Landing leg lock and engineering machinery chassis
By designing leg locks that are adapted to different chassis and vehicle models, and using leg locks that rotate and telescopic with hooks, the problem of inconsistent locking positions in the prior art is solved, and the locking effect is easy to install, stable, reliable and low-cost.
Patent Information
- Application Number
- CN202422156954.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The locking positions of the leg locks of existing concrete pump trucks are inconsistent, resulting in redundant structure, increased cost, unsightly appearance and error-prone, affecting safe operation.
A leg lock is designed to achieve locking through the rotation and expansion of the hook part, adapted to different chassis and vehicle models, and used an operating handle to drive the locking member to move in the movable cavity, combining the limiting plate and plug-in to ensure stability.
It realizes the versatility of the outrigger lock, is easy to install, and has stable and reliable work, which reduces production costs and avoids structural redundancy and installation errors.
Smart Images
Figure CN223045717U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engineering machinery locking, in particular to a outrigger lock and an engineering machinery chassis. Background Art
[0002] For a concrete pump truck, as one of the most important components during its operation, the safe use of the rear outriggers is of great significance, which is crucial for the safe operation of the entire pump truck. When the pump truck is in the driving state, it is necessary to ensure that the rear outriggers of the pump truck can be stably locked on the subframe, and an outrigger lock is required to lock the rear outriggers of the pump truck; when the pump truck is in the pumping state, the outrigger lock unlocks the rear outriggers of the pump truck, and at this time, the rear outriggers of the pump truck can be quickly opened in place.
[0003] A set of upper structure parts of a concrete pump truck needs to be matched with multiple chassis. Since the chassis are different, the locking positions of the outrigger locks are also different, which leads to the need to set multiple fixing positions for the outrigger locks, resulting in redundant structure, increased cost and unaesthetic appearance. This not only easily causes stress concentration at the welded joints of the outrigger lock mounting seats, but also the excessive design of the locking positions is prone to errors during assembly, and misinstallation is likely to occur, resulting in the invalidation of the outrigger lock. Summary of the Utility Model
[0004] In view of this, the utility model provides an outrigger lock, which is convenient to use, has stable working effect and good reliability.
[0005] An outrigger lock includes a locking member, a mounting cylinder and an operating handle. An activity cavity is arranged in the mounting cylinder, and an adjusting groove communicated with the activity cavity is arranged on the side wall of the mounting cylinder. One end of the locking member is installed in the activity cavity, a hooking part is arranged at the other end of the locking member, the operating handle passes through the adjusting groove and is connected with the locking member. The adjusting groove includes a first groove section, a second groove section and a third groove section which are sequentially communicated. Moving the operating handle along the first groove section and the third groove section can drive the locking member to gradually move into or out of the activity cavity, and moving the operating handle along the second groove section can drive the locking member to rotate, so that the hooking part forms a first posture for hooking, or switches from the first posture to a second posture for unlocking the hooking function.
[0006] In an embodiment of the utility model, the first groove section and the third groove section are parallel and oppositely arranged, and the second groove section is connected between the first groove section and the third groove section.
[0007] In an embodiment of the utility model, the first groove section and the third groove section are both arranged along the axial direction of the mounting cylinder, and the second groove section is arranged along the circumferential direction of the mounting cylinder.
[0008] In an embodiment of the present utility model, two limiting plates are fixed on the side wall of the above-mentioned mounting cylinder. The two limiting plates are respectively located on opposite sides of the third groove section and are arranged along the length direction of the third groove section. A plurality of through holes are provided on each limiting plate. The leg lock further includes a plug-in member, and the plug-in member can be inserted into the through holes of the two limiting plates to limit the operation handle.
[0009] In an embodiment of the present utility model, the above-mentioned plug-in member includes a first pin, a second pin and an elastic spiral part. The first pin and the second pin are arranged opposite to each other, and both the first pin and the second pin are connected to the elastic spiral part. When the first pin is inserted into the through holes of the two limiting plates, the second pin abuts against the edge of the limiting plate by the elastic force of the elastic spiral part.
[0010] In an embodiment of the present utility model, the above-mentioned mounting cylinder includes a cylinder body and a first cover plate and a second cover plate connected to both ends of the cylinder body. The first cover plate is provided with a through hole for the locking member to extend out, and the second cover plate is provided with an exhaust hole for exhausting the gas in the moving cavity.
[0011] In an embodiment of the present utility model, the above-mentioned locking member includes a rod part and a piston part. The piston part is arranged in the moving cavity. One end of the rod part is connected to the hooking part, and the other end of the rod part passes through the through hole and is connected to the piston part. The leg lock further includes a first elastic member, and the first elastic member is arranged in the moving cavity. One end of the first elastic member abuts against the first cover plate, and the other end of the first elastic member abuts against the piston part.
[0012] In an embodiment of the present utility model, the above-mentioned locking member includes a rod part and a piston part. The piston part is arranged in the moving cavity. One end of the rod part is connected to the hooking part, and the other end of the rod part passes through the through hole and is connected to the piston part. The leg lock further includes a second elastic member, and the second elastic member is arranged in the moving cavity. One end of the second elastic member is connected to the second cover plate, and the other end of the second elastic member is connected to the piston part. When the operation handle moves along the first groove section or the third groove section to drive the locking member to gradually move into or out of the moving cavity, the second elastic member is gradually compressed or stretched.
[0013] In an embodiment of the present utility model, the above-mentioned leg lock further includes a fixing plate, and the fixing plate is connected to the side wall of the mounting cylinder. A plurality of connection holes are provided on the fixing plate.
[0014] This application also relates to a construction machinery chassis, including the above-mentioned leg lock.
[0015] In an embodiment of the present utility model, the construction machinery chassis further includes a subframe and outriggers. An installation seat is connected to the subframe, and the end of the outrigger is rotatably connected to the installation seat. The outrigger lock is fixed to the subframe, and operating the operating handle can drive the locking member to lock or unlock the outrigger.
[0016] The outrigger lock of the present utility model is used to lock the outriggers of the construction machinery chassis. The operating handle can move along the first groove section and the third groove section to drive the locking member to extend or contract. When the operating handle moves along the second groove section, the locking member rotates by a certain angle so that the hooking portion forms a first posture for hooking action or switches from the first posture to a second posture for unlocking the hooking action. When the hooking portion is in the first posture, the locking member is driven by the operating handle to contract until the hooking portion hooks the outrigger. At this time, the hooking portion can restrict the rotation of the outrigger to achieve the locking action of the outrigger. Since the locking form of this outrigger lock is to lock the outrigger by hooking it, and the length of different outriggers can be adapted by driving the locking member to expand and contract, this outrigger lock can be adapted to different chassis, different vehicle models, different lower vehicle structures, and different outriggers. This outrigger lock is fixedly connected to the construction machinery chassis, is easy to install, has strong versatility, and does not need to repeatedly adjust the installation position because the telescopic movement of the locking member can compensate for the installation error. Therefore, the outrigger lock of the present application is convenient to use, has stable working effects, good reliability, and the outrigger lock has a simple structure, low manufacturing precision, and low cost. Brief Description of the Drawings
[0017] Figure 1 is a schematic structural diagram of the outrigger lock in the unlocked state according to the first embodiment of the present application.
[0018] Figure 2 is Figure 1 a schematic structural diagram of another perspective of the outrigger lock shown.
[0019] Figure 3 is a schematic structural diagram of the outrigger lock in the locked state according to the first embodiment of the present application.
[0020] Figure 4 is a schematic cross-sectional structural diagram of the outrigger lock according to the first embodiment of the present application.
[0021] Figure 5 is a schematic cross-sectional structural diagram of the outrigger lock according to the second embodiment of the present application.
[0022] Figure 6 is a schematic structural diagram of the outrigger lock of the construction machinery chassis unlocking the outrigger according to the third embodiment of the present application.
[0023] Figure 7 is Figure 6 a schematic side view structural diagram of the construction machinery chassis shown.
[0024] Figure 8 is Figure 7 a partially enlarged structural schematic diagram of a construction machinery chassis as shown.
[0025] Figure 9 is a structural schematic diagram when the outrigger lock of the construction machinery chassis in the third embodiment of the present application locks the outrigger.
[0026] Figure 10 is Figure 9 a partially enlarged structural schematic diagram of a construction machinery chassis as shown.
[0027] Locking mechanism 10, locking member 12, mounting cylinder 13, operating handle 14, plug-in member 15, first elastic member 16, fixing plate 17, second elastic member 18, hooking portion 121, rod portion 122, piston portion 123, moving cavity 101, adjusting groove 102, first groove section 1021, second groove section 1022, third groove section 1023, limiting plate 131, cylinder body 132, first cover plate 133, second cover plate 134, through hole 103, through hole 104, exhaust hole 105, first pin 151, second pin 152, elastic spiral portion 153, connection hole 106, subframe 20, outrigger 30, mounting seat 21. Detailed implementation manners
[0028] The following specific embodiments illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification.
[0029] In the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It should be understood that other embodiments may also be used, and mechanical composition, structure, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description should not be considered restrictive. The terms used herein are only for describing specific embodiments and are not intended to limit the present application.
[0030] Although in some instances the terms first, second, etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.
[0031] Furthermore, as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the features, steps, operations, elements, components, items, kinds, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are to be construed as inclusive, meaning either any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C". An exception to this definition occurs only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.
[0032] The first embodiment
[0033] Figure 1 is a schematic structural view of the outrigger lock of the first embodiment of the present application in an unlocked state. Figure 2 is Figure 1 a schematic structural view of another perspective of the outrigger lock shown. Figure 3 is a schematic structural view of the outrigger lock of the first embodiment of the present application in a locked state. Figure 4 is a schematic cross-sectional view of the outrigger lock of the first embodiment of the present application.
[0034] Please refer to Figures 1 to 4 , the outrigger lock 10 of this embodiment includes a locking member 12, a mounting cylinder 13, and an operating handle 14. An activity cavity 101 is provided in the mounting cylinder 13, and an adjustment groove 102 communicating with the activity cavity 101 is provided on the side wall of the mounting cylinder 13. One end of the locking member 12 is installed in the activity cavity 101, and a hooking portion 121 is provided at the other end of the locking member 12. The operating handle 14 passes through the adjustment groove 102 and is connected to the locking member 12. The adjustment groove 102 includes a first groove section 1021, a second groove section 1022, and a third groove section 1023 that are sequentially communicated. Moving the operating handle 14 along the first groove section 1021 and the third groove section 1023 can drive the locking member 12 to gradually move into or out of the activity cavity 101. Moving the operating handle 14 along the second groove section 1022 can drive the locking member 12 to rotate, so that the hooking portion 121 forms a first posture for hooking, or switches from the first posture to a second posture for unlocking the hooking function.
[0035] In this embodiment, the operating handle 14 can move along the first groove section 1021 to the second groove section 1022, the operating handle 14 can move along the second groove section 1022 to the third groove section 1023, and can move along the third groove section 1023; when the operating handle 14 moves along the first groove section 1021 and the third groove section 1023 in the direction close to the second groove section 1022, a part of the locking member 12 gradually moves out of the movable cavity 101, that is, the hooking portion 121 gradually moves away from the mounting cylinder 13; when the operating handle 14 moves along the first groove section 1021 and the third groove section 1023 in the direction away from the second groove section 1022, a part of the locking member 12 gradually moves into the movable cavity 101, that is, the hooking portion 121 gradually moves closer to the mounting cylinder 13.
[0036] Specifically, when the operating handle 14 moves from the first groove section 1021 to the second groove section 1022, a part of the locking member 12 gradually moves out of the movable cavity 101, and at this time, the hooking portion 121 is in the second posture; when the operating handle 14 stays at the junction of the first groove section 1021 and the second groove section 1022, the distance that the locking member 12 moves out of the movable cavity 101 is equal to the length of the first groove section 1021; when the operating handle 14 moves along the second groove section 1022 to the third groove section 1023, the operating handle 14 drives the locking member 12 to rotate a certain angle, for example, rotate 90°, and at this time, the hooking portion 121 is converted from the second posture to the first posture; when the locking member 12 moves along the third groove section 1023 from the junction of the second groove section 1022 and the third groove section 1023, a part of the locking member 12 gradually moves into the movable cavity 101, and at this time, the locking member 12 contracts to achieve the locking action, that is, the hooking portion 121 can hook the structural member (leg 30) to lock the structural member (leg 30).
[0037] In some embodiments, the outrigger lock 10 of the present application is used to lock the outriggers 30 of a construction machinery chassis. The operating handle 14 can move along the first groove section 1021 and the third groove section 1023 to drive the locking member 12 to extend or contract. When the operating handle 14 moves along the second groove section 1022, the locking member 12 rotates by a certain angle so that the hooking portion 121 forms a first posture for hooking, or switches from the first posture to a second posture for unlocking the hooking function. When the hooking portion 121 is in the first posture, the locking member 12 is driven by the operating handle 14 to contract until the hooking portion 121 hooks the outrigger 30. At this time, the hooking portion 121 can limit the rotation of the outrigger 30 to achieve the locking action of the outrigger 30. Since the locking form of the outrigger lock 10 is to lock the outrigger 30 by hooking the outrigger 30 and the telescopic movement of the locking member 12 can be used to adapt to outriggers of different lengths, the outrigger lock 10 can be adapted to different chassis, different vehicle models, different lower vehicle structures, and different outriggers. The position where the outrigger lock 10 is connected to the construction machinery chassis is fixed, the installation is convenient, and the versatility is strong. There is no need to repeatedly adjust the installation position because the telescopic movement of the locking member 12 can compensate for the installation error. Therefore, the outrigger lock 10 of the present application is convenient to use, has a stable working effect, good reliability, and the outrigger lock 10 has a simple structure, low manufacturing precision, and low cost.
[0038] Optionally, as Figure 1 and Figure 2 shown, the first groove section 1021 and the third groove section 1023 are parallel and oppositely arranged, and the second groove section 1022 is connected between the first groove section 1021 and the third groove section 1023. In this embodiment, the length direction of the second groove section 1022 is perpendicular to the length direction of the first groove section 1021 or the third groove section 1023; the first groove section 1021, the second groove section 1022, and the third groove section 1023 are combined into a U shape.
[0039] Optionally, as Figure 1 and Figure 2 shown, the first groove section 1021 and the third groove section 1023 are arranged along the axial direction of the mounting cylinder 13, and the second groove section 1022 is arranged along the circumferential direction of the mounting cylinder 13.
[0040] Optionally, as Figure 3As shown, two limiting plates 131 are fixed on the side wall of the installation cylinder 13. The two limiting plates 131 are respectively located on the opposite sides of the third groove section 1023 and are arranged along the length direction of the third groove section 1023. A plurality of through holes 103 are provided on each limiting plate 131; the leg lock 10 further includes a plug-in member 15 which can be inserted into the through holes 103 of the two limiting plates 131 to limit the operation handle 14; under the limiting action of the plug-in member 15, the locking member 12 will not undergo lateral displacement due to the centrifugal force during the turning process of the vehicle, which can ensure that the structural member (leg 30) will not be thrown out due to the centrifugal force during the turning process of the vehicle, and make the head of the locking member 12 closely fit with the structural member to ensure the stable and reliable leg lock 10. In this embodiment, the two limiting plates 131 are arranged in parallel and opposite to each other. The through holes 103 on the two limiting plates 131 are arranged in one-to-one correspondence, and the plurality of through holes 103 are spaced from each other along the axial direction of the installation cylinder 13; when the operation handle 14 drives the locking member 12 to contract and move along the third groove section 1023 so that the locking member 12 locks the end away from the installation cylinder 13 on the structural member (leg 30), the plug-in member 15 is inserted into the through hole 103 closest to the operation handle 14 so that a part of the operation handle 14 abuts against the plug-in member 15. At this time, the plug-in member 15 locks the position of the operation handle 14.
[0041] Optionally, as Figure 3 shown, the plug-in member 15 includes a first pin 151, a second pin 152 and an elastic spiral part 153. The first pin 151 and the second pin 152 are arranged opposite to each other, and both the first pin 151 and the second pin 152 are connected to the elastic spiral part 153; when the first pin 151 is inserted into the through holes 103 of the two limiting plates 131, the second pin 152 abuts against the edge of the limiting plate 131 by the elastic force of the elastic spiral part 153. When it is necessary to insert the plug-in member 15 into the through hole 103, first separate the first pin 151 and the second pin 152. At this time, the elastic spiral part 153 undergoes elastic deformation, and then insert the first pin 151 into the through holes 103 of the two limiting plates 131 and then release the second pin 152. At this time, the second pin 152 abuts against the edge of the limiting plate 131 by the elastic force of the elastic spiral part 153. This design can ensure that the plug-in member 15 will not fall off due to vibration after being installed on the limiting plate 131.
[0042] Optionally, when the elastic spiral part 153 does not undergo elastic deformation, the distance between the first pin 151 and the second pin 152 is smaller than the distance between the hole wall of the through hole 103 and the edge of the limiting plate 131.
[0043] Optionally, the installation cylinder 13 includes a cylinder body 132, a first cover plate 133 and a second cover plate 134 connected to both ends of the cylinder body 132. The first cover plate 133 is provided with a through hole 104 for the locking member 12 to extend out, and the second cover plate 134 is provided with an exhaust hole 105 for discharging the gas in the movable cavity 101. When the operating handle 14 moves along the first groove section 1021 or the third groove section 1023, the exhaust hole 105 can discharge the gas in the movable cavity 101.
[0044] Optionally, the cylinder body 132 is cylindrical, and the cross-section of the movable cavity 101 is circular; both the first cover plate 133 and the second cover plate 134 are circular.
[0045] Optionally, as Figure 4 shown, the locking member 12 includes a rod portion 122 and a piston portion 123. The piston portion 123 is arranged in the movable cavity 101. One end of the rod portion 122 is connected to the hooking portion 121, and the other end of the rod portion 122 passes through the through hole 104 and is connected to the piston portion 123; the leg lock 10 further includes a first elastic member 16. The first elastic member 16 is arranged in the movable cavity 101. One end of the first elastic member 16 abuts against the first cover plate 133, and the other end of the first elastic member 16 abuts against the piston portion 123. When the operating handle 14 is pulled by hand along the first groove section 1021 or the third groove section 1023 in the direction close to the second groove section 1022, the first elastic member 16 is gradually compressed; when the operating handle 14 is released, the first elastic member 16 drives the operating handle 14 to move along the first groove section 1021 or the third groove section 1023 in the direction away from the second groove section 1022 by its elastic force. In this embodiment, the hooking portion 121 is perpendicularly connected to the rod portion 122. For example, the hooking portion 121 and the rod portion 122 are combined into an L shape; the outer diameter of the rod portion 122 matches the inner diameter of the through hole 104, the outer diameter of the piston portion 123 matches the inner diameter of the movable cavity 101, and the outer diameter of the piston portion 123 is larger than the outer diameter of the rod portion 122.
[0046] Optionally, the first elastic member 16 is a spring.
[0047] Optionally, as Figure 1 shown, the leg lock 10 further includes a fixing plate 17. The fixing plate 17 is connected to the side wall of the installation cylinder 13, and a plurality of connection holes 106 are arranged on the fixing plate 17. In this embodiment, the fixing plate 17 is connected to the construction machinery chassis through the connection holes 106 in cooperation with bolts.
[0048] Optionally, when the operating handle 14 is in the first slot section 1021, the hooking portion 121 is arranged in the horizontal direction; when the operating handle 14 moves from the junction of the first slot section 1021 and the second slot section 1022 to the third slot section 1023, the hooking portion 121 rotates from the horizontal state (the second posture) to the vertical state (the first posture); when the operating handle 14 moves along the third slot section 1023 in the direction away from the second slot section 1022, the hooking portion 121 can be hooked on the structural member (the support leg 30) to achieve locking.
[0049] Second Embodiment
[0050] Figure 5 is a schematic cross-sectional structure diagram of the support leg lock according to the second embodiment of the present application. As Figure 5 shown, the support leg lock 10 of this embodiment is substantially the same as the support leg lock 10 of the first embodiment. The difference is that the support leg lock 10 includes a second elastic member 18, and the first elastic member 16 is not provided in the movable cavity 101.
[0051] Specifically, as Figure 5 shown, the second elastic member 18 is arranged in the movable cavity 101. One end of the second elastic member 18 is connected to the second cover plate 134, and the other end of the second elastic member 18 is connected to the piston portion 123; when the operating handle 14 moves along the first slot section 1021 or the third slot section 1023 to drive the locking member 12 to gradually move into or out of the movable cavity 101, the second elastic member 18 is gradually stretched. When the operating handle 14 is pulled along the first slot section 1021 in the direction close to the second slot section 1022, the second elastic member 18 is gradually compressed or stretched. At this time, the hooking portion 121 is in the horizontal state (the second posture); when the operating handle 14 moves along the second slot section 1022 to the third slot section 1023, the hooking portion 121 rotates from the horizontal state (the second posture) to the vertical state (the first posture); finally, the operating handle 14 is released, and the second elastic member 18 drives the operating handle 14 to move in the third slot section 1023 by its elastic force until the hooking portion 121 is locked on the structural member (the support leg 30) to achieve locking. In this embodiment, the second elastic member 18 is a tension spring.
[0052] The support leg lock 10 of the present application can rely on the elastic force of the second elastic member 18 to hook the hooking portion 121 on the structural member (the support leg 30). Under the action of the elastic force of the second elastic member 18, the locking member 12 will not undergo lateral displacement due to the centrifugal force during the turning process of the vehicle, which can ensure that the structural member (the support leg 30) will not be thrown out due to the centrifugal force during the turning process of the vehicle, and the head of the locking member 12 is tightly attached to the structural member to ensure the stable and reliable operation of the support leg lock 10.
[0053] The outrigger lock 10 of the present application may not be provided with the insertion member 15 and the limiting plate 131. Of course, in order to ensure the locking and positioning effect, the outrigger lock 10 may include the insertion member 15 and the limiting plate 131 of the first embodiment. For the specific structure and function, please refer to the first embodiment and will not be elaborated here.
[0054] Third Embodiment
[0055] Figure 6 FIG. is a schematic structural view of the outrigger lock of the construction machinery chassis according to the third embodiment of the present application when unlocking the outrigger. Figure 7 is Figure 6 a schematic side view structural view of the construction machinery chassis shown. Figure 8 is Figure 7 a schematic partial enlarged structural view of the construction machinery chassis shown. Figure 9 FIG. is a schematic structural view of the outrigger lock of the construction machinery chassis according to the third embodiment of the present application when locking the outrigger. Figure 10 is Figure 9 a schematic partial enlarged structural view of the construction machinery chassis shown. Please refer to Figures 6 to 10 , the present application also relates to a construction machinery chassis, including the above-mentioned outrigger lock 10.
[0056] Optionally, the construction machinery chassis is, for example, the chassis of a concrete pump truck, a fire truck, or a sanitation truck, but is not limited thereto.
[0057] Optionally, the construction machinery chassis further includes a subframe 20 and outriggers 30. An installation seat 21 is connected to the subframe 20. The end of the outrigger 30 is rotatably connected to the installation seat 21. The outrigger lock 10 is fixed to the subframe 20. Operating the operating handle 14 can drive the locking member 12 to lock or unlock the outrigger 30. The outrigger lock 10 of the present application is used to lock the outrigger 30 to prevent the outrigger 30 from deflecting during the vehicle turning process. In this embodiment, a screw hole matching the connection hole 106 is provided on the subframe 20, and the outrigger lock 10 is fixed to the subframe 20 through the cooperation of the connection hole 106 and the screw hole.
[0058] Optionally, the outrigger lock 10 is located below the outrigger 30, and the length direction of the outrigger lock 10 is perpendicular to the length direction of the outrigger 30; when the operating handle 14 is pulled along the first slot section 1021 to the second slot section 1022, the hooking portion 121 of the locking member 12 moves from below the outrigger 30 to the side of the outrigger 30, and at this time, the hooking portion 121 is in a horizontal state (second posture); when the operating handle 14 is pushed along the second slot section 1022 to the third slot section 1023, the hooking portion 121 rotates from the horizontal state (second posture) to the vertical state (first posture); then the operating handle 14 is released, and the first elastic member 16 or the second elastic member 18 drives the operating handle 14 to move in the third slot section 1023 by elastic force until the hooking portion 121 hooks the outrigger 30; finally, the plug-in member 15 is inserted into the through hole 103 of the limiting plate 131 to lock the operating handle 14.
[0059] The outrigger lock 10 of the construction machinery chassis of the present application can be adapted to different chassis, different vehicle models, different lower vehicle structures, and different outriggers 30. The installation position of the outrigger lock 10 is fixed, and there will be no problems such as structural redundancy, increased cost, unbeautiful appearance, and stress concentration at the welding point. Moreover, there will be no problem of the outrigger 30 locking failure caused by incorrect installation and matching.
[0060] The above embodiments are only illustrative of the principles and effects of the present application, and are not used to limit the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present application should still be covered by the claims of the present application.
Claims
1. A leg lock, characterized in that: The invention comprises a locking member (12), a mounting tube (13) and an operating handle (14); an active cavity (101) is arranged in the mounting tube (13); an adjusting groove (102) communicating with the active cavity (101) is arranged on a side wall of the mounting tube (13); one end of the locking member (12) is mounted in the active cavity (101); the other end of the locking member (12) is provided with a hooking portion (121); the operating handle (14) passes through the adjusting groove (102) and is connected to the locking member (12); the adjusting groove (102) comprises a first adjusting groove (102) and a second adjusting groove (102) connected in sequence to the first adjusting groove (102); The invention relates to a first slot section (1021), a second slot section (1022) and a third slot section (1023); the operating handle (14) moves along the first slot section (1021) and the third slot section (1023) to drive the locking member (12) to gradually move into or out of the active cavity (101); the operating handle (14) moves along the second slot section (1022) to drive the locking member (12) to rotate, so that the hooking portion (121) forms a first posture of hooking action, or switches from the first posture to a second posture of unlocking the hooking action.
2. The leg lock according to claim 1, characterized in that: The first groove section (1021) and the third groove section (1023) are both arranged along the axial direction of the mounting tube (13), and the second groove section (1022) is arranged along the circumferential direction of the mounting tube (13).
3. The leg lock according to claim 1, characterized in that: Two limiting plates (131) are fixed to the side wall of the mounting tube (13), the two limiting plates (131) are respectively located on opposite sides of the third slot section (1023) and are arranged along the length direction of the third slot section (1023), and each limiting plate (131) is provided with a plurality of through holes (103); the leg lock also includes a plug-in connector (15), the plug-in connector (15) can be inserted into the through holes (103) of the two limiting plates (131) to limit the operating handle (14).
4. The leg lock according to claim 3, characterized in that: The plug connector (15) comprises a first plug pin (151), a second plug pin (152) and an elastic spiral portion (153); the first plug pin (151) and the second plug pin (152) are arranged opposite to each other, and the first plug pin (151) and the second plug pin (152) are both connected to the elastic spiral portion (153); when the first plug pin (151) is inserted into the through holes (103) of the two limiting plates (131), the second plug pin (152) is pressed against the edge of the limiting plate (131) by the elastic force of the elastic spiral portion (153).
5. The leg lock according to any one of claims 1 to 4, characterized in that: The mounting cylinder (13) comprises a cylinder body (132) and a first cover plate (133) and a second cover plate (134) connected to both ends of the cylinder body (132); the first cover plate (133) is provided with a through hole (104) for the locking member (12) to extend out; and the second cover plate (134) is provided with an exhaust hole (105) for exhausting gas from the active chamber (101).
6. The leg lock according to claim 5, characterized in that: The locking member (12) comprises a rod portion (122) and a piston portion (123), wherein the piston portion (123) is arranged in the movable cavity (101), one end of the rod portion (122) is connected to the hook portion (121), and the other end of the rod portion (122) passes through the through hole (104) and is connected to the piston portion (123); the leg lock also comprises a first elastic member (16), wherein the first elastic member (16) is arranged in the movable cavity (101), one end of the first elastic member (16) abuts against the first cover plate (133), and the other end of the first elastic member (16) abuts against the piston portion (123).
7. The leg lock according to claim 5, characterized in that: The locking member (12) comprises a rod portion (122) and a piston portion (123), wherein the piston portion (123) is arranged in the movable cavity (101), one end of the rod portion (122) is connected to the hook portion (121), and the other end of the rod portion (122) passes through the through hole (104) and is connected to the piston portion (123); the leg lock also comprises a second elastic member (18), wherein the second elastic member (18) is arranged in the movable cavity (101), one end of the second elastic member (18) is connected to the second cover plate (134), and the other end of the second elastic member (18) is connected to the piston portion (123); when the operating handle (14) moves along the first slot section (1021) or the third slot section (1023) to drive the locking member (12) to gradually move into or out of the movable cavity (101), the second elastic member (18) is gradually compressed or stretched.
8. The leg lock according to any one of claims 1 to 4, characterized in that: The leg lock further comprises a fixing plate (17), wherein the fixing plate (17) is connected to the side wall of the mounting tube (13), and a plurality of connecting holes (106) are arranged on the fixing plate (17).
9. An engineering machinery chassis, characterized in that: The invention comprises the leg lock as claimed in any one of claims 1 to 8.
10. The construction machinery chassis according to claim 9, characterized in that: The engineering machinery chassis further comprises a subframe (20) and a support leg (30); the subframe (20) is connected to a mounting seat (21); an end of the support leg (30) is rotatably connected to the mounting seat (21); the support leg lock is fixed to the subframe (20); and operating the operating handle (14) can drive the locking member (12) to lock or unlock the support leg (30).