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

Abstract

The invention 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 an existing universal caster is relatively complex in double-brake design structure, inconvenient to assemble, inconvenient to lock and unlock, and insufficient in double-brake strength and stability can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of casters, in particular to a dual-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, which makes the structure more complicated and inconvenient to assemble, lock and unlock operations, and the double brake strength and stability are insufficient. Summary of the invention

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

[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 arranged on the caster frame, and an auxiliary brake member is arranged at the bottom thereof, and the auxiliary brake member is inserted into the rotating docking port and extends to the inner cavity of the caster frame;

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

[0009] A brake assembly is rotatably arranged at the front end of the caster frame, and a brake plug and a reset plug are extended backwards 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 wheel hub frame is embedded and assembled in the first installation groove. The roller shaft passes through the wheel hub frame, and a socket is provided on the side of the wheel 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 inserted or sleeved on the top edge of the caster frame, and the inner wall of the top edge is connected to the rotating 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 rotating docking port. A stepped plug-in block is arranged at the bottom of the connecting rod and is inserted 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, and a cavity is formed between adjacent brake blocks. Brake strips are arranged at intervals on the brake blocks, and the bottom surface of the brake strips is an arc surface that partially matches the surface of the moving tire. A convex rib abutting against the first brake component is arranged at the bottom of the brake assembly.

[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 a supporting block in the inner cavity of the caster frame.

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

[0020] A toothed ring is arranged at the bottom of the auxiliary brake member, and a plurality of toothed elements are arranged at intervals along the circumference of the toothed ring. The second brake member is an annular structure, and a tooth groove corresponding to the toothed element is opened 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 double 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 set 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 arranged 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 are sequentially extended downward from the bottom of the reset component, the first positioning groove is formed between the first protruding block and the second protruding block, the 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 present invention 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 up, 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 turning and locking the connecting component and the caster frame. 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 brake stop and active state, the brake stop plug block or the reset plug block cooperates with the positioning groove to realize structural positioning, ensuring that the locking and unlocking states are stable and the operation is convenient.

[0031] 2. The pre-tightening tongue piece can elastically pre-tighten the double brake assembly when it rotates to avoid shaking. After pressing the reset assembly, the center of gravity on both sides of the rotating connection of the double brake assembly is distributed based on the principle of leverage, so that one side of the first brake component is tilted up. The pre-tightening tongue piece can also be used for buffering, so that the two fit together on the bottom surface of the caster frame and the reset assembly to avoid shaking of the double brake assembly 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 double brake assembly during the rotation of the caster frame and play a guiding role. The structural retracted design allows the double 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 naturally flipped, ensuring the stable positioning of the double brake assembly when the caster is in an active state.

[0032] 3. Through the design of intervals and multiple brake blocks, the pressed and slightly deformed moving wheel surface can be closely abutted. Under the action of natural wind, due to the curved surface of the moving wheel, the first brake member faces one side of the moving wheel, that is, the wind speed in the cavity is greater than that on the other side, so that the first brake member is pressed more fully on the moving wheel under the action of wind force when it stops and abuts on the moving wheel, ensuring the braking effect. The second brake member with a gear ring and annular structure is used to lock the steering of the caster frame and the connecting assembly, ensuring the 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 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.

[0034] Figure 1 The invention is a structural schematic diagram of a double-brake universal caster which has stable locking and unlocking and convenient operation.

[0035] Figure 2 The invention discloses a cross-sectional view of a caster frame, a double brake assembly, a brake assembly and a reset assembly of a double brake universal caster which has stable locking and unlocking and convenient operation in a partially disassembled state.

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

[0037] Figure 4 The present invention is a structural schematic diagram of a double brake assembly in a double brake universal caster with stable locking and unlocking and convenient operation.

[0038] Figure 5 The disassembly diagram shows a caster frame, auxiliary brake parts, brake assembly and reset assembly of a double-brake universal caster which has stable locking and unlocking and convenient operation.

[0039] Figure 6 The disassembly diagram of the brake assembly and reset assembly in a double-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 has stable locking and unlocking, and is easy to operate.

[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 ear; 141. First articulated column; 15. Clamp; 151. Roller shaft; 16. Top edge; 2. Moving wheel; 21. First mounting slot; 22. Hub frame; 23. Socket; 3. Connecting assembly; 31. Auxiliary brake member; 311. Gear ring; 32. Connecting rod; 321. Stepped plug block; 322. Positioning block; 33. Mounting plate; 331. Bottom edge; 332. Second mounting slot; 34. Bearing; 4. Double brake assembly; 4 1. First brake member; 411. Brake block; 412. Cavity; 413. Brake strip; 42. Second brake member; 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 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.

[0044] 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.

[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 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.

[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, further definition and explanation thereof is not required in subsequent drawings.

[0047] 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.

[0048] 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.

[0049] See also Figure 1-7 The present invention 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 component 3 is rotatably arranged on the caster frame 1, and an auxiliary brake member 31 is arranged at the bottom thereof. The auxiliary brake member 31 is inserted into the rotating docking port 11 and extends to the inner cavity of the caster frame 1. In this embodiment, the moving wheel 2 and the connecting component 3 are eccentrically designed. Taking the 4-inch caster frame 1 as an example, the distance between the moving wheel 2 and the connecting component 3 projected on the horizontal plane (the vertical and minimum distance between the line and the point) is 31.5 mm.

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

[0054] A brake assembly 5 is rotatably arranged at the front end of the caster frame 1, and a brake plug 52 and a reset plug 53 are extended backwards from the rear side thereof;

[0055] The reset assembly 6 is rotatably disposed on the caster frame 1 and at the rear side of the brake assembly 5 , and has a first positioning groove 62 and a second positioning groove 63 at its bottom corresponding to the reset plug 53 and the brake plug 52 respectively.

[0056] The double-brake universal caster of the present invention 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 up, and the reset component is locked with it. The two brake parts can cooperate with the auxiliary brake part to realize the synchronous double-brake function of stopping the moving wheel and turning and locking the connecting component and the caster frame. By pressing the reset component, 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 brake stop and active state, the structure is positioned by plugging the brake stop plug block or the reset plug block into the positioning groove to ensure that the locking and unlocking states are stable and the operation is convenient.

[0057] In one embodiment, if Figure 7 The bottom of the caster frame 1 is provided with a clamping opening 15, and the moving wheel 2 is rotatably arranged on the caster frame 1 through the roller shaft 151 on the clamping opening 15. The side of the moving wheel 2 is provided with a concentric first mounting groove 21, and a hub frame 22 is embedded and assembled in the first mounting groove 21. The roller shaft 151 passes through the hub frame 22, and the hub frame 22 is laterally provided with a socket 23, and the clamping opening 15 is inserted into the socket 23. The above design makes the assembly of the moving wheel 2 on the caster frame 1 more stable, and prevents the moving 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, if Figure 7 The connecting assembly 3 includes a connecting rod 32 and a mounting plate 33 for positioning the auxiliary brake member 31 at the bottom. The bottom edge 331 of the mounting plate 33 is plugged or sleeved on the top edge 16 of the caster frame 1. The inner wall of the top edge 16 is connected to the rotation docking port 11. The multi-prism-shaped positioning block 322 in the middle of the connecting rod 32 is embedded in the second mounting groove 332 at the top of the mounting plate 33. A bearing 34 is arranged between the auxiliary brake member 31 and the mounting plate 33. The outer flange of the bearing 34 is embedded in the rotation docking port 11. The bottom of the connecting rod 32 is provided with a stepped plug block 321 plugged into the through hole of the mounting plate 33 and the inner cavity of the bearing 34. The above design makes the assembly of the connecting assembly 3 on the caster frame 1 more stable, avoids the shaking of the structure when the two are turned and braked, and thus improves the stability of universal movement, directional double brake state switching, and maintenance.

[0059] The first brake member 41 is obliquely arranged at the front end of the double brake assembly 4, and brake blocks 411 are arranged at intervals at the bottom thereof, and a cavity 412 is formed between adjacent brake blocks 411. Brake strips 413 are arranged at intervals on the brake blocks 411, and the bottom surface of the brake strips 413 is an arc surface that partially matches the tread of the moving wheel 2. The bottom of the brake assembly 5 is provided with a convex rib 54 that abuts against the first brake member 41. Through the design of multiple brake blocks 411 at intervals, it is possible to achieve close abutment against the tread of the moving wheel 2 that is under pressure and slightly deformed, and under the action 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, that is, the wind speed in the cavity 412 is greater than that on the other side, so that when the first brake member 41 is stopped and abutted against the moving wheel 2, it is pressed more fully against the moving wheel 2 by the wind force, thereby ensuring the braking effect.

[0060] A pre-tightening tongue 43 extends from the rear side of the first brake member 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 be elastically pre-tightened when the double brake assembly 4 rotates to avoid shaking, and after pressing the reset assembly 6, the center of gravity of the double brake assembly 4 is distributed on both sides of the rotation connection, based on the lever principle, so that one side of the first brake member 41 is tilted, and the pre-tightening tongue 43 can also be used for buffering, so that the two fit together on the bottom surface of the caster frame 1 and the reset assembly 6, to avoid shaking of the double brake assembly 4 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 durable.

[0061] A toothed ring 311 is provided at the bottom of the auxiliary brake member 31, and a plurality of toothed elements are arranged at intervals along the circumference of the toothed ring 311. The second brake member 42 is an annular structure, and a tooth groove 421 corresponding to the toothed element is provided at the top thereof. The steering of the caster frame 1 and the connecting assembly 3 is locked by the toothed ring 311 and the annular second brake member 42, thereby ensuring the locking strength.

[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 movement resistance, 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 set on the side of the third hinge groove 56.

[0063] Taking the 4-inch caster frame 1 as an example, 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 double 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 double brake assembly 4 in the rotation of the caster frame 1 and play a guiding role. Through the structural retraction design, the double brake assembly 4 can 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 naturally turned over, ensuring the stable positioning of the double brake assembly 4 when the caster is in an active state.

[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 , and the second pressing portion 61 is embedded in a guide groove 55 arranged at the rear side of the first pressing portion 51 to improve the mobility and positioning stability between the structures.

[0065] A first protruding block 64, a second protruding block 65, and a third protruding block 66 are sequentially extended downward from the bottom of the reset component 6. The first positioning groove 62 is formed between the first protruding block 64 and the second protruding block 65. The second positioning groove 63 is formed between the second protruding block 65 and the third protruding block 66. An avoidance cavity corresponding to the reset plug 53 is formed between the first protruding block 64 and the second pressing portion 61.

[0066] The working principle of a dual-brake universal caster with stable locking and unlocking and convenient operation of the present embodiment includes: 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, that is, the brake strip 413 of the first brake member 41 is abutted against the tread of the moving wheel 2, and the tooth ring 311 is circumferentially plugged with the tooth groove 421 of the second brake member 42 of the annular structure, so as to realize the synchronous dual-brake function of braking the moving wheel and locking the connecting assembly and the caster frame; when the caster needs to move, the reset assembly 6 is pressed so that the locking state between it and the brake assembly is released, and the brake plug 52 is disengaged from the second positioning groove 63, and then the dual-brake assembly 4 is released from pressure, naturally flipped and drives the above structure to reset, and the reset plug 53 is plugged with the first positioning groove 62, and the structure is locked again. The locking and unlocking state is stable and the operation is convenient.

[0067] 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 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 arranged on the caster frame, and an auxiliary brake member is arranged at the bottom thereof, and the auxiliary brake member is inserted into the rotating docking port and extends to the inner cavity of the caster frame; A double brake assembly is rotatably disposed in the inner cavity of the caster frame, a first brake member is disposed at the front end thereof, and a second brake member corresponding to the auxiliary brake member is disposed at the rear end thereof; A brake assembly is rotatably arranged at the front end of the caster frame, and a brake plug and a reset plug are extended backwards 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 wheel hub frame is embedded and assembled in the first installation groove. The roller shaft passes through the wheel hub frame, and a socket is provided on the side of the wheel 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 inserted or sleeved on the top edge of the caster frame, and the inner wall of the top edge is connected to the rotating 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 rotating docking port. A stepped plug-in block is arranged at the bottom of the connecting rod and is inserted 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, and a cavity is formed between adjacent brake blocks. Brake strips are arranged at intervals on the brake blocks, and the bottom surface of the brake strips is an arc surface that partially matches the surface of the moving tire. A convex rib abutting against the first brake component is arranged at the bottom of the brake assembly.

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 a supporting 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 toothed ring is arranged at the bottom of the auxiliary brake member, and a plurality of toothed elements are arranged at intervals along the circumference of the toothed ring. The second brake member is an annular structure, and a tooth groove corresponding to the toothed element is opened 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 double 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 set 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 arranged 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 are sequentially extended downward from the bottom of the reset component, the first positioning groove is formed between the first protruding block and the second protruding block, the 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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