Side door structure of carriage

Abstract

The side door structure comprises a first connecting arm, an upper side door, a second connecting arm, a third connecting arm, a lower side door, a first hinge seat, a second hinge seat and a third hinge seat. When the door is opened, a user pulls the lower side door open, the third connecting arm can be lifted while the lower side door is turned over downwards through the fulcrum effect of the third hinge base, the third connecting arm lifts the second connecting arm, and therefore the upper side door is lifted up at the same time, the upper side door is turned over according to a fixed track, and the whole side door opening process is completed. The utility model discloses a purely mechanical transmission structure, compared with complex side door structure, have higher reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of carriages, in particular to a side door structure of a carriage. Background Art

[0002] Patent 202021824852.X discloses a new multifunctional carriage structure, which requires pneumatic struts to open the upper side doors and the upper rear side doors when needed. The pneumatic struts provide assistance and support during the opening process. However, the pneumatic structure requires power supply, which must be stable, and its stable operation requires that its mechanical transmission part, air circuit part, and circuit part all work normally. When one of them fails, the above functions cannot be achieved. In addition, the pneumatic speed is usually slow, which is not conducive to taking items in an emergency (for example, when a fire truck compartment is responding to a fire). Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a side door structure of a carriage, which is a pure mechanical transmission structure and has higher reliability compared with a complex side door structure.

[0004] In order to solve the above technical problems, the utility model discloses a side door structure of a carriage, which is used to open and close the first side of the carriage, and comprises a first connecting arm, an upper side door, a second connecting arm, a third connecting arm, a lower side door, a first hinge seat, a second hinge seat, and a third hinge seat;

[0005] The first hinge seat is fixed to the outer wall surface of the roof of the carriage and is away from the first side surface; one end of the first connecting arm is hinged to the first hinge seat, and the other end thereof is hinged to the upper end of the upper side door;

[0006] The second hinge seat is fixed to the inner wall surface of the roof of the carriage, and the second hinge seat is closer to the first side surface than the first hinge seat; one end of the second connecting arm is hinged to the lower end of the upper side door, and the other end thereof is hinged to the second hinge seat;

[0007] One end of the third connecting arm is hinged to the second connecting arm, and the hinged position on the second connecting arm is located between the two ends of the second connecting arm, and the other end of the third connecting arm is hinged to the lower end of the lower side door;

[0008] The third hinge seat is fixed on the end of the bottom plate of the carriage located on the first side surface, and extends from the end surface to the outside of the first side surface. The lower end of the lower side door is hinged to the third hinge seat, and the position of the third hinge seat on the lower side door is between the upper end of the lower side door and the lower end of the lower side door.

[0009] As an optional implementation, a pedal is also hinged on the inner wall surface of the upper end portion of the lower side door.

[0010] As another optional implementation, the lower end portion of the third connecting arm is bent in a direction away from the lower side door.

[0011] As another optional implementation, an upper end portion of the third connecting arm is bent in a direction away from the second connecting arm.

[0012] As another optional implementation, a handle for pulling the lower side door is provided on the outer wall surface of the lower side door.

[0013] As another optional embodiment, a limit block is fixed at the place where the lower side door is hinged to the pedal, and the limit block is used to limit the movement of the pedal between the lower side door and the limit block.

[0014] As another optional embodiment, it also includes a pedal limit pin for limiting the position of the pedal; the pedal limit pin is arranged on the inner wall surface of the lower side door and is located above the pedal, and the pedal limit pin can lock the pedal when the pedal moves close to the inner wall surface.

[0015] As another optional implementation, a plurality of L-shaped pedals are fixed on the outer wall surface of the lower side door.

[0016] As another optional embodiment, it also includes a lock for locking the upper side door and the lower side door.

[0017] As another optional embodiment, the third hinge seat is a hinge hinge, wherein one hinge leaf is fixed to the lower side door, and the other hinge leaf is fixed to the end of the bottom plate of the carriage located on the first side surface.

[0018] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0019] The embodiment of the utility model is a pure mechanical transmission structure, which is more reliable than the complex side door structure composed of a mechanical transmission part, an air circuit part and an electric circuit part, and can be opened whenever needed in an emergency; the transmission mechanism of the side door is a mechanical connecting rod, which is small in size and occupies less space in the car; after opening the door, the upper side door is in a tilted state, which can provide shielding for the operator located below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a structural schematic diagram of a side door structure of a carriage disclosed in an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of a carriage disclosed in an embodiment of the utility model;

[0023] Figure 3 It is another structural schematic diagram of a side door structure of a carriage disclosed in an embodiment of the utility model;

[0024] Figure 4 It is another structural schematic diagram of a side door structure of a carriage disclosed in an embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4 The utility model embodiment discloses a side door structure of a carriage, which is used to open and close the first side of the carriage, including a first connecting arm 1, an upper side door 2, a second connecting arm 3, a third connecting arm 4, a lower side door 9, a first hinge seat 12, a second hinge seat 13, and a third hinge seat 10;

[0027] The first hinge seat 12 is fixed to the outer wall surface of the roof of the compartment and is away from the first side surface; one end of the first connecting arm 1 is hinged to the first hinge seat 12, and the other end thereof is hinged to the upper end of the upper side door 2;

[0028] The second hinge seat 13 is fixed to the inner wall surface of the roof of the compartment, and the second hinge seat 13 is closer to the first side surface than the first hinge seat 12; one end of the second connecting arm 3 is hinged to the lower end of the upper side door 2, and the other end thereof is hinged to the second hinge seat 13;

[0029] One end of the third connecting arm 4 is hinged to the second connecting arm 3, and the hinged position on the second connecting arm 3 is located between the two ends of the second connecting arm 3, and the other end of the third connecting arm 4 is hinged to the lower end of the lower side door 9;

[0030] The third hinge seat 10 is fixed to the bottom plate of the vehicle body on the end of the first side surface and extends from the end to the outside of the first side surface. The lower end of the lower side door 9 is hinged to the third hinge seat 10, and the position of the third hinge seat 10 on the lower side door 9 is between the upper end of the lower side door 9 and the lower end of the lower side door 9.

[0031] In this embodiment, the first side surface is the left side surface, the right side surface or the rear side surface of the vehicle compartment.

[0032] See also Figure 1 , 3 4. When opening the door, the user pulls open the lower side door 9. Through the fulcrum action of the third hinge seat 10, the lower side door 9 flips downward and lifts the third connecting arm 4. The third connecting arm 4 lifts the second connecting arm 3, thereby lifting the upper side door 2 at the same time, causing the upper side door 2 to flip along a fixed trajectory, thus completing the entire side door opening process. Figure 3 The lower side door 9 is at an angle of 45 degrees. Figure 4 The lower side door 9 is at an angle of 90 degrees (fully opened state).

[0033] In the process of opening the door, the gravity G2 of the lower side door makes the lower side door 9 rotate downward through the third hinge seat 10, and transmits torque to the upper side door 2 through the third connecting arm 4 and the second connecting arm 3, and the torque is the torque that lifts the upper side door 2 upward; while the gravity G1 of the upper side door 2 makes the upper side door 2 move downward, which is exactly opposite to the direction of the torque applied by the gravity G2 of the lower side door 9 to the upper side door 2, and the two will cancel each other out. If the gravity G2 of the lower side door 9 is designed to be just large enough to completely cancel each other out, then the user can easily open the side door, and the specific design can be based on actual needs.

[0034] The embodiment of the utility model is a pure mechanical transmission structure, which is more reliable than the complex side door structure composed of a mechanical transmission part, an air circuit part and a circuit part, and can be opened at any time in an emergency; the transmission mechanism of the side door is a mechanical connecting rod (arm), which is small in size and occupies less space in the compartment; after opening the door, the upper side door 2 is in a tilted state ( Figure 4 ) can provide shielding for operators located below.

[0035] Optionally, a pedal 5 is hinged on the inner wall surface of the upper end of the lower side door 9, so that the door opening and the pedal opening are combined into one, which speeds up the speed of the operator opening the door to enter the compartment.

[0036] Further optionally, it also includes a pedal limit pin 8 for limiting the position of the pedal 5; the pedal limit pin 8 is arranged on the inner wall surface of the lower side door 9 and is located above the pedal. When the pedal moves close to the inner wall surface, the pedal limit pin 8 can lock the pedal 5.

[0037] Further optionally, a limit block 14 is fixed at the place where the lower side door 9 is hinged to the pedal 5, and the limit block is used to limit the movement of the pedal 5 between the lower side door 9 and the limit block.

[0038] Further optionally, a plurality of L-shaped pedals 6 are fixed to the outer wall surface of the lower side door 9 .

[0039] Further optionally, the lower end of the third connecting arm 4 is bent in a direction away from the lower side door 9 .

[0040] Further optionally, an upper end portion of the third connecting arm 4 is bent in a direction away from the second connecting arm 3 .

[0041] Further optionally, a handle 7 for pulling the lower side door 9 is provided on the outer wall surface of the lower side door 9. Optionally, when opening the door, the user first unlocks the lock 11, and then uses the handle 7 to open the lower side door 9. When the lower side door 9 is opened to a certain extent, the user can directly move the lower side door 9 to open the door.

[0042] Further optionally, a lock 11 for locking the upper side door 2 and the lower side door 9 is also included.

[0043] Further optionally, the third hinge seat 10 is a hinge hinge, in which one hinge leaf is fixed to the lower side door 9, and the other hinge leaf is fixed to the end of the bottom plate of the carriage located on the first side.

[0044] When closing the door, the pedal 5 can be turned over to the position close to the lower side door 9, and then the pedal limit pin 8 is used to limit the position. Then the lower side door 9 is turned upwards until the car door is closed in place, and then the door is locked with the door lock 11.

[0045] The contents disclosed in the embodiments of the present invention only disclose the preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A side door structure of a carriage, used for opening and closing a first side of the carriage, characterized in that: It includes a first connecting arm, an upper side door, a second connecting arm, a third connecting arm, a lower side door, a first hinge seat, a second hinge seat, and a third hinge seat; The first hinge seat is fixed to the outer wall surface of the roof of the carriage and is away from the first side surface; one end of the first connecting arm is hinged to the first hinge seat, and the other end thereof is hinged to the upper end of the upper side door; The second hinge seat is fixed to the inner wall surface of the roof of the carriage, and the second hinge seat is closer to the first side surface than the first hinge seat; one end of the second connecting arm is hinged to the lower end of the upper side door, and the other end thereof is hinged to the second hinge seat; One end of the third connecting arm is hinged to the second connecting arm, and the hinged position on the second connecting arm is located between the two ends of the second connecting arm, and the other end of the third connecting arm is hinged to the lower end of the lower side door; The third hinge seat is fixed on the end of the bottom plate of the carriage located on the first side surface, and extends from the end surface to the outside of the first side surface. The lower end of the lower side door is hinged to the third hinge seat, and the position of the third hinge seat on the lower side door is between the upper end of the lower side door and the lower end of the lower side door.

2. The side door structure according to claim 1, characterized in that: A pedal is also hinged on the inner wall surface of the upper end portion of the lower side door.

3. The side door structure according to claim 1, characterized in that: The lower end portion of the third connecting arm is bent in a direction away from the lower side door.

4. The side door structure according to claim 1, characterized in that: The upper end portion of the third connecting arm is bent in a direction away from the second connecting arm.

5. The side door structure according to claim 1, characterized in that: A handle for pulling the lower side door is provided on the outer wall surface of the lower side door.

6. The side door structure according to claim 2, characterized in that: A limiting block is fixed at the place where the lower side door is hinged to the pedal, and the limiting block is used to limit the movement of the pedal between the lower side door and the limiting block.

7. The side door structure according to claim 2, characterized in that: It also includes a pedal limit pin for limiting the position of the pedal; the pedal limit pin is arranged on the inner wall surface of the lower side door and is located above the pedal. When the pedal moves close to the inner wall surface, the pedal limit pin can lock the pedal.

8. The side door structure according to claim 1, characterized in that: A plurality of L-shaped pedals are also fixed on the outer wall surface of the lower side door.

9. The side door structure according to claim 1, characterized in that: Also included is a lock for locking the upper side door and the lower side door.

10. The side door structure according to claim 1, characterized in that: The third hinge seat is a hinge hinge, wherein one hinge leaf is fixed on the lower side door, and the other hinge leaf is fixed on the end of the bottom plate of the carriage located on the first side surface.

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