Quick-release trolley swivel caster

Abstract

The utility model provides a kind of quick-release trolley movable caster, including rotating wheel assembly, rotating wheel assembly is equipped with rotating shaft, rotating shaft is equipped with support sleeve, the lower section of support sleeve is equipped with the axle hole matched with rotating shaft, the upper section of support sleeve is connected with the press cover of axial activity, reset spring is equipped between support sleeve and press cover, the side wall of rotating shaft is equipped with limit ring groove, limit ring groove is equipped with limit cross bar, the both ends of limit cross bar are equipped with horizontally arranged long strip sliding hole corresponding to support sleeve, the both ends of limit cross bar are inserted into long strip sliding hole and inclined sliding hole corresponding to the side wall of press cover, inclined sliding hole is arranged from inside to outside, and limit cross bar is inserted into long strip sliding hole and inclined sliding hole, support sleeve is equipped with the fixed sleeve fixed with vehicle frame. The utility model can realize the disassembly of rotating wheel assembly by press cover, and can realize installation by inserting rotating shaft into support sleeve, so it is convenient and fast, and small parts can be separated without being lost, so as to avoid affecting use.

Description

Technical Field

[0001] This utility model belongs to the field of trolleys, and specifically relates to a quick-release trolley caster. Background Technology

[0002] Strollers are widely used in the pet industry. For maneuverability, strollers are equipped with swivel casters at the front, typically one or two. Since pet strollers are frequently taken outdoors, especially to grassy areas, the swivel casters are generally larger for easier movement on grass. Due to their larger size, the casters need to be removed during transport, such as packaging for shipment or loading into a vehicle. Currently, swivel casters generally consist of a swivel wheel assembly with a rotating axle. A retaining sleeve is located on the stroller. The rotating axle passes through one end of the retaining sleeve and extends out the other, then is locked in place with a pin to prevent it from detaching. The axle is detached from the retaining sleeve by inserting and removing the pin. This process is cumbersome, and the pin, being a small, detachable part, is frequently lost, affecting usability. Utility Model Content

[0003] To overcome the shortcomings and problems of existing technologies, this utility model provides a quick-release trolley caster. The rotating wheel assembly can be disassembled by pressing the cover, and the rotating shaft can be directly inserted into the support sleeve for installation. It is convenient and quick to use, and does not require the use of detachable small parts, thus avoiding the loss of parts that affect use.

[0004] This utility model is achieved through the following technical solution:

[0005] A quick-release trolley caster includes a rotating wheel assembly with a rotating shaft on it. A support sleeve is fitted onto the rotating shaft. The lower section of the support sleeve has a shaft hole that matches the rotating shaft. The upper section of the support sleeve is connected to an axially movable press sleeve cover. A return spring is provided between the support sleeve and the press sleeve cover. A limiting ring groove is provided on the side wall of the rotating shaft. A limiting crossbar is provided in the limiting ring groove. The support sleeve has horizontally arranged elongated sliding holes at both ends corresponding to the limiting crossbar. The side wall of the press sleeve cover has oblique sliding holes at both ends corresponding to the limiting crossbar. The oblique sliding holes are arranged obliquely upward from the inside to the outside. Both ends of the limiting crossbar are inserted into the elongated sliding holes and the oblique sliding holes. A fixing sleeve that is fixed to the trolley frame is fitted over the support sleeve.

[0006] The limiting crossbars are provided in two symmetrical arrangements on both sides of the rotating shaft. The support sleeve has two pairs of elongated sliding holes corresponding to the two limiting crossbars, and the pressing sleeve cover has two pairs of oblique sliding holes corresponding to the two limiting crossbars.

[0007] The upper section of the support sleeve is provided with an inner sleeve and an outer sleeve. The elongated sliding hole is provided on the inner sleeve, and the outer sleeve is provided with an insertion hole for inserting a limiting crossbar corresponding to the elongated sliding hole.

[0008] The spring is located between the inner sleeve and the outer sleeve, and the pressing cover is inserted into the gap between the inner sleeve and the outer sleeve.

[0009] The lower end of the fixed sleeve is provided with a rolling bearing, the inner ring of which is fitted onto the rotating shaft, and a retaining spring is also provided inside the fixed sleeve to abut against the end face of the rolling bearing.

[0010] The top of the fixing sleeve is provided with a limiting protrusion, which abuts against the top edge of the pressing sleeve cover.

[0011] The rotating wheel assembly includes a wheel body connected to a support frame, and a rotating shaft is located on the top surface of the support frame.

[0012] When the press cover of this utility model is pressed down, due to the characteristics of the oblique sliding hole, the limiting crossbar moves laterally along the outer side of the long sliding hole, thereby causing the limiting crossbar to disengage from the limiting ring groove. As a result, the limiting of the rotating shaft is released, and the rotating shaft can be pulled out axially, allowing the rotating wheel assembly to disengage and complete the disassembly. During installation, the rotating shaft can be directly inserted into the support sleeve, which is convenient and quick to use, and there is no need to use detachable small parts, avoiding the loss of parts that affect the use. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 This is an exploded structural diagram of the components of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the limiting crossbar in this utility model;

[0016] Figure 4 This is a schematic diagram of the connection structure between the limiting crossbar and the elongated sliding hole in this utility model;

[0017] Figure 5 This is a schematic diagram of the connection structure between the limiting crossbar and the oblique sliding hole in this utility model;

[0018] Figure 6 This is a schematic diagram of the limiting crossbar in this utility model;

[0019] Figure 7 This is a schematic diagram of the support sleeve in this utility model;

[0020] Figure 8 This is a schematic diagram of the connection structure of the fixed sleeve, rolling bearing and snap ring in this utility model;

[0021] Figure 9 This is a schematic diagram of the structure of the present invention mounted on the vehicle frame.

[0022] In the diagram: 1-Rotating wheel assembly, 11-Wheel body, 12-Support frame, 101-Rotating shaft, 1011-Limiting ring groove, 2-Support sleeve, 21-Shaft hole, 22-Inner sleeve, 23-Outer sleeve, 201-Long strip sliding hole, 202-Insertion hole, 3-Pressing sleeve cover, 301-Slanted sliding groove, 4-Spring, 5-Limiting crossbar, 6-Fixing sleeve, 61-Limiting flange, 7-Rolling bearing, 8-Snap ring, 9-Frame. Detailed Implementation

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-5 As shown, a quick-release trolley caster includes a rotating wheel assembly 1 with a rotating shaft 101 on it, enabling the rotating wheel assembly 1 to rotate in a planar direction via the rotating shaft 101. The rotating wheel assembly 1 includes a wheel body 11, which is connected to a support frame 12, and the rotating shaft 101 is located on the top surface of the support frame 12.

[0025] A support sleeve 2 is fitted onto the rotating shaft 101. The lower section of the support sleeve 2 has a shaft hole 21 that matches the rotating shaft 101. The upper section of the support sleeve 2 is connected to an axially movable pressing sleeve cover 3. A return spring 4 is provided between the support sleeve 2 and the pressing sleeve cover 3. Pressing the pressing sleeve cover 3 causes it to move axially, and the return spring 4 causes the pressing sleeve cover 3 to spring back to its original position. The upper section of the support sleeve 2 has an inner sleeve portion 22 and an outer sleeve portion 23. The spring 4 is disposed between the inner sleeve portion 22 and the outer sleeve portion 23. The pressing sleeve cover 3 is inserted into the gap between the inner sleeve portion 22 and the outer sleeve portion 23. This structure facilitates the installation of the pressing sleeve cover 3 and the spring 4, as well as the pressing of the pressing sleeve cover 3.

[0026] The side wall of the rotating shaft 101 is provided with a limiting annular groove 1011, and a limiting crossbar 5 is provided in the limiting annular groove 1011. The support sleeve 2 is provided with horizontally arranged elongated sliding holes 201 corresponding to both ends of the limiting crossbar 5. The side wall of the pressing sleeve cover 3 is provided with oblique sliding holes 301 corresponding to both ends of the limiting crossbar 5. The oblique sliding holes 301 are arranged obliquely upward from the inside to the outside. Both ends of the limiting crossbar 5 are inserted into the elongated sliding holes 201 and the oblique sliding holes 301. The elongated sliding holes 201 are provided on the inner sleeve 22, and the outer sleeve 23 is provided with insertion holes 202 for the limiting crossbar 5 to be inserted corresponding to the elongated sliding holes 201. This structure facilitates the installation of the limiting crossbar 5 during assembly. Under the action of spring 4, the pressing sleeve cover 3 is in the raised state. At this time, the limiting crossbar 5 is at the lower end of the oblique sliding hole 301, and the limiting crossbar 5 is stuck in the limiting ring groove 1011. The axial position of the rotating shaft 101 is restricted, and the rotating wheel assembly 1 cannot be released. Pressing the pressing sleeve cover 3 causes it to descend. The oblique sliding hole 301 causes the limiting crossbar 5 to move laterally along the outer side of the elongated sliding hole 201, thereby causing the limiting crossbar 5 to disengage from the limiting ring groove 1011. Therefore, the limiting of the rotating shaft 101 is released, and the rotating shaft 101 can be pulled out axially, allowing the rotating wheel assembly 1 to disengage and complete the disassembly. In order to make the limiting of the rotating shaft 101 more reliable and the force more balanced, there are two limiting crossbars 5, which are symmetrically arranged on both sides of the rotating shaft 101. The support sleeve 2 has two pairs of elongated sliding holes 201 corresponding to the two limiting crossbars 5, and the pressing sleeve cover 3 has two pairs of oblique sliding holes 301 corresponding to the two limiting crossbars 5. For ease of installation, the top of the rotating shaft 101 is conical or hemispherical. During installation, as the rotating shaft 101 is inserted, the top of the rotating shaft 101 presses against the limiting crossbar 5, causing the limiting crossbar 5 to move outward. When the rotating shaft 101 is fully inserted, the limiting crossbar 5 is engaged in the limiting ring groove 1011, completing the installation.

[0027] The support sleeve 2 is covered with a fixing sleeve 6 that is fixed to the frame, facilitating connection with the frame. A rolling bearing 7 is located at the lower end of the fixing sleeve 6, with its inner ring fitted onto the rotating shaft 101. A retaining spring 8 is also provided inside the fixing sleeve 6, abutting against the end face of the rolling bearing 7. The rolling bearing 7 ensures smoother rotation of the rotating shaft 101, and the retaining spring 8 secures the rolling bearing 7, preventing it from loosening. A limiting flange 61 is located at the top of the fixing sleeve 6, abutting against the top edge of the pressing sleeve cover 3, thus limiting the upward position of the pressing sleeve cover 3.

[0028] The working process of this utility model is as follows: Figure 9The image shows the assembly on the frame 9. During assembly, first insert the spring into the support sleeve 2, then insert the pressing sleeve cover 3 into the support sleeve 2, and then insert the limiting crossbar 5 through the insertion hole 202, ensuring both ends of the limiting crossbar 5 are inserted into the elongated sliding hole 201 and the oblique sliding hole 301. Insert the assembled component into the fixing sleeve 6, then install the rolling bearing 7, and finally secure it with the snap ring 8. When installing the rotating wheel assembly 1, insert the rotating shaft 101 into the shaft hole 21 through the rolling bearing 7. During insertion, the top of the rotating shaft 101 presses against the limiting crossbar. 5. This causes the limiting crossbar 5 to move outward. When the rotating shaft 101 is fully inserted, the limiting crossbar 5 is engaged in the limiting ring groove 1011, completing the installation. When it is necessary to disassemble the rotating wheel assembly 1, press the pressing sleeve cover 3. The pressing sleeve cover 3 descends, and the oblique sliding hole 301 causes the limiting crossbar 5 to move laterally along the outer side of the long sliding hole 201, thereby causing the limiting crossbar 5 to disengage from the limiting ring groove 1011. As a result, the limiting of the rotating shaft 101 is released, and the rotating shaft 101 can be pulled out axially, causing the rotating wheel assembly 1 to disengage, completing the disassembly.

[0029] The above embodiments are preferred implementations of this utility model and are not intended to limit this utility model. Any obvious substitutions are within the protection scope of this utility model without departing from its inventive concept.

Claims

1. A quick-release trolley caster, comprising a rotating wheel assembly (1), wherein the rotating wheel assembly is provided with a rotating shaft (101), characterized in that: A support sleeve (2) is fitted on the rotating shaft. The lower section of the support sleeve is provided with a shaft hole (21) that matches the rotating shaft. The upper section of the support sleeve is connected to an axially movable pressing sleeve cover (3). A return spring (4) is provided between the support sleeve and the pressing sleeve cover. A limiting ring groove (1011) is provided on the side wall of the rotating shaft. A limiting crossbar (5) is provided in the limiting ring groove. The support sleeve is provided with horizontally arranged elongated sliding holes (201) at both ends of the limiting crossbar. The side wall of the pressing sleeve cover is provided with oblique sliding holes (301) at both ends of the limiting crossbar. The oblique sliding holes are arranged obliquely from the inside to the outside. Both ends of the limiting crossbar are inserted into the elongated sliding holes and the oblique sliding holes. A fixing sleeve (6) that is fixed to the frame is fitted on the support sleeve.

2. The quick-release trolley caster according to claim 1, characterized in that: The limiting crossbar (5) has two branches, which are symmetrically arranged on both sides of the rotating shaft (101). The support sleeve has two pairs of long sliding holes (201) corresponding to the two limiting crossbars, and the pressing sleeve cover has two pairs of oblique sliding holes (301) corresponding to the two limiting crossbars.

3. The quick-release trolley caster according to claim 2, characterized in that: The upper section of the support sleeve (2) is provided with an inner sleeve (22) and an outer sleeve (23). The elongated sliding hole (201) is provided on the inner sleeve, and the outer sleeve is provided with an insertion hole (202) for inserting the limiting crossbar corresponding to the elongated sliding hole.

4. The quick-release trolley caster according to claim 3, characterized in that: The spring (4) is located between the inner sleeve and the outer sleeve (23), and the pressing cover (3) is inserted into the gap between the inner sleeve and the outer sleeve.

5. The quick-release trolley caster according to any one of claims 1-4, characterized in that: The lower end of the fixed sleeve (6) is provided with a rolling bearing (7), the inner ring of the rolling bearing is fitted on the rotating shaft (101), and the fixed sleeve is also provided with a retaining ring (8) that abuts against the end face of the rolling bearing.

6. The quick-release trolley caster according to claim 5, characterized in that: The top of the fixed sleeve (6) is provided with a limiting protrusion (61), which abuts against the top edge of the pressing sleeve cover (3).

7. The quick-release trolley caster according to claim 1, characterized in that: The rotating wheel assembly (1) includes a wheel body (11), a support frame (12) connected to the wheel body, and a rotating shaft (101) disposed on the top surface of the support frame.

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