Self-locking assembly, protective door and engineering machinery

Abstract

The utility model relates to the field of engineering machinery, and discloses a self-locking assembly, a protective door and engineering machinery, the self-locking assembly comprises a base, a limiting piece and a locking piece, the base is provided with a through groove which is through in the horizontal direction and provided with a groove opening facing forwards, the limiting piece is fixedly arranged on the base and located below the through groove, and the locking piece is located below the limiting piece. The rear end of the locking piece is hinged to the base through a hinge shaft, the hinge shaft is arranged behind the through groove, the axial direction of the hinge shaft is consistent with the through direction of the through groove, a lock hook is formed at the front end of the locking piece and is downwards lapped on the limiting piece, the lock hook and the through groove jointly form a locking space, and the end face of the lock hook forms a downward inclined face. According to the self-locking assembly, other tools are not needed in the locking and unlocking process, no component needs to be disassembled or assembled, and the self-locking assembly is good in simplicity, not prone to failure and high in reliability.

Description

Technical Field

[0001] The utility model belongs to the field of engineering machinery, and in particular relates to a self-locking component, a protective door and engineering machinery. Background Art

[0002] Engineering machinery, such as excavators, are usually provided with a protective structure that is enclosed on the outside to protect components such as engines, hydraulic devices, and electrical devices. The protective structure generally includes a protective door through which technicians inspect and repair components housed inside the protective structure.

[0003] The existing protective door mainly includes a door frame, a door body hinged on the door frame, and a locking mechanism arranged between the door frame and the door body, and the locking mechanism is used to lock the door body on the door frame. However, the locking mechanism of the existing protective door has the following defects: the locking and unlocking operations of the locking mechanism require the use of tools, and the fastening components such as bolts and pins need to be disassembled and assembled, the operation process is relatively cumbersome and inconvenient, and after frequent locking and unlocking, it is easy to fail and has low reliability. Utility Model Content

[0004] In view of the above-mentioned deficiencies or defects in the prior art, the utility model provides a self-locking component, a protective door and an engineering machinery, aiming to solve the technical problems that the locking mechanism of the existing protective door is complicated and inconvenient to operate and is prone to failure.

[0005] To achieve the above object, the utility model provides a self-locking component, which includes:

[0006] The base is provided with a through slot which runs through in a horizontal direction and faces forward;

[0007] A limiting member, fixedly disposed on the base and located below the through slot;

[0008] A locking piece, the rear end of which is hinged on the base via a hinge shaft, the hinge shaft is arranged behind the through slot and its axial direction is consistent with the through direction of the through slot, the front end of the locking piece is formed as a locking hook and rests downward on the limiting piece, the locking hook and the through slot together form a locking space and the end face is formed as a downwardly inclined surface.

[0009] Optionally, the hinge shaft is fixedly installed on the base, and the rear end of the locking member is formed as a collar and is rotatably mounted on the hinge shaft.

[0010] Optionally, an annular gasket is nested between the collar and the hinge shaft, the annular gasket and the hinge shaft are interference fit, and the annular gasket and the collar are clearance fit.

[0011] Optionally, the hinge shaft is configured as a bolt and is fixedly connected to the base via a nut.

[0012] Optionally, the base is configured as a plate-like structure and is arranged vertically, the through groove, the limiting member and the hinge shaft are all arranged at the bottom end of the base, and a first mounting groove is provided at the top end of the base.

[0013] The utility model also provides a protective door, the protective door comprising:

[0014] Door frame;

[0015] A door body, which is openably and closably arranged on the door frame;

[0016] The self-locking assembly described above, wherein the base is fixedly arranged on the top end of the door frame;

[0017] The pin shaft assembly includes a fixing seat fixedly arranged on the top end of the door body and a pin shaft fixedly arranged on the fixing seat. The pin shaft is arranged in alignment with the lock hook resting on the limiting member. During the closing process of the door body, the pin shaft contacts the end surface of the lock hook resting on the limiting member to lift the lock hook. After the door body is closed, the pin shaft is inserted into the locking space formed by the lock hook and the through groove.

[0018] Optionally, the pin shaft is detachably connected to the fixing seat via a cotter pin.

[0019] Optionally, the fixing seat is configured as a plate-like structure and arranged vertically, the pin shaft is arranged at the top of the fixing seat, and a second mounting groove is opened at the bottom end of the fixing seat, and the groove wall of the second mounting groove is attached to and fixedly connected to the top of the door body.

[0020] Optionally, the base is arranged on the front side of the top end of the door frame and the bottom end extends downward, the through groove, the limit member and the hinge shaft are all arranged at the bottom end of the base, the fixed seat is arranged on the front side of the top end of the door body and the top end extends upward, and the pin shaft is arranged at the top end of the fixed seat.

[0021] The utility model also provides an engineering machine, which comprises the above-mentioned protective door.

[0022] Through the above technical solution, the self-locking assembly provided by the utility model has the following beneficial effects:

[0023] The self-locking assembly of the utility model can be applied to the locking of protective doors. In actual application, the base of the self-locking assembly is fixedly arranged on the top end of the door frame, so that the through groove on the base and the lock hook of the locking member can face the front side of the door frame. When the door body is closed to the door frame, the outer frame of the door body or the pin shaft provided on the door body contacts the end face of the lock hook. Since the end face of the lock hook is formed as an inclined surface facing downward, the lock hook will be lifted up and disengaged from the limiting member under the action of the contact, so that the outer frame of the door body or the pin shaft on the door body can be stuck in the through groove. When the door body is closed to the door frame, the pin shaft After the pin shaft on the outer frame or the door body is completely inserted into the through groove, the lock hook will rest on the limit piece again under the action of its own gravity and form a locking space with the pin shaft on the outer frame or the door body to lock the door body. In this way, the automatic locking structure is formed by the self-locking component, so that the door body is automatically locked on the door frame after it is closed on the door frame. When it needs to be unlocked, it is only necessary to lift the lock hook. The locking and unlocking process does not require the use of other tools or the disassembly of any parts. It has good simplicity, is not easy to fail, and has high reliability.

[0024] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0026] Figure 1 A schematic diagram of the structure of the protective door provided by the utility model in a closed state;

[0027] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0028] Figure 3 A schematic diagram of the structure of the protective door in the open state provided by the utility model Figure 1 ;

[0029] Figure 4 A schematic diagram of the structure of the protective door in the open state provided by the utility model Figure 2 ;

[0030] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0031] Description of reference numerals:

[0032] 100 Base

[0033] 200 Limiting parts

[0034] 300 Locking parts

[0035] 301 Lock hook 302 Ring

[0036] 400 Articulated shaft

[0037] 500 Ring pad

[0038] 600 Door Frame

[0039] 700 Door

[0040] 800 Fixed seat

[0041] 900 Pin DETAILED DESCRIPTION

[0042] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0044] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings or are used to describe the relative positional relationships of components in the vertical, perpendicular or gravity direction.

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] The utility model firstly provides a self-locking component.

[0047] In one embodiment, referring to Figure 1 To Attachment Figure 5 As shown, the self-locking assembly includes:

[0048] The base 100 is provided with a through slot which runs through in the horizontal direction and faces forward;

[0049] The limiting member 200 is fixedly disposed on the base 100 and is located below the through slot;

[0050] The locking member 300 has a rear end hinged on the base 100 via a hinge shaft 400, the hinge shaft 400 is arranged behind the through slot and its axial direction is consistent with the through direction of the through slot, the front end of the locking member 300 is formed as a lock hook 301 and rests downward on the limit member 200, the lock hook 301 and the through slot together form a locking space and the end face is formed as an inclined surface facing downward.

[0051] The self-locking assembly of this embodiment can be applied to the locking of protective doors. In actual application, the base 100 of the self-locking assembly is fixedly arranged on the top of the door frame 600, so that the through groove on the base 100 and the lock hook 301 of the locking member 300 are both facing the front side of the door frame 600. When the door body 700 is closed to the door frame 600, the outer frame of the door body 700 or the pin shaft provided on the door body 700 abuts against the end face of the lock hook 301. Since the end face of the lock hook 301 is formed as an inclined surface facing downward, the lock hook 301 will be lifted up under the action of the abutment and disengaged from the limit member 200, so that the outer frame of the door body 700 or the pin shaft on the door body 700 can When the outer frame of the door body 700 or the pin shaft on the door body 700 is completely inserted into the through groove, the lock hook 301 will be placed on the limit piece 200 again under the action of its own gravity to form a locking space with the through groove for locking the outer frame of the door body 700 or the pin shaft on the door body 700. In this way, an automatic locking structure is formed by the self-locking component, so that the door body 700 is automatically locked on the door frame 600 after it is closed on the door frame 600. When unlocking is required, it is only necessary to lift the lock hook 301. The locking and unlocking process does not require the use of other tools or the disassembly of any parts. It has good simplicity, is not prone to failure, and has high reliability.

[0052] In actual application, in order to ensure that the lock hook 301 can be placed on the limit member 200 again under the action of its own gravity after being lifted, when the self-locking component is installed on the door frame 600, the locking member 300 can be arranged below the top of the door frame 600, and the upward rotation of the locking member 300 can be limited by the door frame 600 itself.

[0053] In one embodiment, referring to Figure 4 and attached Figure 5 As shown, the hinge shaft 400 is fixedly installed on the base 100, and the rear end of the locking member 300 is formed into a collar 302 and rotatably sleeved on the hinge shaft 400. In this way, the locking member 300 can rotate around the hinge shaft 400, so that the rear end of the locking member 300 is hinged on the base 100 through the hinge shaft 400.

[0054] Of course, in some other embodiments, the rear end of the locking member 300 can be fixedly connected to the hinge shaft 400, and the hinge shaft 400 can be rotatably connected to the base 100, so that the rear end of the locking member 300 is also hinged to the base 100 through the hinge shaft 400.

[0055] In one embodiment, referring to Figure 5 As shown, an annular pad 500 is nested between the collar 302 and the hinge shaft 400, the annular pad 500 and the hinge shaft 400 are interference fit, and the annular pad 500 and the collar 302 are clearance fit. In this way, the annular pad 500 plays a buffering role, preventing the collar 302 and the hinge shaft 400 from direct contact and mutual wear.

[0056] Specifically, the annular pad 500 may be a plastic or rubber member having a certain elasticity.

[0057] In one embodiment, referring to Figure 5 As shown, the articulated shaft 400 is configured as a bolt and is fixedly connected to the base 100 by a nut. Such an arrangement enables the articulated shaft 400 to be detachably connected to the base 100, which facilitates the disassembly and assembly of the articulated shaft 400.

[0058] In one embodiment, referring to Figure 1 To Attachment Figure 5 As shown, the base 100 is configured as a plate-like structure and is arranged vertically, the through slot, the limit member 200 and the hinge shaft 400 are all arranged at the bottom end of the base 100, and a first mounting groove is opened at the top end of the base 100.

[0059] In this embodiment, the base 100 can be fixedly arranged on the door frame 600 by the groove wall of the first installation groove being attached to and fixedly connected with the door frame 600. In this way, the base 100 can be firmly connected to the door frame 600 and has good structural strength. Specifically, the groove wall of the first installation groove is welded to the door frame 600.

[0060] The utility model also provides a protective door.

[0061] In one embodiment, referring to Figure 1 To Attachment Figure 5 As shown, the protective door includes:

[0062] Door frame 600;

[0063] The door body 700 is openably and closably arranged on the door frame 600;

[0064] The self-locking assembly described above, the base 100 is fixedly arranged on the top of the door frame 600;

[0065] The pin shaft assembly includes a fixing seat 800 fixed on the top of the door body 700 and a pin shaft 900 fixed on the fixing seat 800. The pin shaft 900 is arranged in alignment with the lock hook 301 resting on the limiting member 200. During the closing process of the door body 700, the pin shaft 900 contacts the end surface of the lock hook 301 resting on the limiting member 200 so as to lift the lock hook 301. After the door body 700 is closed, the pin shaft 900 is inserted into the locking space formed by the lock hook 301 and the through groove.

[0066] It can be understood that during the closing process of the door body 700, the pin shaft 900 contacts the end face of the lock hook 301. Since the end face of the lock hook 301 is formed as a downward inclined surface, the lock hook 301 will be lifted up under the action of the contact and disengaged from the limit member 200, so that the pin shaft 900 can be inserted into the through groove. When the pin shaft 900 is fully inserted into the through groove, the lock hook 301 will be re-mounted on the limit member 200 under the action of its own gravity to form a locking space for the outer frame of the door body 700 or the pin shaft on the door body 700 with the through groove. In this way, the locking is completed. When unlocking is required, it is only necessary to manually lift the lock hook 301 to allow the pin shaft 900 to disengage from the through groove between the limit member 200 and the lock hook 301.

[0067] In one embodiment, the pin 900 is detachably connected to the fixing seat 800 through a split pin. This arrangement allows the pin 900 to be detachably connected to the fixing seat 800, which facilitates the disassembly and assembly of the pin 900.

[0068] In one embodiment, the fixing seat 800 is configured as a plate-like structure and arranged vertically, the pin shaft 900 is arranged at the top of the fixing seat 800, and a second mounting groove is provided at the bottom of the fixing seat 800, and the groove wall of the second mounting groove is fixedly connected to the top of the door body 700. In this way, the fixing seat 800 can be firmly connected to the door body 700 and has good structural strength. Specifically, the groove wall of the second mounting groove is welded to the door body 700.

[0069] Specifically, the pin assembly may include two fixing seats 800 that are opposite and spaced apart, and both ends of the pin 900 are respectively connected to the two fixing seats 800, so that the structural strength can be further improved.

[0070] In one embodiment, the base 100 is arranged on the front side of the top end of the door frame 600 and the bottom end extends downward, the through groove, the limit member 200 and the hinge shaft 400 are all arranged at the bottom end of the base 100, the fixed seat 800 is arranged on the front side of the top end of the door body 700 and the top end extends upward, and the pin shaft 900 is arranged at the top end of the fixed seat 800.

[0071] Such an arrangement ensures that the self-locking assembly and the pin assembly do not occupy the space between the door frame 600 and the door body 700, thereby effectively ensuring the compactness of the protective door structure.

[0072] The utility model also provides an engineering machine, which comprises the above-mentioned protective door.

[0073] The above are only preferred implementation modes of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0074] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0075] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A self-locking component, characterized in that: The self-locking component comprises: The base (100) is provided with a through slot which runs through in a horizontal direction and faces forward; A limiting member (200) is fixedly disposed on the base (100) and is located below the through slot; A locking member (300), wherein the rear end of the locking member (300) is hinged to the base (100) via a hinge shaft (400), wherein the hinge shaft (400) is arranged behind the through slot and its axial direction is consistent with the through direction of the through slot, wherein the front end of the locking member (300) is formed as a locking hook (301) and rests on the limiting member (200) downwardly, wherein the locking hook (301) and the through slot together form a locking space and the end face is formed as an inclined surface facing downwardly.

2. The self-locking assembly according to claim 1, characterized in that: The hinge shaft (400) is fixedly mounted on the base (100), and the rear end of the locking member (300) is formed as a collar (302) and is rotatably mounted on the hinge shaft (400).

3. The self-locking assembly according to claim 2, characterized in that: An annular gasket (500) is nested between the collar (302) and the hinge shaft (400); the annular gasket (500) and the hinge shaft (400) are interference fit, and the annular gasket (500) and the collar (302) are clearance fit.

4. The self-locking assembly according to claim 2, characterized in that: The hinge shaft (400) is configured as a bolt and is fixedly connected to the base (100) via a nut.

5. The self-locking assembly according to claim 1, characterized in that: The base (100) is configured as a plate-like structure and is arranged vertically; the through groove, the limiting member (200) and the hinge shaft (400) are all arranged at the bottom end of the base (100); and a first mounting groove is provided at the top end of the base (100).

6. A protective door, characterized in that: The protective door comprises: Door frame (600); A door body (700) is arranged on the door frame (600) in an openable and closable manner; According to the self-locking assembly according to any one of claims 1 to 5, the base (100) is fixedly arranged on the top end of the door frame (600); The pin shaft assembly comprises a fixing seat (800) fixedly arranged on the top end of the door body (700) and a pin shaft (900) fixedly arranged on the fixing seat (800); the pin shaft (900) is arranged in correspondence with the lock hook (301) resting on the limiting member (200); during the closing process of the door body (700), the pin shaft (900) contacts the end surface of the lock hook (301) resting on the limiting member (200) so as to lift the lock hook (301); after the door body (700) is closed, the pin shaft (900) is inserted into the locking space formed by the lock hook (301) and the through groove.

7. The protective door according to claim 6, characterized in that: The pin shaft (900) is detachably connected to the fixing seat (800) via a split pin.

8. The protective door according to claim 6, characterized in that: The fixing seat (800) is configured as a plate-like structure and is arranged vertically, the pin shaft (900) is arranged at the top end of the fixing seat (800), and a second mounting groove is opened at the bottom end of the fixing seat (800), and the groove wall of the second mounting groove is fixedly connected to the top end of the door body (700).

9. The protective door according to claim 6, characterized in that: The base (100) is arranged on the front side of the top end of the door frame (600) and the bottom end extends downward, the through groove, the limit member (200) and the hinge shaft (400) are all arranged at the bottom end of the base (100), the fixed seat (800) is arranged on the front side of the top end of the door body (700) and the top end extends upward, and the pin shaft (900) is arranged at the top end of the fixed seat (800).

10. An engineering machine, characterized in that: The construction machine comprises a protective door according to any one of claims 6 to 9.

Images