Ramp and tractor

Abstract

The present application relates to a kind of boarding devices and tractor, boarding device includes: mounting bracket;Rotary assembly, rotatably mounted in mounting bracket, rotary assembly includes rotating mechanism and pedal unit, pedal unit rotatably mounted at the end of rotating mechanism away from mounting bracket;Rotary assembly rotatably switches between storage state and deployment state.The above-mentioned boarding device, rotating mechanism rotatably mounted in mounting bracket, when rotating mechanism and pedal unit are both rotated to first limit position towards mounting bracket, rotary assembly is in storage state, when rotating mechanism and pedal unit are both rotated to second limit position in the direction away from mounting bracket, rotary assembly is in deployment state.Such, it can be stored boarding device to save space when not in use, it can be quickly deployed to facilitate boarding when in use, the above-mentioned boarding device compact structure, the required installation space is small, can solve the problem that boarding device is arranged difficultly due to vehicle rear processor upgrade.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of commercial truck chassis, in particular to a boarding device and a tractor. BACKGROUND

[0002] With the rapid development of the automobile industry, the exhaust pollution of compression ignition and gaseous fuel ignition engine vehicles to the environment is also getting bigger and bigger, which has caused great influence on people's health.

[0003] Many vehicles on the market do not meet the national six emission standards, which makes it necessary to upgrade the vehicles to meet the national six emission standards, and the most important thing is the upgrade of the vehicle aftertreatment device. The upgrade of the vehicle aftertreatment device will cause great changes in the structure and size of the aftertreatment device, making it difficult to arrange the boarding ladder originally installed on the right side of the vehicle. SUMMARY

[0004] Therefore, it is necessary to provide a boarding device and a tractor which are convenient to assemble and arrange in view of the problem that the upgrade of the vehicle aftertreatment device causes difficulty in arranging the boarding ladder.

[0005] According to one aspect of the present application, a boarding device is provided, comprising:

[0006] a mounting bracket; and

[0007] a rotating assembly rotatably mounted to the mounting bracket, the rotating assembly comprising a rotating mechanism and a pedal unit, the pedal unit being rotatably mounted to one end of the rotating mechanism away from the mounting bracket;

[0008] wherein when the rotating assembly is rotated towards the mounting bracket to a first limit position, the rotating assembly is in a storage state, and when the rotating assembly is rotated away from the mounting bracket to a second limit position, the rotating assembly is in an unfolded state.

[0009] In one embodiment, the rotating mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod is rotatably connected to the mounting bracket, one end of the second connecting rod is rotatably connected to the mounting bracket, one end of the third connecting rod is rotatably connected to the other end of the second connecting rod, and the pedal unit is rotatably connected to the other end of the first connecting rod and the other end of the third connecting rod.

[0010] In one embodiment, the rotating assembly further comprises a first limiting piece mounted to the first connecting rod and located on the side of the first connecting rod close to the second connecting rod, and the first limiting piece is used to limit the rotation angle of the second connecting rod.

[0011] In one of the embodiments, the rotating assembly further comprises a second limiting member, which is installed on the third connecting rod and located at an end of the third connecting rod close to the pedal unit, and is used for limiting the rotating angle of the pedal unit.

[0012] In one of the embodiments, the rotating assembly further comprises a first locking assembly, which comprises a first locking part and a second locking part, the first locking part is installed on an end of the third connecting rod close to the second connecting rod, and the second locking part is installed on an end of the pedal unit away from the third connecting rod, when the rotating assembly is in the storage state, the second locking part can be clamped on the first locking part to lock the pedal unit.

[0013] In one of the embodiments, the first locking part is provided with a clamping cavity, the first locking part can be elastically deformed, and one end of the second locking part can extend into the clamping cavity.

[0014] In one of the embodiments, the rotating assembly further comprises a second locking assembly, which is installed on the mounting bracket, and can lock the second connecting rod when the rotating assembly is in the storage state.

[0015] In one of the embodiments, the second locking assembly comprises two installation plates arranged at intervals, a locking rod and a handle, opposite ends of the locking rod are respectively installed on the two installation plates, one end of the handle is rotatably installed on one of the installation plates, the other end of the handle is clamped on the other installation plate, a limiting cavity is defined between the locking rod and the handle, and the second connecting rod can be arranged in the limiting cavity.

[0016] In one of the embodiments, the mounting bracket comprises a first bracket and a second bracket, the first bracket and the second bracket are arranged at intervals, and an installation cavity is defined between the first bracket and the second bracket.

[0017] According to another aspect of the present application, a tractor is provided, which comprises the boarding device described above, and an end of the mounting bracket away from the rotating assembly is installed on the tractor.

[0018] The above-mentioned boarding device, the rotating mechanism is rotatably installed on the mounting bracket, the pedal unit is rotatably installed on the rotating mechanism, when the rotating mechanism and the pedal unit are both rotated to the first limit position towards the mounting bracket, the rotating assembly is in the storage state, when the rotating mechanism and the pedal unit are both rotated to the second limit position away from the mounting bracket, the rotating assembly is in the unfolded state, at this time, the driver can get on the vehicle through the pedal unit. In this way, the boarding device can be installed on the vehicle by installing the mounting bracket on the vehicle, and the boarding device can be stored to save space when not in use, and can be quickly unfolded for easy boarding when in use, convenient operation, and the boarding device has compact structure, small required installation space, and can solve the problem of difficult arrangement of the boarding device due to upgrading of the vehicle rear processor. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The assembly diagram of the boarding device of the present application in the storage state;

[0020] Figure 2 The assembly diagram of the boarding device of the present application in the unfolded state;

[0021] Figure 3 The connection diagram of the first limiting piece and the first connecting rod;

[0022] Figure 4 The structure diagram of the second connecting rod of the boarding device of the present application;

[0023] Figure 5 The connection diagram of the third connecting rod and the second limiting piece of the boarding device of the present application;

[0024] Figure 6 The structure diagram of the first rotating shaft assembly of the boarding device of the present application;

[0025] Figure 7 The structure diagram of the second rotating shaft assembly of the boarding device of the present application;

[0026] Figure 8 The structure diagram of the third rotating shaft assembly of the boarding device of the present application;

[0027] Figure 9 The structure diagram of the fourth rotating shaft assembly of the boarding device of the present application;

[0028] Figure 10 The structure diagram of the pedal unit of the boarding device of the present application;

[0029] Figure 11 The structure diagram of the first limiting piece of the boarding device of the present application;

[0030] Figure 12Enlarged schematic view of the limiting mode of the first limiting member of the boarding device of the present application;

[0031] Figure 13 Schematic view of the structure of the second limiting member of the boarding device of the present application;

[0032] Figure 14 Enlarged schematic view of the limiting mode of the second limiting member of the boarding device of the present application;

[0033] Figure 15 Schematic view of the structure of the first locking part of the first locking assembly of the boarding device of the present application;

[0034] Figure 16 Schematic view of the connection of the first locking part and the third connecting rod of the present application;

[0035] Figure 17 Schematic view of the structure of the second locking part of the first locking assembly of the boarding device of the present application;

[0036] Figure 18 Schematic view of the structure of the second locking assembly of the boarding device of the present application.

[0037] Explanation of the reference signs:

[0038] 10, loading device; 100, mounting bracket; 110, through hole; 120, mounting cavity; 130, first bracket; 140, second bracket; 200, rotating assembly; 210, rotating mechanism; 211, first connecting rod; 2111, first mounting hole; 2112, limiting hole; 212, second connecting rod; 2121, second mounting hole; 213, third connecting rod; 2131, third mounting hole; 2132, third connecting rod body; 2133, mounting lug; 214, first rotating shaft assembly; 2141, first rotating shaft body; 2142, first sleeve; 2143, first nut; 2144, first gasket; 215, second rotating shaft assembly; 2151, second rotating shaft body; 2152, second sleeve; 2153, second nut; 2154, second gasket; 216, third rotating shaft assembly; 2161, third rotating shaft body; 2162, third sleeve; 2163, third nut; 2164, third gasket; 217, fourth rotating shaft assembly; 2171, fourth rotating shaft body; 2172, fourth sleeve; 2173, fourth nut; 2174, fourth gasket; 220, pedal unit; 221, connecting hole; 222, vertical rod; 223, horizontal rod; 230, first limiting piece; 231, limiting bolt; 232, limiting sleeve; 233, limiting nut; 240, second limiting piece; 241, intermediate connecting section; 242, limiting section; 243, mounting section; 250, first locking assembly; 251, first locking part; 2511, clamping cavity; 2512, fastener; 252, second locking part; 2521, mounting part; 2522, clamping part; 260, second locking assembly; 261, mounting plate; 2611, clamping groove; 262, locking rod; 263, handle; 264, limiting cavity; 265, rotating piece. DETAILED DESCRIPTION

[0039] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these details. In other instances, well known process steps have not been described in detail in order to avoid unnecessarily obscuring the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The techniques employed herein are generally known in the art.

[0040] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0041] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] 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 between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0044] It is to be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0045] Referring to Figures 1-2 , Figure 1 An assembly view of the boarding device of the present application is shown in a stowed state, Figure 2 An assembly view of the boarding device of the present application is shown in a deployed state.

[0046] The present application provides a boarding device 10 for a vehicle, comprising a mounting bracket 100 and a rotating assembly 200, the rotating assembly 200 is rotatably mounted at an end of the mounting bracket 100 away from the vehicle, the rotating assembly 200 comprises a rotating mechanism 210 and a step unit 220, one end of the rotating mechanism 210 is rotatably mounted to the mounting bracket 100, the step unit 220 is rotatably mounted at an end of the rotating mechanism 210 away from the mounting bracket 100, the rotating mechanism 210 and the step unit 220 are rotatable towards the mounting bracket 100 to a first limit position so that the rotating assembly 200 is in a stowed state, and are rotatable away from the mounting bracket 100 to a second limit position so that the rotating assembly 200 is in a deployed state, the step unit 220 is used for stepping. In this way, the rotating assembly 200 can realize the switching between the stowed state and the deployed state through rotation, which is convenient for stowing, saves space, and the above-mentioned boarding device 10 has a compact structure, requires small installation space, and is convenient to arrange.

[0047] Continuing to refer to Figure 1 and Figure 2 , the mounting bracket 100 is generally in the shape of a "π" as a whole, the mounting bracket 100 is provided with a plurality of through holes 110 at intervals, the mounting bracket 100 is provided with a mounting cavity 120 with an open end along the length direction thereof, one end of the mounting bracket 100 away from the open end of the mounting cavity 120 is mounted to the vehicle, the other end of the mounting bracket 100 is used for mounting the rotating assembly 200, the rotating assembly 200 is rotatable relative to the mounting bracket 100, when the rotating assembly 200 rotates towards the mounting cavity 120, the rotating assembly 200 can be partially stowed in the mounting cavity 120, when the rotating assembly 200 rotates away from the mounting cavity 120, the rotating assembly 200 can be deployed for people to step on the vehicle. In this way, the nut connects the rotating assembly 200 and the vehicle through the through hole 110, the rotating assembly 200 can be partially accommodated in the mounting cavity 120 through rotation, which saves installation space.

[0048] In some embodiments, the mounting bracket 100 comprises a first bracket 130 and a second bracket 140 which are spaced apart and each in the shape of an "L", and a mounting cavity 120 is defined between the first bracket 130 and the second bracket 140. It can be understood that the spacing between the first bracket 130 and the second bracket 140 can be adjusted as required to meet the mounting requirements of the rotating assembly 200.

[0049] The rotating assembly 200 is rotatably mounted at an end of the mounting bracket 100 away from the vehicle, and comprises a rotating mechanism 210 and a pedal unit 220. One end of the rotating mechanism 210 is rotatably mounted to the mounting bracket 100, and the pedal unit 220 is rotatably mounted to an end of the rotating mechanism 210 away from the mounting bracket 100. In this way, by rotating the rotating mechanism 210 and the pedal unit 220 to a first limit position or a second limit position, the rotating assembly 200 can be switched between a stowed state and a deployed state.

[0050] Further referring to Figures 3-5 , Figure 3 a connection diagram of the first limit member and the first connecting rod of the present application is shown, Figure 4 a structure diagram of the second connecting rod of the boarding device of the present application is shown, Figure 5 a connection diagram of the third connecting rod and the second limit member of the boarding device of the present application is shown.

[0051] Specifically, the rotating mechanism 210 comprises a first connecting rod 211, a second connecting rod 212 and a third connecting rod 213. The first connecting rod 211, the second connecting rod 212 and the third connecting rod 213 are each in the shape of a hollow cuboid, and a plurality of first mounting holes 2111, a plurality of second mounting holes 2121 and a plurality of third mounting holes 2131 are respectively formed in the first connecting rod 211, the second connecting rod 212 and the third connecting rod 213. One end of the first connecting rod 211 is rotatably connected to the mounting bracket 100, one end of the second connecting rod 212 is rotatably connected to the mounting bracket 100, one end of the third connecting rod 213 is rotatably connected to the other end of the second connecting rod 212, and the pedal unit 220 is rotatably connected to the other end of the first connecting rod 211 and the other end of the third connecting rod 213. In this way, by rotating the first connecting rod 211, the second connecting rod 212, the third connecting rod 213 and the pedal unit 220, the rotating assembly 200 can be switched between a stowed state and a deployed state, facilitating stowage and use.

[0052] Further, the rotating mechanism 210 further comprises a first rotating shaft assembly 214, a second rotating shaft assembly 215, a third rotating shaft assembly 216 and a fourth rotating shaft assembly 217, each of which is generally in the shape of a solid of revolution. The first rotating shaft assembly 214 passes through the through hole 110 and the first mounting hole 2111 to connect the mounting bracket 100 and one end of the first connecting rod 211, the second rotating shaft assembly 215 passes through the through hole 110 and the second mounting hole 2121 to connect the mounting bracket 100 and one end of the second connecting rod 212, the third rotating shaft assembly 216 passes through the second mounting hole 2121 and the third mounting hole 2131 to connect the other end of the second connecting rod 212 and one end of the third connecting rod 213, and the fourth rotating shaft assembly 217 passes through the first mounting hole 2111, the third mounting hole 2131 and a connecting hole 221 of the pedal unit 220 to connect the other end of the first connecting rod 211, the other end of the third connecting rod 213 and the pedal unit 220. The first connecting rod 211 can rotate around the first rotating shaft assembly 214, the second connecting rod 212 can rotate around the second rotating shaft assembly 215, the pedal unit 220 can rotate around the third rotating shaft assembly 216, and the third connecting rod 213 can rotate around the fourth rotating shaft assembly 217.

[0053] In some embodiments, the rotating mechanism 210 further comprises a plurality of sleeves (not shown in the figure), each of the first mounting hole 2111, the second mounting hole 2121 and the third mounting hole 2131 is provided with a corresponding sleeve, the first rotating shaft assembly 214, the second rotating shaft assembly 215, the third rotating shaft assembly 216 and the fourth rotating shaft assembly 217 are partially inserted into the sleeves, and the sleeves are formed of resin. It can be understood that the rotating mechanism 210 does not necessarily have the sleeves, and the sleeves can be formed of other materials.

[0054] In this way, the rotating assembly 200 can be switched between the storage state and the unfolded state by rotating the first connecting rod 211, the second connecting rod 212, the third connecting rod 213 and the pedal unit 220, which is simple and fast, and the sleeves can increase the contact area and reduce the pressure.

[0055] Further referring to Figures 6-9 , Figure 6 a structure diagram of the first rotating shaft assembly of the boarding device is shown, Figure 7 a structure diagram of the second rotating shaft assembly of the boarding device is shown, Figure 8 a structure diagram of the third rotating shaft assembly of the boarding device is shown, Figure 9 a structure diagram of the fourth rotating shaft assembly of the boarding device is shown.

[0056] The first rotating shaft assembly 214 comprises a first rotating shaft body 2141, a first sleeve 2142, two first nuts 2143 and a plurality of first washers 2144. The first rotating shaft body 2141 is a cylindrical bolt, which is arranged through the mounting bracket 100 and the first connecting rod 211. The first sleeve 2142 is a polygonal prism, which is welded to the first rotating shaft body 2141 and located in the through hole 110 of the mounting bracket 100. The two first nuts 2143 are respectively arranged at two ends of the first rotating shaft body 2141. The plurality of first washers 2144 are arranged in intervals on the first rotating shaft body 2141, i.e., the first sleeve 2142, the first nuts 2143 and the first connecting rod 211 are all provided with the first washers 2144. Preferably, the first sleeve 2142 and the first washers 2144 are both formed of resin. In this way, the first sleeve 2142 can prevent the rotation of the first rotating shaft assembly 214, and can also increase the contact area and reduce the stress. The resin material can reduce friction, lower noise and buffer shock, and can avoid wear, noise and vibration of the rotating assembly 200 during rotation.

[0057] The second rotating shaft assembly 215 comprises a second rotating shaft body 2151, a second sleeve 2152, two second nuts 2153 and a plurality of second washers 2154. The second rotating shaft body 2151 is a cylindrical bolt, which is arranged through the mounting bracket 100 and the second connecting rod 212. The second sleeve 2152 is a polygonal prism, which is welded to the second rotating shaft body 2151 and located in the through hole 110 of the mounting bracket 100. The two second nuts 2153 are respectively arranged at two ends of the second rotating shaft body 2151. The plurality of second washers 2154 are arranged in intervals on the second rotating shaft body 2151, i.e., the second sleeve 2152, the second nuts 2153, the mounting bracket 100 and the second connecting rod 212 are all provided with the second washers 2154. Preferably, the second sleeve 2152 and the second washers 2154 are both formed of resin. In this way, the second sleeve 2152 can prevent the rotation of the second rotating shaft assembly 215, and the resin material can reduce friction, lower noise and buffer shock, and can also increase the contact area and reduce the stress, so as to avoid wear, noise and vibration of the rotating assembly 200 during rotation.

[0058] The third rotating shaft assembly 216 comprises a third rotating shaft body 2161, a third sleeve 2162, two third nuts 2163 and a plurality of third washers 2164. The third rotating shaft body 2161 is a cylindrical bolt, which is arranged through the first connecting rod 211, the third connecting rod 213 and the pedal unit 220. The third sleeve 2162 is a polygonal prism, which is welded to the third rotating shaft body 2161 and located in the first mounting hole 2111 of the first connecting rod 211. The two third nuts 2163 are respectively arranged at the two ends of the third rotating shaft body 2161. The plurality of third washers 2164 are arranged in the third rotating shaft body 2161 in a spaced manner, i.e., the third sleeve 2162, the third nuts 2163, the first connecting rod 211, the third connecting rod 213 and the pedal unit 220 are all provided with the third washers 2164. Preferably, the third sleeve 2162 and the third washers 2164 are both formed of resin. In this way, the third sleeve 2162 can prevent the rotation of the third rotating shaft assembly 216, and can also increase the contact area and reduce the stress. The resin material can reduce the friction, lower the noise and buffer the shock, so as to avoid the wear, noise and vibration of the rotating assembly 200 during rotation.

[0059] The fourth rotating shaft assembly 217 comprises a fourth rotating shaft body 2171, a fourth sleeve 2172, two fourth nuts 2173 and a plurality of fourth washers 2174. The fourth rotating shaft body 2171 is a cylindrical bolt, which is arranged through the third connecting rod 213 and the second connecting rod 212. The fourth sleeve 2172 is a polygonal prism, which is welded to the fourth rotating shaft body 2171 and located in the third mounting hole 2131 of the third connecting rod 213. The two fourth nuts 2173 are respectively arranged at the two ends of the fourth rotating shaft body 2171. The plurality of fourth washers 2174 are arranged in the fourth rotating shaft body 2171 in a spaced manner, i.e., the fourth sleeve 2172, the fourth nuts 2173, the third connecting rod 213 and the second connecting rod 212 are all provided with the fourth washers 2174. Preferably, the fourth sleeve 2172 and the fourth washers 2174 are both formed of resin. In this way, the fourth sleeve 2172 can prevent the rotation of the fourth rotating shaft assembly 217, and can also increase the contact area and reduce the stress. The resin material can reduce the friction, lower the noise and buffer the shock, so as to avoid the wear, noise and vibration of the rotating assembly 200 during rotation.

[0060] Further referring to Figure 10 , Figure 10 The structure of the pedal unit of the boarding device is shown.

[0061] The pedal unit 220 is a frame structure in the shape of a cuboid, and is provided with a connecting hole 221 through which the third rotating shaft assembly 216 is inserted to connect the pedal unit 220 and the rotating mechanism 210, and the pedal unit 220 can rotate around the third rotating shaft assembly 216. The pedal unit 220 comprises two longitudinal rods 222 and two transverse rods 223, the two longitudinal rods 222 are parallel and arranged at intervals, the two transverse rods 223 are parallel and arranged at intervals, and the two transverse rods 223 are respectively installed on the opposite ends of the two longitudinal rods 222 along the length direction. Among them, the two transverse rods 223 are used as pedals. In this way, rotating the pedal unit 220 can stow or unfold the pedal unit 220, save space, and be convenient to use.

[0062] Further referring to Figure 11 、 Figure 12 and Figure 3 , Figure 11 Fig. 1 shows a structure diagram of a first limiting piece of the boarding device, Figure 12 Fig. 2 shows an enlarged diagram of a limiting mode of the first limiting piece of the boarding device.

[0063] In some embodiments, the rotating assembly 200 further comprises a first limiting piece 230, which is in the shape of a rotary body, is installed on the first connecting rod 211 and is located on the side of the first connecting rod 211 close to the second connecting rod 212, and is used to limit the rotating angle of the second connecting rod 212. Specifically, the first limiting piece 230 comprises a limiting bolt 231, a limiting sleeve 232 and a limiting nut 233, the limiting sleeve 232 is welded on the limiting bolt 231, the middle part of the first connecting rod 211 is provided with a limiting hole 2112, the limiting hole 2112 is in the shape of a cone, that is, the hole diameter of the limiting hole 2112 gradually increases along the length direction from the side close to the second bracket 140 to the side close to the second connecting rod 212, the limiting sleeve 232 is inserted into the limiting hole 2112, and the limiting nut 233 is installed on the end of the limiting bolt 231 close to the second connecting rod 212. Preferably, the limiting sleeve 232 is formed of resin. In this way, the first limiting piece 230 can be clamped in the limiting hole 2112 in the shape of a cone, the resin material can reduce friction, noise and buffering and shock, the limiting sleeve 232 can increase the contact area and reduce stress, when the rotating assembly 200 is in the unfolded state (see Fig. 1), the first limiting piece 230 can limit the rotating angle of the second connecting rod 212, so as to avoid that the angle of the second connecting rod 212 is too large and the pedal unit 220 is too far away from the door. Figure 2

[0064] Further referring to Figure 13 、 Figure 14 and Figure 5 , Figure 13 Fig. 3 shows a structure diagram of a second limiting piece of the boarding device, Figure 14 ​An enlarged schematic diagram of the limiting method of the second limiting member of the boarding device of the present invention is shown.

[0065] In some embodiments, the rotating assembly 200 further includes a second limiting member 240, which is mounted on the third link 213 and located at one end of the third link 213 near the pedal unit 220. The second limiting member 240 is used to limit the rotation angle of the pedal unit 220. Specifically, the second limiting member 240 is generally in the shape of a "Z", including a middle connecting section 241 and limiting sections 242 and mounting sections 243 located at opposite ends of the middle connecting section 241 and extending in opposite directions. The mounting section 243 is mounted on one end of the third link 213 near the pedal unit 220, and the limiting section 242 is used to limit the rotation of the pedal unit 220. Thus, when the pedal unit 220 is in the unfolded state (see Appendix), Figure 2 The second limiting member 240 can limit the rotation angle of the pedal unit 220, preventing the pedal unit 220 from rotating to a vertical state, which would make it inconvenient to step on the pedal to get on the vehicle.

[0066] Please refer to the following: Figures 15-17 and Figure 10 , Figure 15 A schematic diagram of the structure of the first locking part of the first locking assembly of the boarding device of the present invention is shown. Figure 16 A schematic diagram showing the connection between the first locking part and the third connecting rod of the present invention is shown. Figure 17 A schematic diagram of the structure of the second locking part of the first locking assembly of the boarding device of the present invention is shown, and a schematic diagram of the connection between the second locking part and the pedal unit of the present invention is shown.

[0067] In some embodiments, the rotating assembly 200 further includes a first locking component 250, which includes a first locking portion 251 and a second locking portion 252. The first locking portion 251 is mounted on the end of the third link 213 near the second link 212, and the second locking portion 252 is mounted on the end of the pedal unit 220 away from the third link 213. When the rotating assembly 200 is in the retracted state (see attached figure) Figure 1), the second locking portion 252 can extend into the first locking portion 251 and be clamped with the first locking portion 251 to lock the pedal unit 220. Specifically, the first locking portion 251 is substantially in the shape of a "U" and is provided with a clamping cavity 2511 which penetrates the first locking portion 251 along the length direction of the first locking portion 251, the width dimension of the clamping cavity 2511 gradually decreases from the side close to the mounting lug plate 2133 to the side away from the mounting lug plate 2133 and then gradually increases, the third connecting rod 213 comprises a third connecting rod body 2132 and a mounting lug plate 2133, the mounting lug plate 2133 is connected to the end side of the third connecting rod body 2132 away from the pedal unit 220, the first locking portion 251 is mounted to the side of the mounting lug plate 2133 away from the mounting bracket 100 through a fastener 2512, and the first locking portion 251 can be elastically deformed. One end of the second locking portion 252 can extend into the clamping cavity 2511, the second locking portion 252 comprises a mounting portion 2521 and a clamping portion 2522, the mounting portion 2521 is substantially in the shape of a cuboid and is mounted to the end of the pedal unit 220 away from the third connecting rod 213 and close to the third connecting rod 213, the clamping portion 2522 is connectable to the mounting portion 2521 through a fastener, the diameter dimension of the end of the clamping portion 2522 away from the mounting portion 2521 gradually increases from the side close to the mounting portion 2521 to the side away from the mounting portion 2521 and then gradually decreases, and the clamping portion 2522 can extend into the clamping cavity 2511 and be clamped with the first locking portion 251.

[0068] Thus, when the rotating assembly 200 is in the storage state, the clamping portion 2522 can be clamped in the clamping cavity 2511, thereby fixing the pedal unit 220 to the first locking assembly 250 and avoiding the rotation of the pedal unit 220 during the driving of the vehicle.

[0069] Further referring to Figure 18 and Figure 1 , Figure 18 a structure diagram of the second locking assembly of the boarding device is shown.

[0070] In some embodiments, the rotating assembly 200 further comprises a second locking assembly 260 mounted on the mounting bracket 100 and located in the mounting cavity 120, which can lock the second connecting rod 212 when the rotating assembly 200 is in the storage state. Specifically, the second locking assembly 260 comprises two spaced mounting plates 261, a locking rod 262 and a handle 263, the two mounting plates 261 are respectively mounted on the first bracket 130 and the second bracket 140 and are located in the mounting cavity 120, the opposite ends of the locking rod 262 are respectively mounted on the two mounting plates 261, one end of the handle 263 is rotatably mounted on one of the mounting plates 261 through a rotating piece 265, the other end of the handle 263 is clamped in the clamping groove 2611 of the other mounting plate 261, and the locking rod 262 and the handle 263 define a limiting cavity 264 therebetween, and the second connecting rod 212 can be arranged in the limiting cavity 264. In this way, when the rotating assembly 200 is in the storage state, the second connecting rod 212 is arranged in the limiting cavity 264, so that the rotation of the second connecting rod 212 is avoided, and the stability of the rotating assembly 200 is improved.

[0071] The present application also provides a towing vehicle (not shown in the figure) comprising the boarding device 10 described above, and the end of the mounting bracket 100 away from the rotating assembly 200 is mounted at the right side door of the towing vehicle. In this way, the boarding device 10 can be stored or unfolded as needed, saving installation space and facilitating use.

[0072] In summary, the present application provides a boarding device 10 and a towing vehicle, the rotating mechanism 210 can rotate relative to the mounting bracket 100, and the pedal unit 220 can rotate relative to the rotating mechanism 210, thereby realizing the switching of the rotating assembly 200 between the storage state and the unfolded state; when the rotating assembly 200 is in the unfolded state, the first limiting piece 230 can limit the rotation angle of the second connecting rod 212, so as to avoid the pedal unit 220 being too far away from the door due to too large rotation angle of the second connecting rod 212; when the rotating assembly 200 is in the unfolded state, the second limiting piece 240 can limit the rotation angle of the pedal unit 220, so as to avoid the pedal unit 220 being inconvenient to step on due to being rotated to the vertical state; when the rotating assembly 200 is in the storage state, the second locking part 252 of the first locking assembly 250 can extend into the first locking part 251 and be clamped with the first locking part 251 to lock the pedal unit 220, so as to avoid the pedal unit 220 being rotated during the driving of the vehicle; when the rotating assembly 200 is in the storage state, the second connecting rod 212 can be arranged in the limiting cavity 264 formed by the second locking assembly 260, so as to avoid the rotation of the second connecting rod 212 and improve the stability of the rotating assembly 200.

[0073] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered within the scope of the present disclosure.

[0074] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It shall be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. A boarding device, characterized in that, The utility model relates to a folding device for a towing vehicle, comprising: a mounting bracket; and a rotating assembly rotatably mounted on the mounting bracket, the rotating assembly comprising a rotating mechanism and a pedal unit rotatably mounted on the rotating mechanism at an end away from the mounting bracket; wherein, when the rotating assembly is rotated towards the mounting bracket to a first limit position, the rotating assembly is in a folded state, and when the rotating assembly is rotated away from the mounting bracket to a second limit position, the rotating assembly is in an unfolded state; the rotating mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod is rotatably connected to the mounting bracket, one end of the second connecting rod is rotatably connected to the mounting bracket, one end of the third connecting rod is rotatably connected to the other end of the second connecting rod, and the pedal unit is rotatably connected to the other end of the first connecting rod and the other end of the third connecting rod; the rotating assembly further comprises a first locking assembly, the first locking assembly comprising a first locking part and a second locking part, the first locking part being mounted on the third connecting rod at an end close to the second connecting rod, and the second locking part being mounted on the pedal unit at an end away from the third connecting rod, the second locking part being capable of being clamped on the first locking part to lock the pedal unit when the rotating assembly is in the folded state.

2. The loading dock leveler according to Claim 1, wherein, the rotating assembly further comprises a first limiting piece mounted on the first connecting rod at a side close to the second connecting rod, the first limiting piece being used to limit the rotation angle of the second connecting rod.

3. The loading dock leveler according to Claim 1, wherein, the rotating assembly further comprises a second limiting piece mounted on the third connecting rod at an end close to the pedal unit, the second limiting piece being used to limit the rotation angle of the pedal unit.

4. The loading dock leveler according to Claim 1, wherein, the first locking part is provided with a clamping cavity, the first locking part is capable of being elastically deformed, and one end of the second locking part can extend into the clamping cavity.

5. The loading dock leveler according to Claim 1, wherein, the rotating assembly further comprises a second locking assembly mounted on the mounting bracket, the second locking assembly being capable of locking the second connecting rod when the rotating assembly is in the folded state.

6. The loading dock leveler according to Claim 5, wherein, the second locking assembly comprises two mounting plates arranged at intervals, a locking rod and a handle, opposite ends of the locking rod are respectively mounted on the two mounting plates, one end of the handle is rotatably mounted on one of the mounting plates, the other end of the handle is clamped on the other mounting plate, a limiting cavity is defined between the locking rod and the handle, and the second connecting rod can be arranged in the limiting cavity.

7. The loading dock leveler according to Claim 1, wherein, the mounting bracket comprises a first bracket and a second bracket, the first bracket and the second bracket are arranged at intervals, and an installation cavity is defined between the first bracket and the second bracket.

8. A towing vehicle characterized in that the utility model relates to a folding device for a towing vehicle, the mounting bracket being mounted on the towing vehicle at an end away from the rotating assembly.

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