Operating machine vehicle door limiting structure and operating machine

Abstract

The utility model relates to the technical field of operation machinery, and discloses an operation machinery vehicle door limiting structure and an operation machinery. The vehicle door limiting structure of the operation machine comprises a rotating rod, a first end of the rotating rod is rotationally connected with a door frame, and the rotating rod rotates to a preset position under the condition that a vehicle door is opened to a preset angle; the limiting column is installed on the automobile door and provided with a first position and a second position, when the limiting column is located at the first position, the limiting column is in sliding fit with the rotating rod, and when the limiting column is located at the second position, the limiting column is located at the second end of the rotating rod and locks the rotating rod at the preset position; the wind hook unlocking device solves the problem that a driver cannot operate the wind hook to unlock the wind hook conveniently in the process of driving an operation machine.

Description

Technical Field

[0001] The utility model relates to the technical field of operating machinery, in particular to an operating machinery door limiting structure and the operating machinery. Background Art

[0002] Working machinery refers to mechanical devices with working equipment suitable for completing specific working tasks, such as cranes, excavators, bulldozers, etc. In actual use scenarios, working machinery often works on uneven roads. When the doors of working machinery are opened, the doors are easily closed under the action of gravity or wind.

[0003] In the prior art, the vehicle door is supported and limited by a limiting structure such as a wind hook or a connecting strut, so as to keep the vehicle door open.

[0004] However, when the wind hook in the above-mentioned prior art is unlocked, the wind hook itself needs to be operated, so it usually requires two hands to operate. During actual use, it is inconvenient for the driver to operate the wind hook while driving the operating machine. Utility Model Content

[0005] In view of this, the utility model provides a door limiting structure of an operating machine and an operating machine, so as to solve the problem that it is inconvenient for the driver to operate the wind hook to unlock it during driving the operating machine.

[0006] In a first aspect, the utility model provides a door limiting structure for a working machinery, wherein the working machinery comprises a door frame and a door mounted on the door frame, and the door limiting structure for the working machinery comprises: a rotating rod, a first end of which is rotatably connected to the door frame, and when the door is opened to a preset angle, the rotating rod rotates to a preset position; a limiting column, mounted on the door, having a first position and a second position, and when the limiting column is located at the first position, the limiting column slidingly cooperates with the rotating rod, and when the limiting column is located at the second position, the limiting column is located at the second end of the rotating rod and locks the rotating rod at the preset position.

[0007] Beneficial effects: when the vehicle door is not at a preset angle, the limit post is in a first position and slidingly cooperates with the rotating rod, at which time the rotating rod can rotate, thereby not hindering the movement of the vehicle door; when the vehicle door is opened to a preset angle, a rotating rod is provided that is rotatably connected to the door frame and rotates with the vehicle door, and a limit post is provided on the vehicle door that is located at a second position and can lock the rotating rod at a preset position, so that a triangular support structure is formed between the vehicle door, the rotating rod and the door frame, thereby keeping the vehicle door open; the user can adjust the position of the limit post with one hand to switch the limit post between the first position and the second position, thereby completing the limiting and releasing of the vehicle door, and the operation is convenient and quick.

[0008] In an optional embodiment, a mounting seat is provided on the door frame, the rotating rod is rotatably connected to the mounting seat, the rotating rod is provided with a sliding groove extending along its length direction and a limiting hole connected to the sliding groove and located at the second end of the rotating rod, the diameter of the limiting hole is larger than the groove width of the sliding groove, when the limiting column is located in the first position, the limiting column is slidably matched with the sliding groove, and when the limiting column is located in the second position, the limiting column is located in the limiting hole.

[0009] Beneficial effects: The rotating rod is rotatably connected to the door frame through the mounting seat, with a simple structure and easy assembly. A slide groove and a limit hole are provided on the rotating rod, and the diameter of the limit hole is larger than the slide groove. The limit column can be slidably connected by cooperating with the slide groove, and the limit column can also cooperate with the limit hole to lock the rotating rod. The rotating rod has a simple structure, low cost and reliable function.

[0010] In an optional embodiment, a connecting seat is provided on the vehicle door, and the limiting column can be telescopically installed on the connecting seat, and the limiting column includes a head, a neck and a limiting portion. When the limiting column is located at the first position, the neck slides in cooperation with the slide groove, and the diameter of the limiting portion is larger than the groove width of the slide groove. When the limiting column is located at the second position, the limiting portion is located in the limiting hole to lock the rotating rod at the preset position, and the diameter of the head is larger than the diameter of the limiting hole.

[0011] Beneficial effect: Since the limiting column includes a head, a neck and a limiting portion, the head has the largest diameter, thereby preventing the limiting column from completely passing through the limiting hole and thus disengaging from the rotating rod, causing the possibility of structural failure; the neck is adapted to the slide groove, and the limiting portion is adapted to the limiting hole and cannot enter the slide groove, thereby realizing the function of sliding cooperation with the rotating rod when the limiting column is in the first position, and cooperating with the limiting hole to lock the rotating rod when the limiting column is in the second position.

[0012] In an optional embodiment, a first limit seat is provided on the vehicle door at the lower side of the connecting seat, and a return spring is provided on the first limit seat. The end of the return spring away from the first limit seat abuts against the limit column and is suitable for pushing the limit column from the first position to the second position.

[0013] Beneficial effect: By setting a return spring, when the driver opens the car door and the car door rotates to a preset position, the return spring automatically pushes the limit column from the first position to the second position, so that the limit column locks the rotating rod to achieve the limit of the car door, further simplifying the operation of limiting the car door and improving convenience.

[0014] In an optional embodiment, an adjusting mechanism is further included, wherein the adjusting mechanism is disposed on the vehicle door and is suitable for driving the limiting column to leave the second position.

[0015] Beneficial effects: By setting an adjustment mechanism to drive the limit column instead of the driver manually pushing the limit column, the optional range of operating positions is improved. For example, the operating end of the adjustment mechanism is set at a position that is easier for the driver to reach, thereby improving operational convenience. In addition, when the vehicle door tends to close due to factors such as wind or gravity, the limit column is not easy to move due to the large pressure between the limit hole. Operating the limit column through the adjustment mechanism can reduce the possibility of driver's operating inconvenience or hand scratches.

[0016] In an optional embodiment, the adjustment mechanism includes a flexible cable, a ratchet and a clamping structure, the first end of the flexible cable is connected to the limiting column, and the second end is connected to the ratchet, the ratchet is rotationally connected to the vehicle door and has a first clamping end, the ratchet has a first clamping position, when the ratchet rotates to the first clamping position, the flexible cable pulls the limiting column to the first position, and the clamping structure abuts against the first clamping end and limits the rotation of the ratchet, and a reset mechanism is provided on the vehicle door, and the reset mechanism is suitable for releasing the limit of the ratchet by the clamping structure.

[0017] Beneficial effect: The limit column can be pulled to move by connecting the flexible cable to the limit column, so that the limit column is disengaged from the second position. By setting a ratchet and connecting the second end of the flexible cable to the ratchet, the flexible cable can be pulled when the ratchet rotates, thereby pulling the limit column. The ratchet is provided with a first clamping end, and the door is provided with a clamping structure. The clamping structure abuts against the first clamping end to limit the ratchet, thereby keeping the limit column in the first position, preventing the door from being opened again and automatically locked under the action of wind. In addition, the resistance to closing the door is reduced, and the wear between the limit part and the rotating rod is reduced, further improving the practicality of the structure.

[0018] In an optional embodiment, the clamping structure includes a clamping block and a positioning column, the clamping block is rotationally cooperated with the vehicle door and is suitable for abutting against the first clamping end, and the positioning column is located on one side of the clamping block and is suitable for limiting the clamping block when the clamping block abuts against the first clamping end.

[0019] Beneficial effect: the clamping block can rotate, so as to give way to the first clamping end during the rotation process of the ratchet pulling the flexible rope, and when the ratchet has a tendency to reverse, the clamping block is limited by the positioning column and cannot rotate to give way, so that it abuts against the first clamping end of the ratchet, thereby limiting the ratchet, and the structure is simple and ingenious.

[0020] In an optional embodiment, the reset mechanism includes a mounting frame, a connecting column, a limit spring and a reset button, the mounting frame is fixedly mounted on the vehicle door, the connecting column is mounted on the mounting frame, the clamping block is rotationally coordinated with the vehicle door by rotationally cooperating with the connecting column, and the clamping block can slide along the axial direction of the connecting column, the reset button is connected to the clamping block, and when the reset button is pressed, the clamping block moves along the axial direction of the connecting column until it is misaligned with the ratchet, and the limit spring is sleeved on the connecting column and is suitable for pushing the clamping block and the reset button to reset.

[0021] Beneficial effect: Since the block is rotatably connected to the connecting column, when the connecting column is displaced axially along the connecting column and misaligned with the ratchet under the action of the reset button, the block naturally releases the limit on the ratchet. At this time, the flexible cable pulls the ratchet to rotate under the action of the reset spring, so that the ratchet is out of the position where it can be limited by the block; after the reset button is released, the limit spring abutting against the mounting frame pushes the block to reset, thereby preparing for the next positioning of the ratchet.

[0022] In an optional embodiment, the ratchet has a second clamping position and a second clamping end, the limiting column has a third position, and a friction pad is provided on the limiting column, when the limiting column is located at the third position, the friction pad presses against the rotating rod and limits the rotating rod, when the ratchet rotates to the second clamping position, the second clamping end abuts against the clamping structure, and the limiting column is located at the third position.

[0023] Beneficial effect: when the ratchet rotates to the second clamping end and cooperates with the clamping block, the limit column is in the third position. At this time, the friction pad presses against the surface of the rotating rod, thereby preventing the relative movement between the limit column and the rotating rod through friction resistance, and then limiting the door. Since this limit does not depend on the cooperation between the upper limit end of the limit column and the limit hole, the door can be limited at any rotation angle. The driver can conveniently control the opening and maintaining angle of the door, thereby improving practicality.

[0024] In the second aspect, the utility model also provides an operating machinery, including: a cab; a door frame fixedly connected to the cab; a door hingedly matched with the door frame; the above-mentioned operating machinery door limiting structure, the rotating rod is rotatably connected to the door frame, and the limiting column is telescopically installed on the door.

[0025] Beneficial effects: By providing a door limit structure on the operating machinery, the door can be kept in an open state when the operating machinery is on an uneven road or in windy weather, thereby improving the practicality of the operating machinery. In addition, the door limit structure allows the driver to limit the door with one hand, or release the door with one hand, which is very convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the overall structure of a door limiting structure for a working machine according to an embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of a limiting structure for a door of a working machine according to an embodiment of the utility model, which is used to reflect the limiting column structure;

[0029] Figure 3 This is a schematic diagram of a door limit structure of a working machine according to an embodiment of the utility model, which is used to reflect the structure of the adjustment mechanism;

[0030] Figure 4 for Figure 3 Schematic diagram from another perspective;

[0031] Figure 5 This is a schematic diagram of a door limit structure of a working machine according to an embodiment of the utility model, which is used to reflect the position structure of a reset button and a rotating handle;

[0032] Figure 6 This is a schematic diagram of the exploded structure of a door limit structure of a working machine according to an embodiment of the utility model, which is used to reflect the structures of various components of the adjustment mechanism.

[0033] Description of reference numerals:

[0034] 100, rotating rod; 101, sliding groove; 102, limiting hole; 200, limiting column; 201, head; 202, neck; 203, limiting part; 300, mounting seat; 400, connecting seat; 401, reset spring; 500, adjusting mechanism; 501, flexible rope; 502, ratchet; 5021, first clamping end; 5022, second clamping end; 503, clamping structure; 5031, clamping block; 5032, positioning column; 504, rotating handle; 600, reset mechanism; 601, mounting frame; 602, connecting column; 603, limiting spring; 604, reset button; 700, friction pad; 800, door frame; 900, vehicle door; 901, first limiting seat; 902, second limiting seat; 903, guide groove. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, 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 a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0036] Combine the following Figures 1 to 6 , describing an embodiment of the utility model.

[0037] According to an embodiment of the present utility model, on the one hand, a working machine door limiting structure is provided, see Figure 1 and Figure 2 , wherein the working machine includes a door frame 800 and a vehicle door 900 installed on the door frame 800, and the working machine door limiting structure includes: a rotating rod 100, a first end of the rotating rod 100 is rotatably connected to the door frame 800, and when the vehicle door 900 is opened to a preset angle, the rotating rod 100 rotates to a preset position; a limiting column 200, installed on the vehicle door 900, having a first position and a second position, when the limiting column 200 is located at the first position, the limiting column 200 slides with the rotating rod 100, and when the limiting column 200 is located at the second position, the limiting column 200 is located at the second end of the rotating rod 100 and locks the rotating rod 100 at the preset position.

[0038] Specifically, the present embodiment does not limit the specific rotational connection structure between the rotating rod 100 and the door frame 800. The rotating rod 100 can be rotationally connected to the mounting base 300 fixed on the door frame 800 through a pin, or can be rotationally connected to the door frame 800 through other forms.

[0039] In addition, specifically, the present embodiment does not restrict the specific cooperation form between the rotating rod 100 and the vehicle door 900, and the rotating rod 100 and the vehicle door 900 can satisfy the synchronous and coupled movement. Exemplarily, the second end of the rotating rod 100 is connected to the vehicle door 900 by cooperating with the limiting column 200. When the vehicle door 900 rotates, the rotating rod 100 rotates accordingly. In this state, the limiting column 200 is in the first position and the rotating rod 100 slides relative to the limiting column 200. When the vehicle door 900 rotates to a preset angle, such as the maximum door opening angle, the rotating rod 100 rotates to the preset position accordingly. In this state, the limiting column 200 locks the rotating rod 100 by moving to the second position, and then limits the position of the vehicle door 900 by locking the position of the limiting column 200.

[0040] It should be noted that the present embodiment does not restrict the specific structure of the limit column 200 and the specific installation method with the vehicle door 900, and ensures that the limit column 200 can switch between the first position and the second position, and can slide and cooperate with the rotating rod 100 when the limit column 200 is in the first position, and can lock the rotating rod 100 in a preset position when the limit column 200 is in the second position.

[0041] In this embodiment, when the vehicle door 900 is not at a preset angle, the limit post 200 is in the first position and slidingly cooperates with the rotating rod 100. At this time, the rotating rod 100 can rotate, thereby not hindering the movement of the vehicle door 900; when the vehicle door 900 is opened to a preset angle, a rotating rod 100 is provided that is rotatably connected to the door frame 800 and rotates with the vehicle door 900, and a limit post 200 located in the second position that can lock the rotating rod 100 in a preset position is provided on the vehicle door 900, so that a triangular support structure is formed between the vehicle door 900, the rotating rod 100 and the door frame 800, so that the vehicle door 900 remains in an open state; the user can adjust the position of the limit post 200 with one hand to switch the limit post 200 between the first position and the second position, thereby completing the limiting and releasing of the vehicle door 900, and the operation is convenient and quick.

[0042] In one embodiment, a mounting seat 300 is provided on the door frame 800, and a rotating rod 100 is rotatably connected to the mounting seat 300. The rotating rod 100 is provided with a slide groove 101 extending along its length direction and a limiting hole 102 connected to the slide groove 101 and located at the second end of the rotating rod 100. The diameter of the limiting hole 102 is larger than the groove width of the slide groove 101. When the limiting column 200 is in the first position, the limiting column 200 is slidably matched with the slide groove 101. When the limiting column 200 is in the second position, the limiting column 200 is located in the limiting hole 102 and matches the limiting hole 102.

[0043] In this embodiment, the rotating rod 100 is rotatably connected to the door frame 800 through the mounting seat 300, and has a simple structure and is easy to assemble. The rotating rod 100 is provided with a slide groove 101 and a limit hole 102, and the diameter of the limit hole 102 is larger than the slide groove 101. The limit column 200 can be slidably connected by cooperating with the slide groove 101, and the limit column 200 can also cooperate with the limit hole 102 to lock the rotating rod 100. The rotating rod 100 has a simple structure, low cost and reliable function.

[0044] In one embodiment, a connecting seat 400 is provided on the vehicle door 900, and a limiting column 200 is telescopically installed on the connecting seat 400. The specific structure of the limiting column 200 includes a head 201, a neck 202 and a limiting portion 203. When the limiting column 200 is located in the first position, the neck 202 slides in cooperation with the slide groove 101, and the diameter of the limiting portion 203 is greater than the groove width of the slide groove 101. When the limiting column 200 is located in the second position, the limiting portion 203 is located in the limiting hole 102 to lock the rotating rod 100 in a preset position, and the diameter of the head 201 is greater than the diameter of the limiting hole 102.

[0045] Specifically, this embodiment does not limit the specific structure of the various parts of the limit column 200. The head 201, neck 202 and limit portion 203 of the limit column 200 can all be cylindrical and coaxially arranged. In some embodiments not shown, the limit column 200 can also have a circular head 201, a prismatic neck 202, and a cubic limit portion 203, and the three are distributed in sequence along a straight line. The various parts of the limit column 200 can also be structures of other shapes.

[0046] In addition, specifically, the connection seat 400 can be connected to the vehicle door 900 by welding. In some embodiments not shown, the connection seat 400 can also be installed on the vehicle door 900 by connecting members, including but not limited to screws, bolts, etc. The head 201 and the limiting portion 203 of the limiting column 200 are located at both ends of the limiting column 200 and are connected by the neck 202. A sliding rod (not shown in the figure) is fixedly connected to the side of the limiting portion 203 of the limiting column 200 away from the head 201. A through hole adapted to the sliding rod is opened on the connection seat 400. The sliding rod cooperates with the through hole so that the limiting column 200 can be telescopically installed on the connection seat 400.

[0047] It should be noted that the limiting column 200 switches between the first position and the second position by telescopically cooperating with the connecting seat 400. When the limiting column 200 is in the first position, the neck 202 is located inside the slide slot 101, and the limiting portion 203 is located at the lower side of the slide slot 101. When the rotating rod 100 moves to the preset position as the door 900 opens to the preset angle, the limiting hole 102 is opposite to the limiting column 200, so that the limiting column 200 can move to the second position. When the limiting column 200 moves from the first position to the second position, the limiting portion 203 rises and enters the limiting hole 102, and the neck 202 is located at the upper side of the limiting hole 102.

[0048] In this embodiment, since the limiting column 200 includes a head 201, a neck 202 and a limiting portion 203, the head 201 has the largest diameter, thereby preventing the limiting column 200 from completely passing through the limiting hole 102 and thus being separated from the rotating rod 100, thereby reducing the possibility of structural failure; the neck 202 is adapted to the slide groove 101, and the limiting portion 203 is adapted to the limiting hole 102 and cannot enter the slide groove 101, thereby realizing the function of sliding cooperation between the limiting column 200 and the rotating rod 100 when the limiting column 200 is in the first position, and cooperating with the limiting hole 102 to lock the rotating rod 100 when the limiting column 200 is in the second position.

[0049] It should be noted that in some of the above-mentioned embodiments, a rotating shaft is rotatably connected to the mounting base 300, and a hole adapted to the rotating shaft is opened at the first end of the rotating rod 100 and is sleeved on the rotating shaft, so that the rotating rod 100 can rotate around the rotating shaft as the axis and can also slide up and down along the axis of the rotating shaft, so that the driver can adjust the relative position of the rotating rod 100 and the limiting column 200 by lifting the rotating rod 100, and then manually disengage the limiting hole 102 located at the second end of the rotating rod 100 from the limiting portion 203 of the limiting column 200, thereby unlocking the vehicle door 900.

[0050] In one embodiment, a first limit seat 901 is provided on the vehicle door 900 at the lower side of the connecting seat 400, and a return spring 401 is provided on the first limit seat 901. One end of the return spring 401 away from the first limit seat 901 abuts against the limit column 200 and is suitable for pushing the limit column 200 from the first position to the second position.

[0051] Specifically, the first limit seat 901 is fixedly connected to the vehicle door 900 by welding, and the reset spring 401 can be welded on the first limit seat 901 to achieve the positioning of the reset spring 401 itself. Alternatively, the sliding rod can be divided into two sections, the upper section slidingly cooperates with the through hole, the diameter of the lower section is smaller than the diameter of the upper section, and the reset spring 401 is sleeved on the lower section of the sliding rod and abuts against the end of the upper section, thereby achieving the positioning of the reset spring 401.

[0052] In this embodiment, a return spring 401 is provided. When the driver opens the vehicle door 900 and the vehicle door 900 rotates to a preset position, the return spring 401 automatically pushes the limit column 200 from the first position to the second position, so that the limit column 200 locks the rotating rod 100, thereby limiting the vehicle door 900, further simplifying the operation of limiting the vehicle door 900 and improving convenience.

[0053] It should be noted that in some embodiments not shown, a limit rod (not shown in the figure) perpendicular to the sliding rod is provided on the circumferential side wall of the sliding rod, the length of the limit rod is greater than the diameter of the through hole and the limit rod is located at the lower side of the through hole, thereby preventing the reset spring 401 from excessively pushing the limit column 200, causing the limit portion 203 to disengage from the limit hole 102.

[0054] In one embodiment, an adjusting mechanism 500 is further included. The adjusting mechanism 500 is disposed on the vehicle door 900 and is suitable for driving the limiting column 200 to leave the second position.

[0055] It should be noted that the present embodiment does not limit the specific form of the adjustment mechanism 500 , and the adjustment mechanism 500 only needs to be able to drive the limiting column 200 to move out of the second position.

[0056] In this embodiment, an adjustment mechanism 500 is provided to drive the limit column 200 instead of the driver manually pushing the limit column 200, thereby improving the optional range of the operating position. For example, the operating end of the adjustment mechanism 500 is provided at a position that is more easily accessible to the driver, thereby improving the operational convenience. In addition, when the vehicle door 900 tends to close due to factors such as wind or gravity, the limit column 200 is not easy to move due to the large pressure between it and the limit hole 102. By operating the limit column 200 through the adjustment mechanism 500, the possibility of inconvenience in operation for the driver or scratches on his hands can be reduced.

[0057] See also Figures 3 to 6 In one embodiment, the adjustment mechanism 500 includes a flexible cable 501, a ratchet 502 and a clamping structure 503. The first end of the flexible cable 501 is connected to the limiting column 200, and the second end is connected to the ratchet 502. The ratchet 502 is rotatably connected to the vehicle door 900 and has a first clamping end 5021. The ratchet 502 has a first clamping position. When the ratchet 502 rotates to the first clamping position, the flexible cable 501 pulls the limiting column 200 to the first position, and the clamping structure 503 abuts against the first clamping end 5021 and limits the rotation of the ratchet 502. A reset mechanism 600 is provided on the vehicle door 900. The reset mechanism 600 is suitable for releasing the limit of the ratchet 502 by the clamping structure 503.

[0058] Specifically, the first end of the flexible cable 501 passes through the first limiting seat 901 and the inner side of the return spring 401 and is connected to the end of the slide bar away from the limiting column 200. The vehicle door 900 is provided with a second limiting seat 902 on the side of the ratchet 502 close to the first limiting seat 901, and a guide groove 903 for limiting and guiding the flexible cable 501 is provided on the second limiting seat 902.

[0059] In addition, specifically, a rotating handle 504 is provided on the vehicle door 900. The present embodiment does not specifically limit the installation method of the rotating handle 504. Exemplarily, the rotating handle 504 may be located on the side of the vehicle door 900 opposite to the ratchet 502. In this case, a connecting shaft is provided on the rotating handle 504, which passes through the vehicle door 900 and is coaxially fixedly connected to the ratchet 502. In some embodiments not shown, the rotating handle 504 may also be located on the same side of the vehicle door 900 as the ratchet 502. In this case, the rotating handle 504 is directly coaxially fixedly installed on the ratchet 502.

[0060] In this embodiment, the flexible cable 501 is connected to the limiting column 200 so as to pull the limiting column 200 to move, so that the limiting column 200 is disengaged from the second position. By providing a ratchet 502 and connecting the second end of the flexible cable 501 to the ratchet 502, the flexible cable 501 can be pulled when the ratchet 502 rotates, thereby pulling the limiting column 200. The ratchet 502 is provided with a first clamping end 5021, and the door 900 is provided with a clamping structure 503. The clamping structure 503 abuts against the first clamping end 5021 to limit the ratchet 502, thereby keeping the limiting column 200 in the first position, preventing the door 900 from opening again under the action of wind or gravity and automatically locking under the action of the return spring 401. In addition, the resistance of closing the door 900 is reduced, and the wear between the limiting part 203 and the rotating rod 100 is reduced, further improving the practicality of the structure.

[0061] In one embodiment, the clamping structure 503 includes a clamping block 5031 and a positioning column 5032. The clamping block 5031 is rotatably matched with the vehicle door 900 and is suitable for abutting against the first clamping end 5021. The positioning column 5032 is located on one side of the clamping block 5031 and is suitable for limiting the clamping block 5031 when the clamping block 5031 abuts against the first clamping end 5021.

[0062] In this embodiment, the clamping block 5031 can rotate, so as to give way to the first clamping end 5021 during the rotation process of the ratchet 502 pulling the flexible rope 501, and when the ratchet 502 has a tendency to reverse, the clamping block 5031 is limited by the positioning column 5032 and cannot rotate to give way, so that it abuts against the first clamping end 5021 of the ratchet 502, thereby limiting the ratchet 502. The structure is simple and ingenious.

[0063] In one embodiment, the reset mechanism 600 includes a mounting frame 601, a connecting column 602, a limit spring 603 and a reset button 604. The mounting frame 601 is fixedly mounted on the vehicle door 900, the connecting column 602 is mounted on the mounting frame 601, the block 5031 is rotationally coordinated with the vehicle door 900 by rotating with the connecting column 602, and the block 5031 can slide axially along the connecting column 602, the reset button 604 is connected to the block 5031, and when the reset button 604 is pressed, the block 5031 moves axially along the connecting column 602 until it is misaligned with the ratchet 502, and the limit spring 603 is sleeved on the connecting column 602 and is suitable for pushing the block 5031 and the reset button 604 to reset.

[0064] In this embodiment, since the block 5031 is rotatably connected to the connecting column 602, when the connecting column 602 is axially displaced along the connecting column 602 and misaligned with the ratchet 502 under the action of the reset button 604, the block 5031 naturally releases the limit on the ratchet 502. At this time, the flexible cable 501 pulls the ratchet 502 to rotate under the action of the reset spring 401, so that the ratchet 502 is out of the position where it can be limited by the block 5031; after the reset button 604 is released, the limit spring 603 abutting against the mounting frame 601 pushes the block 5031 to reset, and pushes the limit spring 603 to reset, thereby preparing for the next positioning of the ratchet 502.

[0065] In one embodiment, the ratchet 502 has a second clamping position and has a second clamping end 5022, the limiting column 200 has a third position, and a friction pad 700 is provided on the limiting column 200. When the limiting column 200 is located at the third position, the friction pad 700 presses against the rotating rod 100 and limits the rotating rod 100. When the ratchet 502 rotates to the second clamping position, the second clamping end 5022 abuts against the clamping structure 503, and the limiting column 200 is located at the third position.

[0066] Specifically, the third position of the limiting column 200 is located at a side of the second position away from the first position. When the limiting column 200 is located at the third position, the neck 202 of the limiting column 200 is located in the sliding groove 101 .

[0067] In this embodiment, when the ratchet 502 rotates to the point where the second clamping end 5022 cooperates with the clamping block 5031, the limiting column 200 is located in the third position. At this time, the friction pad 700 presses against the surface of the rotating rod 100, thereby preventing the relative movement between the limiting column 200 and the rotating rod 100 through friction resistance, thereby limiting the vehicle door 900. Since this limitation does not depend on the cooperation between the upper limit end of the limiting column 200 and the limiting hole 102, the vehicle door 900 can be limited at any rotation angle, and the driver can conveniently control the opening and maintaining angle of the vehicle door 900, thereby improving practicality.

[0068] In some of the above-mentioned embodiments, specifically, the first clamping end 5021 and the second clamping end 5022 are both protruding portions located in the circumference of the ratchet 502. Since the clamping block 5031 is rotatably connected to the connecting column 602, when the ratchet 502 rotates in the direction in which the flexible cable 501 tightens the limiting column 200, the clamping block 5031 deflects and gives way to the protruding portion, so that the protruding portion can smoothly pass through the clamping block 5031. When the ratchet 502 has a tendency to reverse, the positioning column 5032 prevents the clamping block 5031 from deflecting in the opposite direction with the protruding portion, thereby preventing the protruding portion from passing through, thereby achieving the limitation of the ratchet 502.

[0069] According to an embodiment of the utility model, on the other hand, a working machine is also provided, including: a cab; a door frame 800, fixedly connected to the cab; a door 900, hingedly matched with the door frame 800; the above-mentioned working machine door limiting structure, the rotating rod 100 is rotatably connected to the door frame 800, and the limiting column 200 is telescopically installed on the door 900.

[0070] It should be noted that the operating machinery includes but is not limited to excavators, cranes or pile drivers.

[0071] In this embodiment, by providing a working machine door limiting structure on the working machine, the door 900 can be kept in an open state when the working machine is on an uneven road or in windy weather, thereby improving the practicality of the working machine. In addition, the door 900 limiting structure allows the driver to limit the door 900 with one hand, or release the limit of the door 900 with one hand, which is very convenient and quick.

[0072] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A door limiting structure for a working machine, wherein: The working machine comprises a door frame (800) and a door (900) installed on the door frame (800), wherein the door limiting structure of the working machine comprises: A rotating rod (100), a first end of which is rotatably connected to the door frame (800), and when the vehicle door (900) is opened to a preset angle, the rotating rod (100) rotates to a preset position; A limiting column (200) is installed on the vehicle door (900) and has a first position and a second position. When the limiting column (200) is located at the first position, the limiting column (200) is slidably matched with the rotating rod (100). When the limiting column (200) is located at the second position, the limiting column (200) is located at the second end of the rotating rod (100) and locks the rotating rod (100) at the preset position.

2. The door limiting structure of the working machine according to claim 1, characterized in that: The door frame (800) is provided with a mounting seat (300), the rotating rod (100) is rotatably connected to the mounting seat (300), the rotating rod (100) is provided with a slide groove (101) extending along its length direction and a limiting hole (102) connected to the slide groove (101) and located at the second end of the rotating rod (100), the diameter of the limiting hole (102) is larger than the groove width of the slide groove (101), when the limiting column (200) is located in the first position, the limiting column (200) is slidably matched with the slide groove (101), and when the limiting column (200) is located in the second position, the limiting column (200) is located in the limiting hole (102).

3. The door limiting structure of the working machine according to claim 2, characterized in that: The vehicle door (900) is provided with a connecting seat (400), and the limiting column (200) is telescopically installed on the connecting seat (400), and the limiting column (200) comprises a head (201), a neck (202) and a limiting portion (203). When the limiting column (200) is located at the first position, the neck (202) is slidably matched with the slide groove (101), and the diameter of the limiting portion (203) is greater than the groove width of the slide groove (101). When the limiting column (200) is located at the second position, the limiting portion (203) is located in the limiting hole (102) to lock the rotating rod (100) at the preset position, and the diameter of the head (201) is greater than the diameter of the limiting hole (102).

4. The door limiting structure of the working machine according to claim 3, characterized in that: A first limiting seat (901) is provided on the vehicle door (900) at the lower side of the connecting seat (400), and a return spring (401) is provided on the first limiting seat (901). One end of the return spring (401) away from the first limiting seat (901) abuts against the limiting column (200) and is suitable for pushing the limiting column (200) from the first position to the second position.

5. The door limiting structure of a working machine according to any one of claims 1 to 4, characterized in that: It also includes an adjustment mechanism (500), which is arranged on the vehicle door (900) and is suitable for driving the limiting column (200) to leave the second position.

6. The door limiting structure of the working machine according to claim 5, characterized in that: The adjustment mechanism (500) comprises a flexible cable (501), a ratchet (502) and a clamping structure (503); a first end of the flexible cable (501) is connected to the limiting column (200), and a second end is connected to the ratchet (502); the ratchet (502) is rotatably connected to the vehicle door (900) and has a first clamping end (5021); the ratchet (502) has a first clamping position; when the ratchet (502) rotates to the first clamping position, the flexible cable (501) pulls the limiting column (200) to the first position, and the clamping structure (503) abuts against the first clamping end (5021) and restricts the rotation of the ratchet (502); a reset mechanism (600) is provided on the vehicle door (900); the reset mechanism (600) is suitable for releasing the limit of the ratchet (502) by the clamping structure (503).

7. The door limiting structure of a working machine according to claim 6, characterized in that: The clamping structure (503) includes a clamping block (5031) and a positioning column (5032); the clamping block (5031) is rotationally matched with the vehicle door (900) and is suitable for abutting against the first clamping end (5021); the positioning column (5032) is located on one side of the clamping block (5031) and is suitable for limiting the clamping block (5031) when the clamping block (5031) abuts against the first clamping end (5021).

8. The door limiting structure of a working machine according to claim 7, characterized in that: The reset mechanism (600) comprises a mounting frame (601), a connecting column (602), a limit spring (603) and a reset button (604); the mounting frame (601) is fixedly mounted on the vehicle door (900); the connecting column (602) is mounted on the mounting frame (601); the clamping block (5031) is rotationally matched with the connecting column (602) to rotate with the vehicle door (900); and the clamping block (5031) The connecting column (602) can slide axially, and the reset button (604) is connected to the block (5031). When the reset button (604) is pressed, the block (5031) moves axially along the connecting column (602) until it is misaligned with the ratchet (502). The limit spring (603) is sleeved on the connecting column (602) and is suitable for pushing the block (5031) and the reset button (604) to reset.

9. The working machine door limiting structure according to claim 6, characterized in that: The ratchet (502) has a second clamping position, the ratchet (502) has a second clamping end (5022), the limiting column (200) has a third position, the limiting column (200) is provided with a friction pad (700), when the limiting column (200) is located at the third position, the friction pad (700) presses against the rotating rod (100) and limits the rotating rod (100), when the ratchet (502) rotates to the second clamping position, the second clamping end (5022) abuts against the clamping structure (503), and the limiting column (200) is located at the third position.

10. A working machine, characterized in that: include: Cab; A door frame (800) fixedly connected to the cab; A vehicle door (900) is hingedly connected to the door frame (800); In the working machine door limiting structure according to any one of claims 1 to 9, the rotating rod (100) is rotatably connected to the door frame (800), and the limiting column (200) is telescopically mounted on the door (900).

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