Supporting leg interlocking control device and engineering machinery

Abstract

The invention discloses a landing leg interlocking control device and an engineering machine. The device comprises horizontal / vertical switching main handles arranged on the left side of the engineering machine and horizontal / vertical switching auxiliary handles arranged on the right side of the engineering machine. The right front horizontal / vertical switching main handle and the right rear horizontal / vertical switching main handle are connected with the landing leg valve group through a first self-locking mechanism; the left front horizontal / vertical switching auxiliary handle and the left rear horizontal / vertical switching auxiliary handle are connected with the supporting leg valve set through a second self-locking mechanism. The first self-locking mechanism is used for enabling the right horizontal supporting leg not to act when the right horizontal supporting leg is operated on the left side; the second self-locking mechanism is used for enabling the left horizontal supporting leg not to act when the left horizontal supporting leg is operated on the right side. On the basis of not changing the operation habits of clients and the integrated design of the landing leg valve, the left and right interlocking function when the horizontal oil cylinders of the landing legs fail in one-way operation reversing and different-side operation reversing is achieved, meanwhile, synchronous stretching and retracting of the vertical oil cylinders are not affected, the operation safety of the landing legs is improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering machinery, and in particular relates to an outrigger interlocking operating device and engineering machinery. Background Art

[0002] As a special engineering vehicle, a crane must not only meet the requirements of road vehicle driving, but also have the function of lifting operations. When performing the operation of getting on the vehicle, the outriggers must be extended first, and the extension and retraction of the outriggers is controlled by the outrigger hydraulic system. The outrigger control devices of the wheeled crane / truck-mounted crane are located on both sides of the vehicle, and the operator can operate them on both sides of the crane: that is, the operator can operate the extension and retraction of the left outrigger on the left side of the crane, and the right outrigger on the right side of the crane. Similarly, the extension and retraction of the left outrigger can also be operated on the right side of the crane. In this way, due to the visual blind spot, the operator on one side of the crane cannot observe the actual position of the movable outrigger on the other side, which poses a great safety hazard.

[0003] In order to solve this safety hazard, the existing technology mainly adopts the electric control leg operation mode, the control mode of adding solenoid valves in the control circuit, and the mode of adding handle locking mechanism. The core control components of the electric control leg operation mode are the electric control valve group and the electric control leg operation panel. The electric control leg panel can output electrical signals with logic control to control the leg valve group to switch the hydraulic oil circuit, thereby controlling the leg extension and retraction action; the leg control panel can control the vertical extension and retraction of all legs, and can only control the extension and retraction function of the horizontal leg on the corresponding side. However, the electric control leg operation mode is expensive and lacks market competitiveness. The control mode of adding solenoid valves in the control circuit can reduce the cost of the electric control leg operation system by half, but the cost is still about 2 times higher than that of mechanical leg operation, and the control switch needs to be pressed at the same time when performing the extension and retraction of the unilateral movable leg, which changes the customer's operation habits and increases the difficulty of operation. The mode of adding a handle locking mechanism not only realizes the unilateral operation of the horizontal leg, but also limits the unilateral operation of the vertical leg. After the unilateral vertical leg is lifted off the ground, the support of the vertical leg on the other side greatly increases the risk of vehicle tipping during the vehicle support process. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides an outrigger interlocking control device and engineering machinery, which realize the one-way operation switching of the outrigger horizontal cylinder and the left-right interlocking function of the opposite-side operation switching failure on the basis of not changing the customer's operating habits and the integrated design of the outrigger valve, while not affecting the synchronous extension and retraction of the vertical cylinder, thereby greatly improving the safety of the outrigger operation, reducing the production cost and improving the market competitiveness.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: In a first aspect, an outrigger interlocking control device is provided, comprising: a right front horizontal / vertical switching main handle, a left front horizontal / vertical switching main handle, a right rear horizontal / vertical switching main handle, and a left rear horizontal / vertical switching main handle, which are arranged at a set position on the left side of the engineering machinery; a right front horizontal / vertical switching sub-handle, a left front horizontal / vertical switching sub-handle, a right rear horizontal / vertical switching sub-handle, and a left rear horizontal / vertical switching sub-handle, which are arranged at a set position on the right side of the engineering machinery; wherein the left front horizontal / vertical switching main handle and the left rear horizontal / vertical switching main handle are connected to the outrigger valve group by a first transmission mechanism; the right front horizontal / vertical switching sub-handle and the right rear horizontal / vertical switching sub-handle are connected to the outrigger valve group by a second transmission mechanism The leg valve group is connected by transmission; the right front horizontal / vertical switching main handle and the right rear horizontal / vertical switching main handle are connected by transmission with the leg valve group by a first self-locking mechanism; the left front horizontal / vertical switching sub-handle and the left rear horizontal / vertical switching sub-handle are connected by transmission with the leg valve group by a second self-locking mechanism; the first self-locking mechanism is used for preventing the right front horizontal outrigger or the right rear horizontal outrigger from moving when the right front horizontal / vertical switching main handle or the right rear horizontal / vertical switching main handle is switched to a horizontal position on the left side of the engineering machinery; the second self-locking mechanism is used for preventing the left front horizontal outrigger or the left rear horizontal outrigger from moving when the left front horizontal / vertical switching sub-handle or the left rear horizontal / vertical switching sub-handle is switched to a horizontal position on the right side of the engineering machinery.

[0006] Further, the leg valve group includes a right front horizontal / vertical leg selection link, a left front horizontal / vertical leg selection link, a right rear horizontal / vertical leg selection link and a left rear horizontal / vertical leg selection link; wherein, the right front horizontal / vertical switching main handle and the right front horizontal / vertical switching sub-handle are respectively transmission connected to the two ends of the valve stem of the right front horizontal / vertical leg selection link; the left front horizontal / vertical switching main handle and the left front horizontal / vertical switching sub-handle are respectively transmission connected to the two ends of the valve stem of the left front horizontal / vertical leg selection link; the right rear horizontal / vertical switching main handle and the right rear horizontal / vertical switching sub-handle are respectively transmission connected to the two ends of the valve stem of the right rear horizontal / vertical leg selection link; the left rear horizontal / vertical switching main handle and the left rear horizontal / vertical switching sub-handle are respectively transmission connected to the two ends of the valve stem of the left rear horizontal / vertical leg selection link.

[0007] Further, the first transmission mechanism includes: a main handle fork 1, one end of the main handle fork 1 is transmission connected to the main handle 1, and the other end of the main handle fork 1 is transmission connected to one end of a valve stem 1; when the main handle 1 is the left front horizontal / vertical switching main handle, the valve stem 1 is the valve stem for selecting the left front horizontal / vertical support leg; when the main handle 1 is the left rear horizontal / vertical switching main handle, the valve stem 1 is the valve stem for selecting the left rear horizontal / vertical support leg.

[0008] Further, the second self-locking mechanism includes: a pull rod connecting plate, one end of the pull rod connecting plate is transmission-connected with a sub-handle 1, the other end of the pull rod connecting plate is connected to one end of a T-type pull rod, the other end of the T-type pull rod is matched with a threaded bushing with an axial clearance, the threaded bushing is threadedly connected to one end of a main and sub-connecting pull rods, the other end of the main and sub-connecting pull rods is connected to one end of a sub-operating pull rod connecting shaft through a leg valve connecting bolt, and the other end of the sub-operating pull rod connecting shaft is transmission-connected to the other end of a valve stem 1 through a ball reversing mechanism; a preload spring 1 is provided between the T-type pull rod and the main and sub-connecting pull rods, and the initial position of the T-type pull rod is that the left side boss of the T-type pull rod is fitted together with the left side of the threaded bushing; when the sub-handle 1 is the left front horizontal / vertical switching sub-handle, the valve stem 1 is the valve stem selected for the left front horizontal / vertical leg; when the sub-handle 1 is the left rear horizontal / vertical switching sub-handle, the valve stem 1 is the valve stem selected for the left rear horizontal / vertical leg.

[0009] Furthermore, if the auxiliary handle 1 is operated downward, the pull rod connecting plate moves to the right, thereby driving the T-type pull rod, threaded bushing, main and auxiliary connecting rods, and support leg valve connecting bolts to move to the right, thereby driving the valve stem 1 to move to the right. At this time, the left front vertical cylinder or the left rear vertical cylinder retracts and contracts normally; if the auxiliary handle 1 is operated upward, the pull rod connecting plate drives the T-type pull rod to move to the left, and the T-type pull rod compresses the preload spring 1 to the left. Since the compression force of the preload spring 1 is always smaller than the spring preload force of the ball reversing mechanism on the right side of the valve stem 1, the valve stem 1 does not move, and the left front horizontal cylinder or the left rear horizontal cylinder does not move.

[0010] Further, the second transmission mechanism includes: a secondary pull rod, one end of which is transmission-connected to the secondary handle 2, and the other end of which is transmission-connected to one end of the valve stem 2 via a leg valve connecting bolt; when the secondary handle 2 is the right front horizontal / vertical switching secondary handle, the valve stem 2 is the valve stem for selecting the right front horizontal / vertical leg; when the secondary handle 2 is the right rear horizontal / vertical switching secondary handle, the valve stem 2 is the valve stem for selecting the right rear horizontal / vertical leg.

[0011] Further, the second self-locking mechanism includes: a main handle fork 2, one end of the main handle fork 2 is transmission-connected to the main handle 2, the other end of the main handle fork 2 is transmission-connected to one end of the transition mechanism, the other end of the transition mechanism is connected to one end of a T-type connecting rod, the other end of the T-type connecting rod is clearance-matched with a threaded bushing 1, the threaded bushing 1 is threadedly connected to one end of a valve stem 2, a preload spring 2 is provided between the T-type connecting rod and the valve stem 2; the other end of the valve stem 2 is connected to one end of a secondary rod connecting shaft, and a preload spring 3 is sleeved on the secondary rod connecting shaft; when the main handle 2 is the right front horizontal / vertical switching main handle, the valve stem 2 is the valve stem for selecting the right front horizontal / vertical support leg; when the main handle 2 is the right rear horizontal / vertical switching main handle, the valve stem 2 is the valve stem for selecting the right rear horizontal / vertical support leg.

[0012] Furthermore, if the main handle two is operated downward, the main handle fork two drives the transition mechanism, the T-type connecting rod, the threaded bushing one, and the valve stem two to move to the left. At this time, the right front vertical cylinder or the right rear vertical cylinder retracts and contracts normally; if the main handle two is operated upward, the main handle fork two drives the transition mechanism and the T-type connecting rod to move to the right, and the T-type connecting rod compresses the preload spring two. Since the compression force of the preload spring two is always set smaller than the preload force of the preload spring three, the valve stem two does not move, and the right front horizontal cylinder or the right rear horizontal cylinder does not move.

[0013] Furthermore, the outrigger valve group also includes a telescopic switching main handle, a telescopic switching sub-handle, a fifth outrigger main handle and a fifth outrigger sub-handle.

[0014] In a second aspect, a construction machine is provided, wherein the construction machine is equipped with the outrigger interlocking control device described in the first aspect.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention uses the first self-locking mechanism to drive and connect the right front horizontal / vertical switching main handle and the right rear horizontal / vertical switching main handle with the outrigger valve group; the left front horizontal / vertical switching sub-handle and the left rear horizontal / vertical switching sub-handle use the second self-locking mechanism to drive and connect the outrigger valve group; the first self-locking mechanism is used for operating the right front horizontal / vertical switching main handle or the right rear horizontal / vertical switching main handle to switch to the horizontal position on the left side of the engineering machinery, and the right front horizontal outrigger or the right rear horizontal outrigger does not move; the second self-locking mechanism is used for operating the left front horizontal / vertical switching sub-handle or the left rear horizontal / vertical switching sub-handle to switch to the horizontal position on the right side of the engineering machinery, and the left front horizontal outrigger or the left rear horizontal outrigger does not move. The present invention realizes the left-right interlocking function of the outrigger horizontal oil cylinder's single-direction operation reversing and the opposite-side operation reversing failure on the basis of not changing the customer's operating habits and the integrated design of the outrigger valve, and does not affect the synchronous extension and retraction of the vertical oil cylinder, which greatly improves the safety of the outrigger operation, reduces the manufacturing cost, and improves the market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a top view of a leg interlocking operating device provided by an embodiment of the present invention; Figure 2 The first transmission mechanism ( Figure 1 BB section in FIG. 1 ); Figure 3 It is a second self-locking mechanism ( Figure 1 Schematic diagram of the principle of the DD section in FIG. Figure 4 The first self-locking mechanism ( Figure 1 Schematic diagram of the principle of AA section in FIG. Figure 5 The second transmission mechanism ( Figure 1 Schematic diagram of the CC section in FIG. In the figure: 1, telescopic switching main handle; 1a, telescopic switching sub-handle; 2, fifth leg main handle; 2a, fifth leg sub-handle; 3, right front horizontal / vertical switching main handle; 3a, right front horizontal / vertical switching sub-handle; 4, left front horizontal / vertical switching main handle; 4a, left front horizontal / vertical switching sub-handle; 5, right rear horizontal / vertical switching main handle; 5a, right rear horizontal / vertical switching sub-handle; 6, left rear horizontal / vertical switching main handle; 6a, left rear horizontal / vertical switching sub-handle; 20, leg valve group; 201, main handle fork 1; 202, valve stem 1; 203, valve body 1; 204, roller Ball reversing mechanism; 205, auxiliary operating rod connecting shaft; 301, main handle fork two; 302, valve stem two; 303, valve body two; 305, auxiliary rod connecting shaft; 306, transition mechanism; 307, T-type connecting rod; 308, threaded bushing one; 309, preload spring two; 310, preload spring three; 401, auxiliary tie rod; 501, tie rod connecting plate; 502, T-type tie rod; 503, main and auxiliary connecting tie rods; 504, preload spring one; 505, threaded bushing; 506, outrigger valve connecting bolt; 60, outrigger valve group bracket; 701, auxiliary operating bracket; 702, rotating pin shaft; 703, connecting pin. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] Embodiment 1 like Figure 1~Figure 5 As shown, a leg interlocking control device includes: a telescopic switching main handle 1, a fifth leg main handle 2, a right front horizontal / vertical switching main handle 3, a left front horizontal / vertical switching main handle 4, a right rear horizontal / vertical switching main handle 5, and a left rear horizontal / vertical switching main handle 6, which are arranged at a set position on the left side of the engineering machinery; a telescopic switching sub-handle 1a, a fifth leg sub-handle 2a, a right front horizontal / vertical switching sub-handle 3a, a left front horizontal / vertical switching sub-handle 4a, a right rear horizontal / vertical switching sub-handle 5a, and a left rear horizontal / vertical switching sub-handle 6a, which are arranged at a set position on the right side of the engineering machinery.

[0019] Among them, the left front horizontal / vertical switching main handle 4 and the left rear horizontal / vertical switching main handle 6 are connected to the outrigger valve group 20 by a first transmission mechanism; the right front horizontal / vertical switching sub-handle 3a and the right rear horizontal / vertical switching sub-handle 5a are connected to the outrigger valve group 20 by a second transmission mechanism; the right front horizontal / vertical switching main handle 3 and the right rear horizontal / vertical switching main handle 5 are connected to the outrigger valve group 20 by a first self-locking mechanism; the left front horizontal / vertical switching sub-handle 4a and the left rear horizontal / vertical switching sub-handle 6a are connected to the outrigger valve group 20 by a second self-locking mechanism; the first self-locking mechanism is used for when the right front horizontal / vertical switching main handle 3 or the right rear horizontal / vertical switching main handle 5 is operated on the left side of the engineering machinery to switch to a horizontal position, the right front horizontal outrigger or the right rear horizontal outrigger does not move; the second self-locking mechanism is used for when the left front horizontal / vertical switching sub-handle 4a or the left rear horizontal / vertical switching sub-handle 6a is operated on the right side of the engineering machinery to switch to a horizontal position, the left front horizontal outrigger or the left rear horizontal outrigger does not move.

[0020] The outrigger valve assembly 20 is installed at a set position of the engineering machine through an outrigger valve assembly bracket 60. Each auxiliary handle is installed at a set position of the engineering machine through an auxiliary operating bracket 701.

[0021] The leg valve group 20 includes a right front horizontal / vertical leg selection link, a left front horizontal / vertical leg selection link, a right rear horizontal / vertical leg selection link and a left rear horizontal / vertical leg selection link; wherein, the right front horizontal / vertical switching main handle 3 and the right front horizontal / vertical switching sub-handle 3a are respectively transmission connected to the two ends of the valve stem of the right front horizontal / vertical leg selection link; the left front horizontal / vertical switching main handle 4 and the left front horizontal / vertical switching sub-handle 4a are respectively transmission connected to the two ends of the valve stem of the left front horizontal / vertical leg selection link; the right rear horizontal / vertical switching main handle 5 and the right rear horizontal / vertical switching sub-handle 5a are respectively transmission connected to the two ends of the valve stem of the right rear horizontal / vertical leg selection link; the left rear horizontal / vertical switching main handle 6 and the left rear horizontal / vertical switching sub-handle 6a are respectively transmission connected to the two ends of the valve stem of the left rear horizontal / vertical leg selection link.

[0022] The telescopic switching main handle 1 and the telescopic switching sub-handle 1a have three state positions: upper position - leg retraction, middle position - closed state, lower position - leg extension; the fifth leg main handle 2 and the fifth leg sub-handle 2a have two state positions: middle position - closed state, lower position - vertical state; the right front horizontal / vertical switching main handle 3, the left front horizontal / vertical switching main handle 4, the right rear horizontal / vertical switching main handle 5, the left rear horizontal / vertical switching main handle 6, the right front horizontal / vertical switching sub-handle 3a, the left front horizontal / vertical switching sub-handle 4a, the right rear horizontal / vertical switching sub-handle 5a, and the left rear horizontal / vertical switching sub-handle 6a all have three state positions: upper position - horizontal state, middle position - closed position, and lower position - vertical state; in summary, the main handles 3 to 6 all control the movement in two directions, namely the vertical leg and the horizontal leg. In the prior art, the movement of the main operating handle will drive the follow-up movement of the sub-operating handle, thereby realizing that the operation of the handles on both sides can realize the valve stem movement of the leg valve group 20.

[0023] In order to realize the one-way operation switching of the horizontal oil cylinder of the outrigger and the left-right interlocking function of the opposite-side operation switching failure without changing the operation habits of the customers and the integrated design of the outrigger valve, and at the same time not affecting the synchronous extension and retraction of the vertical oil cylinder, the present invention is specifically described by taking the right front horizontal / vertical switching main handle 3 and the right front horizontal / vertical switching auxiliary handle 3a controlling the right front horizontal / vertical outrigger selection link, the left front horizontal / vertical switching main handle 4 and the left front horizontal / vertical switching auxiliary handle 4a controlling the left front horizontal / vertical outrigger selection link, the right rear horizontal / vertical switching main handle 5 and the right rear horizontal / vertical switching auxiliary handle 5a controlling the right rear horizontal / vertical outrigger selection link, and the left rear horizontal / vertical switching main handle 6 and the left rear horizontal / vertical switching auxiliary handle 6a controlling the left rear horizontal / vertical outrigger selection link as examples.

[0024] To ensure that the movable outrigger can only be operated from one side, the right front horizontal / vertical switching main handle 3 and the right rear horizontal / vertical switching main handle 5 on the left side of the vehicle cannot control the right front horizontal oil cylinder and the right rear horizontal oil cylinder, while the left front horizontal / vertical switching main handle 4 and the left rear horizontal / vertical switching main handle 6 can normally control the left front and left rear horizontal oil cylinders. The left front horizontal / vertical switching sub-handle 4a and the left rear horizontal / vertical switching sub-handle 6a cannot control the left front horizontal oil cylinder and the left rear horizontal oil cylinder, while the right front horizontal / vertical switching sub-handle 3a and the right rear horizontal / vertical switching sub-handle 5a can normally control the right front and right rear horizontal oil cylinders. In order to ensure the synchronous extension and retraction of the vertical outriggers and avoid the vehicle tipping over during the outrigger process, the right front horizontal / vertical switching main handle 3, the left front horizontal / vertical switching main handle 4, the right rear horizontal / vertical switching main handle 5, the left rear horizontal / vertical switching main handle 6, the right front horizontal / vertical switching auxiliary handle 3a, the left front horizontal / vertical switching auxiliary handle 4a, the right rear horizontal / vertical switching auxiliary handle 5a, and the left rear horizontal / vertical switching auxiliary handle 6a can all normally control the extension and retraction of the vertical outriggers. To achieve this function, the left front horizontal / vertical switching main handle 4 and the left rear horizontal / vertical switching main handle 6 use a first transmission mechanism to connect with the outrigger valve group 20 to control the extension and retraction of the left horizontal / vertical outriggers, such as Figure 2 The right front horizontal / vertical switching sub-handle 3a and the right rear horizontal / vertical switching sub-handle 5a are connected to the leg valve group 20 by a second transmission mechanism to control the extension and retraction of the right horizontal / vertical leg, as shown in FIG. Figure 5 shown.

[0025] like Figure 2 As shown, the first transmission mechanism includes a main handle fork 201, one end of the main handle fork 201 is transmission connected to the main handle, and the other end of the main handle fork 201 is transmission connected to one end of the valve stem 202.

[0026] When the main handle 1 is the left front horizontal / vertical switching main handle 4, the valve stem 1 202 is the valve stem for selecting the left front horizontal / vertical support leg; when the main handle 1 is the left rear horizontal / vertical switching main handle 6, the valve stem 1 202 is the valve stem for selecting the left rear horizontal / vertical support leg.

[0027] If the main handle 1 is operated upward, the main handle fork 1 201 drives the valve stem 1 202 to move rightward, and the left front horizontal cylinder or the left rear horizontal cylinder is actuated. If the main handle 1 is operated downward, the main handle fork 1 201 drives the valve stem 1 202 to move leftward, and the left front vertical cylinder or the left rear vertical cylinder is actuated.

[0028] like Figure 4As shown, the second self-locking mechanism includes a pull rod connecting plate 501, one end of the pull rod connecting plate 501 is transmission connected to the auxiliary handle, the other end of the pull rod connecting plate 501 is connected to one end of the T-type pull rod 502, the other end of the T-type pull rod 502 is matched with the threaded bushing 505 with axial clearance, the threaded bushing 505 is threadedly connected to one end of the main and auxiliary connecting rods 503, the other end of the main and auxiliary connecting rods 503 is connected to one end of the auxiliary operating pull rod connecting shaft 205 through the support leg valve connecting bolt 506, and the other end of the auxiliary operating pull rod connecting shaft 205 is transmission connected to the other end of the valve stem 202 through the ball reversing mechanism 204; a preload spring 504 is arranged between the T-type pull rod 502 and the main and auxiliary connecting rods 503, and the initial position of the T-type pull rod 502 is that the left side boss of the T-type pull rod 502 is in contact with the left side of the threaded bushing 505.

[0029] The pull rod connecting plate 501 is hinged to the auxiliary handle 1 through a connecting pin 703 , and the auxiliary handle 1 is hinged to the auxiliary operating bracket 701 through a rotating pin shaft 702 .

[0030] When the sub-handle 1 is the left front horizontal / vertical switching sub-handle 4a, the valve stem 1 202 is the valve stem for selecting the left front horizontal / vertical support leg; when the sub-handle 1 is the left rear horizontal / vertical switching sub-handle 6a, the valve stem 1 202 is the valve stem for selecting the left rear horizontal / vertical support leg.

[0031] If the auxiliary handle 1 is operated downward, the auxiliary handle 1 rotates clockwise around the rotating pin 702, and the pull rod connecting plate 501 moves to the right, thereby driving the T-type pull rod 502, the threaded bushing 505, the main and auxiliary connecting pull rods 503, and the support leg valve connecting bolt 506 to move to the right, thereby driving the valve stem 202 to move to the right. At this time, the left front vertical cylinder or the left rear vertical cylinder retracts and contracts normally; if the auxiliary handle 1 is operated upward, the auxiliary handle 1 rotates counterclockwise around the rotating pin 702, and the pull rod connecting plate 501 drives the T-type pull rod 502 to move to the left. Since the T-type pull rod 502 and the threaded bushing 505 are matched with axial clearance, the T-type pull rod 502 compresses the preload spring 1 504 to the left. Since the compression force of the preload spring 1 504 is always smaller than the spring preload force of the ball reversing mechanism 204 on the right side of the valve stem 202, the valve stem 202 does not move, and the left front horizontal cylinder or the left rear horizontal cylinder does not move, thereby achieving the opposite-side operation locking function.

[0032] like Figure 5 As shown, the second transmission mechanism includes: an auxiliary pull rod 401, one end of which is transmission connected to the auxiliary handle 2, and the other end of the auxiliary pull rod 401 is transmission connected to one end of the valve stem 2 302 through the leg valve connecting bolt 506.

[0033] When the auxiliary handle 2 is the right front horizontal / vertical switching auxiliary handle 3a, the valve stem 2 302 is the valve stem for selecting the right front horizontal / vertical support leg; when the auxiliary handle 2 is the right rear horizontal / vertical switching auxiliary handle 5a, the valve stem 2 302 is the valve stem for selecting the right rear horizontal / vertical support leg.

[0034] If the auxiliary handle 2 is operated upward, the auxiliary pull rod 401 drives the valve stem 2 302 to move rightward, and the right front horizontal cylinder or the right rear horizontal cylinder is actuated. If the auxiliary handle 2 is operated downward, the auxiliary pull rod 401 drives the valve stem 2 302 to move leftward, and the right front vertical cylinder or the right rear vertical cylinder is actuated.

[0035] like Figure 3 As shown, the second self-locking mechanism includes a main handle fork 2 301, one end of the main handle fork 2 301 is transmission connected to the main handle 2, the other end of the main handle fork 2 301 is transmission connected to one end of a transition mechanism 306, the other end of the transition mechanism 306 is connected to one end of a T-type connecting rod 307, the other end of the T-type connecting rod 307 is clearance-matched with a threaded bushing 1 308, the threaded bushing 1 308 is threadedly connected to one end of a valve stem 2 302, a preload spring 2 309 is provided between the T-type connecting rod 307 and the valve stem 2 302; the other end of the valve stem 2 302 is connected to one end of a secondary rod connecting shaft 305, and a preload spring 310 is sleeved on the secondary rod connecting shaft 305.

[0036] When the main handle 2 is the right front horizontal / vertical switching main handle 3, the valve stem 2 302 is the valve stem for selecting the right front horizontal / vertical support leg; when the main handle 2 is the right rear horizontal / vertical switching main handle 5, the valve stem 2 302 is the valve stem for selecting the right rear horizontal / vertical support leg.

[0037] If the main handle 2 is operated downward, the main handle fork 2 301 drives the transition mechanism 306, the T-type connecting rod 307, the threaded bushing 1 308, and the valve stem 2 302 to move to the left. At this time, the right front vertical cylinder or the right rear vertical cylinder can be extended and retracted normally; if the main handle 2 is operated upward, the main handle fork 2 301 drives the transition mechanism 306 and the T-type connecting rod 307 to move to the right, and the T-type connecting rod 307 compresses the preload spring 2 309. Since the compression force of the preload spring 2 309 is always set to be less than the preload force of the preload spring 310, the valve stem 2 302 does not move with it, and the right front horizontal cylinder or the right rear horizontal cylinder does not move, and the extension and retraction control of the right front horizontal cylinder or the right rear horizontal cylinder cannot be achieved, so the locking function of the opposite-side operation is realized.

[0038] The present invention realizes the non-following of the valve stem of the movable outrigger operated on the opposite side through the innovative design of the first self-locking mechanism and the second self-locking mechanism, thereby achieving the left-right interlocking function. At the same time, it does not affect the following movement of the vertical selection valve stem, realizes the synchronous extension and retraction of the vertical cylinder, and avoids the risk of vehicle overturning caused by the support of the vertical outrigger on the other side after the vertical outrigger on one side is lifted off the ground, greatly improving the safety of the outrigger operation and meeting the requirements of the market and current standards of various countries.

[0039] Without changing the customer's operating habits and the integrated design of the outrigger valve group, the present invention reduces the cost by 80% compared with the existing industry's electric outrigger operating method, and reduces the cost by 40% compared with the control method of adding a solenoid valve in the control loop. It has higher reliability and greatly improves the product's market competitiveness.

[0040] Embodiment 2 Based on the outrigger interlocking control device described in the first embodiment, this embodiment provides an engineering machine, wherein the engineering machine is equipped with the outrigger interlocking control device described in the first embodiment.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A leg interlocking control device, characterized in that: include: A right front horizontal / vertical switching main handle (3), a left front horizontal / vertical switching main handle (4), a right rear horizontal / vertical switching main handle (5), and a left rear horizontal / vertical switching main handle (6) are arranged at a set position on the left side of the engineering machinery; A right front horizontal / vertical switching sub-handle (3a), a left front horizontal / vertical switching sub-handle (4a), a right rear horizontal / vertical switching sub-handle (5a), and a left rear horizontal / vertical switching sub-handle (6a) are arranged at a set position on the right side of the engineering machinery; Wherein, the left front horizontal / vertical switching main handle (4) and the left rear horizontal / vertical switching main handle (6) are transmission-connected to the outrigger valve group (20) by means of a first transmission mechanism; The right front horizontal / vertical switching sub-handle (3a) and the right rear horizontal / vertical switching sub-handle (5a) are transmission-connected to the outrigger valve assembly (20) using a second transmission mechanism; The right front horizontal / vertical switching main handle (3) and the right rear horizontal / vertical switching main handle (5) are transmission-connected to the outrigger valve assembly (20) by means of a first self-locking mechanism; The left front horizontal / vertical switching sub-handle (4a) and the left rear horizontal / vertical switching sub-handle (6a) are transmission-connected to the outrigger valve assembly (20) using a second self-locking mechanism; The first self-locking mechanism is used to prevent the right front horizontal outrigger or the right rear horizontal outrigger from moving when the right front horizontal / vertical switching main handle (3) or the right rear horizontal / vertical switching main handle (5) is operated on the left side of the engineering machine to switch to a horizontal position; The second self-locking mechanism is used to prevent the left front horizontal support leg or the left rear horizontal support leg from moving when the left front horizontal / vertical switching auxiliary handle (4a) or the left rear horizontal / vertical switching auxiliary handle (6a) is manipulated on the right side of the engineering machine to switch to a horizontal position.

2. The outrigger interlocking operating device according to claim 1, characterized in that: The outrigger valve group (20) comprises a right front horizontal / vertical outrigger selection link, a left front horizontal / vertical outrigger selection link, a right rear horizontal / vertical outrigger selection link, and a left rear horizontal / vertical outrigger selection link; Wherein, the right front horizontal / vertical switching main handle (3) and the right front horizontal / vertical switching auxiliary handle (3a) are respectively connected to the two ends of the valve stem of the right front horizontal / vertical leg selection link in a transmission manner; The left front horizontal / vertical switching main handle (4) and the left front horizontal / vertical switching auxiliary handle (4a) are respectively connected to the two ends of the valve stem of the left front horizontal / vertical leg selection link; The right rear horizontal / vertical switching main handle (5) and the right rear horizontal / vertical switching auxiliary handle (5a) are respectively connected to the two ends of the valve stem of the right rear horizontal / vertical leg selection link; The left rear horizontal / vertical switching main handle (6) and the left rear horizontal / vertical switching auxiliary handle (6a) are respectively connected to the two ends of the valve stem of the left rear horizontal / vertical leg selection link.

3. The outrigger interlocking operating device according to claim 2, characterized in that: The first transmission mechanism comprises: A main handle fork 1 (201), one end of the main handle fork 1 (201) being transmission-connected to the main handle 1, and the other end of the main handle fork 1 (201) being transmission-connected to one end of the valve stem 1 (202); When the main handle 1 is the left front horizontal / vertical switching main handle (4), the valve stem 1 (202) is the valve stem for selecting the left front horizontal / vertical support leg; when the main handle 1 is the left rear horizontal / vertical switching main handle (6), the valve stem 1 (202) is the valve stem for selecting the left rear horizontal / vertical support leg.

4. The outrigger interlocking operating device according to claim 3, characterized in that: The second self-locking mechanism comprises: A pull rod connecting plate (501), one end of the pull rod connecting plate (501) is transmission-connected to a secondary handle, the other end of the pull rod connecting plate (501) is connected to one end of a T-type pull rod (502), the other end of the T-type pull rod (502) is matched with a threaded bushing (505) with an axial clearance, the threaded bushing (505) is threadedly connected to one end of a main and secondary connecting pull rod (503), and the other end of the main and secondary connecting pull rod (503) is connected to the support leg valve through a bolt (50 6) connected to one end of the auxiliary operating rod connecting shaft (205), the other end of the auxiliary operating rod connecting shaft (205) is transmission-connected to the other end of the valve stem (202) through a ball reversing mechanism (204); a preload spring (504) is provided between the T-type rod (502) and the main and auxiliary connecting rods (503), and the initial position of the T-type rod (502) is that the left boss of the T-type rod (502) is in contact with the left side of the threaded bushing (505); When the auxiliary handle 1 is the left front horizontal / vertical switching auxiliary handle (4a), the valve stem 1 (202) is the valve stem for selecting the connection of the left front horizontal / vertical support leg; when the auxiliary handle 1 is the left rear horizontal / vertical switching auxiliary handle (6a), the valve stem 1 (202) is the valve stem for selecting the connection of the left rear horizontal / vertical support leg.

5. The outrigger interlocking operating device according to claim 4, characterized in that: If the auxiliary handle 1 is operated downward, the tie rod connecting plate (501) moves to the right, thereby driving the T-shaped tie rod (502), the threaded bushing (505), the main and auxiliary connecting tie rods (503), and the leg valve connecting bolt (506) to move to the right, thereby driving the valve stem 1 (202) to move to the right. At this time, the left front vertical cylinder or the left rear vertical cylinder can be extended and retracted normally; If the auxiliary handle 1 is manipulated upward, the pull rod connecting plate (501) drives the T-type pull rod (502) to move to the left, and the T-type pull rod (502) compresses the preload spring 1 (504) to the left. Since the compression force of the preload spring 1 (504) is always set to be smaller than the spring preload force of the ball reversing mechanism (204) on the right side of the valve stem 1 (202), the valve stem 1 (202) does not move with it, and the left front horizontal cylinder or the left rear horizontal cylinder does not move.

6. The outrigger interlocking operating device according to claim 2, characterized in that: The second transmission mechanism comprises: A secondary pull rod (401), one end of the secondary pull rod (401) is transmission-connected to the secondary handle 2, and the other end of the secondary pull rod (401) is transmission-connected to one end of the valve stem 2 (302) via a leg valve connection bolt (506); When the auxiliary handle 2 is the right front horizontal / vertical switching auxiliary handle (3a), the valve stem 2 (302) is the valve stem for selecting the right front horizontal / vertical support leg; when the auxiliary handle 2 is the right rear horizontal / vertical switching auxiliary handle (5a), the valve stem 2 (302) is the valve stem for selecting the right rear horizontal / vertical support leg.

7. The outrigger interlocking operating device according to claim 6, characterized in that: The second self-locking mechanism comprises: A main handle fork 2 (301), one end of the main handle fork 2 (301) is transmission-connected to the main handle 2, the other end of the main handle fork 2 (301) is transmission-connected to one end of a transition mechanism (306), the other end of the transition mechanism (306) is connected to one end of a T-type connecting rod (307), the other end of the T-type connecting rod (307) is clearance-matched with a threaded bushing 1 (308), the threaded bushing 1 (308) is threadedly connected to one end of a valve stem 2 (302), and a preload spring 2 (309) is provided between the T-type connecting rod (307) and the valve stem 2 (302); The other end of the second valve stem (302) is connected to one end of the auxiliary rod connecting shaft (305), and the auxiliary rod connecting shaft (305) is sleeved with a preload spring three (310); When the main handle 2 is the right front horizontal / vertical switching main handle (3), the valve stem 2 (302) is the valve stem for selecting the right front horizontal / vertical support leg; when the main handle 2 is the right rear horizontal / vertical switching main handle (5), the valve stem 2 (302) is the valve stem for selecting the right rear horizontal / vertical support leg.

8. The outrigger interlocking operating device according to claim 7, characterized in that: If the main handle 2 is operated downward, the main handle fork 2 (301) drives the transition mechanism (306), the T-type connecting rod (307), the threaded bushing 1 (308), and the valve stem 2 (302) to move leftward, and at this time, the right front vertical cylinder or the right rear vertical cylinder can be extended and retracted normally; If the main handle 2 is manipulated upward, the main handle fork 2 (301) drives the transition mechanism (306) and the T-type connecting rod (307) to move rightward, and the T-type connecting rod (307) compresses the preload spring 2 (309). Since the compression force of the preload spring 2 (309) is always set to be smaller than the preload force of the preload spring 3 (310), the valve stem 2 (302) does not move, and the right front horizontal oil cylinder or the right rear horizontal oil cylinder does not move.

9. The outrigger interlocking operating device according to claim 1, characterized in that: The outrigger valve assembly (20) further comprises a telescopic switching main handle (1), a telescopic switching auxiliary handle (1a), a fifth outrigger main handle (2) and a fifth outrigger auxiliary handle (2a).

10. An engineering machine, characterized in that: The engineering machinery is equipped with the outrigger interlocking control device according to any one of claims 1 to 9.

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