A hydraulic multi-way valve operating mechanism

Abstract

The present invention relates to an operating mechanism of a hydraulic multi-way valve, comprising a first support, a hydraulic multi-way valve, a pull rod, a first operating handle, and a second operating handle. Both ends of the pull rod are yoke structures. The yoke structure at one end of the pull rod is hingedly connected to a joint bearing through a first connecting pin, and the other end of the joint bearing is threadedly connected to the valve stem of the hydraulic multi-way valve. The yoke structure at the other end of the pull rod is fixed to the ear plate of the second operating handle through a second connecting pin, and the second operating handle is fixed to the second support. It can be seen from the above technical solution that the present invention adds a joint bearing at the connection between the pull rod and the hydraulic multi-way valve, that is, both ends of the pull rod are hinged, and the force of the pull rod itself is a simply supported beam structure, so that the relative position of the two ends of the pull rod and the support stiffness have little effect on the force of the pull rod.

Description

Technical Field

[0001] The invention relates to an operating mechanism of a hydraulic multi-way valve. Background Art

[0002] like Figure 1 As shown, the operating mechanism of the existing hydraulic multi-way valve is generally composed of a hydraulic multi-way valve 20, a first support 30, a first operating handle 10, a pull rod 40, a second operating handle 70, a pin 50, a connecting pin 60, and a second support 80. The principle is: the first support is connected or welded to the frame by bolts, the hydraulic multi-way valve is fastened to the first support by installing standard parts, the first operating handle has two pin holes, which are respectively fixed to the fixed ear plate and the valve stem ear plate of the hydraulic multi-way valve through the connecting pin, and the valve stem of the hydraulic multi-way valve can be directly operated by manually moving the first operating handle to achieve its three-position movement and realize the switching of different hydraulic circuits; on the other side of the vehicle, the second operating handle is fixed to the second support through the pin, one end of the pull rod is fixed to the ear plate of the second operating handle through the connecting pin, and the other end is fixed to the valve stem of the hydraulic multi-way valve through a threaded connection, and the second operating handle is manually moved to achieve the operation of the valve stem of the hydraulic multi-way valve through the pull rod to achieve its three-position movement, that is, to achieve the switching of different hydraulic circuits.

[0003] In the existing structure, since the connection between the pull rod and the hydraulic multi-way valve is a threaded connection, that is, a rigid connection, and the connection with the second handle is a pin connection, that is, a plane hinge, the force form of the pull rod itself is an over-static cantilever beam structure. The relative position and support stiffness of the two ends of the pull rod directly affect the force conditions of the pull rod and the hydraulic multi-way valve end. During the driving process of the vehicle, the pull rod is prone to early damage at the connection between the pull rod and the hydraulic multi-way valve. At the same time, the existing structure requires high relative position accuracy between the first support and the second support, and requires large support stiffness of the second support. There are disadvantages such as complex support structure, short service life of the pull rod, poor reliability, and complex process. Summary of the invention

[0004] The object of the present invention is to provide an operating mechanism for a hydraulic multi-way valve that overcomes the above-mentioned disadvantages.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: comprising a first support, a hydraulic multi-way valve, a pull rod, a first operating handle, and a second operating handle, wherein the first support is fixed on the vehicle frame, the hydraulic multi-way valve is fastened on the first support, the first operating handle is hingedly connected to the fixed ear plate of the hydraulic multi-way valve and the ear plate of the valve stem respectively through two connecting pins, both ends of the pull rod are yoke structures, the yoke structure at one end of the pull rod is hingedly connected to the joint bearing through the first connecting pin shaft, the other end of the joint bearing is threadedly connected to the valve stem of the hydraulic multi-way valve, the yoke structure at the other end of the pull rod is fixed to the ear plate of the second operating handle through the second connecting pin shaft, and the second operating handle is fixed on the second support;

[0006] The second support is an inverted U-shaped support, and a U-shaped bent plate connected to the second support with bolts is provided above the second support, and the U-shaped bent plate is welded and connected to the walkway of the frame.

[0007] It can be seen from the above technical solution that the present invention adds a joint bearing at the connection between the pull rod and the hydraulic multi-way valve, that is, both ends of the pull rod are hinged, and the force of the pull rod itself is a simply supported beam structure, so the relative position and support stiffness of the two ends of the pull rod have little effect on the force of the pull rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the background technology;

[0009] Figure 2 It is a schematic diagram of the structure of the present invention;

[0010] Figure 3 yes Figure 2 A magnified view of part A;

[0011] Figure 4 It is a structural schematic diagram of the pull rod of the present invention;

[0012] Figure 5 is a schematic structural diagram of the second support of the present invention;

[0013] Figure 6 It is a structural schematic diagram of the spherical bearing of the present invention. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings:

[0015] like Figure 2 , Figure 3The operating mechanism of a hydraulic multi-way valve shown in the figure comprises a first support 1, a hydraulic multi-way valve 2, a pull rod 3, a first operating handle 4, and a second operating handle 5. The first support 1 is fixed to the frame, the hydraulic multi-way valve 2 is fastened to the first support 1, and the first operating handle 4 is hingedly connected to the fixed ear plate of the hydraulic multi-way valve 2 and the ear plate of the valve stem through two connecting pins, as shown in FIG. Figure 4 , Figure 6 As shown, both ends of the pull rod 3 are yoke structures. The yoke structure at one end of the pull rod 3 is hingedly connected to the spherical bearing 7 through a first connecting pin 6. The other end of the spherical bearing 7 is threadedly connected to the valve stem of the hydraulic multi-way valve 2. The yoke structure at the other end of the pull rod 3 is fixed to the ear plate of the second operating handle 5 through a second connecting pin 8. The second operating handle 5 is fixed on the second support 9.

[0016] Further, such as Figure 5 As shown, the second support 9 is an inverted U-shaped support, and a U-shaped bent plate 91 connected to the second support 9 with bolts is provided above the second support 9, and the U-shaped bent plate 91 is welded to the walkway of the frame.

[0017] Specifically, the first support 1 is connected to the bracket by bolts or welding, the hydraulic multi-way valve 2 is fastened to the first support 4 by installing standard parts, the first operating handle 4 has two pin holes, which are respectively fixed to the fixed ear plate and the ear plate of the valve stem of the hydraulic multi-way valve 2 by connecting pins. The valve stem of the hydraulic multi-way valve 2 can be directly operated by manually pulling the first operating handle 4 to achieve its three-position movement to form the switching of different hydraulic circuits; the joint bearing 7 is connected to the valve stem of the hydraulic multi-way valve 2 by threads, and both ends of the pull rod 3 are fork structures, one end of which is hingedly connected to the joint bearing 7 through the first connecting pin 6, and the other end is fixed to the ear plate of the second operating handle 5 through the second connecting pin 8. By manually pulling the second operating handle 5, the valve stem of the hydraulic multi-way valve 2 can be operated through the pull rod 3 and the joint bearing 7 to achieve its three-position movement to form the switching of different hydraulic circuits.

[0018] In summary, the present invention adds a joint bearing at the connection between the pull rod and the hydraulic multi-way valve, that is, both ends of the pull rod are hinged, and the force of the pull rod itself is a simply supported beam structure, so the relative position and support stiffness of the two ends of the pull rod have little effect on the force of the pull rod.

[0019] The beneficial effects of the present invention are: 1) the process is simple, and the present invention has low requirements on the position accuracy of the first support and the second support; 2) the structure is simple, and the present invention has low requirements on the supporting stiffness of the second support, and does not need to add a complex structure to the welding of the bracket and the walkway of the frame; 3) the various parts of the present invention have a long service life and high reliability.

[0020] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A hydraulic multi-way valve operating mechanism, comprising a first support (1), a hydraulic multi-way valve (2), a pull rod (3), a first operating handle (4), and a second operating handle (5), wherein the first support (1) is fixed on a vehicle frame, the hydraulic multi-way valve (2) is fastened on the first support (1), and the first operating handle (4) is hingedly connected to a fixed ear plate of the hydraulic multi-way valve (2) and an ear plate of a valve stem through two connecting pins, respectively, and characterized in that: Both ends of the pull rod (3) are yoke structures, the yoke structure at one end of the pull rod (3) is hingedly connected to a joint bearing (7) via a first connecting pin (6), the other end of the joint bearing (7) is threadedly connected to a valve stem of a hydraulic multi-way valve (2), the yoke structure at the other end of the pull rod (3) is fixed to an ear plate of a second operating handle (5) via a second connecting pin (8), and the second operating handle (5) is fixed to a second support (9); The second support (9) is an inverted U-shaped support, and a U-shaped bent plate (91) connected to the second support (9) with bolts is provided above the second support (9), and the U-shaped bent plate (91) is welded to the walkway of the frame; The first support (1) is connected to the bracket by bolts or welded, and the hydraulic multi-way valve (2) is fastened to the first support (1) by installing standard parts.

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