Cabin door telescopic drawstring device and vehicle with same

Abstract

The utility model provides a cabin door telescopic drawstring device which comprises a hydraulic cylinder assembly, the hydraulic cylinder assembly comprises a hydraulic cylinder and a piston, the hydraulic cylinder is provided with a containing cavity for containing hydraulic oil, the first end of the hydraulic cylinder is connected with a cabin door, the second end of the hydraulic cylinder is provided with a first through hole, the piston comprises a base and a limiting column, and the base is connected with the limiting column. A hydraulic cylinder assembly and a motor assembly which are connected with a cabin door are arranged, the hydraulic cylinder assembly comprises a hydraulic cylinder and a piston, a compression cylinder is provided with a containing cavity, and a motor cylinder body drives a drawstring to be converted into a stretching state from a curling state and enables hydraulic oil to flow into a first cavity from a first oil pipe, so that the drawstring is automatically in the stretching state when the cabin door is opened; when the cabin door is too high, an operator can directly pull the pull belt to close the cabin door, the cabin door does not need to be closed through dangerous behaviors such as climbing, the safety of the operator is guaranteed, and the cabin door is more convenient to open and close.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a door telescopic pull belt device and a vehicle having the same. Background Art

[0002] For buses with two doors on the rear or with doors at a high position, the doors need to be closed manually by standing on a stool or ladder; and it takes a lot of strength to close them, which poses a safety hazard. The existing door drawstrings are inconvenient to use and cannot be automatically extended or retracted. Utility Model Content

[0003] The main purpose of the utility model is to provide a hatch door telescopic pull strap device and a vehicle having the same, so as to solve the problem of inconvenience in closing the hatch door in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a door telescopic drawstring device is provided, including: a hydraulic cylinder assembly, the hydraulic cylinder assembly includes a hydraulic cylinder and a piston, the hydraulic cylinder has a accommodating chamber for accommodating hydraulic oil, the first end of the hydraulic cylinder is connected to the door, the second end of the hydraulic cylinder is provided with a first through hole, the piston includes a base and a limiting column, the base is connected to the limiting column, the base is arranged in the accommodating chamber to divide the accommodating chamber into a first cavity and a second cavity, part of the limiting column extends to the outside of the hydraulic cylinder through the first through hole, the base has a first working position close to the first end of the hydraulic cylinder, the base has a second working position close to the second end of the hydraulic cylinder, when the base is in the first working position When the base is in the working position, the hatch is in the closed position, and when the base is in the second working position, the hatch is in the open position; a motor assembly, the motor assembly is connected to the hatch, the motor assembly includes a motor cylinder and a drawstring, the motor cylinder has an oil storage chamber, a motor gear is provided in the oil storage chamber, the motor gear drives the drawstring to extend and retract, when the base is in the second working position, the drawstring is in a stretched state, and when the base is in the first working position, the drawstring is in a retracted state; wherein, the first cavity has a first oil port, the second cavity has a second oil port, a third oil port and a fourth oil port are provided in the oil storage chamber, the first oil port is connected to the third oil port through a first oil pipe, and the second oil port is connected to the fourth oil port through a second oil pipe.

[0005] Further, the hydraulic cylinder includes: a cylinder body, the cylinder body is provided with a receiving groove with an opening, a first protrusion is provided on the side wall of the cylinder body, a plurality of first connecting holes are provided on the first protrusion, and the cylinder body is connected to the hatch through a connecting piece passing through the first connecting holes; a hydraulic cover, the hydraulic cover is connected to the opening of the cylinder body, the hydraulic cover and the cylinder body jointly form a receiving cavity, and the hydraulic cover is provided with a first through hole.

[0006] Furthermore, a boss and a first limiting body are provided at the bottom of the accommodating groove, the boss and the first limiting body are arranged adjacent to each other, a spring is sleeved on the boss, and a second limiting body is provided on the side of the hydraulic cover close to the cylinder body. When the base is in the first working position, the base abuts against the second limiting body, and when the base is in the second working position, the base abuts against the first limiting body.

[0007] Furthermore, the hydraulic cylinder assembly also includes a piston cap, which is sleeved on an end of the limiting column away from the base, and the piston cap is arranged outside the hydraulic cylinder.

[0008] Further, the motor cylinder body includes: a first cylinder body, having a first groove, a second through hole is provided at the bottom of the first groove, a first connecting structure and a second connecting structure are provided on the side wall of the first groove, two second protrusions are provided opposite to each other on the side wall of the first cylinder body, at least one second connecting hole is provided on the second protrusion, the first cylinder body is connected to the cabin door through the second connecting hole by a connecting piece, and a plurality of third connecting holes are provided on the first cylinder body; a second cylinder body, the second cylinder body is connected to the first cylinder body, the second cylinder body is provided with a plurality of fourth connecting holes, the fourth connecting holes are arranged one by one with the third connecting holes, the second cylinder body is provided with a second groove, the second groove and the first groove jointly form an oil storage cavity, the groove bottom of the second groove is provided with a third through hole, the side wall of the second groove is provided with a third connecting structure and a fourth connecting structure, the side wall of the second cylinder body away from the second groove is provided with a mounting groove, the third connecting structure and the first connecting structure jointly form a third oil port, and the fourth connecting structure and the second connecting structure jointly form a fourth oil port.

[0009] Furthermore, the motor gear has a connecting column, a first gear portion is provided on the connecting column, a first end of the connecting column is connected to the second through hole, a second end of the connecting column is arranged outside the second cylinder body through a third through hole, and a second gear portion is provided at the second end of the connecting column.

[0010] Furthermore, the motor assembly also includes: a strap shell, which is arranged on a side of the second cylinder body away from the first cylinder body, the strap shell having a plurality of fifth connecting holes, the fifth connecting holes being arranged one-to-one corresponding to the fourth connecting holes, and the connecting member passing through the third connecting hole, the fourth connecting hole and the fifth connecting hole to fix the strap shell, the second cylinder body and the first cylinder body; a strap shaft, the strap shell is arranged between the strap shell and the second cylinder body, the strap shaft includes a connecting shaft, a storage platform and a third gear portion are provided on the connecting shaft, the first end of the strap shaft is connected to the mounting groove, the second end of the strap shaft is connected to the strap shell, the third gear portion is arranged between the storage platform and the second cylinder body, the third gear portion is meshed with the second gear portion, and part of the strap is curled up on the storage platform.

[0011] Furthermore, the drawstring housing includes: a first plate body, the second end of the connecting shaft is connected to a side of the first plate body close to the second cylinder body; a second plate body, two second plate bodies, the two second plate bodies are relatively arranged at two ends of the first plate body, one end of the second plate body is connected to the first plate body, and a plurality of third protrusions are provided at the second end of the second plate body, and at least one fifth connecting hole is provided on the third protrusion; wherein a wire passing portion is provided between a side of the first plate body close to the second cylinder body and at least one second plate body.

[0012] Furthermore, the drawstring includes: a belt body, a part of which is wound on the storage platform; a pull ring, which is connected to a first end of the belt body, and a second end of the belt body is connected to the storage platform.

[0013] According to another aspect of the utility model, a vehicle is provided, comprising a retractable door strap device, characterized in that the retractable door strap device is the retractable door strap device mentioned above.

[0014] The technical solution of the utility model is applied, by setting a hydraulic cylinder assembly and a motor assembly connected to the hatch, the hydraulic cylinder assembly includes a hydraulic cylinder and a piston, the compression cylinder has a accommodating chamber, the piston divides the accommodating chamber into a first cavity and a second cavity, the first cavity has a first oil port, the second cavity has a second oil port, and the base of the piston has a first working position close to the first end of the hydraulic cylinder, the base of the piston has a second working position close to the second end of the hydraulic cylinder, the motor assembly includes a motor cylinder body and a pull belt, the motor cylinder body has a third oil port and a fourth oil port, the first oil port is connected to the third oil port through a first oil pipe, and the second oil port is connected to the fourth oil port through a second oil pipe. When the piston When the base is in the first working position, the hatch is in the closed position and the drawstring is in a retracted state. When the base of the piston is converted from the first working position to the second working position, the hatch slowly opens, the base of the piston compresses the second cavity, and the hydraulic oil in the second cavity flows into the motor cylinder through the second oil pipe. The motor cylinder drives the drawstring to be converted from a retracted state to a stretched state, and the hydraulic oil flows from the first oil pipe into the first cavity. In this way, the drawstring is automatically in a stretched state when the hatch is opened. When the hatch is too high, the operator can close the hatch by directly pulling the drawstring. There is no need to close the hatch by climbing or other dangerous behaviors, which ensures the safety of the operator and makes the hatch opening and closing more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 A schematic structural diagram of a first embodiment of a door telescopic drawstring device according to the utility model is shown;

[0017] Figure 2 A structural schematic diagram of a first embodiment of a hydraulic cylinder assembly according to the utility model is shown;

[0018] Figure 3 A structural schematic diagram of a second embodiment of a hydraulic cylinder assembly according to the utility model is shown;

[0019] Figure 4 A structural schematic diagram of an embodiment of a hydraulic cover according to the utility model is shown;

[0020] Figure 5 A schematic structural diagram of an embodiment of a motor assembly according to the utility model is shown;

[0021] Figure 6 A schematic structural diagram of an embodiment of a motor gear according to the utility model is shown;

[0022] Figure 7 A schematic structural diagram of an embodiment of a drawstring housing according to the utility model is shown;

[0023] Figure 8 A schematic structural diagram of an embodiment of a drawstring rotating shaft according to the utility model is shown;

[0024] Fig. 9 A structural schematic diagram of an embodiment of a first cylinder body according to the utility model is shown;

[0025] Fig.10 A schematic structural diagram of a first embodiment of a second cylinder body according to the utility model is shown;

[0026] Fig.11 A schematic structural diagram of a second embodiment of a second cylinder body according to the utility model is shown;

[0027] Fig.12 A schematic structural diagram of an embodiment of a drawstring according to the utility model is shown;

[0028] Fig.13 A structural schematic diagram of a second embodiment of a cabin door telescopic strap device according to the utility model is shown.

[0029] The above drawings include the following reference numerals:

[0030] 10. Hydraulic cylinder; 100. Cylinder body; 101. First protrusion; 102. First connecting hole; 103. Hydraulic cover; 1030. First through hole; 104. Boss; 105. First stopper; 106. Second stopper; 11. Piston; 110. Base; 111. Stopper column; 12. First cavity; 120. First oil port; 13. Second cavity; 130. Second oil port; 15. Piston cap;

[0031] 20, motor cylinder; 200, third oil port; 201, fourth oil port; 21, pull belt; 210, belt body; 211, pull ring; 22, motor gear; 220, connecting column; 221, first gear part; 222, second gear part; 23, first cylinder; 230, first groove; 231, first connecting structure; 232, second connecting structure; 233, second protrusion; 234, second connecting hole; 235, third connecting hole; 2 4. Second cylinder body; 240. Fourth connecting hole; 241. Second groove; 242. Third through hole; 243. Third connecting structure; 244. Fourth connecting structure; 245. Mounting groove; 25. Drawstring housing; 250. Fifth connecting hole; 251. Second plate body; 252. Third protrusion; 253. First plate body; 26. Drawstring rotating shaft; 260. Connecting shaft; 261. Storage platform; 262. Third gear unit; 27. Wire passing unit;

[0032] 30. First oil pipeline; 31. Second oil pipeline. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0037] Combination Figures 1 to 13 As shown, according to a specific embodiment of the present application, a cabin door retractable strap device is provided.

[0038] Specifically, a hatch door telescopic drawstring device is characterized in that it includes: a hydraulic cylinder assembly, the hydraulic cylinder assembly includes a hydraulic cylinder 10 and a piston 11, the hydraulic cylinder 10 has a accommodating chamber for accommodating hydraulic oil, the first end of the hydraulic cylinder 10 is connected to the hatch door, the second end of the hydraulic cylinder 10 is provided with a first through hole 1030, the piston 11 includes a base 110 and a limiting column 111, the base 110 is connected to the limiting column 111, the base 110 is arranged in the accommodating chamber to divide the accommodating chamber into a first cavity 12 and a second cavity 13, part of the limiting column 111 extends to the outside of the hydraulic cylinder 10 through the first through hole 1030, the base 110 has a first working position close to the first end of the hydraulic cylinder 10, the base 110 has a second working position close to the second end of the hydraulic cylinder 10, and when the base 110 is in the first working position, the hatch door In the closed position, the hatch is in the open position when the base 110 is in the second working position; the motor assembly is connected to the hatch, the motor assembly includes a motor cylinder 20 and a drawstring 21, the motor cylinder 20 has an oil storage chamber, a motor gear 22 is provided in the oil storage chamber, the motor gear 22 drives the drawstring 21 to retract and retract, when the base 110 is in the second working position the drawstring 21 is in a stretched state, when the base 110 is in the first working position the drawstring 21 is in a retracted state; wherein the first cavity 12 has a first oil port 120, the second cavity 13 has a second oil port 130, a third oil port 200 and a fourth oil port 201 are provided in the oil storage chamber, the first oil port 120 is connected to the third oil port 200 through the first oil pipe 30, and the second oil port 130 is connected to the fourth oil port 201 through the second oil pipe 31.

[0039] In this embodiment, Figure 1 , Fig.13As shown, by setting a hydraulic cylinder assembly and a motor assembly connected to the hatch, the hydraulic cylinder assembly includes a hydraulic cylinder and a piston, the compression cylinder has a accommodating chamber, the piston divides the accommodating chamber into a first cavity and a second cavity, the first cavity has a first oil port, the second cavity has a second oil port, and the base of the piston has a first working position close to the first end of the hydraulic cylinder, the base of the piston has a second working position close to the second end of the hydraulic cylinder, the motor assembly includes a motor cylinder body and a pull belt, the motor cylinder body has a third oil port and a fourth oil port, the first oil port is connected to the third oil port through a first oil pipe, and the second oil port is connected to the fourth oil port through a second oil pipe. When the base of the piston is in When the hatch is in the first working position, the hatch is in a closed position and the drawstring is in a retracted state. When the base of the piston is converted from the first working position to the second working position, the hatch slowly opens, the base of the piston compresses the second cavity, and the hydraulic oil in the second cavity flows into the motor cylinder through the second oil pipe. The motor cylinder drives the drawstring from a retracted state to a stretched state, and the hydraulic oil flows from the first oil pipe into the first cavity. In this way, the drawstring is automatically in a stretched state when the hatch is opened. When the hatch is too high, the operator can close the hatch by directly pulling the drawstring. There is no need to close the hatch by climbing or other dangerous behaviors, which ensures the safety of the operator and makes the hatch opening and closing more convenient.

[0040] Further, the hydraulic cylinder 10 comprises: a cylinder body 100, the cylinder body 100 is provided with a receiving groove with an opening, a first protrusion 101 is provided on the side wall of the cylinder body 100, a plurality of first connecting holes 102 are provided on the first protrusion 101, the cylinder body 100 is connected to the hatch through the first connecting holes 102 via a connecting piece; a hydraulic cover 103, the hydraulic cover 103 is connected to the opening of the cylinder body 100, the hydraulic cover 103 and the cylinder body 100 jointly form a receiving cavity, and the hydraulic cover 103 is provided with a first through hole 1030. This arrangement allows the piston 11 to stably move in the hydraulic cylinder 10, and the base 110 of the piston 11 fits with the inner wall of the receiving groove, ensuring that the hydraulic oil in the first cavity and the second cavity does not leak, and ensuring the stability of the operation of the hydraulic cylinder 10.

[0041] like Figure 2 , Figure 3As shown, the bottom of the receiving groove is provided with a boss 104 and a first position-limiting body 105, the boss 104 and the first position-limiting body 105 are arranged adjacent to each other, a spring 14 is sleeved on the boss 104, and a second position-limiting body 106 is provided on the side of the hydraulic cover 103 close to the cylinder body 100. When the base 110 is in the first working position, the base 110 abuts against the second position-limiting body 106, and when the base 110 is in the second working position, the base 110 abuts against the first position-limiting body 105. This arrangement ensures the position limitation of the piston 11 when it moves in the hydraulic cylinder 10, effectively preventing the piston 11 from damaging the hydraulic cylinder 10 when it moves, and ensures that the piston 11 will not connect the first oil port 120 with the second cavity or the second oil port 130 with the first cavity when it moves, effectively preventing damage to the hydraulic cylinder.

[0042] Furthermore, if Figure 4 As shown, the hydraulic cylinder assembly further includes a piston cap 15, which is sleeved on one end of the limit column 111 away from the base 110, and the piston cap 15 is located outside the hydraulic cylinder 10. The piston cap 15 protects the piston 11 and effectively prevents the piston 11 from scratching against the door.

[0043] like Figure 5 , Fig.11 As shown, the motor cylinder 20 includes: a first cylinder 23, having a first groove 230, a second through hole is provided at the bottom of the first groove 230, a first connecting structure 231 and a second connecting structure 232 are provided on the side wall of the first groove 230, two second protrusions 233 are provided on the side wall of the first cylinder 23, and at least one second connecting hole 234 is provided on the second protrusion 233. The first cylinder 23 is connected to the hatch through the second connecting hole 234 through a connecting member, and a plurality of third connecting holes 235 are provided on the first cylinder 23; a second cylinder 24, the second cylinder 24 is connected to the first cylinder 23, and the second cylinder 24 is provided with a plurality of fourth connecting holes 235. The connecting hole 240, the fourth connecting hole 240 and the third connecting hole 235 are arranged one by one, the second cylinder body 24 is provided with a second groove 241, the second groove 241 and the first groove 230 together form an oil storage cavity, the groove bottom of the second groove 241 is provided with a third through hole 242, the side wall of the second groove 241 is provided with a third connecting structure 243 and a fourth connecting structure 244, the side wall of the second cylinder body 24 away from the second groove 241 is provided with a mounting groove 245, the third connecting structure 243 and the first connecting structure 231 together form a third oil port 200, and the fourth connecting structure 244 and the second connecting structure 232 together form a fourth oil port 201. This arrangement allows the motor gear 22 to be more conveniently installed in the motor cylinder body 20, and ensures that the sealing of the oil storage cavity in the motor cylinder body 20 is more reliable.

[0044] Furthermore, if Figure 6As shown, the motor gear 22 has a connecting column 220, a first gear portion 221 is provided on the connecting column 220, a first end of the connecting column 220 is connected to the second through hole, a second end of the connecting column 220 is arranged outside the second cylinder body 24 through a third through hole 242, and a second gear portion 222 is provided at the second end of the connecting column 220. This arrangement enables the hydraulic oil to drive the first gear portion 221 to rotate, the first gear portion 221 drives the second gear portion 222 to rotate through the connecting column 220, and the power is transmitted to the pull belt 21 through the second gear portion 222, which effectively ensures that the motor gear 22 can stably transmit the power to the pull belt 21.

[0045] Furthermore, if Figure 8 , Fig. 9 , Fig.10 As shown, the motor assembly also includes: a drawstring housing 25, the drawstring housing 25 is arranged on the side of the second cylinder 24 away from the first cylinder 23, the drawstring housing 25 has a plurality of fifth connecting holes 250, the fifth connecting holes 250 are arranged one-to-one with the fourth connecting holes 240, and the connecting member passes through the third connecting hole 235, the fourth connecting hole 240 and the fifth connecting hole 250 to fix the drawstring housing 25, the second cylinder 24 and the first cylinder 23; a drawstring shaft 26, the drawstring housing 25 is arranged at Between the drawstring housing 25 and the second cylinder 24, the drawstring shaft 26 includes a connecting shaft 260, on which a receiving platform 261 and a third gear part 262 are provided, the first end of the drawstring shaft 26 is connected to the mounting groove 245, the second end of the drawstring shaft 26 is connected to the drawstring housing 25, the third gear part 262 is provided between the receiving platform 261 and the second cylinder 24, the third gear part 262 is meshed with the second gear part 222, and part of the drawstring 21 is rolled up on the receiving platform 261. This arrangement enables the drawstring housing 25 to protect the drawstring, and the drawstring shaft 26 to position the drawstring 21, effectively ensuring that the drawstring 21 will not deviate during operation.

[0046] like Figure 7As shown, the drawstring housing 25 includes: a first plate 253, the second end of the connecting shaft 260 is connected to the side of the first plate 253 close to the second cylinder 24; a second plate 251, two second plates 251, the two second plates 251 are arranged at the two ends of the first plate 253, one end of the second plate 251 is connected to the first plate 253, and the second end of the second plate 251 is provided with a plurality of third protrusions 252, and the third protrusions 252 are provided with at least one fifth connection hole 250; wherein, a wire passing portion 27 is provided between the side of the first plate 253 close to the second cylinder 24 and at least one second plate 251. Such a configuration enables the drawstring housing 25 to protect the drawstring rotating shaft 26, and the wire passing portion 27 is provided so that when the hatch is in the open position, the drawstring 21 is in a stretched state through the wire passing portion 27, effectively ensuring that the drawstring 21 is stably in a stretched state, and preventing the drawstring from swinging randomly, etc., which causes the operator to be unable to reach the drawstring.

[0047] like Fig.12 As shown, the drawstring 21 includes: a belt body 210, a portion of the belt body 210 is wound on a receiving platform 261; a pull ring 211, the pull ring 211 is connected to a first end of the belt body 210, and a second end of the belt body 210 is connected to the receiving platform 261. This arrangement makes it more convenient for operators to pull the drawstring, thereby improving convenience.

[0048] In another embodiment of the present application, a vehicle is provided, comprising a retractable door strap device, wherein the retractable door strap device is the retractable door strap device of the above embodiment.

[0049] In another embodiment of the present application, when the hatch is closed, the drawstring 21 is in a retracted state. When the hatch is opened, the piston and the piston cap will be pushed to the right, so that the hydraulic oil in the first cavity is reduced and the hydraulic oil in the second cavity is increased. The hydraulic oil flows from the first oil pipe through the motor cylinder below, and finally flows back to the second cavity through the second oil pipe. When the liquid flows through the motor cylinder, the flowing liquid pushes the motor gear to rotate clockwise. When the motor gear rotates clockwise, the drawstring shaft is meshed with the motor gear, so the drawstring shaft will rotate counterclockwise, and then the drawstring 21 will slowly fall down, and at the same time, the hatch will open.

[0050] When the hatch is open, the drawstring is in a stretched state, vertically downward, and the drawstring ring of the drawstring 21 can be pulled down by hand, until the hatch can be touched by hand, and then the hatch is closed by hand. When closing, when the piston cap contacts the embedded bracket on the hatch, the piston will be pushed to the left, and the liquid will flow from the first cavity through the motor cylinder below, and finally flow back to the second cavity through the second oil pipe. When the liquid flows through the motor cylinder, the flowing liquid pushes the motor gear to rotate counterclockwise. When the motor gear rotates counterclockwise, the drawstring shaft is meshed with the motor gear, so the drawstring shaft will rotate clockwise, and then the drawstring will slowly shrink to the original state, and at the same time, the hatch will be closed.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present utility model.

[0053] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0054] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A door retractable drawstring device, characterized in that: include: A hydraulic cylinder assembly, the hydraulic cylinder assembly comprising a hydraulic cylinder (10) and a piston (11), the hydraulic cylinder (10) having a receiving chamber for receiving hydraulic oil, the first end of the hydraulic cylinder (10) being connected to a hatch, the second end of the hydraulic cylinder (10) being provided with a first through hole (1030), the piston (11) comprising a base (110) and a limiting column (111), the base (110) being connected to the limiting column (111), the base (110) being arranged in the receiving chamber to divide the receiving chamber into a first cavity (12 ) and a second cavity (13), part of the limiting column (111) extends to the outside of the hydraulic cylinder (10) through the first through hole (1030), the base (110) has a first working position close to the first end of the hydraulic cylinder (10), the base (110) has a second working position close to the second end of the hydraulic cylinder (10), when the base (110) is in the first working position, the hatch is in a closed position, and when the base (110) is in the second working position, the hatch is in an open position; A motor assembly, the motor assembly is connected to the cabin door, the motor assembly comprises a motor cylinder (20) and a drawstring (21), the motor cylinder (20) has an oil storage chamber, a motor gear (22) is arranged in the oil storage chamber, the motor gear (22) drives the drawstring (21) to extend and retract, when the base (110) is in the second working position, the drawstring (21) is in a stretched state, when the base (110) is in the first working position, the drawstring (21) is in a retracted state; The first cavity (12) has a first oil port (120), the second cavity (13) has a second oil port (130), and the oil storage cavity is provided with a third oil port (200) and a fourth oil port (201); the first oil port (120) is connected to the third oil port (200) through a first oil pipe (30), and the second oil port (130) is connected to the fourth oil port (201) through a second oil pipe (31).

2. The door retractable strap device according to claim 1, characterized in that: The hydraulic cylinder (10) comprises: A cylinder body (100), the cylinder body (100) being provided with a receiving groove having an opening, a first protrusion (101) being provided on a side wall of the cylinder body (100), a plurality of first connecting holes (102) being provided on the first protrusion (101), and the cylinder body (100) being connected to the cabin door through a connecting piece passing through the first connecting holes (102); A hydraulic cover (103), the hydraulic cover (103) is connected to the opening of the cylinder body (100), the hydraulic cover (103) and the cylinder body (100) together form the accommodating cavity, and the hydraulic cover (103) is provided with the first through hole (1030).

3. The door retractable strap device according to claim 2, characterized in that: A boss (104) and a first limiting body (105) are provided at the bottom of the receiving groove. The boss (104) and the first limiting body (105) are arranged adjacent to each other. A spring (14) is sleeved on the boss (104). A second limiting body (106) is provided on a side of the hydraulic cover (103) close to the cylinder body (100). When the base (110) is in the first working position, the base (110) abuts against the second limiting body (106). When the base (110) is in the second working position, the base (110) abuts against the first limiting body (105).

4. The door retractable strap device according to claim 1, characterized in that: The hydraulic cylinder assembly further comprises a piston cap (15), wherein the piston cap (15) is sleeved on an end of the limiting column (111) away from the base (110), and the piston cap (15) is located outside the hydraulic cylinder (10).

5. The door retractable strap device according to claim 1, characterized in that: The motor cylinder (20) comprises: The first cylinder body (23) comprises a first groove (230), a second through hole is provided at the bottom of the first groove (230), a first connecting structure (231) and a second connecting structure (232) are provided on the side wall of the first groove (230), two second protrusions (233) are provided opposite to each other on the side wall of the first cylinder body (23), at least one second connecting hole (234) is provided on the second protrusion (233), the first cylinder body (23) is connected to the cabin door through a connecting piece passing through the second connecting hole (234), and a plurality of third connecting holes (235) are provided on the first cylinder body (23); A second cylinder body (24), wherein the second cylinder body (24) is connected to the first cylinder body (23), the second cylinder body (24) is provided with a plurality of fourth connecting holes (240), the fourth connecting holes (240) are arranged in one-to-one correspondence with the third connecting holes (235), the second cylinder body (24) is provided with a second groove (241), the second groove (241) and the first groove (230) together form the oil storage cavity, the groove bottom of the second groove (241) is provided with a third through hole (242), the side wall of the second groove (241) is provided with a third connecting structure (243) and a fourth connecting structure (244), the side wall of the second cylinder body (24) away from the second groove (241) is provided with a mounting groove (245), the third connecting structure (243) and the first connecting structure (231) together form the third oil port (200), and the fourth connecting structure (244) and the second connecting structure (232) together form the fourth oil port (201).

6. The door retractable strap device according to claim 5, characterized in that: The motor gear (22) has a connecting column (220), and a first gear portion (221) is provided on the connecting column (220). The first end of the connecting column (220) is connected to the second through hole, and the second end of the connecting column (220) is arranged outside the second cylinder body (24) through the third through hole (242), and the second end of the connecting column (220) is provided with a second gear portion (222).

7. The door retractable strap device according to claim 6, characterized in that: The motor assembly further comprises: A drawstring housing (25), the drawstring housing (25) being arranged on a side of the second cylinder (24) away from the first cylinder (23), the drawstring housing (25) having a plurality of fifth connecting holes (250), the fifth connecting holes (250) being arranged in one-to-one correspondence with the fourth connecting holes (240), the connecting member passing through the third connecting hole (235), the fourth connecting hole (240) and the fifth connecting hole (250) to fix the drawstring housing (25), the second cylinder (24) and the first cylinder (23); The drawstring shaft (26) is provided with a drawstring housing (25) and a second cylinder body (24). The drawstring shaft (26) includes a connecting shaft (260). A storage platform (261) and a third gear portion (262) are provided on the connecting shaft (260). The first end of the drawstring shaft (26) is connected to the mounting groove (245). The second end of the drawstring shaft (26) is connected to the drawstring housing (25). The third gear portion (262) is provided between the storage platform (261) and the second cylinder body (24). The third gear portion (262) is meshed with the second gear portion (222). Part of the drawstring (21) is rolled up on the storage platform (261).

8. The door retractable strap device according to claim 7, characterized in that: The drawstring housing (25) comprises: A first plate body (253), wherein the second end of the connecting shaft (260) is connected to a side of the first plate body (253) close to the second cylinder body (24); A second plate body (251), wherein the number of the second plate bodies (251) is two, the two second plate bodies (251) are arranged oppositely at two ends of the first plate body (253), one end of the second plate body (251) is connected to the first plate body (253), a second end of the second plate body (251) is provided with a plurality of third protrusions (252), and the third protrusions (252) are provided with at least one of the fifth connecting holes (250); Wherein, a line-passing portion (27) is provided between a side of the first plate body (253) close to the second cylinder body (24) and at least one of the second plate bodies (251).

9. The door retractable strap device according to claim 8, characterized in that: The drawstring (21) comprises: A belt body (210), a portion of the belt body (210) is wound on the storage platform (261); A pull ring (211), wherein the pull ring (211) is connected to a first end of the belt body (210), and a second end of the belt body (210) is connected to the storage platform (261).

10. A vehicle, comprising a door retractable strap device, characterized in that: The telescopic drawstring device for a hatch door is the telescopic drawstring device for a hatch door according to any one of claims 1 to 9.

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