Full-locking trundle

Abstract

The utility model discloses a full-locking trundle which comprises a fixing plate, a trundle frame is arranged at the bottom of the fixing plate, a mounting plate capable of being mounted on a vehicle body is arranged above the trundle frame, and a bearing set capable of enabling the mounting plate to rotate along the axis of the fixing plate is arranged between the mounting plate and the fixing plate. Wheels are rotationally arranged at the bottom end of the trundle frame and comprise a first locking mechanism, a second locking mechanism, a pedal set and a buckle set, the first locking mechanism fixes the trundle frame to prevent the trundle frame from rotating around the axis of the mounting plate by treading the pedal set forcefully, the second locking mechanism enables the brake pad to press the wheels at the same time, the wheels cannot rotate any more, and therefore the trundle frame can rotate around the axis of the mounting plate. And the buckle group can fix the pedal group and cannot automatically reset, so that the caster can enter a full-locking state, and the caster can enter the full-locking state only by forcibly treading the pedal group by a user without a tool for cooperative work.

Description

Technical Field

[0001] This utility model relates to the field of casters, and in particular to a fully locking caster. Background Technology

[0002] Fully locking casters are casters with a locking mechanism. Their main function is to secure the caster when needed to prevent equipment or items from moving or sliding accidentally. Fully locking casters achieve their locking function through friction or mechanical structures. Common locking methods include side brakes, rear brakes, single brakes, double brakes, and self-locking brakes.

[0003] For example, Chinese patent application number 201810287304.9, entitled "A Fully Locking Caster," describes a locking mechanism comprising a shift drive rod and a spring sheet. The shift drive rod and spring sheet are arranged vertically opposite each other. The shift drive rod includes a shift drive rod body and a locking bar, with the shift drive rod body and locking bar vertically connected. A plurality of positioning blocks are evenly arranged in a circular array on the locking surface of the spring sheet opposite the locking bar. The shift drive rod body moves downward, driving the locking bar to engage between any two adjacent positioning blocks, thus completing the locking. A cam also has a first contact surface and a second contact surface. When the cam rotates to its first extreme position, a top block presses against the first contact surface. When the cam rotates to its second extreme position, the top block presses against the second contact surface. The cam also includes a bracket and a wheel body. The body and the bracket are rotatably connected, the lifting device is vertically connected to the bracket, the gear shift drive rod body is slidably connected to the bracket, and the spring sheet is fixedly connected to the bracket; the bracket includes a protective cover, a bracket body, a hollow insert rod, and a spring; the protective cover is installed on the outside of the wheel body, the hollow insert rod is connected to the bracket body; the drive rod body is slidably connected to the hollow insert rod, and the spring is sleeved on the drive rod body, with both ends fixedly connected to the hollow insert rod and the top block respectively. As described above, in the above technology, to put the caster into a fully locked state, a tool is needed to rotate the cam to put the caster into a fully locked state. That is, the user needs to wear a tool that can rotate the cam for a long time. If the user forgets to wear the tool that rotates the cam or loses the tool that rotates the cam, the user will not be able to put the caster into a fully locked state. Utility Model Content

[0004] The purpose of this invention is to provide a fully locking caster.

[0005] To achieve the above objectives, the present invention adopts the following solution:

[0006] A fully locking caster includes a fixed plate, a caster bracket at the bottom of the fixed plate, a mounting plate above the caster bracket for mounting on a vehicle body, a bearing assembly between the mounting plate and the fixed plate allowing the mounting plate to rotate along the axis of the fixed plate, and a wheel rotatably mounted at the bottom end of the caster bracket.

[0007] The first locking mechanism has a first annular groove on the top of the fixed plate and a second annular groove on the bottom of the mounting plate. An annular rack is provided in the first annular groove, and a plurality of teeth that can mesh with the annular rack are provided in sequence in the second annular groove. The first locking mechanism is provided at the bottom of the annular rack.

[0008] The second locking mechanism has a first guide groove symmetrically provided on the outer wall of the caster frame, inclined towards the wheel axle, a first guide rod provided between the first guide grooves, a brake pad provided on the first guide rod, and a second locking mechanism provided on the brake pad.

[0009] The pedal assembly has a first rotating shaft rotatably mounted on the caster frame, and a pedal assembly that can synchronously drive the first locking mechanism and the second locking mechanism to work on the first rotating shaft;

[0010] A buckle assembly is provided on the caster frame to fix the first rotating shaft.

[0011] As a further embodiment of this utility model, the bearing assembly includes a through hole provided on the axis of the fixed plate, a bearing is embedded in the through hole, a first fixed shaft that can extend into the bearing is fixed at the bottom of the mounting plate, and a positioning plate is provided at the bottom of the first fixed shaft.

[0012] As a further embodiment of the present invention, the pedal assembly includes a swing arm fixed on a first rotating shaft, a pedal is provided at one end of the swing arm, and an arc-shaped hinge plate is provided on the side of the first rotating shaft away from the swing arm.

[0013] As a further embodiment of this utility model, the first locking mechanism includes a second guide groove symmetrically arranged on the caster frame, a second guide rod provided between the second guide grooves, a first arc-shaped connecting plate hinged between the arc-shaped hinge plate and the second guide rod, and fixing rods symmetrically provided at both ends of the arc-shaped hinge plate, one end of the fixing rod extending into the first annular groove and fixed to the bottom of the annular rack.

[0014] As a further embodiment of this utility model, a plurality of fixing blocks are arranged sequentially along the circumference of the first annular groove, and a third guide rod is fixed at the bottom of the fixing blocks. One end of the third guide rod passes through the annular rack and is fixed on the inner wall of the bottom of the first annular groove. A first spring is sleeved on the third guide rod.

[0015] As a further embodiment of this utility model, the second locking mechanism includes an arc-shaped spring sheet fixed between the brake pad and the rocker arm, and wave-shaped spring sheets fixed at both ends of the arc-shaped spring sheet.

[0016] As a further embodiment of this utility model, a plurality of anti-slip grooves are sequentially provided on the inner wall of the brake pad.

[0017] As a further embodiment of this utility model, the buckle assembly includes a first hook fixed to one end of a first rotating shaft, a second fixed shaft fixed to one side of the caster frame, a second hook hinged to the second fixed shaft that can cooperate with the first hook, and a coil spring provided between the second hook and the second fixed shaft.

[0018] In summary, the advantages of this utility model over the prior art are as follows: This utility model can prevent the caster frame from rotating along the axis of the mounting plate by pressing the pedal assembly forcefully, while the second locking mechanism simultaneously presses the wheel with the brake pads, preventing the wheel from rotating. The buckle assembly can fix the pedal assembly in place so that it cannot reset on its own. In this way, the caster can enter a fully locked state. The user only needs to press the pedal assembly forcefully to put the caster into a fully locked state without the need for tools. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the present invention.

[0020] Figure 2 This is one of the exploded views of this utility model.

[0021] Figure 3 This is the second exploded view of the present invention.

[0022] Figure 4 This is a cross-sectional view of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Fixing plate; 2. Caster frame; 3. Mounting plate; 4. Wheel; 90. Bearing assembly; 20. First locking mechanism; 5. First annular groove; 6. Second annular groove; 7. Annular rack; 8. Tooth; 30. Second locking mechanism; 10. First guide rod; 11. Brake pad; 40. Pedal assembly; 12. First pivot; 50. Buckle assembly; 91. Through hole; 92. Bearing; 93. First fixed shaft; 94. Positioning plate; 41. Swing rod; 42. Pedal; 43. Arc-shaped hinge plate; 21. Through groove; 22. Second guide rod; 23. First arc-shaped connecting plate; 24. Fixing rod; 25. Fixing block; 26. Third guide rod; 27. First spring; 31. Arc-shaped spring piece; 32. Wavy spring piece; 33. Anti-slip groove; 51. First hook; 52. Second fixed shaft; 53. Second hook; 54. Coil spring. Detailed Implementation

[0024] The following detailed description provides various embodiments or examples for implementing the utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the utility model and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0025] Furthermore, spatial terms may be used, such as "below," "lower," "from the inside out," "above," "upper," and similar terms. These relational terms are used to facilitate the description of the relationship between some elements or features in the drawings and other elements or features. These spatial relational terms 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, degrees of rotation, or other orientations, and the spatially related adjectives used therein can be interpreted in the same way. Therefore, they should not be construed as limitations on the utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0026] The utility model will be further described below with reference to the accompanying drawings and specific embodiments: Figures 1 to 4 The fully locking caster shown includes a fixed plate 1, a caster frame 2 at the bottom of the fixed plate 1, a mounting plate 3 above the caster frame 2 for mounting on a vehicle body, a bearing assembly 90 between the mounting plate 3 and the fixed plate 1 allowing the mounting plate 3 to rotate around the axis of the fixed plate 1, and a wheel 4 rotatably mounted at the bottom end of the caster frame 2.

[0027] The first locking mechanism 20 has a first annular groove 5 on the top of the fixed plate 1 and a second annular groove 6 on the bottom of the mounting plate 3. An annular rack 7 is provided in the first annular groove 5, and a plurality of teeth 8 that can mesh with the annular rack 7 are provided in the second annular groove 6 in sequence. The first locking mechanism 20 is provided at the bottom of the annular rack 7.

[0028] The second locking mechanism 30 has a first guide groove 9 symmetrically provided on the outer wall of the caster frame 2, inclined towards the axis of the wheel 4, a first guide rod 10 provided between the first guide grooves 9, a brake pad 11 provided on the first guide rod 10, and a second locking mechanism 30 provided on the brake pad 11.

[0029] The pedal assembly 40 has a first rotating shaft 12 rotatably mounted on the caster frame 2, and the first rotating shaft 12 is provided with a pedal assembly 40 that can synchronously drive the first locking mechanism 20 and the second locking mechanism 30 to work.

[0030] The fastener assembly 50 is provided on the caster frame 2 to fix the first rotating shaft 12.

[0031] A further embodiment of the bearing assembly 90 in this utility model: The bearing assembly 90 includes a through hole 91 provided on the axis of the fixed plate 1, a bearing 92 is embedded in the through hole 91, a first fixed shaft 93 that can extend into the bearing 92 is fixed at the bottom of the mounting plate 3, and a positioning plate 94 is provided at the bottom of the first fixed shaft 93.

[0032] A further embodiment of the pedal assembly 40 in this utility model: The pedal assembly 40 includes a rocker arm 41 fixed on a first rotating shaft 12, a pedal 42 is provided at one end of the rocker arm 41, and an arc-shaped hinge plate 43 is provided on the side of the first rotating shaft 12 away from the rocker arm 41.

[0033] A further embodiment of the first locking mechanism 20 in this utility model: The first locking mechanism 20 includes a second guide groove 21 symmetrically arranged on the caster frame 2, a second guide rod 22 provided between the second guide grooves 21, a first arc-shaped connecting plate 23 hinged between the arc-shaped hinge plate 43 and the second guide rod 22, and fixing rods 24 symmetrically provided at both ends of the arc-shaped hinge plate 43, one end of the fixing rod 24 extending into the first annular groove 5 and fixed to the bottom of the annular rack 7.

[0034] A further embodiment of the first annular groove 5 in this utility model: a plurality of fixing blocks 25 are arranged sequentially along the circumference of the first annular groove 5, and a third guide rod 26 is fixed at the bottom of the fixing block 25. One end of the third guide rod 26 passes through the annular rack 7 and is fixed on the inner wall of the bottom of the first annular groove 5. A first spring 27 is sleeved on the third guide rod 26.

[0035] A further embodiment of the second locking mechanism 30 in this utility model: The second locking mechanism 30 includes an arc-shaped spring piece 31 fixed between the brake pad 11 and the rocker arm 41, and wave-shaped spring pieces 32 fixed at both ends of the arc-shaped spring piece 31.

[0036] A further embodiment of the brake pad 11 in this utility model: a plurality of anti-slip grooves 33 are sequentially provided on the inner wall of the brake pad 11.

[0037] A further embodiment of the buckle assembly 50 in this utility model: The buckle assembly 50 includes a first hook 51 fixed to one end of the first rotating shaft 12, a second fixed shaft 52 fixed to one side of the caster frame 2, a second hook 53 hinged to the second fixed shaft 52 that can cooperate with the first hook 51, and a coil spring 54 provided between the second hook 53 and the second fixed shaft 52.

[0038] In use: When the user needs to put the caster into the fully locked working state, simply step on the pedal 42 to swing the swing arm 41. At this time, the first arc-shaped connecting plate 23 will push the fixing rod 24 upward, and the ring rack 7 will move upward, so that the ring rack 7 and the teeth 8 will mesh. In this way, the caster frame can no longer rotate along the axis of the mounting plate. At the same time, the brake pad 11 will also move downward. Under the action of the arc-shaped spring 31 and the wave-shaped spring 32, the brake pad 11 is pressed tightly onto the wheel 4. Finally, the first hook 51 and the second hook 53 are engaged with each other under the action of the coil spring 54, so that the first rotating shaft 12 is fixed and cannot be reset by itself. In this way, the caster can enter the fully locked state.

[0039] The foregoing has shown and described the basic principles and main features of the utility model, as well as its advantages. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the utility model. Various changes and modifications can be made to the utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A fully locking caster, comprising a fixed plate (1), a caster frame (2) at the bottom of the fixed plate (1), a mounting plate (3) for mounting on a vehicle body above the caster frame (2), a bearing assembly (90) between the mounting plate (3) and the fixed plate (1) for rotating the mounting plate (3) along the axis of the fixed plate (1), and a wheel (4) rotatably mounted at the bottom end of the caster frame (2), characterized in that: The first locking mechanism (20) has a first annular groove (5) at the top of the fixed plate (1) and a second annular groove (6) at the bottom of the mounting plate (3). An annular rack (7) is provided in the first annular groove (5), and a plurality of teeth (8) that can mesh with the annular rack (7) are provided in the second annular groove (6). The first locking mechanism (20) is provided at the bottom of the annular rack (7). The second locking mechanism (30) has a first guide groove (9) symmetrically provided on the outer wall of the caster frame (2) and inclined towards the axis of the wheel (4). A first guide rod (10) is provided between the first guide grooves (9). A brake pad (11) is provided on the first guide rod (10). The second locking mechanism (30) is provided on the brake pad (11). The pedal assembly (40) has a first rotating shaft (12) rotatably mounted on the caster frame (2), and the pedal assembly (40) is mounted on the first rotating shaft (12) to synchronously drive the first locking mechanism (20) and the second locking mechanism (30). A buckle assembly (50) is provided on the caster frame (2) to fix the first rotating shaft (12).

2. The fully locking caster according to claim 1, characterized in that, The bearing assembly (90) includes a through hole (91) provided on the axis of the fixed plate (1), a bearing (92) is embedded in the through hole (91), a first fixed shaft (93) that can extend into the bearing (92) is fixed at the bottom of the mounting plate (3), and a positioning plate (94) is provided at the bottom of the first fixed shaft (93).

3. A fully locking caster according to claim 1, characterized in that, The pedal assembly (40) includes a rocker arm (41) fixed on a first rotating shaft (12), a pedal (42) is provided at one end of the rocker arm (41), and an arc-shaped hinge plate (43) is provided on the side of the first rotating shaft (12) away from the rocker arm (41).

4. A fully locking caster according to claim 3, characterized in that, The first locking mechanism (20) includes a second guide groove (21) symmetrically arranged on the caster frame (2), a second guide rod (22) is provided between the second guide groove (21), a first arc-shaped connecting plate (23) is hinged between the arc-shaped hinge plate (43) and the second guide rod (22), and a fixing rod (24) is symmetrically provided at both ends of the arc-shaped hinge plate (43). One end of the fixing rod (24) extends into the first annular groove (5) and is fixed to the bottom of the annular rack (7).

5. A fully locking caster according to claim 3, characterized in that, Multiple fixing blocks (25) are arranged in sequence along the circumference of the first annular groove (5). A third guide rod (26) is fixed at the bottom of the fixing block (25). One end of the third guide rod (26) passes through the annular rack (7) and is fixed on the inner wall of the bottom of the first annular groove (5). A first spring (27) is sleeved on the third guide rod (26).

6. A fully locking caster according to claim 3, characterized in that, The second locking mechanism (30) includes an arc-shaped spring (31) fixed between the brake pad (11) and the rocker arm (41), and wave-shaped springs (32) fixed at both ends of the arc-shaped spring (31).

7. A fully locking caster according to claim 6, characterized in that, Multiple anti-slip grooves (33) are sequentially provided on the inner wall of the brake pad (11).

8. A fully locking caster according to claim 1, characterized in that, The buckle assembly (50) includes a first hook (51) fixed to one end of a first rotating shaft (12), a second fixed shaft (52) fixed to one side of the caster frame (2), a second hook (53) hinged to the second fixed shaft (52) to cooperate with the first hook (51), and a coil spring (54) provided between the second hook (53) and the second fixed shaft (52).

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