Ratchet locking device, tool box and engineering machine

Abstract

The application provides a ratchet locking device, a tool box and engineering machinery, and relates to the technical field of engineering machinery. The ratchet locking device comprises a fixed plate, a ratchet wheel, a pawl and a shift fork. The ratchet wheel is rotatably installed on the fixed plate and can rotate in the interval between a first position and a second position. The pawl is rotatably installed on the fixed plate. The pawl and the ratchet wheel have a lapping state and a separation state. When the ratchet wheel rotates from the first position to the second position, the pawl and the ratchet wheel are in the lapping state. When the ratchet wheel rotates from the second position to the first position, the pawl and the ratchet wheel are in the separation state. The shift fork is rotatably installed on the fixed plate. The shift fork and the pawl have an unlocking state and an interlocking state. When the ratchet wheel rotates from the first position to the second position, the pawl and the shift fork are in the unlocking state. When the ratchet wheel rotates from the second position to the first position, the pawl and the shift fork are in the interlocking state. The ratchet locking device can ensure the accuracy of the engagement between the ratchet wheel and the pawl.

Description

Technical Field

[0001] This application relates to the field of engineering machinery and equipment technology, and in particular to a ratchet locking device, a toolbox, and engineering machinery. Background Technology

[0002] Currently, excavator toolboxes typically use guide rails and brackets to limit the opening and closing of the toolbox cover. The guide rail structure is fixed to one side of the toolbox body, one end of the bracket connects to the cover to form a rotating joint, and the other end is positioned with the guide rail track to form a sliding joint. Another method uses a ratchet and pawl structure to achieve multi-angle opening and limiting. However, in existing technology, the ratchet hinge structure uses a split design (the pawl and ratchet are located on the upper and lower brackets respectively), which often results in inaccurate engagement during actual use. Utility Model Content

[0003] Based on this, this application provides a ratchet locking device, a toolbox, and engineering machinery, which can ensure the installation error between the ratchet and the pawl and ensure the accuracy of the meshing.

[0004] This application provides a ratchet locking device, including:

[0005] Fixing plate;

[0006] A ratchet is rotatably mounted on a fixed plate. The ratchet has a first position and a second position, and the ratchet can rotate within the range between the first position and the second position.

[0007] The pawl is rotatably mounted on the fixed plate. The pawl and the ratchet have an overlapping state and a disengaged state. When the ratchet rotates from the first position to the second position, the pawl and the ratchet are in the overlapping state. When the ratchet rotates from the second position to the first position, the pawl and the ratchet are in the disengaged state.

[0008] The shift fork is rotatably mounted on the fixed plate. The shift fork and the pawl have an unlocked state and an interlocked state. When the ratchet rotates from the first position to the second position, the pawl and the shift fork are in the unlocked state. When the ratchet rotates from the second position to the first position, the pawl and the shift fork are in the interlocked state.

[0009] The ratchet locking device according to the embodiments of this application has at least the following beneficial effects: When the ratchet rotates from the first position to the second position, the lid gradually opens. The pawl and ratchet are in an overlapping state, allowing the ratchet to rotate freely from the first position to the second position. During this process, when the ratchet is subjected to an external force and attempts to rotate in the opposite direction, such as when the lid falls due to gravity, the pawl and the tooth groove of the ratchet 14 engage to form a rigid support, preventing the ratchet from reversing. This design can adapt to the complex working environment of engineering machinery, which can easily lead to the lid automatically closing. By setting a shift fork, when the ratchet rotates from the first position to the second position, the pawl and the shift fork are in an unlocked state, and the shift fork does not affect the rotation of the pawl, ensuring its general limiting effect on the ratchet. When the ratchet rotates from the second position to the first position, the pawl and the shift fork are in an interlocked state, keeping the pawl and ratchet in a separated state, ensuring the normal rotation of the ratchet.

[0010] According to some embodiments of this application, the fixed plate is provided with a first reset device, which is connected to the pawl and drives the pawl to have a tendency to overlap with the outer edge of the ratchet.

[0011] In this embodiment, by setting a first reset device, the pawl is driven to have a tendency to overlap with the outer edge of the ratchet. When the ratchet rotates from the first position to the second position, the pawl is always overlapped with the outer edge of the ratchet, allowing the ratchet 14 to rotate freely from the first position to the second position, and preventing the ratchet from reversing.

[0012] According to some embodiments of this application, the first reset device includes a first tension spring and a first cotter pin. The first cotter pin is connected to a pawl. One end of the first tension spring is fixedly connected to a fixed plate, and the other end is connected to the first cotter pin. The fixed plate is provided with a first arc-shaped slot, and the first cotter pin passes through the first arc-shaped slot.

[0013] In this embodiment, the first cotter pin is connected to the first tension spring. Under the restoring force of the first tension spring, the pawl tends to move towards the outer edge of the ratchet. The fixing plate has a first arc-shaped slot, and the first cotter pin passes through this slot. This ensures that the pawl can only rotate within the limited range of the first arc-shaped slot.

[0014] According to some embodiments of this application, the front end of the shift fork overlaps the rim of the ratchet and the pawl overlaps on the other side of the ratchet. The fixed plate is provided with a second reset device, which is connected to the shift fork and drives the shift fork to have a tendency to overlap with the ratchet. The tail end of the pawl abuts against the shift fork and the tail end of the pawl is provided with an arc-shaped notch. The shift fork is provided with a locking end that meshes with the arc-shaped notch.

[0015] In this embodiment, a second reset device is provided to drive the pawl to tend to engage with the outer edge of the ratchet. Simultaneously, because the tail end of the pawl abuts against the pawl, the contact position between the pawl and the pawl changes continuously as the ratchet rotates. When the ratchet rotates to the second position, the arc-shaped notch of the pawl and the locking end of the pawl interlock. The pawl can no longer restrict the ratchet, and the ratchet can rotate from the second position to the first position, thus enabling the lid to close. As the ratchet rotates from the second position to the first position, after rotating a certain distance, it abuts against the pawl. Continued rotation of the ratchet pushes the pawl to rotate around the position where it is rotatably connected to the fixed plate. As the pawl rotates, the contact position between the pawl and the pawl changes continuously. When it reaches the first position, the arc-shaped notch of the pawl disengages from the locking end of the pawl, and the interlocking state is released. Under the action of the first reset device, the pawl re-engages with the outer edge of the ratchet. The lid closes, completing one cycle.

[0016] According to some embodiments of this application, the second reset device includes a second tension spring and a second cotter pin. The second cotter pin is connected to a fork. One end of the second tension spring is fixedly connected to a fixed plate, and the other end is connected to the second cotter pin. The fixed plate is provided with a second arc-shaped slot, and the second cotter pin passes through the second arc-shaped slot.

[0017] In this embodiment, the second cotter pin and the second tension spring are connected. Under the rebound force of the second tension spring, the fork is pulled towards the outer edge of the ratchet. The fixing plate has a second arc-shaped slot, and the second cotter pin passes through this slot. This ensures that the fork can only rotate within the limited range of the second arc-shaped slot.

[0018] According to some embodiments of this application, the rim of the ratchet is provided with a plurality of slots in sequence, and the pawl can be engaged in the slots in sequence during the process of the ratchet rotating from the first position to the second position.

[0019] In this embodiment, by setting multiple slots, as the ratchet rotates from the first position to the second position, the pawl can be sequentially engaged in the slots to achieve step-by-step opening, with the opening angle of the corresponding box cover increasing step by step.

[0020] According to some embodiments of this application, the ratchet is rotatably mounted on the fixed plate via a rotating shaft, and a torque device is mounted on the rotating shaft.

[0021] In this embodiment, when the ratchet rotates to the second position, the torque device applies additional resistance torque to the ratchet. This prevents the lid from being opened to its maximum angle and then quickly returning to its original position due to operational errors. By incorporating the torque device, the lid is prevented from rapidly rebounding due to gravity at its maximum angle, which could lead to unstable engagement between the pawl and ratchet, or even damage to the locking structure. The buffering effect of the torque device ensures a smooth and controllable lid reset process, extending component life. It also prevents the lid from suddenly closing due to gravity or inertia, improving operational safety.

[0022] According to some embodiments of this application, a cover plate is also included, and the cover plate and the fixing plate are arranged opposite each other to form an installation space, in which the ratchet, pawl and fork are located.

[0023] In this embodiment, by providing a cover plate, the axial movement of the ratchet, pawl, and fork can be reduced. Simultaneously, the resulting mounting space protects the internal structural components.

[0024] This application also discloses a toolbox, including the above-mentioned ratchet locking device, as well as a box body and a box cover;

[0025] The lid is mounted on the box body, the fixing plate is installed inside the box body, and the ratchet is connected to the lid. The first and second positions of the ratchet correspond to the closed and open states of the lid.

[0026] This application also discloses an engineering machine, including the toolbox described above.

[0027] Since the toolbox and engineering machinery of this application adopt all the technical solutions of the ratchet locking device of the above embodiments, they have at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0028] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the ratchet locking device, toolbox, and engineering machinery provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific embodiments. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1This is a perspective view of the ratchet locking device provided in the embodiments of this application;

[0031] Figure 2 An exploded view of the ratchet locking device provided in the embodiments of this application;

[0032] Figure 3 A schematic diagram of the state of the ratchet locking device provided in the embodiment of this application when it is in the first position;

[0033] Figure 4 This is a schematic diagram showing the state of the box lid when it is in the first-level open position, as provided in an embodiment of this application.

[0034] Figure 5 This is a schematic diagram showing the state of the box lid in a two-stage opening, as provided in an embodiment of this application.

[0035] Figure 6 This is a schematic diagram illustrating the state of the box lid when it is in a three-level opening position, as provided in an embodiment of this application.

[0036] Figure 7 A schematic diagram showing the fork and pawl in the unlocked state is provided for embodiments of this application;

[0037] Figure 8 A schematic diagram showing the fork and pawl in an interlocked state is provided for embodiments of this application;

[0038] Figure 9 This is a schematic diagram of the lid closing process provided in an embodiment of this application;

[0039] Figure 10 A schematic diagram showing the ratchet and pawl in a separated state is provided for embodiments of this application;

[0040] Figure 11 This is a perspective view of the toolbox provided in the embodiments of this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1-Box body; 2-Door lock; 3-Padded plate; 4-Box lid; 5-Reinforcing plate; 6-Ratchet locking device; 7-Buffer block; 8-Lock; 9-Fixing plate; 91-First arc-shaped slot; 92-Second arc-shaped slot;

[0043] 10-Padded block; 11-Cover plate; 12-Fixing pin; 13-Spindle; 14-Ratchet;

[0044] 15-Ratchet; 151-Arc-shaped notch;

[0045] 16-Shift fork; 161-Locking end;

[0046] 101 - First reset device; 17a - First cotter pin; 19a - First tension spring;

[0047] 102 - Second reset device; 17b - Second cotter pin; 19b - Second tension spring;

[0048] 18 - Bolt; 20 - Torque device; 21 - Rotating shaft. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0052] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0053] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0054] refer to Figure 1 and Figure 2 As shown, this application discloses a ratchet locking device, comprising:

[0055] Fixing plate 9;

[0056] Ratchet 14 is rotatably mounted on fixed plate 9. Ratchet 14 has a first position and a second position, and can rotate within the range of the first position and the second position.

[0057] Pad 15 is rotatably mounted on fixed plate 9. Pad 15 and ratchet 14 have an overlapping state and a separated state. When ratchet 14 rotates from the first position to the second position, pad 15 and ratchet 14 are in the overlapping state. When ratchet 14 rotates from the second position to the first position, pad 15 and ratchet 14 are in the separated state.

[0058] The shift fork 16 is rotatably mounted on the fixed plate 9. The shift fork 16 and the pawl 15 have an unlocked state and an interlocked state. When the ratchet 14 rotates from the first position to the second position, the pawl 15 and the shift fork 16 are in the unlocked state. When the ratchet 14 rotates from the second position to the first position, the pawl 15 and the shift fork 16 are in the interlocked state.

[0059] Combination Figure 11 As shown, in this embodiment, the ratchet locking device 6 is used to install in the toolbox. The toolbox consists of a box body 1, a door lock 2, a pad plate 3, a box lid 4, a reinforcing plate 5, the ratchet locking device 6, a buffer block 7, and a latch 8. The ratchet 14 is connected to the box lid 4 and rotates together with the box lid 4 as it opens and closes. The pad plate 3 is used for mounting the toolbox on construction machinery. The reinforcing plate 5 is used to enhance the structural strength of the box body. The buffer block 7 provides a cushioning effect when the box lid 4 is closed.

[0060] refer to Figure 3 and Figure 8 As shown, the first and second positions of the ratchet 14 correspond to the closed and open states of the lid 4. Specifically, when the lid 4 is closed, the ratchet 14 is in the first position. When the lid 4 is open, the ratchet 14 rotates to the second position.

[0061] A ratchet mechanism is a mechanical device that enables unidirectional intermittent motion. By engaging and disengaging the pawl and ratchet, the mechanism is allowed to rotate freely in one direction and locked in the opposite direction.

[0062] refer to Figures 3 to 8 As shown, in this embodiment, when the ratchet 14 rotates from the first position to the second position, the cover 4 gradually opens. The pawl 15 is engaged with the ratchet 14, allowing the ratchet 14 to rotate freely from the first position to the second position. During this process, if the ratchet 14 is subjected to an external force and attempts to rotate in the opposite direction, such as when the cover 4 falls due to gravity, the teeth of the pawl 15 and the ratchet 14 engage, forming a rigid support and preventing the ratchet 14 from reversing. This design can adapt to the complex working environment of construction machinery, especially excavators. For example, in slope operation environments, the cover 4 is prone to automatically closing due to gravity, which could trap the operator. Simultaneously, during excavator operation, the machine vibrates strongly, which can easily cause the cover 4 to automatically close.

[0063] refer to Figure 9 and Figure 10 As shown, in order for the lid 4 to close smoothly after being opened, that is, for the ratchet 14 to rotate from the second position to the first position, the pawl 15 needs to disengage from the ratchet 14 during this process to prevent the pawl 15 from restricting the ratchet 14.

[0064] Therefore, by setting a fork 16, when the ratchet 14 rotates from the first position to the second position, the pawl 15 and the fork 16 are in an unlocked state, and the fork 16 does not affect the rotation of the pawl 15, ensuring that the pawl 15 can perform its normal limiting function on the ratchet 14. When the ratchet 14 rotates from the second position to the first position, the pawl 15 and the fork 16 are in an interlocked state, keeping the pawl 15 and the ratchet 14 in a separated state, ensuring that the ratchet 14 can rotate in the opposite direction.

[0065] Meanwhile, both the ratchet 14 and the pawl 15 are mounted on the surface of the fixed plate 9, making the ratchet 14 and the pawl 15 coplanar. This ensures that the installation error between the ratchet 14 and the pawl 15 is correct and that the meshing accuracy is guaranteed.

[0066] In some embodiments of this application, the fixing plate 9 is provided with a first reset device 101, which is connected to the pawl 15 and drives the pawl 15 to have a tendency to overlap with the outer edge of the ratchet 14.

[0067] refer to Figure 2As shown, in this embodiment, by providing a first reset device 101, the pawl 15 is driven to have a tendency to engage with the outer edge of the ratchet 14. When the ratchet 14 rotates from the first position to the second position, the pawl 15 is always engaged with the outer edge of the ratchet 14, allowing the ratchet 14 to rotate freely from the first position to the second position. This also prevents the ratchet 14 from reversing.

[0068] refer to Figure 2 As shown, in some embodiments of this application, the first reset device 101 includes a first tension spring 19a and a first cotter pin 17a. The first cotter pin 17a is connected to a pawl 15. One end of the first tension spring 19a is fixedly connected to a fixing plate 9, and the other end is connected to the first cotter pin 17a. The fixing plate 9 is provided with a first arc-shaped slot 91, and the first cotter pin 17a passes through the first arc-shaped slot 91.

[0069] In this embodiment, the first cotter pin 17a is connected to the first tension spring 19a. Under the rebound force of the first tension spring 19a, the pawl 15 is pulled to have a tendency to overlap with the outer edge of the ratchet 14. The fixing plate 9 is provided with a first arc-shaped slot 91, and the first cotter pin 17a passes through the first arc-shaped slot 91. This ensures that the pawl 15 can only rotate within the limited range of the first arc-shaped slot 91.

[0070] Furthermore, in this embodiment, the first tension spring 19a is disposed on the back of the fixing plate 9 to avoid interference with the ratchet 14, pawl 15, and shift fork 16. The first tension spring 19a is fixedly connected to the fixing plate 9 by bolts 18.

[0071] refer to Figure 2 As shown, in some embodiments of this application, the front end of the shift fork 16 is attached to the rim of the ratchet 14, and the pawl 15 is attached to the other side of the ratchet 14. The fixing plate 9 is provided with a second reset device 102, which is connected to the shift fork 16 and drives the shift fork 16 to have a tendency to attach to the ratchet 14. The tail end of the pawl 15 abuts against the shift fork 16. The tail end of the pawl 15 is provided with an arc-shaped notch 151. The shift fork 16 is provided with a locking end 161 that meshes with the arc-shaped notch 151.

[0072] The locking end 161 can be an L-shaped step extending from the front to the rear of the fork 16, or it can be a protruding stop. When the locking end 161 engages with the arc-shaped notch 151, it prevents the pawl 15 from rotating, thus locking the pawl. When the locking end 161 disengages from the arc-shaped notch 151, the pawl 15 can rotate again, unlocking the pawl. By setting the radius of curvature of the arc-shaped notch 151, the pawl 15 can be controlled to rotate to a set angle to perform locking and unlocking actions. The radius of curvature of the arc-shaped notch 151 can be set according to actual needs and is not limited here.

[0073] refer to Figures 3 to 8 As shown, in this embodiment, by providing a second reset device 102, the drive fork 16 is driven to have a tendency to engage with the outer edge of the ratchet 14. Simultaneously, since the tail end of the pawl 15 abuts against the fork 16, the contact position between the pawl 15 and the fork 16 changes continuously as the ratchet 14 rotates. When the ratchet 14 rotates to the second position, the arc-shaped notch 151 of the pawl 15 and the locking end 161 of the fork 16 lock together. The pawl 15 can no longer restrict the ratchet 14, and the ratchet 14 can rotate from the second position to the first position, thus enabling the closing of the lid 4.

[0074] refer to Figure 9 and Figure 10 As shown, during the rotation of ratchet 14 from the second position to the first position, after rotating to a certain position, ratchet 14 will abut against shift fork 16. Continued rotation of ratchet 14 will push shift fork 16 to rotate around the position where it is rotatably connected to fixed plate 9. As shift fork 16 rotates, the abutment position of pawl 15 and shift fork 16 will continuously change. When it rotates to the first position, the arc-shaped notch 151 of pawl 15 and the locking end 161 of shift fork 16 disengage, and the interlocking state is released. Under the action of the first reset device 101, pawl 15 re-engages on the outer edge of ratchet 14. The cover 4 closes, completing one cycle.

[0075] refer to Figure 2 As shown, in some embodiments of this application, the second reset device 102 includes a second tension spring 19b and a second cotter pin 17b. The second cotter pin 17b is connected to the fork 16. One end of the second tension spring 19b is fixedly connected to the fixing plate 9, and the other end is connected to the second cotter pin 17b. The fixing plate 9 is provided with a second arc-shaped slot 92, and the second cotter pin 17b passes through the second arc-shaped slot 92.

[0076] In this embodiment, the second cotter pin 17b is connected to the second tension spring 19b. Under the rebound force of the second tension spring 19b, the fork 16 is pulled towards the outer edge of the ratchet 14. The fixing plate 9 is provided with a second arc-shaped slot 92, and the second cotter pin 17b passes through the second arc-shaped slot 92. This ensures that the fork 16 can only rotate within the limited range of the second arc-shaped slot 92.

[0077] Furthermore, in this embodiment, the second tension spring 19b is disposed on the back of the fixing plate 9 to avoid interference with the ratchet 14, pawl 15, and shift fork 16. The second tension spring 19b is fixedly connected to the fixing plate 9 by bolts 18.

[0078] In other embodiments, the first tension spring 19a and the second tension spring 19b can be directly connected together. Alternatively, they can each be connected to a fixing bolt, without sharing bolt 18. Furthermore, the pawl 15 and the fork 16 can also be mounted on the fixing plate 9 via torsion springs, utilizing the rebound force of the torsion springs to replace the rebound action of the first tension spring 19a and the second tension spring 19b. Additionally, the pawl 15 and the fork 16 are rotatably connected to the fixing plate 9 via corresponding pivots 13.

[0079] In some embodiments of this application, the rim of the ratchet 14 is provided with a plurality of slots 141 in sequence. During the process of the ratchet 14 rotating from the first position to the second position, the pawl 15 can be engaged in the slots 141 in sequence.

[0080] In practical use, the toolbox contains numerous tools, which can be categorized by size into small tools, medium-sized equipment, and large tools. By setting the slots 141, as the ratchet 14 rotates from the first position to the second position, the pawl 15 can sequentially engage in the slots 141, achieving step-by-step opening, with the opening angle of the lid 4 increasing progressively. This caters to different usage scenarios. Especially in confined work areas, a single-step opening is sufficient for accessing most commonly used tools, preventing the lid 4 from opening too wide and colliding with surrounding obstacles. In this embodiment, three slots 141 are sequentially set on the rim of the ratchet 14, corresponding to three opening angles. Furthermore, the depth of the three slots 141 increases progressively to accommodate the increasing opening resistance torque of the lid 4 as the angle increases.

[0081] In some embodiments of this application, the ratchet 14 is rotatably mounted on the fixed plate 9 via a rotating shaft 21, and a torque device 20 is mounted on the rotating shaft 21.

[0082] In this embodiment, when the ratchet 14 rotates to the second position, the torque device 20 applies additional resistance torque to the ratchet 14. This prevents the cover 4 from being opened to its maximum angle and then quickly returning to its original position due to operational errors. By setting the torque device 20, the cover 4 is prevented from rapidly rebounding due to gravity at its maximum angle, which could lead to unstable engagement between the pawl 15 and the ratchet 14, or even damage to the ratchet locking device 6. The buffering effect of the torque device 20 ensures that the return process of the cover 4 is smooth and controllable, extending the life of the components. It also prevents the cover 4 from suddenly closing due to gravity or inertia, improving operational safety, especially under excavator vibration or tilting conditions. The torque device 20 can be a friction damper or a rotary damper, providing controllable torque through frictional resistance.

[0083] refer to Figure 1 and Figure 2As shown, in some embodiments of this application, a cover plate 11 is also included. The cover plate 11 and the fixing plate 9 are arranged opposite each other to form an installation space, and the ratchet 14, pawl 15 and fork 16 are located in the installation space.

[0084] In this embodiment, the cover plate 11 and the fixing plate 9 are arranged in parallel, with the ratchet 14, pawl 15, and fork 16 positioned in the mounting space between the cover plate 11 and the fixing plate 9. By using the cover plate 11, the axial movement of the ratchet 14, pawl 15, and fork 16 can be reduced. Simultaneously, the formed mounting space protects the internal structural components. Furthermore, the cover plate 11 and the fixing plate 9 are fitted with spacers 10 for limiting their movement. The cover plate 11 and the fixing plate 9 are connected together by a fixing pin 12.

[0085] refer to Figure 11 As shown, this application also discloses a toolbox, including the ratchet locking device 6 described above, as well as a box body 1 and a box cover 4;

[0086] The lid 4 is mounted on the box body 1, the fixing plate 9 is installed inside the box body 1, the ratchet 14 is connected to the lid 4, and the first position and the second position of the ratchet 14 correspond to the closed state and the open state of the lid 4.

[0087] In this embodiment, the ratchet locking device 6 is installed in the toolbox. The toolbox consists of a box body 1, a door lock 2, a pad 3, a box lid 4, a reinforcing plate 5, the ratchet locking device 6, a buffer block 7, and a latch 8. The ratchet 14 is connected to the box lid 4 and rotates together with the box lid 4 to realize the opening and closing process of the box lid 4.

[0088] Both the ratchet 14 and the pawl 15 are mounted on the surface of the fixed plate 9, making the ratchet 14 and the pawl 15 coplanar. This ensures that the installation error between the ratchet 14 and the pawl 15 is correct and that the meshing accuracy is guaranteed.

[0089] This application also discloses an engineering machine, including the aforementioned toolbox.

[0090] Since the engineering machinery of this application adopts all the technical solutions of the ratchet locking device of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A ratchet locking device, characterized in that, include: Fixing plate (9); A ratchet (14) is rotatably mounted on the fixed plate (9). The ratchet (14) has a first position and a second position, and the ratchet (14) is capable of rotating within the range between the first position and the second position. A pawl (15) is rotatably mounted on the fixed plate (9). The pawl (15) and the ratchet (14) have an overlapping state and a separated state. When the ratchet (14) rotates from the first position to the second position, the pawl (15) and the ratchet (14) are in an overlapping state. When the ratchet (14) rotates from the second position to the first position, the pawl (15) and the ratchet (14) are in a separated state. A fork (16) is rotatably mounted on the fixed plate (9). The fork (16) and the pawl (15) have an unlocked state and an interlocked state. When the ratchet (14) rotates from the first position to the second position, the pawl (15) and the fork (16) are in the unlocked state. When the ratchet (14) rotates from the second position to the first position, the pawl (15) and the fork (16) are in the interlocked state.

2. The ratchet locking device according to claim 1, characterized in that: The fixed plate (9) is provided with a first reset device (101), which is connected to the pawl (15) and drives the pawl (15) to have a tendency to overlap with the outer edge of the ratchet (14).

3. The ratchet locking device according to claim 2, characterized in that: The first reset device (101) includes a first tension spring (19a) and a first cotter pin (17a). The first cotter pin (17a) is connected to the pawl (15). One end of the first tension spring (19a) is fixedly connected to the fixing plate (9), and the other end is connected to the first cotter pin (17a). The fixing plate (9) is provided with a first arc-shaped slot (91), and the first cotter pin (17a) passes through the first arc-shaped slot (91).

4. The ratchet locking device according to claim 1, characterized in that: The front end of the shift fork (16) rests on the rim of the ratchet (14) and rests on the other side of the ratchet (14) opposite to the pawl (15). The fixing plate (9) is provided with a second reset device (102), which is connected to the shift fork (16) and drives the shift fork (16) to have a tendency to rest on the ratchet (14). The tail end of the pawl (15) abuts against the shift fork (16). The tail end of the pawl (15) is provided with an arc-shaped notch (151). The shift fork (16) is provided with a locking end (161) that meshes with the arc-shaped notch (151).

5. The ratchet locking device according to claim 4, characterized in that: The second reset device (102) includes a second tension spring (19b) and a second cotter pin (17b). The second cotter pin (17b) is connected to the fork (16). One end of the second tension spring (19b) is fixedly connected to the fixing plate (9), and the other end is connected to the second cotter pin (17b). The fixing plate (9) is provided with a second arc-shaped slot (92), and the second cotter pin (17b) passes through the second arc-shaped slot (92).

6. The ratchet locking device according to claim 1, characterized in that: The ratchet (14) has a plurality of slots (141) arranged sequentially on its rim. During the process of the ratchet (14) rotating from the first position to the second position, the pawl (15) can be sequentially engaged in the slots (141).

7. The ratchet locking device according to claim 1, characterized in that: The ratchet (14) is rotatably mounted on the fixed plate (9) via a rotating shaft (21), and a torque device (20) is mounted on the rotating shaft (21).

8. The ratchet locking device according to claim 1, characterized in that: It also includes a cover plate (11), which is arranged opposite to the fixing plate (9) to form an installation space, and the ratchet (14), pawl (15) and fork (16) are located in the installation space.

9. A toolbox, characterized in that, Includes the ratchet locking device as described in any one of claims 1-8, as well as the housing (1) and the lid (4); The lid (4) is disposed on the box body (1), the fixing plate (9) is installed inside the box body (1), the ratchet (14) is connected to the lid (4), and the first position and the second position of the ratchet (14) correspond to the closed state and the open state of the lid (4).

10. An engineering machinery, characterized in that, Includes the toolbox as described in claim 9.

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