Brake structure with adjustable installation error and trundle

Abstract

The brake structure with the adjustable installation error comprises a horizontal rotating shaft and a brake assembly, the brake assembly comprises a lifting mechanism and a brake mechanism, the lifting mechanism comprises a driving piece, a top cap nut and an ejector rod, the driving piece abuts against one end of the top cap nut, the other end of the top cap nut is in threaded connection with one end of the ejector rod, and the brake mechanism is arranged on the horizontal rotating shaft. The other end of the ejector rod abuts against the braking mechanism, and the braking mechanism is used for conducting braking control on the rotating wheel structure in the up-down lifting process. The horizontal rotating shaft comprises a main shaft, the top cap nut and the ejector rod are both located in a hollow through hole of the main shaft, and an opening is formed in the position, corresponding to the top cap nut, of a shell of the main shaft. According to the utility model, the tolerance between the ejector rod and a matching piece on the braking mechanism can be compensated, so that the braking effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to mobile trundle technical field, especially a brake structure and trundle of installation error adjustable. BACKGROUND

[0002] With the development of society, the demand of various application scenes for trundle is higher and higher, which includes that the trundle can rotate freely in horizontal 360 degrees, that is, the movable trundle or universal wheel. The universal wheel can not only rotate freely in horizontal direction, but also can control the horizontal rotating shaft on the universal wheel through the brake structure, and can also control it to move only along a straight line, that is, the universal wheel has three working modes of free rotation, only straight line rotation and brake.

[0003] The brake structure realizes the mode adjustment of the universal wheel by the up-down movement of the jacking rod and the cooperation with the brake mechanism. However, in actual scene, since the cooperating parts on the jacking rod and the brake mechanism have tolerances, the two are prone to unstable contact due to the tolerance, thereby affecting the brake effect. UTILITY MODEL CONTENTS

[0004] In order to solve the above problems of the prior art, the utility model provides a brake structure and trundle with adjustable installation error, which adjusts the error of the cooperating parts on the jacking rod and the brake mechanism, thereby ensuring the brake effect.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0006] Firstly, the utility model provides a brake structure with adjustable installation error, which comprises a horizontal rotating shaft and a brake assembly. The brake assembly comprises a lifting mechanism and a brake mechanism. The lifting mechanism comprises a driving part, a top hat nut and a jacking rod. The driving part abuts against one end of the top hat nut. The other end of the top hat nut is threadedly connected with one end of the jacking rod. The other end of the jacking rod abuts against the brake mechanism. The brake mechanism is used for brake control of the rotating wheel structure in the up-down lifting process.

[0007] The horizontal rotating shaft comprises a main shaft. The top hat nut and the jacking rod are located in the hollow through hole of the main shaft. The shell of the main shaft is provided with an opening at the corresponding position of the top hat nut.

[0008] The utility model has the beneficial effect that the top hat nut is poked through the opening, so that the top hat nut and the jacking rod are screw-rotated, thereby driving the jacking rod to lift up and down, so as to compensate the tolerance of the cooperating parts on the jacking rod and the brake mechanism, thereby ensuring the brake effect.

[0009] Optionally, the outer edge of the top hat nut is a toothed groove.

[0010] According to the above description, the tooth-shaped groove facilitates adjustment.

[0011] Optionally, the outer edge of the top hat nut is uniformly surrounded by a plurality of tooth-shaped grooves.

[0012] According to the above description, the surrounding arrangement of the tooth-shaped groove further facilitates adjustment.

[0013] Optionally, the housing of the main shaft is provided with a mounting hole at a position corresponding to the opening.

[0014] Optionally, the driving member is a cam, which is located in the hollow through hole.

[0015] The cam is provided with a curved profile portion and an adjustment portion, the curved profile portion abuts one end of the top rod, and the adjustment portion is arranged in the operable area of the horizontal rotating shaft.

[0016] Optionally, the adjustment portion is an internal hexagonal hole, and the housing of the main shaft is provided with a transverse perforation at a position corresponding to the internal hexagonal hole.

[0017] Optionally, the cam further comprises a stroke blocking portion, which abuts against the main shaft when the stroke blocking portion contacts the top hat nut at both ends of the stroke of the curved profile portion.

[0018] According to the above description, the stroke blocking portion ensures that the cam and the top hat nut always abut each other.

[0019] Optionally, the brake mechanism comprises a main plate and a brake inner tooth member, one end of the main plate is provided with a U-shaped port, the U-shaped port is provided with two groups of first clamping portions in the up-down direction, the top rod is clamped with the main shaft in the horizontal direction and is sleeved with a first elastic member, and a second clamping portion is arranged in the area close to the main plate, the second clamping portion is clamped with the two groups of first clamping portions in the horizontal direction during up-down movement, respectively.

[0020] The brake inner tooth member is provided with at least one on one side of the main plate and moves with the top rod.

[0021] Optionally, the brake inner tooth member comprises a brake support, a second elastic member and an annular tooth member, one end of the brake support is movably connected with one end of the top rod, the side of the brake support away from the top rod is abuttingly connected to the second elastic member, and the annular tooth member is fixedly connected with the brake support and is provided with at least one on one side of the main plate.

[0022] In a second aspect, the utility model provides a trundle, including first aspect's a brake structure of installation error adjustable, brake mechanism is in the up-down lifting process with rotating tooth of rotating wheel structure movable joint, to brake control to rotating wheel structure.

[0023] The technical effects of the caster provided by the second aspect are described with reference to the related description of the brake structure with adjustable installation error provided by the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A structural schematic view of the brake structure with adjustable installation error according to an embodiment of the present application;

[0025] Figure 2 A partial schematic view of the brake structure with adjustable installation error according to an embodiment of the present application;

[0026] Figure 3 A structural schematic view of the caster according to an embodiment of the present application;

[0027] Figure 4 A partial schematic view of the caster according to an embodiment of the present application;

[0028] Figure 5 A cross-sectional schematic view of the caster according to an embodiment of the present application.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, horizontal rotation shaft; 11, main shaft; 110, housing; 111, hollow through hole; 112, opening; 113, transverse through hole;

[0031] 2, brake assembly; 21, lifting mechanism; 211, cam; 2111, curved profile portion; 2112, inner hexagonal hole; 2113, stroke blocking portion; 212, top hat nut; 2121, toothed groove; 213, top rod; 2131, second clamping portion; 2132, first elastic member; 2133, lifting piece; 2134, fourth elastic member; 22, brake mechanism; 221, main plate; 222, brake inner tooth piece; 2221, brake support; 2222, second elastic member; 2223, annular tooth piece; 223, U-shaped opening; 224, first clamping portion;

[0032] 100, rotating wheel structure; 101, rotating tooth. DETAILED DESCRIPTION

[0033] In order to better understand the above technical solutions, exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer, more thorough understanding of the present application and to convey the complete scope of the present application to those skilled in the art.

[0034] Embodiment one

[0035] Please refer to Figures 1 to 5 The utility model provides a kind of brake structure with adjustable installation error, including horizontal pivot 1 and brake assembly 2, brake assembly 2 includes lifting mechanism 21 and brake mechanism 22.

[0036] Combined Figure 2 And Figure 5 It can be known that lifting mechanism 21 includes driving piece, top hat nut 212 and top rod 213, driving piece is in contact with one end of top hat nut 212, the other end of top hat nut 212 is threadedly connected with one end of top rod 213, the other end of top rod 213 is in contact with brake mechanism 22, and brake mechanism 22 is used to brake control for rotating wheel structure 100 during up and down lifting. Thus, driving piece drives the up and down lifting of top rod 213, so as to drive the lifting of brake mechanism 22, so that brake mechanism 22 can brake control for rotating wheel structure 100.

[0037] Among them, horizontal pivot 1 includes main shaft 11, and top hat nut 212 and top rod 213 are located in the hollow through hole 111 of main shaft 11, and the shell 110 of main shaft 11 is provided with opening 112 at the corresponding position of top hat nut 212. In the embodiment, the outer edge of top hat nut 212 is uniformly surrounded by a plurality of tooth-shaped grooves 2121, so that the corresponding position of opening 112 always has adjustable tooth-shaped grooves 2121. User only needs to extend into opening 112 by a ruler, and realizes rotation by jiggling top hat nut 212, so that the height of top rod 213 can be changed, to compensate for the tolerance of the matching parts on top rod 213 and brake mechanism 22, which may come from part production tolerance, or be caused by subsequent wear and tear.

[0038] In the embodiment, the shell 110 of main shaft 11 is provided with mounting hole at the position corresponding to opening 112, and the mounting hole can be screw hole. Here, the mounting hole can be opening 112 itself, or one or more new hole positions uniformly arranged along the same horizontal plane in the shell 110 of main shaft 11. The mounting hole is used to install caster in application scenarios such as hospital bed, trolley, etc.

[0039] Refer to Figure 4It can be seen that the driving member in the embodiment is a cam 211 located in the hollow through hole 111. The cam 211 is provided with a curved profile portion 2111, an adjusting portion and a stroke blocking portion 2113. The curved profile portion 2111 abuts against one end of the ejector rod 213, and the adjusting portion is arranged in the operable area of the horizontal shaft 1. In the embodiment, the adjusting portion is a hexagonal hole 2112, and the housing 110 of the main shaft 11 is provided with a transverse through hole 113 at the position corresponding to the hexagonal hole 2112. Thus, the hexagonal wrench is used to rotate the cam 211, so as to adjust the up and down of the ejector rod 213. In other embodiments, the adjusting portion can also be an adjusting hole of other shapes, such as a quadrangular hole, a pentagonal hole and the like, and a corresponding wrench can be used to rotate.

[0040] The stroke blocking portion 2113 abuts against the main shaft 11 when the curved profile portion 2111 contacts the ejector rod 213 at both ends of the stroke. In the embodiment, the stroke blocking portion 2113 is an ear portion on both sides of the cam 211. When the curved profile portion 2111 abuts against the ejector rod 213, the ear portion is suspended in the hollow through hole 111 and does not restrict the rotation of the cam 211. When the curved profile portion 2111 contacts the ejector rod 213 at both ends of the stroke, the ear portion is attached to the horizontal surface of the main shaft 11, so that the cam 211 cannot continue to rotate in the original direction, thereby limiting the adjustment range of the user to the cam 211 to be always the stroke range in which the curved profile portion 2111 abuts against the ejector rod 213.

[0041] In the embodiment, the brake mechanism 22 includes a main plate 221 and a brake inner tooth member 222. One end of the main plate 221 is provided with a U-shaped opening 223, and the U-shaped opening 223 is provided with two groups of first clamping portions 224 in the up and down direction. The ejector rod 213 is clamped with the main shaft 11 in the horizontal direction and is sleeved with a first elastic member 2132. The second clamping portion 2131 is arranged in the area close to the main plate 221 and is clamped with the two groups of first clamping portions 224 in the horizontal direction during the up and down movement. Thus, when the second clamping portion 2131 of the ejector rod 213 is clamped with the two groups of first clamping portions 224 in the horizontal direction, the horizontal shaft 1 stops rotating due to the clamping in the horizontal direction, and only when the second clamping portion 2131 of the ejector rod 213 is between the two first clamping portions 224, the horizontal shaft 1 can rotate freely.

[0042] It should be noted that the two groups of first clamping portions 224 can be of the same structure or different structures, and the corresponding second clamping portion 2131 is a same component or two components. The first clamping portion 224 can be local or surround a circle. For the specific structure of the first clamping portion 224 and the second clamping portion 2131, reference can be made to the description of the embodiment. Figure 2It can be seen that the upper first retaining part 224 is a flange structure, and the lower first retaining part 224 is a toothed structure. Both are provided on both sides of the U-shaped opening 223. The corresponding second retaining part 2131 includes an upper rotating disk structure and a lower gear structure. The rotating disk structure has a notch that connects with the flange, and the gear structure and the toothed structure are meshed together. Therefore, in this embodiment, the main shaft 11 has a greater locking force, smaller gap, and greater precision, and the casters can more easily travel in a straight line.

[0043] Among them, at least one brake internal gear 222 is provided on one side of the main board 221 and moves with the push rod 213. For example... Figure 1 As shown, in this embodiment, there is one brake internal gear 222 on each side of the main board 221.

[0044] like Figure 2 As shown, a lifting member 2133 is provided at the other end of the top rod 213, and a fourth elastic member 2134 is provided on both sides of the U-shaped opening 223. The lifting member 2133 moves up and down in the U-shaped opening 223, and both sides abut against the fourth elastic member 2134.

[0045] Specifically, the brake internal gear 222 includes a brake bracket 2221, a second elastic element 2222, and an annular gear 2223. One end of the brake bracket 2221 is movably connected to one end of the push rod 213. The side of the brake bracket 2221 away from the push rod 213 is abutted against the second elastic element 2222. The annular gear 2223 is fixedly connected to the brake bracket 2221, and at least one is provided on one side of the main board 221. Thus, the brake bracket 2221 moves with the push rod 213, thereby driving the annular gear 2223 to move, so as to movably connect with the rotating tooth 101 of the rotary wheel structure 100. Specifically, the annular gear 2223 and the rotating tooth 101 are respectively provided with dense triangular teeth. Through the bonding of multiple triangular teeth, the connection is tighter, the gap is smaller, and there is less wobbling.

[0046] In this embodiment, the first elastic element 2132, the second elastic element 2222 and the fourth elastic element 2134 are all spring structures, used to provide the rebound reset of the push rod 213 and the brake bracket 2221.

[0047] In this embodiment, the brake structure, except for the brake bracket 2221 and the ring gear 2223, is made of metal, which has the characteristics of high strength and long service life.

[0048] Example 2

[0049] Please refer to Figures 1 to 5The utility model provides a trundle, including the brake structure of one kind of installation error adjustable of embodiment one, brake mechanism 22 is in the up and down lifting process with the rotation tooth 101 of the rotation wheel structure 100 active connection to the brake control of rotation wheel structure 100, wherein, rotation wheel structure 100 refers to prior art, the utility model does not repeat.

[0050] In conclusion, for the trundle, the adjustment process of three gear working modes is as follows: the cam 211 is rotated through the inner hexagonal spanner, the top rod 213 is driven to go up and down, when the second clamping part 2131 of the top rod 213 is clamped with the upper first clamping part 224 in the horizontal direction, the horizontal rotating shaft 1 is affected by the top rod 213 and thus remains stationary, at this time, the annular tooth part 2223 on the brake mechanism 22 is not in contact with the rotation tooth 101, and does not affect the linear rotation of the rotation wheel structure 100, therefore, the trundle is in the straight mode. When the top rod 213 continues to descend, the second clamping part 2131 of the top rod 213 is between the two first clamping parts 224, and neither the horizontal rotating shaft 1 nor the rotation wheel structure 100 is constrained, therefore, the trundle is in the full free rotation mode. When the top rod 213 continues to descend, the second clamping part 2131 of the top rod 213 is clamped with the lower first clamping part 224 in the horizontal direction, the horizontal rotating shaft 1 is affected by the top rod 213 and thus remains stationary, and the rotation tooth 101 of the rotation wheel structure 100 is meshed by the annular tooth part 2223 on the brake mechanism 22 and thus remains stationary, thereby making the trundle be in the brake stationary mode.

[0051] In the description of the utility model, it is to be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0052] In the utility model, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0053] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "under" and "under" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0054] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0055] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A brake structure with adjustable mounting error, characterized by, The horizontal rotating shaft comprises a main shaft, and the top hat nut and the top rod are located in a hollow through hole of the main shaft, and the shell of the main shaft is provided with an opening at a position corresponding to the top hat nut. The outer edge of the top hat nut is uniformly surrounded by a plurality of tooth-shaped grooves.

2. The brake structure according to claim 1, wherein The shell of the main shaft is provided with a mounting hole at a position corresponding to the opening.

3. The brake structure of claim 1, wherein The driving member is a cam, and the cam is located in the hollow through hole.

4. The brake structure of claim 1, wherein The cam is provided with a curved profile portion and an adjusting portion, the curved profile portion abuts against one end of the top rod, and the adjusting portion is arranged in an operable region of the horizontal rotating shaft. The adjusting portion is an internal hexagonal hole, and the shell of the main shaft is provided with a transverse perforation at a position corresponding to the internal hexagonal hole.

5. The brake structure of claim 4, wherein The cam further comprises a stroke blocking portion, which abuts against the main shaft when the stroke blocking portion contacts the top hat nut at both ends of the stroke of the curved profile portion.

6. The brake structure of claim 5, wherein The brake mechanism comprises a main plate and a brake inner tooth piece, one end of the main plate is provided with a U-shaped port, the U-shaped port is provided with two groups of first clamping portions along the up-down direction, the top rod is clamped with the main shaft in the horizontal direction and is sleeved with a first elastic member, and a second clamping portion is arranged in a region close to the main plate, and the second clamping portion is clamped with two groups of first clamping portions in the horizontal direction during up-down movement.

7. The brake structure of claim 1, wherein The brake inner tooth piece is provided with at least one on one side of the main plate and moves with the top rod. The brake inner tooth piece comprises a brake support, a second elastic member and an annular tooth piece, one end of the brake support is movably connected with one end of the top rod, the side of the brake support away from the top rod is abuttingly connected to the second elastic member, and the annular tooth piece is fixedly connected with the brake support and is provided with at least one on one side of the main plate.

8. The brake structure of claim 7, wherein The horizontal rotating shaft comprises a main shaft, and the top hat nut and the top rod are located in a hollow through hole of the main shaft, and the shell of the main shaft is provided with an opening at a position corresponding to the top hat nut.

9. A caster characterized by, The outer edge of the top hat nut is uniformly surrounded by a plurality of tooth-shaped grooves. The shell of the main shaft is provided with a mounting hole at a position corresponding to the opening. The driving member is a cam, and the cam is located in the hollow through hole. The cam is provided with a curved profile portion and an adjusting portion, the curved profile portion abuts against one end of the top rod, and the adjusting portion is arranged in an operable region of the horizontal rotating shaft. The adjusting portion is an internal hexagonal hole, and the shell of the main shaft is provided with a transverse perforation at a position corresponding to the internal hexagonal hole. The cam further comprises a stroke blocking portion, which abuts against the main shaft when the stroke blocking portion contacts the top hat nut at both ends of the stroke of the curved profile portion. The brake mechanism comprises a main plate and a brake inner tooth piece, one end of the main plate is provided with a U-shaped port, the U-shaped port is provided with two groups of first clamping portions along the up-down direction, the top rod is clamped with the main shaft in the horizontal direction and is sleeved with a first elastic member, and a second clamping portion is arranged in a region close to the main plate, and the second clamping portion is clamped with two groups of first clamping portions in the horizontal direction during up-down movement. The brake inner tooth piece is provided with at least one on one side of the main plate and moves with the top rod. The brake inner tooth piece comprises a brake support, a second elastic member and an annular tooth piece, one end of the brake support is movably connected with one end of the top rod, the side of the brake support away from the top rod is abuttingly connected to the second elastic member, and the annular tooth piece is fixedly connected with the brake support and is provided with at least one on one side of the main plate. The horizontal rotating shaft comprises a main shaft, and the top hat nut and the top rod are located in a hollow through hole of the main shaft, and the shell of the main shaft is provided with an opening at a position corresponding to the top hat nut. The outer edge of the top hat nut is uniformly surrounded by a plurality of tooth-shaped grooves. The shell of the main shaft is provided with a mounting hole at a position corresponding to the opening. The driving member is a cam, and the cam is located in the hollow through hole. The cam is provided with a curved profile portion and an adjusting portion, the curved profile portion abuts against one end of the top rod, and the adjusting portion is arranged in an operable region of the horizontal rotating shaft. The adjusting portion is an internal hexagonal hole, and the shell of the main shaft is provided with a transverse perforation at a position corresponding to the internal hexagonal hole. The cam further comprises a stroke blocking portion, which abuts against the main shaft when the stroke blocking portion contacts the top hat nut at both ends of the stroke of the curved profile portion. The brake mechanism comprises a main plate and a brake inner tooth piece, one end of the main plate is provided with a U-shaped port, the U-shaped port is provided with two groups of first clamping portions along the up-down direction, the top rod is clamped with the main shaft in the horizontal direction and is sleeved with a first elastic member, and a second clamping portion is arranged in a region close to the main plate, and the second clamping portion is clamped with two groups of first clamping portions in the horizontal direction during up-down movement. The brake inner tooth piece is provided with at least one on one side of the main plate and moves with the top rod.

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