Trundle with locking structure
By designing casters with locking structures, using ratchets and ratchet grooves to mesh with unidirectional teeth, the function of single-directional rotation is achieved, which solves the problems of low accuracy, easy fall off and poor safety performance in the prior art, improves applicability and safety performance, and reduces costs.
Patent Information
- Application Number
- CN202421453577.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-24
AI Technical Summary
The existing casters adopt the principle of external wire ring stopping, which has low accuracy, easy to fall off, poor safety performance, and poor suitability for single-direction rotation, high cost, and is not suitable for large-scale use.
A caster with a locking structure is designed to mesh with the one-way teeth through the ratchet and ratchet grooves to realize the function of single-direction rotation, and separate the one-way teeth from the ratchet and ratchet grooves when there is no need for one-way rotation, improving applicability.
The caster's single-direction rotation function is realized, which improves applicability and safety performance, reduces costs, and makes it suitable for large-scale installation and use.
Smart Images
Figure CN222819840U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casters, in particular to a caster with a locking structure. Background Art
[0002] Casters can help people move objects conveniently and are widely used. However, most existing casters use the principle of external wire ring braking. When the wheel rotates, the wire ring automatically disengages; when the wheel rotates in the opposite direction, the wire ring automatically locks according to the eccentric principle to achieve the purpose of one-way rotation. However, the external wire ring braking principle has low precision, is easy to fall off, and has poor safety performance.
[0003] For example, the Chinese patent: application number is 2016210801161, and the patent name is a one-way swivel caster, "including: a rim, a hub and an axle; the rim is arranged on the outside of the hub, and the rim wraps the hub; a circular through hole is arranged at the center of the hub, and a bearing is pressed on each side of the circular through hole, and a one-way bearing is arranged between the two bearings, and the axle vertically passes through the bearing and the one-way bearing." The caster in the above technology uses a one-way bearing to realize the rotation of the caster in a single direction when moving, but the scenes where the caster can only move in one direction are relatively rare. The caster that can only rotate in one direction has poor applicability and high cost, which is not conducive to large-scale use in ordinary factories. Casters are more likely to be able to move forward or backward so that they can be installed and used on a large scale. Utility Model Content
[0004] The utility model aims to provide a caster with a locking structure.
[0005] In order to achieve the above purpose, the utility model adopts the following scheme:
[0006] A caster with a locking structure comprises a mounting plate, a caster frame is provided at the bottom of the mounting plate, a first spindle is provided on the caster frame, a wheel is fixed on the first spindle, conical plates are provided at both ends of the first spindle, a plurality of ratchet teeth are provided in sequence along the circumference of the bottom, a plurality of ratchet grooves are provided in sequence along the circumference of the top of the conical plate, a movable shell coaxial with the conical plate is provided at both ends of the caster frame, a first one-way mechanism and a second one-way mechanism which can respectively engage with the ratchet grooves are provided on the inner wall of the movable shell, and a movable shell which can move along the circumference of the movable shell is hinged on the caster frame. A rocker arm for axial movement of the tapered plate is provided with a bearing between the caster frame and the mounting plate. The caster in the utility model can respectively mesh with the one-way teeth through the ratchet and the ratchet groove, thereby realizing the function of the caster rotating in a single direction, and a structure is provided on the caster that can make the one-way teeth mesh and separate or mesh with the ratchet and the ratchet groove at the same time. When the caster needs to rotate in one direction, the one-way teeth mesh and engage with the ratchet and the ratchet groove at the same time. When the caster does not need to rotate in one direction, the one-way teeth mesh and separate from the ratchet and the ratchet groove at the same time. In this way, the caster has strong applicability and can be installed and used on a large scale.
[0007] As a preferred solution of the utility model, the arc surface of the conical plate extends to one side surface of the ratchet, one end of the ratchet groove is arranged on the top of the conical plate, and the other end extends along the outer wall of the conical plate.
[0008] As a further solution of the utility model, the movable shell includes a conical outer shell coaxial with the conical plate, a plurality of guide plates are circumferentially provided on the outer wall of the conical outer shell, guide holes are provided on the guide plates, a first guide rod which can be extended into the guide hole is fixed on the caster frame, and a spring is sleeved on the first guide rod.
[0009] As a further solution of the utility model, the first one-way mechanism includes a plurality of first hinge blocks fixed on the inner wall of the conical outer shell and arranged in sequence along the circumference, a first one-way tooth that can engage with the ratchet is hinged on the first hinge block, a first limiting plate is fixed on one side of the first hinge block, a first coil spring is provided on one side of the first one-way tooth, and one end of the first coil spring is fixed on the hinge shaft of the first hinge block.
[0010] As a further solution of the utility model, the second one-way mechanism includes a plurality of second hinge blocks fixed on the inner wall of the conical outer shell and arranged in sequence along the circumference, a second one-way tooth that can engage with the ratchet groove is hinged on the second hinge block, a second limiting plate is fixed on one side of the second hinge block, a second coil spring is provided on one side of the second one-way tooth, and one end of the second coil spring is fixed on the hinge shaft of the second hinge block.
[0011] As a further solution of the utility model, the rocker arm includes a threaded barrel arranged at one end of the conical outer shell, a threaded rod is threadedly connected to the threaded barrel, an arc plate is fixed at one end of the threaded rod, a fixing plate is provided between the two arc plates, an arc guide groove coaxial with the first main axis is provided on the caster frame, and a second guide rod extending into the arc guide groove is fixed on the arc plate.
[0012] As a preferred solution of the utility model, the caster frame includes a rotating plate arranged below the mounting plate, and caster plates are symmetrically arranged at the bottom of the rotating plate. The first main shaft is rotatably arranged between the caster plates, and the first guide rod and the arc guide groove are respectively arranged on the caster plates.
[0013] As a preferred embodiment of the utility model, the bearing includes a mounting hole arranged on the axis of a rotating plate, a bearing outer ring is embedded in the mounting hole, a bearing inner ring is rotatably arranged in the bearing outer ring, a ball groove is provided between the bearing outer ring and the bearing inner ring, a plurality of balls are arranged in sequence along the circumference in the ball groove, and a second rotating shaft rotatably arranged on the bearing inner ring is provided at the bottom of the mounting plate.
[0014] To sum up, the utility model has the following beneficial effects compared with the prior art: the caster in the utility model can respectively mesh with the one-way teeth through the ratchet and the ratchet groove, so as to realize the function of the caster rotating in a single direction, and a structure is provided on the caster that can make the one-way teeth mesh and separate or mesh with the ratchet and the ratchet groove at the same time. When the caster needs to rotate in one direction, the one-way teeth mesh and engage with the ratchet and the ratchet groove at the same time. When the caster does not need to rotate in one direction, the one-way teeth mesh and separate from the ratchet and the ratchet groove at the same time. In this way, the caster has strong applicability and can be installed and used on a large scale. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a three-dimensional view of the utility model.
[0016] Figure 2 This is an exploded view of the utility model.
[0017] Figure 3 This is one of the cross-sectional views of the utility model.
[0018] Figure 4 This is the second cross-sectional view of the utility model.
[0019] Figure 5 For this utility model Figure 2 Magnified view at A in the middle.
[0020] Figure 6 For this utility model Figure 3 Magnified view at B.
[0021] Figure 7 This is a structural view of the moving shell in the utility model.
[0022] Description of reference numerals: 1, mounting plate; 2, first spindle; 20, caster frame; 3, wheel; 4, tapered plate; 5, ratchet; 6, ratchet groove; 20, caster frame; 40, moving shell; 60, first one-way mechanism; 70, second one-way mechanism; 80, swing rod; 90, bearing; 41, tapered housing; 42, guide plate; 43, guide hole; 44, first guide rod; 45, spring; 61, first hinge block; 62, first one-way tooth; 63 , first limit plate: 64, first coil spring: 71, second hinge block; 72, second one-way tooth; 73, second limit plate; 74, second coil spring: 81, threaded rod: 82, arc plate; 83, fixed plate; 84, arc guide groove; 85, second guide rod: 86, threaded tube: 21, rotating plate; 22, caster plate; 91, mounting hole; 92, bearing outer ring: 93, bearing inner ring: 94, ball groove; 95, ball; 96, second rotating shaft. 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 7A caster with a locking structure shown in the figure includes a mounting plate 1, a caster frame 20 is provided at the bottom of the mounting plate 1, a first main shaft 2 is provided on the caster frame 20, a wheel 3 is fixed on the first main shaft 2, conical plates 4 are respectively provided at both ends of the first main shaft 2, a plurality of ratchet teeth 5 are sequentially provided along the circumference at the bottom, a plurality of ratchet grooves 6 are sequentially provided along the circumference at the top of the conical plate 4, movable shells 40 coaxial with the conical plate 4 are respectively provided at both ends of the caster frame 20, a first one-way mechanism 60 and a second one-way mechanism 70 which can respectively engage with the ratchet groove 6 and the ratchet groove 6 are provided on the inner wall of the movable shell 40, a rocker rod 80 which can move the movable shell 40 along the axis of the conical plate 4 is hinged on the caster frame 20, and a bearing 90 is provided between the caster frame 20 and the mounting plate 1.
[0026] A further embodiment of the conical plate 4 in the present invention: the arcuate surface of the conical plate 4 extends to one side surface of the ratchet 5, one end of the ratchet groove 6 is set at the top of the conical plate 4, and the other end extends along the outer wall of the conical plate 4, one side of the ratchet 5 will be inclined and connected to the conical surface of the conical plate 4, so that the first one-way tooth 62 can be more convenient to engage with the ratchet 5, and the ratchet groove 6 will also be inclined and have the same inclination angle as the conical plate 4, so that the ratchet groove 6 and the second one-way tooth 72 can be better engaged.
[0027] A further embodiment of the movable shell 40 in the utility model: the movable shell 40 includes a conical outer shell 41 coaxial with the conical plate 4, a plurality of guide plates 42 are circumferentially arranged on the outer wall of the conical outer shell 41, a guide hole 43 is arranged on the guide plate 42, a first guide rod 44 which can be inserted into the guide hole 43 is fixed on the caster frame 20, a spring 45 is sleeved on the first guide rod 44, because casters are mostly used on vehicle bodies such as wheelbarrows, generally working outdoors, outdoor garbage and stones will be on the ground, the main function of the conical outer shell 41 is to place garbage and stones into the conical plate 4, so that they are stuck on the ratchet 5 and the ratchet groove 6.
[0028] A further embodiment of the first one-way mechanism 60 in the utility model: the first one-way mechanism 60 includes a plurality of first hinge blocks 61 fixed on the inner wall of the conical outer shell 41 and arranged in sequence along the circumference; a first one-way tooth 62 which can mesh with the ratchet 5 is hinged on the first hinge block 61; a first limiting plate 63 is fixed on one side of the first hinge block 61; a first coil spring 64 is provided on one side of the first one-way tooth 62; one end of the first coil spring 64 is fixed on the hinge shaft of the first hinge block 61; when the first one-way tooth 62 meshes with the ratchet 5, the caster can rotate in a single direction; the first limiting plate 63 can prevent the first one-way tooth 62 from reversing; the first coil spring 64 can reset the first one-way tooth 62 after flipping.
[0029] A further embodiment of the second one-way mechanism 70 in the utility model: the second one-way mechanism 70 includes a plurality of second hinge blocks 71 fixed on the inner wall of the conical shell 41 and arranged in sequence along the circumference; a second one-way tooth 72 which can mesh with the ratchet groove 6 is hinged on the second hinge block 71; a second limiting plate 73 is fixed on one side of the second hinge block 71; a second coil spring 74 is provided on one side of the second one-way tooth 72; one end of the second coil spring 74 is fixed on the hinge shaft of the second hinge block 71; after the second one-way tooth 72 meshes with the ratchet groove 6, it will further ensure that the caster moves in a single direction; the one-way mechanism is designed with two groups. This has the advantage that when the one-way teeth on one group of the one-way mechanism break, the one-way teeth on the other group can still ensure that the caster moves in a single direction.
[0030] A further embodiment of the swing rod 80 in the utility model: the swing rod 80 includes a threaded barrel 86 arranged at one end of the conical shell 41, a threaded rod 81 is threadedly connected to the threaded barrel 86, an arc plate 82 is fixed at one end of the threaded rod 81, a fixing plate 83 is provided between the two arc plates 82, an arc guide groove 84 coaxial with the first main shaft 2 is provided on the caster frame 20, and a second guide rod 85 extending into the arc guide groove 84 is fixed on the arc plate 82. In the initial state, the ratchet 5 and the ratchet groove 6 will be separated from the first one-way tooth 62 and the second one-way tooth 72 respectively. When the user needs the caster to rotate in a single direction, he only needs to step on the fixing plate 83 to make the arc plate 82 swing, so that the threaded rod 81 drives the threaded barrel 86 to move, and the conical shell 41 can move, so that the ratchet 5 and the ratchet groove 6 will be engaged with the first one-way tooth 62 and the second one-way tooth 72 respectively, so that the caster can rotate in a single direction.
[0031] A further embodiment of the caster frame 20 in the utility model: the caster frame 20 includes a rotating plate 21 arranged below the mounting plate 1, and caster plates 22 are symmetrically arranged at the bottom of the rotating plate 21, the first main shaft 2 is rotatably arranged between the caster plates 22, and the first guide rod 44 and the arc guide groove 84 are respectively arranged on the caster plates 22.
[0032] A further embodiment of the bearing 90 in the present invention: the bearing 90 includes a mounting hole 91 arranged on the axis of the rotating plate 21, a bearing outer ring 92 is embedded in the mounting hole 91, a bearing inner ring 93 is rotatably arranged in the bearing outer ring 92, a ball groove 94 is provided between the bearing outer ring 92 and the bearing inner ring 93, and a plurality of balls 95 are sequentially arranged along the circumference in the ball groove 94, a second rotating shaft 96 rotatably arranged on the bearing inner ring 93 is provided at the bottom of the mounting plate 1, and the main function of the bearing 90 is to reduce friction when the caster rotates 360 degrees, so that the caster can rotate better.
[0033] When in use: in the initial state, the ratchet 5 and the ratchet groove 6 will be separated from the first one-way tooth 62 and the second one-way tooth 72 respectively. When the user needs the caster to rotate in a single direction, he only needs to step on the fixing plate 83 to make the arc plate 82 swing, so that the threaded rod 81 drives the threaded cylinder 86 to move, and the conical shell 41 can move, so that the ratchet 5 and the ratchet groove 6 will be engaged with the first one-way tooth 62 and the second one-way tooth 72 respectively, so that the caster can rotate in a single direction. Because casters are mostly used on carts and other vehicle bodies, they usually work outdoors, and outdoor garbage and stones will be on the ground. The main function of the conical shell 41 is to place garbage and stones into the conical shell. Plate 4 is stuck on the ratchet 5 and the ratchet groove 6. When the first one-way tooth 62 is engaged with the ratchet 5, the caster can rotate in a single direction. The first limit plate 63 can prevent the first one-way tooth 62 from reversing. The first coil spring 64 can reset the first one-way tooth 62 after flipping. After the second one-way tooth 72 is engaged with the ratchet groove 6, it will further ensure that the caster moves in a single direction. The one-way mechanism is designed with two groups. The advantage of this is that when the one-way teeth on one group of the one-way mechanism break, the one-way teeth on the other group can still ensure that the caster moves in a single direction. The main function of the bearing 90 is to reduce friction when the caster rotates 360 degrees, so that the caster can rotate better.
[0034] 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 locking structure, comprising a mounting plate (1), a caster frame (20) provided at the bottom of the mounting plate (1), a first main shaft (2) provided on the caster frame (20), a wheel (3) fixed on the first main shaft (2), characterized in that: Conical plates (4) are provided at both ends of the first main shaft (2), a plurality of ratchet teeth (5) are provided in sequence along the circumference of the bottom, a plurality of ratchet grooves (6) are provided in sequence along the circumference of the top of the conical plate (4), a movable shell (40) coaxial with the conical plate (4) is provided at both ends of the caster frame (20), a first one-way mechanism (60) and a second one-way mechanism (70) are provided on the inner wall of the movable shell (40) and can respectively engage with the ratchet grooves (6), a rocker (80) is hinged on the caster frame (20) and can move the movable shell (40) along the axis of the conical plate (4), and a bearing (90) is provided between the caster frame (20) and the mounting plate (1).
2. The caster with a locking structure according to claim 1, characterized in that: The arc surface of the conical plate (4) extends to one side surface of the ratchet (5); one end of the ratchet groove (6) is arranged on the top of the conical plate (4) and the other end extends along the outer wall of the conical plate (4).
3. The caster with a locking structure according to claim 2, characterized in that: The movable shell (40) includes a conical outer shell (41) coaxial with the conical plate (4), a plurality of guide plates (42) are circumferentially arranged on the outer wall of the conical outer shell (41), a guide hole (43) is arranged on the guide plate (42), a first guide rod (44) which can extend into the guide hole (43) is fixed on the caster frame (20), and a spring (45) is sleeved on the first guide rod (44).
4. The caster with a locking structure according to claim 3, characterized in that: The first one-way mechanism (60) comprises a plurality of first hinge blocks (61) fixed on the inner wall of the conical outer shell (41) and arranged in sequence along the circumference; a first one-way tooth (62) which can mesh with the ratchet tooth (5) is hinged on the first hinge block (61); a first limiting plate (63) is fixed on one side of the first hinge block (61); a first coil spring (64) is arranged on one side of the first one-way tooth (62); one end of the first coil spring (64) is fixed on the hinge shaft of the first hinge block (61).
5. The caster with a locking structure according to claim 3, characterized in that: The second one-way mechanism (70) comprises a plurality of second hinge blocks (71) fixed on the inner wall of the conical outer shell (41) and arranged in sequence along the circumference; a second one-way tooth (72) capable of engaging with the ratchet groove (6) is hinged on the second hinge block (71); a second limiting plate (73) is fixed on one side of the second hinge block (71); a second coil spring (74) is arranged on one side of the second one-way tooth (72); one end of the second coil spring (74) is fixed on the hinge shaft of the second hinge block (71).
6. The caster with a locking structure according to claim 3, characterized in that: The swing rod (80) comprises a threaded barrel (86) arranged at one end of a conical housing (41), a threaded rod (81) is threadedly connected to the threaded barrel (86), an arc plate (82) is fixed to one end of the threaded rod (81), a fixing plate (83) is provided between the two arc plates (82), an arc guide groove (84) coaxial with the first main shaft (2) is provided on the caster frame (20), and a second guide rod (85) extending into the arc guide groove (84) is fixed on the arc plate (82).
7. The caster with a locking structure according to claim 6, characterized in that: The caster frame (20) comprises a rotating plate (21) arranged below the mounting plate (1), caster plates (22) are symmetrically arranged at the bottom of the rotating plate (21), the first main shaft (2) is rotatably arranged between the caster plates (22), and the first guide rod (44) and the arc-shaped guide groove (84) are respectively arranged on the caster plates (22).
8. The caster with a locking structure according to claim 7, characterized in that: The bearing (90) comprises a mounting hole (91) arranged on the axis of a rotating plate (21), a bearing outer ring (92) is embedded in the mounting hole (91), a bearing inner ring (93) is rotatably arranged in the bearing outer ring (92), a ball groove (94) is provided between the bearing outer ring (92) and the bearing inner ring (93), a plurality of balls (95) are sequentially arranged along the circumference in the ball groove (94), and a second rotating shaft (96) rotatably arranged on the bearing inner ring (93) is provided at the bottom of the mounting plate (1).