Trundle brake structure internally provided with tooth structure

Abstract

The utility model discloses a trundle brake structure internally provided with a tooth structure, which comprises a roller, a gear groove, a tooth structure and a tooth structure, and is characterized in that the side surface is provided with the gear groove; a caster carrier; the mounting seat is connected to the top of the trundle frame through a connecting rod seat; the connecting rod is arranged on the connecting rod seat in a penetrating manner; the bottom of the connecting rod is movably sleeved with the brake part, a limiting ring is arranged on the connecting rod, one side of the brake part is rotationally sleeved with a first connecting shaft in the trundle frame, the portion, on the outer side of the idler wheel, of the bottom of the brake part extends to form a swing arm, the bottom of the swing arm extends inwards to form a sleeve part, and the sleeve part corresponds to the tooth-shaped structure on the edge of the gear groove. According to the utility model, the connecting rod is driven to realize the rotation of the brake piece, the waist-shaped hole is subjected to adaptive adjustment of two movable linkage modes, the sleeve piece is driven to move outwards, the radial side surface of the tooth-shaped structure is sleeved, the circumferential braking of the roller is realized, and the position design of the gear groove and the arrangement of the end face gear structure are matched, so that the roller tire is not damaged, and the roller is not slipped to be braked; and sufficient braking of the trundle is ensured, the state is flexible, and switching is convenient.

Description

Technical Field

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

[0002] Casters are commonly used on transport vehicles such as carts, mobile scaffolding, and workshop trucks. They consist of a wheel and a frame, with the wheel rotatably mounted on the frame. Depending on the type of frame, casters are categorized as fixed casters and swivel casters. Fixed casters have a frame that is directly fixed to the vehicle frame, preventing them from changing direction. Swivel casters have a frame that is rotatably connected to an upper frame and a lower frame. The wheel is rotatably mounted on the lower frame, while the upper frame is fixed to the vehicle frame. The relative rotation of the upper and lower frames allows the swivel caster to adjust its direction of transport.

[0003] Conventional caster wheels typically brake using friction between the brake components and the wheel surface, or by engaging the tire tread. This braking method is suitable for light-load vehicles. However, industrial casters are typically used with heavy loads, and the positive pressure exerted by the brake components on the wheel is relatively small, making it difficult to generate significant braking friction. This can cause significant damage to the tire and can lead to slippage, shortening its service life. For example, Chinese patent application number CN1 17644743B provides a brake caster, comprising a caster body including a caster bracket, a roller rotatably mounted on the caster bracket, and a brake mechanism mounted on the caster bracket. The brake mechanism comprises a first caster fixed shaft and a second caster fixed shaft extending through the caster bracket, a first caster rotating portion rotatably mounted on the first caster fixed shaft, a third caster fixed shaft extending through the first caster rotating portion, a second caster rotating portion rotatably mounted on the second caster fixed shaft, and a fourth caster fixed shaft extending through the second caster rotating portion. A third caster rotating portion is rotatably mounted between the third and fourth caster fixed shafts, and a return spring is mounted on the caster body. The caster bracket, the first caster rotating portion, the second caster rotating portion, and the third caster rotating portion form a four-bar linkage structure, which is highly stable, less prone to deformation, and provides good braking performance. However, the practical problems noted above still exist. Utility Model Content

[0004] The purpose of the utility model is to provide a caster brake structure with an internal tooth structure in order to solve the problem that common caster brake structures and methods have poor braking effect, cause great damage to caster tires, and reduce the service life of the caster.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a caster brake structure with an internal tooth structure, comprising:

[0006] The roller has a gear groove extending inwardly from its side surface;

[0007] A caster frame, the bottom of which is sleeved on the side of the roller and is rotatably connected to the roller via a rotating shaft;

[0008] A mounting seat, which is connected to the top of the caster frame through a connecting rod seat and has a plurality of balls arranged between the caster frame;

[0009] A connecting rod, which is passed through the connecting rod seat;

[0010] The brake component is movably sleeved on the bottom of the connecting rod, and the connecting rod is provided with limit rings on the upper and lower end surfaces of the top of the brake component. One side of the brake component is rotatably sleeved on the first connecting shaft in the caster frame. The bottom of the brake component is provided with a swing arm extending on the outside of the roller, and a kit is extended inward from the bottom of the swing arm, and the kit corresponds to the tooth structure of the edge of the gear groove.

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

[0012] The toothed structure of the gear groove edge is arranged on the hub edge of the roller.

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

[0014] The connecting rod seat is an I-shaped structure and is embedded in the caster frame and the mounting seat.

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

[0016] A relief hole corresponding to the limiting ring on the top of the connecting rod is provided at the center of the bottom surface of the connecting rod seat, and an end face gear structure extends outward from the relief hole.

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

[0018] A waist-shaped hole is provided on the brake component, and the connecting rod is movably inserted into the waist-shaped hole.

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

[0020] A connecting ear is provided on one side of the brake component, and the through hole on the connecting ear is tightly rotatably sleeved on the first connecting shaft. The outer end of the connecting ear abuts against the second connecting shaft in the caster frame. A torsion spring is sleeved on the first connecting shaft, and one end of the torsion spring abuts against the second connecting shaft, and the other end is positioned on the brake component.

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

[0022] The kit is a U-shaped structure, and a slot is formed inside the kit corresponding to the tooth-shaped structure of the edge of the gear slot.

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

[0024] Beneficial effects:

[0025] 1. This utility model uses a driving connecting rod to rotate the brake element. The waist-shaped hole allows for adaptive adjustment of two movable linkage modes, driving the assembly to move outward and engage the radial side of the toothed structure to achieve circumferential braking of the roller. The driving connecting rod and the torsion spring reset the structure, transitioning the caster from a braked state to a movable state. Compared to common wheel friction braking and tread engagement braking methods, this method does not damage the roller tire or cause the roller to slip, ensuring sufficient braking and stopping of the caster and a long service life.

[0026] 2. The toothed structure on the edge of the gear groove is arranged on the edge of the hub of the roller, thereby ensuring a sufficiently large distance between the joint between the kit and the toothed structure and the roller shaft, so that the roller requires a sufficiently large torque to achieve rotation in the brake state, thereby improving the brake effect; an avoidance hole corresponding to the limit ring on the top of the connecting rod is provided in the center of the bottom surface of the connecting rod seat, and an end face gear structure extends to the outside of the avoidance hole. In the brake state, by reducing the contact area between the connecting rod seat and the brake part, the brake part is fully contacted, and the connecting rod and the brake part are pressed tightly to avoid loosening of the movable connection between the two, thereby further improving the brake effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 The figure is a schematic diagram of the structure of a caster brake structure with a tooth structure inside.

[0029] Figure 2 This is a front cross-sectional view of a caster brake structure with an internal tooth structure.

[0030] Figure 3 The diagram is a structural diagram of the connection structure of the roller, connecting rod and brake part in a caster brake structure with an internal tooth structure.

[0031] Figure 4 The figure is a schematic diagram of the structure of a brake component in a caster brake structure with an internal tooth structure.

[0032] Legend:

[0033] 1. Roller; 11. Gear slot; 2. Caster frame; 21. First connecting shaft; 22. Second connecting shaft; 23. Torsion spring; 3. Connecting rod seat; 31. End gear structure; 4. Mounting seat; 5. Connecting rod; 51. Limiting ring; 6. Brake part; 61. Waist-shaped hole; 62. Connecting ear; 621. Through hole; 63. Swing arm; 631. Kit; 632. Slot. DETAILED DESCRIPTION

[0034] 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.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. 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. Therefore, they cannot be understood as limitations on the present invention.

[0036] Example 1:

[0037] See also Figure 1-4 The utility model provides a technical solution: a caster brake structure with an internal tooth structure, comprising:

[0038] The roller 1 has a gear groove 11 extending inwardly from its side surface;

[0039] The caster frame 2 has a bottom portion sleeved on the side of the roller 1 and is rotatably connected to the roller 1 via a rotating shaft;

[0040] The mounting base 4 is connected to the top of the caster frame 2 through the connecting rod base 3 and a plurality of balls are arranged between the caster frame 2; this design can improve the relative rotation smoothness of the caster frame 2 and the mounting base 4, and realize the universal movement function of the caster:

[0041] A connecting rod 5 is provided on the connecting rod seat 3;

[0042] The brake member 6 is movably sleeved on the bottom of the connecting rod 5. The connecting rod 5 is provided with a limit ring 51 on the upper and lower end surfaces of the top of the brake member 6. One side of the brake member 6 is rotatably sleeved on the first connecting shaft 21 in the caster frame 2. The bottom of the brake member 6 is provided with a swing arm 63 extending from the outside of the roller 1. The bottom of the swing arm 63 is provided with a sleeve 631 extending inwardly. The sleeve 631 corresponds to the tooth-shaped structure on the edge of the gear groove 11. The above-mentioned structure can be driven by manually pressing the connecting rod directly, and the limit ring 51 is engaged with the avoidance hole of the connecting rod seat 3 to achieve the structural setting when the caster is in the brake state. It can also be achieved by connecting the connecting rod 5 to an external linkage mechanism, operating the linkage mechanism to realize the lifting and lowering of the connecting rod 5, and through the structural locking of the linkage mechanism, the positioning of the caster structure is realized, and the stable braking and active state switching and maintenance of the caster are achieved.

[0043] The connecting rod seat 3 is an I-shaped structure, and the connecting rod seat 3 is embedded in the caster frame 2 and the mounting seat 4. The middle part of the connecting rod seat 3 is passed through the caster frame 2 and the mounting seat 4, and its upper and lower protrusion structures abut against the outer end surfaces of the caster frame 2 and the mounting seat 4, thereby improving the assembly stability of the caster frame 2, the mounting seat 4 and the ball.

[0044] The brake member 6 is provided with a waist-shaped hole 61 , and the connecting rod 5 can be movably inserted into the waist-shaped hole 61 , thereby achieving smooth coordination of the structural movement of the connecting rod 5 lifting and lowering and driving the brake member 6 to rotate, thereby avoiding structural interference problems.

[0045] A connecting ear 62 is provided on one side of the brake component 6, and the through hole 621 on the connecting ear 62 is tightly rotatably sleeved on the first connecting shaft 21. The outer end of the connecting ear 62 abuts against the second connecting shaft 22 in the caster frame 2. A torsion spring 23 is sleeved on the first connecting shaft 21, and one end of the torsion spring 23 abuts against the second connecting shaft 22, and the other end is positioned on the brake component 6 to ensure the rotation stability and reset performance of the brake component 6.

[0046] The kit 631 is a U-shaped structure, and a slot 632 is formed inside the U-shaped structure corresponding to the toothed structure at the edge of the gear slot 11 . The circumferential braking of the roller 1 is achieved by the sleeve connection of the kit 631 to the radial side of the toothed structure.

[0047] Example 2:

[0048] On the basis of the above-mentioned embodiment 1, preferably, the toothed structure on the edge of the gear groove 11 is arranged on the edge of the hub of the roller 1, thereby ensuring a sufficiently large distance between the joint between the kit 631 and the toothed structure and the rotating shaft of the roller 1, so that the roller 1 requires a sufficiently large torque to achieve rotation in the brake state, thereby improving the brake effect.

[0049] Example 3:

[0050] On the basis of the above-mentioned embodiment 1, preferably, an avoidance hole corresponding to the limiting ring 51 at the top of the connecting rod 5 is provided in the center of the bottom surface of the connecting rod seat 3, and an end face gear structure 31 extends outside the avoidance hole. In the braking state, by reducing the abutment area between the connecting rod seat 3 and the brake component 6, the brake component 6 is fully abutted, and the connecting rod 5 and the brake component 6 are pressed tightly to avoid loosening of the movable connection between the two, thereby further improving the braking effect.

[0051] The working principle of a caster brake structure with an internal tooth structure in this embodiment includes: when the caster needs to be braked, the connecting rod 5 is indirectly lifted or directly lifted with the help of an external linkage mechanism, so that the brake part 6 rotates synchronously along the first connecting shaft 21, and the connecting rod 5 and the brake part 6 are relatively adaptively rotated and telescopically adjusted through the waist-shaped hole 61. At the same time, the swing arm 63 swings, and the kit 631 moves outward and is sleeved on the tooth structure at the edge of the gear groove 11. The end gear structure 31 abuts the top surface of the brake part 6, so that the connecting rod 5 and the brake part 6 are fixed, and the linkage mechanism is locked or the limit ring 51 is engaged with the avoidance hole of the connecting rod seat 3 to achieve structural positioning, stable locking of the roller 1, and braking of the caster; when the caster needs to be moved, the driving connecting rod 5 moves downward, so that the brake part 6 is disengaged from the connecting rod seat 3, and the kit 631 is disengaged from the tooth structure of the gear groove 11 and retracted into the gear groove 11, that is, the roller 1 can rotate and the caster can move.

[0052] In summary, due to the adoption of the above technical solution, the caster brake structure with an internal tooth structure of this embodiment has the following beneficial effects compared with the prior art:

[0053] 1. This utility model uses a driving connecting rod to rotate the brake element. The waist-shaped hole allows for adaptive adjustment of two movable linkage modes, driving the assembly to move outward and engage the radial side of the toothed structure to achieve circumferential braking of the roller. The driving connecting rod and the torsion spring reset the structure, transitioning the caster from a braked state to a movable state. Compared to common wheel friction braking and tread engagement braking methods, this method does not damage the roller tire or cause the roller to slip, ensuring sufficient braking and stopping of the caster and a long service life.

[0054] 2. The toothed structure on the edge of the gear groove is arranged on the edge of the hub of the roller, thereby ensuring a sufficiently large distance between the joint between the kit and the toothed structure and the roller shaft, so that the roller requires a sufficiently large torque to achieve rotation in the brake state, thereby improving the brake effect; an avoidance hole corresponding to the limit ring on the top of the connecting rod is provided in the center of the bottom surface of the connecting rod seat, and an end face gear structure extends to the outside of the avoidance hole. In the brake state, by reducing the contact area between the connecting rod seat and the brake part, the brake part is fully contacted, and the connecting rod and the brake part are pressed tightly to avoid loosening of the movable connection between the two, thereby further improving the brake effect.

[0055] 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 caster brake structure with an internal tooth structure, characterized in that: include: The roller has a gear groove extending inwardly from its side surface; A caster frame, the bottom of which is sleeved on the side of the roller and is rotatably connected to the roller via a rotating shaft; A mounting seat, which is connected to the top of the caster frame through a connecting rod seat and has a plurality of balls arranged between the caster frame; A connecting rod, which is passed through the connecting rod seat; A brake member is movably sleeved on the bottom of the connecting rod, and the connecting rod is provided with limit rings on the upper and lower end surfaces of the top of the brake member. One side of the brake member is rotatably sleeved on the first connecting shaft in the caster frame. A swing arm extends from the bottom of the brake member to the outside of the roller, and a sleeve extends inward from the bottom of the swing arm, and the sleeve corresponds to the tooth structure on the edge of the gear groove; The connecting rod seat is an I-shaped structure, and the connecting rod seat is embedded in the caster frame and the mounting seat; A waist-shaped hole is provided on the brake component, and the connecting rod is movably inserted into the waist-shaped hole.

2. The caster brake structure with an internal tooth structure according to claim 1, characterized in that: The toothed structure of the gear groove edge is arranged on the hub edge of the roller.

3. The caster brake structure with an internal tooth structure according to claim 1, characterized in that: A relief hole corresponding to the limiting ring on the top of the connecting rod is provided at the center of the bottom surface of the connecting rod seat, and an end face gear structure extends outward from the relief hole.

4. The caster brake structure with an internal tooth structure according to claim 1, characterized in that: A connecting ear is provided on one side of the brake component, and the through hole on the connecting ear is tightly rotatably sleeved on the first connecting shaft. The outer end of the connecting ear abuts against the second connecting shaft in the caster frame. A torsion spring is sleeved on the first connecting shaft, and one end of the torsion spring abuts against the second connecting shaft, and the other end is positioned on the brake component.

5. The caster brake structure with an internal tooth structure according to claim 1, characterized in that: The kit is a U-shaped structure, and a slot is formed inside the kit corresponding to the tooth-shaped structure of the edge of the gear slot.

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