Working arm locking system, its locking method, and emergency rescue equipment

Abstract

The present disclosure relates to a working arm locking system, a locking method thereof, and an emergency rescue device. The working arm locking system includes: a vehicle frame (1); a first boom (2) rotatably connected to a first end of the vehicle frame (1) along a first direction (x), and at least one of a bottom plate (21) and a side plate (22) of the first boom (2) is provided with a protrusion (23); and a locking device (3) provided at the top of the second end of the vehicle frame (1) along the first direction (x), configured to cooperate with the protrusion (23) so that the first boom (2) is in a locked state.

Description

Technical Field

[0001] The present disclosure relates to the field of emergency rescue equipment, and particularly to a working arm locking system, a locking method thereof, and an emergency rescue equipment. Background Art

[0002] In order to improve the operation efficiency and equipment effectiveness of emergency rescue equipment, most of its working arms are transported synchronously with the vehicle. The working arm is generally connected to the chassis through a slewing bearing or a hinge support. During operation, it can rotate 360° or expand within a certain set angle range for operation. When transferring or driving on the road, it will be retracted or folded to reduce the transportation size for easy transportation. When the emergency rescue equipment is driving or transporting, in order to shorten the time to reach the accident or danger scene, a relatively high driving speed is required. The driving speed requirement on paved roads is above 60 km / h, and the driving speed requirement on off-road roads is above 30 km / h. During driving or transportation, different road conditions such as potholes, bumps, gravel, and pebbles will be encountered. The road surface excitation generates impact loads on the equipment. At the same time, sudden situations such as emergency braking and steering need to be considered, and the working arm needs to bear braking force and centrifugal force.

[0003] There is a driving force during the operation of the connection mechanism between the working arm and the chassis to realize actions such as pitching and slewing of the working arm. During transportation, it is in a load-unloading state and is limited and locked by locking valves, mechanical limit brackets, etc. in the hydraulic system pipeline. During driving or transportation, under the action of braking force, centrifugal force, and road surface impact load, the working arm will swing or jump, generating reverse impacts with the slewing drive components, or colliding with the mechanical limit mechanism, or even disengaging from the limit mechanism, causing deformation or damage to the working arm or other components. Summary of the Invention

[0004] Embodiments of the present disclosure provide a working arm locking system, a locking method thereof, and an emergency rescue equipment, which can ensure reliable locking of the working arm.

[0005] According to a first aspect of the present disclosure, a working arm locking system is proposed, including:

[0006] A vehicle frame;

[0007] A first arm, rotatably connected to a first end of the vehicle frame along a first direction, and at least one of the bottom plate and the side plate of the first arm is provided with a protruding portion; and

[0008] A locking device, provided at the top of the second end of the vehicle frame along the first direction, and configured to cooperate with the protruding portion to make the first arm in a locked state.

[0009] In some embodiments, the locking device includes:

[0010] A connecting plate, fixed to the vehicle frame;

[0011] The first plate and the second plate are both connected to the connecting plate and extend away from the vehicle frame, and the first plate and the second plate are spaced apart from each other in the second direction, and the second direction is perpendicular to the first direction; and

[0012] The support plate is connected between the first plate and the second plate;

[0013] Wherein, in the locked state, the first boom is located between the first plate and the second plate and is placed on the support plate.

[0014] In some embodiments, the protruding portion is a locking pin assembly. The locking pin assembly is connected to the bottom plate of the first boom. The support plate is provided with a first notch, which is configured to, in the locked state, engage the locking pin assembly with the side wall of the first notch to lock the first boom. The opening of the first notch faces the first end of the vehicle frame.

[0015] In some embodiments, the bottom surface of the support plate has an inclined surface, and the inclined surface slopes upward gradually from the inner side near the first notch to the opening.

[0016] In some embodiments, the side wall of the first notch includes an arc segment and two hypotenuse segments. The arc segment is located inside the first notch and is configured to engage the locking pin assembly with the arc segment to lock the first boom. The two hypotenuse segments are respectively connected to the two ends of the arc segment, and are gradually expanded from the arc segment to the edge of the support plate to form an opening, which is configured to provide guidance for the locking pin assembly to engage with the arc segment.

[0017] In some embodiments, the locking pin assembly includes:

[0018] A pin seat plate, fixed to the bottom plate of the first boom; and

[0019] A locking pin, including a first boss, a second boss and a connecting member. The first boss and the second boss are spaced apart from each other. The first boss is connected to the pin seat plate. The connecting member is connected between the first boss and the second boss, and the outer diameter of the connecting member is smaller than that of the first boss and the second boss;

[0020] Wherein, the recessed portion formed by the first boss, the connecting member and the second boss engages with the side wall of the first notch to lock the first boom.

[0021] In some embodiments, the protruding portion is a locking plate. The locking plate is connected to the side plate of the first boom. At least one of the first plate and the second plate is provided with a second notch, which is configured to insert the locking plate into the second notch to limit the first boom. The opening of the second notch faces the first end of the vehicle frame.

[0022] In some embodiments, the side of the locking plate facing the second notch is provided with a chamfer, and the second notch includes a guiding surface that cooperates with the chamfer, which is configured to provide guidance for the locking plate to insert into the second notch.

[0023] In some embodiments, the opening formed at one end of the first plate and the second plate away from the connecting plate gradually expands from bottom to top.

[0024] In some embodiments, at least one of the first plate and the second plate is provided with a weight-reducing hole.

[0025] In some embodiments, a buffer pad is provided on the side of the support plate away from the connecting plate.

[0026] In some embodiments, the locking device further includes:

[0027] A third plate and a fourth plate, both connected between the first plate and the second plate, and the third plate and the fourth plate are arranged at intervals relative to each other along the first direction.

[0028] In some embodiments, third notches are provided at the upper end and / or the lower end of the third plate and / or the fourth plate.

[0029] In some embodiments, the working arm locking system further includes:

[0030] A slewing mechanism, rotatably arranged at the first end of the vehicle frame around a slewing center;

[0031] A third boom, the first end of which is rotatably connected to the slewing mechanism in a vertical plane; and

[0032] A second boom, the first end of which is rotatably connected to the second end of the third boom in a vertical plane, and the second end of the second boom is rotatably connected to the first boom in a vertical plane.

[0033] In some embodiments, the working arm locking system further includes:

[0034] A first driving component, arranged at the second end of the second boom, and configured to drive the first boom to perform pitching motion relative to the second boom in a vertical plane;

[0035] A second driving component, arranged at the slewing mechanism, and configured to drive the third boom to perform pitching motion relative to the slewing mechanism in a vertical plane; and

[0036] A third driving component, arranged at the second end of the third boom, and configured to drive the second boom to perform pitching motion relative to the third boom in a vertical plane.

[0037] According to the second aspect of the present disclosure, a working arm locking method for a working arm locking system based on the above embodiments is proposed, including:

[0038] Driving the first boom to move through the cooperation of the first driving component, the second driving component and the third driving component, so that the protruding part cooperates with the locking device to realize the locking of the first boom.

[0039] In some embodiments, the steps of engaging the protruding portion with the locking device to lock the first boom include:

[0040] Align the first boom with the vehicle frame and place it into the opening formed by the first plate and the second plate of the locking device;

[0041] Move the first boom in the direction away from the first end of the vehicle frame so that the protruding portion of the first boom engages with the side wall of the first notch and / or inserts into the second notch.

[0042] In some embodiments, the working boom locking method further includes:

[0043] Rotate the first boom to be in the same vertical plane as the locking device through the slewing mechanism; and / or

[0044] Lift the first boom by driving it with the first driving component, and reduce the angle between the second boom and the third boom by driving them with the second driving component and the third driving component.

[0045] According to the third aspect of the present disclosure, an emergency rescue equipment is provided, including the working boom locking system of the above embodiments.

[0046] In some embodiments, the emergency rescue equipment is a high-speed wheeled excavator.

[0047] Based on the above technical solutions, the working boom locking system of the embodiments of the present disclosure adopts a mechanical locking method in which the protruding portion cooperates with the locking device, which is stable, reliable and not prone to deformation. It can effectively improve the stability and service life, limit the movement range of the working boom of the articulated construction vehicle during high-speed driving or off-road driving, ensure the reliable locking of the working boom, and has high stability, avoiding collisions between the working boom and other components, thereby improving the safety of the whole vehicle in application scenarios such as high-speed driving or off-road driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings described herein are used to provide a further understanding of the present disclosure, and constitute a part of this application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation to the present disclosure. In the drawings:

[0049] Figure 1 is a schematic structural diagram of some embodiments of the working boom locking system of the present disclosure.

[0050] Figure 2 is a schematic structural diagram of some embodiments of the cooperation between the first boom and the locking device of the working boom locking system of the present disclosure.

[0051] Figure 3 is a schematic structural diagram of some embodiments of the locking device of the working boom locking system of the present disclosure.

[0052] Figure 4 Schematic structural diagrams of some embodiments of the locking pin assembly of the working arm locking system of the present disclosure.

[0053] Figure 5 Schematic structural diagrams of some embodiments of the cooperation between the first boom and the locking device of the working arm locking system of the present disclosure.

[0054] Figure 6 Schematic structural diagrams of some other embodiments of the locking device of the working arm locking system of the present disclosure.

[0055] Description of reference numerals

[0056] 1, vehicle frame; 2, first boom; 3, locking device; 4, slewing mechanism; 5, third boom; 6, second boom; 7, first driving component; 8, second driving component; 9, third driving component;

[0057] 21, bottom plate; 22, side plate; 23, protruding part; 24, locking pin assembly; 25, locking plate; 26, pin seat plate; 27, locking pin; 28, fastener; 251, chamfer; 271, first boss; 272, second boss; 273, connecting piece;

[0058] 31, first plate; 32, second plate; 33, third plate; 34, fourth plate; 35, connecting plate; 36, support plate; 37, tapered portion; 312, second notch; 313, guiding surface; 314, weight reduction hole; 333, third notch; 361, first notch; 362, inclined surface; 363, arc segment; 364, bevel segment; 365, buffer pad;

[0059] x, first direction; y, second direction; z, third direction. Detailed description of the embodiments

[0060] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect so defined can be combined with any other one or more aspects, unless clearly stated that they cannot be combined. In particular, any feature considered to be preferred or advantageous can be combined with one or more other features considered to be preferred or advantageous.

[0061] The terms "first", "second", etc. used in the present disclosure are only for convenience of description to distinguish different components with the same name, and do not indicate a sequence or primary-secondary relationship.

[0062] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by terms such as "inside", "outside", "above", "below", "left", "right", "front" or "rear" is defined based on the driver sitting on the cab seat. This is only for the convenience of describing the present disclosure, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the protection scope of the present disclosure.

[0063] First, the present disclosure provides a working arm locking system. In some exemplary embodiments, as Figures 1 to 6 shown, it includes:

[0064] A frame 1;

[0065] A first boom 2, rotatably connected to the first end of the frame 1 along the first direction x. At least one of the bottom plate 21 and the side plate 22 of the first boom 2 is provided with a protrusion 23; and

[0066] A locking device 3, provided at the top of the second end of the frame 1 along the first direction x, configured to cooperate with the protrusion 23 to keep the first boom 2 in a locked state.

[0067] Specifically, when the first boom 2 is in the locked state, based on the driver sitting on the cab seat, the first direction x can be the front-rear direction, the second direction y can be the left-right direction, and the third direction z can be the up-down direction. The second direction y is perpendicular to the first direction x, and the third direction z is perpendicular to the first direction x and the second direction y. Specifically, the first boom 2 is part of the working arm. Locking the first boom 2 is equivalent to locking the working arm. Specifically, the working arm locking system can achieve the mechanical locking and unfolding of the working arm by controlling the telescopic movement of the oil cylinder through a controller and a valve block, without the need to add an additional power source.

[0068] Specifically, when driving at high speed or off-road, the vehicle is subjected to impact loads such as uneven road surfaces, which may cause the working arm to jump or swing. If the locking direction between the working arm and the locking device is insufficient, it may cause the working arm to break away from the restricted range of the fixing device, posing a safety risk; more specifically, when the vehicle brakes, the working arm moves forward due to inertia. Adopting a static mechanical locking method with the protrusion cooperating with the locking device is stable, reliable and not prone to deformation, and can effectively improve the stability and service life of the locking system.

[0069] Specifically, to prevent the possible forward movement, swing or jump of the working arm, the locking device 3 can lock the first boom 2 at least in the direction away from the first end of the frame 1 in the first direction x, the second direction y, and the third direction z, that is, can mechanically lock the movement of the working arm in the front, left, right, up, and down five directions.

[0070] Optionally, the protruding portion 23 can be a locking pin assembly or a locking plate, etc. Optionally, the mechanical structure of the locking device 3 is used to lock the first boom 2. It can lock the movement of the working boom in all directions simultaneously. For example, by setting an automatically resetting baffle structure in the locking device 3, or increasing the locking strength of the cooperation between the locking device 3 and the protruding portion 23, etc.; it can also mechanically lock the movement of the working boom in the up, down, left, right, and front five directions simultaneously. For example, making the protruding portion 23 engage with the locking device 3, or making the protruding portion 23 enter the notch of the locking device 3, etc.

[0071] Optionally, the locking device 3 can be fixed to the top of the second end of the vehicle frame 1 along the first direction x by fasteners such as bolts, which is convenient for disassembly and replacement. Optionally, the working boom locking system can be applied to any articulated construction vehicle with high-speed driving or off-road requirements, such as high-speed construction machinery, emergency rescue equipment, etc. Optionally, the locking device 3 can be provided with side plates that gradually expand from bottom to top to reduce the difficulty of the locking operation and shorten the time of the locking operation. A buffer pad can be set on the locking device 3 to absorb the impact between the working boom and the vehicle frame 1.

[0072] This embodiment adopts a static mechanical locking method with the cooperation of the protruding portion 23 and the locking device 3, which is stable, reliable and not prone to deformation, and can effectively improve the stability and service life of the working boom locking system.

[0073] In the working boom locking system of this embodiment, the first boom 2 is in a locked state through the locking device 3, and then the mechanical locking of the working boom is completed. It can limit the movement range of the working boom of the articulated construction vehicle during high-speed driving or off-road driving, ensure the reliable locking of the working boom, with high stability, avoid collisions between the working boom and other components, and thus improve the safety of the whole vehicle in application scenarios such as high-speed driving or off-road driving.

[0074] In some embodiments, as Figures 1 to 6 shown, the locking device 3 includes:

[0075] A connecting plate 35, fixed to the vehicle frame 1;

[0076] A first plate 31 and a second plate 32, both connected to the connecting plate 35 and extending in a direction away from the vehicle frame 1, and the first plate 31 and the second plate 32 are spaced apart from each other along the second direction y, and the second direction y is perpendicular to the first direction x; and

[0077] A support plate 36, connected between the first plate 31 and the second plate 32;

[0078] Wherein, in the locked state, the first boom 2 is located between the first plate 31 and the second plate 32 and placed on the support plate 36.

[0079] Specifically, in the locked state, the first plate 31 and the second plate 32 can serve as two side plates of the locking device 3. More specifically, the first plate 31 and the second plate 32 can restrict the movement of the first boom 2 in the second direction y, that is, the first plate 31 and the second plate 32 can restrict the swing of the first boom 2 in the left - right direction. Specifically, the distance between the first plate 31 and the second plate 32, or rather, the distance between the two side plates, should be greater than the width of the first boom 2.

[0080] Specifically, the position of the support plate 36 in the third direction z of the locking device 3 can be set according to the distance between the working boom when locked and the top of the vehicle frame 1. More specifically, the support plate 36 supports the weight of the working boom and engages in a locking fit with the protruding portion 23. Optionally, the first plate 31 and the second plate 32 can be vertically connected to the connecting plate 35, or can be inclinedly connected to the connecting plate 35. Optionally, the connecting plate 35 can be fixed to the vehicle frame 1 by any fastener such as bolts. For example, using bolt connection facilitates disassembly, replacement.

[0081] In this embodiment, the movement of the first boom 2 in the second direction y is restricted by the first plate 31 and the second plate 32, and the weight of the working boom is supported by the support plate 36, making the locking safe, stable and highly reliable. It can restrict the movement range of the working boom of the articulated construction vehicle during high - speed driving or off - road driving, and avoid collision between the working boom and other components.

[0082] In some embodiments, as Figures 1 to 4 shown, the protruding portion 23 is a locking pin assembly 24. The locking pin assembly 24 is connected to the bottom plate 21 of the first boom 2. The support plate 36 is provided with a first notch 361, which is configured to, in the locked state, engage the locking pin assembly 24 with the side wall of the first notch 361 to achieve the locking of the first boom 2. The opening of the first notch 361 faces the first end of the vehicle frame 1.

[0083] Specifically, the engagement of the locking pin assembly 24 with the side wall of the first notch 361 can achieve the locking of the first boom 2 in the direction away from the first end of the vehicle frame 1 in the first direction x, the second direction y and the third direction z, or rather, achieve the locking of the working boom in the front, left, right, up and down directions. Specifically, the driver can control the driving component to make the locking pin assembly 24 on the first boom 2 engage with the inner side wall of the first notch 361 to achieve the locking of the first boom 2.

[0084] Specifically, the locking pin assembly 24 enters the inside of the first notch 361 through the opening of the first notch 361. For example, when the first boom 2 falls onto the support plate 36, the locking pin assembly 24 engages with the first notch 361 of the support plate 36. Optionally, the shape of the first notch 361 can be a V - shaped groove with a large opening at the edge and a small inner size, which facilitates the engagement and withdrawal of the locking pin assembly 24.

[0085] Optionally, a sensor may be provided in the first notch 361 to detect whether the locking pin assembly 24 reaches the inner side of the first notch 361, that is, the bottom of the V-shaped groove of the support plate. The detection signal is fed back to the cab through the controller, and a warning of the light color may be used when the locking is not in place.

[0086] In this embodiment, by engaging the locking pin assembly 24 with the side wall of the first notch 361, the locking of the first boom 2 can be effectively achieved. The locking is safe, stable and highly reliable, and can limit the movement range of the working boom of the articulated construction vehicle during high-speed driving or off-road driving, and avoid the collision of the working boom with other components.

[0087] In some embodiments, such as Figure 2 and Figure 3 as shown, the bottom surface of the support plate 36 has an inclined surface 362, and the inclined surface 362 gradually slopes upward from the inner side of the first notch 361 to the opening.

[0088] Specifically, the inclined surface 362 may extend from the opening of the first notch 361 to the inner side of the first notch 361, and the preset inclination angle of the inclined surface 362 may be a.

[0089] In this embodiment, by providing the inclined surface 362 with an angle of a on the bottom plane of the support plate 36, the locking pin assembly 24 can be more easily locked in place, reducing the difficulty of the locking operation and shortening the time of the locking operation.

[0090] In some embodiments, such as Figure 3 as shown, the side wall of the first notch 361 includes an arc segment 363 and two bevel segments 364. The arc segment 363 is located inside the first notch 361 and is configured to engage the locking pin assembly 24 with the arc segment 363 to achieve the locking of the first boom 2. The two bevel segments 364 are respectively connected to both ends of the arc segment 363, and are gradually expanded from the arc segment 363 to the edge of the support plate 36 to form an opening, and are configured to provide guidance for the locking pin assembly 24 to engage with the arc segment 363.

[0091] Specifically, the two bevel segments 364 are gradually expanded from the arc segment 363 to the edge of the support plate 36 to form an opening, and the opening faces the first end of the vehicle frame 1. The edge of the support plate 36 is the edge of the support plate 36 on the side close to the first end of the vehicle frame 1. Optionally, chamfers may be provided at the connection between the arc segment 363 and the bevel segment 364, and at the connection between the bevel segment 364 and the edge of the support plate 36 to increase the smoothness of the cooperation between the locking pin assembly 24 and the first notch 361, and make the locking pin assembly 24 more easily locked in place.

[0092] Specifically, during the locking process of the working arm, when the first boom 2 lands on the support plate 36, the locking pin assembly 24 enters the first notch 361 of the support plate 36 and can first be located between the two inclined edge segments 364 or overlap with the inclined edge segment 364. Then, the first boom 2 drives the locking pin assembly 24 to move in the direction away from the first end (or the front) of the vehicle frame 1 in the first direction x to the arc segment 363 and engages with the arc segment 363. During this process, the two inclined edge segments 364 can further precisely adjust the positions of the first boom 2 and the slewing mechanism 4, reducing the movement range of the first boom 2.

[0093] Specifically, the bottom surface of the support plate 36 may be provided with an inclined surface 362 with an angle of a. The inclined surface 362 cooperates with the inclined edge segment 364, which can further facilitate the locking pin assembly 24 to be locked in place. Optionally, a sensor may be provided within the arc segment 363 of the first notch 361 to detect whether the locking pin assembly 24 reaches the arc segment 363, or the bottom of the V-shaped groove of the support plate 36. The detection signal is fed back to the cab through the controller, and a warning can be given by the color of the light when the locking is not in place.

[0094] In this embodiment, by providing two inclined edge segments 364 that gradually expand from the arc segment 363 towards the edge of the support plate 36 to form an opening, the locking pin assembly 24 can enter the first notch 361 more smoothly, reducing the difficulty of the locking operation, shortening the time of the locking operation, and improving the driver's usage experience. Moreover, by providing guidance for the locking pin assembly 24 to engage with the arc segment 363 through the inclined edge segment 364, the positions of the first boom 2 and the slewing mechanism 4 can be precisely adjusted, reducing the movement range of the first boom 2, and improving the locking accuracy and safety of the working arm locking system.

[0095] In some embodiments, as Figure 2 and Figure 4 shown, the locking pin assembly 24 includes:

[0096] A pin seat plate 26, fixed to the bottom plate 21 of the first boom 2; and

[0097] A locking pin 27, including a first boss 271, a second boss 272, and a connecting member 273. The first boss 271 and the second boss 272 are relatively spaced apart. The first boss 271 is connected to the pin seat plate 26, the connecting member 273 is connected between the first boss 271 and the second boss 272, and the outer diameter of the connecting member 273 is smaller than that of the first boss 271 and the second boss 272;

[0098] Wherein, the recessed portion formed by the first boss 271, the connecting member 273, and the second boss 272 engages with the side wall of the first notch 361 to lock the first boom 2.

[0099] Specifically, in the locked state, the first boss 271 and the second boss 272 are arranged relatively spaced along the third direction z (vertical direction), and the third direction z is perpendicular to the first direction x and the second direction y. Specifically, the size of the inner side of the first notch 361 is slightly larger than the outer diameter of the connecting member 273, for example, the inner diameter of the arc segment 363 is larger than the outer diameter of the connecting member 273, so that the locking pin 27 is more easily engaged with the arc segment 363.

[0100] Specifically, the locking pin 27 slides relative to the support plate 36 during the fixed locking process. In the locked state, the recessed portion formed by the first boss 271, the connecting piece 273 and the second boss 272 engages with the first slot 361 to limit the upward or downward movement of the working arm along the third direction z (vertical direction). More specifically, the locking pin 27 engages with the side wall of the first slot 361, and can also limit the movement of the working arm along the first direction x away from the first end of the frame 1 and the second direction y.

[0101] Optionally, the first boss 271 and the second boss 272 may be in the shape of an oblate cylinder, or any other shape that can be engaged with the support plate 36. Optionally, the connector 273 may be in the shape of a cylinder or a prism, and correspondingly, the inner shape of the first notch 361 should match the structure of the connector 273. For example, when the connector 273 is a triangular prism, the arc segment 363 of the side wall of the first notch may be correspondingly set to a V-shaped segment.

[0102] Specifically, the pin seat plate 26 can be welded to the bottom plate 21 of the first arm 2 to provide a mounting position for the locking pin 27, and the first boss 271 can be fixed to the pin seat plate 26 by a fastener 28, such as a bolt, so as to facilitate disassembly and replacement. More specifically, when the first boss 271 is fixed to the pin seat plate 26 by bolts, corresponding bolt mounting holes are provided on the first boss 271 and the second boss 272, the length of the bolt is greater than the length of the connecting member 273, the bolt is installed through the circular hole, and the end surface of the bolt is higher than the bottom surface of the first boss 271 after tightening.

[0103] In this embodiment, the recessed portion of the locking pin 27 engages with the side wall of the first slot 361, so that the locking pin assembly 24 can be more easily engaged with the locking device 3, thereby achieving mechanical locking of the first arm 2 or the working arm in multiple directions, and effectively improving the safety, stability and service life of the working arm locking system.

[0104] In some embodiments, Figure 5 As shown, the protrusion 23 is a locking plate 25, which is connected to the side plate 22 of the first arm 2. At least one of the first plate 31 and the second plate 32 is provided with a second slot 312, which is configured to allow the locking plate 25 to be inserted into the second slot 312 to limit the first arm 2, and the opening of the second slot 312 faces the first end of the frame 1.

[0105] Specifically, the locking plate 25 can be welded to the side plate 22 of the first boom 2. The driver can make the locking plate 25 enter the second notch 312 to achieve locking through the telescopic movement of the working boom cylinder, etc., restricting the movement of the first boom 2 or the working boom. More specifically, the cooperation between the locking plate 25 and the second notch 312 can restrict the working boom from moving in the direction away from the first end of the vehicle frame 1 along the first direction x and the third direction z.

[0106] Specifically, the second notch 312 can be a groove that cooperates with the locking plate 25. More specifically, since the first plate 31 and the second plate 32 of the locking device 3 can already restrict the movement of the first boom 2 along the second direction y, the cooperation between the locking plate 25 and the second notch 312 can eliminate the need for locking along the second direction y. Optionally, the structure of the locking plate 25 can be set separately or combined with the locking pin assembly 24 of the above embodiment to achieve a better locking effect.

[0107] In this embodiment, by inserting the locking plate 25 into the second notch 312 on the side plate of the locking device 3, the locking of the first boom 2 can be effectively achieved. The locking is safe, stable and highly reliable, which can restrict the movement range of the working boom of the articulated construction vehicle during high-speed driving or off-road driving, and avoid collisions between the working boom and other components.

[0108] In some embodiments, as Figure 5 and Figure 6 shown, a chamfer 251 is provided on the side of the locking plate 25 facing the second notch 312, and the second notch 312 includes a guiding surface 313 that cooperates with the chamfer 251, configured to provide guidance for the locking plate 25 to insert into the second notch 312.

[0109] Specifically, the inclination angle of the guiding surface 313 should be the same as or close to the inclination angle of the chamfer 251 to achieve a better guiding effect.

[0110] In this embodiment, by providing the cooperating chamfer 251 and guiding surface 313, the locking plate 25 can enter the second notch 312 more smoothly, reducing the difficulty of the locking operation, shortening the time of the locking operation, and improving the driver's use experience.

[0111] In some embodiments, as Figures 3 to 6 shown, the opening formed by the ends of the first plate 31 and the second plate 32 away from the connecting plate 35 gradually expands from bottom to top.

[0112] Specifically, the inventors found that in order to ensure the locking effect, the gap between the two straight side plates of the locking device 3 and the first arm 2 needs to be set to a small value. It is difficult for the driver to perform the working arm locking operation. It is necessary to rely on operating experience and make multiple adjustments to place the working arm into the openings of the two side plates of the fixing device, which makes it time-consuming to switch between the working mode and the road driving mode, reducing the efficiency of equipment use. To further solve the above problem, this embodiment gradually expands the opening formed by the first plate 31 and the second plate 32 away from the end of the connecting plate 35 from bottom to top, so that the first arm 2 is easier to be placed in the opening formed by the first plate 31 and the second plate 32.

[0113] Specifically, the first plate 31 and the second plate 32 may include a gradually expanding portion 37, and optionally, the gradually expanding portion 37 may be a flat plate or a curved plate. Specifically, the distance between the first plate 31 and the second plate 32 is only slightly larger than the width of the first arm 2 at the plane where the support plate 36 is located to limit the movement of the first arm 2 along the second direction y, and is larger than the width of the first arm 2 at the end surface where the opening is formed to facilitate the first arm 2 to enter the locked position.

[0114] Specifically, the driver's control of the slewing mechanism is affected by the inertia force of the slewing mechanism, the mechanism transmission chain and the matching clearance between the various components, making it difficult to control it accurately and having a relatively poor positioning accuracy. The two side plates of the locking device 3 gradually expand outward from bottom to top, reducing the requirements for the slewing accuracy of the slewing mechanism, making it easier for the first arm 2 to enter the opening formed by the first plate 31 and the second plate 32. During the falling process of the first arm 2, it is restricted by the two side plates of the locking device 3 and slides along the two gradually expanding portions 37 to contact the support plate 36, so as to achieve precise fine-tuning of the position of the working arm.

[0115] This embodiment arranges the two side plates of the locking device 3 to expand gradually from bottom to top, which can facilitate the first arm 2 to enter the locking position between the two side plates when the working arm is folded, reducing the operating difficulty, improving the driver's experience, shortening the folding operation time and the time for the whole vehicle to switch from the working state to the driving state; at the same time, the force of the falling first arm 2 can be used to adjust the position of the slewing mechanism, drive the slewing mechanism to the locking position, further narrow the moving range of the first arm 2, and improve the locking accuracy of the working arm.

[0116] In some embodiments, Figures 1 to 6 As shown, at least one of the first plate 31 and the second plate 32 is provided with a weight-reducing hole 314 .

[0117] This embodiment provides a weight-reducing hole 314 on the side panel of the locking device 3, thereby reducing the weight of the locking device 3 while ensuring the supporting strength of the support plate 36. It also facilitates observation of the coordination between the locking pin assembly 24 and the locking device 3, which is beneficial to improving the safety and stability of the working arm locking device.

[0118] In some embodiments, as Figures 2 to 6 shown, a buffer pad 365 is provided on the side of the support plate 36 away from the connection plate 35.

[0119] Specifically, the buffer pad 365 is installed on the upper part of the support plate 36, for example, fixed to the upper part of the support plate 36 through fasteners 28 such as bolts. Specifically, when the working arm is in the locked state, the buffer pad 365 contacts the bottom plate 21 of the first boom 2. When the first boom 2 of the working arm falls and locks, it is compressed and deformed, and the deformation recovers after the locking is cancelled. When the first boom 2 of the working arm falls, it preferentially contacts the buffer pad 365 to absorb the impact between the working arm and the support plate 36 of the locking device 3. Optionally, when there is sufficient installation space, the buffer pad 365 can be installed at any position on the support plate 36. For example, the buffer pad 365 can be installed on both sides of the support plate 36 near the two side plates to avoid the first notch 361, and can also be installed in the middle position of the support plate 36 when there is no first notch 361.

[0120] Specifically, the buffer pad 365 is compressed and deformed when the working arm is locked, and the deformation recovers when the working arm is deployed for operation. More specifically, during the forward movement and locking process of the first boom 2, affected by the bottom inclined surface 362 of the support plate 36, the first boom 2 moves downward a certain distance to compress the buffer pad 365. The elastic deformation of the buffer pad 365 offsets the gap between the locking pin 27 and the support plate 36, further reducing the movement range of the first boom 2 and improving the reliability of the locking of the working arm.

[0121] Optionally, the buffer pad 365 can be made of any elastic material. Specifically, the inventor found during the experiment that when the buffer pad is made of nylon material, the elastic compression deformation ability is poor and it is easy to crack and damage during use. Therefore, preferably, the buffer pad 365 can be made of rubber material.

[0122] The buffer pad of this embodiment can offset the gap between the working arm and the locking device through elastic compression deformation, absorb the impact between the working arm and the vehicle frame, avoid the rigid collision between the working arm and other components, and at the same time can further reduce the movable range of the first boom, ensure the reliable locking of the working arm, and ensure the safety and reliability of the locking of the working arm during the driving of the whole vehicle.

[0123] In some embodiments, as Figures 2 to 6 shown, the locking device 3 further includes:

[0124] A third plate 33 and a fourth plate 34, both connected between the first plate 31 and the second plate 32, and the third plate 33 and the fourth plate 34 are spaced apart from each other along the first direction x.

[0125] Specifically, the third plate 33 and the fourth plate 34 can be rib plates, which play a role in strengthening the structural strength and can enhance the support stability and locking safety of the locking device 3.

[0126] In this embodiment, by providing rib plates in the locking device, the load-bearing capacity of the locking device 3 can be improved, the support stability and locking safety of the locking device 3 can be enhanced, and thus the stability, safety and service life of the working arm locking system can be effectively improved.

[0127] In some embodiments, as Figures 2 to 6 shown, a third notch 333 is provided at the upper end and / or the lower end of the third plate 33 and / or the fourth plate 34.

[0128] Specifically, when the protruding portion 23 is the locking pin assembly 24, the third notch 333 provided at the upper end of the third plate 33 and / or the fourth plate 34 can facilitate the locking pin 27 of the first boom 2 to enter and exit the first notch 361 on the support plate 36. Specifically, the third notch 333 provided at the lower end of the third plate 33 and / or the fourth plate 34 can simultaneously provide a wrench space for bolt installation and play a role in weight reduction, such as providing a wrench space for the fixing bolts of the connecting plate 35.

[0129] Optionally, when the above functions can be achieved, the shape of the third notch 333 is not limited herein. For example, it can be a semi-circular notch. Preferably, when the protruding portion 23 is the locking pin assembly 24, the third notch 333 is provided at the upper end of one of the third plate 33 and the fourth plate 34 that is closer to the first end of the vehicle frame 1.

[0130] In this embodiment, by providing the third notch 333, it is not only possible to facilitate the locking pin 27 of the first boom 2 to enter and exit the first notch 361 on the support plate 36, but also to provide a wrench space for bolt installation and play a role in weight reduction.

[0131] In some embodiments, as Figure 1 shown, the working arm locking system further includes:

[0132] A slewing mechanism 4, rotatably provided at the first end of the vehicle frame 1 around a slewing center;

[0133] A third boom 5, whose first end is rotatably connected to the slewing mechanism 4 in a vertical plane; and

[0134] A second boom 6, whose first end is rotatably connected to the second end of the third boom 5 in a vertical plane, and the second end of the second boom 6 is rotatably connected to the first boom 2 in a vertical plane.

[0135] Specifically, the working arm may include a first boom 2, a second boom 6, and a third boom 5. The working arm can perform pitching motion in a vertical plane, and the slewing mechanism 4 can drive the working arm to perform slewing motion in a horizontal plane. Specifically, by locking the first boom 2 in the third direction z by the locking device 3, the pitching motion of the working arm can be blocked. By locking the first boom 2 in the second direction y by the locking device 3, the slewing motion of the working arm can be blocked. More specifically, the process of locking the first boom 2 by means of the locking device 3 is also a process of adjusting and locking the second boom 6, the third boom 5, and the slewing mechanism 4.

[0136] In some embodiments, as Figure 1 shown, the working arm locking system further includes:

[0137] A first driving component 7, provided at the second end of the second boom 6, configured to drive the first boom 2 to perform pitching motion relative to the second boom 6 in a vertical plane;

[0138] A second driving component 8, provided on the slewing mechanism 4, configured to drive the third boom 5 to perform pitching motion relative to the slewing mechanism 4 in a vertical plane; and

[0139] A third driving component 9, provided at the second end of the third boom 5, configured to drive the second boom 6 to perform pitching motion relative to the third boom 5 in a vertical plane.

[0140] Specifically, in the operation mode, the driving forces of the first driving component 7, the second driving component 8, and the third driving component 9 exist to achieve actions such as pitching of the working arm. In the transportation mode, the first driving component 7, the second driving component 8, and the third driving component 9 are in a load-unloading state, and at this time, the locking system of the above embodiments plays a role of mechanical locking. Optionally, the first driving component 7, the second driving component 8, and the third driving component 9 can be any driving components, such as telescopic oil cylinders or electric telescopic rods, etc.

[0141] Secondly, the present disclosure provides a working arm locking method for a working arm locking system based on the above embodiments, including:

[0142] Driving the first boom 2 through the cooperation of the first driving component 7, the second driving component 8, and the third driving component 9, so that the protruding portion 23 cooperates with the locking device 3 to achieve locking of the first boom 2.

[0143] Specifically, the working arm locking control method is the control sequence of the working arm boom and the driving components (such as the telescopic method of the oil cylinder) when the working arm switches from the operation mode to the locking mode. The deployment sequence when the working arm switches from the locking mode to the operation mode is opposite to it.

[0144] The working arm locking method of this embodiment utilizes the original working arm frame and driving components of the working arm, without adding an additional power source. By locking the first arm frame 2 to limit the movement of the vehicle-mounted working arm, mechanical locking between the working arm and the frame is achieved, which can effectively improve the locking stability of the working arm, thereby improving the safety of the entire vehicle in application scenarios such as high-speed driving or off-road driving.

[0145] In some embodiments, the step of making the protrusion 23 cooperate with the locking device 3 to achieve locking of the first arm 2 includes:

[0146] Make the first arm 2 parallel to the frame 1 and fall into the opening formed by the first plate 31 and the second plate 32 of the locking device 3;

[0147] The first arm 2 is moved in a direction away from the first end of the vehicle frame 1 , so that the protrusion 23 of the first arm 2 is engaged with the side wall of the first notch 361 and / or inserted into the second notch 312 .

[0148] Specifically, the first arm 2 moves along the first direction x in a direction away from the first end of the frame 1 .

[0149] The locking method of this embodiment can effectively lock the first arm 2 by controlling the driving component to make the first arm 2 fall parallel to the locking device 3 or make the protrusion of the first arm 2 cooperate with the locking device 3. The locking is safe, stable and reliable, and can limit the movement range of the working arm of the arm-type engineering vehicle during high-speed driving or off-road driving, avoiding collision between the working arm and other parts, thereby improving the safety of the entire vehicle in application scenarios such as high-speed driving or off-road driving.

[0150] In some embodiments, the working arm locking method further includes:

[0151] The first arm 2 is rotated by the slewing mechanism 4 to be in the same vertical plane as the locking device 3; and / or

[0152] The first boom 2 is driven to be lifted by the first driving component 7 , and the angle between the second boom 6 and the third boom 5 is reduced by the second driving component 8 and the third driving component 9 .

[0153] In some specific embodiments, the first driving component 7, the second driving component 8 and the third driving component 9 are telescopic cylinders, and the working arm moves from the working The mode is switched to the locking modeThe hour-rotation mechanism drives the working arm to rotate to the same vertical plane as the locking device 3. The first oil cylinder contracts to drive the first boom to lift. The second oil cylinder extends and the third oil cylinder contracts to reduce the angle between the second boom 6 and the third boom 5. At the same time, the combined action of the three oil cylinders makes the first boom 2 reach a position substantially parallel to the top plane of the vehicle frame 1 and fall into the opening formed by the first plate 31 and the second plate 32 of the locking device 3. The two side plates limit the left-right movement range of the working arm along the second direction y. The combined action of the three oil cylinders moves the working arm forward so that the protrusion 23 provided on the first boom 2 engages with the side wall of the first notch 361 and / or inserts into the second notch 312 to limit the movement of the working arm in the up, down, left, right, and front five directions. The principles of the working arm deployment method and the locking method are basically the same, so they will not be elaborated here.

[0154] Again, the present disclosure also provides an emergency rescue equipment, including the working arm locking system as described in the above embodiments.

[0155] For the emergency rescue equipment of this embodiment, the working arm is locked by the mechanical locking method in which the protrusion 23 of the working arm locking system cooperates with the locking device 3. It is stable, reliable and not prone to deformation, can effectively prevent the working arm from colliding with other components, and can improve the safety in application scenarios such as high-speed driving or off-road driving.

[0156] In some embodiments, the emergency rescue equipment is a high-speed wheeled excavator.

[0157] For the high-speed wheeled excavator of this embodiment, the working arm is locked by the mechanical locking method in which the protrusion 23 of the working arm locking system cooperates with the locking device 3. It is stable, reliable and not prone to deformation, can effectively prevent the working arm from colliding with other components, and can improve the safety in application scenarios such as high-speed driving or off-road driving.

[0158] The above has introduced in detail a working arm locking system and its locking method, and an emergency rescue equipment provided by the present disclosure. Specific embodiments are used herein to elaborate on the principles and implementation manners of the present disclosure. The description of the above embodiments is only used to help understand the method and its core idea of the present disclosure. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present disclosure, several improvements and modifications can be made to the present disclosure, and these improvements and modifications also fall within the protection scope of the claims of the present disclosure.

Claims

1. A working arm locking system, characterized in that, Comprising: A vehicle frame (1); A first boom (2) rotatably connected to a first end of the vehicle frame (1) along a first direction (x), with a protruding portion (23) provided on at least one of a bottom plate (21) and a side plate (22) of the first boom (2); and A locking device (3) provided at the top of a second end of the vehicle frame (1) along the first direction (x), configured to cooperate with the protruding portion (23) to bring the first boom (2) into a locked state; The locking device (3) includes: a connecting plate (35) fixed to the vehicle frame (1); a first plate (31) and a second plate (32), both connected to the connecting plate (35) and extending in a direction away from the vehicle frame (1), and the first plate (31) and the second plate (32) are spaced apart from each other along a second direction (y) perpendicular to the first direction (x); and a support plate (36) connected between the first plate (31) and the second plate (32); Wherein, in the locked state, the first boom (2) is located between the first plate (31) and the second plate (32) and placed on the support plate (36).

2. The working arm locking system according to claim 1, characterized in that, The protruding portion (23) is a locking pin assembly (24), the locking pin assembly (24) is connected to the bottom plate (21) of the first boom (2), and a first notch (361) is provided on the support plate (36), configured to, in the locked state, engage the locking pin assembly (24) with the side wall of the first notch (361) to lock the first boom (2), and the opening of the first notch (361) faces the first end of the vehicle frame (1).

3. The working arm locking system according to claim 2, wherein, The bottom surface of the support plate (36) has an inclined surface (362) that slopes upward gradually from the inside near the first notch (361) to the opening.

4. The working arm locking system according to claim 2, wherein, The side wall of the first notch (361) includes an arc segment (363) and two inclined side segments (364), the arc segment (363) is located inside the first notch (361), configured to engage the locking pin assembly (24) with the arc segment (363) to lock the first boom (2), and the two inclined side segments (364) are respectively connected to both ends of the arc segment (363) and gradually expand from the arc segment (363) to the edge of the support plate (36) to form an opening, configured to provide guidance for the locking pin assembly (24) to engage with the arc segment (363).

5. The working arm locking system according to claim 2, wherein, The locking pin assembly (24) includes: A pin seat plate (26) fixed to the bottom plate (21) of the first boom (2); and The locking pin (27) includes a first boss (271), a second boss (272) and a connecting member (273). The first boss (271) and the second boss (272) are arranged at intervals relative to each other. The first boss (271) is connected to the pin seat plate (26). The connecting member (273) is connected between the first boss (271) and the second boss (272), and the outer diameter of the connecting member (273) is smaller than that of the first boss (271) and the second boss (272). Wherein, the recessed part formed by the first boss (271), the connecting member (273) and the second boss (272) engages with the side wall of the first notch (361) to lock the first boom (2).

6. The working arm locking system according to claim 1, characterized in that, The protruding part (23) is a locking plate (25). The locking plate (25) is connected to the side plate (22) of the first boom (2). At least one of the first plate (31) and the second plate (32) is provided with a second notch (312), which is configured to insert the locking plate (25) into the second notch (312) to limit the first boom (2). The opening of the second notch (312) faces the first end of the vehicle frame (1).

7. The working arm locking system according to claim 6, wherein, A chamfer (251) is provided on one side of the locking plate (25) facing the second notch (312). The second notch (312) includes a guiding surface (313) that cooperates with the chamfer (251), and is configured to guide the insertion of the locking plate (25) into the second notch (312).

8. The working arm locking system according to any one of claims 1 to 7, characterized in that, The opening formed at the ends of the first plate (31) and the second plate (32) away from the connecting plate (35) gradually expands from bottom to top.

9. The working arm locking system according to any one of claims 1 to 7, characterized in that, At least one of the first plate (31) and the second plate (32) is provided with a weight-reducing hole (314).

10. The working arm locking system according to any one of claims 1 to 7, characterized in that, A buffer pad (365) is provided on the side of the support plate (36) away from the connecting plate (35).

11. The working arm locking system according to any one of claims 1 to 7, characterized in that, The locking device (3) further includes: A third plate (33) and a fourth plate (34), both connected between the first plate (31) and the second plate (32), and the third plate (33) and the fourth plate (34) are arranged at intervals relative to each other along the first direction (x).

12. The working arm locking system according to claim 11, characterized in that, A third notch (333) is provided at the upper end and / or the lower end of the third plate (33) and / or the fourth plate (34).

13. The working arm locking system according to any one of claims 1 to 7, characterized in that, Further included: A slewing mechanism (4), rotatably arranged at the first end of the vehicle frame (1) around a slewing center; A third boom (5), the first end of which is rotatably connected to the slewing mechanism (4) in a vertical plane; and A second boom (6), the first end of which is rotatably connected to the second end of the third boom (5) in a vertical plane, and the second end of the second boom (6) is rotatably connected to the first boom (2) in a vertical plane.

14. The working arm locking system according to claim 13, wherein, Further included: A first driving component (7), arranged at the second end of the second boom (6), and configured to drive the first boom (2) to perform a pitching motion relative to the second boom (6) in a vertical plane. A second driving member (8) is provided on the slewing mechanism (4) and is configured to drive the third boom (5) to perform pitching motion relative to the slewing mechanism (4) in a vertical plane; and A third driving member (9) is provided at the second end of the third boom (5) and is configured to drive the second boom (6) to perform pitching motion relative to the third boom (5) in a vertical plane.

15. A working arm locking method based on the working arm locking system according to any one of claims 1 to 14, characterized in that, It includes: The first boom (2) is driven to move by the cooperation of the first driving member (7), the second driving member (8) and the third driving member (9), so that the protruding portion (23) cooperates with the locking device (3) to realize the locking of the first boom (2).

16. The working arm locking method according to claim 15, wherein, The steps of making the protruding portion (23) cooperate with the locking device (3) to realize the locking of the first boom (2) include: Making the first boom (2) parallel to the vehicle frame (1) and fall into the opening formed by the first plate (31) and the second plate (32) of the locking device (3); Moving the first boom (2) in the direction away from the first end of the vehicle frame (1) so that the protruding portion (23) of the first boom (2) is engaged with the side wall of the first notch (361) and / or inserted into the second notch (312).

17. The working arm locking method according to claim 15 or 16, characterized in that, It also includes: Rotating the first boom (2) to be in the same vertical plane as the locking device (3) through the slewing mechanism (4); and / or Lifting the first boom (2) by driving the first driving member (7), and reducing the included angle between the second boom (6) and the third boom (5) by the second driving member (8) and the third driving member (9).

18. An emergency rescue equipment, characterized in that, It includes the working boom locking system according to any one of claims 1 to 14.

19. The emergency rescue equipment according to claim 18, wherein, The emergency rescue equipment is a high-speed wheeled excavator.

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