Idler wheel and trundle using same

Abstract

The utility model provides an idler wheel and a caster applying the idler wheel, the inner idler wheel is of a revolving body structure and comprises a grounding wheel of an elastic body and a supporting wheel embedded with the grounding wheel, the supporting wheel is provided with a convex tooth block, the grounding wheel is provided with a concave tooth groove, and the tooth block is inserted in the tooth groove. The outer convex tooth blocks of the supporting wheels are connected with the inner concave tooth grooves of the grounding wheels in an inserted mode, and therefore the overall structural stability of the rolling wheel is greatly improved. Compared with a traditional bonding connection mode, the embedded structure can better bear force and impact in various directions, and the problems that bonding between the outer wheel and the supporting wheel is not firm, and the outer wheel and the supporting wheel are prone to falling off are effectively solved. The trundle with the idler wheel has the advantages of being stable in structure, long in service life, high in carrying efficiency, high in safety and convenient to install and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of casters, in particular to a roller and a caster using the roller. Background Art

[0002] In the field of modern logistics and transportation, casters are an important part of mobile equipment. Their performance and durability play a vital role in improving handling efficiency and reducing costs. Casters move by rollers. Currently, the support wheels of the rollers and the outer wheels that contact the ground are mostly bonded. Although this connection method meets the basic movement needs to a certain extent, it exposes many problems in actual use.

[0003] Specifically, the support wheel and the outer wheel in a traditional caster are usually fixedly connected by adhesive. However, since the caster is frequently subjected to forces and impacts in various directions during use, these forces and impacts often cause the adhesive to fail, which in turn causes the problem of loose adhesion between the outer wheel and the support wheel. Over time, this loose adhesion phenomenon will gradually intensify, eventually causing the outer wheel to fall off, seriously affecting the service life and handling efficiency of the caster.

[0004] In summary, those skilled in the art are in urgent need of designing a roller for use on casters that has a stable structure, reliable performance, and a long service life. Utility Model Content

[0005] The utility model aims to provide a roller used on a caster, aiming to solve the technical problems in the prior art that the supporting wheel and the outer wheel are not firmly bonded and the outer wheel is easy to fall off, thereby greatly improving the service life and handling efficiency of the caster.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The utility model provides a roller which is mounted on a caster. The roller is a rotating body structure and comprises an elastic grounding wheel and a supporting wheel engaged with the grounding wheel. The supporting wheel is provided with an outwardly convex tooth block, the grounding wheel is provided with an inwardly concave tooth groove, and the tooth block is inserted in the tooth groove.

[0008] In a possible implementation, the tooth block has at least one piece, and the number of grooves of the tooth groove is the same as the number of pieces of the tooth block.

[0009] In a possible implementation, if there are two or more tooth blocks, the tooth blocks are evenly distributed along the circumference on the outer side of the support wheel.

[0010] In a possible implementation, the support wheel is located inside the ground contact wheel, the center axis of the support wheel coincides with the center axis of the ground contact wheel, and the outer wall of the support wheel is bonded to the inner wall of the ground contact wheel.

[0011] In a possible implementation, the ground contact wheel is made of natural rubber or synthetic rubber, and anti-slip grooves are provided on the ground contact wheel.

[0012] In a possible implementation, the support wheel is made of PP, ABS or PC by injection molding, and a mounting hole is formed in the support wheel, and a central axis of the mounting hole coincides with a central axis of the support wheel.

[0013] In a possible implementation manner, a bearing is installed in the mounting hole, and the number of the bearing is at least one.

[0014] In a possible implementation, the roller further includes a sealing cover, and the sealing cover is buckled on the outer end surface of the bearing.

[0015] In a possible implementation, the roller further includes a sleeve, the sleeve is installed in the axial hole of the bearing, and the central axis of the sleeve coincides with the central axis of the bearing.

[0016] The utility model also provides a caster, which comprises the above-mentioned roller and a bracket, and the bracket is connected to the roller through a pin shaft.

[0017] Compared with the prior art, the utility model provides a roller and a caster using the roller, wherein the inner roller is a rotating body structure, and includes an elastic grounding wheel, and a supporting wheel engaged with the grounding wheel, wherein the supporting wheel is provided with an outwardly convex tooth block, and the grounding wheel is provided with an inwardly concave tooth groove, and the tooth block is inserted into the tooth groove. The outwardly convex tooth block of the supporting wheel and the inwardly concave tooth groove of the grounding wheel are mutually engaged, thereby greatly enhancing the overall structural stability of the roller. Compared with the traditional method of only using adhesive connection, the interlocking structure can better withstand forces and impacts in various directions, and effectively solves the problem of loose adhesion and easy falling off between the outer wheel and the supporting wheel. The caster using the roller has the advantages of structural stability, long service life, high handling efficiency, high safety, and easy installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0019] Figure 1 is a schematic structural diagram of the roller in the first embodiment;

[0020] Figure 2 It is a front view of the roller in the first embodiment;

[0021] Figure 3 is a schematic structural diagram of the roller in the second embodiment;

[0022] Figure 4 This is a front view of the roller in the second embodiment;

[0023] Legend: 1- ground wheel; 11- tooth groove; 2- support wheel; 21- tooth block; 4- sealing cover; 5- casing. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. In addition, for the convenience of description below, the "upper", "lower", "left", and "right" quoted are equal to the upper, lower, left, and right directions of the drawings themselves. The "first", "second", etc. in the following are distinguished for the description and have no other special meanings.

[0025] In view of the problems existing in the prior art, the utility model provides a roller which is installed on a caster. The roller is a rotating body structure and includes an elastic grounding wheel and a supporting wheel engaged with the grounding wheel. The supporting wheel is provided with an outwardly convex tooth block, and the grounding wheel is provided with an inwardly concave tooth groove, in which the tooth block is inserted.

[0026] In specific application scenarios, the outer convex tooth blocks of the supporting wheel and the inner concave tooth grooves of the grounding wheel are plugged into each other, which greatly enhances the overall structural stability of the roller and effectively solves the problem of loose adhesion and easy falling off between the outer wheel and the supporting wheel.

[0027] Furthermore, the interlocking structure between the ground wheel and the support wheel enables the roller to maintain a stable connection state when subjected to frequent impacts and loads, and is not prone to loosening or falling off. This not only increases the service life of the roller, but also extends the overall service life of the caster, reduces the replacement frequency, and thus reduces the maintenance and replacement costs.

[0028] In some examples, there is at least one tooth block, and the number of grooves of the tooth groove is the same as the number of pieces of the tooth block. If there are two or more tooth blocks, the tooth blocks are evenly distributed on the outer side of the support wheel along the circumference.

[0029] In a specific application scenario, when the number of tooth blocks and tooth grooves is equal, and the tooth blocks are evenly distributed along the outer circumference of the support wheel, first of all, it ensures that the connection between the grounding wheel and the support wheel is more uniform and stable, avoiding damage or falling off caused by excessive force at a single point, thereby improving the overall structural stability of the roller.

[0030] Secondly, increasing the number of tooth blocks and tooth grooves and distributing them evenly significantly improves the connection strength, because more connection points mean a larger contact area and stronger bonding force, so the roller can withstand greater external forces and impacts. In addition, since the contact between the tooth blocks and tooth grooves is more uniform and stable, the wear and noise generated by the roller during rotation are also reduced, extending the service life of the roller while improving comfort and safety during use.

[0031] In some examples, the support wheel is located inside the ground contact wheel, the center axis of the support wheel coincides with the center axis of the ground contact wheel, and the outer wall of the support wheel is bonded to the inner wall of the ground contact wheel.

[0032] In a specific application scenario, the central axis of the supporting wheel coincides with the central axis of the grounding wheel, ensuring the smoothness and stability of the roller during rotation and avoiding vibration and shaking caused by axis deviation.

[0033] Furthermore, the outer wall of the supporting wheel is bonded and connected to the inner wall of the grounding wheel, which further strengthens the overall structural strength of the roller, so that the supporting wheel and the grounding wheel form a tight whole that can withstand greater external forces and impacts, thereby increasing the service life of the roller.

[0034] In some examples, the ground contact wheel is made of natural rubber or synthetic rubber, and has anti-slip grooves.

[0035] In specific application scenarios, the ground contact wheel is made of synthetic rubber. Synthetic rubber (TPE) has undergone specific chemical treatment, has a stable molecular structure, and is resistant to oil and high temperatures. It can maintain excellent physical properties in high temperature environments and is not easily softened or deformed, especially in high temperature working environments. It can maintain stable performance, thereby increasing its service life.

[0036] At the same time, the synthetic rubber can still maintain good elasticity and flexibility in low temperature environments, so that the ground contact wheel can maintain functionality in cold areas or low temperature environments, ensuring the normal operation of mobile equipment.

[0037] In addition, synthetic rubber has excellent wear resistance. By adjusting the formula and process, its wear resistance is higher than that of natural rubber. It can better resist friction and wear caused by long-term use and extend its service life.

[0038] Furthermore, the material of the grounding wheel can be not only natural rubber or synthetic rubber, but also other materials. While ensuring that the working performance of the roller is not affected, technical personnel in this field can select the material of the grounding wheel according to actual needs. Changes in the material of the grounding wheel do not affect the protection scope of this application.

[0039] Furthermore, the anti-skid pattern design can effectively increase the contact area between the ground-contacting wheels and the ground, thereby enhancing the grip. It prevents the vehicle from slipping when driving, turning or braking, and improves driving safety and stability.

[0040] In some examples, the support wheel is made of PP, ABS or PC by injection molding, and a mounting hole is opened in the support wheel, and the central axis of the mounting hole coincides with the central axis of the support wheel.

[0041] In specific application scenarios, the material of the support wheel can be not only PP, ABS or PC, but also other materials. While ensuring that the working performance of the roller is not affected, technical personnel in this field can select the material of the support wheel according to actual needs. Changes in the material of the support wheel do not affect the protection scope of this application.

[0042] Furthermore, the central axis of the mounting hole coincides with the central axis of the supporting wheel, thereby ensuring the stability and stability of the roller during rotation and avoiding vibration and shaking caused by axis deviation.

[0043] In some examples, a bearing is installed in the mounting hole, and the number of the bearing is at least one.

[0044] In a specific application scenario, there are two bearings, one at the left and one at the right ends of the support wheel, so that the roller can slide smoothly and bear heavy loads.

[0045] In some examples, the roller further includes a sealing cover which is buckled onto an outer end surface of the bearing.

[0046] In specific application scenarios, the sealing cover in the roller is buckled on the outer end surface of the bearing, which has the effect of preventing external impurities from invading, preventing lubricant leakage, enhancing the integrity of the structure, reducing maintenance costs and improving roller performance.

[0047] In some examples, the roller further includes a sleeve, which is installed in the axial hole of the bearing, and the central axis of the sleeve coincides with the central axis of the bearing.

[0048] In specific application scenarios, the material of the sleeve is a galvanized thickened iron pipe, and the design of the sleeve coinciding with the center axis of the bearing can significantly improve the support and protection capabilities, rotation stability, corrosion resistance, and installation and maintainability of the roller, so that it can adapt to the needs of various working environments and improve the service life and work efficiency of the roller.

[0049] The utility model also provides a caster, which comprises the above-mentioned roller and a bracket, and the bracket is connected with the roller through a pin shaft.

[0050] In a specific application scenario, the caster not only includes a roller and a bracket, but also includes fasteners, etc. Since the fasteners are all existing technologies, this application will not go into details here. Embodiment 1

[0051] Based on the above concept, Figure 1-2 As shown, the present embodiment provides a roller for a specific application scenario, such as Figure 1 As shown, the roller is installed on the caster, the roller is a rotating body structure, and includes an elastic grounding wheel 1, and a supporting wheel 2 embedded with the grounding wheel 1, the supporting wheel 2 is provided with a convex tooth block 21, the grounding wheel 1 is provided with a concave tooth groove 11, and the tooth block 21 is inserted into the tooth groove 11.

[0052] In the example, Figure 2 As shown, there are 16 tooth blocks 21 , the number of grooves in the tooth grooves 11 is the same as the number of tooth blocks 21 , and the tooth blocks 21 are evenly distributed on the outer side of the support wheel 2 along the circumference.

[0053] In the example, Figure 1 As shown, the support wheel 2 is located inside the ground-engaging wheel 1 , the center axis of the support wheel 2 coincides with the center axis of the ground-engaging wheel 1 , and the outer wall of the support wheel 2 is bonded to the inner wall of the ground-engaging wheel 1 .

[0054] In the example, the ground-engaging wheel 1 is made of synthetic rubber, and anti-skid grooves are provided on the ground-engaging wheel 1 .

[0055] In the example, the support wheel 2 is made of PP injection molding, and a mounting hole is opened in the support wheel 2 , and the central axis of the mounting hole coincides with the central axis of the support wheel 2 .

[0056] In the example, two bearings are installed in the mounting hole.

[0057] In the example, Figure 1 As shown, the roller further comprises a sealing cover 4, which is buckled on the outer end surface of the bearing.

[0058] In the example, Figure 1 As shown, the roller further includes a sleeve 5, which is installed in the axial hole of the bearing, and the central axis of the sleeve 5 coincides with the central axis of the bearing. Embodiment 2

[0059] Based on the above concept, Figure 3-4 As shown, the present embodiment provides a roller for a specific application scenario, such as Figure 3As shown, the roller is installed on the caster, the roller is a rotating body structure, and includes an elastic grounding wheel 1, and a supporting wheel 2 embedded with the grounding wheel 1, the supporting wheel 2 is provided with a convex tooth block 21, the grounding wheel 1 is provided with a concave tooth groove 11, and the tooth block 21 is inserted into the tooth groove 11.

[0060] In the example, Figure 4 As shown, there are 10 tooth blocks 21 , the number of grooves in the tooth grooves 11 is the same as the number of tooth blocks 21 , and the tooth blocks 21 are evenly distributed on the outer side of the support wheel 2 along the circumference.

[0061] In the example, Figure 4 As shown, the support wheel 2 is located inside the ground-engaging wheel 1 , the center axis of the support wheel 2 coincides with the center axis of the ground-engaging wheel 1 , and the outer wall of the support wheel 2 is bonded to the inner wall of the ground-engaging wheel 1 .

[0062] In the example, the ground-engaging wheel 1 is made of synthetic rubber, and anti-skid grooves are provided on the ground-engaging wheel 1 .

[0063] In the example, the support wheel 2 is made of PP injection molding, and a mounting hole is opened in the support wheel 2, and the central axis of the mounting hole coincides with the central axis of the support wheel 2.

[0064] In the example, two bearings are installed in the mounting hole.

[0065] In the example, Figure 3 As shown, the roller further comprises a sealing cover 4, which is buckled on the outer end surface of the bearing.

[0066] In the example, Figure 4 As shown, the roller further includes a sleeve 5, which is installed in the axial hole of the bearing, and the central axis of the sleeve 5 coincides with the central axis of the bearing.

[0067] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A roller mounted on a caster, characterized in that: The roller is a rotating body structure, and comprises an elastic grounding wheel (1), and a supporting wheel (2) engaged with the grounding wheel (1), the supporting wheel (2) being provided with an outwardly convex tooth block (21), the grounding wheel (1) being provided with an inwardly concave tooth groove (11), and the tooth block (21) being inserted into the tooth groove (11).

2. A roller as claimed in claim 1, characterized in that: The tooth block (21) has at least one piece, and the number of grooves in the tooth groove (11) is the same as the number of pieces in the tooth block (21).

3. A roller as claimed in claim 2, characterized in that: If there are two or more tooth blocks (21), the tooth blocks (21) are evenly distributed along the circumference on the outside of the support wheel (2).

4. A roller as claimed in claim 1, characterized in that: The support wheel (2) is located on the inner side of the ground contact wheel (1), the central axis of the support wheel (2) coincides with the central axis of the ground contact wheel (1), and the outer wall of the support wheel (2) is bonded to the inner wall of the ground contact wheel (1).

5. A roller as claimed in claim 1, characterized in that: The ground contact wheel (1) is made of natural rubber or synthetic rubber, and is provided with anti-slip grooves.

6. A roller as claimed in claim 1, characterized in that: The support wheel (2) is made of PP, ABS or PC by injection molding, and the support wheel (2) is provided with a mounting hole, wherein the central axis of the mounting hole coincides with the central axis of the support wheel (2).

7. A roller as claimed in claim 6, characterized in that: A bearing is installed in the installation hole, and the number of the bearing is at least one.

8. A roller as claimed in claim 7, characterized in that: The roller further comprises a sealing cover (4), wherein the sealing cover (4) is buckled onto the outer end surface of the bearing.

9. A roller as claimed in claim 8, characterized in that: The roller further comprises a sleeve (5), wherein the sleeve (5) is mounted in the shaft hole of the bearing, and the central axis of the sleeve (5) coincides with the central axis of the bearing.

10. A caster, characterized in that: The caster comprises the roller described in any one of claims 1-9, and further comprises a bracket, wherein the bracket is connected to the roller via a pin.

Images