Trundle with heightening support

Abstract

The utility model discloses a trundle with a heightening support, which comprises a wheel and a bearing installed on the axis of the wheel, an adjustable trundle frame is installed on the bearing, a first ball disc is fixed on the top of the adjustable trundle frame, a second ball group is placed in a second ball placing groove, and a second ball group is placed in the second ball placing groove. The first ball disc, the second ball disc and the mounting plate are arranged on the top of the mounting plate, bolt mounting holes are respectively formed in the axes of the first ball disc, the second ball disc and the mounting plate, and bolt groups for connecting the first ball disc, the second ball disc and the mounting plate are arranged in the bolt mounting holes. In this way, after the trundle and the vehicle body are installed and connected, the gravity center of the trundle cannot be too high, side turning caused by the too high gravity center when the vehicle body moves is reduced, ball sets are further arranged among the first ball disc, the second ball disc and the installation plate, friction force can be reduced when the trundle rotates, and the trundle rotates more smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for transport devices, in particular to a caster with a height-increasing bracket. Background Art

[0002] Casters are a general term, including movable casters and fixed casters. Movable casters are also called universal wheels, and their structure allows for rotation; fixed casters are also called fixed casters, which have no rotating structure and cannot turn. Commonly used casters generally fix the wheels to the bracket through the axle. Such caster brackets have complex structures and many parts, which greatly hinders mold design and caster assembly.

[0003] For example, Chinese patent: application number 2020107708384, the patent name is a height-adjustable balancing caster, "including a wheel body, a caster frame, a bearing and a mounting plate, the wheel body is rotatably connected to the caster frame, the bearing is installed on the top of the caster frame, and the bearing is installed on the mounting plate; the mounting plate is connected to the height adjustment tube, the height adjustment tube is provided with a plurality of first through holes, and the plurality of first through holes are distributed along the length direction of the height adjustment tube, the height adjustment tube is sleeved on the telescopic rod, the telescopic rod is provided with a second through hole, and the bolt passes through the first through hole and the second through hole to fix the telescopic rod to the height adjustment tube; the outer circumferential surface of the wheel body is sleeved with a wheel sleeve, the outer circumferential surface of the wheel body is provided with a plurality of inwardly concave grooves, and the plurality of grooves are evenly distributed along the circumference of the wheel body, and the wheel sleeve is provided with the The groove is matched with a convex strip, and the convex strip is snapped into the groove to fix the wheel sleeve to the wheel body; the wheel sleeve is provided with a plurality of buffer cavities, and the plurality of buffer cavities are evenly distributed along the circumference of the wheel sleeve; the center of the wheel body is provided with an axial hole, and the outer periphery of the axial hole is provided with a plurality of evenly distributed weight-reducing holes, and protective covers are respectively provided on both sides of the wheel body, and the protective covers are provided with buckles, and the wheel body is provided with buckle grooves corresponding to the buckles. The above-mentioned caster height adjustment method is to use a height adjustment tube and a telescopic rod to adjust the height of the caster, and use bolts to fix the current position of the telescopic rod, but the height adjustment tube and the telescopic rod are arranged on the top of the mounting plate, so that when the caster is installed with the vehicle body, the height of the caster is equal to the sum of the caster itself height plus the height adjustment tube and the telescopic rod, so that the center of gravity of the caster will be too high, and the center of gravity will be unstable when the vehicle body moves, which is easy to overturn. Utility Model Content

[0004] The purpose of the utility model is to provide a caster with a height-increasing bracket.

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

[0006] A caster with a height-increasing bracket comprises a wheel and a bearing mounted on the wheel axis, an adjustable caster frame is mounted on the bearing, a first ball plate is fixed on the top of the adjustable caster frame, a second ball plate and a mounting plate are sequentially arranged above the first ball plate, a first ball placement groove is arranged between the first ball plate and the second ball plate, a first ball group is placed in the first ball placement groove, a second ball placement groove is arranged between the second ball plate and the mounting plate, a second ball group is placed in the second ball placement groove, and a first ball plate, a second ball plate and a second ball plate are arranged between the first ball plate and the second ball plate. Bolt mounting holes are respectively provided on the axes of the ball bearing plate and the mounting plate, and bolt groups connecting the first ball bearing plate, the second ball bearing plate and the mounting plate are provided in the bolt mounting holes. The utility model can change the height-adjusting structure from the top of the mounting plate to the height-adjustable caster frame, so that when the caster is installed and connected to the vehicle body, the center of gravity of the caster will not be too high, thereby reducing the rollover of the vehicle body due to excessive center of gravity when moving. The utility model can also reduce the friction when the caster rotates by providing a ball group between the first ball bearing plate, the second ball bearing plate and the mounting plate, thereby making the caster rotate more smoothly.

[0007] As a further solution of the utility model, the adjustable caster frame includes a first support plate installed at both ends of the bearing, a second support plate is symmetrically arranged at the bottom of the first ball plate, a guide groove is arranged on the side of the first support plate close to the second support plate, a guide rod that can be inserted into the guide groove is arranged on the second support plate, and an adjustment group is arranged between the first support plate and the second support plate.

[0008] As a further solution of the utility model, the adjustment group includes first threaded holes arranged on the first support plate from top to bottom, a socket coaxial with the first threaded hole is provided on the second support plate, and a first bolt that can be inserted into the socket is threadedly connected to the first threaded hole.

[0009] As a preferred solution of the utility model, the first ball plate includes a first circular plate fixed on the top of the adjustable caster frame, a first conical plate is provided on the top of the first circular plate, an annular inclined surface is provided at the outer edge of the top of the first circular plate, and the bolt mounting hole is arranged on the axis of the first conical plate.

[0010] As a further solution of the utility model, the second ball plate includes a second circular plate arranged above the first circular plate, a first conical groove that can cooperate with the annular inclined surface is provided at the bottom of the second circular plate, a second conical plate is provided at the top of the second circular plate, and the bolt mounting hole is provided on the second conical plate.

[0011] As a preferred solution of the utility model, the first ball placement groove includes a first ball groove arranged around the outer edge of the first conical plate, a second ball groove is arranged around the first conical groove, and the first ball group is arranged between the first ball groove and the second ball groove.

[0012] As a further solution of the utility model, the second ball placement groove includes a third ball groove arranged around the outer edge of the second conical plate, a second conical groove cooperating with the second conical plate is provided at the bottom of the mounting plate, a fourth ball groove is provided at the outer edge of the second conical groove, and the second ball group is arranged between the third ball groove and the fourth ball groove.

[0013] As a preferred solution of the utility model, the bolt group includes countersunk holes respectively arranged on the top of the mounting plate and the bottom of the second ball plate, a second bolt is provided above the mounting plate, the second bolt passes through the bolt mounting holes on the first ball plate, the second ball plate and the mounting plate in sequence, and a nut threadedly connected to the second bolt is provided at the bottom of the first ball plate.

[0014] As a preferred solution of the utility model, the bearing includes a through hole arranged on the axis of the wheel, a rotating shaft is arranged on the axis of the through hole, bearing inner rings are rotatably arranged at both ends of the rotating shaft, a wheel cover is sleeved on the bearing inner ring, a fifth ball groove and a sixth ball groove are respectively arranged between the bearing inner ring and the wheel cover, a third ball group is arranged between the fifth ball groove and the sixth ball groove, the wheel covers are respectively installed at both ends of the through hole, second threaded holes are respectively arranged at both ends of the rotating shaft, steps are arranged on the outer walls at both ends of the rotating shaft, the first support plate is rotatably arranged on the steps, and a third bolt for fixing the first support plate is threadedly connected to the second threaded hole.

[0015] In summary, the utility model has the following beneficial effects compared with the prior art: the utility model can change the height adjustment structure from the top of the mounting plate to the caster frame with adjustable height, so that when the caster is installed and connected to the vehicle body, the center of gravity of the caster will not be too high, reducing the rollover due to the excessive center of gravity when the vehicle moves. The utility model can also provide a ball group between the first ball plate, the second ball plate and the mounting plate, so that the friction can be reduced when the caster rotates, making the caster rotate more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 This is one of the exploded views of the utility model.

[0018] Figure 3 This is the second exploded view of the utility model.

[0019] Figure 4 It is a cross-sectional view of the utility model.

[0020] Figure 5 For this utility model Figure 2 Magnified view at A in the middle.

[0021] Figure 6 For this utility model Figure 3 Magnified view at B.

[0022] Explanation of the reference numerals: 1. wheel; 20. bearing; 40. adjustable caster frame; 60. first ball plate; 70. second ball plate; 2. mounting plate; 80. first ball placement groove; 3. first ball group; 90. second ball placement groove; 4. second ball group; 5. bolt mounting hole; 100. bolt group; 41. first support plate; 42. second support plate; 43. guide groove; 44. guide rod; 50. adjustment group; 51. first threaded hole; 52. socket; 53. first bolt; 61. first round plate; 62. first Conical plate; 63, annular inclined surface; 71, second circular plate; 72, first conical groove; 73, second conical plate; 81, first ball groove; 82, second ball groove; 91, third ball groove; 92, second conical groove; 93, fourth ball groove; 101, countersunk hole; 102, second bolt; 103, nut; 21, through hole; 22, rotating shaft; 23, bearing inner ring: 24, wheel cover; 25, fifth ball groove; 26, sixth ball groove; 27, third ball group; 29, second threaded hole; 30, step; 31, third bolt. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods: Figures 1 to 6 A caster with a height-increasing bracket shown in the figure includes a wheel 1 and a bearing 20 installed on the axis of the wheel 1, an adjustable caster frame 40 is installed on the bearing 20, a first ball plate 60 is fixed on the top of the adjustable caster frame 40, a second ball plate 70 and a mounting plate 2 are arranged in sequence above the first ball plate 60, a first ball placement groove 80 is provided between the first ball plate 60 and the second ball plate 70, a first ball group 3 is placed in the first ball placement groove 80, a second ball placement groove 90 is provided between the second ball plate 70 and the mounting plate 2, a second ball group 4 is placed in the second ball placement groove 90, bolt mounting holes 5 are respectively provided on the axis of the first ball plate 60, the second ball plate 70 and the mounting plate 2, and a bolt group 100 connecting the first ball plate 60, the second ball plate 70 and the mounting plate 2 is provided in the bolt mounting hole 5.

[0026] A further embodiment of the adjustable caster frame 40 in the utility model: the adjustable caster frame 40 includes a first support plate 41 installed at both ends of the bearing 20, a second support plate 42 is symmetrically provided at the bottom of the first ball plate 60, a guide groove 43 is provided on the side of the first support plate 41 close to the second support plate 42, a guide rod 44 that can be inserted into the guide groove 43 is provided on the second support plate 42, an adjustment group 50 is provided between the first support plate 41 and the second support plate 42, and when the caster adjusts its height, the first support plate 41 can be pulled to move along the guide rod 44, and the height of the caster can be adjusted by adjusting the distance between the first support plate 41 and the second support plate 42.

[0027] A further embodiment of the adjustment group 50 in the utility model: the adjustment group 50 includes first threaded holes 51 arranged on the first support plate 41 from top to bottom, and a socket 52 coaxial with the first threaded hole 51 is provided on the second support plate 42, and a first bolt 53 that can be inserted into the socket 52 is threadedly connected to the first threaded hole 51. After adjusting the distance between the first support plate 41 and the second support plate 42, when adjusting the height of the caster, it is necessary to ensure that one pair of the first threaded holes 51 and the socket 52 are on the same axis, and then threadedly connected with the first bolt 53, and the first bolt 53 is inserted into the socket 52, so that the current height of the caster can be adjusted.

[0028] A further embodiment of the first ball plate 60 in the utility model: the first ball plate 60 includes a first circular plate 61 fixed to the top of the adjustable caster frame 40, a first conical plate 62 is provided on the top of the first circular plate 61, an annular inclined surface 63 is provided at the outer edge of the top of the first circular plate 61, and the bolt mounting hole 5 is arranged on the axis center of the first conical plate 62.

[0029] A further embodiment of the second ball plate 70 in the present invention: the second ball plate 70 includes a second circular plate 71 arranged above the first circular plate 61, a first conical groove 72 which can cooperate with the annular inclined surface 63 is provided at the bottom of the second circular plate 71, a second conical plate 73 is provided at the top of the second circular plate 71, the bolt mounting hole 5 is provided on the second conical plate 73, the annular inclined surface 63 cooperates with the first conical groove 72 to achieve the effect of convenient installation and also play a role of positioning.

[0030] A further embodiment of the first ball placement groove 80 in the utility model: the first ball placement groove 80 includes a first ball groove 81 arranged around the outer edge of the first conical plate 62, and a second ball groove 82 is arranged around the first conical groove 72. The first ball group 3 is arranged between the first ball groove 81 and the second ball groove 82. The first ball groove 81 is arranged at the outer edge of the first conical plate 62 to facilitate the installation of the balls. When installing the balls, it is only necessary to place the balls in the first ball groove 81. Under the action of the first conical groove 72, the balls will remain in the first ball groove 81, and the first ball groove 81 and the second ball groove 82 can cooperate to fix the first ball group 3.

[0031] A further embodiment of the second ball placement groove 90 in the utility model: the second ball placement groove 90 includes a third ball groove 91 arranged around the outer edge of the second conical plate 73, a second conical groove 92 cooperating with the second conical plate 73 is provided at the bottom of the mounting plate 2, a fourth ball groove 93 is provided at the outer edge of the second conical groove 92, the second ball group 4 is arranged between the third ball groove 91 and the fourth ball groove 93, and the second ball group 4 can be fixed after the third ball groove 91 and the fourth ball groove 93 cooperate.

[0032] A further embodiment of the bolt group 100 in the utility model: the bolt group 100 includes countersunk holes 101 respectively arranged on the top of the mounting plate 2 and the bottom of the second ball plate 70, a second bolt 102 is provided above the mounting plate 2, the second bolt 102 passes through the first ball plate 60, the second ball plate 70 and the bolt mounting hole 5 on the mounting plate 2 in sequence, and a nut 103 threadedly connected to the second bolt 102 is provided at the bottom of the first ball plate 60. When the second bolt 102 passes through the first ball plate 60, the second ball plate 70 and the bolt mounting hole 5 on the mounting plate 2 in sequence, it is connected with the nut 103 to fix the first ball plate 60, the second ball plate 70 and the mounting plate 2 together.

[0033] A further embodiment of the bearing 20 in the utility model: the bearing 20 includes a through hole 21 arranged on the axis of the wheel 1, a rotating shaft 22 is arranged on the axis of the through hole 21, bearing inner rings 23 are rotatably arranged at both ends of the rotating shaft 22, a wheel cover 24 is sleeved on the bearing inner ring 23, a fifth ball groove 25 and a sixth ball groove 26 are respectively arranged between the bearing inner ring 23 and the wheel cover 24, a third ball group 27 is arranged between the fifth ball groove 25 and the sixth ball groove 26, the wheel cover 24 is respectively installed at both ends of the through hole 21, second threaded holes 29 are respectively arranged at both ends of the rotating shaft 22, steps 30 are arranged on the outer walls at both ends of the rotating shaft 22, the first support plate 41 is rotatably arranged on the step 30, and the third bolt 31 for fixing the first support plate 41 is threadedly connected to the second threaded hole 29. The function of the bearing 20 is to reduce the friction generated by the rotation of the wheel so that the wheel rotates more smoothly.

[0034] When in use: when adjusting the height of the caster, the first support plate 41 can be pulled to move along the guide rod 44, and the height of the caster can be adjusted by adjusting the distance between the first support plate 41 and the second support plate 42. After adjusting the distance between the first support plate 41 and the second support plate 42, when adjusting the height of the caster, it is necessary to ensure that one pair of first threaded holes 51 and the insertion hole 52 are on the same axis, and then threadedly connected with the first bolt 53, and the first bolt 53 is inserted into the insertion hole 52, so that the current height of the caster can be adjusted. The annular inclined surface 63 cooperates with the first conical groove 72 to facilitate installation and also play a positioning role. The first ball groove 81 is arranged on the first conical plate The outer edge of 62 can facilitate the installation of the ball. When installing the ball, you only need to place the ball in the first ball groove 81. Under the action of the first conical groove 72, the ball will remain in the first ball groove 81. The first ball groove 81 and the second ball groove 82 can cooperate to fix the first ball group 3. When the second bolt 102 passes through the first ball plate 60, the second ball plate 70 and the bolt mounting hole 5 on the mounting plate 2 in turn, and then connects with the nut 103, the first ball plate 60, the second ball plate 70 and the mounting plate 2 can be fixed together. The function of the bearing 20 is to reduce the friction generated by the rotation of the wheel, so that the wheel rotates more smoothly.

[0035] 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 caster with a height-enhancing bracket, comprising a wheel (1) and a bearing (20) mounted on the axis of the wheel (1), characterized in that: An adjustable caster frame (40) is mounted on the bearing (20), a first ball plate (60) is fixed on the top of the adjustable caster frame (40), a second ball plate (70) and a mounting plate (2) are arranged in sequence above the first ball plate (60), a first ball placement groove (80) is arranged between the first ball plate (60) and the second ball plate (70), a first ball group (3) is placed in the first ball placement groove (80), a second ball placement groove (90) is arranged between the second ball plate (70) and the mounting plate (2), a second ball group (4) is placed in the second ball placement groove (90), bolt mounting holes (5) are respectively arranged on the axes of the first ball plate (60), the second ball plate (70) and the mounting plate (2), and a bolt group (100) for connecting the first ball plate (60), the second ball plate (70) and the mounting plate (2) is arranged in the bolt mounting hole (5).

2. The caster with height-enhancing bracket according to claim 1, characterized in that: The adjustable caster frame (40) comprises a first support plate (41) mounted on both ends of a bearing (20), a second support plate (42) symmetrically arranged at the bottom of the first ball plate (60), a guide groove (43) arranged on the side of the first support plate (41) close to the second support plate (42), a guide rod (44) capable of being inserted into the guide groove (43) arranged on the second support plate (42), and an adjustment group (50) arranged between the first support plate (41) and the second support plate (42).

3. The caster with height-enhancing bracket according to claim 2, characterized in that: The adjustment group (50) comprises first threaded holes (51) arranged sequentially from top to bottom on the first support plate (41), a plug hole (52) coaxial with the first threaded hole (51) is provided on the second support plate (42), and a first bolt (53) capable of being inserted into the plug hole (52) is threadedly connected to the first threaded hole (51).

4. The caster with height-enhancing bracket according to claim 1, characterized in that: The first ball plate (60) includes a first circular plate (61) fixed on the top of the adjustable caster frame (40), a first conical plate (62) is provided on the top of the first circular plate (61), an annular inclined surface (63) is provided at the outer edge of the top of the first circular plate (61), and the bolt mounting hole (5) is arranged on the axis of the first conical plate (62).

5. The caster with height-enhancing bracket according to claim 4, characterized in that: The second ball plate (70) includes a second circular plate (71) arranged above the first circular plate (61), a first conical groove (72) capable of cooperating with the annular inclined surface (63) is provided at the bottom of the second circular plate (71), a second conical plate (73) is provided at the top of the second circular plate (71), and the bolt mounting hole (5) is provided on the second conical plate (73).

6. The caster with height-enhancing bracket according to claim 5, characterized in that: The first ball placement groove (80) comprises a first ball groove (81) arranged around the outer edge of the first conical plate (62), a second ball groove (82) arranged around the first conical groove (72), and the first ball group (3) is arranged between the first ball groove (81) and the second ball groove (82).

7. The caster with height-enhancing bracket according to claim 6, characterized in that: The second ball placement groove (90) includes a third ball groove (91) arranged around the outer edge of the second conical plate (73), a second conical groove (92) cooperating with the second conical plate (73) is provided at the bottom of the mounting plate (2), a fourth ball groove (93) is provided at the outer edge of the second conical groove (92), and the second ball group (4) is arranged between the third ball groove (91) and the fourth ball groove (93).

8. The caster with height-enhancing bracket according to claim 1, characterized in that: The bolt group (100) comprises countersunk holes (101) respectively arranged on the top of the mounting plate (2) and the bottom of the second ball bearing plate (70); a second bolt (102) is arranged above the mounting plate (2); the second bolt (102) passes through the bolt mounting holes (5) on the first ball bearing plate (60), the second ball bearing plate (70) and the mounting plate (2) in sequence; a nut (103) threadedly connected to the second bolt (102) is arranged at the bottom of the first ball bearing plate (60).

9. The caster with height-enhancing bracket according to claim 2, characterized in that: The bearing (20) comprises a through hole (21) arranged on the axis of the wheel (1), a rotating shaft (22) is arranged on the axis of the through hole (21), bearing inner rings (23) are rotatably arranged at both ends of the rotating shaft (22), a wheel cover (24) is sleeved on the bearing inner ring (23), a fifth ball groove (25) and a sixth ball groove (26) are respectively arranged between the bearing inner ring (23) and the wheel cover (24), a third ball group (27) is arranged between the fifth ball groove (25) and the sixth ball groove (26), the wheel cover (24) is respectively mounted on both ends of the through hole (21), a second threaded hole (29) is respectively arranged at both ends of the rotating shaft (22), steps (30) are arranged on the outer walls of both ends of the rotating shaft (22), the first support plate (41) is rotatably arranged on the steps (30), and a third bolt (31) for fixing the first support plate (41) is threadedly connected to the second threaded hole (29).

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