-term use, which leads to its functional failure. This solution achieves a reliable bond between the polyurethane adhesive layer and the roller substrate, and can still maintain a stable bond through structural design after long-term use.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] The first aspect of this utility model discloses a polyurethane roller that prevents delamination, comprising a roller substrate and a polyurethane adhesive layer;

[0009] The outer surface of the roller base is provided with a dovetail groove along the circumference, and a limit hole is provided at the bottom of the dovetail groove;

[0010] The inner surface of the polyurethane adhesive layer is provided with a dovetail tenon that connects with the dovetail groove tenon, and the top of the dovetail tenon is provided with a limiting protrusion that mates with the limiting hole.

[0011] Preferably, the limiting holes are spaced apart circumferentially along the dovetail groove, and the limiting protrusions are spaced apart circumferentially along the dovetail tenon corresponding to the limiting holes.

[0012] Preferably, the limiting hole is located at the axial center of the dovetail groove, and the limiting protrusion is located at the axial center of the dovetail tenon.

[0013] Preferably, the limiting hole is a blind hole, and the depth of the limiting hole is not less than one-third of the long side of the dovetail groove.

[0014] Preferably, the limiting hole is a cross-shaped, wood-shaped, or rice-shaped opening.

[0015] Preferably, the inner wall surface of the limiting hole is provided with an anti-slip structure and / or an anti-pull-out structure.

[0016] Preferably, several dovetail grooves are arranged parallel to each other along the axial direction of the roller base, and several dovetail tenons are arranged parallel to each other along the axial direction of the polyurethane adhesive layer, corresponding to the dovetail grooves.

[0017] Preferably, the dovetail tenon has a tenon angle of 75-80°.

[0018] The second aspect of this utility model discloses a transmission device, including any of the polyurethane rollers described above, which can be used as pulleys, transmission wheels, or other devices requiring force transmission, such as production lines and conveyor belts.

[0019] The third aspect of this utility model discloses a mobile chassis, including polyurethane rollers as described above, such as drive wheels, guide wheels, etc., used in devices that need to move, such as trolleys.

[0020] The working principle of this utility model is as follows:

[0021] The mortise and tenon structure design of the dovetail groove and dovetail tenon, along with the matching of the limiting hole in the dovetail groove and the limiting protrusion on the dovetail tenon, effectively increases the bonding area, thereby increasing the bonding strength.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The dovetail groove and dovetail tenon structure design increases the bonding area between the roller base and the polyurethane adhesive layer, and the tenon and mortise connection between the two can achieve structural locking, effectively strengthening the bonding strength between the two and fully avoiding the possibility of axial displacement.

[0024] The limiting holes in the dovetail groove and the corresponding limiting protrusions on the dovetail tenon further limit the circumferential movement between the roller base and the polyurethane adhesive layer, preventing circumferential slippage of the polyurethane adhesive layer; the spaced holes can fully cope with pressure from different directions, ensuring a reliable connection during use.

[0025] Because the grooves and holes are made in the roller substrate, it has a large space, which can overcome the bonding problem caused by the deformation of the polyurethane adhesive layer during the pressure process.

[0026] The polyurethane roller with this structure can effectively prevent circumferential and axial slippage and delamination between the polyurethane adhesive layer and the roller substrate, thereby increasing the service life of the polyurethane roller by at least 50%. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a polyurethane roller in the prior art;

[0028] Figure 2 This is a partial sectional view of the polyurethane roller in this design.

[0029] Figure 3 This is a schematic diagram of the structure of the roller matrix in the polyurethane roller of this solution;

[0030] In the diagram: 1-roller base; 2-polyurethane adhesive layer; 3-dovetail groove; 4-dovetail tenon; 5-limiting hole; 6-limiting protrusion. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 As shown, this is a conventional polyurethane roller in the prior art (commercially available), which has only a polyurethane adhesive layer 2 bonded to the outer surface of the roller base 1. After long-term use, the adhesive strength of this structure is insufficient, causing the polyurethane adhesive layer 2 to slip on the roller base 1 and thus failing to perform its function properly.

[0033] Example 1

[0034] A type of anti-detachment polyurethane roller, such as Figure 2 , 3 As shown, it includes a roller substrate 1 and a polyurethane adhesive layer 2;

[0035] The outer surface of the roller base 1 is provided with a dovetail groove 3 along the circumferential direction, and a limiting hole 5 is provided at the bottom of the dovetail groove 3;

[0036] The inner surface of the polyurethane adhesive layer 2 is provided with a dovetail tenon 4 that is mortised and tenoned with the dovetail groove 3, and the top of the dovetail tenon 4 is provided with a limiting protrusion 6 that cooperates with the limiting hole 5.

[0037] More specifically, in this embodiment:

[0038] In this polyurethane roller: a dovetail groove 3 is provided circumferentially on the outer surface of the roller base 1, and a dovetail tenon 4 matching the dovetail groove 3 is provided circumferentially on the inner side of the polyurethane adhesive layer 2. The mortise and tenon connection formed between the dovetail groove 3 and the dovetail tenon 4 not only increases the bonding area between the polyurethane adhesive layer 2 and the roller base 1, but also enables the polyurethane adhesive layer 2 and the roller base 1 to achieve a reliable structural bond and axial positioning of the polyurethane adhesive layer 2.

[0039] Depending on the actual structural requirements, the dovetail groove 3 can be located only at the axial center of the roller base 1, or several parallel grooves can be spaced out (equal or unequal intervals). In this embodiment, as shown... Figure 2 , 3 As shown, a dovetail groove 3 is provided only at the axial center position of the roller base 1, and correspondingly, a dovetail tenon 4 is provided only at the axial center position of the polyurethane adhesive layer 2.

[0040] The dovetail tenon 4 has a tenon cheek inclination angle of 75-80° to ensure a reliable connection between the two.

[0041] In this polyurethane roller: limiting holes 5 are evenly spaced circumferentially at the bottom center of the dovetail groove 3, typically 8-20 in number; in this embodiment, 12 are evenly spaced. Correspondingly, limiting protrusions 6 are evenly spaced circumferentially at the top center of the dovetail tenon 4, corresponding to the number, position, size, and structure of the limiting holes 5. The limiting protrusions 6 are inserted into the limiting holes 5 to achieve circumferential limiting of the polyurethane adhesive layer 2.

[0042] The limiting hole 5 is located at the axial center of the bottom of the dovetail groove 3, which makes the force more uniform. The limiting hole 5 adopts a blind hole structure, and the blind hole can be designed as a cross structure, a wooden character structure or a rice character structure to further enhance the bonding strength. Furthermore, the limiting hole 5 can also be provided with an anti-slip structure (such as anti-slip texture) and / or an anti-pull-out structure (such as a locking block / slot) to further limit the separation of the polyurethane adhesive layer 2 from the surface of the roller substrate 1.

[0043] The depth of the limiting hole 5 needs to be no less than one-third of the long side of the dovetail groove 3 so that it can have sufficient bonding strength and deformation allowance after being combined with the limiting protrusion 6. When the adhesion between the polyurethane adhesive layer 2 and the roller substrate 1 is insufficient and it is deformed under pressure, the limiting protrusion 6 will not come out of the limiting hole 5.

[0044] By designing dovetail grooves 3 and dovetail tenons 4 with mortise and tenon structures, as well as corresponding limiting holes 5 and limiting protrusions 6 in the polyurethane roller, the polyurethane adhesive layer 2 and the roller substrate 1 can form effective circumferential and axial limiting, preventing slippage and failure between the two, thereby increasing the service life of the polyurethane roller by 50%.

[0045] Example 2

[0046] This embodiment discloses an elevator that uses the polyurethane rollers of Embodiment 1.

[0047] Example 3

[0048] This embodiment discloses a transplanter that uses the polyurethane rollers of Embodiment 1.

[0049] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A polyurethane roller with anti-detachment properties, characterized in that, It includes a roller substrate (1) and a polyurethane adhesive layer (2); The outer surface of the roller base (1) is provided with a dovetail groove (3) along the circumferential direction, and a limiting hole (5) is provided at the bottom of the dovetail groove (3); The inner surface of the polyurethane adhesive layer (2) is provided with a dovetail tenon (4) that is mortised and tenoned with the dovetail groove (3), and the top of the dovetail tenon (4) is provided with a limiting protrusion (6) that cooperates with the limiting hole (5).

2. The polyurethane roller for preventing delamination according to claim 1, characterized in that, The limiting holes (5) are provided in a plurality of spaced intervals along the dovetail groove (3), and the limiting protrusions (6) are provided in a plurality of spaced intervals along the dovetail tenon (4) corresponding to the limiting holes (5).

3. The polyurethane roller for preventing delamination according to claim 1, characterized in that, The limiting hole (5) is opened at the axial center of the dovetail groove (3), and the limiting protrusion (6) is set at the axial center of the dovetail tenon (4).

4. The polyurethane roller for preventing delamination according to claim 1, characterized in that, The limiting hole (5) is a blind hole, and the depth of the limiting hole (5) is not less than one-third of the long side of the dovetail groove (3).

5. The polyurethane roller for preventing delamination according to claim 1, characterized in that, The limiting hole (5) is a cross-shaped, wood-shaped, or rice-shaped opening.

6. The polyurethane roller for preventing delamination according to claim 1, characterized in that, The inner wall of the limiting hole (5) is provided with an anti-slip structure and / or an anti-pull-out structure.

7. The polyurethane roller for preventing delamination according to claim 1, characterized in that, The dovetail grooves (3) are arranged in parallel to each other along the axial direction of the roller base (1), and the dovetail tenons (4) are arranged in parallel to each other along the axial direction of the polyurethane adhesive layer (2) corresponding to the dovetail grooves (3).

8. The polyurethane roller for preventing delamination according to claim 1, characterized in that, The dovetail tenon (4) has a tenon angle of 75-80°.

9. A transmission device, characterized in that, Includes the polyurethane rollers as described in any one of claims 1-8.

10. A mobile chassis, characterized in that, Includes the polyurethane rollers as described in any one of claims 1-8.

Images