Brake structure of trolley and trolley

Abstract

The brake structure comprises a wheel seat, a first brake part, a first brake and wheels, and the wheel seat comprises a fixed seat and a movable seat which can relatively rotate around an axis; the disc is arranged on the movable seat and can synchronously rotate around the axis with the movable seat; the disc brake comprises a movable brake arm, and the brake arm has a restraining state in which the brake arm is in contact with the disc to limit rotation of the disc and a releasing state in which the brake arm is separated from the disc; the wheels are detachably connected with the wheel seats in a pivoted mode and clamped with the movable seats. The trolley correspondingly provided with the brake structure can be normally stopped, binding force is applied to the first brake part through the first brake in emergency so as to decelerate or brake in emergency, daily use is facilitated, and the use safety is improved. And during assembly, after the fixed seat, the movable seat and the wheels are coaxially connected, the assembly is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of brake equipment, and in particular to a brake structure of a trolley and the trolley. Background Art

[0002] Existing trolleys are only equipped with parking mechanisms. For example, the patent document with the announcement number CN218141739U discloses a brake mechanism and a child carrier. When the vehicle is stationary, the user usually stops the rear wheels by stepping on the pedal. However, when the trolley is moving, emergency parking is often required in the face of some emergencies, but the existing parking mechanism cannot meet daily use. Moreover, the installation of such a structure is relatively complicated, for example, a brake pin, a spring and a pedal need to be installed in the wheel seat. Utility Model Content

[0003] The present application provides a brake structure for a trolley, which is convenient for assembly and daily use.

[0004] The present application provides a brake structure for a trolley, comprising:

[0005] The wheel seat comprises a fixed seat and a movable seat which can rotate relative to each other around an axis;

[0006] A wheel, detachably pivotally connected to the wheel seat and engaged with the movable seat;

[0007] A first braking part, which is disposed on the movable seat and rotates synchronously with the movable seat around the axis;

[0008] The first brake can act on the braking part to limit the rotation of the movable seat.

[0009] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0010] Optionally, the first brake interacts with the first braking portion through friction.

[0011] Optionally, the first brake part is a disc, and the first brake comprises a movable brake arm, and the brake arm has a restraining state of contacting the disc to restrict the rotation of the disc, and a releasing state of being separated from the disc;

[0012] The movable seat comprises an outer portion and an inner portion connected by a fastener, and the disc is clamped and fixed between the inner portion and the outer portion.

[0013] Optionally, there are two brake arms, which are arranged on both sides of the disc.

[0014] Optionally, the inner portion is plug-fitted to the fixing seat, and a bearing is provided between the two.

[0015] Optionally, the wheel and the movable seat have a first surface and a second surface opposite to each other, and a locking mechanism is provided between the first surface and the second surface.

[0016] Optionally, a second braking portion is provided on the movable seat, and a second brake is movably provided in the fixed seat, and the second brake has a locking state in which the second braking portion acts on the movable seat to prevent the movable seat from rotating, and a releasing state in which the second braking portion is disengaged.

[0017] The present application also provides a trolley, comprising any of the above-mentioned brake structures.

[0018] Optionally, the wheel seats are arranged in pairs.

[0019] Optionally, the trolley includes a handle, and a first operating member for driving the first brake is provided on the handle.

[0020] The brake structure of the trolley of the present application and the trolley equipped with the brake structure can be parked normally, and in an emergency, a restraining force is applied to the first brake part by the first brake to decelerate or perform emergency braking, which is convenient for daily use and improves safety of use. The wheel seat and the wheel are coaxially arranged, which is more convenient for assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a trolley according to an embodiment of the present application;

[0022] Figure 2 for Figure 1 An exploded view of the brake structure of the middle cart;

[0023] Figure 3 for Figure 2 Exploded view from another perspective;

[0024] Figure 4 This is the exploded view of the movable seat 2;

[0025] Figure 5 for Figure 4 Exploded view from another perspective;

[0026] Figure 6 A cross-sectional view of a brake structure (brake pin in a released state) according to an embodiment of the present application;

[0027] Figure 7 A cross-sectional view of a brake structure (brake pin in a locked state) according to an embodiment of the present application;

[0028] Figure 8 This is a structural view of a trolley (without rear wheels) according to an embodiment of the present application;

[0029] Fig. 9 for Figure 8 Exploded view between the center cross member and the wheel seat.

[0030] The reference numerals in the figures are described as follows:

[0031] 1000, trolley;

[0032] 100, wheel seat; 101, axis; 102, connecting shaft; 103, snap ring; 110, fixed seat; 120, movable seat; 121, second braking part; 122, outer part; 123, inner part; 124, slot; 130, bearing;

[0033] 200, second brake;

[0034] 300, first brake part;

[0035] 400, first brake; 410, brake arm;

[0036] 500, wheel; 511, block; 520, rotating shaft;

[0037] 610, front tripod; 620, rear tripod; 621, transverse member; 622, driving unit; 623, operating unit; 624, crossbar; 625, connecting sleeve; 626, elastic member; 630, handle; 631, second operating member. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] In this application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] See also Figures 1 to 9 The present application provides a brake structure for a trolley. For a trolley 1000, it includes a tripod with the following wheel seat, and a handle for a user to push. The brake structure includes a wheel seat 100, a first braking part 300, a first brake 400 and a wheel 500. The wheel seat 100 includes a fixed seat 110 and a movable seat 120 that can rotate relative to each other around an axis 101.

[0043] The wheel 500 is detachably pivotally connected to the wheel seat 100 along the axis 101, and is engaged with the movable seat 120 to achieve synchronous rotation of the two. The first brake part 300 is provided on the movable seat 120 and rotates synchronously with the movable seat 120 around the axis 101. The first brake 400 can act on the brake part to limit the rotation of the movable seat 120, where "limit" is understood to reduce the rotation speed of the movable seat 120 and prevent the movable seat 120 from rotating (i.e., the rotation speed is 0). When the first brake 400 releases the action on the first brake part 300, the corresponding movable seat 120 is not constrained.

[0044] When a user pushes a trolley equipped with the brake mechanism of the present application and needs to slow down or stop in an emergency, an external force is applied to drive the first brake part to act on the first brake part, so that the rotation speed of the movable seat is reduced, and the trolley is decelerated or stopped accordingly. It is convenient for daily use and improves the safety of use. In addition, when assembling, after the fixed seat, the movable seat and the wheel are coaxially connected, the overall assembly is more convenient than the existing structure.

[0045] The first brake 400 and the first brake part 300 interact with each other through friction. For example, in the figure, the first brake part 300 is a disc, and the first brake 400 is a disc brake and includes a movable brake arm 410. The brake arm 410 has a restraining state of contacting the disc to restrict the rotation of the disc, and a releasing state of being separated from the disc. In the restraining state, based on the friction between the brake arm 410 and the disc, the speed of the disc can be limited or the rotation of the disc can be limited. The disc brake can adopt hydraulic or pneumatic braking.

[0046] The wheel 500 and the movable seat 120 have a first surface and a second surface relative to each other, and a snap-fit ​​mechanism is provided between the first surface and the second surface. After the wheel 500 is inserted and connected to the wheel seat 100 along the axis 101, the snap-fit ​​mechanisms snap-fit ​​each other to realize the synchronous rotation of the wheel 500 and the movable seat 120. The movable seat 120 includes an outer portion 122 and an inner portion 123 connected by fasteners, and the disc is clamped and fixed between the inner portion 123 and the outer portion 122. Specifically, the disc is provided with a through hole for the fastener to pass through, and one of the inner portion 123 and the outer portion 122 is threadedly connected to the fastener. The second surface is provided on the outer portion 122.

[0047] In one embodiment, the inner portion 123 is plugged into the fixed seat 110, and a bearing 130 is disposed between the two. The wheel seat 100 has a connecting shaft 102 with an axis 101, and the movable seat 120 is sleeved on the outer periphery of the connecting shaft 102. A snap ring 103 is disposed on the connecting shaft 102 to prevent the movable seat 120 from escaping from the wheel seat 100.

[0048] The engaging mechanism includes a slot 124 disposed on the outer portion 122 , a block 511 matched with the slot 124 is disposed on the wheel 500 , and a rotating shaft 520 inserted into the shaft hole of the connecting shaft 102 is disposed on the wheel 500 .

[0049] In one embodiment, there are two brake arms 410 disposed on both sides of the disc. In the restrained state, the two brake arms 410 contact the disc at the same time.

[0050] During actual assembly, the bearing 130 is first embedded in the inner portion 123 , and then the outer portion 122 and the disc are fixedly connected to the inner portion 123 by fasteners, and then embedded in the fixing seat 110 and the retaining ring 103 is used to resist the bearing 130 to remove it from the fixing seat 110 .

[0051] In a preferred embodiment, a second brake portion 121 is provided on the movable seat 120, and a second brake 200 is movably provided in the fixed seat 110. The second brake 200 has a locking state in which the second brake portion 121 acts to prevent the movable seat 120 from rotating, and a release state in which the second brake portion 121 is disengaged. The second brake 200 is a brake pin and is slidably installed in the fixed seat 110 along the axis 101. The second brake portion 121 is a plurality of brake holes arranged around the axis. In some embodiments, a first operating member that is linked to the brake pin is movably provided on the frame or the wheel seat, as shown in the following embodiments.

[0052] The present application also provides a trolley, comprising the brake structure of any of the above embodiments. In the figure, the trolley comprises a front foot frame 610, two rear foot frames 620, and a handle 630, wherein the rear foot frames 620 are provided with a wheel seat 100, and the two wheel seats 100 are symmetrically arranged. A transverse member 621 is provided between the two wheel seats 100. In one embodiment, brake pins are provided in both wheel seats, and a first operating member for driving the brake pins to switch from a released state to a locked state is provided on the transverse member 621. Alternatively, in another embodiment, the transverse member 621 serves as the first operating member, which is movably matched with the two wheel seats 100. In the figure, the transverse member 621 rotates relative to the wheel seats 100, and has a driving portion 622 that acts on the brake pins to switch their states, and an operating portion 623 for a user to step on. Specifically, the transverse member 621 includes a transverse rod 624 and connecting sleeves 625 provided at both ends of the transverse rod 624. The driving portion 622 is an inclined surface provided on the connecting sleeve 625. The transverse rod 624 is bent at its middle position to form a bending portion serving as the operating portion 623.

[0053] The wheel seat 100 is provided with an elastic member 626 , such as a spring, which acts on the brake pin to switch it from a locked state to a released state.

[0054] In one embodiment, the handle 630 is provided with a second operating member 631 for driving the brake arm 410. The second operating member 631 may be a brake handle and is linked to the disc brake through a hydraulic cable, wherein the number of the second operating members 631 and the disc brake is the same.

[0055] The brake structure of the trolley of the present application and the trolley equipped with the brake structure can stop normally, and in an emergency, the disc brake can apply a restraining force to the disc to perform emergency braking, which is convenient for daily use and improves safety of use.

[0056] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0057] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. The brake structure of the trolley is characterized by: include: The wheel seat comprises a fixed seat and a movable seat which can rotate relative to each other around an axis; A wheel, detachably pivotally connected to the wheel seat and engaged with the movable seat; A first braking part, which is disposed on the movable seat and rotates synchronously with the movable seat around the axis; The first brake can act on the braking part to limit the rotation of the movable seat.

2. The brake structure of the trolley according to claim 1, characterized in that: The first brake interacts with the first braking portion through friction.

3. The brake structure of the trolley according to claim 2, characterized in that: The first brake part is a disc, and the first brake includes a movable brake arm, wherein the brake arm has a restraining state of contacting the disc to restrict the rotation of the disc, and a releasing state of being separated from the disc; The movable seat comprises an outer portion and an inner portion connected by a fastener, and the disc is clamped and fixed between the inner portion and the outer portion.

4. The brake structure of the trolley according to claim 3, characterized in that: There are two brake arms, which are arranged on both sides of the disc.

5. The brake structure of the trolley according to claim 3, characterized in that: The inner side portion is plug-fitted with the fixing seat, and a bearing is arranged between the two.

6. The brake structure of the trolley according to claim 1, characterized in that: The wheel and the movable seat have a first surface and a second surface opposite to each other, and a locking mechanism is arranged between the first surface and the second surface.

7. The brake structure of the trolley according to claim 1, characterized in that: The movable seat is provided with a second braking part, and the fixed seat is movably provided with a second brake, the second brake having a locking state acting on the second braking part to prevent the movable seat from rotating, and a releasing state disengaging from the second braking part.

8. A trolley, characterized in that: It comprises a brake structure as described in any one of claims 1 to 7.

9. The trolley according to claim 8, characterized in that: The wheel seats are arranged in pairs.

10. The trolley according to claim 8, characterized in that: It comprises a handle, on which is arranged a first operating member for driving the first brake.

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