A non-rotatable eccentric snap-lock type steering mechanism

Abstract

A non-rotatable eccentric snap-fit ​​steering mechanism, which relates to the technical field of casters. It comprises a fixed seat, on which a mounting groove is provided; a bearing, in which the bearing is arranged in the mounting groove, and a rotating part on one side of the bearing is connected to the fixed seat; a wheel frame, in which the wheel frame is connected to a rotating part on the other side of the bearing; a wheel body, in which the wheel body is rotatably arranged on the wheel frame, and the steering axis centerline of the wheel body coincides with the axis centerline of the bearing; and a connecting assembly, in which a part of the connecting assembly is arranged on the wheel frame, and the other part is arranged on the bearing, and the axis centerline of the connecting part between the two parts is eccentric to the axis centerline of the bearing. The steering mechanism adopting the above technical solution has the advantages of being able to make the steering axis centerline of the wheel axle and the axis centerline of the steering bearing rotating shaft tend to rotate coaxially, realizing steering movement at any angle, and having a stable center of gravity and a small steering space when rotating.

Description

Technical Field

[0001] The invention relates to the technical field of casters, and in particular to a non-rotatable eccentric snap-lock type steering mechanism. Background Art

[0002] With the development of science and technology and the continuous improvement of people's living standards, more and more equipment needs to be moved, and casters have become an indispensable component. Casters are installed at the bottom of the equipment, which can make the equipment move conveniently and labor-saving, greatly improving efficiency. Casters mainly include movable casters and fixed casters. Movable casters are what we call universal wheels. Fixed casters can only move forward and backward, while universal wheels can not only move forward and backward, but also rotate 360 ​​degrees in the horizontal direction to control the direction of movement. Universal wheels are widely used in many industries and various fields such as mining, mechanical equipment, electronic equipment, medical equipment, engineering decoration, textiles, printing and dyeing, furniture, logistics equipment, warehousing, turnover vehicles, chassis, cabinets, equipment, electromechanical, dust-free workshops, production lines, large supermarkets, etc. The commonly used steering wheel is to deviate from the steering axis of the wheel axle of the wheel in the spatial structure, so as to obtain torque to achieve steering movement. The overall center of gravity of the wheel frame of the steering wheel relative to the steering axis of the wheel axle is unstable and the steering space is large. Summary of the invention

[0003] The purpose of the present invention is to provide a non-rotatable eccentric snap-lock steering mechanism in view of the defects and shortcomings of the prior art, which can make the steering axis centerline of the wheel axle and the axis centerline of the steering bearing shaft tend to rotate coaxially, realize steering movement at any angle, and have the advantages of stable center of gravity and small steering space during rotation.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a non-rotatable eccentric snap-on steering mechanism, comprising: a fixed seat, a mounting groove is provided on the fixed seat; a bearing, the bearing is arranged in the mounting groove, and the rotating part on one side of the bearing is connected to the fixed seat; a wheel frame, the wheel frame is connected to the rotating part on the other side of the bearing; a wheel body, the wheel body is rotatably arranged on the wheel frame, and the steering axis centerline of the wheel body coincides with the axis centerline of the bearing; and a connecting component, a part of the connecting component is arranged on the wheel frame, and the other part is arranged on the bearing, and the axis centerline of the connecting part between the two parts is eccentric to the axis centerline of the bearing.

[0005] The connecting part is a snap fastener, which is provided with no less than two snap fasteners and is eccentric and non-rotatable. When the snap fastener is loosened or tightened, the resultant force formed when the steering mechanism turns can generate torque on the wheel frame and the wheel body.

[0006] The connecting assembly includes: a connecting plate, which is fixedly assembled with the inner ring of the bearing, and a first connecting hole is provided on the connecting plate, a second connecting hole corresponding to the first connecting hole is provided on the wheel frame, and the first connecting hole and the second connecting hole are penetrated by the buckle; a protrusion, which is arranged on a side of the connecting plate away from the bearing, and the protrusion penetrates the wheel frame; and a latch, which is provided with a positioning hole perpendicular to the installation direction of the protrusion, and the latch is penetrated by the positioning hole for detachably assembling the connecting plate and the wheel frame.

[0007] The snap fastener is a non-rigid connecting piece.

[0008] A clamping block is provided on the inner ring wall of the bearing, and a mounting block is provided on one end of the connecting plate away from the protrusion. The mounting block is embedded in the inner ring of the bearing, and the clamping block is clamped with the mounting block.

[0009] An extension ring is connected to one side of the bearing inner ring close to the connecting plate.

[0010] The bearing inner ring and the extension ring are integrally formed or welded.

[0011] The fixing seat is provided with a mounting hole for assembling with external equipment.

[0012] The fixing seat is arranged in a square shape.

[0013] There are four mounting holes, which are respectively arranged at the four corners of the fixing base.

[0014] After adopting the above technical solution, the beneficial effects of the present invention are:

[0015] 1. A mounting groove is provided on the fixed seat, the bearing is arranged in the mounting groove, the rotating part on one side of the bearing is connected to the fixed seat, the wheel frame is connected to the rotating part on the other side of the bearing, the wheel body is rotatably arranged on the wheel frame, the steering axis of the wheel body coincides with the axis of the bearing, a part of the connecting assembly is arranged on the wheel frame, and the other part is arranged on the bearing, and the axis of the connecting part between the two parts is eccentric with the axis of the bearing. The steering mechanism arranged in this way effectively solves the problem that the existing steering wheel is to deviate from the steering axis of the wheel axle of the wheel-to-wheel in the spatial structure by the steering bearing, so as to obtain the torque to realize the steering movement, the wheel frame of the steering wheel as a whole has unstable center of gravity swing relative to the steering axis of the wheel axle, and the steering space is large, and the steering axis of the wheel axle and the steering bearing rotating shaft can be made to rotate coaxially, so as to realize the steering movement at any angle, and the center of gravity of the steering mechanism is stable and the steering space is small when rotating.

[0016] 2. A clamping block is provided on the wall of the inner ring of the bearing, and a mounting block is provided on the end of the connecting plate away from the protrusion. The mounting block is embedded in the inner ring of the bearing, and the clamping block is clamped with the mounting block. An extension ring is connected to the side of the inner ring of the bearing close to the connecting plate. The extension ring is used to extend the length of the inner ring of the bearing. The extension ring is used for the mounting block to be embedded, thereby increasing the distance between the connecting plate and the bearing and the fixed seat to prevent the connecting plate from causing friction with the fixed seat when rotating. It is not only used to improve the durability of the connecting plate and the fixed seat, but also the extension ring and mounting block arranged in this way make the steering of the entire device more flexible.

[0017] 3. A connecting assembly is provided between the wheel frame and the bearing, one part of which is fixedly assembled with the bearing, and the other part is detachably assembled with the wheel frame, so that disassembly is convenient without affecting the firmness of the whole device, and replacement and transportation of the whole device are also convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It corresponds to Figure 1 Exploded diagram of

[0021] Figure 3 The turning vertical center line of the present invention.

[0022] Explanation of the reference numerals: 1. fixing seat; 11. mounting groove; 12. mounting hole; 2. bearing; 21. extension ring; 22. clamping block; 3. connecting plate; 31. mounting block; 32. first connecting hole; 33. snap hook; 331. gasket; 34. protrusion; 341. clamping hole; 4. wheel frame; 41. fixing plate; 411. second connecting hole; 42. side plate; 421. third connecting hole; 43. latch; 44. fastener; 45. axle; 5. wheel body. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0025] This embodiment relates to a non-rotatable eccentric snap-fit ​​steering mechanism, such as Figure 1 As shown, it includes: a fixed seat 1, a bearing 2, a snap button 33, a wheel frame 4 and a wheel body 5.

[0026] The fixing seat 1 is provided with a mounting groove 11, and the bearing 2 is arranged in the mounting groove 11. The outer ring of the bearing 2 is connected to the fixing seat 1, and the outer ring of the bearing 2 is fixed to the fixing seat 1. The inner ring of the bearing 2 can rotate relative to the fixing seat 1. The wheel frame 4 is connected to the inner ring of the bearing 2, so that the wheel frame 4 can rotate relative to the fixing seat 1, thereby realizing the steering function of the device. The wheel body 5 is rotatably arranged on the wheel frame 4, and the steering axis center line of the wheel body 5 coincides with the axis center line of the bearing 2. One part of the connecting component is arranged on the wheel frame, and the other part is arranged on the bearing 2. The axis center line of the connecting part between the two parts is eccentric to the axis center line of the bearing 2. The connecting part is a snap button 33. There are no less than two snap buttons 33 and the eccentricity cannot be rotatable. After the snap button 33 is loosened, the resultant force formed when the steering mechanism turns can generate torque on the wheel frame 4 and the wheel body 5. When the wheel body 5 turns, the wheel frame 4 rotates horizontally through the connected bearing 2, thereby realizing the horizontal 360-degree steering of the wheel body 5. In this embodiment, the fixing seat 1 is square, the mounting groove 11 is arranged at the center of the fixing seat 1, and the mounting groove 11 is circular and penetrates the fixing seat 1. The bearing 2 is a ball bearing 2 or a roller bearing 2. The fixing seat 1 is provided with mounting holes 12 for assembly with external equipment. There are four mounting holes 12, which are respectively arranged at the four corners of the fixing seat 1. The mounting holes 12 can be installed on the external equipment by screws or nails, thereby completing the installation of the fixing seat 1. When looking up, the layout of the snap fasteners 33 is equidistant relative to the steering vertical center line of the bearing 2. In other embodiments, the inner ring of the bearing 2 is connected to the fixing seat 1, and the wheel frame 4 is connected to the outer ring of the bearing 2.

[0027] Preferably, if Figure 2 As shown, a connecting assembly is provided between the wheel frame 4 and the bearing 2 , and the connecting assembly allows the wheel frame 4 and the bearing 2 to be detachably assembled. The connecting assembly includes: a first connecting hole 32 of the connecting plate 3 , a second connecting hole 411 , a protrusion 34 , a locking hole 341 and a latch 43 .

[0028] The connecting plate 3 and the inner ring of the bearing 2 are detachably assembled, a first connecting hole 32 is provided on the connecting plate 3, a second connecting hole 411 corresponding to the first connecting hole 32 is provided on the wheel frame 4, a snap hook 33 passes through the first connecting hole 32 and the second connecting hole 411, so as to prevent the snap hook 33 from accidentally falling off after the connecting plate 3 and the wheel frame 4 are loosened and tightened by the snap hook 33, a protrusion 34 is arranged on the side of the connecting plate 3 away from the bearing 2, the protrusion 34 passes through the wheel frame 4, a positioning hole 341 perpendicular to the installation direction of the protrusion 34 is provided on the protrusion 34, a latch 43 passes through the positioning hole 341 for detachably assembling the connecting plate 3 and the wheel frame 4, so as to further fix and assemble the wheel frame 4 and the connecting plate 3, the connecting plate 3 and the wheel frame 4 can be separated by pulling out the latch 43 and removing the snap hook 33, so as to facilitate replacement and transportation. In this embodiment, the cross-sectional area of ​​the wheel frame 4 is ∏-shaped, the second connecting hole 411 is arranged at the top of the wheel frame 4, the connecting plate 3 is arranged in a circular shape, the diameter of the connecting plate 3 is the same as the length of the wheel frame 4, the first connecting hole 32 is arranged on the side of the circular connecting plate 3 that is biased towards the outer circle, the first connecting hole 32 corresponds to the second connecting hole 411, and the first connecting hole 32 and the second connecting hole 411 are each provided with at least two to improve the stability after assembly. The snap 33 is columnar. The snap 33 is a bolt. The protrusion 34 is arranged in a columnar shape. The protrusion 34 can be replaced by the snap 33, and the snap 33 can also be replaced by the protrusion 34. The wheel frame 4 is composed of a fixing plate 41 and a side plate 42. The fixing plate 41 and the connecting plate 3 can be detachably assembled, and a through hole for the protrusion 34 to pass through is opened at the midpoint of the fixing plate 41. A gasket 331 aligned with the second connection hole 411 is provided on one side of the fixing plate 41 away from the connection plate 3. The gasket 331 is used to increase the contact area after the snap fastener 33 is installed, reduce the contact surface between the connection plate 3 and the wheel frame 41, and increase the mobility of the snap fastener 33. In other embodiments, the protrusion 34 can be provided on the wheel frame 4 and pass through the connection plate 3.

[0029] Preferably, a clamping block 22 is provided on the inner ring wall of the bearing 2, and a mounting block 31 is provided on the end of the connecting plate 3 away from the protrusion 34. The mounting block 31 is embedded in the inner ring of the bearing 2, and the clamping block 22 is clamped with the mounting block 31. An extension ring 21 is connected to the side of the inner ring of the bearing 2 close to the connecting plate 3. The extension ring 21 is used to extend the length of the inner ring of the bearing 2, and the extension ring 21 is used for the mounting block 31 to be embedded, thereby increasing the distance between the connecting plate 3 and the bearing 2 and the fixed seat 1, preventing the connecting plate 3 from rubbing against the fixed seat 1 when rotating, affecting the durability of the connecting plate 3 and the fixed seat 1, and making the steering more flexible. In this embodiment, the inner ring of the bearing 2 and the extension ring 21 are integrally formed or welded. The mounting block 31 is cylindrical, and the diameter of the mounting block 31 is slightly smaller than the diameter of the inner ring of the bearing 2. The clamping portion of the clamping block 22 can extend or retract on the inner ring wall of the bearing 2 relative to the center direction of the bearing 2. The clamping block 22 is fixedly connected to the screw, and the screw is threadedly assembled with the extension ring 21. The screw head of the screw is arranged on the outer wall of the extension ring 21. The height of the clamping portion protruding from the inner ring wall of the bearing 2 can be adjusted by rotating the screw head, thereby realizing the clamping assembly of the mounting block 31.

[0030] Preferably, the side plate 42 is provided with two pieces and is vertically connected to the fixing plate 41. The two side plates 42 are provided with third connection holes 421. A wheel axle 45 is provided between the two third connection holes 421. The fastener 44 passes through the wheel axle 45 and the two third connection holes 421, thereby realizing the detachable assembly of the wheel axle 45. The wheel body 5 is sleeved on the wheel axle 45. The wheel axle 45 allows the wheel body 5 to rotate relative to the fastener 44, so that the wheel body 5 can roll. In this embodiment, the fastener 44 is a bolt.

[0031] Note: Non-rotatable content includes: the connection mode in which two structural members are restricted to move in a local area (latch 33) and do not rotate around each other, that is, the two connected structural members cannot rotate freely outside the restricted area, and cannot complete a circular rotation around a point, but the two structural members can rotate around other parts. Obviously, if there are two or more latches on two components, they can only move in a local restricted area, so they are non-rotatable latches. Figure 2 The projection 34 in the bearing has the same function as the snap 33, and is also a snap in essence in terms of force relationship. Its point of action is at the contact point with the wheel frame 4, and it also exerts torque on the wheel frame 4. In addition, the snap layout is equidistant relative to the vertical center line of the bearing 2, otherwise it cannot go straight (because of the eccentric force).

[0032] The working principle of the present invention is roughly as follows: a mounting groove 11 is provided on the fixed seat 1, the bearing 2 is arranged in the mounting groove 11, the outer ring of the bearing 2 is connected to the fixed seat 1, the outer ring of the bearing 2 is fixed to the fixed seat 1, the inner ring of the bearing 2 can rotate relative to the fixed seat 1, the wheel frame 4 is connected to the inner ring of the bearing 2, so that the wheel frame 4 can rotate relative to the fixed seat 1, thereby realizing the steering function of the device, the wheel body 5 is rotatably arranged on the wheel frame 4, the steering axis of the wheel body 5 coincides with the axis of the bearing 2, a part of the connecting component is arranged on the wheel frame, and the other part is arranged on the bearing 2, the axis of the connecting part between the two parts is eccentric to the axis of the bearing 2, the connecting part is a loose buckle 33, and the loose buckle 33 is provided with no less than two and the eccentricity cannot be rotatable, and the loose buckle 33 is loose The resultant force formed by the steering mechanism when turning generates torque on the wheel frame 4 and the wheel body 5. When the wheel body 5 turns, the wheel frame 4 rotates horizontally through the connected bearing 2, thereby realizing horizontal 360-degree steering of the wheel body 5. The steering mechanism arranged in this way effectively solves the problem that the existing steering wheel deviates from the steering axis centerline of the wheel axle 45 of the wheel in the spatial structure by the steering bearing 2, thereby obtaining torque to realize steering movement, and the overall center of gravity of the steering wheel frame 4 relative to the steering axis centerline of the wheel axle 45 is unstable and the steering space is large. It has the advantages of being able to make the steering axis centerline of the wheel axle 45 and the rotating axis centerline of the steering bearing 2 tend to rotate coaxially, realizing steering movement at any angle, and having a stable center of gravity and a small steering space during rotation.

[0033] The above is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A non-rotatable eccentric snap-fit ​​steering mechanism, characterized in that: include: A fixing seat (1), wherein a mounting groove (11) is provided on the fixing seat (1); A bearing (2), the bearing (2) being arranged in the mounting groove (11), and a rotating portion on one side of the bearing (2) being connected to the fixed seat (1); A wheel frame (4), the wheel frame (4) being connected to the rotating part on the other side of the bearing (2); A wheel body (5), wherein the wheel body (5) is rotatably arranged on the wheel frame (4), and the steering axis centerline of the wheel body (5) coincides with the axis centerline of the bearing (2); and, A connecting assembly, wherein a portion of the connecting assembly is disposed on the wheel frame (4), and another portion of the connecting assembly is disposed on the bearing (2), and an axis centerline of a connecting portion between the two portions is eccentric to an axis centerline of the bearing (2); The connecting part is a snap button (33), and the snap buttons (33) are provided with no less than two and are eccentric and non-rotatable. When the snap buttons (33) are loosened or tightened, the resultant force generated when the steering mechanism turns can generate torque on the wheel frame (4) and the wheel body (5); The connection component comprises: A connecting plate (3), the connecting plate (3) being fixedly assembled with the inner ring of the bearing (2), the connecting plate (3) being provided with a first connecting hole (32), the wheel frame (4) being provided with a second connecting hole (411) corresponding to the first connecting hole (32), and the snap button (33) being passed through the first connecting hole (32) and the second connecting hole (411); a convex block (34), the convex block (34) being arranged on a side of the connecting plate (3) away from the bearing (2), the convex block (34) passing through the wheel frame (4); and, The latch (43) is provided with a locking hole (341) perpendicular to the installation direction of the lug (34) on the lug (34); the latch (43) is provided with the locking hole (341) for detachably assembling the connecting plate (3) and the wheel frame (4).

2. The non-rotatable eccentric snap-fit ​​steering mechanism according to claim 1, characterized in that: The snap fastener (33) is a non-rigid connecting piece.

3. The non-rotatable eccentric snap-fit ​​steering mechanism according to claim 1, characterized in that: A clamping block (22) is provided on the inner ring wall of the bearing (2), and a mounting block (31) is provided on one end of the connecting plate (3) away from the protrusion (34); the mounting block (31) is embedded in the inner ring of the bearing (2), and the clamping block (22) is clamped to the mounting block (31).

4. The non-rotatable eccentric snap-fit ​​steering mechanism according to claim 3, characterized in that: An extension ring (21) is connected to a side of the inner ring of the bearing (2) close to the connecting plate (3).

5. The non-rotatable eccentric snap-fit ​​steering mechanism according to claim 4, characterized in that: The inner ring of the bearing (2) and the extension ring (21) are integrally formed or welded.

6. The non-rotatable eccentric snap-fit ​​steering mechanism according to claim 1, characterized in that: The fixing seat (1) is provided with a mounting hole (12) for assembling with external equipment.

7. The non-rotatable eccentric snap-fit ​​steering mechanism according to claim 6, characterized in that: The fixing seat (1) is arranged in a square shape.

8. The non-rotatable eccentric snap-fit ​​steering mechanism according to claim 7, characterized in that: There are four mounting holes (12), which are respectively arranged at the four corners of the fixing seat (1).

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