boom locking device and operating machinery

Abstract

This invention relates to the field of engineering machinery technology, providing a boom locking device and a working machine. The boom locking device includes a first limiting hook, a second limiting hook, a first flexible shaft, and a locking mechanism. The first limiting hook is fixed to the boom, and the second limiting hook is rotatably mounted on a deflection platform. The second limiting hook can engage or disengage with the first limiting hook. The first flexible shaft is connected to the second limiting hook and controls its rotation. The locking mechanism is mounted on the deflection platform and can switch between a locked state and an unlocked state. In the locked state, the locking mechanism presses against the second limiting hook to keep it engaged with the first limiting hook. In the unlocked state, the locking mechanism disengages from the second limiting hook to allow its rotation. This design solves the problem of existing boom locking devices easily failing due to bumps and vibrations.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a boom locking device and a working machine. Background Technology

[0002] A backhoe loader, commonly known as a double-ended loader, is a multi-functional construction machine that includes both a loading end device and an excavating end device. When the loading end device needs to operate, a locking device is required to lock the excavating end device. The locking device for the excavating end device mainly consists of limit hooks installed on the slewing platform and the excavating boom. The limit hooks on the slewing platform are directly connected to a flexible shaft, which extends to the cab. When the operator pulls the flexible shaft from the cab, it rotates the limit hooks on the slewing platform, thereby locking or unlocking the limit hooks on the excavating boom.

[0003] In the existing technology, the locking force of the limit hook on the deflection platform is relatively small. When the excavator loader is bumpy, the limit hook on the deflection platform is prone to disengage from the limit hook on the excavator boom due to accidental rotation, thus losing its limiting function on the excavator boom.

[0004] Therefore, how to solve the problem that the boom locking device in the prior art is prone to failure due to bumps and vibrations has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a boom locking device and a working machine to solve the defect that the boom locking device in the prior art is prone to failure due to bumps and vibrations.

[0006] This invention provides a boom locking device, comprising:

[0007] A first limiting hook and a second limiting hook, wherein the first limiting hook is fixedly mounted on the boom, and the second limiting hook is rotatably mounted on the deflection platform, and the second limiting hook can engage or disengage with the first limiting hook.

[0008] A first flexible shaft is connected to the second limiting hook, and the first flexible shaft is adapted to control the rotation of the second limiting hook;

[0009] A locking mechanism is disposed on the deflection platform. The locking mechanism can switch between a locked state and an unlocked state. In the locked state, the locking mechanism presses the second limiting hook so that the second limiting hook is held in a position engaged with the first limiting hook. In the unlocked state, the locking mechanism disengages from the second limiting hook to allow the second limiting hook to rotate.

[0010] According to the present invention, a boom locking device is provided, wherein the locking mechanism comprises:

[0011] The abutment has a first end that is rotatably connected to the deflection platform, and a second end that is adapted to abut against the upper surface of the second limiting hook;

[0012] A locking member has a first end that is rotatably connected to the blocking member. The rotatable connection point between the locking member and the blocking member is located between the first end and the second end of the blocking member. The second end of the locking member is slidably connected to the deflection platform to drive the blocking member to rotate.

[0013] A driving element adapted to drive the second end of the locking element to slide back and forth relative to the deflection platform.

[0014] According to the present invention, a boom locking device is provided, wherein the driving component includes:

[0015] The second flexible shaft has its first end connected to the second end of the locking member, and the second end of the second flexible shaft extends into the driver's cab.

[0016] According to a boom locking device provided by the present invention, when the abutment is against the second limiting hook, the position of the abutment is a first position, and when the locking member causes the abutment to be in the first position, the position of the locking member is a third position.

[0017] The locking mechanism further includes:

[0018] A first elastic element is disposed between the stop member and the deflection platform, and the first elastic element is adapted to give the stop member a tendency to rotate toward the first position;

[0019] A second elastic element is disposed between the locking element and the blocking element, and the second elastic element is adapted to give the locking element a tendency to move toward the third position.

[0020] According to a boom locking device provided by the present invention, a guide structure is provided between the second end of the locking member and the deflection platform, and the guide structure is adapted to slide guide the second end of the locking member.

[0021] According to the present invention, a boom locking device is provided, wherein the guide structure includes:

[0022] Guide grooves are provided on the deflection platform;

[0023] A guide post is disposed at the second end of the locking member. The guide post is embedded in the guide groove and can slide back and forth along the guide groove.

[0024] According to a boom locking device provided by the present invention, the guide post is cylindrical and is rotatably connected to the locking member. The rotation axis coincides with the central axis of the guide post and is perpendicular to the guide groove and the locking member.

[0025] A boom locking device according to the present invention further includes:

[0026] A limiting component is disposed on the deflection platform, and the limiting component is adapted to allow the second limiting hook to rotate within a target angle range.

[0027] According to a boom locking device provided by the present invention, the second end of the locking member is provided with a pull ring, and the first end of the second flexible shaft is connected to the pull ring.

[0028] The present invention also provides a working machine, including the above-mentioned boom locking device.

[0029] The boom locking device provided by this invention includes a first limiting hook, a second limiting hook, a first flexible shaft, and a locking mechanism. The first limiting hook is fixedly mounted on the boom, and the second limiting hook is rotatably mounted on a deflection platform. The rotation of the second limiting hook allows it to engage or disengage with the first limiting hook. The first flexible shaft is connected to the second limiting hook and controls its rotation, enabling engagement or disengagement. The locking mechanism is mounted on the deflection platform and can switch between a locked and unlocked state. When the locking mechanism is switched to the unlocked state, it disengages from the second limiting hook, allowing the second limiting hook to rotate and engage or disengage with the first limiting hook. When the locking mechanism switches to the locking state, the locking mechanism presses the second limit hook so that the second limit hook is engaged with the first limit hook, restricting the second limit hook from rotating to the position where it is disengaged from the first limit hook. This avoids the problem of the second limit hook disengaging from the first limit hook due to bumps and vibrations, and prevents the boom locking device from failing due to bumps and vibrations.

[0030] In addition, the locking mechanism is designed with a structure that drives the locking and blocking parts to move via a second flexible shaft, which has the advantages of convenient operation, simple structure and low cost.

[0031] The first and second elastic elements enable the blocking and locking elements to automatically return to the first and third positions respectively when the second flexible shaft is released, and increase the clamping force on the second limit hook to ensure the stability and reliability of the locking mechanism.

[0032] The guide structure allows for a defined sliding trajectory at the second end of the locking element, improving the stability of the locking mechanism. Furthermore, designing the guide post as a rotatable structure reduces wear on the guide post and guide groove.

[0033] Furthermore, the working machinery provided by the present invention also possesses the various advantages described above due to the boom locking device described above. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this invention 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 invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the boom locking device provided by the present invention;

[0036] Figure 2 This is a schematic diagram of the boom locking device provided by the present invention when the second limiting hook is in the fifth position, the abutment is in the first position, and the locking member is in the third position;

[0037] Figure 3 This is a schematic diagram of the boom locking device provided by the present invention when the second limiting hook is in the fifth position, the abutment is in the second position, and the locking member is in the fourth position;

[0038] Figure 4 This is a schematic diagram of the boom locking device provided by the present invention when the second limiting hook is in the sixth position, the abutment is in the second position, and the locking member is in the fourth position;

[0039] Figure 5 This is a schematic diagram of the structure of the first elastic element and the second elastic element provided by the present invention.

[0040] Figure label:

[0041] 1. First limiting hook; 2. Second limiting hook; 3. Boom; 4. Deflection platform; 5. First flexible shaft; 6. Stopping component; 7. Locking component; 8. Second flexible shaft; 9. First elastic component; 10. Second elastic component; 11. Guide groove; 12. Pull ring; 13. Transition connector; 14. First limiting block; 15. Second limiting block. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention 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. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 mechanical connection or an electrical 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 the embodiments of the present invention based on the specific circumstances.

[0045] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] The following is combined with Figures 1 to 5 The boom locking device of the present invention is described.

[0048] like Figures 1 to 5 As shown, the boom locking device provided in this embodiment of the invention includes a first limiting hook 1, a second limiting hook 2, a first flexible shaft 5, and a locking mechanism.

[0049] Specifically, the first limiting hook 1 is fixedly mounted on the boom 3, and the second limiting hook 2 is rotatably mounted on the deflection platform 4. The rotation of the second limiting hook 2 can engage or disengage with the first limiting hook 1.

[0050] For ease of explanation, it is hereby specified that the second limiting hook 2 can rotate between the fifth position and the sixth position. When the second limiting hook 2 rotates to the fifth position, the second limiting hook 2 can engage with the first limiting hook 1, as shown in the reference. Figure 2 and Figure 3 When the second limiting hook 2 rotates to the sixth position, the second limiting hook 2 disengages from the first limiting hook 1, as shown in the reference. Figure 4 .

[0051] The first end of the first flexible shaft 5 is connected to the second limiting hook 2, and the first flexible shaft 5 is used to control the rotation of the second limiting hook 2. The second end of the first flexible shaft 5 extends to the cab, and the driver can control the rotation of the second limiting hook 2 between the fifth and sixth positions through the first flexible shaft 5 in the cab, which is convenient for operation.

[0052] When the second limiting hook 2 is engaged with the first limiting hook 1, the second limiting hook 2 is located above the first limiting hook 1.

[0053] The locking mechanism is located on the deflection platform 4. The locking mechanism can switch between the locked state and the unlocked state. When the locking mechanism switches to the unlocked state, the locking mechanism disengages from the second limit hook 2. At this time, the locking mechanism allows the second limit hook 2 to rotate between the fifth position and the sixth position.

[0054] When the locking mechanism switches to the locked state, it presses the second limit hook 2 to hold it in the fifth position, keeping it engaged with the first limit hook 1 and restricting its rotation to the sixth position. In other words, in the locked state, the locking mechanism prevents the second limit hook 2 from disengaging from the first limit hook 1, thus avoiding the problem of disengagement due to bumps or vibrations, and preventing the boom locking device from malfunctioning due to such conditions.

[0055] In addition, by using a locking mechanism to lock the second limit hook 2, the locking force required by the second limit hook 2 itself can be reduced, the pulling force required by the first flexible shaft 5 on the second limit hook 2 can be reduced, and the service life of the first flexible shaft 5 can be extended.

[0056] Furthermore, a transition connector 13 can be fixedly connected to the second limiting hook 2, and the first end of the first flexible shaft 5 can be connected to the transition connector 13. The transition connector 13 increases the distance between the first end of the first flexible shaft 5 and the rotation axis of the second limiting hook 2, and increases the lever arm of the force exerted by the first flexible shaft 5 on the second limiting hook 2, which can further reduce the requirement for the pulling force of the first flexible shaft 5 on the second limiting hook 2.

[0057] It should be noted that after the first flexible shaft 5 is released, the second limiting hook 2 rotates to the fifth position under its own gravity.

[0058] Alternatively, a third elastic element can be provided between the second limiting hook 2 and the deflection platform 4. The third elastic element is used to give the second limiting hook 2 a tendency to rotate towards the fifth position. After the first flexible shaft 5 is released, the second limiting hook 2 can automatically return to the fifth position under the action of the third elastic element, and increase the stability of the second limiting hook 2 in the fifth position. Specifically, the third elastic element can be a torsion spring.

[0059] In this embodiment of the invention, the boom locking device further includes a limiting component, which is disposed on the deflection platform 4 and is used to make the second limiting hook 2 rotate within the target angle range, so as to avoid the problem that the second limiting hook 2 cannot return to the fifth position due to excessive force applied to the first flexible shaft 5 and excessive rotation of the second limiting hook 2.

[0060] In a specific embodiment, the limiting component includes a first limiting block 14 and a second limiting block 15, which are disposed on the deflection platform 4.

[0061] The first limiting block 14 is located above the second limiting hook 2. When the second limiting hook 2 is in the sixth position, the first limiting block 14 abuts against the upper surface of the second limiting hook 2 to restrict the second limiting hook 2 from continuing to rotate upward.

[0062] The second limiting block 15 is located below the second limiting hook 2. When the second limiting hook 2 is in the fifth position, the second limiting block 15 abuts against the lower surface of the second limiting hook 2 to restrict the second limiting hook 2 from continuing to rotate downward.

[0063] In this embodiment of the invention, the locking mechanism includes a stopper 6, a locking member 7, and a driving member.

[0064] The stop 6 is positioned above the second limiting hook 2. The first end of the stop 6 is rotatably connected to the deflection platform 4, and the second end of the stop 6 is adapted to abut against the upper surface of the second limiting hook 2.

[0065] Specifically, the rotation axis of the stop member 6 relative to the deflection platform 4 can be made parallel to the rotation axis of the second limiting hook 2 relative to the deflection platform 4. For ease of explanation, it is now specified that the stop member 6 can rotate between a first position and a second position. When the stop member 6 rotates to the first position, the stop member 6 abuts against the upper surface of the second limiting hook 2, as shown in the figure. Figure 2 At this time, the locking mechanism is in the locked state; when the stop member 6 rotates to the second position, there is a gap between the stop member 6 and the second limit hook 2 located in the fifth position, as shown in the reference. Figure 3 and Figure 4 This allows the second limit hook 2 to rotate to the sixth position, at which point the locking mechanism is in the unlocked state.

[0066] The first end of the locking member 7 is rotatably connected to the blocking member 6. The rotation axis of the locking member 7 relative to the blocking member 6 is parallel to the rotation axis of the blocking member 6 relative to the deflection platform 4, and the rotation connection point between the locking member 7 and the blocking member 6 is located between the first end and the second end of the blocking member 6.

[0067] The second end of the locking member 7 is slidably connected to the deflection platform 4. When the second end of the locking member 7 slides relative to the deflection platform 4, it can drive the blocking member 6 to rotate between the first position and the second position.

[0068] For ease of explanation, it is now specified that the locking member 7 can move between the third position and the fourth position. When the locking member 7 moves to the third position, the locking member 7 causes the blocking member 6 to be in the first position. When the locking member 7 moves to the fourth position, the locking member 7 causes the blocking member 6 to be in the second position.

[0069] The driving component is used to drive the second end of the locking component 7 to slide back and forth relative to the deflection platform 4, so that the locking component 7 moves between the third position and the fourth position.

[0070] With this configuration, by controlling the drive component, the stop component 6 can be controlled to rotate between the first position and the second position, thereby achieving the state switching of the locking mechanism.

[0071] In this embodiment, a groove is provided on the upper surface of the second limiting hook 2, and a protrusion is provided on the second end of the abutment 6. When the second limiting hook 2 is in the fifth position and the abutment 6 is in the first position, the protrusion on the abutment 6 is exactly located in the groove on the second limiting hook 2. The reliability of the locking mechanism can be improved through the interaction between the protrusion and the groove.

[0072] In some embodiments, the drive component may be, but is not limited to, a cylinder, a hydraulic cylinder, an electric cylinder, a lead screw and nut transmission assembly, a gear and rack transmission assembly, etc.

[0073] In other embodiments, the drive element is configured as a flexible shaft structure. Specifically, the drive element includes a second flexible shaft 8, the first end of which is connected to the second end of the locking element 7, and the second end of the second flexible shaft 8 extends into the cab.

[0074] With this configuration, the driver can control the state switching of the unlocking device from inside the cab via the second flexible shaft 8, which is convenient to operate. Moreover, the mechanism of the drive component is simple and low in cost.

[0075] To ensure the reliability of the locking mechanism, in this embodiment of the invention, the locking mechanism further includes a first elastic element 9 and a second elastic element 10.

[0076] The first elastic element 9 is disposed between the abutment 6 and the deflection platform 4. The first elastic element 9 is used to make the abutment 6 have a tendency to rotate towards the first position. After the second flexible shaft 8 is released, the abutment 6 can automatically return to the first position under the action of the first elastic element 9, and can increase the clamping force of the abutment 6 on the second limiting hook 2.

[0077] The second elastic element 10 is disposed between the locking element 7 and the blocking element 6. The second elastic element 10 is used to make the locking element 7 tend to move to the third position. After the second flexible shaft 8 is released, the locking element 7 can automatically return to the third position under the action of the second elastic element 10, and can increase the force of the locking element 7 on the blocking element 6, thereby increasing the stability of the blocking element 6 in the first position.

[0078] In a specific embodiment, the first elastic element 9 and the second elastic element 10 can be selected as torsion springs.

[0079] In this embodiment, a guide structure is provided between the second end of the locking member 7 and the deflection platform 4 to guide the sliding of the second end of the locking member 7.

[0080] Specifically, the guiding structure includes a guide groove 11 and a guide post. The guide groove 11 is disposed on the deflection platform 4, and the guide post is disposed on the second end of the locking member 7. The guide post is embedded in the guide groove 11 and can slide back and forth along the guide groove 11. Through the cooperation between the guide post and the guide groove 11, the sliding trajectory of the second end of the locking member 7 can be determined, which helps to improve the stability of the locking mechanism.

[0081] The guide groove 11 is set as follows Figure 2 As shown, when the second limiting hook 2 is in the fifth position, the abutment 6 is in the first position, and the locking member 7 is in the third position, even if the abutment 6 tends to rotate to the second position due to bumps, vibrations, etc., the first end of the locking member 7 abuts against the side wall of the guide groove 11, which will restrict the movement of the locking member 7 to the fourth position, so that the locking mechanism remains in the locked state.

[0082] In a further embodiment, the guide post is cylindrical and rotatably connected to the locking member 7. The rotation axis of the guide post relative to the locking member 7 coincides with the central axis of the guide post, and the rotation axis of the guide post relative to the locking member 7 is perpendicular to the guide groove 11 and the locking member 7.

[0083] When the guide post slides in the guide groove 11, the guide post can rotate relative to the locking member 7. The friction between the guide post and the guide groove 11 is rolling friction, which can reduce the wear on the guide post and the guide groove 11.

[0084] Specifically, guide posts may, but are not limited to, using rollers.

[0085] In this embodiment of the invention, to facilitate the connection between the second flexible shaft 8 and the locking member 7, a pull ring 12 can be provided at the second end of the locking member 7, and the first end of the second flexible shaft 8 can be connected to the pull ring 12. The first end of the second flexible shaft 8 is sleeved on the pull ring 12, and the first end of the second flexible shaft 8 and the pull ring 12 are movably connected. When the locking member 7 moves relative to the deflection platform 4, it can adapt to the angle change between the second flexible shaft 8 and the locking member 7, avoid bending of the second flexible shaft 8, and extend the service life of the second flexible shaft 8.

[0086] When the second limiting hook 2 is engaged with the first limiting hook 1, and the locking mechanism is in the locked state, that is, the second limiting hook 2 is in the fifth position, the abutment 6 is in the first position, the locking member 7 is in the third position, and both the first flexible shaft 5 and the second flexible shaft 8 are in the released state. To release the lock on the excavator boom 3, the following steps are required:

[0087] Operate the second flexible shaft 8 to position the locking member 7 in the fourth position and the blocking member 6 in the second position;

[0088] Operate the first flexible shaft 5 to position the second limiting hook 2 in the sixth position;

[0089] By controlling the movement of the excavator boom 3 away from the second limit hook 2, the locking of the excavator boom 3 can be completed.

[0090] After the locking of the excavator boom 3 is released, the first flexible shaft 5 and the second flexible shaft 8 can be released.

[0091] If it is necessary to continue locking the excavator boom 3, the following steps are required:

[0092] Operate the second flexible shaft 8 to position the locking member 7 in the fourth position and the blocking member 6 in the second position;

[0093] Simultaneously operate the first flexible shaft 5 to position the second limiting hook 2 in the sixth position;

[0094] Control the excavator boom 3 to move towards the target position in the direction of approaching the second limit hook 2;

[0095] Release the first flexible shaft 5 so that the second limiting hook 2 is in the fifth position, and the second limiting hook 2 is engaged with the first limiting hook 1;

[0096] Release the second flexible shaft 8, so that the stop 6 is in the first position and the locking member 7 is in the third position.

[0097] In summary, the boom locking device provided by the embodiments of the present invention has the advantages of simple structure and convenient installation. It can effectively avoid the problem of boom locking device failure due to bumps and vibrations, and can directly add a locking mechanism to the existing boom locking device, thus solving the problem at a low cost.

[0098] On the other hand, embodiments of the present invention also provide a working machine, including the boom locking device provided in any of the above embodiments. The boom locking device provided in the above embodiments can effectively avoid the problem of boom locking device failure due to bumps and vibrations. Therefore, the working machine provided in the embodiments of the present invention has the advantages of high stability and high operational safety. The derivation process of the beneficial effects of the working machine in the embodiments of the present invention is largely similar to the derivation process of the beneficial effects of the boom locking device described above, so it will not be repeated here.

[0099] In embodiments of the present invention, the type of operating machinery is not limited; for example, the operating machinery can be an excavator, a backhoe loader, etc. In other words, as long as the operating machinery can use the boom locking device in the embodiments of the present invention, it is acceptable.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A boom locking device, characterized in that, include: A first limiting hook and a second limiting hook, wherein the first limiting hook is fixedly mounted on the boom, and the second limiting hook is rotatably mounted on the deflection platform, and the second limiting hook can engage or disengage with the first limiting hook. A first flexible shaft is connected to the second limiting hook, and the first flexible shaft is adapted to control the rotation of the second limiting hook; A locking mechanism is provided on the deflection platform. The locking mechanism can switch between a locked state and an unlocked state. In the locked state, the locking mechanism presses the second limiting hook so that the second limiting hook is held in a position engaged with the first limiting hook. In the unlocked state, the locking mechanism disengages from the second limiting hook to allow the second limiting hook to rotate. The locking mechanism includes: The abutment has a first end that is rotatably connected to the deflection platform, and a second end that is adapted to abut against the upper surface of the second limiting hook; A locking member has a first end that is rotatably connected to the blocking member. The rotatable connection point between the locking member and the blocking member is located between the first end and the second end of the blocking member. The second end of the locking member is slidably connected to the deflection platform to drive the blocking member to rotate. A driving element adapted to drive the second end of the locking element to slide back and forth relative to the deflection platform.

2. The boom locking device according to claim 1, characterized in that, The driving component includes: The second flexible shaft has its first end connected to the second end of the locking member, and the second end of the second flexible shaft extends into the driver's cab.

3. The boom locking device according to claim 2, characterized in that, When the abutment is against the second limiting hook, the position of the abutment is the first position; when the locking member makes the abutment be in the first position, the position of the locking member is the third position. The locking mechanism further includes: A first elastic element is disposed between the stop member and the deflection platform, and the first elastic element is adapted to give the stop member a tendency to rotate toward the first position; A second elastic element is disposed between the locking element and the blocking element, and the second elastic element is adapted to give the locking element a tendency to move toward the third position.

4. The boom locking device according to claim 2, characterized in that, A guide structure is provided between the second end of the locking member and the deflection platform, and the guide structure is adapted to guide the sliding of the second end of the locking member.

5. The boom locking device according to claim 4, characterized in that, The guiding structure includes: Guide grooves are provided on the deflection platform; A guide post is disposed at the second end of the locking member. The guide post is embedded in the guide groove and can slide back and forth along the guide groove.

6. The boom locking device according to claim 5, characterized in that, The guide post is cylindrical and rotatably connected to the locking member. The axis of rotation coincides with the central axis of the guide post and is perpendicular to the guide groove and the locking member.

7. The boom locking device according to claim 1, characterized in that, Also includes: A limiting component is disposed on the deflection platform, and the limiting component is adapted to allow the second limiting hook to rotate within a target angle range.

8. The boom locking device according to claim 2, characterized in that, The second end of the locking member is provided with a pull ring, and the first end of the second flexible shaft is connected to the pull ring.

9. A type of operating machinery, characterized in that, Includes the boom locking device as described in any one of claims 1 to 8.

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