Japanese-type heavy universal PU (polyurethane) trundle

Abstract

The invention discloses a Japanese type heavy universal PU trundle which comprises a trundle frame. The rollers are rotationally arranged at the bottoms of the trundle frames; the mounting disc is rotationally arranged at the top of the trundle frame; the brake mechanism comprises a positioning frame, an unlocking piece, a locking piece and a brake piece, the positioning frame is positioned at the front end of the trundle frame, the unlocking piece and the locking piece are rotationally connected to the positioning frame, a second side plate of the unlocking piece is provided with a reset guide groove, the reset guide groove is communicated with a brake groove in the side face, and a third rotating shaft on the locking piece is slidably arranged between the reset guide groove and the brake groove. The brake piece is positioned at the bottom of the locking piece, and a reset assembly is arranged among the positioning frame, the unlocking piece and the locking piece. By means of the trundle braking mechanism, the problems that when an existing trundle braking mechanism is locked and unlocked, the movement resistance of an internal structure is large, the jamming condition exists, the structural stability is insufficient during braking, the braking quality is poor, and the existing trundle braking mechanism cannot be suitable for a heavy trundle can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of casters, in particular to a Japanese-style heavy-duty universal PU caster. Background Art

[0002] In order to ensure the stability of the entire process of picking up and placing goods on the transport cart, the caster generally has a brake mechanism designed for the bottom roller. However, the brake mechanism of existing casters has large resistance to movement in the internal structure during locking and unlocking operations, which may cause jamming. In addition, the structural stability is insufficient during braking, resulting in poor braking quality, and it is not suitable for heavy-duty casters. Summary of the invention

[0003] The purpose of the present invention is to provide a Japanese heavy-duty universal PU caster to solve the problems that the braking mechanism of the existing casters has large resistance to movement of the internal structure during locking and unlocking operations, resulting in jamming, and insufficient structural stability during braking, resulting in poor braking quality and being unsuitable for heavy-duty casters.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: a Japanese heavy-duty universal PU caster, comprising:

[0005] Caster frame;

[0006] A roller, which is rotatably arranged at the bottom of the caster frame;

[0007] A mounting plate rotatably disposed on the top of the caster frame;

[0008] The brake mechanism includes a positioning frame, an unlocking member, a locking member and a brake member. The positioning frame is positioned at the front end of the caster frame. The unlocking member and the locking member are respectively rotatably connected to the positioning frame. A reset guide groove is arranged on the second side plate of the unlocking member. The reset guide groove is connected to the brake groove on the side. The third rotating shaft on the locking member is slidably arranged between the reset guide groove and the brake groove. The brake member is positioned at the bottom of the locking member. A reset assembly is arranged between the positioning frame, the unlocking member and the locking member.

[0009] As a further description of the above technical solution:

[0010] The roller is rotatably connected to the caster frame via a connecting shaft, a ball bearing is arranged between the roller and the connecting shaft, the bottom of the mounting plate is inserted or sleeved and positioned on the top edge of the caster frame, and the ball bearing is arranged between the two.

[0011] As a further description of the above technical solution:

[0012] A first support plate is arranged behind the positioning frame, and the first support plate abuts against the U-shaped door frame at the front end of the caster frame. An L-shaped positioning plate extends outward from the rear side of the positioning frame, and the L-shaped positioning plate is sleeved on the U-shaped door frame and positioned by bolts.

[0013] As a further description of the above technical solution:

[0014] A first rotating shaft is arranged between the first side plates on both sides of the positioning frame, and the first rotating shaft is passed through the rear end through hole of the third side plate of the locking member. A C-type kit is arranged on the top of the brake member, and the C-type kit is sleeved and positioned on the first rotating shaft and the third rotating shaft. A second rotating shaft is also arranged between the two first side plates, and the second rotating shaft is passed through the rear side through hole of the second side plate.

[0015] As a further description of the above technical solution:

[0016] The reset assembly is provided with multiple torsion springs, the middle part of the torsion spring can be rotatably sleeved on the second rotating shaft, and the side surface of the middle part is positioned on the inner wall of the second side plate, the first end of the torsion spring abuts against the first top plate and the inner wall of the second support plate of the positioning frame, the second support plate is extended laterally from the front end of the first top plate, and an avoidance notch corresponding to the first end is provided on the rear side of the unlocking member top plate, and the second end of the torsion spring abuts against the top of the rear end of the locking member.

[0017] As a further description of the above technical solution:

[0018] A communication port is arranged on the second top plate of the locking member, the unlocking member is rotatably arranged in the communication port, a third support plate extends downwardly from the rear side of the communication port, and the third support plate abuts against the top of the brake member.

[0019] As a further description of the above technical solution:

[0020] The reset guide groove and the brake stop groove are T-shaped structures obliquely arranged on the second side plate.

[0021] As a further description of the above technical solution:

[0022] The brake member is a multi-sided pyramid structure with a narrow surface facing downwards, and brake teeth are arranged on the narrow surface.

[0023] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0024] 1. This caster is a Japanese heavy-duty universal caster. The main components are made of PU material. By rotating the unlocking piece and the locking piece set on the positioning frame and cooperating with the reset component, a brake mechanism for the brake part to brake and switch the mobile state is formed. Press the locking piece down so that the third shaft is pressed into the brake groove along the reset guide groove. The triangular structure of the three shafts cooperates with the pre-tightening effect of the reset component to achieve the locking of the brake mechanism. The brake part is stably abutted on the roller to achieve the brake stop of the caster, ensuring the brake stop quality of the heavy-duty caster; when it is necessary to switch to the mobile state, press the unlocking piece down so that the third shaft is out of the brake groove. Under the elastic reset action of the reset component, the locking piece is initially rotated and reset. After that, the unlocking piece is released, and the overall structure can be reset under the drive of the reset component. The locking and unlocking operation resistance and impact are small, the structure is not easy to get stuck, and it is easy to use.

[0025] 2. The brake member is assembled on the locking member through a C-type kit, which can realize the movable assembly of the brake member on the locking member. During the pressing down of the locking member, the brake member will first abut against the roller. Continuing to press down will cause the C-type kit to deform, thereby reducing the impact on the operator when the pressing down operation is completed, and through the elastic pre-tightening effect during the structural deformation, the brake member is always tightly abutted against the roller, achieving a stable and high-strength braking effect; the reset guide groove and the brake stop groove are T-shaped structures obliquely arranged on the second side panel, so that after pressing and releasing the unlocking member, the unlocking member can synchronously drive the locking member to rotate and reset under the reset effect of the torsion spring elastic force, thereby improving the unlocking efficiency of the caster; the brake member is a multi-prism structure with its narrow side facing downward and brake teeth arranged on the narrow side. The above design can reduce the vibration and pressure transmitted from the roller and the brake member to the brake mechanism when the caster is braked, avoid structural loosening, and improve the braking quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a structural diagram of a Japanese heavy-duty universal PU caster.

[0028] Figure 2 This is a disassembly diagram of a Japanese heavy-duty universal PU caster.

[0029] Figure 3 This is a cross-sectional view of the brake mechanism in a Japanese heavy-duty universal PU caster.

[0030] Figure 4 Disassembly of the brake mechanism of a Japanese heavy-duty universal PU caster Figure 1 .

[0031] Figure 5 Disassembly of the brake mechanism of a Japanese heavy-duty universal PU caster Figure 2 .

[0032] Legend:

[0033] 1. caster frame; 11. connecting shaft; 12. U-shaped door frame; 2. roller; 21. ball bearing; 3. mounting plate; 4. positioning frame; 40. first rotating shaft; 41. first top plate; 42. first side plate; 43. first supporting plate; 44. L-shaped positioning plate; 45. second supporting plate; 5. unlocking member; 50. second rotating shaft; 51. second side plate; 52. reset guide groove; 53. brake stop groove; 54. avoidance gap; 6. locking member; 60. third rotating shaft; 61. second top plate; 62. connecting port; 63. third side plate; 64. third supporting plate; 7. brake member; 71. C-type kit; 72. brake tooth; 8. reset assembly; 81. first end; 82. second end. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figure 1-5 The present invention provides a technical solution: a Japanese heavy-duty universal PU caster, comprising:

[0041] Caster frame 1;

[0042] A roller 2, which is rotatably arranged at the bottom of the caster frame 1;

[0043] A mounting plate 3, which is rotatably disposed on the top of the caster frame 1;

[0044] The brake mechanism includes a positioning frame 4, an unlocking member 5, a locking member 6 and a brake member 7. The positioning frame 4 is positioned at the front end of the caster frame 1. The unlocking member 5 and the locking member 6 are respectively rotatably connected to the positioning frame 4. A reset guide groove 52 is provided on the second side plate 51 of the unlocking member 5. The reset guide groove 52 is connected to the brake groove 53 on the side. The third rotating shaft 60 on the locking member 6 is slidably provided between the reset guide groove 52 and the brake groove 53. The brake member 7 is positioned at the bottom of the locking member 6. A reset assembly 8 is provided between the positioning frame 4, the unlocking member 5 and the locking member 6.

[0045] This caster is a Japanese heavy-duty universal caster. The main components are made of PU material. By rotating the unlocking piece and the locking piece set on the positioning frame and cooperating with the reset component, a brake mechanism for the brake part to brake and switch the mobile state is formed. Press the locking piece down so that the third shaft is pressed into the brake groove along the reset guide groove. The triangular structure of the three shafts cooperates with the pre-tightening effect of the reset component to achieve the locking of the brake mechanism. The brake part is stably abutted on the roller to achieve the brake stop of the caster, ensuring the brake quality of the heavy-duty caster; when it is necessary to switch to the mobile state, press the unlocking piece down so that the third shaft is out of the brake groove. Under the elastic reset action of the reset component, the locking piece is initially rotated and reset. After that, the unlocking piece is released, and the overall structure can be reset under the drive of the reset component. The locking and unlocking operation resistance and impact are small, the structure is not easy to get stuck, and it is easy to use.

[0046] In order to improve the smoothness of the rotation of the roller and the relative rotation of the mounting plate 3 and the caster frame 1, and reduce the movement and steering resistance of the caster, in one embodiment, the roller 2 is rotatably connected to the caster frame 1 through a connecting shaft 11, and a ball bearing 21 is arranged between the roller 2 and the connecting shaft 11. The bottom of the mounting plate 3 is inserted or sleeved and positioned on the top edge of the caster frame 1, and the ball bearing 21 is arranged between the two.

[0047] See also Figure 2 , 3 In one embodiment, a first support plate 43 is disposed behind the positioning frame 4, and the first support plate 43 abuts against the U-shaped door frame 12 at the front end of the caster frame 1. An L-shaped positioning plate 44 extends outward from the rear side of the positioning frame 4, and the L-shaped positioning plate 44 is sleeved on the U-shaped door frame 12 and positioned by bolts. This design can achieve multi-faceted abutment positioning between the positioning frame 4 and the caster frame 1, ensuring the installation strength of the brake mechanism on the caster frame 1.

[0048] A first rotating shaft 40 is disposed between the first side plates 42 on both sides of the positioning frame 4 , and the first rotating shaft 40 is passed through a rear end through hole of the third side plate 63 of the locking member 6 .

[0049] See also Figure 3-5 In one embodiment, a C-type kit 71 is provided on the top of the brake member 7, and the C-type kit 71 is sleeved and positioned on the first rotating shaft 40 and the third rotating shaft 60. A second rotating shaft 50 is also provided between the two first side plates 42, and the second rotating shaft 50 is passed through the through hole on the rear side of the second side plate 51. This design can realize the movable assembly of the brake member 7 on the locking member 6. During the pressing of the locking member 6, the brake member 7 will first abut against the roller 2. If the pressing continues, the C-type kit 71 will be deformed, thereby reducing the impact on the operator when the pressing operation is completed. In addition, through the elastic pre-tightening effect during the structural deformation, the brake member 7 is always tightly abutted against the roller 2, achieving a stable and high-strength braking effect.

[0050] Continue reading Figure 3-5 In one embodiment, the reset assembly 8 is provided with a plurality of torsion springs, the middle part of the torsion spring can be rotatably sleeved on the second rotating shaft 50, the side of the middle part is positioned on the inner wall of the second side plate 51, the first end 81 of the torsion spring abuts against the first top plate 41 and the inner wall of the second support plate 45 of the positioning frame 4, the second support plate 45 is extended laterally from the front end of the first top plate 41, the rear side of the top plate of the unlocking member 5 is provided with an avoidance notch 54 corresponding to the first end 81, and the second end 82 of the torsion spring abuts against the top of the rear end of the locking member 6. The middle part of the torsion spring is positioned on the second side plate 51, which can improve its deformation stability and avoid the problem of unstable elastic force direction caused by lateral deviation. After the locking member 6 is pressed down, its rear side is pushed up, and the second end 82 is deformed to form an elastic force on the locking member 6. After pressing the unlocking member 5, the third rotating shaft 60 is disengaged from the brake groove 53 and moves into the reset guide groove 52. At the same time, after the locking effect of the locking member 6 is released, under the elastic force of the second end 82, the front end is flipped upward for initial reset. Then the unlocking member 5 is released, so that the deformation elastic force of the first end 81 of the torsion spring formed by the relative rotation between it and the positioning frame 4 drives the unlocking member 5 to reset. The unlocking member 5 pulls the third rotating shaft 60 to achieve synchronous reset with the locking member 6.

[0051] A connecting port 62 is provided on the second top plate 61 of the locking member 6, and the unlocking member 5 is rotatably provided in the connecting port 62, so that the rotational movement of the unlocking member 5 and the locking member 6 on the positioning frame 4 is more stable, and a third supporting plate 64 extends downward from the rear side of the connecting port 62, and the third supporting plate 64 abuts against the top of the brake member 7 to provide structural pre-tightening support for the movable assembly of the brake member 7 formed by the C-type kit 71, thereby further improving the braking quality.

[0052] See also Figure 3 In one embodiment, the reset guide groove 52 and the brake groove 53 are T-shaped structures obliquely arranged on the second side plate 51, so that after pressing and releasing the unlocking member 5, the unlocking member 5 can be reset by the torsion spring elastic force and can synchronously drive the locking member 6 to rotate and reset, thereby improving the unlocking efficiency of the caster.

[0053] See also Figure 4 In one embodiment, the brake member 7 is a multi-sided pyramid structure with a narrow surface facing downwards, and the narrow surface is provided with brake teeth 72. The above design can reduce the vibration and pressure transmitted from the roller 2 and the brake member 7 to the brake mechanism when the caster is braked, avoid structural looseness, and improve the braking quality.

[0054] The working principle of a Japanese heavy-duty universal PU caster in this embodiment includes: pressing down the locking member 6 so that the third rotating shaft 60 is pressed into the brake groove 53 along the reset guide groove 52, and the triangular structure of the three rotating shafts cooperates with the pre-tightening effect of the reset component 8 to realize the locking of the brake mechanism, and the brake member 7 is stably abutted on the roller 2 to realize the caster braking, thereby ensuring the braking quality of the heavy-duty caster; when it is necessary to switch to the mobile state, pressing down the unlocking member 5 so that the third rotating shaft 60 is disengaged from the brake groove 53, and under the elastic reset action of the reset component 8, the locking member 6 is initially rotated and reset, and then the unlocking member 5 is released, and the overall structure can be reset under the drive of the reset component 8.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A Japanese heavy-duty universal PU caster, characterized in that: include: Caster frame; A roller, which is rotatably arranged at the bottom of the caster frame; A mounting plate rotatably disposed on the top of the caster frame; The brake mechanism includes a positioning frame, an unlocking member, a locking member and a brake member. The positioning frame is positioned at the front end of the caster frame. The unlocking member and the locking member are respectively rotatably connected to the positioning frame. A reset guide groove is arranged on the second side plate of the unlocking member. The reset guide groove is connected to the brake groove on the side. The third rotating shaft on the locking member is slidably arranged between the reset guide groove and the brake groove. The brake member is positioned at the bottom of the locking member. A reset assembly is arranged between the positioning frame, the unlocking member and the locking member.

2. A Japanese heavy-duty universal PU caster according to claim 1, characterized in that: The roller is rotatably connected to the caster frame via a connecting shaft, a ball bearing is arranged between the roller and the connecting shaft, the bottom of the mounting plate is inserted or sleeved and positioned on the top edge of the caster frame, and the ball bearing is arranged between the two.

3. A Japanese heavy-duty universal PU caster according to claim 1, characterized in that: A first support plate is arranged behind the positioning frame, and the first support plate abuts against the U-shaped door frame at the front end of the caster frame. An L-shaped positioning plate extends outward from the rear side of the positioning frame, and the L-shaped positioning plate is sleeved on the U-shaped door frame and positioned by bolts.

4. A Japanese heavy-duty universal PU caster according to claim 1, characterized in that: A first rotating shaft is arranged between the first side plates on both sides of the positioning frame, and the first rotating shaft is passed through the rear end through hole of the third side plate of the locking member. A C-type kit is arranged on the top of the brake member, and the C-type kit is sleeved and positioned on the first rotating shaft and the third rotating shaft. A second rotating shaft is also arranged between the two first side plates, and the second rotating shaft is passed through the rear side through hole of the second side plate.

5. A Japanese heavy-duty universal PU caster according to claim 4, characterized in that: The reset assembly is provided with multiple torsion springs, the middle part of the torsion spring can be rotatably sleeved on the second rotating shaft, and the side surface of the middle part is positioned on the inner wall of the second side plate, the first end of the torsion spring abuts against the first top plate and the inner wall of the second support plate of the positioning frame, the second support plate is extended laterally from the front end of the first top plate, and an avoidance notch corresponding to the first end is provided on the rear side of the unlocking member top plate, and the second end of the torsion spring abuts against the top of the rear end of the locking member.

6. A Japanese heavy-duty universal PU caster according to claim 1, characterized in that: A communication port is arranged on the second top plate of the locking member, the unlocking member is rotatably arranged in the communication port, a third support plate extends downwardly from the rear side of the communication port, and the third support plate abuts against the top of the brake member.

7. A Japanese heavy-duty universal PU caster according to claim 1, characterized in that: The reset guide groove and the brake stop groove are T-shaped structures obliquely arranged on the second side plate.

8. The Japanese heavy-duty universal PU caster according to claim 1, characterized in that: The brake member is a multi-sided pyramid structure with a narrow surface facing downwards, and brake teeth are arranged on the narrow surface.

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