Rotating mechanism and novel cart device

Abstract

The utility model relates to a rotating mechanism and a novel cart device. The rotating mechanism comprises a support unit, an outer sleeve unit and an inner sleeve unit. The frame mechanism has the advantages that the outer sleeve unit is not in direct contact with the frame mechanism through the support unit, abrasion of the outer sleeve unit to an opening of the frame mechanism in the rotating process is reduced, and the service life of the frame mechanism is prolonged; through cooperation of the inner sleeve unit and the outer sleeve unit, direct contact between the handrail mechanism and the outer sleeve unit is avoided, abrasion of the handrail mechanism to the outer sleeve unit is reduced, and the service life of the outer sleeve unit is prolonged; and the outer sleeve unit is matched with the inner sleeve unit, so that the handrail mechanism is prevented from shaking, and the stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of handcart technology, and in particular to a rotating mechanism and a novel handcart device. Background Technology

[0002] For existing handcarts with two-wheel and four-wheel modes, the handlebar mechanism generally rotates relative to the frame mechanism via a rotating mechanism, and the handlebar mechanism and rotating mechanism also slide relative to each other. As the usage time increases, in the rotating position, the rotating mechanism and the frame structure continuously rotate, and the openings in the frame mechanism generally become larger due to wear, making them prone to wobbling.

[0003] Furthermore, with prolonged use, the handrail mechanism and the rotating mechanism continuously slide against each other, causing wear on both and resulting in gaps between them. As the gaps widen with continued use, the handrail mechanism begins to wobble.

[0004] Currently, no effective solutions have been proposed for the problems in related technologies, such as wear and tear on the frame mechanism, rotating mechanism, and handrail mechanism due to long-term use, as well as the wobbling caused by the gaps created by the wear. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by providing a rotating mechanism and a novel trolley device to solve problems such as wear and tear on the frame mechanism, rotating mechanism, and handrail mechanism due to long-term use, as well as wobbling caused by the gaps created by wear.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] In a first aspect, a rotating mechanism is provided for a handcart that can switch between a two-wheeled mode and a four-wheeled mode, comprising:

[0008] A support unit is used to install at the end of the frame mechanism of a handcart;

[0009] The outer tube unit is detachably connected to the support unit and is movably connected to the support unit, and is used to switch between two-wheel mode and four-wheel mode;

[0010] The inner sleeve unit is detachably connected to the outer sleeve unit and is movably mounted at the end of the handrail mechanism of the trolley, and under the action of the handrail mechanism, drives the outer sleeve unit to switch between two-wheel mode and four-wheel mode.

[0011] In some embodiments, the support unit includes:

[0012] The first support element is used to be mounted at the end of the frame mechanism of the handcart;

[0013] A first rotating element is disposed on the first support element and is detachably and movably connected to the outer sleeve unit;

[0014] An extension element is disposed at the bottom of the first support element;

[0015] A first positioning element is disposed on the first support element and is used to limit the position of the outer tube unit;

[0016] A second positioning element is disposed on the extension element to limit the position of the outer sleeve unit.

[0017] In some embodiments, the support unit further includes:

[0018] A first limiting element is disposed on the extension element for removably limiting connection with the handrail mechanism of the trolley.

[0019] In some embodiments, the support unit further includes:

[0020] At least one second limiting element is disposed on the extension element for removably limiting connection with the handrail mechanism of the trolley.

[0021] In some embodiments, the outer tube unit includes:

[0022] An outer sleeve element is movably disposed on the side of the support unit, and an inner sleeve unit is removably disposed inside the outer sleeve element for switching between two-wheel mode and four-wheel mode following the inner sleeve unit;

[0023] The second rotating element is disposed on the side of the outer sleeve element and is detachably and movably connected to the support unit, and is used to rotate relative to the support unit under the action of the outer sleeve element.

[0024] In some embodiments, the outer tube unit further includes:

[0025] At least one first connecting element is disposed at the top end of the outer sleeve element and is detachably connected to the inner sleeve unit.

[0026] In some embodiments, the outer tube unit further includes:

[0027] At least one second connecting element is disposed at the bottom end of the outer sleeve element and is detachably connected to the inner sleeve unit.

[0028] In some embodiments, the outer tube unit further includes:

[0029] At least one third limiting element is provided at the top of the outer sleeve element to limit the position of the handrail mechanism of the trolley.

[0030] In some embodiments, the inner sleeve unit includes:

[0031] An inner sleeve element is detachably connected to the outer sleeve unit, and is movably mounted at the end of the handrail mechanism of the trolley, and drives the outer sleeve unit to switch between two-wheel mode and four-wheel mode under the action of the handrail mechanism.

[0032] In some embodiments, the inner sleeve unit further includes:

[0033] At least one third connecting element is disposed at the top end of the inner sleeve element and is detachably connected to the outer sleeve unit.

[0034] In some embodiments, the inner sleeve unit further includes:

[0035] At least one fourth connecting element is disposed at the bottom end of the inner sleeve element and is detachably connected to the outer sleeve unit.

[0036] In some embodiments, the inner sleeve unit further includes:

[0037] At least one fourth limiting element is provided at the top of the inner sleeve element to limit the position of the handrail mechanism of the trolley.

[0038] Secondly, a novel trolley device is provided, comprising:

[0039] Chassis mechanism;

[0040] The armrest mechanism is movably connected to the frame mechanism and is used to switch between two-wheel mode and four-wheel mode in cooperation with the frame structure.

[0041] The rotating mechanism described in the first aspect is disposed between the frame mechanism and the handrail mechanism, and is used to switch the handrail mechanism and the frame mechanism between two-wheel mode and four-wheel mode;

[0042] The first wheel mechanism is located at the end of the frame mechanism and is used to move the new trolley device in two-wheel mode or four-wheel mode.

[0043] The second wheel mechanism, located at the end of the armrest mechanism, is used for movement when the new trolley device is in four-wheel mode.

[0044] In some embodiments, the frame mechanism includes:

[0045] Two longitudinal frame elements are symmetrically arranged. The first end of each of the two longitudinal frame elements is provided with a corresponding rotating mechanism, and the second end of each of the two longitudinal frame elements is provided with the first wheel mechanism.

[0046] A transverse frame element is disposed between two longitudinal frame elements, and both ends of the transverse frame element are respectively connected to the two longitudinal frame elements.

[0047] In some embodiments, the frame mechanism further includes:

[0048] At least one reinforcing element is disposed between the two longitudinal frame elements, and the two ends of the reinforcing element are respectively connected to the two longitudinal frame elements.

[0049] In some embodiments, the armrest mechanism includes:

[0050] Two longitudinal handrail elements are symmetrically arranged, and each longitudinal handrail element is movably connected to the corresponding rotating mechanism.

[0051] A transverse handrail element is disposed between two longitudinal handrail elements, and both ends of the transverse handrail element are respectively connected to the second ends of the two longitudinal handrail elements;

[0052] Two second support elements are respectively disposed at the first end of the corresponding longitudinal handrail element and are respectively connected to the second wheel mechanism;

[0053] A fifth connecting element is disposed between the two second support elements, and both ends of the fifth connecting element are respectively connected to the two second support elements, for connecting with the two rotating mechanisms when the new trolley device is in four-wheel mode.

[0054] In some embodiments, the armrest mechanism further includes:

[0055] A plurality of fifth limiting elements are respectively disposed on the corresponding longitudinal handrail elements, for connecting with the corresponding rotating mechanism when the new trolley device is in two-wheel mode.

[0056] In some embodiments, the armrest mechanism further includes:

[0057] A plurality of sixth limiting elements are respectively disposed on the corresponding second bracket elements, for connecting with the corresponding rotating mechanism when the new trolley device is in four-wheel mode.

[0058] In some embodiments, the first wheel mechanism includes:

[0059] Two third support elements are symmetrically arranged at the second end of the frame mechanism and connected to the frame mechanism respectively;

[0060] Two first wheel elements are movably disposed on the corresponding third support elements for movement.

[0061] In some embodiments, the first wheel mechanism further includes:

[0062] The two transmission elements are respectively connected to the two first wheel elements.

[0063] In some embodiments, the second wheel mechanism includes:

[0064] Two fourth support elements are symmetrically arranged at the bottom end of the handrail mechanism and are respectively connected to the handrail mechanism;

[0065] Two second wheel elements are movably disposed on the corresponding fourth support elements for movement.

[0066] In some embodiments, the second wheel mechanism further includes:

[0067] Two braking elements are respectively movably disposed on the corresponding fourth bracket element, for locking or unlocking the corresponding second wheel element.

[0068] In some of these embodiments, it also includes:

[0069] A locking mechanism is provided on the frame mechanism and removably locked to the armrest mechanism, for locking the armrest mechanism and unlocking the armrest mechanism to allow the armrest mechanism to move relative to the frame mechanism when the new trolley device is in two-wheel mode.

[0070] In some embodiments, the locking mechanism includes:

[0071] Two fifth support elements are symmetrically arranged on the frame mechanism;

[0072] Two seventh limiting elements are respectively disposed on the corresponding fifth bracket elements, and are used to connect with the handrail mechanism when the new trolley device is in two-wheel mode;

[0073] A first control element is movably disposed between the two fifth support elements;

[0074] Two second control elements are respectively movably disposed on the corresponding fifth support element and respectively connected to both ends of the first control element, for rotating under the action of the first control element;

[0075] Two locking elements are respectively movably disposed on the corresponding fifth support element and respectively contact the corresponding second control element, and respectively are removably locked to the handrail mechanism, for locking the handrail mechanism and releasing the handrail mechanism under the action of the second control element.

[0076] In some of these embodiments, it also includes:

[0077] A baffle mechanism is provided at the second end of the frame mechanism for placing items when the new trolley device is in two-wheel mode.

[0078] In some of these embodiments, it also includes:

[0079] At least one fixing mechanism is provided on the frame mechanism for detachable connection with the stacking box.

[0080] In some embodiments, the fixing mechanism includes:

[0081] Two fixing elements are symmetrically arranged on both sides of the frame mechanism;

[0082] A plurality of recessed elements are respectively disposed on the corresponding fixing elements and respectively connected to both sides of the stacking box;

[0083] A plurality of protruding elements are respectively disposed on the corresponding fixed elements and located on the side of the corresponding recessed elements, and respectively connected to the two sides of the stacking box.

[0084] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0085] This utility model discloses a rotating mechanism and a novel trolley device. By utilizing a support unit, the outer sleeve unit avoids direct contact with the frame mechanism, reducing wear on the openings in the frame mechanism during rotation and extending the frame mechanism's service life. Furthermore, the cooperation between the inner and outer sleeve units prevents direct contact between the handrail mechanism and the outer sleeve unit, reducing wear and extending the outer sleeve unit's service life. Finally, the cooperation between the outer and inner sleeve units prevents the handrail mechanism from wobbling, improving stability. Attached Figure Description

[0086] Figure 1 This is a schematic diagram of a rotating mechanism in a two-wheel mode according to an embodiment of the present utility model;

[0087] Figure 2 This is a schematic diagram of a rotating mechanism in four-wheel mode according to an embodiment of the present utility model;

[0088] Figure 3 This is a schematic diagram of the outer sleeve unit and the inner sleeve unit according to an embodiment of the present utility model;

[0089] Figures 4-5 This is a schematic diagram of a support unit according to an embodiment of the present utility model;

[0090] Figure 6 This is a schematic diagram of the outer tube unit according to an embodiment of the present utility model;

[0091] Figure 7 This is a schematic diagram of the inner sleeve unit according to an embodiment of the present utility model;

[0092] Figure 8 This is a schematic diagram of a novel trolley device in two-wheel mode according to an embodiment of the present utility model;

[0093] Figure 9 This is a schematic diagram of a novel trolley device in four-wheel mode according to an embodiment of the present utility model;

[0094] Figure 10 This is a schematic diagram of the vehicle frame mechanism according to an embodiment of the present utility model;

[0095] Figure 11 This is a schematic diagram of the handrail mechanism according to an embodiment of the present utility model;

[0096] Figure 12 This is a schematic diagram of the first wheel mechanism according to an embodiment of the present utility model;

[0097] Figure 13 This is a schematic diagram of the second wheel mechanism according to an embodiment of the present utility model;

[0098] Figure 14 This is a schematic diagram of the locking mechanism according to an embodiment of the present utility model;

[0099] Figure 15 This is a partial schematic diagram of the locking mechanism according to an embodiment of the present utility model;

[0100] Figure 16 This is a schematic diagram of the fixing mechanism according to an embodiment of the present utility model.

[0101] The attached figures are labeled as follows: 100, rotating mechanism;

[0102] 110. Support unit; 111. First support element; 112. First rotating element; 113. Extension element; 114. First positioning element; 115. Second positioning element; 116. First limiting element; 117. Second limiting element;

[0103] 120. Outer tube unit; 121. Outer tube element; 122. Second rotating element; 123. First connecting element; 124. Second connecting element; 125. Third limiting element;

[0104] 130. Inner sleeve unit; 131. Inner sleeve element; 132. Third connecting element; 133. Fourth connecting element; 134. Fourth limiting element;

[0105] 200. Chassis structure; 201. Longitudinal chassis components; 202. Transverse chassis components; 203. Reinforcing components;

[0106] 300. Handrail mechanism; 301. Longitudinal handrail element; 302. Lateral handrail element; 303. Second support element; 304. Fifth connecting element; 305. Fifth limiting element; 306. Sixth limiting element;

[0107] 400. First wheel mechanism; 401. Third support element; 402. First wheel element; 403. Transmission element;

[0108] 500. Second wheel mechanism; 501. Fourth support element; 502. Second wheel element; 503. Braking element;

[0109] 600. Locking mechanism; 601. Fifth support element; 602. Seventh limit element; 603. First control element; 604. Second control element; 605. Locking element;

[0110] 700. Baffle mechanism;

[0111] 800. Fixing mechanism; 801. Fixing element; 802. Recessed element; 803. Protruding element. Detailed Implementation

[0112] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0113] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0114] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0115] Example 1

[0116] This embodiment relates to the rotating mechanism of this utility model.

[0117] An illustrative embodiment of this utility model, such as Figures 1-3 As shown, a rotating mechanism 100 is used for a handcart that can switch between two-wheel and four-wheel modes, including a support unit 110, an outer sleeve unit 120, and an inner sleeve unit 130. The outer sleeve unit 120 is detachably connected to and movably connected to the support unit 110, and is used to switch between two-wheel and four-wheel modes. The inner sleeve unit 130 is detachably connected to the outer sleeve unit 120, and is movably disposed at the end of the handrail mechanism of the handcart, and, under the action of the handrail mechanism, drives the outer sleeve unit 120 to switch between two-wheel and four-wheel modes.

[0118] like Figures 4-5 As shown, the support unit 110 includes a first support element 111, a first rotating element 112, an extension element 113, a first positioning element 114, and a second positioning element 115. The first support element 111 is disposed at the end of the trolley's frame mechanism; the first rotating element 112 is disposed on the first support element 111 and is detachably connected to the outer tube unit 120; the extension element 113 is disposed at the bottom of the first support element 111; the first positioning element 114 is disposed on the first support element 111 and is used to limit the position of the outer tube unit 120; the second positioning element 115 is disposed on the extension element 113 and is used to limit the position of the outer tube unit 120.

[0119] In some embodiments, the first support element 111 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0120] The first bracket element 111 is detachably connected to the frame mechanism, including but not limited to plug-in, snap-in, and bolt (group) connections. For example, the first bracket element 111 can be plugged into the frame mechanism first, and then connected using bolts (groups) to improve the connection strength.

[0121] In some of these embodiments, the first support element 111 is U-shaped or L-shaped.

[0122] In some of these embodiments, the first support element 111 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0123] In some of these embodiments, the first support element 111 includes, but is not limited to, a mounting bracket.

[0124] In some of these embodiments, the first rotating element 112 is plugged into the frame mechanism.

[0125] The first rotating element 112 is fixedly connected to the first support element 111, including but not limited to being integrally formed.

[0126] The first rotating element 112 has a hollow structure.

[0127] In some of these embodiments, the first rotating element 112 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0128] In some of these embodiments, the first rotating element 112 includes, but is not limited to, a rotating sleeve.

[0129] The extension element 113 is fixedly connected to the first support element 111, including but not limited to being integrally formed.

[0130] In some of these embodiments, the extension element 113 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0131] In some of these embodiments, the extension element 113 includes, but is not limited to, an extension bracket, an extension plate, etc.

[0132] The first positioning element 114 is fixedly connected to the first support element 111 or detachably connected, including but not limited to welding, integral molding, plugging, snap-fitting, etc.

[0133] In some of these embodiments, the first positioning element 114 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0134] In some embodiments, the first positioning element 114 includes at least a first lateral positioning surface and a first longitudinal positioning surface. Specifically, when the outer sleeve unit 120 is in two-wheel mode, the outer sleeve unit 120 abuts against the first lateral positioning surface; when the outer sleeve unit 120 is in four-wheel mode, the outer sleeve unit 120 abuts against the first longitudinal positioning surface.

[0135] In some of these embodiments, the first positioning element 114 includes, but is not limited to, a positioning bracket, a positioning baffle, etc.

[0136] The second positioning element 115 is fixedly connected to the extension element 113 or detachably connected, including but not limited to welding, integral molding, plugging, snap-fitting, etc.

[0137] In some of these embodiments, the second positioning element 115 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0138] In some embodiments, the second positioning element 115 includes at least a second lateral positioning surface and a second longitudinal positioning surface. Specifically, when the outer sleeve unit 120 is in two-wheel mode, the outer sleeve unit 120 abuts against the second lateral positioning surface; when the outer sleeve unit 120 is in four-wheel mode, the outer sleeve unit 120 abuts against the second longitudinal positioning surface.

[0139] In some of these embodiments, the second positioning element 115 includes, but is not limited to, a positioning bracket, a positioning baffle, etc.

[0140] Furthermore, the support unit 110 also includes a first limiting element 116. The first limiting element 116 is disposed on the extension element 113 and is used to removably limit the connection with the handrail mechanism of the trolley.

[0141] The first limiting element 116 is disposed through the extension element 113.

[0142] In some of the embodiments, the first limiting element 116 includes, but is not limited to, a limiting hole and a limiting groove.

[0143] Furthermore, the support unit 110 also includes at least one second limiting element 117. The second limiting element 117 is disposed on the extension element 113 and is used for a removable limiting connection with the handrail mechanism of the trolley.

[0144] The second limiting element 117 is disposed through the extension element 113.

[0145] In some embodiments, there are multiple second limiting elements 117. The multiple second limiting elements 117 are spaced apart along the width direction of the extending element 113.

[0146] In some of these embodiments, the second limiting element 117 includes, but is not limited to, a limiting hole and a limiting groove.

[0147] like Figure 6 As shown, the outer sleeve unit 120 includes an outer sleeve element 121 and a second rotating element 122. The outer sleeve element 121 is movably disposed on the side of the support unit 110, and an inner sleeve unit 130 is removably disposed inside the outer sleeve element 121 for switching between two-wheel and four-wheel modes following the inner sleeve unit 130. The second rotating element 122 is disposed on the side of the outer sleeve element 121 and is detachably and movably connected to the support unit 110, for relative rotation with the support unit 110 under the action of the outer sleeve element 121.

[0148] Specifically, the outer sleeve element 121 is movably disposed on the side of the first support element 111; the second rotating element 122 is detachably and movably connected to the first rotating element 112.

[0149] In some of these embodiments, the outer sheath element 121 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0150] In some embodiments, the outer tube element 121 is trapezoidal. For example, the height of the outer tube element 121 increases from one side to the other.

[0151] The second rotating element 122 is fixedly connected to or detachably connected to the outer sleeve element 121, including but not limited to welding, plugging, snap-fitting, bolt (group) connection, etc.

[0152] In some of these embodiments, the second rotating element 122 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0153] In some embodiments, the end of the second rotating element 122 protrudes beyond the first rotating element 112. Furthermore, the protruding portion of the second rotating element 122 can be locked by a locking structure (e.g., bolts (sets)).

[0154] In some of these embodiments, the second rotating element 122 includes, but is not limited to, a rotating shaft.

[0155] In this invention, the second rotating element 122 does not directly contact the frame mechanism, reducing wear on the opening position of the frame mechanism due to the rotation of the second rotating element 122, preventing loosening, and improving long-term service life.

[0156] In some of these embodiments, the outer sleeve element 121 includes, but is not limited to, a sleeve.

[0157] Furthermore, the outer sleeve unit 120 also includes at least one first connecting element 123. The first connecting element 123 is disposed at the top end of the outer sleeve unit 121 and is detachably connected to the inner sleeve unit 130.

[0158] In some of these embodiments, the first connecting element 123 is disposed through the outer sleeve element 121.

[0159] In some embodiments, there are multiple first connecting elements 123. The multiple first connecting elements 123 are spaced apart along the length and / or width direction of the outer sleeve element 121.

[0160] In some of these embodiments, the first connecting element 123 includes, but is not limited to, a connecting groove, a slot, a socket, etc.

[0161] Furthermore, the outer sleeve unit 120 also includes at least one second connecting element 124. The second connecting element 124 is disposed at the bottom end of the outer sleeve element 121 and is detachably connected to the inner sleeve unit 130.

[0162] In some of these embodiments, the second connecting element 124 is disposed through the outer sleeve element 121.

[0163] In some embodiments, there are multiple second connecting elements 124. These multiple second connecting elements 124 are spaced apart along the length and / or width direction of the outer sleeve element 121.

[0164] In some of these embodiments, the second connecting element 124 includes, but is not limited to, a connecting groove, a slot, a socket, etc.

[0165] Furthermore, the outer tube unit 120 also includes at least one third limiting element 125. The third limiting element 125 is disposed at the top end of the outer tube unit 121 and is used to limit the position of the handrail mechanism of the trolley.

[0166] In some of these embodiments, the third limiting element 125 is disposed through the outer sleeve element 121.

[0167] In some embodiments, there are multiple third limiting elements 125. The multiple third limiting elements 125 are spaced apart along the length and / or width direction of the outer sleeve element 121.

[0168] In some of these embodiments, the third limiting element 125 includes, but is not limited to, a limiting groove.

[0169] like Figure 7 As shown, the inner sleeve unit 130 includes an inner sleeve element 131. The inner sleeve element 131 is detachably connected to the outer sleeve unit 120 and is movably disposed at the end of the handrail mechanism of the trolley, and drives the outer sleeve unit 120 to switch between two-wheel mode and four-wheel mode under the action of the handrail mechanism.

[0170] Specifically, the inner sleeve element 131 and the outer sleeve element 121 are detachably connected.

[0171] The inner sleeve element 131 and the outer sleeve element 121 are detachably connected, including but not limited to plug-in, snap-fit, bolt connection, etc.

[0172] In some of these embodiments, the inner sleeve element 131 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0173] In some of these embodiments, the inner sleeve element 131 includes, but is not limited to, a sleeve.

[0174] In a preferred embodiment of this invention, the outer sleeve element 121 is made of a metal material, while the inner sleeve element 131 is made of a non-metallic material (such as plastic). The purpose of this design is to avoid direct contact between the handrail mechanism and the outer sleeve element 121, reducing wear on the outer sleeve element 121 and improving its long-term service life. Furthermore, the replaceable inner sleeve element 131 allows for selection of an appropriate specification (e.g., wall thickness) for different handrail mechanisms, preventing wobbling of the handrail mechanism.

[0175] Furthermore, the inner sleeve unit 130 also includes at least one third connecting element 132. The third connecting element 132 is disposed at the top end of the inner sleeve unit 131 and is detachably connected to the outer sleeve unit 120.

[0176] Specifically, the third connecting element 132 is detachably connected to the first connecting element 123.

[0177] The third connecting element 132 is fixedly connected to the inner sleeve element 131, including but not limited to integral molding.

[0178] The number of third connecting elements 132 matches the number of first connecting elements 123. Generally, the number of third connecting elements 132 is equal to the number of first connecting elements 123.

[0179] In some embodiments, there are multiple third connecting elements 132. The multiple third connecting elements 132 are spaced apart along the length and / or width direction of the inner sleeve element 131.

[0180] In some embodiments, the third connecting element 132 includes, but is not limited to, a connecting block, a card block, a plug block, etc.

[0181] Furthermore, the inner sleeve unit 130 also includes at least one fourth connecting element 133. The fourth connecting element 133 is disposed at the bottom end of the inner sleeve unit 131 and is detachably connected to the outer sleeve unit 120.

[0182] Specifically, the fourth connecting element 133 is detachably connected to the second connecting element 124.

[0183] The fourth connecting element 133 is fixedly connected to the inner sleeve element 131, including but not limited to integral molding.

[0184] The number of fourth connecting elements 133 matches the number of second connecting elements 124. Generally, the number of third connecting elements 132 is equal to the number of second connecting elements 124.

[0185] In some embodiments, there are multiple fourth connecting elements 133. The multiple fourth connecting elements 133 are spaced apart along the length and / or width direction of the inner sleeve element 131.

[0186] In some embodiments, the fourth connecting element 133 includes, but is not limited to, a connecting block, a card block, a plug block, etc.

[0187] Furthermore, the inner sleeve unit 130 also includes at least one fourth limiting element 134. The fourth limiting element 134 is disposed at the top end of the inner sleeve unit 131 and is used to limit the position of the handrail mechanism of the trolley.

[0188] In some of these embodiments, the fourth limiting element 134 corresponds to the third limiting element 125.

[0189] In some of these embodiments, the fourth limiting element 134 is disposed through the inner sleeve element 131.

[0190] The number of fourth limiting elements 134 matches the number of third limiting elements 125. Generally, the number of fourth limiting elements 134 is equal to the number of third limiting elements 125.

[0191] In some embodiments, there are multiple fourth limiting elements 134. The multiple fourth limiting elements 134 are spaced apart along the length and / or width direction of the inner sleeve element 131.

[0192] In some of these embodiments, the fourth limiting element 134 includes, but is not limited to, a limiting groove.

[0193] The technical effects of this utility model are as follows:

[0194] 1) The use of the bracket unit prevents the outer tube unit from directly contacting the frame mechanism, reducing wear on the openings of the frame mechanism during the rotation of the outer tube unit and improving the service life of the frame mechanism.

[0195] 2) By utilizing the cooperation between the inner sleeve unit and the outer sleeve unit, direct contact between the handrail mechanism and the outer sleeve unit is avoided, reducing the wear of the handrail mechanism on the outer sleeve unit and improving the service life of the outer sleeve unit.

[0196] 3) By utilizing the cooperation between the outer sleeve unit and the inner sleeve unit, the handrail mechanism is prevented from shaking, thus improving stability.

[0197] Example 2

[0198] This embodiment relates to a novel trolley device of the present invention.

[0199] An illustrative embodiment of this utility model, such as Figures 8-9As shown, a novel trolley device includes a frame mechanism 200, a handle mechanism 300, two rotating mechanisms 100 as described in Embodiment 1, a first wheel mechanism 400, and a second wheel mechanism 500. The handle mechanism 300 is movably connected to the frame mechanism 200 and is used to switch between two-wheel and four-wheel modes in cooperation with the frame structure. The rotating mechanism 100 is disposed between the frame mechanism 200 and the handle mechanism 300, and is used to switch the handle mechanism 300 and the frame mechanism 200 between two-wheel and four-wheel modes. The first wheel mechanism 400 is disposed at the end of the frame mechanism 200 and is used to move when the novel trolley device is in two-wheel or four-wheel mode. The second wheel mechanism 500 is disposed at the end of the handle mechanism 300 and is used to move when the novel trolley device is in four-wheel mode.

[0200] The novel trolley device of this utility model has a two-wheel mode and a four-wheel mode:

[0201] (I) Two-wheel mode

[0202] When the new trolley device is in two-wheel mode, the handle mechanism 300 is set parallel to the frame mechanism 200. At this time, the second wheel mechanism 500 is set close to the first wheel mechanism 400.

[0203] When in use, the new trolley device is set perpendicular to the horizontal plane, that is, the frame mechanism 200 is perpendicular to the horizontal plane and the handle mechanism 300 is located on the rear side of the frame mechanism 200.

[0204] During movement, the movement is achieved via the first wheel mechanism 400;

[0205] (II) Four-wheel mode

[0206] When the new trolley device is in four-wheel mode, the handle mechanism 300 is set perpendicular to the frame mechanism 200. At this time, the second wheel mechanism 500 is set away from the first wheel mechanism 400.

[0207] When in use, the frame mechanism 200 is parallel to the horizontal plane, and the handrail mechanism 300 is perpendicular to the horizontal plane;

[0208] During movement, the movement is achieved through the first-round mechanism 400 and the second-round mechanism 500.

[0209] like Figure 10As shown, the frame mechanism 200 includes two longitudinal frame elements 201 and a transverse frame element 202. The two longitudinal frame elements 201 are symmetrically arranged, and each of the two longitudinal frame elements 201 has a corresponding rotating mechanism 100 at its first end and a first wheel mechanism 400 at its second end. The transverse frame element 202 is disposed between the two longitudinal frame elements 201, and both ends of the transverse frame element 202 are connected to the two longitudinal frame elements 201.

[0210] Specifically, the first ends of the two longitudinal frame elements 201 are respectively connected to the two first support elements 111.

[0211] In some of these embodiments, the longitudinal frame element 201 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for insertion, snap-fitting or connection with other structural units (or elements) by bolts (groups).

[0212] In some of these embodiments, the longitudinal frame element 201 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0213] In some of these embodiments, the longitudinal frame element 201 includes, but is not limited to, a longitudinal frame.

[0214] In some embodiments, the transverse frame element 202 is provided with a number of hole structures and / or a number of groove structures and / or a number of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0215] The two ends of the transverse frame element 202 are respectively connected to the first ends of the two longitudinal frame elements 201, including but not limited to fixed connections and detachable connections, such as welding, integral molding, plug-in, snap-fit, bolt (group) connections, etc. For example, the transverse frame element 202 can be plugged into the longitudinal frame element 201 first, and then connected with bolts (groups) to improve the connection strength.

[0216] In some of these embodiments, the transverse frame element 202 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0217] In some of these embodiments, the transverse frame element 202 includes, but is not limited to, the transverse frame.

[0218] Furthermore, the frame mechanism 200 also includes at least one reinforcing element 203. The reinforcing element 203 is disposed between the two longitudinal frame elements 201, and both ends of the reinforcing element 203 are respectively connected to the two longitudinal frame elements 201.

[0219] In some embodiments, the reinforcing element 203 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for insertion, snap-fitting or connection with other structural units (or elements) by bolts (groups).

[0220] The two ends of the reinforcing element 203 are respectively connected to positions between the first and second ends of the two longitudinal frame elements 201 (e.g., the 1 / 2, 1 / 3, and 2 / 3 positions of the longitudinal frame element 201), including but not limited to fixed connections and detachable connections, such as welding, integral molding, plug-in, snap-fit, and bolt (group) connections. For example, the reinforcing element 203 can be plugged into the longitudinal frame element 201 first, and then connected using bolts (groups) to improve the connection strength.

[0221] In some embodiments, there are multiple reinforcing elements 203. The multiple reinforcing elements 203 are spaced apart along the length direction of the longitudinal frame element 201.

[0222] In some of these embodiments, the reinforcing element 203 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0223] In some of these embodiments, the reinforcing element 203 includes, but is not limited to, reinforcing rods, reinforcing frames, reinforcing beams, etc.

[0224] like Figure 11 As shown, the handrail mechanism 300 includes two longitudinal handrail elements 301, a transverse handrail element 302, two second support elements 303, and a fifth connecting element 304. The two longitudinal handrail elements 301 are symmetrically arranged and are movably connected to their respective rotating mechanisms 100. The transverse handrail element 302 is positioned between the two longitudinal handrail elements 301, with both ends connected to the second ends of the two longitudinal handrail elements 301. The two second support elements 303 are positioned at the first ends of their respective longitudinal handrail elements 301 and are connected to the second wheel mechanism 500. The fifth connecting element 304 is positioned between the two second support elements 303, with both ends connected to the two second support elements 303, and is used to connect to the two rotating mechanisms 100 when the new trolley device is in four-wheel mode.

[0225] Specifically, the two longitudinal handrail elements 301 are slidably connected to the two inner sleeve elements 131 respectively; the fifth connecting element 304 is removably limited connected to the two first limiting elements 116 respectively.

[0226] In the case of the new trolley device being in two-wheel mode, the two longitudinal handrail elements 301 are located on the side of the corresponding longitudinal frame element 201; in the case of the new trolley device being in four-wheel mode, the two longitudinal handrail elements 301 are perpendicular to the corresponding longitudinal frame element 201.

[0227] In some embodiments, the longitudinal handrail element 301 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0228] In some of these embodiments, the longitudinal handrail element 301 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0229] In some of these embodiments, the longitudinal handrail element 301 includes, but is not limited to, a longitudinal handrail.

[0230] In some embodiments, the lateral handrail element 302 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0231] In some embodiments, the transverse handrail element 302 is U-shaped. Specifically, the transverse handrail element 302 includes a transverse handrail member and two longitudinal handrail members. The two longitudinal handrail members are respectively disposed at both ends of the transverse handrail member, and the bottom ends of the two longitudinal handrail members are respectively connected to the second end of the longitudinal handrail element 301.

[0232] The horizontal handrail element 302 is detachably connected to the vertical handrail element 301, including but not limited to plug-in, snap-fit, and bolt (group) connection. For example, the horizontal handrail element 302 can be plugged into the vertical handrail element 301 first, and then bolts (groups) can be used to connect them, which can improve the connection strength.

[0233] In some of the embodiments, at the connection position between the horizontal handrail element 302 and the vertical handrail element 301, there is an angle between the horizontal handrail element 302 and the vertical handrail element 301, where 90°≤the angle≤180°.

[0234] In some of these embodiments, the transverse handrail element 302 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0235] In some of these embodiments, the lateral handrail element 302 includes, but is not limited to, a lateral handrail.

[0236] In some embodiments, the second support element 303 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0237] In some embodiments, the second support element 303 is U-shaped. Specifically, the open end of the second support element 303 is connected to the first end of the longitudinal handrail element 301.

[0238] The second support element 303 is detachably connected to the longitudinal handrail element 301, including but not limited to plug-in, snap-in, and bolt (group) connections. For example, the second support element 303 can be plugged into the longitudinal handrail element 301 first, and then connected with bolts (groups) to improve the connection strength.

[0239] In some of these embodiments, the second support element 303 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0240] In some of these embodiments, the second support element 303 includes, but is not limited to, a mounting bracket.

[0241] The fifth connecting element 304 is detachably connected to the second support element 303, including but not limited to plug-in, snap-in, and bolt (group) connections. For example, the fifth connecting element 304 can be plugged into the second support element 303 first, and then connected using bolts (groups) to improve the connection strength.

[0242] In some of these embodiments, the fifth connecting element 304 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0243] In some of these embodiments, the fifth connecting element 304 includes, but is not limited to, a connecting rod, a connecting shaft, etc.

[0244] Furthermore, the handrail mechanism 300 also includes a plurality of fifth limiting elements 305. The plurality of fifth limiting elements 305 are respectively disposed on the corresponding longitudinal handrail elements 301, and are used to connect with the corresponding rotating mechanism 100 when the new trolley device is in two-wheel mode.

[0245] Specifically, a plurality of fifth limiting elements 305 are removably limited to the corresponding third limiting elements 125 and fourth limiting elements 134 respectively.

[0246] The fifth limiting element 305 is detachably connected to the longitudinal handrail element 301, including but not limited to plug-in, snap-in, bolt connection, etc.

[0247] The number of fifth limiting elements 305 matches the number of longitudinal handrail elements 301. Generally, the number of fifth limiting elements 305 is an integer multiple of the number of longitudinal handrail elements 301. That is, each longitudinal handrail element 301 is provided with at least one fifth limiting element 305.

[0248] When a plurality of fifth limiting elements 305 are provided in each longitudinal handrail element 301, the plurality of fifth limiting elements 305 are spaced apart along the width direction of the longitudinal handrail element 301.

[0249] The number of fifth limiting elements 305 matches the number of third limiting elements 125 (fourth limiting elements 134). Generally, the number of fifth limiting elements 305 = 2 of third limiting elements 125 (fourth limiting elements 134).

[0250] In this utility model, when the new trolley device is in two-wheel mode, the fifth limiting element 305 can be used to reduce the swaying of the longitudinal handrail element 301 and improve the stability of the longitudinal handrail element 301.

[0251] In some of these embodiments, the fifth limiting element 305 includes, but is not limited to, a limiting protrusion and a limiting bolt.

[0252] Furthermore, the handrail mechanism 300 also includes a plurality of sixth limiting elements 306. The plurality of sixth limiting elements 306 are respectively disposed on the corresponding second support elements 303, and are used to connect with the corresponding rotating mechanism 100 when the new trolley device is in four-wheel mode.

[0253] Specifically, several sixth limiting elements 306 are removably limited to their respective second limiting elements 117.

[0254] The sixth limiting element 306 is detachably connected to the second bracket element 303, including but not limited to plug-in, snap-in, bolt connection, etc.

[0255] The number of sixth limiting elements 306 matches the number of second support elements 303. Generally, the number of sixth limiting elements 306 is an integer multiple of the number of longitudinal handrail elements 301. That is, each second support element 303 is provided with at least one sixth limiting element 306.

[0256] When a plurality of sixth limiting elements 306 are provided in each second support element 303, the plurality of sixth limiting elements 306 are spaced apart along the width direction of the second support element 303.

[0257] The number of sixth limiting elements 306 matches the number of second limiting elements 117. Generally, the number of sixth limiting elements 306 = 2 * second limiting elements 117.

[0258] In some embodiments, the sixth limiting element 306 includes, but is not limited to, a limiting protrusion and a limiting bolt.

[0259] like Figure 12 As shown, the first wheel mechanism 400 includes two third support elements 401 and two first wheel elements 402. The two third support elements 401 are symmetrically arranged at the second end of the frame mechanism 200 and are respectively connected to the frame mechanism 200; the two first wheel elements 402 are respectively movably arranged on the corresponding third support elements 401 for movement.

[0260] Specifically, the two third bracket elements 401 are respectively disposed at the second end of the corresponding longitudinal frame element 201 and are respectively connected to the corresponding longitudinal frame element 201.

[0261] In some embodiments, the third support element 401 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0262] The third support element 401 is detachably connected to the longitudinal frame element 201, including but not limited to plug-in, snap-fit, and bolt (group) connections. For example, the third support element 401 can be plugged into the longitudinal frame element 201 first, and then connected using bolts (groups) to improve the connection strength.

[0263] In some of these embodiments, the third support element 401 includes, but is not limited to, a mounting bracket.

[0264] The first element 402 is movably connected to the third support element 401.

[0265] In some of these embodiments, the first wheel element 402 is a movable wheel, including but not limited to rubber wheels, PU foam wheels, etc.

[0266] Furthermore, the first wheel mechanism 400 also includes transmission elements 403. The two transmission elements 403 are respectively connected to the two first wheel elements 402.

[0267] Furthermore, the first wheel mechanism 400 also includes a transmission element 403. The transmission element 403 is connected to each of the two first wheel elements 402 for transmission.

[0268] In this invention, the transmission element 403 enables the two first wheel elements 402 to rotate simultaneously.

[0269] In some of these embodiments, the transmission element 403 includes, but is not limited to, a transmission shaft.

[0270] like Figure 13 As shown, the second wheel mechanism 500 includes two fourth support elements 501 and two second wheel elements 502. The two fourth support elements 501 are symmetrically arranged at the bottom end of the handrail mechanism 300 and are respectively connected to the handrail mechanism 300; the two second wheel elements 502 are respectively movably arranged on the corresponding fourth support elements 501 for movement.

[0271] Specifically, the two fourth support elements 501 are respectively disposed at the bottom end of the corresponding longitudinal handrail element 301 and are respectively connected to the corresponding longitudinal handrail element 301.

[0272] In some embodiments, the fourth support element 501 includes a connector and a first support element. The connector is inserted into the bottom end of the corresponding longitudinal handrail element 301; the top end of the first support element is rotatably connected to the bottom end of the connector and is movably connected to the corresponding second wheel element 502.

[0273] In this invention, the direction of movement of the second wheel element 502 can be changed by using this method.

[0274] In some of these embodiments, the fourth support element 501 includes, but is not limited to, a mounting bracket.

[0275] The dimensions of the second wheel element 502 are matched with the dimensions of the first wheel element 402. Generally, the radial dimension (e.g., wheel diameter) of the second wheel element 502 is not greater than the radial dimension (e.g., wheel diameter) of the first wheel element 402.

[0276] Preferably, the radial dimension (e.g., wheel diameter) of the second wheel element 502 is smaller than the radial dimension (e.g., wheel diameter) of the first wheel element 402.

[0277] In some embodiments, the second wheel element 502 is a movable wheel, including but not limited to rubber wheels, PU foam wheels, etc.

[0278] Furthermore, the second wheel mechanism 500 also includes two braking elements 503. The two braking elements 503 are respectively movably disposed on the corresponding fourth bracket element 501, and are used to lock or unlock the corresponding second wheel element 502.

[0279] When the brake element 503 is in the locked position, the second wheel element 502 cannot rotate relative to the fourth support element 501; when the brake element 503 is in the unlocked position, the second wheel element 502 can rotate relative to the fourth support element 501.

[0280] In some embodiments, the braking element 503 includes, but is not limited to, a lever-type braking structure. It should be noted that the braking element 503 is prior art and will not be described further here.

[0281] Furthermore, the new trolley device also includes a locking mechanism 600. The locking mechanism 600 is disposed on the frame mechanism 200 and is removably locked to the handle mechanism 300, and is used to lock the handle mechanism 300 and unlock the handle mechanism 300 to allow the handle mechanism 300 to move relative to the frame mechanism 200 when the new trolley device is in two-wheel mode.

[0282] like Figures 14-15 As shown, the locking mechanism 600 includes two fifth support elements 601, two seventh limiting elements 602, a first control element 603, two second control elements 604, and two locking elements 605. The two fifth support elements 601 are symmetrically arranged on the frame mechanism 200; the two seventh limiting elements 602 are respectively disposed on the corresponding fifth support elements 601, for connecting to the handrail mechanism 300 when the new trolley device is in two-wheel mode; the first control element 603 is movably disposed between the two fifth support elements 601; the two second control elements 604 are respectively movably disposed on the corresponding fifth support elements 601 and respectively connected to both ends of the first control element 603, for rotating under the action of the first control element 603; the two locking elements 605 are respectively movably disposed on the corresponding fifth support elements 601 and respectively contact the corresponding second control elements 604, and are removably locked to the handrail mechanism 300, for locking the handrail mechanism 300 and releasing the handrail mechanism 300 under the action of the second control element 604.

[0283] Specifically, the two fifth bracket elements 601 are respectively disposed on the corresponding longitudinal frame elements 201 and respectively connected to the corresponding longitudinal frame elements 201; the two seventh limiting elements 602 are respectively removably limited connected to the fifth connecting element 304; the two locking elements 605 are respectively removably locked connected to the fifth connecting element 304, for locking the fifth connecting element 304 or releasing the fifth connecting element 304.

[0284] In some embodiments, the fifth support element 601 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0285] The fifth bracket element 601 is detachably connected to the longitudinal frame element 201, including but not limited to plug-in, snap-fit, and bolt (group) connections. For example, the fifth bracket element 601 can be plugged into the longitudinal frame element 201 first, and then connected using bolts (groups) to improve the connection strength.

[0286] In some embodiments, the fifth support element 601 is U-shaped. Specifically, the open end of the fifth support element 601 is inserted into the longitudinal frame element 201.

[0287] In some of these embodiments, the fifth support element 601 includes, but is not limited to, a mounting bracket.

[0288] The seventh limiting element 602 is set through the fifth support element 601.

[0289] In some of these embodiments, the seventh limiting element 602 includes, but is not limited to, a limiting groove.

[0290] The first control element 603 is rotatably connected to the two fifth support elements 601 respectively.

[0291] In some embodiments, the first control element 603 includes a first control member and two second control members. The first control member is movably disposed between the two fifth support elements 601; the two second control members are respectively disposed at both ends of the first control member and are rotatably connected to the corresponding fifth support element 601 and plugged into the corresponding second control element 604, for driving the corresponding second control element 604 to rotate under the action of the first control member.

[0292] In some of these embodiments, the first control element has a circular cross-section.

[0293] In some embodiments, the cross-section of the second control member is non-circular. Specifically, at least a portion of the outer edge surface of the second control member is not coplanar with at least a portion of the outer edge surface of the first control member. For example, the second control member and the first control member form a convex structure or an L-shaped structure.

[0294] In some of these embodiments, the first control element 603 includes, but is not limited to, a joystick, a control shaft, etc.

[0295] Two second control elements 604 are respectively movably disposed inside the corresponding fifth support element 601. For example, the second control element 604 can be connected to the fifth support element 601 via a rotating shaft (or a similar structure), or the second control element 604 can rotate following the first control element 603.

[0296] Furthermore, the two second control elements 604 can also be connected to the fifth support element 601 via a reset structure (such as a torsion spring). This reset structure is prior art and will not be described in detail here.

[0297] In some of these embodiments, the second control element 604 is U-shaped.

[0298] In some embodiments, the second control element 604 includes a third control member and a protrusion. The third control member is inserted into the second control member of the first control element 603 and is used to rotate under the action of the second control member. The protrusion is disposed on the side of the third control member and abuts against the corresponding locking element 605, and is used to follow the rotation of the second control member to drive the corresponding locking element 605 to move upward or downward.

[0299] In some embodiments, there may be one or two protrusions. The two protrusions are symmetrically arranged and abut against the locking element 605 respectively.

[0300] In some of these embodiments, the second control element 604 includes, but is not limited to, a control bracket.

[0301] Two locking elements 605 are movably disposed inside the corresponding fifth support element 601. For example, the locking element 605 can be connected to the fifth support element 601 via a rotating shaft (or a similar structure).

[0302] In some of these embodiments, the locking element 605 is U-shaped.

[0303] In some embodiments, the locking element 605 includes a second support member and a recessed member. The second support member is rotatably disposed inside the corresponding fifth support member 601; the recessed member is disposed on the side of the second support member and abuts against the protrusion of the second control element 604, and is removably locked to the fifth connecting element 304, for rotating the second support member under the action of the protrusion to lock or release the fifth connecting element 304.

[0304] In some embodiments, there may be one or two recessed members. The two recessed members are symmetrically arranged and abut against the protrusions of the second control element 604, respectively.

[0305] In some of these embodiments, the locking element 605 includes, but is not limited to, a locking bracket.

[0306] Furthermore, the locking mechanism 600 also includes a third control element. The third control element is connected to the first control element 603 and is used to control the first control element 603.

[0307] The third control element is fixedly connected to the first control element 603 or detachably connected, including but not limited to plug-in, snap-fit, bolt (group) connection, etc.

[0308] In some embodiments, the third control element includes, but is not limited to, a control panel, a control handle, etc.

[0309] In this invention, the third control element can be used to form the operating arm or operating platform of the first control element 603, making it convenient for the user to apply force to the first control element 603.

[0310] Furthermore, the new trolley device also includes a baffle mechanism 700. The baffle mechanism 700 is disposed at the second end of the frame mechanism 200 and is used to place items when the new trolley device is in two-wheel mode.

[0311] Specifically, the baffle mechanism 700 is connected to the second end of each of the two longitudinal frame elements 201.

[0312] In some embodiments, the baffle mechanism 700 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or components) by bolts (groups).

[0313] The baffle mechanism 700 is detachably connected to the longitudinal frame element 201, including but not limited to plug-in, snap-in, and bolt (group) connections. For example, the baffle mechanism 700 can be plugged into the longitudinal frame element 201 first, and then connected using bolts (groups), which can improve the connection strength.

[0314] In some embodiments, the baffle mechanism 700 includes, but is not limited to, a baffle, a shelf, etc.

[0315] Furthermore, the new trolley device also includes at least one fixing mechanism 800. The fixing mechanism 800 is disposed on the frame mechanism 200 and is used for detachable connection with the stacking boxes.

[0316] In some embodiments, there are multiple fixing mechanisms 800. The multiple fixing mechanisms 800 are arranged sequentially along the length of the frame mechanism 200.

[0317] In some of these embodiments, two adjacent fixing mechanisms 800 may abut or be spaced apart.

[0318] like Figure 16As shown, the fixing mechanism 800 includes two fixing elements 801, a plurality of recessed elements 802, and a plurality of protruding elements 803. The two fixing elements 801 are symmetrically arranged on both sides of the frame mechanism 200; the plurality of recessed elements 802 are respectively disposed on the corresponding fixing elements 801 and connected to both sides of the stacking box; the plurality of protruding elements 803 are respectively disposed on the corresponding fixing elements 801, located on the side of the corresponding recessed elements 802, and connected to both sides of the stacking box.

[0319] Specifically, the two fixing elements 801 are respectively disposed on the corresponding longitudinal frame elements 201.

[0320] The fixing element 801 is detachably connected to the longitudinal frame element 201, including but not limited to plug-in, snap-in, and bolt (group) connections. For example, the fixing element 801 can be plugged into the longitudinal frame element 201 first, and then connected with bolts (groups) to improve the connection strength.

[0321] In some embodiments, the fixing element 801 includes a longitudinal fixing member and a transverse fixing member. The longitudinal fixing member is located on the side of the longitudinal frame element 201 (generally the side of the longitudinal frame element 201 facing another longitudinal frame element 201), and the longitudinal fixing member is provided with a protruding element 803; the transverse fixing member is disposed at the top of the longitudinal fixing member and is located at the top of the longitudinal frame element 201, and the transverse fixing member is provided with a recessed element 802.

[0322] In addition, the lateral fastener may also be provided with a protruding element 803.

[0323] At least one of the longitudinal fastener and the transverse fastener is connected to the longitudinal frame element 201.

[0324] In some of these embodiments, the fixing element 801 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0325] In some of these embodiments, the fixing element 801 includes, but is not limited to, a fixing base, a fixing bracket, etc.

[0326] The recessed element 802 may be installed through the fixing element 801 (lateral fixing member) or may not be installed through the fixing element 801 (lateral fixing member).

[0327] The number of recessed elements 802 matches the number of fixing elements 801. Generally, the number of recessed elements 802 is an integer multiple of the number of fixing elements 801. That is, each fixing element 801 is provided with at least one recessed element 802.

[0328] When each fixing element 801 is provided with a plurality of recessed elements 802, the plurality of recessed elements 802 are spaced apart along the length direction of the fixing element 801.

[0329] There is a gap between two adjacent recessed elements 802.

[0330] In some of these embodiments, the recessed element 802 includes, but is not limited to, mounting grooves, insertion grooves, snap-fit ​​grooves, etc.

[0331] The protruding element 803 and the fixed element 801 are integrally formed.

[0332] The number of protruding elements 803 matches the number of fixing elements 801. Generally, the number of protruding elements 803 is an integer multiple of the number of fixing elements 801. That is, each fixing element 801 is provided with at least one protruding element 803.

[0333] When each fixing element 801 is provided with a plurality of protruding elements 803, the plurality of protruding elements 803 are spaced apart along the length direction of the fixing element 801.

[0334] The number of protruding elements 803 matches the number of recessed elements 802. Generally, the number of protruding elements 803 is equal to the number of recessed elements 802.

[0335] There is a gap between two adjacent protruding elements 803.

[0336] In some of these embodiments, the protruding element 803 includes, but is not limited to, mounting protrusions, plug-in protrusions, snap-fit ​​protrusions, etc.

[0337] The method of using this utility model is as follows:

[0338] (I) Two-wheel mode

[0339] When the new trolley device is in two-wheel mode, the items to be transported are placed on the baffle mechanism 700 and then moved by the first wheel mechanism 400 (i.e., the two first wheel elements 402);

[0340] (II) Two-wheel mode → Four-wheel mode

[0341] Operating the first control element 603 (for example, pressing the third control element to make the first control element 603 rotate) causes the two second control elements 604 to rotate counterclockwise, causing the two locking elements 605 to rotate clockwise, thereby changing the groove of the two locking elements 605 from being perpendicular to the seventh limiting element 602 to being parallel to the seventh limiting element 602, so that the fifth connecting element 304 can be separated from the locking element 605 and the seventh limiting element 602;

[0342] The horizontal handrail element 302 is operated, and the two longitudinal handrail elements 301 and the two inner sleeve elements 131 drive the two outer sleeve elements 121 to rotate relative to the two first support elements 111 until the two outer sleeve elements 121 respectively abut against the first longitudinal positioning surface of the corresponding first positioning element 114 and the second longitudinal positioning surface of the second positioning element 115.

[0343] Under the combined action of the frame mechanism 200's own weight and the lateral handrail element 302, the two longitudinal handrail elements 301 slide against the corresponding inner sleeve element 131 respectively.

[0344] With the frame mechanism 200 parallel to the horizontal plane, the fifth connecting element 304 is respectively limited to the two first limiting elements 116, and several sixth limiting elements 306 are respectively limited to the corresponding second limiting elements 117. At this time, the new trolley device is in four-wheel mode.

[0345] The stacking box is placed on the fixing mechanism 800, and the stacking box cooperates with the recessed element 802 and the protruding element 803 located on both sides of it to achieve the effect of fixing the stacking box to the frame mechanism 200.

[0346] Movement is achieved through the cooperation of the first wheel mechanism 400 (i.e., two first wheel elements 402) and the second wheel mechanism 500 (i.e., two second wheel elements 502);

[0347] The stopping operation can be completed by operating the brake element 503 without moving the vehicle.

[0348] (III) Four-wheel mode → Two-wheel mode

[0349] The transverse frame element 202 is operated (lifted upwards) so that the fifth connecting element 304 is separated from the two first limiting elements 116 respectively, and the several sixth limiting elements 306 are separated from the corresponding second limiting elements 117 respectively.

[0350] Continue operating on the transverse frame element 202 (lift it upwards), and drive the two first support elements 111 to rotate relative to the two outer tube elements 121 through the two longitudinal frame elements 201;

[0351] Continue operating the transverse frame element 202 (lift it upwards), and drive the two longitudinal frame elements 201, the two first support elements 111, and the two outer sleeve elements 121 to slide the two inner sleeve elements 131 with the corresponding longitudinal handrail elements 301 respectively, until the several fifth limiting elements 305 are respectively limited and connected to the corresponding third limiting element 125 and the corresponding fourth limiting element 134.

[0352] Continue operating the transverse frame element 202 (lifting it upwards) and / or the transverse handrail element 302 until the two outer sleeve elements 121 respectively abut against the first transverse positioning surface of the corresponding first positioning element 114 and the second transverse positioning surface of the second positioning element 115.

[0353] At this time, the frame mechanism 200 is perpendicular to the horizontal plane, the first wheel mechanism 400 is in contact with the ground, and the second wheel mechanism 500 is suspended in the air;

[0354] Operating the first control element 603 (e.g., pressing the third control element to rotate the first control element 603) causes the two second control elements 604 to rotate counterclockwise, causing the two locking elements 605 to rotate clockwise, thereby changing the groove of the two locking elements 605 from being perpendicular to the seventh limiting element 602 to being parallel to the seventh limiting element 602, so that the fifth connecting element 304 enters the locking element 605 through the seventh limiting element 602;

[0355] By operating the first control element 603 (or using the reset structure), the two second control elements 604 are rotated clockwise, causing the two locking elements 605 to rotate counterclockwise. This causes the grooves of the two locking elements 605 to change from being parallel to the seventh limiting element 602 to being perpendicular to the seventh limiting element 602, thereby locking the fifth connecting element 304.

[0356] The technical effects of this utility model are as follows:

[0357] 1) Improve the rotation and sliding methods of the frame mechanism and handrail mechanism by using a rotating mechanism to increase service life, avoid shaking, and improve stability;

[0358] 2) The stacked boxes are secured by a fixing mechanism, which can effectively prevent the stacked boxes from jumping, tipping over and sliding during transportation;

[0359] 3) The stacking boxes can be quickly and easily fixed using a fixing mechanism. Through nested connection, the stacking boxes can be quickly installed and separated without the need for additional fixing ropes, binding ropes or other structures, resulting in a high degree of integration.

[0360] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotating mechanism for a handcart that can switch between a two-wheeled mode and a four-wheeled mode, characterized in that, include: A support unit is used to install at the end of the frame mechanism of a handcart; The outer tube unit is detachably connected to the support unit and is movably connected to the support unit, and is used to switch between two-wheel mode and four-wheel mode; The inner sleeve unit is detachably connected to the outer sleeve unit and is movably mounted at the end of the handrail mechanism of the trolley, and under the action of the handrail mechanism, drives the outer sleeve unit to switch between two-wheel mode and four-wheel mode.

2. The rotating mechanism according to claim 1, characterized in that, The support unit includes: The first support element is used to be mounted at the end of the frame mechanism of the handcart; A first rotating element is disposed on the first support element and is detachably and movably connected to the outer sleeve unit; An extension element is disposed at the bottom of the first support element; A first positioning element is disposed on the first support element and is used to limit the position of the outer tube unit; A second positioning element, disposed on the extension element, is used to limit the position of the outer sleeve unit; and / or The outer sleeve unit includes: An outer sleeve element is movably disposed on the side of the support unit, and an inner sleeve unit is removably disposed inside the outer sleeve element for switching between two-wheel mode and four-wheel mode following the inner sleeve unit; A second rotating element, disposed on the side of the outer sleeve element and detachably connected to the support unit, is used to rotate relative to the support unit under the action of the outer sleeve element; and / or The inner sleeve unit includes: An inner sleeve element is detachably connected to the outer sleeve unit, and is movably disposed at the end of the handrail mechanism of the trolley and drives the outer sleeve unit to switch between two-wheel mode and four-wheel mode under the action of the handrail mechanism.

3. The rotating mechanism according to claim 2, characterized in that, The support unit also includes: A first limiting element, disposed on the extension element, is used for a removable limiting connection with the handle mechanism of the trolley; and / or The support unit also includes: At least one second limiting element, disposed on the extension element, for removably limiting connection with the handrail mechanism of the trolley; and / or The outer sleeve unit also includes: At least one first connecting element, the first connecting element being disposed at the top end of the outer sleeve element and detachably connected to the inner sleeve unit; and / or The outer sleeve unit also includes: At least one second connecting element, the second connecting element being disposed at the bottom end of the outer sleeve element and detachably connected to the inner sleeve unit; and / or The outer sleeve unit also includes: At least one third limiting element, the third limiting element being disposed at the top end of the outer sleeve element, for limiting the position of the handrail mechanism of the trolley; and / or The inner sleeve unit also includes: At least one third connecting element, the third connecting element being disposed at the top end of the inner sleeve element and detachably connected to the outer sleeve unit; and / or The inner sleeve unit also includes: At least one fourth connecting element, the fourth connecting element being disposed at the bottom end of the inner sleeve element and detachably connected to the outer sleeve unit; and / or The inner sleeve unit also includes: At least one fourth limiting element is provided at the top of the inner sleeve element to limit the position of the handrail mechanism of the trolley.

4. A novel trolley device, characterized in that, include: Chassis mechanism; The armrest mechanism is movably connected to the frame mechanism and is used to switch between two-wheel mode and four-wheel mode in cooperation with the frame structure. The rotating mechanism as described in any one of claims 1 to 3 is disposed between the frame mechanism and the handrail mechanism, and is used to switch the handrail mechanism and the frame mechanism between a two-wheel mode and a four-wheel mode; The first wheel mechanism is located at the end of the frame mechanism and is used to move the new trolley device in two-wheel mode or four-wheel mode. The second wheel mechanism, located at the end of the armrest mechanism, is used for movement when the new trolley device is in four-wheel mode.

5. The novel trolley device according to claim 4, characterized in that, The chassis mechanism includes: Two longitudinal frame elements are symmetrically arranged. The first end of each of the two longitudinal frame elements is provided with a corresponding rotating mechanism, and the second end of each of the two longitudinal frame elements is provided with the first wheel mechanism. A transverse frame element, wherein the transverse frame element is disposed between the two longitudinal frame elements, and both ends of the transverse frame element are respectively connected to the two longitudinal frame elements; and / or The handrail mechanism includes: Two longitudinal handrail elements are symmetrically arranged, and each longitudinal handrail element is movably connected to the corresponding rotating mechanism. A transverse handrail element is disposed between two longitudinal handrail elements, and both ends of the transverse handrail element are respectively connected to the second ends of the two longitudinal handrail elements; Two second support elements are respectively disposed at the first end of the corresponding longitudinal handrail element and are respectively connected to the second wheel mechanism; A fifth connecting element, disposed between the two second support elements, with its two ends respectively connected to the two second support elements, is used to connect to the two rotating mechanisms when the novel trolley device is in four-wheel mode; and / or The first round mechanism includes: Two third support elements are symmetrically arranged at the second end of the frame mechanism and connected to the frame mechanism respectively; Two first wheel elements, each movably disposed on a corresponding third support element, are used for movement; and / or The second round mechanism includes: Two fourth support elements are symmetrically arranged at the bottom end of the handrail mechanism and are respectively connected to the handrail mechanism; Two second wheel elements are movably disposed on the corresponding fourth support elements for movement.

6. The novel trolley device according to claim 5, characterized in that, The chassis mechanism also includes: At least one reinforcing element is disposed between the two longitudinal frame elements, and both ends of the reinforcing element are respectively connected to the two longitudinal frame elements; and / or The handrail mechanism also includes: A plurality of fifth limiting elements, each of which is respectively disposed on a corresponding longitudinal armrest element, are used to connect with the corresponding rotating mechanism when the novel trolley device is in two-wheel mode; and / or The handrail mechanism also includes: A plurality of sixth limiting elements are respectively disposed on the corresponding second bracket elements, for connecting with the corresponding rotating mechanism when the new trolley device is in four-wheel mode.

7. The novel trolley device according to claim 5, characterized in that, The first round mechanism also includes: Transmission elements, the two transmission elements being respectively connected to the two first wheel elements; and / or The second round mechanism also includes: Two braking elements are respectively movably disposed on the corresponding fourth bracket element, for locking or unlocking the corresponding second wheel element.

8. The novel trolley device according to any one of claims 4 to 7, characterized in that, Also includes: A locking mechanism, disposed on the frame mechanism and removably locked to the armrest mechanism, is used to lock the armrest mechanism when the novel trolley device is in two-wheel mode and to unlock the armrest mechanism to allow relative movement between the armrest mechanism and the frame mechanism; and / or A baffle mechanism, disposed at the second end of the frame mechanism, is used to place items when the novel trolley device is in two-wheel mode; and / or At least one fixing mechanism is provided on the frame mechanism for detachable connection with the stacking box.

9. The novel trolley device according to claim 8, characterized in that, The locking mechanism includes: Two fifth support elements are symmetrically arranged on the frame mechanism; Two seventh limiting elements are respectively disposed on the corresponding fifth bracket elements, and are used to connect with the handrail mechanism when the new trolley device is in two-wheel mode; A first control element is movably disposed between the two fifth support elements; Two second control elements are respectively movably disposed on the corresponding fifth support element and respectively connected to both ends of the first control element, for rotating under the action of the first control element; Two second locking elements are movably disposed on the corresponding fifth support elements and respectively contact the corresponding second control elements, and are respectively removably locked to the handrail mechanism, for locking the handrail mechanism and releasing the handrail mechanism under the action of the second control elements.

10. The novel trolley device according to claim 9, characterized in that, The fixing mechanism includes: Two fixing elements are symmetrically arranged on both sides of the frame mechanism; A plurality of recessed elements are respectively disposed on the corresponding fixing elements and respectively connected to both sides of the stacking box; A plurality of protruding elements are respectively disposed on the corresponding fixed elements and located on the side of the corresponding recessed elements, and respectively connected to the two sides of the stacking box.

Images