Brake structure of mute universal trundle

Abstract

The utility model discloses a brake structure of a mute universal trundle. The brake structure comprises a mounting seat, a pulley and a brake wrench, the two pulleys are pivoted to the two sides of the mounting base respectively, positioning pieces are arranged on the sides, corresponding to hubs, of the two pulleys, and the multiple positioning pieces are annularly distributed on the peripheries of the hubs at intervals; the brake wrench is pivoted on the mounting seat and located between the two pulleys, a brake rod is arranged on the brake wrench, and the two ends of the brake rod correspond to the positioning pieces of the pulleys on the two sides respectively; a locking clamping seat is arranged on the mounting seat along the moving track of the brake rod, the locking clamping seat extrudes the brake rod to position the brake rod, and a locking position and an unlocking position are arranged on the locking clamping seat; the brake wrench rotates with the pivot joint as the center, the brake rod moves to the locking position, and at the moment, the two ends of the brake rod enter the positions between the positioning pieces of the pulleys on the two sides respectively so as to lock the pulleys; the brake wrench rotates reversely, the brake rod moves to the unlocking position, and at the moment, the two ends of the brake rod are separated from the position between the positioning pieces so as to unlock the pulley.

Description

Technical Field

[0001] The utility model relates to the technical field of casters, in particular to a brake structure of a silent universal caster. Background Art

[0002] In modern life, portable storage cabinets, storage boxes, and carts are widely used for their convenience and flexibility. These items are often equipped with swivel casters for easy movement and steering. However, when these items need to be secured, such as to prevent a cabinet from sliding during transport or a cart from moving when parked, brakes are required on the casters.

[0003] Currently, there are various universal wheel brake structures on the market, but many of them do not provide satisfactory braking effects. Some brake structures may have problems such as weak braking and easy loosening, resulting in failure to achieve the expected effect when fixing is required. Utility Model Content

[0004] The purpose of the utility model is to provide a brake structure of a silent universal caster, which can effectively lock and unlock the pulley, ensuring that the universal wheel can stably stop moving when needed and can rotate freely when not needed.

[0005] To achieve the above-mentioned purpose, the solution of the present invention is: a brake structure of a silent universal caster, comprising a mounting seat, a pulley and a brake wrench;

[0006] The two pulleys are pivotally connected to the two sides of the mounting base, and the corresponding sides of the wheel hubs of the two pulleys are provided with positioning pieces, and a plurality of positioning pieces are distributed in an annular shape and at intervals on the outer circumference of the wheel hubs; the brake wrench is pivotally connected to the mounting base and is located between the two pulleys, and the brake wrench is provided with a brake lever, and the two ends of the brake lever correspond to the positioning pieces of the pulleys on both sides respectively;

[0007] A locking seat is provided on the mounting seat along the running track of the brake rod, and the locking seat squeezes the brake rod to position it, and the locking seat is provided with a locking position and an unlocking position;

[0008] The brake wrench rotates around the pivot joint to move the brake lever to the locked position. At this time, the two ends of the brake lever enter between the positioning pieces of the pulleys on both sides to lock the pulleys; the brake wrench rotates in the opposite direction to move the brake lever to the unlocked position. At this time, the two ends of the brake lever come out from between the positioning pieces to unlock the pulleys.

[0009] Furthermore, the locking socket is fish-mouth shaped, the upper end of the brake wrench is pivotally connected to the upper wing of the locking socket, the brake rod of the brake wrench slides along the lower wing surface of the locking socket with the brake shaft as the center, and the upper and lower wings of the brake wrench squeeze the brake rod to position it.

[0010] Further, the upper wing of the locking seat is provided with a first brake shaft hole, the upper end of the brake handle is provided with a second brake shaft hole, and a brake shaft is inserted into the concentric first brake shaft hole and the second brake shaft hole to connect the locking seat and the brake handle.

[0011] Further, the lower wing surface of the locking seat is sequentially provided with a locking position, a transition slide and an unlocking position from the outer periphery to the center, and the three are in the form of arc lines with different curvatures, the brake lever enters the unlocking position from the locking position along the transition slide, and vice versa.

[0012] Further, the brake lever of the brake handle is in the form of a cylinder.

[0013] Further, the hub of the pulley is formed with a free area and a positioning area concentrically from the center to the outer periphery, and the positioning piece is arranged in the positioning area; the brake lever is located in the free area, and the pulley is unlocked, while the brake lever enters the positioning area, and the pulley is locked.

[0014] Further, the outer side of the brake handle is provided with an anti-skid part.

[0015] Further, the upper portion of the mounting seat is connected with a main rotating shaft assembly, the main rotating shaft assembly comprises a main shaft and an inner iron rod of the main shaft, the main shaft is provided with a main shaft iron rod hole, and the inner iron rod of the main shaft is inserted into the main shaft iron rod hole.

[0016] Further, the outer periphery of the pulley is wrapped with a soft plastic layer.

[0017] Further, the mounting seat is provided with a main horizontal shaft hole, and the pulleys on the left and right sides are each provided with a pulley horizontal shaft hole, a horizontal shaft is arranged in the main horizontal shaft hole, and the two ends are connected with the pulley horizontal shaft holes on the left and right sides.

[0018] After the above scheme is adopted, the beneficial effects of the present application are as follows:

[0019] The brake structure of the mute universal trundle can effectively lock and unlock the pulley, and ensure that the universal wheel can be stably stopped when needed, and can be freely rotated when not needed. Specifically, the brake structure realizes effective control of the pulley by designing the brake handle and the brake lever, and the locking seat and the positioning piece on the pulley. When braking, the brake lever can be firmly clamped between the positioning pieces of the pulley to prevent the pulley from rotating; when unlocking, the brake lever can smoothly come out from between the positioning pieces, so that the pulley restores free rotation. The deformation of the locking seat tightly presses the brake lever, and the brake lever is positioned and supported throughout the process, so that the brake lever cannot be shaken randomly in the brake state and the unlocking state, and the normal use of the pulley is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1is a brake structure schematic view of a silent universal caster of an embodiment of the utility model;

[0021] Figure 2 is a brake structure exploded view of a silent universal caster of an embodiment of the utility model;

[0022] Figure 3 is a mounting seat and brake wrench structure schematic view of an embodiment of the utility model;

[0023] Figure 4 is a pulley structure schematic view of an embodiment of the utility model;

[0024] Figure 5 is a pulley in the unlocking state schematic view of an embodiment of the utility model;

[0025] Figure 6 is a pulley in the locking state schematic view of an embodiment of the utility model.

[0026] Label explanation:

[0027] 1, mounting seat;11, main cross shaft hole;12, main shaft hole;

[0028] 2, locking seat;21, upper wing;22, lower wing;23, first brake shaft hole;24, locking position;25, transition slide;26, unlocking position;

[0029] 3, pulley;31, pulley cross shaft hole;32, soft plastic layer;33, hub;34, positioning sheet;35, limiting groove;

[0030] 4, brake wrench;41, brake lever;42, second brake shaft hole;43, anti-skid part;

[0031] 5, cross shaft;6, brake shaft;

[0032] 7, main rotating shaft assembly;71, main shaft;711, main shaft iron rod hole;72, main shaft inner iron rod. Specific embodiments

[0033] The utility model is described in detail below in combination with the drawings and specific embodiments.

[0034] The utility model provides a kind of brake structure of silent universal caster, as shown in Figures 1 to 6 Including mounting seat 1, pulley 3 and brake wrench 4.

[0035] As shown in Figure 2As shown, the mounting base 1 is provided with a main transverse axis hole 11, and the left and right pulleys 3 are each provided with a pulley transverse axis hole 31. A transverse axis 5 is inserted through the main transverse axis hole 11, with its ends connected to the pulley transverse axis holes 31 on either side, thereby pivotally connecting the two pulleys 3 to the mounting base 1. To reduce the noise generated by the pulleys 3, the present invention wraps the outer circumference of the pulleys 3 with a soft plastic layer 32. This soft plastic layer not only enhances the structural stability of the pulleys 3 but also effectively absorbs and reduces noise generated when rubbing against the ground, thereby achieving a silent effect and greatly improving user comfort and environmental tranquility.

[0036] like Figure 2 and 4 As shown, a plurality of positioning pieces 34 are provided on the corresponding side of the hub 33 of the two pulleys 3. These positioning pieces 34 are distributed in an annular shape and at intervals on the outer periphery of the hub 33. Specifically, the outer periphery of the hub 33 of the pulley 3 is provided with concentric free areas ( Figure 4 Between the middle ring line c and b) and the positioning area ( Figure 4 Between the middle ring lines b and a), the positioning pieces 34 are arranged in the positioning area, and the limiting grooves 35 are formed between the adjacent positioning pieces 34, which provide a precise locking point for the subsequent braking mechanism.

[0037] The present invention uses a brake wrench 4 to lock and unlock the pulley 3. Figure 2 and Figure 3 As shown, the brake wrench 4 is pivotally connected to the mounting base 1 and is located between the two pulleys 3. The brake wrench 4 is provided with a brake lever 41, which is cylindrical. The two ends of the brake lever 41 correspond to the positioning pieces 34 of the pulleys 3 on both sides. When the brake wrench 4 rotates around the pivot point, the movement trajectory of the brake lever 41 becomes the key to controlling the state of the pulley 3. Specifically, when the brake lever 41 enters the free zone, the pulley 3 is in an unlocked state of free rotation; and when the brake lever 41 enters the positioning zone and is embedded in the limit groove 35, the pulley 3 is effectively locked and cannot rotate.

[0038] Since the brake wrench 4 is pivotally connected to the mounting base 1, the brake lever 41 needs to be stably positioned and guided during rotation. Therefore, the present invention provides a locking seat 2 on the mounting base 1 along the running track of the brake lever 41. Figure 2 and Figure 3As shown, the locking seat 2 is fish mouth shaped, the upper wing 21 of the locking seat 2 is provided with a first brake shaft hole 23, the upper end of the brake handle 4 is provided with a second brake shaft hole 42, and a brake shaft 6 is inserted into the concentric first brake shaft hole 23 and the second brake shaft hole 42, so as to pivot the brake handle 4 on the locking seat 2. In the process of rotating the brake handle 4, the brake lever 41 will slide along the surface of the lower wing 22 of the locking seat 2. In order to ensure the stability and accuracy of the brake lever 41, the upper wing 21 and the lower wing 22 of the locking seat 2 are positioned and supported throughout the process by extruding the brake lever 41.

[0039] The lower wing 22 of the locking seat 2 is made of a deformable material and has a certain elasticity and restoring force. The surface of the lower wing 22 of the locking seat 2 is provided with three sliding tracks, which are the locking position 24, the transition sliding track 25 and the unlocking position 26 from the outer periphery to the center, and the three are arc-shaped with different curvatures. The locking position 24 is located at the outermost side, and the arc-shaped design is relatively steep to provide sufficient locking force to ensure that the brake lever 41 can stably stay in this position when locked, preventing the pulley 3 from moving accidentally when it is not needed to rotate. The transition sliding track 25 is located between the locking position 24 and the unlocking position 26, and the arc-shaped design is relatively flat, which plays a smooth transition role, so that the brake lever 41 can slide more smoothly from the locking position 24 to the unlocking position 26. The unlocking position 26 is located at the innermost side, and the arc-shaped design is slightly steeper than the transition sliding track 25. The arc-shaped track design with different curvatures not only enables the brake lever 41 to slide smoothly between the sliding tracks, but also effectively limits the brake lever 41 through the change of curvature to prevent it from easily leaving the current sliding track without external driving force. Only when the user applies sufficient external driving force through the brake handle 4, the brake lever 41 will overcome the elastic force of the lower wing 22 of the locking seat 2, leave the current sliding track and enter another sliding track, so as to realize the locking and unlocking functions of the pulley 3.

[0040] When the brake lever 41 is in the unlocking position 26, the two ends of the brake lever 41 are located in the free area of the pulley 3, and the sliding is in the unlocked state of free sliding; if braking is needed, the handle is pulled upward, the brake lever 41 moves around the brake shaft 6, and extrudes the locking seat 2 to cause slight deformation, enters the locking position 24 along the transition sliding track 25, and the two ends of the brake lever 41 enter between the positioning pieces 34 of the positioning area of the pulley 3, at this time the pulley 3 is in the locked state of not being able to slide under the restriction of the brake lever 41 and the positioning pieces 34, and the upper wing 21 and the lower wing 22 of the locking seat 2 continuously extrude the brake lever 41, so that the brake lever 41 will not easily slide out of the positioning area;

[0041] If it needs to be unlocked again, the wrench is pulled down, the brake lever 41 extrudes the lock seat 2 to make it slightly deform, enters the unlocking position 26 along the transition slide 25, and the two ends of the brake lever 41 are separated from the positioning area of the pulley 3 to enter the free area, at this time the pulley 3 is in the unlocked state of free sliding, and the upper wing 21 and the lower wing 22 of the lock seat 2 continuously extrude the brake lever 41, so that the brake lever 41 cannot easily slide out of the unlocking area.

[0042] As shown in Figure 2 and Figure 3 , the outer side of the brake wrench 4 is provided with an anti-skid part 43. The anti-skid part 43 can adopt a material or structure that can effectively increase the friction, such as protruding particles, textures or rubber coating, etc. These designs can significantly improve the friction between the user's hand and the brake wrench 4, and prevent the phenomenon of hand slipping during emergency braking or long-time operation.

[0043] In addition, as shown in Figure 1 , the upper part of the mounting seat 1 is connected with a main rotating shaft assembly 7. The main function of this assembly is to stably install the universal caster to the box body, cabinet body or other equipment that needs to be moved, while ensuring that the caster can freely rotate relative to these equipment, so as to realize flexible mobility. As shown in Figure 2 , the main rotating shaft assembly 7 includes a main shaft 71 and a main shaft inner iron rod 72, the main shaft 71 is inserted into the main shaft hole 12 at the upper part of the mounting seat 1, the main shaft 71 is provided with a main shaft iron rod hole 711, and the main shaft inner iron rod 72 is inserted into the main shaft iron rod hole 711 and tightly combined with the main shaft 71, forming a stable and flexible rotating unit.

[0044] To further illustrate the embodiments, the utility model provides drawings. These drawings are part of the disclosure of the utility model, which mainly serves to illustrate the embodiments, and can be combined with the related description of the specification to explain the operating principle of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible embodiments and the advantages of the utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0045] Meanwhile, the front, back, left, right and other directions involved in the present embodiment are only used as a reference for the direction, and do not represent the actual direction in use. In addition, the terms "first", "second", "third" are only used for description purposes, and cannot be understood as indicating or implying relative importance.

[0046] The above is only a preferred embodiment of the utility model, and is not a limitation on the design of the utility model. Any equivalent changes made according to the key design of the utility model shall fall within the protection scope of the utility model.

Claims

1. A brake structure for a silent universal caster, characterized by: Includes mounting bracket, pulley and brake wrench; The two pulleys are pivotally connected to the two sides of the mounting base, and the corresponding sides of the wheel hubs of the two pulleys are provided with positioning pieces, and a plurality of positioning pieces are distributed in an annular shape and at intervals on the outer circumference of the wheel hubs; the brake wrench is pivotally connected to the mounting base and is located between the two pulleys, and the brake wrench is provided with a brake lever, and the two ends of the brake lever correspond to the positioning pieces of the pulleys on both sides respectively; A locking seat is provided on the mounting seat along the running track of the brake rod, and the locking seat squeezes the brake rod to position it, and the locking seat is provided with a locking position and an unlocking position; The brake wrench rotates around the pivot joint to move the brake lever to the locked position. At this time, the two ends of the brake lever enter between the positioning pieces of the pulleys on both sides to lock the pulleys; the brake wrench rotates in the opposite direction to move the brake lever to the unlocked position. At this time, the two ends of the brake lever come out from between the positioning pieces to unlock the pulleys.

2. The brake structure of a silent universal caster according to claim 1, characterized in that: The locking seat is in a fish-mouth shape, the upper end of the brake wrench is pivotally connected to the upper wing of the locking seat, the brake rod of the brake wrench slides along the lower wing surface of the locking seat with the brake shaft as the center, and the upper and lower wings of the brake wrench squeeze the brake rod to position it.

3. The brake structure of a silent universal caster according to claim 2, characterized in that: The upper wing of the locking seat is provided with a first brake shaft hole, the upper end of the brake wrench is provided with a second brake shaft hole, and a brake shaft is inserted into the concentric first and second brake shaft holes to connect the locking seat and the brake wrench.

4. The brake structure of a silent universal caster according to claim 2, characterized in that: The lower wing surface of the locking seat is provided with a locking position, a transition slide and an unlocking position in sequence from the outer circumference to the center of the circle. The three are arc-shaped with different curvatures. The brake lever moves from the locking position along the transition slide to the unlocking position. Conversely, the brake lever moves from the unlocking position along the transition slide to the locking position.

5. The brake structure of a silent universal caster according to claim 1, characterized in that: The brake lever of the brake wrench is cylindrical.

6. The brake structure of a silent universal caster according to claim 1, characterized in that: The outer periphery of the pulley hub forms a concentric free zone and a positioning zone from the center to the periphery, and the positioning piece is arranged in the positioning zone; when the brake lever is located in the free zone, the pulley is unlocked, and when the brake lever enters the positioning zone, the pulley is locked.

7. The brake structure of a silent universal caster according to claim 1, characterized in that: An anti-slip portion is provided on the outer side of the brake wrench.

8. The brake structure of a silent universal caster according to claim 1, characterized in that: A main rotating shaft assembly is connected above the mounting seat. The main rotating shaft assembly includes a main shaft and a main shaft inner iron rod. A main shaft iron rod hole is opened on the main shaft, and the main shaft inner iron rod is inserted into the main shaft iron rod hole.

9. The brake structure of a silent universal caster according to claim 1, characterized in that: The outer periphery of the pulley is wrapped with a soft plastic layer.

10. The brake structure of a silent universal caster according to claim 1, characterized in that: A main transverse axis hole is provided on the mounting seat, and pulley transverse axis holes are provided on the pulleys on the left and right sides. A transverse axis is inserted into the main transverse axis hole, and its two ends are respectively connected to the pulley transverse axis holes on both sides.

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