A support leg interlocking steering device and engineering machinery

Abstract

The application discloses a supporting leg interlocking control device and engineering machinery, the device comprises: each horizontal / vertical switching main handle arranged on the left side of the engineering machinery, each horizontal / vertical switching auxiliary handle arranged on the right side; the right front horizontal / vertical switching main handle and the right rear horizontal / vertical switching main handle are connected with a supporting leg valve group by 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 group by a second self-locking mechanism; the first self-locking mechanism is used for inaction of the right side horizontal supporting leg when the right side horizontal supporting leg is controlled on the left side; the second self-locking mechanism is used for inaction of the left side horizontal supporting leg when the left side horizontal supporting leg is controlled on the right side. The application realizes one-way operation reversing of the supporting leg horizontal oil cylinder, left-right interlocking function of reversing failure of cross-side control, and synchronous extension and contraction of the vertical oil cylinder without affecting the customer control habit and supporting leg valve integration design, improves the supporting leg operation safety, and reduces the production cost.

Description

Technical Field

[0001] The present 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 specialized engineering vehicle, a crane must meet both road-going requirements and perform lifting operations. To access the vehicle, the outriggers must first be extended. The outriggers' retraction and retraction are controlled by the outrigger hydraulic system. The outrigger controls on wheeled cranes / truck-mounted cranes are located on both sides of the vehicle, allowing operators to operate them from both sides. An operator on the left side of the crane can extend and retract the left and right outriggers, and similarly, from the right side. This blind spot prevents operators on one side of the crane from observing the actual position of the outriggers on the other side, posing a significant safety hazard.

[0003] To address this safety hazard, existing technologies primarily employ electronically controlled outrigger control, adding solenoid valves to the control circuit, and adding a handle lock mechanism. The core control components of the electronic outrigger control system are the electronically controlled valve assembly and the electronic outrigger control panel. The electronic outrigger control panel outputs logic-controlled electrical signals to control the outrigger valve assembly, switching the hydraulic circuits and thus controlling outrigger extension and retraction. The outrigger control panel can control the vertical extension and retraction of all outriggers, but only the extension and retraction of the corresponding horizontal outrigger. However, electronic outrigger control is costly and lacks market competitiveness. While adding a solenoid valve to the control circuit can reduce the cost of an electronic outrigger control system by half, it is still approximately twice as expensive as mechanical outrigger control. Furthermore, extending and retracting a single outrigger requires simultaneously pressing the control switch, changing user habits and increasing operational difficulty. Adding a handle lock mechanism, while enabling single-sided horizontal outrigger control, also restricts single-sided vertical outrigger control. The requirement to support a single vertical outrigger after lifting off the ground and then using the other vertical outrigger significantly increases the risk of vehicle tipping during outrigger operation. Summary of the Invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides an outrigger interlocking operating device and engineering machinery, which 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, while not affecting the synchronous extension and retraction of the vertical oil 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:

[0006] In the first aspect, a support leg 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 support leg 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 support leg valve group by a second transmission mechanism The leg valve group is connected in transmission; the right front horizontal / vertical switching main handle and the right rear horizontal / vertical switching main handle are connected in 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 in transmission with the leg valve group by 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 or the right rear horizontal / vertical switching main handle is operated to switch to a horizontal position on the left side of the engineering machinery; the second self-locking mechanism is used to prevent 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 operated to switch to a horizontal position on the right side of the engineering machinery.

[0007] Furthermore, the support leg valve group includes a right front horizontal / vertical support leg selection link, a left front horizontal / vertical support leg selection link, a right rear horizontal / vertical support leg selection link and a left rear horizontal / vertical support 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 support 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 support 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 support 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 support leg selection link.

[0008] Furthermore, 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 the 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.

[0009] Furthermore, the second self-locking mechanism includes: a pull rod connecting plate, one end of the pull rod connecting plate is transmission-connected to the auxiliary handle, the other end of the pull rod connecting plate is connected to one end of the T-type pull rod, the other end of the T-type pull rod is matched with the threaded bushing with axial clearance, the threaded bushing is threadedly connected to one end of the main and auxiliary connecting rods, the other end of the main and auxiliary connecting rods is connected to one end of the auxiliary operating pull rod connecting shaft through the support leg valve connecting bolt, and the other end of the auxiliary operating pull rod connecting shaft is transmission-connected to the other end of the valve stem one through a ball reversing mechanism; a preload spring one is provided between the T-type pull rod and the main and auxiliary connecting 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 auxiliary handle one is the left front horizontal / vertical switching auxiliary handle, the valve stem one is the valve stem selected for the left front horizontal / vertical support leg; when the auxiliary handle one is the left rear horizontal / vertical switching auxiliary handle, the valve stem one is the valve stem selected for the left rear horizontal / vertical support leg.

[0010] 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 set compression force of the preload spring 1 is always less 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.

[0011] Furthermore, 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 the support 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 support 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 support leg.

[0012] Furthermore, the second self-locking mechanism includes: a main handle fork two, one end of the main handle fork two is transmission connected to the main handle two, the other end of the main handle fork two is transmission connected to one end of the transition mechanism, the other end of the transition mechanism is connected to one end of the T-type connecting rod, the other end of the T-type connecting rod is clearance-matched with a threaded bushing one, the threaded bushing one is threadedly connected to one end of the valve stem two, and a preload spring two is provided between the T-type connecting rod and the valve stem two; the other end of the valve stem two is connected to one end of the auxiliary rod connecting shaft, and a preload spring three is sleeved on the auxiliary rod connecting shaft; when the main handle two is the right front horizontal / vertical switching main handle, the valve stem two is the valve stem selected for the right front horizontal / vertical support leg; when the main handle two is the right rear horizontal / vertical switching main handle, the valve stem two is the valve stem selected for the right rear horizontal / vertical support leg.

[0013] Furthermore, if the main handle two is operated downward, the main handle fork two drives the transition mechanism, T-type connecting rod, threaded bushing one, and 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 T-type connecting rod to move to the right, and the T-type connecting rod compresses the preload spring two. Since the set compression force of the preload spring two is always less 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.

[0014] Furthermore, the support leg valve group also includes a telescopic switching main handle, a telescopic switching sub-handle, a fifth support leg main handle and a fifth support leg sub-handle.

[0015] In a second aspect, an engineering machine is provided, characterized in that the engineering machine is equipped with the support leg interlocking control device described in the first aspect.

[0016] Compared with the prior art, the present invention achieves the following beneficial effects: the right front horizontal / vertical switching main handle and the right rear horizontal / vertical switching main handle are connected to the outrigger 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 to the outrigger valve group through 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 operating when the right front horizontal / vertical switching main handle or the right rear horizontal / vertical switching main handle is switched to the horizontal position on the left side of the engineering machine; the second self-locking mechanism is used to prevent the left front horizontal outrigger or the left rear horizontal outrigger from operating when the left front horizontal / vertical switching auxiliary handle or the left rear horizontal / vertical switching auxiliary handle is switched to the horizontal position on the right side of the engineering machine. Without changing customer operating habits and the integrated design of the outrigger valve, the present invention achieves a left-right interlocking function that prevents the outrigger horizontal cylinder from switching in one direction and disabling the switching in the opposite direction when operated, while also not affecting the synchronous extension and retraction of the vertical cylinder. This significantly improves outrigger operation safety, reduces manufacturing costs, and enhances market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is a top view of a support leg interlocking operating device provided by an embodiment of the present invention;

[0018] Figure 2 The first transmission mechanism ( Figure 1 BB section in the schematic diagram);

[0019] Figure 3 The second self-locking mechanism ( Figure 1 Schematic diagram of the principle of DD section in FIG;

[0020] Figure 4 The first self-locking mechanism ( Figure 1 Schematic diagram of the principle of AA section in FIG;

[0021] Figure 5 The second transmission mechanism ( Figure 1 Schematic diagram of the principle of CC section in FIG;

[0022] In the figure: 1. Telescopic switching main handle; 1a. Telescopic switching sub-handle; 2. Fifth outrigger main handle; 2a. Fifth outrigger 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. Outrigger 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 2; 302, valve stem 2; 303, valve body 2; 305, auxiliary rod connecting shaft; 306, transition mechanism; 307, T-type connecting rod; 308, threaded bushing 1; 309, preload spring 2; 310, preload spring 3; 401, auxiliary pull rod; 501, pull rod connecting plate; 502, T-type pull rod; 503, main and auxiliary connecting pull rods; 504, preload spring 1; 505, threaded bushing; 506, support leg valve connecting bolt; 60, support leg valve group bracket; 701, auxiliary operating bracket; 702, rotating pin shaft; 703, connecting pin. DETAILED DESCRIPTION

[0023] 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 solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] Example 1

[0025] like Figures 1 to 5 As shown, a support leg interlocking control device includes: a telescopic switching main handle 1, a fifth support 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; and a telescopic switching sub-handle 1a, a fifth support 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.

[0026] 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 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 switched to a horizontal position on the left side of the engineering machinery; the second self-locking mechanism is used to prevent the left front horizontal outrigger or the left rear horizontal outrigger from moving when the left front horizontal / vertical switching sub-handle 4a or the left rear horizontal / vertical switching sub-handle 6a is switched to a horizontal position on the right side of the engineering machinery.

[0027] The outrigger valve assembly 20 is mounted at a set position of the engineering machine via an outrigger valve assembly bracket 60. Each auxiliary handle is mounted at a set position of the engineering machine via an auxiliary operating bracket 701.

[0028] The support leg valve group 20 includes a right front horizontal / vertical support leg selection link, a left front horizontal / vertical support leg selection link, a right rear horizontal / vertical support leg selection link and a left rear horizontal / vertical support leg selection link; among them, 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 support 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 support 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 support 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 support leg selection link.

[0029] The telescopic switching main handle 1 and the telescopic switching auxiliary handle 1a have three states and positions: up (leg retracted), middle (closed), and down (leg extended). The fifth leg main handle 2 and the fifth leg auxiliary handle 2a have two states and positions: middle (closed), and down (vertical). 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 all have three states and positions: up (horizontal), middle (closed), and down (vertical). In summary, the main handles 3 to 6 control movement in two directions: vertical and horizontal. In the prior art, movement of the main operating handles will drive the follow-up movement of the auxiliary operating handles, thereby ensuring that the valve stem of the leg valve assembly 20 can be moved by operating the handles on both sides.

[0030] In order to realize the left-right interlocking function of the outrigger horizontal oil cylinder's unidirectional operation switching and the opposite-side operation switching failure without changing the customer's operating habits 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.

[0031] 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 cylinder and the right rear horizontal cylinder. 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 cylinders. The left front horizontal / vertical switching auxiliary handle 4a and the left rear horizontal / vertical switching auxiliary handle 6a cannot control the left front and left rear horizontal cylinders, while the right front horizontal / vertical switching auxiliary handle 3a and the right rear horizontal / vertical switching auxiliary handle 5a can normally control the right front and right rear horizontal 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 adopt 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 auxiliary handle 3a and the right rear horizontal / vertical switching auxiliary handle 5a adopt a second transmission mechanism and the leg valve group 20 to control the extension and retraction of the right horizontal / vertical leg, as shown. Figure 5 shown.

[0032] like Figure 2 As shown, the first transmission mechanism includes a main handle fork 1 201, one end of the main handle fork 1 201 is transmission connected to the main handle 1, and the other end of the main handle fork 1 201 is transmission connected to one end of the valve stem 1 202.

[0033] 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.

[0034] 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.

[0035] 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 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 an 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 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 boss of the T-type pull rod 502 is in contact with the left side of the threaded bushing 505.

[0036] The pull rod connecting plate 501 is hinged to the auxiliary handle 1 via a connecting pin 703 , and the auxiliary handle 1 is hinged to the auxiliary operating bracket 701 via a rotating pin shaft 702 .

[0037] 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 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 left rear horizontal / vertical support leg.

[0038] When 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 rod 503, and the support 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 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 the 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 less 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, and the left front horizontal cylinder or the left rear horizontal cylinder does not move, thereby achieving the opposite side operation locking function.

[0039] like Figure 5 As shown, the second transmission mechanism includes: 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 through the support leg valve connecting bolt 506.

[0040] 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.

[0041] 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.

[0042] 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 the 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 the 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 valve stem 2 302 is connected to one end of the auxiliary rod connecting shaft 305, and a preload spring 310 is sleeved on the auxiliary rod connecting shaft 305.

[0043] 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.

[0044] 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 extends and retracts 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, 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, thereby realizing the locking function of the opposite-side operation.

[0045] The present invention realizes the non-following of the valve stem of the movable support leg 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, and at the same time does not affect the following movement of the vertical selection valve stem, thereby realizing the synchronous extension and retraction of the vertical oil cylinder, avoiding the risk of vehicle overturning caused by the support of the vertical leg on the other side after the vertical support leg on one side is lifted off the ground, greatly improving the safety of the support leg operation, and meeting the requirements of the market and current standards of various countries.

[0046] 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 operation method, and reduces the cost by 40% compared with the control method of adding a solenoid valve to the control loop. It has higher reliability and greatly improves the product's market competitiveness.

[0047] Example 2

[0048] Based on the outrigger interlocking control device described in the first embodiment, this embodiment provides an engineering machine equipped with the outrigger interlocking control device described in the first embodiment.

[0049] 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) 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 connected to the outrigger valve group (20) through 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 group (20) using a first self-locking mechanism; The left front horizontal / vertical switching auxiliary handle (4a) and the left rear horizontal / vertical switching auxiliary 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 support leg or the right rear horizontal support leg 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 the 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 operated on the right side of the engineering machine to switch to the horizontal position; The support leg valve group (20) includes a right front horizontal / vertical support leg selection link, a left front horizontal / vertical support leg selection link, a right rear horizontal / vertical support leg selection link, and a left rear horizontal / vertical support leg selection link; 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 support 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 support 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 support 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 support leg selection link; The second self-locking mechanism includes: A pull rod connecting plate (501), one end of the pull rod connecting plate (501) is connected to a secondary handle in a transmission manner, 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 the main and secondary connecting pull rods (503), and the other end of the main and secondary connecting pull rods (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), and the other end of the auxiliary operating 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 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; All horizontal / vertical switching sub-handles and horizontal / vertical switching main handles are used for horizontal and vertical switching; All horizontal / vertical outrigger selection links are used for horizontal and vertical outrigger selection.

2. The leg interlocking operating device according to claim 1, characterized in that: The first transmission mechanism includes: A main handle fork 1 (201), one end of the main handle fork 1 (201) is transmission-connected to the main handle 1, and the other end of the main handle fork 1 (201) is 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.

3. The leg interlocking operating device according to claim 2, 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 normally extended and retracted; If the auxiliary handle 1 is operated 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 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, and the left front horizontal cylinder or the left rear horizontal cylinder does not move.

4. The leg interlocking operating device according to claim 1, characterized in that: The second transmission mechanism includes: 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 connecting 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.

5. The leg interlocking operating device according to claim 4, characterized in that: The first self-locking mechanism comprises: Main handle fork 2 (301), one end of the main handle fork 2 (301) is transmission-connected to 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 (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.

6. The leg interlocking operating device according to claim 5, characterized in that: If the main handle 2 is operated downward, the main handle fork 2 (301) drives the transition mechanism (306), T-type connecting rod (307), threaded bushing 1 (308), and 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 manipulated 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 smaller than the preload force of the preload spring 3 (310), the valve stem 2 (302) does not move, and the right front horizontal cylinder or the right rear horizontal cylinder does not move.

7. The leg 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).

8. An engineering machine, characterized in that: The engineering machinery is equipped with the outrigger interlocking operating device according to any one of claims 1 to 7.

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