Double-brake universal trundle stable in locking and unlocking and convenient to operate

Abstract

The utility model discloses a double-brake universal trundle stable in locking and unlocking and convenient to operate. The double-brake universal trundle comprises a trundle frame. Moving wheels; the connecting assembly is rotationally arranged on the trundle frame, an auxiliary brake piece is arranged at the bottom of the connecting assembly, and the auxiliary brake piece is inserted into the rotary butt joint opening and extends to an inner cavity of the trundle frame; the double-brake assembly is rotationally arranged in the inner cavity of the trundle frame, a first brake piece is arranged at the front end of the double-brake assembly, and a second brake piece corresponding to the auxiliary brake piece is arranged at the rear end of the double-brake assembly; the brake assembly is rotationally arranged at the front end of the trundle frame, and the rear side of the brake assembly extends backwards to form a brake insertion block and a reset insertion block; and the reset assembly is rotationally arranged on the trundle frame and on the rear side of the brake assembly, and a first positioning groove and a second positioning groove corresponding to the reset insertion block and the brake insertion block respectively are formed in the bottom of the reset assembly. According to the universal caster, the problems that the design structure of double brakes independently arranged on an existing universal caster is complex, assembling and locking and unlocking operation are inconvenient, and the strength and the stability of the double brakes are insufficient can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of casters, in particular to a double-brake universal caster with stable locking and unlocking and convenient operation. Background Art

[0002] The rotation brake of the moving wheel on the existing universal caster and the steering brake structure of the connecting component connecting the caster frame are generally designed independently and are equipped with elastic components such as springs and torsion springs to achieve structural pre-tightening, locking and resetting functions, making the structure more complicated and inconvenient to assemble, lock and unlock operations, and the double brake strength and stability are insufficient. Utility Model Content

[0003] The purpose of the utility model is to provide a dual-brake universal caster with stable and convenient locking and unlocking operations in order to solve the problems that the design structure of the dual brakes independently arranged on the existing universal casters is relatively complex, inconvenient to assemble and lock and unlock, and the dual brakes have insufficient strength and stability.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a dual-brake universal caster with stable locking and unlocking and convenient operation, comprising:

[0005] Caster frame;

[0006] Moving wheels;

[0007] A connecting assembly is rotatably mounted on the caster frame, and an auxiliary brake member is disposed at the bottom thereof. The auxiliary brake member is inserted into the rotation docking port and extends into the inner cavity of the caster frame;

[0008] A dual brake assembly is rotatably disposed in the inner cavity of the caster frame, with a first brake member disposed at its front end and a second brake member corresponding to the auxiliary brake member disposed at its rear end;

[0009] A brake assembly is rotatably mounted on the front end of the caster frame, and a brake plug and a reset plug are extended rearward from the rear side of the brake assembly;

[0010] The reset component is rotatably arranged on the caster frame and the rear side of the brake component, and the bottom of the reset component is provided with a first positioning groove and a second positioning groove corresponding to the reset plug block and the brake plug block respectively.

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

[0012] A clamp is provided at the bottom of the caster frame, and the movable wheel is rotatably set on the caster frame through the roller shaft on the clamp. A first concentric installation groove is provided on the side of the movable wheel, and a hub frame is embedded and assembled in the first installation groove. The roller shaft passes through the hub frame, and a socket is provided on the side of the hub frame, and the clamp is inserted into the socket.

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

[0014] The connecting assembly includes a connecting rod and a mounting plate for positioning the auxiliary brake component at the bottom. The bottom edge of the mounting plate is plugged into or sleeved on the top edge of the caster frame, and the inner wall of the top edge is connected to the rotation docking port. The middle part of the connecting rod and the multi-prism-shaped positioning block are embedded in the second mounting groove on the top of the mounting plate. A bearing is arranged between the auxiliary brake component and the mounting plate, and the outer flange of the bearing is embedded in the rotation docking port. The bottom of the connecting rod is provided with a stepped plug block that is plugged into the through hole of the mounting plate and the inner cavity of the bearing.

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

[0016] The first brake component is obliquely arranged at the front end of the dual brake assembly, and brake blocks are arranged at intervals at the bottom thereof, forming a cavity between adjacent brake blocks, and brake strips are arranged at intervals on the brake blocks. The bottom surface of the brake strip is an arc surface that partially matches the surface of the moving tire, and a convex rib is arranged at the bottom of the brake assembly to abut against the first brake component.

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

[0018] A pre-tightening tongue piece extends from the rear side of the first brake member, and the pre-tightening tongue piece abuts against the support block in the inner cavity of the caster frame.

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

[0020] A gear ring is provided at the bottom of the auxiliary brake member, and a plurality of gear elements are spaced circumferentially along the gear ring. The second brake member is an annular structure, and a tooth groove corresponding to the gear element is provided on the top.

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

[0022] A hinge seat is provided on the inner wall of the front end of the caster frame, and a first hinge groove and a second hinge groove are extended inward from the side of the hinge seat. The second hinge column on the side of the front end of the dual brake assembly is rotatably set in the first hinge groove, and the third hinge column on the side of the reset assembly is rotatably set in the second hinge groove. The third hinge groove at the notch at the rear end of the brake assembly is sleeved on the first hinge column on the inner side of the side ear at the front end of the caster frame, and an opening is provided on the side of the third hinge groove.

[0023] As a further description of the above technical solution:

[0024] The side surface of the caster frame is retracted 1.5° from the back to the front, and the side surface of the double brake assembly is provided with a limit block abutting against the side wall of the inner cavity of the caster frame.

[0025] As a further description of the above technical solution:

[0026] The front ends of the brake assembly and the reset assembly are respectively provided with a first pressing portion and a second pressing portion, and the second pressing portion is embedded in a guide groove provided at the rear side of the first pressing portion.

[0027] As a further description of the above technical solution:

[0028] A first protruding block, a second protruding block, and a third protruding block extend downward in sequence from the bottom of the reset assembly. A first positioning groove is formed between the first protruding block and the second protruding block, a second positioning groove is formed between the second protruding block and the third protruding block, and an avoidance cavity corresponding to the reset plug is formed between the first protruding block and the second pressing portion.

[0029] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0030] 1. The double-brake universal caster of the utility model is made of plastic throughout. The double-brake structure composed of a double-brake component, a brake component, and a reset component has a simple structure. By pressing the brake component, one side of the double-brake component is pressed down and the other side is tilted, and the reset component is locked with it. The two brake parts cooperate with the auxiliary brake part to realize the synchronous double-brake function of stopping the moving wheel and locking the connecting component and the caster frame in steering. By pressing the reset component, the locking state between it and the brake component is released, and the double-brake component can drive the above structure to reset and lock it again. When the caster is in the braked and active state, the brake plug or the reset plug is plugged into the positioning groove to realize structural positioning, ensuring that the locked and unlocked states are stable and easy to operate.

[0031] 2. The pre-tightening tongue can elastically pre-tighten the dual-brake assembly when it rotates to prevent it from shaking. After pressing the reset assembly, the center of gravity on both sides of the dual-brake assembly's rotating connection is distributed based on the lever principle, causing one side of the first brake component to tilt up. The pre-tightening tongue can also provide buffering, so that the two fit together on the bottom surface of the caster frame and the reset assembly, preventing the dual-brake assembly from shaking during movement, affecting the movement of the caster and the structural stability in the moving state. This design eliminates the use of elastic components such as springs and torsion springs in the caster, making the structural reset and pre-tightening effects more stable and lasting. The limit block and the retracted design of the caster frame are used to enhance the stability of the dual-brake assembly during the rotation of the caster frame and play a guiding role. The structural retracted design allows the dual-brake assembly to be tightly embedded in the retracted inner wall of the caster frame after the downward pressure of the brake assembly is removed and it flips naturally, ensuring the stable positioning of the dual-brake assembly when the caster is in an active state.

[0032] 3. The design of multiple, spaced brake blocks ensures tight contact with the compressed, slightly deformed wheel surface. Furthermore, under the influence of natural wind, the curved surface of the wheel forces the first brake member toward one side of the wheel, where the wind speed within the cavity is greater than the other side. This allows the first brake member to be more fully pressed against the wheel when braking and abutting the wheel, ensuring effective braking. The second brake member, with its gear ring and annular structure, provides steering lock for the caster frame and connecting assembly, ensuring structural locking and steering braking strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 The schematic diagram shows the structure of a dual-brake universal caster that is stable, easy to operate, and can be locked and unlocked.

[0035] Figure 2 This is a cross-sectional view of the caster frame, double brake assembly, brake assembly, and reset assembly in a partially disassembled state of a double-brake universal caster with stable locking and unlocking and convenient operation.

[0036] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0037] Figure 4 This is a structural schematic diagram of the dual-brake assembly in a dual-brake universal caster with stable locking and unlocking and convenient operation.

[0038] Figure 5 This is a disassembly diagram of the caster frame, auxiliary brake parts, brake assembly, and reset assembly of a dual-brake universal caster with stable locking and unlocking and convenient operation.

[0039] Figure 6 This is a disassembled diagram of the brake assembly and reset assembly in a dual-brake universal caster with stable locking and unlocking and convenient operation.

[0040] Figure 7 This is a partial disassembly diagram of a double-brake swivel caster that is stable, easy to operate, and can be locked and unlocked.

[0041] Legend:

[0042] 1. Caster frame; 11. Rotating docking port; 12. Support block; 13. Articulated seat; 131. First articulated slot; 132. Second articulated slot; 14. Side ears; 141. First articulated column; 15. Clamp; 151. Roller shaft; 16. Top edge; 2. Moving wheel; 21. First mounting slot; 22. Hub carrier; 23. Socket; 3. Connecting assembly; 31. Auxiliary brake member; 311. Gear ring; 32. Connecting rod; 321. Stepped insert; 322. Positioning block; 33. Mounting plate; 331. Bottom edge; 332. Second mounting slot; 34. Bearing; 4. Dual brake assembly; 4 1. First brake component; 411. Brake block; 412. Cavity; 413. Brake strip; 42. Second brake component; 421. Tooth groove; 43. Preload tongue; 44. Second hinge column; 45. Limit block; 5. Brake assembly; 51. First pressing portion; 52. Stop plug; 53. Reset plug; 54. Rib; 55. Guide groove; 56. Third hinge groove; 561. Opening; 6. Reset assembly; 61. Second pressing portion; 62. First positioning groove; 63. Second positioning groove; 64. First protruding block; 65. Second protruding block; 66. Third protruding block; 67. Third hinge column. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0045] 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 claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0046] 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, it does not need to be further defined or explained in subsequent drawings.

[0047] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is usually placed when in use. These 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 orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0048] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0049] See also Figure 1-7 The utility model provides a technical solution: a dual-brake universal caster with stable locking and unlocking and convenient operation, comprising:

[0050] Caster frame 1;

[0051] Moving wheel 2;

[0052] The connecting assembly 3 is rotatably mounted on the caster frame 1, and an auxiliary brake member 31 is provided at its bottom. The auxiliary brake member 31 is inserted into the rotating docking port 11 and extends into the inner cavity of the caster frame 1. In this embodiment, the moving wheel 2 and the connecting assembly 3 are eccentrically designed. Taking a 4-inch caster frame 1 as an example, the distance between the moving wheel 2 and the rotating axis of the connecting assembly 3 on the horizontal plane (the perpendicular and minimum distance between the line and the point) is 31.5 mm.

[0053] A dual brake assembly 4 is rotatably disposed in the inner cavity of the caster frame 1, with a first brake member 41 disposed at its front end and a second brake member 42 corresponding to the auxiliary brake member 31 disposed at its rear end;

[0054] The brake assembly 5 is rotatably mounted on the front end of the caster frame 1, and a brake plug 52 and a reset plug 53 are extended backward from the rear side thereof;

[0055] The reset assembly 6 is rotatably mounted on the caster frame 1 and behind the brake assembly 5 , and has a bottom with a first positioning slot 62 and a second positioning slot 63 corresponding to the reset plug 53 and the brake plug 52 , respectively.

[0056] The double-brake universal caster of the utility model is made of plastic throughout. The double-brake structure composed of a double-brake component, a brake component and a reset component has a simple structure. When the brake component is pressed, one side of the double-brake component is pressed down and the other side is tilted, and the reset component is locked with it. The two brake parts cooperate with the auxiliary brake part to realize the synchronous double-brake function of stopping the moving wheel and locking the connecting component and the caster frame in steering. When the reset component is pressed, the locking state between it and the brake component is released, and the double-brake component can be used to drive the above structure to reset and lock it again. When the caster is in the braked and active state, the brake plug-in or the reset plug-in cooperates with the positioning groove to realize structural positioning, ensuring that the locked and unlocked states are stable and the operation is convenient.

[0057] In one embodiment, Figure 7 The bottom of the caster frame 1 is provided with a clamping opening 15, and the mobile wheel 2 is rotatably mounted on the caster frame 1 via a roller shaft 151 on the clamping opening 15. A concentric first mounting groove 21 is provided on the side of the mobile wheel 2, and a wheel hub 22 is embedded and assembled in the first mounting groove 21. The roller shaft 151 passes through the wheel hub 22, and the wheel hub 22 is laterally provided with a socket 23, into which the clamping opening 15 is inserted. This design makes the assembly of the mobile wheel 2 on the caster frame 1 more stable, preventing the mobile wheel 2 from shaking on the caster frame 1 when the brake is stopped, thereby improving the stability of state switching and maintenance.

[0058] In one embodiment, Figure 7 The connecting assembly 3 includes a connecting rod 32 for positioning the auxiliary brake member 31 at the bottom, and a mounting plate 33. The bottom edge 331 of the mounting plate 33 is inserted or sleeved onto the top edge 16 of the caster frame 1, and the inner wall of the top edge 16 engages the rotational docking port 11. A multi-prism-shaped positioning block 322 in the middle of the connecting rod 32 is inserted into a second mounting groove 332 at the top of the mounting plate 33. A bearing 34 is disposed between the auxiliary brake member 31 and the mounting plate 33, and the outer flange of the bearing 34 is embedded in the rotational docking port 11. A stepped insert 321 is disposed at the bottom of the connecting rod 32, which engages with the through hole of the mounting plate 33 and the inner cavity of the bearing 34. This design makes the assembly of the connecting assembly 3 on the caster frame 1 more stable, preventing structural shaking during steering and braking, thereby improving the stability of universal movement, directional dual-brake state switching, and maintenance.

[0059] The first brake member 41 is tilted and disposed at the front end of the dual-brake assembly 4. Brake blocks 411 are spaced apart at its bottom, forming a cavity 412 between adjacent brake blocks 411. Brake strips 413 are spaced apart on the brake blocks 411. The bottom surface of each brake strip 413 forms an arcuate surface that partially matches the tread of the moving wheel 2. A rib 54 is disposed at the bottom of the brake assembly 5 to abut against the first brake member 41. The design of multiple, spaced brake blocks 411 ensures close contact with the compressed and slightly deformed tread of the moving wheel 2. Furthermore, under the influence of natural wind, due to the curved surface of the moving wheel 2, the first brake member 41 faces one side of the moving wheel 2, i.e., the wind speed in the cavity 412 is greater than that on the other side. This allows the first brake member 41 to be more fully pressed against the moving wheel 2 by the wind when the vehicle is stopped and abuts against the moving wheel 2, thereby ensuring effective braking.

[0060] A pre-tightening tongue 43 extends from the rear side of the first brake component 41, and the pre-tightening tongue 43 abuts against the support block 12 in the inner cavity of the caster frame 1. This design allows the pre-tightening tongue 43 to elastically pre-tighten the dual brake assembly 4 when it rotates to prevent shaking. After pressing the reset assembly 6, the center of gravity on both sides of the rotation connection of the dual brake assembly 4 is distributed based on the lever principle, causing one side of the first brake component 41 to tilt up. The pre-tightening tongue 43 can also provide buffering, so that the two fit together on the bottom surface of the caster frame 1 and the reset assembly 6, preventing the dual brake assembly 4 from shaking during movement, affecting the movement of the caster and the structural stability in the moving state. This design eliminates the use of elastic components such as springs and torsion springs in the caster, making the structural reset and pre-tightening effects more stable and lasting.

[0061] The auxiliary brake member 31 has a toothed ring 311 at its base, with several toothed elements spaced circumferentially along the ring. The second brake member 42 is an annular structure with tooth grooves 421 corresponding to the toothed elements defined at its top. The toothed ring 311 and the annular second brake member 42 provide a steering lock for the caster frame 1 and connecting assembly 3, ensuring strong locking.

[0062] In order to improve the flexibility of the dual brake assembly 4, the brake assembly 5, and the reset assembly 6 in rotating on the caster frame 1 and reduce the resistance to movement, a hinge seat 13 is provided on the inner wall of the front end of the caster frame 1, and the side of the hinge seat 13 extends inward with a first hinge groove 131 and a second hinge groove 132. The second hinge column 44 on the side of the front end of the dual brake assembly 4 is rotatably set in the first hinge groove 131, and the third hinge column 67 on the side of the reset assembly 6 is rotatably set in the second hinge groove 132. The third hinge groove 56 at the notch at the rear end of the brake assembly 5 is sleeved on the first hinge column 141 on the inner side of the side ear 14 at the front end of the caster frame 1, and an opening 561 is provided on the side of the third hinge groove 56.

[0063] Taking a 4-inch caster frame 1 as an example, the sides of the caster frame 1 and the brake assembly 5 are retracted 1.5° from the back to the front, and the whole is moved inward 2.25mm. The side of the dual brake assembly 4 is provided with a limit block 45 that abuts against the side wall of the inner cavity of the caster frame 1. This design is mainly used to enhance the stability of the dual brake assembly 4 during the rotation of the caster frame 1 and play a guiding role. The structural retraction design allows the dual brake assembly 4 to be tightly embedded in the retracted inner wall of the caster frame 1 after the downward pressure of the brake assembly 5 is removed and it naturally flips over, ensuring the stable positioning of the dual brake assembly 4 when the caster is in motion.

[0064] The front ends of the brake assembly 5 and the reset assembly 6 are respectively provided with a first pressing portion 51 and a second pressing portion 61 . The second pressing portion 61 is embedded in the guide groove 55 provided on the rear side of the first pressing portion 51 to improve the movement and positioning stability between the structures.

[0065] A first protrusion block 64, a second protrusion block 65, and a third protrusion block 66 extend downward in sequence from the bottom of the reset assembly 6. A first positioning groove 62 is formed between the first protrusion block 64 and the second protrusion block 65. A second positioning groove 63 is formed between the second protrusion block 65 and the third protrusion block 66. An avoidance cavity corresponding to the reset plug 53 is formed between the first protrusion block 64 and the second pressing portion 61.

[0066] The working principle of the dual-brake universal caster of this embodiment, which is stable in locking and unlocking and convenient in operation, includes the following steps: when the caster needs to be braked, the brake assembly 5 is pressed, so that one side of the dual-brake assembly 4 is pressed down and the other side is tilted, and the brake plug 52 on the reset assembly 6 is locked with the second positioning groove 63, and the brake strip 413 of the first brake component 41 abuts against the tread of the moving wheel 2, and the tooth ring 311 is circumferentially plugged into the tooth groove 421 of the annular second brake component 42, thereby realizing the synchronous dual-brake function of braking the moving wheel and locking the connecting assembly and the caster frame in a steering manner; when the caster needs to be moved, the reset assembly 6 is pressed to release the locking state between it and the brake assembly, and the brake plug 52 is disengaged from the second positioning groove 63, after which the dual-brake assembly 4 is released from pressure, naturally flips over and drives the above-mentioned structure to reset, and the reset plug 53 is plugged into the first positioning groove 62, and the structure is locked again. The locking and unlocking state is stable and easy to operate.

[0067] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dual-brake universal caster with stable locking and unlocking and convenient operation, characterized in that: include: Caster frame; Moving wheels; A connecting assembly is rotatably mounted on the caster frame, and an auxiliary brake member is disposed at the bottom thereof. The auxiliary brake member is inserted into the rotation docking port and extends into the inner cavity of the caster frame; A double brake assembly is rotatably disposed in the inner cavity of the caster frame, with a first brake member disposed at its front end and a second brake member corresponding to the auxiliary brake member disposed at its rear end; A brake assembly is rotatably mounted on the front end of the caster frame, and a brake plug and a reset plug are extended rearward from the rear side of the brake assembly; The reset component is rotatably arranged on the caster frame and the rear side of the brake component, and the bottom of the reset component is provided with a first positioning groove and a second positioning groove corresponding to the reset plug block and the brake plug block respectively.

2. The dual-brake universal caster with stable locking and unlocking and convenient operation according to claim 1, characterized in that: A clamp is provided at the bottom of the caster frame, and the movable wheel is rotatably set on the caster frame through the roller shaft on the clamp. A first concentric installation groove is provided on the side of the movable wheel, and a hub frame is embedded and assembled in the first installation groove. The roller shaft passes through the hub frame, and a socket is provided on the side of the hub frame, and the clamp is inserted into the socket.

3. The dual-brake universal caster with stable locking and unlocking and convenient operation according to claim 1, characterized in that: The connecting assembly includes a connecting rod and a mounting plate for positioning the auxiliary brake component at the bottom. The bottom edge of the mounting plate is plugged into or sleeved on the top edge of the caster frame, and the inner wall of the top edge is connected to the rotation docking port. The middle part of the connecting rod and the multi-prism-shaped positioning block are embedded in the second mounting groove on the top of the mounting plate. A bearing is arranged between the auxiliary brake component and the mounting plate, and the outer flange of the bearing is embedded in the rotation docking port. The bottom of the connecting rod is provided with a stepped plug block that is plugged into the through hole of the mounting plate and the inner cavity of the bearing.

4. The dual-brake universal caster with stable locking and unlocking and convenient operation according to claim 1, characterized in that: The first brake component is obliquely arranged at the front end of the dual brake assembly, and brake blocks are arranged at intervals at the bottom thereof, forming a cavity between adjacent brake blocks, and brake strips are arranged at intervals on the brake blocks. The bottom surface of the brake strip is an arc surface that partially matches the surface of the moving tire, and a convex rib is arranged at the bottom of the brake assembly to abut against the first brake component.

5. The dual-brake universal caster with stable locking and unlocking and convenient operation according to claim 1, characterized in that: A pre-tightening tongue piece extends from the rear side of the first brake member, and the pre-tightening tongue piece abuts against the support block in the inner cavity of the caster frame.

6. The dual-brake universal caster with stable locking and unlocking and convenient operation according to claim 1, characterized in that: A gear ring is provided at the bottom of the auxiliary brake member, and a plurality of gear elements are spaced circumferentially along the gear ring. The second brake member is an annular structure, and a tooth groove corresponding to the gear element is provided on the top.

7. The dual-brake universal caster with stable locking and unlocking and convenient operation according to claim 1, characterized in that: A hinge seat is provided on the inner wall of the front end of the caster frame, and a first hinge groove and a second hinge groove are extended inward from the side of the hinge seat. The second hinge column on the side of the front end of the dual brake assembly is rotatably set in the first hinge groove, and the third hinge column on the side of the reset assembly is rotatably set in the second hinge groove. The third hinge groove at the notch at the rear end of the brake assembly is sleeved on the first hinge column on the inner side of the side ear at the front end of the caster frame, and an opening is provided on the side of the third hinge groove.

8. The dual-brake universal caster with stable locking and unlocking and convenient operation according to claim 1, characterized in that: The side surface of the caster frame is retracted 1.5° from the back to the front, and the side surface of the double brake assembly is provided with a limit block abutting against the side wall of the inner cavity of the caster frame.

9. The dual-brake universal caster with stable locking and unlocking and convenient operation according to claim 1, characterized in that: The front ends of the brake assembly and the reset assembly are respectively provided with a first pressing portion and a second pressing portion, and the second pressing portion is embedded in a guide groove provided at the rear side of the first pressing portion.

10. The dual-brake universal caster with stable locking and unlocking and convenient operation according to claim 1, characterized in that: A first protruding block, a second protruding block, and a third protruding block extend downward in sequence from the bottom of the reset assembly. A first positioning groove is formed between the first protruding block and the second protruding block, a second positioning groove is formed between the second protruding block and the third protruding block, and an avoidance cavity corresponding to the reset plug is formed between the first protruding block and the second pressing portion.

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