Self-locking universal wheel

Abstract

The utility model relates to the technical field of universal wheels, in particular to a self-locking universal wheel. A self-locking universal wheel comprises an idler wheel, an idler wheel support and a locking structure limiting rotation of the idler wheel, and the locking structure comprises a center shaft body, an insertion lantern ring and a positioning block. The central shaft body is arranged perpendicular to the advancing direction of the roller, and an insertion lantern ring and a positioning block are arranged on the central shaft body; the inserting lantern ring is linked with the central shaft body and is clamped with the slot on the rotating disc through the limiting plate; the positioning block is arranged at the top of the inserting lantern ring, an auxiliary sliding rod is arranged in the moving direction of the shaft body and arranged between the positioning block and the limiting plate, and a reset spring is connected between the positioning block and the limiting plate in a sleeved mode. According to the utility model, an insertion type locking structure is adopted, and horizontal rotation and front-back movement of the universal wheels are locked simultaneously by utilizing up-down movement of the central shaft body, namely the universal wheels are completely locked to achieve a fixing effect; the structure is simple and reliable, and a new locking mode is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of universal wheels, and more specifically to a self-locking universal wheel. Background Art

[0002] Casters include movable casters and fixed casters. Fixed casters have no rotating structure and cannot rotate along the vertical axis perpendicular to the ground, while universal casters are so-called movable casters, and their structure allows 360-degree horizontal rotation. Universal casters are widely used in many industries and 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.

[0003] The existing universal wheel brake requires hand brake or foot brake to brake. What is needed in the market now is a universal wheel that stops as soon as the hand is released. If any accident occurs, as long as the hand is released, the cart can stop moving immediately, ensuring the safety of the vehicle and personnel and avoiding accidents.

[0004] Therefore, there is an urgent need to provide a novel self-locking universal wheel that is convenient and quick to lock. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model aims to provide a push-type self-locking universal wheel with a self-locking function.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions, which mainly include: a self-locking universal wheel, including a roller, a roller bracket and a locking structure for limiting the rotation of the roller, the locking structure is composed of an insertion part and a limiting part, the insertion part and the limiting part are inserted and engaged for braking, and the horizontal rotation of the roller is locked; the locking structure includes a central shaft, an insertion ring, and a positioning block;

[0007] The central axis is arranged perpendicular to the direction of travel of the roller, and an insertion ring and a positioning block are arranged on the central axis;

[0008] The insert ring is linked with the central shaft body and is engaged with the slot on the rotating disk through the limit plate;

[0009] The positioning block is arranged at the top of the insertion collar, an auxiliary sliding rod is arranged along the movement direction of the shaft body, the sliding rod is arranged between the positioning block and the limiting plate, and a reset spring is sleeved therebetween.

[0010] Preferably, the self-locking universal wheel also includes a roller rotation locking structure, which includes a roller, a roller bracket, and a brake block; the roller is installed in the middle of the roller bracket through a rotating shaft, and the roller rotates in a direction vertical to the rotating shaft; upper and lower sliding limit grooves are provided on the side of the roller bracket for installing the front end sliding rod of the brake block; a brake block adapted to the roller is provided at the rear end of the brake block, and the brake block is pressed down to frictionally brake the roller.

[0011] Preferably, the bottom end of the central axis is connected to the brake block by bolt limitering, and the movement of the central axis drives the brake block to move in conjunction.

[0012] Preferably, the roller brackets are arranged on both sides of the rotating disk and are symmetrically arranged; and the horizontal rotation is achieved by arranging a steel ball rolling groove between the rotating disk and the limiting plate.

[0013] Preferably, the limiting plate is provided with a plurality of limiting slots, and the limiting slots are provided corresponding to the inserting portion on the inserting ring and corresponding to the slots on the rotating disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model 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 in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a cross-sectional schematic diagram of the utility model.

[0017] Figure 3 Schematic diagram of the central axis connection structure.

[0018] Figure 4 It is a schematic diagram of the back side of the limiting plate in the utility model.

[0019] Figure 5 The utility model is a schematic diagram of the structure applied to the universal wheel.

[0020] Figure 6 It is a partial schematic diagram of the connection between the pull rod and the universal wheel in the utility model.

[0021] Figure 7 The utility model is a connection diagram of the pull rod, the grip rod and the universal wheel.

[0022] Figure 8It is a connection diagram of the central axis, the inserting ring, the limiting plate and the rotating disk in the utility model (part of the structure is omitted).

[0023] Explanation of the reference numerals: 1-roller, 2-rotating disk, 3-roller bracket, 4-axis, 5-sliding limit groove, 6-sliding rod, 7-brake block, 8-limiting plate, 9-steel ball rolling groove, 10-steel ball, 11-insertion part, 12-central axis, 13-insertion ring, 14-positioning block, 15-auxiliary sliding rod, 16-reset spring, 17-limiting slot, 18-column, 19-pull rod, 20-grip rod, 21-brake disc. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1

[0026] The existing universal wheels have a range of motion in two directions, one is horizontal rotation, which makes the rollers easy to turn and is convenient for dealing with various usage situations; the other is the most basic forward and backward movement; in order to lock the movement in two directions at the same time, the existing universal wheel brakes require hand brakes or foot brakes to brake, and cannot achieve the effect of stopping when the hands are released. In any accident, as long as the hands are loose, the cart cannot stop moving immediately, which is prone to emergencies and poses a safety hazard.

[0027] Therefore, the applicant designed an inserted universal wheel self-locking structure. The universal wheel is designed mainly to stop the movement of the cart immediately when an accident occurs in an emergency situation and the user loosens his hands. The locking structure is simpler and faster, and can be locked with one button.

[0028] The whole can be divided into a roller part, a rotating part and a locking structure part; the roller is of existing design, the roller 1 is installed at the bottom of the rotating disk 2, the rotating disk 2 is the mounting bracket of the roller 1, roller brackets 3 are arranged on both sides, the roller 1 is installed on the roller bracket 3 by using the shaft body 4, and the side of the roller bracket 3 is provided with an upper and lower sliding limit groove 5 for installing the front end sliding rod 6 of the brake block 7; the rear end of the brake block 7 is provided with a brake block adapted to the roller 1, and the brake block is pressed down to frictionally brake with the roller 1; the brake block is provided with a groove adapted to the roller 1, which fits the roller 1 more closely and has a better braking effect; the above is a braking structure for the rotation of the roller 1, and the friction braking is performed by the pressed down brake block and the roller 1;

[0029] In the rotating part, a steel ball rolling groove 9 is opened between the rotating disk 2 and the limiting plate 8, and the upper and lower grooves are correspondingly arranged, and a steel ball 10 is placed inside. By utilizing the rolling characteristics of the steel ball 10, the limiting plate 8 and the rotating disk 2 can rotate relative to each other, and the rotating disk 2 can also drive the roller 1 to rotate at the same time, so as to achieve the function of turning;

[0030] The locking part, the forward braking of the universal wheel has been described above, and the rotation locking will be described below. The locking structure of the present application is composed of an insertion part and a limiting part. The insertion part 11 and the limiting part are inserted and engaged for braking to lock the horizontal rotation of the roller;

[0031] The specific structure is as follows: the locking structure includes a central shaft 12, an inserting collar 13, and a positioning block 14;

[0032] The central shaft body 12 is arranged perpendicularly to the direction of travel of the roller 1, and an insertion collar 13 and a positioning block 14 are arranged on the central shaft body 12; the bottom end of the central shaft body 12 is connected to the brake block by bolt limiter, and the movement of the central shaft body 12 drives the brake block to rotate 360 ​​degrees around the central shaft body 12; the rotation and movement can be controlled at the same time, the locking is more convenient, and the response is faster;

[0033] The inserting collar 13 is linked with the central shaft body 12, moves with the shaft body in the vertical direction, and is inserted into the corresponding slot on the rotating disk through the limiting plate 8 to lock the horizontal movement; the inserting collar 13 is fixedly connected with the central shaft body 12 by a positioning pin;

[0034] A circular brake disc 21 is embedded inside the rotating disc 2. A plurality of slots for limiting are arranged along the circumference of the brake disc 21. In order to adapt to the limiting plate 8, the number of slots on the brake disc 21 is obviously more than the number of limiting slots 17 on the limiting plate. The art can select a suitable number of slots according to the usage to achieve a satisfactory locking effect (see the specific structure). Figure 8 );

[0035] The positioning block 14 is arranged at the top of the insertion ring 13, and an auxiliary sliding rod 15 is arranged along the movement direction of the shaft body. The auxiliary sliding rod 15 is arranged between the positioning block 14 and the limit plate 8, and a return spring 16 is sleeved therebetween;

[0036] The limiting plate 8 is provided with a plurality of limiting slots 17 , and the limiting slots 17 are provided corresponding to the inserting portion 11 on the inserting ring 13 ; the shape of the inserting portion 11 can be set according to actual conditions.

[0037] Embodiment 2

[0038] In conjunction with the instruction manual Figure 5-7, which is a specific application mode of the present invention. The universal wheel of the above structure is installed at the rear end of the cart. The front wheel can be a common universal wheel or a variant of the universal wheel mentioned in the present invention. It is adaptively installed. Two columns 18 are arranged on the cargo end surface of the cart. A pull rod 19 is arranged inside the column 18. A grip 20 that rotates along the pin is installed on the top of the column 18. One end of the pull rod 19 is vertically arranged with the grip 20, and the other end is connected to the central axis 12 through a pin. The grip 20 can control the up and down movement of the central axis 12. When the user is pushing the cart, he grabs the two grips 20 with his hands at the same time. The uppermost grip 20 is The end grip 20 can move along the pin shaft, that is, the gripping method is that the user presses the uppermost grip 20 downward, the grip 20 drives the pull rod 19 upward, and at the same time links the central axis 12 to move upward, releases the locking structure of the roller 1, and the universal wheel can move freely. When the user releases his hand, the return spring 16 of the central axis 12 rebounds under the action of elastic force, locks the roller 1, and achieves the effect of stopping when the hand is released, preventing the cart from being out of control and causing an accident in an unexpected situation. The cart must move under human control, and it will stop when the hand is released. In special circumstances, it can effectively avoid accidents caused by human negligence and the sliding of the cart in unexpected circumstances.

[0039] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-locking universal wheel, comprising a roller, a roller bracket and a locking structure for limiting the rotation of the roller, characterized in that: The locking structure is composed of an inserting part and a limiting part. The inserting part and the limiting part are inserted and engaged to brake, thereby locking the horizontal rotation of the roller. The locking structure includes a central shaft, an inserting ring, and a positioning block. The central axis is arranged perpendicular to the direction of travel of the roller, and an insertion ring and a positioning block are arranged on the central axis; The insert ring is linked with the central shaft body and is engaged with the slot on the rotating disk through the limit plate; The positioning block is arranged at the top of the insertion ring, an auxiliary sliding rod is arranged along the movement direction of the shaft body, the sliding rod is arranged between the positioning block and the limiting plate, and a return spring is sleeved therebetween.

2. The self-locking universal wheel according to claim 1, characterized in that: The self-locking universal wheel also includes a roller rotation locking structure, which includes a roller, a roller bracket, and a brake block; the roller is installed in the middle of the roller bracket through a rotating shaft, and the roller rotates in a direction vertical to the rotating shaft; upper and lower sliding limit grooves are provided on the side of the roller bracket for installing the front end sliding rod of the brake block; a brake block adapted to the roller is provided at the rear end of the brake block, and the brake block is pressed down to perform friction braking with the roller.

3. The self-locking universal wheel according to claim 1, characterized in that: The bottom end of the central shaft body is connected to the brake block by bolt limiter, and the movement of the central shaft body drives the brake block to move in linkage.

4. The self-locking universal wheel according to claim 2, characterized in that: The roller brackets are arranged on both sides of the rotating disk and are symmetrically arranged; a steel ball rolling groove is arranged between the rotating disk and the limiting plate to complete the horizontal rotation.

5. The self-locking universal wheel according to claim 1, characterized in that: The limiting plate is provided with a plurality of limiting slots, and the limiting slots are arranged correspondingly to the inserting portion on the inserting ring, and are also arranged correspondingly to the slots on the rotating disk.

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