Low-gravity-center high-load trundle with buffer structure

Abstract

The utility model discloses a low gravity center high load-carrying caster with a buffer structure, and relates to the technical field of casters, the low gravity center high load-carrying caster comprises a C-shaped frame, the top of the C-shaped frame is slidably connected with a C-shaped block, the side surfaces of two vertical blocks of the C-shaped block are both fixedly connected with moving strips, the left and right sides of two vertical plates of the C-shaped frame are both provided with moving grooves, and the moving strips are fixedly connected with the moving grooves. And the interiors of the moving grooves are slidably connected with the side faces of the moving strips, round rods are movably inserted into the side faces of two vertical plates of the C-shaped frame, and the side faces of the round rods are movably sleeved with moving wheels. Downward extrusion force is applied to the fixing plate through the moving wheel, the fixing plate drives the C-shaped block to move downwards and extrudes the first compression spring and the second compression spring at the same time, when the moving wheel moves to the pothole, the moving wheel and the C-shaped frame move downwards through the first compression spring and the second compression spring, the lower side of the moving wheel makes contact with the interior of the pothole, and therefore the pothole is fixed. Vibration generated when the moving wheel transports objects is buffered, and the possibility that the moving wheel is damaged is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of casters, in particular to a low-center-of-gravity and high-load-bearing caster with a buffer structure. Background Art

[0002] Low-center-of-gravity casters are specially designed caster accessories, which feature a lower position of the wheel than traditional casters, which lowers the center of gravity of the equipment or furniture. By placing the wheels at a lower position, low-center-of-gravity casters can provide better balance and stability, reducing the risk of tipping and shaking.

[0003] The existing patent (Announcement No.: CN209666739U) discloses a low-center-of-gravity, high-load, impact-resistant AGV caster, including a base plate and a pair of bracket legs with the same structure, a steering part is installed on the lower wall of the base plate, and the pair of bracket legs are respectively installed under the steering part. The inner sleeve is welded to the base plate and riveted through the outer sleeve by a new riveting method at the steering part. When the caster is subjected to a large impact force, the track can be kept from deforming. In the process of implementing this solution, it was found that the following problems exist in the prior art and have not been well solved: the above-mentioned device reduces the deformation of the track by riveting and welding, but the caster is a fixed structure as a whole, which leads to the caster vibrating and becoming loose due to the extrusion of the gravity of the objects on the caster and the potholes on the road after a long period of use, which makes the caster easy to be damaged. Utility Model Content

[0004] In order to improve the above-mentioned problem of reducing the deformation of the track by riveting and welding, but the caster as a whole is a fixed structure, which leads to the caster becoming loose after being used for a long time due to the squeezing of the gravity of the objects on the caster, and then the caster is easily damaged. The utility model provides a low-center-of-gravity and high-load-bearing caster with a buffer structure.

[0005] The utility model provides a low-center-of-gravity, high-load-bearing caster with a buffer structure, which adopts the following technical solutions:

[0006] A low-center-of-gravity, high-load caster with a buffer structure, comprising a C-shaped frame, a C-shaped block is slidably connected to the top of the C-shaped frame, a moving bar is fixedly connected to the sides of two vertical blocks of the C-shaped block, and moving grooves are provided on both sides of the two vertical plates of the C-shaped frame, and the inside of the moving groove is slidably connected to the side of the moving bar;

[0007] Round rods are movably inserted into the side surfaces of the two vertical plates of the C-shaped frame, moving wheels are movably sleeved into the side surfaces of the round rods, and a limiting piece is movably inserted into the front side of the C-shaped frame.

[0008] The above technical solution can facilitate buffering of vibrations caused by the moving wheels when transporting objects, reduce the possibility of damage to the moving wheels, and enable quick cleaning and replacement of the moving wheels.

[0009] Optionally, in the above-mentioned low-center-of-gravity and high-load caster with a buffer structure, the bottom of the cross plate of the C-shaped block is fixedly connected with a first compression spring, the bottom end of the first compression spring is fixedly connected to the top of the cross plate of the C-shaped frame, and the bottom of the movable bar is fixedly connected with two second compression springs, and the bottom end of the second compression spring is fixedly connected to the bottom of the inner wall of the movable groove.

[0010] Through the above technical solution, it is convenient to support through the first compression spring and the second compression spring, thereby reducing the possibility of the C-shaped frame being squeezed by the C-shaped block moving downward and causing damage to the C-shaped frame.

[0011] Optionally, in the above-mentioned low-center-of-gravity and high-load caster with a buffer structure, two limit bars are fixedly connected to the bottom of the cross block of the C-shaped block, and a rectangular groove matching the two limit bars is opened on the top of the cross plate of the C-shaped frame, and the side surface of the limit bar is slidably connected to the inside of the rectangular groove.

[0012] Through the above technical solution, it is convenient to set two limit bars so that when the C-shaped block moves downward, the two limit bars can be driven to move downward, thereby enabling the C-shaped block to move vertically downward.

[0013] Optionally, in the above-mentioned low-center-of-gravity and high-load caster with a buffer structure, the limiting component is a C-shaped rod, and the C-shaped rod is movably inserted in the front side of the C-shaped frame. The rear side of the cross bar of the C-shaped rod is fixedly connected to two tension springs, and one end of the tension spring is fixedly connected to the front side of the two vertical plates of the C-shaped frame. The front side of the round rod is provided with a slot that cooperates with the two vertical rods of the C-shaped rod.

[0014] Through the above technical solution, the two vertical rods of the C-shaped rod can be moved out from the inside of the two slots by stretching the C-shaped rod forward, thereby releasing the fixation of the round rod.

[0015] Optionally, in the above-mentioned low-center-of-gravity and high-load caster with a buffer structure, a connecting groove is provided on the top of the C-shaped frame, a connecting rod is rotatably connected to the inside of the connecting groove, a bearing is fixedly sleeved on the side of the connecting rod, and the outer ring of the bearing is fixedly connected to the inside of the connecting groove.

[0016] Through the above technical solution, the bearing can reduce the friction force generated when the connecting rod rotates inside the connecting groove.

[0017] Optionally, in the above-mentioned low-center-of-gravity and high-load-bearing caster with a buffer structure, the top end of the connecting rod is fixedly connected to a fixing plate, and six installation grooves are opened on the top of the fixing plate.

[0018] Through the above technical solution, the fixing plate and the mounting groove can be conveniently used to install the load-bearing caster using bolts and other parts.

[0019] Optionally, in the above-mentioned low-center-of-gravity and high-load-bearing caster with a buffer structure, a rubber ring is fixedly sleeved on the outer side of the moving wheel, and the side surface of the moving wheel is rounded, and the width of the moving wheel is equal to the distance between the two vertical plates of the C-shaped frame.

[0020] Through the above technical solution, the area of ​​the side surface of the moving wheel that is easy to be rounded and in contact with the ground is smaller, thereby reducing the friction generated by the moving wheel when moving.

[0021] In summary, the present invention has at least one of the following beneficial effects:

[0022] The moving wheel applies a downward squeezing force to the fixed plate, so that the fixed plate drives the C-shaped block to move downward, and at the same time squeezes the first compression spring and the second compression spring. When the moving wheel moves to the pothole, the moving wheel and the C-shaped frame move downward through the first compression spring and the second compression spring, so that the lower side of the moving wheel contacts the inside of the pothole, thereby buffering the vibration generated by the moving wheel when transporting objects and reducing the possibility of damage to the moving wheel.

[0023] By stretching the C-shaped rod forward, the two vertical rods of the C-shaped rod are moved out of the two slots, the fixation of the round rod is released, the moving wheel is moved out from the side of the round rod, and the round rod is slid out from the inside of the two vertical plates of the C-shaped frame, so that the moving wheel can be quickly cleaned and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 It is a partial three-dimensional structural cross-sectional view of the C-shaped frame of the utility model;

[0026] Figure 3 It is a partial three-dimensional structural schematic diagram of the limiting member of the utility model;

[0027] Figure 4 It is a partial three-dimensional structural cross-sectional view of the C-shaped block of the utility model.

[0028] In the figure: 1, C-shaped frame; 101, rectangular groove; 102, bearing; 103, connecting groove; 104, connecting rod; 105, fixing plate; 106, mounting groove; 2, C-shaped block; 201, first compression spring; 202, limiting strip; 3, moving strip; 301, second compression spring; 4, moving groove; 5, round rod; 6, moving wheel; 7, limiting piece; 701, C-shaped rod; 702, tension spring; 703, slot. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 The utility model is described in further detail.

[0030] Please refer to the attached figure in the instruction manual Figure 1 , Figure 2 and Figure 3 The utility model provides an embodiment: a low-center-of-gravity, high-load caster with a buffer structure, comprising a C-shaped frame 1, a C-shaped block 2 is slidably connected to the top of the C-shaped frame 1, and the sides of the two vertical blocks of the C-shaped block 2 are fixedly connected to a moving bar 3, and the left and right sides of the two vertical plates of the C-shaped frame 1 are both provided with a moving groove 4, and the inside of the moving groove 4 is slidably connected to the side of the moving bar 3;

[0031] Round rods 5 are movably inserted into the side surfaces of the two vertical plates of the C-shaped frame 1 , and moving wheels 6 are movably sleeved into the side surfaces of the round rods 5 . A limiting member 7 is movably inserted into the front side of the C-shaped frame 1 .

[0032] See the attached drawings in the specification Figure 1 , Figure 2 and Figure 3 The bottom of the horizontal plate of the C-shaped block 2 is fixedly connected with a first compression spring 201, and the bottom end of the first compression spring 201 is fixedly connected to the top of the horizontal plate of the C-shaped frame 1. The bottom of the movable bar 3 is fixedly connected with two second compression springs 301, and the bottom end of the second compression spring 301 is fixedly connected to the bottom of the inner wall of the movable groove 4. The first compression spring 201 and the second compression spring 301 are supported, which reduces the possibility of the C-shaped block 2 moving downward to squeeze the C-shaped frame 1 and damage the C-shaped frame 1.

[0033] See the attached drawings in the specification Figure 1 , Figure 2 and Figure 3 The bottom of the horizontal block of the C-shaped block 2 is fixedly connected with two limit bars 202, and the top of the horizontal plate of the C-shaped frame 1 is provided with a rectangular groove 101 that matches the two limit bars 202. The side of the limit bar 202 is slidably connected with the inside of the rectangular groove 101. By setting the two limit bars 202, the two limit bars 202 can be driven to move downward when the C-shaped block 2 moves downward, thereby enabling the C-shaped block 2 to move vertically downward.

[0034] See the attached drawings in the specification Figure 1 , Figure 2 and Figure 3, the limiting member 7C-shaped rod 701, the C-shaped rod 701 is movably inserted in the front side of the C-shaped frame 1, the rear side of the cross bar of the C-shaped rod 701 is fixedly connected with two tension springs 702, one end of the tension spring 702 is fixedly connected with the front side of the two vertical plates of the C-shaped frame 1, and the front side of the round rod 5 is provided with a slot 703 that matches the two vertical rods of the C-shaped rod 701. By stretching the C-shaped rod 701 forward, the two vertical rods of the C-shaped rod 701 can be moved out from the inside of the two slots 703, thereby releasing the fixation of the round rod 5.

[0035] See the attached drawings in the specification Figure 1 , Figure 2 and Figure 3 A connecting groove 103 is provided at the top of the C-shaped frame 1, and a connecting rod 104 is rotatably connected inside the connecting groove 103. A bearing 102 is fixedly sleeved on the side of the connecting rod 104. The outer ring of the bearing 102 is fixedly connected to the inside of the connecting groove 103. The bearing 102 reduces the friction force generated when the connecting rod 104 rotates inside the connecting groove 103.

[0036] See the attached drawings in the specification Figure 1 , Figure 2 and Figure 3 The top of the connecting rod 104 is fixedly connected with a fixing plate 105, and the top of the fixing plate 105 is provided with six mounting grooves 106. The fixing plate 105 and the mounting grooves 106 facilitate the installation of the load-bearing caster using bolts and other parts.

[0037] See the attached drawings in the specification Figure 1 , Figure 2 and Figure 3 A rubber ring is fixedly sleeved on the outer side of the moving wheel 6, and the side of the moving wheel 6 is rounded. The width of the moving wheel 6 is equal to the distance between the two vertical plates of the C-shaped frame 1. The area of ​​the side of the moving wheel 6 with rounded corners in contact with the ground is smaller, thereby reducing the friction generated by the moving wheel 6 when moving.

[0038] Working principle: When using the low-center-of-gravity and high-load caster with a buffer structure, when transporting objects, the gravity on the moving wheel 6 applies a downward squeezing force to the fixed plate 105, so that the fixed plate 105 drives the C-shaped block 2 to move downward, and at the same time compresses the first compression spring 201 and the second compression spring 301. When the moving wheel moves to the pothole and the lower side of the caster is in a suspended state, the moving wheel 6 and the C-shaped frame 1 move downward through the rebound force of the first compression spring 201 and the second compression spring 301, so that the lower side of the moving wheel 6 contacts the inside of the pothole, thereby buffering the vibration generated by the moving wheel 6 when transporting objects, reducing the possibility of damage to the moving wheel 6.

[0039] By stretching the C-shaped rod 701 forward, the two vertical rods of the C-shaped rod 701 are moved out from the inside of the two slots 703 respectively, thereby releasing the fixation of the round rod 5, and then the moving wheel 6 is moved out from the side of the round rod 5, and the round rod 5 is slid out from the inside of the two vertical plates of the C-shaped frame 1, so that the moving wheel 6 can be quickly cleaned and replaced.

[0040] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A low-center-of-gravity, high-load-bearing caster with a buffer structure, comprising a C-shaped frame (1), characterized in that: The top of the C-shaped frame (1) is slidably connected to a C-shaped block (2), the sides of the two vertical blocks of the C-shaped block (2) are fixedly connected to moving bars (3), and the left and right sides of the two vertical plates of the C-shaped frame (1) are provided with moving grooves (4), and the inside of the moving grooves (4) is slidably connected to the sides of the moving bars (3); Round rods (5) are movably inserted into the side surfaces of the two vertical plates of the C-shaped frame (1), moving wheels (6) are movably sleeved into the side surfaces of the round rods (5), and a limiting member (7) is movably inserted into the front side of the C-shaped frame (1).

2. The low-center-of-gravity, high-load-bearing caster with a buffer structure according to claim 1, characterized in that: A first compression spring (201) is fixedly connected to the bottom of the transverse plate of the C-shaped block (2), and the bottom end of the first compression spring (201) is fixedly connected to the top of the transverse plate of the C-shaped frame (1). Two second compression springs (301) are fixedly connected to the bottom of the movable bar (3), and the bottom end of the second compression spring (301) is fixedly connected to the bottom of the inner wall of the movable groove (4).

3. The low-center-of-gravity, high-load-bearing caster with a buffer structure according to claim 1, characterized in that: The bottom of the transverse block of the C-shaped block (2) is fixedly connected to two limit bars (202); the top of the transverse plate of the C-shaped frame (1) is provided with a rectangular groove (101) matching with the two limit bars (202); the side surface of the limit bar (202) is slidably connected to the inside of the rectangular groove (101).

4. The low-center-of-gravity, high-load-bearing caster with a buffer structure according to claim 1, characterized in that: The limiting member (7) comprises a C-shaped rod (701), the C-shaped rod (701) being movably plugged into the front side of the C-shaped frame (1), the rear side of the cross bar of the C-shaped rod (701) being fixedly connected to two tension springs (702), one end of the tension spring (702) being fixedly connected to the front side of two vertical plates of the C-shaped frame (1), and the front side of the round rod (5) being provided with a slot (703) matching with the two vertical bars of the C-shaped rod (701).

5. The low-center-of-gravity, high-load-bearing caster with a buffer structure according to claim 1, characterized in that: A connecting groove (103) is provided on the top of the C-shaped frame (1), a connecting rod (104) is rotatably connected inside the connecting groove (103), a bearing (102) is fixedly sleeved on the side of the connecting rod (104), and an outer ring of the bearing (102) is fixedly connected to the inside of the connecting groove (103).

6. The low-center-of-gravity, high-load-bearing caster with a buffer structure according to claim 5, characterized in that: The top end of the connecting rod (104) is fixedly connected to a fixing plate (105), and the top of the fixing plate (105) is provided with six mounting grooves (106).

7. The low-center-of-gravity, high-load-bearing caster with a buffer structure according to claim 1, characterized in that: A rubber ring is fixedly sleeved on the outer side of the moving wheel (6), and the side surface of the moving wheel (6) is rounded. The width of the moving wheel (6) is equal to the distance between the two vertical plates of the C-shaped frame (1).

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