Load-bearing trundle with height adjusting and damping functions

Abstract

The utility model discloses a load-bearing trundle with height adjusting and damping functions, which comprises a trundle bracket, a damping roller, a trundle shaft, a side bracket plate and a height adjusting load-bearing device, the side support plates are provided with long-strip-shaped holes in the vertical direction, the two side support plates are divided into the left side support plate and the right side support plate, and the left side support plate and the right side support plate are connected with the side edges of the trundle support respectively. The damping idler wheel is located between the left side support plate and the right side support plate, the trundle shaft penetrates through a long-strip-shaped hole of the left side support plate, the damping idler wheel and a long-strip-shaped hole of the right side support plate, and check rings are arranged at the two ends of the trundle shaft for limiting; the portions, between the left support plate and the damping rollers and between the right support plate and the damping rollers, of the trundle shafts are connected with the trundle supports through height adjusting bearing devices, and the trundle shafts can move up and down in the long-strip-shaped holes. The side support plate is provided with the long-strip-shaped hole and is matched with the height adjusting bearing device, so that the trundle has the height adjusting function, and the requirement of large devices or engineering products for the assembly error-tolerant rate can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of shock-absorbing casters, in particular to a load-bearing caster with height adjustment and shock-absorbing functions. Background Art

[0002] Existing shock-absorbing casters use spring dampers for cushioning and vibration reduction. However, these springs fatigue when stationary for extended periods. Furthermore, the immense pressure required for heavy-duty, load-bearing casters makes installation difficult and height adjustment impossible. In engineering applications or large equipment, where cumulative tolerances are significant, increased adjustment tolerance is desirable to improve fault tolerance and avoid spring replacement.

[0003] Disadvantages of existing casters: 1. Small load-bearing capacity of a single wheel; 2. Shock absorption effect cannot meet production needs, or there is no shock absorption; 3. Casters with shock absorption function do not have height adjustment; 4. The durability of other rubber casters is far inferior to that of polyurethane.

[0004] Announcement No.: CN217124432U discloses a novel cast iron caster, comprising a wheel and a support leg. The wheel comprises a polyurethane layer, a cast iron wheel core, and a bearing. The polyurethane layer is coated on the exterior of the cast iron wheel core. The bearing is disposed in the center of the cast iron wheel core. The inner ring of the bearing is provided with an extended sleeve, which is integrally formed with the inner ring of the bearing. The extended sleeve includes a first end and a second end, which extend beyond either side of the bearing. The wheel is rotatably connected to the support leg. Although this patent achieves shock absorption by eliminating the use of springs, the complex design of the bearing and universal joints prevents it from achieving high load-bearing capacity, height adjustment, and fault tolerance for large-scale installations.

[0005] Publication No. CN219312420U discloses a shock-absorbing caster comprising: a roller assembly; a bracket mounted vertically to one side of the roller assembly, a mounting seat mounted on the top of the bracket, a first rotating shaft mounted at the bottom of the bracket, and the roller assembly rotatably mounted on the first rotating shaft; and a shock-absorbing mechanism mounted vertically to the side of the bracket away from the roller assembly, the bottom end of the shock-absorbing mechanism being mounted on the roller assembly. Although this patent can achieve shock absorption and load-bearing properties, the spring pressure required for the load-bearing caster is extremely high, making its installation very difficult and preventing height adjustment. Therefore, this patent is only applicable to occasions and products with lighter loads and does not provide height adjustment.

[0006] Announcement No.: CN218536213U discloses a shock-absorbing caster, comprising a fixed seat, a rotating seat rotatably disposed at the bottom of the fixed seat, a first bracket connected to the rotating seat, a second bracket rotatably connected to the first bracket, and a roller rollably disposed on the second bracket. At least one buffer spring is disposed between the first bracket and the second bracket. The first bracket is provided with a bottom plate, and the second bracket is provided with a top plate. The lower end of the buffer spring abuts against the bottom plate, and the upper end of the buffer spring abuts against the top plate. When the caster vibrates, the compression of the buffer spring reduces shock and cushions the caster. Although this patent can achieve shock absorption, it still uses a spring, which limits its load-bearing capacity and installation. In addition, its mounting chassis is limited and height adjustment is impossible. Utility Model Content

[0007] In response to the above-mentioned defects in the prior art, the purpose of the present utility model is to provide a load-bearing caster with height adjustment and shock absorption functions, which can reduce the vibration of the product during transportation and realize the load-bearing function, share the weight of the far end of the transported object, or avoid damage to the transported body due to vibration of heavy movable equipment during transportation, and effectively reduce noise, and then be applied to heavy door leaves and heavy movable equipment.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A load-bearing caster with height adjustment and shock-absorbing functions, comprising a caster bracket, a shock-absorbing roller, a caster shaft, and also a side bracket plate and a height-adjusting load-bearing device; the side bracket plate is provided with a vertically extending long hole, and the side bracket plate is provided with two parts, namely a left bracket plate and a right bracket plate, the left bracket plate is connected to the left side of the caster bracket, and the right bracket plate is connected to the right side of the caster bracket; the shock-absorbing roller is located between the left bracket plate and the right bracket plate, and the caster shaft passes through the long hole of the left bracket plate, the shock-absorbing roller, and the long hole of the right bracket plate, and retaining rings are provided at both ends of the caster shaft for limiting; the parts of the caster shaft between the left bracket plate and the shock-absorbing roller and between the right bracket plate and the shock-absorbing roller are connected to the caster bracket through the height-adjusting load-bearing device, and the caster shaft can move up and down in the long hole.

[0010] Furthermore, the caster bracket includes an equipment connecting plate and an adjustment plate;

[0011] Specifically, the height adjustment load-bearing device includes a caster support rod, and a collar is provided at the lower end of the caster support rod for the caster shaft to pass through;

[0012] Specifically, the upper end of the caster support rod passes through the adjustment plate, and the side wall of the caster support rod is provided with a thread covering the adjustment plate and extending to the upper end;

[0013] Specifically, the thread is connected to an upper locking piece above the adjustment plate, and the thread is connected to a lower locking piece below the adjustment plate.

[0014] Furthermore, the upper locking piece includes an upper nut and an upper washer, the lower locking piece includes a lower washer and a lower nut, and the caster support rod, the upper nut and the lower nut are all coarse threads.

[0015] Furthermore, four limiting sleeves are sleeved on the caster shaft to limit the shock-absorbing roller and the caster support rod in the axial direction.

[0016] Furthermore, the caster bracket is an inverted L-shaped plate, the adjustment plate is the horizontal part of the inverted L-shape, the equipment connecting plate is the vertical part of the inverted L-shaped plate, and the equipment connecting plate is provided with an equipment mounting hole for connecting the equipment.

[0017] Furthermore, the caster shaft is made of 45# steel, and a ring groove cooperating with a retaining ring is provided on the caster shaft. The retaining ring is arranged in the ring groove, and an elastic retaining ring is also provided in the ring groove to prevent the retaining ring from falling out.

[0018] Furthermore, the shock-absorbing roller is connected to the caster shaft through a bearing.

[0019] Furthermore, the shock-absorbing roller includes a wheel core and shock-absorbing rubber;

[0020] Specifically, the wheel core is rotatably connected to the caster shaft through a bearing, the wheel core is a steel core or an aluminum core, the shock-absorbing rubber is wrapped around the outer periphery of the wheel core, and the shock-absorbing rubber is polyurethane rubber.

[0021] Furthermore, two to four bearings are provided.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. By using shock-absorbing casters, the wheel core is made of high-strength materials such as steel core or aluminum core. The maximum load-bearing capacity of a single wheel is more than 300kg, and the multi-bearing design can achieve a very high load-bearing capacity.

[0024] 2. The shock-absorbing effect of polyurethane rubber is better than that of springs, which reduces the vibration of the product during movement and realizes the load-bearing function, shares the weight of the far end of the door leaf, or avoids damage to the transport body of heavy movable equipment due to vibration during transportation, effectively reduces noise, and enables the utility model to be applied to heavy door leaves or other heavy movable equipment.

[0025] 3. The side bracket plate is opened with a long hole, which cooperates with the thread processed at the fixed end of the top of the caster support rod, so that the caster has a height adjustment function, which can meet the assembly tolerance requirements of large-scale equipment or engineering products. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of a load-bearing caster with height adjustment and shock absorption functions of the utility model;

[0027] Figure 2 It is a front view of the utility model;

[0028] Figure 3 It is the right view and rear view of the utility model;

[0029] Figure 4 It is a top view and a cross-sectional view of the utility model.

[0030] In the figure: 1. caster bracket; 2. side bracket plate; 3. retaining ring; 4. caster shaft; 5. shock-absorbing roller; 5a. core shaft; 5b. shock-absorbing rubber; 6. caster support rod; 7. upper nut; 8. upper gasket; 9. lower gasket; 10. lower nut; 11. limit sleeve; 12. bearing. DETAILED DESCRIPTION

[0031] 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 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.

[0032] See also Figures 1 to 4 The parts of the caster shaft 4 between the left bracket plate and the shock-absorbing roller 5 and between the right bracket plate and the shock-absorbing roller 5 are all connected to the caster bracket 1 through a height-adjustable load-bearing device, and the caster shaft 4 can move up and down in the elongated hole.

[0033] The caster bracket 1 includes an equipment connecting plate and an adjustment plate. The height adjustment load-bearing device includes a caster support rod 6. A ring is provided at the lower end of the caster support rod 6 for the caster shaft 4 to pass through. The upper end of the caster support rod 6 passes through the adjustment plate. The side wall of the caster support rod 6 is provided with a thread covering the adjustment plate and extending to the upper end. The thread is connected to an upper locking piece above the adjustment plate, and the thread is connected to a lower locking piece below the adjustment plate.

[0034] Among them, the caster bracket 1 is an inverted L-shaped plate, the adjustment plate is the horizontal part of the inverted L-shape, the equipment connecting plate is the vertical part of the inverted L-shaped plate, and the equipment connecting plate is provided with an equipment mounting hole for connecting the equipment; the caster bracket 1 has a load-bearing capacity of more than 300kg, and is welded with the side bracket plate 2 by beveling. The caster bracket 1 is connected by bolts or welded to the vertical mounting surface of heavy equipment, heavy doors and other products.

[0035] The retaining ring 3 is arranged on the caster shaft 4 in a snap-fit ​​manner, so as to limit the axial movement of the caster shaft 4 .

[0036] Among them, the caster shaft 4 is made of 45# steel and is machined. A ring groove is provided on the caster shaft 4 to cooperate with the retaining ring 3. The retaining ring 3 is set in the ring groove. An elastic retaining ring is also provided in the ring groove to prevent the retaining ring 3 from falling out.

[0037] Among them, the shock-absorbing roller 5 includes a wheel core 5a and a shock-absorbing rubber 5b. The wheel core 5a is rotatably connected to the caster shaft 4 through a bearing 12. The wheel core 5a is a steel core or an aluminum core. The shock-absorbing rubber 5b is wrapped around the outer periphery of the wheel core 5a. The shock-absorbing rubber 5b is polyurethane rubber and has the characteristics of high wear resistance and high damping. The maximum load-bearing capacity of the shock-absorbing roller 5 is more than 300 kg.

[0038] Among them, the upper locking part includes an upper nut 7 and an upper gasket 8, and the lower locking part includes a lower gasket 9 and a lower nut 10. The caster support rod 6, the upper nut 7, and the lower nut 10 are all coarse threads.

[0039] Among them, the lower nut 10 is the most easily damaged part in the entire load-bearing caster. According to GB / T 3098.2-2000, Mechanical Properties of Fasteners - Coarse Thread of Nuts, it can be seen that the guaranteed load of the minimum bearing capacity M3-04 grade nut is 1910N. The utility model is equipped with two height-adjustable load-bearing devices. The two lower nuts 10 are directly subjected to force, and the two upper nuts 7 share part of the force through pre-tightening force, which can meet the load-bearing requirements of more than 300kg.

[0040] Among them, four limiting sleeves are sleeved on the caster shaft 4 to axially limit the shock-absorbing roller 5 and the caster support rod 6.

[0041] There are two to four bearings 12 .

[0042] The working mode of the utility model is:

[0043] Weld the caster bracket 1 and the side bracket plate 2 together, and install the bearing 12 into the shock-absorbing roller 5

[0044] Connect the caster support rod 6 to the caster bracket 1, place the shock-absorbing roller 5 between the two caster support rods 6, pass the caster shaft 4 through the long hole, and put the sleeves in one by one during the process. The two sides of the caster shaft 4 are fixed to the side bracket plate 2 through the retaining ring 3 and the elastic snap ring. According to the installation situation, the lower nut 10 and the upper nut 7 on the top of the caster support rod 6 can be rotated to adjust the height.

[0045] All components not discussed in detail in this application and the connection methods of the components in this application are well-known technologies in the technical field and can be directly applied without further explanation.

[0046] In this utility model, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0047] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0048] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A load-bearing caster with height adjustment and shock absorption functions, comprising a caster bracket, a shock-absorbing roller, and a caster shaft, characterized in that: Also includes side support plates, height adjustment load bearing device; The side bracket plate is provided with a vertically extending long hole, and the side bracket plate is provided with two parts, namely a left bracket plate and a right bracket plate, the left bracket plate is connected to the left side of the caster bracket, and the right bracket plate is connected to the right side of the caster bracket; The shock-absorbing roller is located between the left bracket plate and the right bracket plate, and the caster shaft passes through the long hole of the left bracket plate, the shock-absorbing roller, and the long hole of the right bracket plate. Retaining rings are provided at both ends of the caster shaft for limiting; The parts of the caster shaft between the left bracket plate and the shock-absorbing roller and between the right bracket plate and the shock-absorbing roller are connected to the caster bracket through a height adjustment load-bearing device, and the caster shaft can move up and down in the long hole.

2. The load-bearing caster with height adjustment and shock absorption functions according to claim 1, characterized in that: The caster bracket includes an equipment connecting plate and an adjustment plate; The height adjustment load-bearing device includes a caster support rod, and a collar is provided at the lower end of the caster support rod for the caster shaft to pass through; The upper end of the caster support rod passes through the adjustment plate, and the side wall of the caster support rod is provided with a thread covering the adjustment plate and extending to the upper end; The thread is connected to an upper locking piece above the adjustment plate, and the thread is connected to a lower locking piece below the adjustment plate.

3. The load-bearing caster with height adjustment and shock absorption functions according to claim 2, characterized in that: The upper locking piece includes an upper nut and an upper washer, and the lower locking piece includes a lower washer and a lower nut. The caster support rod, the upper nut and the lower nut are all coarse threads.

4. The load-bearing caster with height adjustment and shock absorption functions according to claim 2, characterized in that: Four limiting sleeves are sleeved on the caster shaft to limit the axial direction of the shock-absorbing roller and the caster support rod.

5. The load-bearing caster with height adjustment and shock absorption functions according to claim 2, characterized in that: The caster bracket is an inverted L-shaped plate, the adjustment plate is the horizontal part of the inverted L-shaped plate, the equipment connecting plate is the vertical part of the inverted L-shaped plate, and the equipment connecting plate is provided with an equipment mounting hole for connecting the equipment.

6. The load-bearing caster with height adjustment and shock absorption functions according to claim 1, characterized in that: The caster shaft is made of 45# steel and is provided with a ring groove that cooperates with a retaining ring. The retaining ring is arranged in the ring groove. An elastic retaining ring is also provided in the ring groove to prevent the retaining ring from falling out.

7. The load-bearing caster with height adjustment and shock absorption functions according to claim 1, characterized in that: The shock-absorbing roller is connected to the caster shaft through a bearing.

8. The load-bearing caster with height adjustment and shock absorption functions according to claim 7, characterized in that: The shock-absorbing roller includes a wheel core and shock-absorbing rubber; The wheel core is rotatably connected to the caster shaft through a bearing, the wheel core is a steel core or an aluminum core, the shock-absorbing rubber is wrapped around the outer periphery of the wheel core, and the shock-absorbing rubber is polyurethane rubber.

9. The load-bearing caster with height adjustment and shock absorption functions according to claim 8, characterized in that: Two to four bearings are provided.

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