Limiting mechanism and operating machinery for pivoting gate

Abstract

This utility model provides a limiting mechanism and operating machine for a pivoting door. The limiting mechanism includes a limiting plate with a sliding groove, which is rotatably connected to either a frame or a door via a first pivot shaft. The sliding groove includes a guide section extending radially along the rotation of the limiting plate and a limiting groove located at the radially distal end; a limiting pin, which is installed on the other of the frame and the door and slides in cooperation with the sliding groove; and a torsion spring, which is installed on the first pivot shaft and acts elastically on the limiting plate through a first support arm. With this technical solution, as the door rotates towards the open state, the limiting plate rotates around the first pivot shaft, and the limiting pin slides radially distally along the guide section of the sliding groove. When the limiting pin moves to the limiting groove, the limiting plate rotates under the action of the torsion spring, causing the limiting pin to fall into the limiting groove, thus restricting the rotation of the door towards the closed state and keeping it in the open state. This effectively improves the convenience and stability of the door limiting operation.

Description

Technical Field

[0001] This utility model relates to the field of operating machinery technology, and in particular to a limiting mechanism for a pivoting gate and operating machinery. Background Technology

[0002] To meet maintenance requirements, the doors on the machine body that serve a maintenance function need to remain fixed in position after being opened to a certain angle, so that operators can carry out maintenance work. Taking skid steer loaders as an example, because the rear hatch of a skid steer loader is heavy and also has auxiliary devices such as fuel tanks installed on it, the overall weight is relatively large. Therefore, a rear door limit mechanism is set up to keep the door in a fixed position after it is opened, so as to facilitate maintenance.

[0003] However, the existing limit mechanism uses a pin-type manual insertion and removal limit, so both opening and closing the rear door require manual limit operation. If the operator forgets to manually lock the rear door during maintenance, the door's movement can easily cause injury. In some cases, if the rear door abnormally unlocks or the operator fails to effectively lock the rear door while operating the equipment, the rear door may rotate around the hinge due to inertia, causing damage to the frame, the rear door, and accessories mounted on the rear door. Utility Model Content

[0004] One of the technical problems to be solved by this utility model is: how to provide a door limiting mechanism that is easy to operate and has a stable limiting effect.

[0005] To solve the above-mentioned technical problems, this utility model provides a limiting mechanism for a pivoting door. The door is pivotally connected to a frame via a hinge mechanism to rotate between a closed state and an open state. The limiting mechanism includes: a limiting plate having a groove formed thereon and rotatably connected to one of the frame and the door via a first pivot shaft; the groove including a guide section extending radially along the rotation of the limiting plate and a limiting groove located at the radially distal end; a limiting pin installed on the other of the frame and the door and slidingly engaging with the groove; and a torsion spring installed on the first pivot shaft and elastically acting on the limiting plate via a first support arm, so as to prevent the door from rotating to the closed state when the door is in the open state by causing the limiting pin to be located in the limiting groove.

[0006] In some embodiments, the limiting plate is rotatably connected to the frame, and the limiting pin is mounted on the door body and can slide along the slide groove during door body rotation.

[0007] In some embodiments, the torsion spring is configured to elastically act on the limiting plate along the opening direction of the door, so as to drive the limiting plate to rotate when the door is opened to a predetermined position, and cause the limiting pin to enter the limiting groove.

[0008] In some embodiments, the frame is provided with a frame connecting plate, and a first pivot is configured as a pivot bolt extending through the frame connecting plate and the limiting plate, and its axial position is defined by a first locking nut connected to one end of the pivot bolt.

[0009] In some embodiments, the torsion spring includes a spring body, a first arm, and a second arm. The spring body is sleeved on the pivot bolt, the second arm is connected to the frame connecting plate, and the first arm elastically abuts against one side of the limiting plate.

[0010] In some embodiments, the frame connecting plate is provided with an arm insertion hole for inserting a second arm, and one side of the limiting plate is provided with an arm groove for engaging with the first arm.

[0011] In some embodiments, a limit pin mounting plate is provided on the door body, and the limit pin is disposed on the limit pin mounting plate.

[0012] In some embodiments, the limiting pin is configured as a limiting bolt extending through the limiting pin mounting plate and the limiting plate, the limiting bolt being connected to a second locking nut for defining its axial position.

[0013] In some embodiments, the hinge mechanism includes a female hinge assembly disposed on a frame and a male hinge assembly disposed on the door body and hinged to the female hinge assembly via a second pivot axis.

[0014] This utility model also provides a working machine, which includes a door that is pivotally connected to the body of the vehicle via a hinge mechanism, and the aforementioned limiting mechanism is provided between the body of the vehicle and the door.

[0015] Through the above technical solution, the pivotal door limiting mechanism and operating machine provided by this utility model allow the limiting plate to rotate around the first pivot axis during the rotation of the door from the closed state to the open state. At the same time, the limiting pin slides radially to the far end along the guide section of the slide groove. When the limiting pin moves to the limiting groove, the limiting plate rotates under the action of the torsion spring, causing the limiting pin to fall into the limiting groove, thus restricting the rotation of the door to the closed state and keeping it in the open state. This effectively improves the convenience and stability of the door limiting operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the limiting mechanism of this utility model;

[0018] Figure 2 This is an exploded view of the limiting mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the torsion spring of this utility model;

[0020] Figure 4 This is a schematic diagram of the limiting plate of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Limiting plate; 101. Support arm groove; 102. Connecting hole; 2. Slide groove; 201. Guide section; 202. Limiting groove; 3. Limiting pin; 4. Torsion spring; 401. Spring body; 402. Second support arm; 403. First support arm; 5. Frame; 6. Door body; 7. Frame connecting plate; 701. Support arm insertion hole; 8. Rotary shaft bolt; 9. First locking nut; 10. Limiting pin mounting plate; 11. Second locking nut; 12. Hinge female head; 13. Hinge male head. Detailed Implementation

[0023] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to exemplarily illustrate the principles of this utility model, but should not be used to limit the scope of this utility model. This utility model can be implemented in many different forms and is not limited to the specific embodiments described herein, but includes all technical solutions falling within the scope of the claims.

[0024] These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0025] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0027] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0028] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0030] like Figures 1-4 As shown, this utility model provides a limiting mechanism for a pivoting door. The door 6 is pivotally connected to the frame 5 via a hinge mechanism so that it can rotate between a closed state and an open state. The limiting mechanism includes: a limiting plate 1, which has a sliding groove 2 and is rotatably connected to one of the frame 5 and the door 6 via a first pivot shaft. The sliding groove 2 includes a guide section 201 extending radially along the rotation of the limiting plate 1 and a limiting groove 202 located at the radially distal end; a limiting pin 3, which is installed on the other of the frame 5 and the door 6 and slides in cooperation with the sliding groove 2; and a torsion spring 4, which is installed on the first pivot shaft and acts elastically on the limiting plate 1 via a first support arm 403 so that when the door 6 is in the open state, the limiting pin 3 is located in the limiting groove 202, thereby preventing the door 6 from rotating to the closed state.

[0031] Specifically, during the rotation of the door 6 from the closed state to the open state, the limiting plate 1 rotates around the first pivot axis under the drive of the door 6, while the limiting pin 3 located in the guide section 201 of the slide groove 2 slides radially to the far end of the first pivot axis. Under the elastic action of the first arm 403 of the torsion spring 4, during the radial sliding of the limiting pin 3 relative to the limiting plate 1, the limiting pin 3 remains in close contact with the inner wall of the slide groove 2 until it slides to the limiting groove 202. At this point, the limiting plate 1 rotates further under the action of the torsion spring 4, causing the limiting pin 3 to fall into the limiting groove 202, thereby restricting the rotation of the door 6 in the closing direction and keeping it in the open state. This achieves automatic limiting of the door 6, which effectively improves the convenience of the limiting operation compared to the manual insertion and removal limiting in the prior art. The limiting groove 202 is a recess located at the radially distal end of the slide groove 2 and offset from the extending direction of the guide section 201. When the limiting pin 3 slides to the limiting groove 202, it can generate a relative displacement with the limiting plate 1 that deviates from the radial direction. That is, the limiting plate 1 can rotate further under the action of the torsion spring 4 to allow the limiting pin 3 to enter the limiting groove 202, thereby realizing the automatic limiting of the door 6. In other embodiments, a stop block can also be set at the entrance of the limiting groove 202 to prevent the limiting pin 3 from sliding out of the limiting groove 202 due to equipment vibration, etc., so as to enhance the stability of the limiting effect.

[0032] In addition, due to the action of the torsion spring 4, the limiting pin 3 always stays close to the inner wall of the slide groove 2 during the sliding process in the guide section, making the opening and closing process of the door 6 more stable, avoiding abnormal noise during the opening and closing process, and improving the stability of the mechanism during operation; at the same time, after the limiting pin 3 enters the limiting groove 202, it can stay close to the bottom of the groove due to the action of the torsion spring 4, preventing the limiting pin 3 from disengaging from the limiting groove 202 due to equipment vibration, effectively improving the stability of the mechanism during limiting.

[0033] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the limiting plate 1 is rotatably connected to the frame 5, and the limiting pin 3 is installed on the door body 6 and can slide along the slide groove 2 during the rotation of the door body 6.

[0034] Specifically, the first pivot axis is located at the rotatable connection between the limiting plate 1 and the frame 5. During the opening of the door 6, the door 6 drives the limiting plate 1 to rotate relative to the first pivot axis through the limiting pin 3. At the same time, the limiting pin 3 prevents the limiting plate 1 from rotating further under the action of the torsion spring 4. When the limiting pin 3 slides to the radially distal end of the slide groove 2, that is, when the door 6 is at its maximum opening angle, the limiting plate 1 rotates further under the action of the torsion spring 4, causing the limiting pin 3 to enter the limiting groove 202 to limit the door 6. Alternatively, in other embodiments, the limiting plate 1 can be rotatably connected to the door 6, and the limiting pin 3 can be installed on the frame 5. When the door 6 is opened to the predetermined position, the torsion spring 4 acts to keep the limiting pin 3 within the limiting groove 202 of the limiting plate 1, which can also achieve the limiting effect in the open state.

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the torsion spring 4 is configured to elastically act on the limiting plate 1 along the opening direction of the door 6, so as to drive the limiting plate 1 to rotate when the door 6 is opened to a predetermined position, and cause the limiting pin 3 to enter the limiting groove 202.

[0036] Specifically, with Figure 1 For example, during the rotation towards the open state, the door 6 rotates counterclockwise. Similarly, the first arm 403 of the torsion spring 4 elastically acts on the limiting plate 1, causing the limiting plate 1 to rotate counterclockwise. The limiting groove 202, located at the radially distal end of the slide groove 2, extends in the opposite direction of this rotational trend relative to the guide section 201, that is, in a clockwise direction. When the limiting plate 1 rotates counterclockwise under the action of the torsion spring 4, the limiting pin 3 can enter the limiting groove 202 to achieve limiting. In other embodiments, the torsion spring 4 acting on the limiting plate 1 can also cause the limiting plate 1 to rotate clockwise. In this case, the limiting groove 202, located at the radially distal end of the slide groove 2, is also set to extend in the opposite direction of this trend relative to the guide section 201, that is, in a counterclockwise direction, so that the limiting pin 3 can also enter the limiting groove 202 to achieve limiting.

[0037] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the frame 5 is provided with a frame connecting plate 7, and the first pivot shaft is configured as a pivot bolt 8 extending through the frame connecting plate 7 and the limiting plate 1, and its axial position is defined by a first locking nut 9 connected to one end of the pivot bolt 8.

[0038] Specifically, to facilitate the installation and maintenance of the limiting mechanism, a frame connecting plate 7 for placing the limiting plate 1 is provided on the frame 5, and a rotatable connection is achieved by a rotating shaft bolt 8 passing through both. The limiting plate 1 has a connecting hole 102 for the rotating shaft bolt 8 to pass through, and the frame connecting plate 7 has a corresponding opening. Figure 1 and Figure 2 As shown, the planes of the frame connecting plate 7 and the limiting plate 1 are placed parallel to each other to facilitate relative rotation. After the limiting mechanism is installed, a first locking nut 9 is set at one end of the rotating shaft bolt 8, which, together with the bolt base at the other end, achieves axial limiting. The limiting plate 1 can be installed on the top of the frame connecting plate 7 or on the bottom of the frame connecting plate 7 via the rotating shaft bolt 8.

[0039] like Figures 1-4 As shown, in some embodiments, the torsion spring 4 includes a spring body 401, a first arm 403 and a second arm 402. The spring body 401 is sleeved on the pivot bolt 8, the second arm 402 is connected to the frame connecting plate 7, and the first arm 403 elastically abuts against one side of the limiting plate 1.

[0040] Specifically, the second arm 402 of the torsion spring 4 is mounted on the relatively fixed frame connecting plate 7, and its first arm 403 abuts against one side of the relatively rotatable limiting plate 1. When the torsion spring 4 is installed onto the rotating shaft bolt 8, an initial pre-torque is applied to it to maintain the rotational tendency of the limiting plate 1. Figure 1 and Figure 2 For example, before assembling the limiting mechanism, rotate the two arms of the torsion spring 4 clockwise so that it can always apply a counterclockwise force to the limiting plate 1 during the entire rotation of the door body 6, so as to ensure the stability of the radial sliding of the limiting pin 3 and realize the automatic limiting when the limiting pin 3 slides to the radial far end.

[0041] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the frame connecting plate 7 is provided with an arm insertion hole 701 for the second arm 402 to be inserted, and the side of the limiting plate 1 is provided with an arm groove 101 that engages with the first arm 403.

[0042] Specifically, to ensure that the torsion spring 4 can apply sufficient force to the limiting plate 1, a support arm insertion hole 701 is provided on the frame connecting plate 7. During installation, the second support arm 402 is inserted into the support arm insertion hole 701 to limit its displacement, so that the pre-torque of the torsion spring 4 is entirely applied to the limiting plate 1 through the first support arm 403. At the same time, the first support arm 403 fits into the support arm groove 101 located on one side of the limiting plate 1 to prevent the first support arm 403 from sliding relative to the limiting plate 1 and causing loss of pre-torque.

[0043] like Figure 1 and Figure 2 As shown, in some embodiments, the door body 6 is provided with a limit pin mounting plate 10, and the limit pin 3 is disposed on the limit pin mounting plate 10.

[0044] Specifically, to facilitate the installation and maintenance of the limiting mechanism, a limiting pin mounting plate 10 is provided on the door body 6. The limiting pin mounting plate 10 is connected to the limiting plate 1 by a limiting pin 3 passing through the slide groove 2. The plane of the limiting pin mounting plate 10 is parallel to the plane of the limiting plate 1 to facilitate relative rotation between the two. The limiting plate 1 can be installed on the top or bottom of the limiting pin mounting plate 10 via the limiting pin 3.

[0045] like Figure 1 and Figure 2 As shown, in some embodiments, the limiting pin 3 is configured as a limiting bolt extending through the limiting pin mounting plate 10 and the limiting plate 1, and the limiting bolt is connected to a second locking nut 11 for defining its axial position.

[0046] Specifically, during the installation of the limiting mechanism, the limiting pin 3 passes through the groove 2 formed on the limiting plate 1 and the limiting pin mounting plate 10, and a second locking nut 11 is provided at one end of it, which cooperates with the bolt base at the other end of it to achieve axial limiting. In other embodiments, the limiting pin 3 may also be a pin integrally formed with the limiting pin mounting plate 10.

[0047] like Figure 1 and Figure 2 As shown, in some embodiments, the hinge mechanism includes a female hinge head 12 mounted on the frame 5 and a male hinge head 13 mounted on the door body 6 and hinged to the female hinge head 12 via a second pivot axis. Specifically, the hinge mechanism, including the female hinge head 12, the male hinge head 13, and the second pivot axis, is used to bear the rotational load of the door body 6, while the limiting plate 1, the limiting pin 3, and the torsion spring 4 are used to limit the structure during the rotation of the door body 6.

[0048] This utility model also provides a working machine, which includes a door that is pivotally connected to the body of the vehicle via a hinge mechanism, and the aforementioned limiting mechanism is provided between the body of the vehicle and the door.

[0049] Specifically, during the process of opening the door of the work machinery, the limiting plate 1 rotates around the first pivot axis under the action of the door, and the limiting pin 3 slides radially to the far end along the guide section 201. When the limiting pin 3 slides to the limiting groove 202, the limiting plate 1 rotates further under the influence of the torsion spring 4, causing the limiting pin 3 to fall into the limiting groove 202, restricting the rotation of the door and keeping it in the open state, thereby realizing the automatic limiting of the door. When it is necessary to close the door, the limiting can be manually released. Compared with the existing technology where manual operation is required when opening and closing the door, the limiting operation is effectively simplified, avoiding the situation where the door is not locked due to human error. At the same time, the pre-torque of the torsion spring 4 also improves the operational stability of the limiting mechanism.

[0050] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement this technical solution based on the above description.

[0051] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A limiting mechanism for a pivoting door body, wherein the door body (6) is pivotally connected to a frame (5) via a hinge mechanism to be able to rotate between a closed state and an open state, characterized in that, The limiting mechanism includes: A limiting plate (1) having a groove (2) and rotatably connected to one of the frame (5) and the door (6) via a first pivot axis, the groove (2) including a guide section (201) extending radially along the rotation of the limiting plate (1) and a limiting groove (202) located at the radial distal end. A limiting pin (3), said limiting pin (3) is installed in the other of the frame (5) and the door body (6) and slides in cooperation with the slide groove (2); and, A torsion spring (4) is mounted on the first pivot shaft and acts elastically on the limiting plate (1) through the first arm (403) so that when the door (6) is in the open state, the limiting pin (3) is located in the limiting groove (202) to prevent the door (6) from rotating to the closed state.

2. The stopper mechanism for a pivoting door according to claim 1, wherein The limiting plate (1) is rotatably connected to the frame (5), and the limiting pin (3) is installed on the door body (6) and can slide along the slide groove (2) during the rotation of the door body (6).

3. The limiting mechanism of the pivotal door body according to claim 2, characterized in that, The torsion spring (4) is configured to elastically act on the limiting plate (1) along the opening direction of the door (6) so as to drive the limiting plate (1) to rotate when the door (6) is opened to a predetermined position, and cause the limiting pin (3) to enter the limiting groove (202).

4. The pivot door check mechanism of claim 1, wherein, The frame (5) is provided with a frame connecting plate (7), and the first pivot shaft is configured as a pivot bolt (8) extending through the frame connecting plate (7) and the limiting plate (1), and its axial position is limited by a first locking nut (9) connected to one end of the pivot bolt (8).

5. The stop mechanism for a pivoting door according to claim 4, wherein The torsion spring (4) includes a spring body (401), a first support arm (403) and a second support arm (402). The spring body (401) is sleeved on the rotating shaft bolt (8). The second support arm (402) is connected to the frame connecting plate (7). The first support arm (403) elastically abuts against one side of the limiting plate (1).

6. The stop mechanism for a pivoting door according to claim 5, wherein, The frame connecting plate (7) is provided with an arm insertion hole (701) for inserting the second arm (402), and the limiting plate (1) is provided with an arm groove (101) on one side for engaging with the first arm (403).

7. The pivot door check mechanism of claim 1, wherein, The door body (6) is provided with a limit pin mounting plate (10), and the limit pin (3) is provided on the limit pin mounting plate (10).

8. The stop mechanism for a pivoting door according to claim 7, wherein The limiting pin (3) is configured as a limiting bolt extending through the limiting pin mounting plate (10) and the limiting plate (1), and a second locking nut (11) is connected to the limiting bolt to define its axial position.

9. The stop mechanism for a pivoting door according to claim 1, wherein, The hinge mechanism includes a hinge female (12) disposed on the frame (5) and a hinge male (13) disposed on the door body (6) and hinged to the hinge female (12) via a second pivot axis.

10. A type of operating machinery, characterized in that, The operating machinery includes a door that is pivotally connected to the vehicle body via a hinge mechanism, and a limiting mechanism according to any one of claims 1-9 is provided between the vehicle body and the door.

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