Low-gravity-center universal trundle

Abstract

The utility model discloses a low gravity center universal caster which comprises a mounting plate, a swing plate, a rotating plate, a movable support and a wheel, the swing plate is arranged below the mounting plate, a swing rod is arranged between the mounting plate and the swing plate, a reset ring set is arranged between the mounting plate and the swing plate, the rotating plate is arranged below the swing plate, and the movable support is arranged below the rotating plate. A bearing set is arranged between the swing plate and the rotating plate, the movable support is fixed to the bottom of the rotating plate, a damping rod is arranged on the movable support, the wheels are installed at the tail end of the movable support, the swing plate can swing along the installation plate under the action of the swing rod, and therefore the trundle can be suitable for more complex terrains. The caster can easily pass through pits and ridges, after swinging in different directions, the caster is damped and reset under the action of spring force of the reset ring set, when the caster bears load, the movable support deforms and enables the gravity center of the caster to move downwards, and the heavier the load of the caster is, the lower the gravity center of the caster is.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for transport devices, in particular to a low-center-of-gravity universal caster. Background Art

[0002] With the rapid development of modern industry and logistics, casters are widely used, not only in factories, supermarkets, airports and warehouses, but also in homes. However, the working conditions of conventional universal casters are very good, and the ground is very flat. However, when the working conditions of some roads are not good, such as pits and bumps, according to the existing technology, ordinary wheels have poor flexibility and poor reliability.

[0003] For example, the Chinese patent: application number is 202221635647.8, and the patent name is a universal caster, "including: a connecting component, the connecting component includes a base plate, an integrated bearing cover, a large steel ball ring, a bearing cover I, a bearing cover II, a small steel ball ring, a bearing cover III, a wave plate and a rivet; the rivet includes an upper fixing part, an intermediate fixing part and a lower fixing part; a bracket, the bracket is movably connected to the connecting component; the wheel is sleeved on the bottom end of the inner wall of the bracket; a fixing component, the fixing component includes a threaded bolt and The screw of the bolt passes through the bracket and the wheel, and the nut is located on the outside of the bracket; wherein the intermediate fixing member passes through the bottom plate, the integrated bearing cover, the large steel ball ring, the bearing cover I, the bracket, the bearing cover II, the small steel ball ring, and the bearing cover III in sequence. The above-mentioned universal caster can pass through multiple sets of bearings. When realizing circular rotation, multiple sets of bearings can reduce most of the friction, but the universal caster can only rotate in a circle along the axis of the bottom plate, and the center of gravity of the caster is a fixed height, and the center of gravity height of the caster can not only be adjusted according to the load of the caster. Utility Model Content

[0004] The utility model aims to provide a universal caster with a low center of gravity.

[0005] In order to achieve the above purpose, the utility model adopts the following scheme:

[0006] A low-center-of-gravity universal caster comprises a mounting plate, a swing plate, a swivel plate, a movable bracket and a wheel. A swing plate is provided under the mounting plate, a swing rod is provided between the mounting plate and the swing plate, a reset ring group is provided between the mounting plate and the swing plate, a swivel plate is provided under the swing plate, and a bearing group is provided between the swing plate and the swivel plate. The movable bracket is fixed to the bottom of the swivel plate, a shock-absorbing rod is provided on the movable bracket, and the wheel is installed at the end of the movable bracket. The swing plate on the utility model can swing along the mounting plate under the action of the swing rod, so that the caster can be used for more complex terrain and can easily pass through pits and bumps. After the caster swings in different directions, it is shock-absorbed and reset under the action of the spring force of the reset ring group. When the caster is loaded, the movable bracket will deform and move the center of gravity of the caster downward. The heavier the load on the caster, the lower the center of gravity of the caster.

[0007] As a preferred solution of the utility model, the movable bracket includes a first connecting plate respectively installed at both ends of the wheel shaft, a second connecting plate is hinged at one end of the first connecting plate, and one end of the second connecting plate is fixed to the bottom of the rotating plate.

[0008] As a further solution of the utility model, the second connecting plate is L-shaped, the first connecting plate and the second connecting plate are hinged to each other to form a V-shaped frame, and the shock absorbing rod is installed at the inner angle of the V-shaped frame.

[0009] As a further solution of the utility model, the shock-absorbing rod includes a first hinged ear and a second hinged ear respectively hinged on the first connecting plate and the second connecting plate, a guide rod is fixed to one end of the first hinged ear, a guide cylinder mounted on the guide rod is fixed to one end of the second hinged ear, and a first spring is mounted on the guide cylinder.

[0010] As a further solution of the utility model, the bearing group includes a first mounting hole arranged at the axis center of the rotating plate, an outer ring is embedded in the first mounting hole, an inner ring is installed at the axis center of the outer ring, ball mounting grooves are respectively provided on the inner wall of the outer ring and the outer wall of the inner ring, a plurality of balls are arranged in sequence along the circumference in the ball mounting grooves, a second mounting hole is provided at the axis center of the inner ring, and a fixed shaft installed in the second mounting hole is fixed to the bottom of the rotating plate.

[0011] As a preferred solution of the utility model, the swing rod includes a first ball joint fixed to the bottom of the mounting plate, a cylindrical plate is fixed to the top of the swing plate, and a first spherical groove that can cooperate with the first ball joint is provided on the top of the cylindrical plate.

[0012] As a further solution of the utility model, the reset ring group includes an elastic ring arranged on a mounting plate and a swing plate, a plurality of through holes are sequentially arranged on the elastic ring along the circumference, and a reset rod group is arranged in the through holes between the mounting plate and the swing plate.

[0013] As a further solution of the utility model, annular plug plates are respectively provided at the upper and lower ends of the elastic ring, annular slots that can cooperate with the annular plug plates are respectively provided on the mounting plate and the swing plate, and a plurality of groove-shaped through holes are sequentially provided on the elastic ring along the circumference.

[0014] As a preferred solution of the utility model, the reset rod group includes a countersunk hole coaxial with the through hole and provided with a mounting plate and a swing plate in sequence along the circumference, a second spherical groove is provided in the countersunk hole, an elastic rod is provided in the through hole, second ball joints cooperating with the second spherical groove are fixed at both ends of the elastic rod, and a second spring is sleeved on the elastic rod.

[0015] To sum up, the utility model has the following beneficial effects compared with the prior art: the swing plate on the utility model can swing along the mounting plate under the action of the swing rod, so that the caster can be suitable for more complex terrains and can easily pass through pits and bumps. After the caster swings in different directions, it is shock-absorbed and reset under the action of the spring force of the reset ring group. When the caster is loaded, the movable bracket will deform and move the center of gravity of the caster downward. The heavier the load on the caster, the lower the center of gravity of the caster. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional view of the utility model.

[0017] Figure 2 This is an exploded view of the utility model.

[0018] Figure 3 It is a cross-sectional view of the utility model.

[0019] Figure 4 For this utility model Figure 2 Magnified view at A in the middle.

[0020] Explanation of the accompanying drawings: 1. mounting plate; 2. swing plate; 3. rotating plate; 4. movable bracket; 5. wheel; 20. swing rod; 40. reset ring group; 60. bearing group; 80. shock-absorbing rod; 11. first connecting plate; 12. second connecting plate; 81. first hinge ear; 82. second hinge ear; 83. guide rod; 84. guide cylinder; 85. first spring; 61. first mounting hole; 62. outer ring; 63. inner ring; 64. ball mounting groove; 65. ball; 66. second mounting hole; 67. fixed shaft; 21. first ball joint; 22. cylindrical plate; 23. first spherical groove; 41. elastic ring; 42. through hole; 50. reset rod group; 43. annular plug plate; 44. annular slot; 45. groove-type through hole; 51. countersunk hole; 52. second spherical groove; 53. elastic rod; 54. second ball joint; 55. second spring. DETAILED DESCRIPTION

[0021] The following specific implementation content provides a variety of different embodiments or examples for implementing the utility model. Of course, these are only embodiments or examples and are not intended to be limiting. In addition, repeated reference numerals may be used in different embodiments, such as repeated numbers and / or letters. These repetitions are for the purpose of simply and clearly describing the utility model and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0022] In addition, space-related words may be used, such as "below", "lower side", "from the inside out", "above", "upper side" and similar words. These relative words are for the convenience of describing the relationship between one element or feature and another element or feature in the drawings. These spatial relative words include different orientations of the device in use or operation, as well as the orientations described in the drawings. The device may be turned to different orientations, rotations or other orientations, and the space-related adjectives used therein may also be interpreted in the same way. Therefore, it cannot be understood as a limitation on the utility model. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods: Figures 1 to 4 A low-center-of-gravity universal caster shown in the figure comprises a mounting plate 1, a swing plate 2, a rotating plate 3, a movable bracket 4 and a wheel 5, a swing plate 2 is provided below the mounting plate 1, a swing rod 20 is provided between the mounting plate 1 and the swing plate 2, a reset ring group 40 is provided between the mounting plate 1 and the swing plate 2, a rotating plate 3 is provided below the swing plate 2, a bearing group 60 is provided between the swing plate 2 and the rotating plate 3, the movable bracket 4 is fixed to the bottom of the rotating plate 3, a shock-absorbing rod 80 is provided on the movable bracket 4, and the wheel 5 is installed at the end of the movable bracket 4.

[0024] A further embodiment of the movable bracket 4 in the utility model: the movable bracket 4 includes a first connecting plate 11 respectively installed at both ends of the rotating shaft of the wheel 5, a second connecting plate 12 is hinged at one end of the first connecting plate 11, and one end of the second connecting plate 12 is fixed to the bottom of the rotating plate 3. The movable bracket 4 can be deformed. When the caster is loaded, the angle between the first connecting plate 11 and the second connecting plate 12 will change. The greater the load of the caster, the smaller the angle between the first connecting plate 11 and the second connecting plate 12, so that the center of gravity of the caster is lower.

[0025] A further embodiment of the second connecting plate 12 in the present invention: the second connecting plate 12 is L-shaped, the first connecting plate 11 and the second connecting plate 12 are hinged to each other to form a V-shaped frame, and the shock-absorbing rod 80 is installed at the inner angle of the V-shaped frame. When the angle between the first connecting plate 11 and the second connecting plate 12 becomes smaller, the center of gravity of the caster becomes lower, so that the caster is more stable when moving.

[0026] A further embodiment of the shock-absorbing rod 80 in the utility model: the shock-absorbing rod 80 includes a first hinged ear 81 and a second hinged ear 82 respectively hinged on the first connecting plate 11 and the second connecting plate 12, a guide rod 83 is fixed to one end of the first hinged ear 81, a guide cylinder 84 sleeved on the guide rod 83 is fixed to one end of the second hinged ear 82, a first spring 85 is sleeved on the guide cylinder 84, the shock-absorbing rod 80 has the effect of absorbing vibration force, and at the same time supports the angle of the movable bracket 4.

[0027] A further embodiment of the bearing group 60 in the present invention: the bearing group 60 includes a first mounting hole 61 arranged at the axis center of the rotating plate 3, an outer ring 62 is embedded in the first mounting hole 61, an inner ring 63 is installed at the axis center of the outer ring 62, ball mounting grooves 64 are respectively provided on the inner wall of the outer ring 62 and the outer wall of the inner ring 63, a plurality of balls 65 are sequentially arranged along the circumference in the ball mounting groove 64, a second mounting hole 66 is provided at the axis center of the inner ring 63, and a fixed shaft 67 installed in the second mounting hole 66 is fixed at the bottom of the rotating plate 3. The bearing group can reduce the friction during rotation when the caster rotates, so that the caster can rotate more smoothly.

[0028] A further embodiment of the swing rod 20 in the utility model: the swing rod 20 includes a first ball joint 21 fixed to the bottom of the mounting plate 1, a cylindrical plate 22 is fixed to the top of the swing plate 2, and a first spherical groove 23 that can cooperate with the first ball joint 21 is provided on the top of the cylindrical plate 22. After the first ball joint 21 cooperates with the first spherical groove 23, the swing plate 2 can move in different directions along the axis of the first ball joint 21, so that the caster can be applied to more terrains.

[0029] A further embodiment of the reset ring group 40 in the utility model: the reset ring group 40 includes an elastic ring 41 arranged on the mounting plate 1 and the swing plate 2, a plurality of through holes 42 are sequentially arranged on the elastic ring 41 along the circumference, a reset rod group 50 is arranged in the through holes 42 between the mounting plate 1 and the swing plate 2, and the elastic ring 41 can reset the swing plate 2 under the action of the spring force after the swing plate 2 swings along the mounting plate 1.

[0030] A further embodiment of the elastic ring 41 in the utility model: annular plug plates 43 are respectively provided at the upper and lower ends of the elastic ring 41, annular slots 44 that can cooperate with the annular plug plates 43 are respectively provided on the mounting plate 1 and the swing plate 2, and a plurality of groove-shaped through holes 45 are sequentially provided on the elastic ring 41 along the circumference. The groove-shaped through holes 45 allow the elastic ring 41 to have more deformation space, so that the swinging amplitude of the swinging plate 2 along the mounting plate 1 is larger, so that more terrains can be used.

[0031] A further embodiment of the reset rod group 50 in the utility model: the reset rod group 50 includes countersunk holes 51 which are respectively provided on the mounting plate 1 and the swing plate 2 along the circumference and are coaxial with the through hole 42, a second spherical groove 52 is provided in the countersunk hole 51, an elastic rod 53 is provided in the through hole 42, second ball joints 54 matching the second spherical groove 52 are respectively fixed at both ends of the elastic rod 53, a second spring 55 is sleeved on the elastic rod 53, the elastic rod 53 is elastic, and the function of the elastic rod 53 and the second spring 55 is to further provide more spring force when the swing plate 2 is reset, so that the caster can bear more load, and when the caster is loaded with a larger load, the elastic ring 41, the elastic rod 53 and the second spring 55 can also reset the swing plate 2.

[0032] When in use: the movable bracket 4 can be deformed. When the caster is loaded, the angle between the first connecting plate 11 and the second connecting plate 12 will change. The greater the load on the caster, the smaller the angle between the first connecting plate 11 and the second connecting plate 12, so that the center of gravity of the caster is lower. When the angle between the first connecting plate 11 and the second connecting plate 12 becomes smaller, the center of gravity of the caster becomes lower, so that the caster is more stable when moving. The shock-absorbing rod 80 absorbs the shock force and supports the angle of the movable bracket 4 at the same time. The bearing group can reduce the friction during rotation when the caster rotates, so that the caster rotates more smoothly. After the first ball joint 21 cooperates with the first spherical groove 23, the swing plate 2 can move along the first The axis of the ball joint 21 moves in different directions, so that the caster can be used in more terrains. After the swing plate 2 swings along the mounting plate 1, the elastic ring 41 can reset the swing plate 2 under the action of the spring force. The grooved through hole 45 allows the elastic ring 41 to have more deformation space, so that the swing plate 2 has a larger swing amplitude along the mounting plate 1, and can be used in more terrains. The elastic rod 53 is elastic. The function of the elastic rod 53 and the second spring 55 is to further provide more spring force when resetting the swing plate 2, so that the caster can bear more load. When the caster is loaded with a heavier load, the elastic ring 41, the elastic rod 53 and the second spring 55 can also reset the swing plate 2.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A low-center-of-gravity universal caster, comprising a mounting plate (1), a swing plate (2), a rotating plate (3), a movable bracket (4) and a wheel (5), characterized in that: A swing plate (2) is provided below the mounting plate (1), a swing rod (20) is provided between the mounting plate (1) and the swing plate (2), a reset ring group (40) is provided between the mounting plate (1) and the swing plate (2), a rotating plate (3) is provided below the swing plate (2), a bearing group (60) is provided between the swing plate (2) and the rotating plate (3), the movable bracket (4) is fixed to the bottom of the rotating plate (3), a shock absorbing rod (80) is provided on the movable bracket (4), and the wheel (5) is installed at the end of the movable bracket (4).

2. The low-center-of-gravity universal caster according to claim 1, characterized in that: The movable bracket (4) comprises a first connecting plate (11) respectively mounted on both ends of the rotating shaft of the wheel (5); a second connecting plate (12) is hingedly connected to one end of the first connecting plate (11); and one end of the second connecting plate (12) is fixed to the bottom of the rotating plate (3).

3. The low-center-of-gravity universal caster according to claim 2, characterized in that: The second connecting plate (12) is L-shaped, the first connecting plate (11) and the second connecting plate (12) are hinged to each other to form a V-shaped frame, and the shock absorbing rod (80) is installed at the inner angle of the V-shaped frame.

4. The low-center-of-gravity universal caster according to claim 2, characterized in that: The damping rod (80) comprises a first hinged ear (81) and a second hinged ear (82) respectively hinged on the first connecting plate (11) and the second connecting plate (12); a guide rod (83) is fixed to one end of the first hinged ear (81); a guide cylinder (84) sleeved on the guide rod (83) is fixed to one end of the second hinged ear (82); and a first spring (85) is sleeved on the guide cylinder (84).

5. The low-center-of-gravity universal caster according to claim 1, characterized in that: The bearing group (60) comprises a first mounting hole (61) arranged at the axis of the rotating plate (3), an outer ring (62) is embedded in the first mounting hole (61), an inner ring (63) is installed at the axis of the outer ring (62), a ball mounting groove (64) is respectively provided on the inner wall of the outer ring (62) and the outer wall of the inner ring (63), a plurality of balls (65) are sequentially arranged along the circumference in the ball mounting groove (64), a second mounting hole (66) is provided at the axis of the inner ring (63), and a fixed shaft (67) installed in the second mounting hole (66) is fixed at the bottom of the rotating plate (3).

6. The low-center-of-gravity universal caster according to claim 1, characterized in that: The swing rod (20) comprises a first ball joint (21) fixed to the bottom of the mounting plate (1), a cylindrical plate (22) fixed to the top of the swing plate (2), and a first spherical groove (23) capable of cooperating with the first ball joint (21) is provided on the top of the cylindrical plate (22).

7. The low-center-of-gravity universal caster according to claim 1, characterized in that: The reset ring assembly (40) comprises an elastic ring (41) arranged on a mounting plate (1) and a swing plate (2), a plurality of through holes (42) are sequentially arranged on the elastic ring (41) along the circumference, and a reset rod assembly (50) is arranged in the through holes (42) between the mounting plate (1) and the swing plate (2).

8. The low-center-of-gravity universal caster according to claim 7, characterized in that: Annular plug plates (43) are respectively provided at the upper and lower ends of the elastic circular ring (41), annular slots (44) which can cooperate with the annular plug plates (43) are respectively provided on the mounting plate (1) and the swing plate (2), and a plurality of slot-shaped through holes (45) are sequentially provided on the elastic circular ring (41) along the circumference.

9. The low-center-of-gravity universal caster according to claim 7, characterized in that: The reset rod group (50) comprises countersunk holes (51) which are respectively arranged on the mounting plate (1) and the swing plate (2) along the circumference and are coaxial with the through hole (42); a second spherical groove (52) is arranged in the countersunk hole (51); an elastic rod (53) is arranged in the through hole (42); second ball joints (54) which cooperate with the second spherical groove (52) are respectively fixed at both ends of the elastic rod (53); and a second spring (55) is sleeved on the elastic rod (53).

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