Locking device of multi-operation-mode switching valve for excavator

Abstract

A locking device of a multi-operation-mode switching valve for an excavator comprises a multi-way rotary valve assembly, a locking plate is connected to an end cover of the multi-way rotary valve assembly, a handle is arranged on the locking plate, a valve element of the multi-way rotary valve assembly penetrates through the locking plate to be connected with the handle, the handle and the locking plate are positioned through an indexing pin, a plurality of indexing pin holes are formed in the locking plate, and the indexing pin holes are connected with the indexing pin holes. And the positioned handle is fixed with the lock plate through the lock. According to the locking device of the multi-operation-mode switching valve for the excavator, self-locking and reversing positioning of the switching valve are achieved through the self-locking type indexing pin and the 90-degree staggered I-shaped handle, the rotary valve can be conveniently rotated, the working modes can be easily switched, operation is convenient, observation holes of multiple modes are further formed, an operator can conveniently observe and use the multi-operation-mode switching valve, and the locking device is suitable for popularization and application. Unnecessary safety problems are avoided, and use safety and efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, and particularly to a locking device for a multi-operation mode switching valve of an excavator. Background Art

[0002] Since the operating habits of excavator drivers in different regions are different, the operating modes of excavators produced by each company are also different, resulting in a large number of excavators with different operating modes on the market, which is very inconvenient for excavator drivers. At present, some excavators on the market use a four-position sixteen-way directional control valve to connect between the main valve and the pilot valve, and realize the switching of multiple operating modes of the excavator through directional changes at different positions. However, for the sake of operating safety and to prevent the selected operating mode from being misoperated by non-professionals, a device is usually used to lock the switching valve after the directional change.

[0003] At present, the locking devices used are locked by fixing screws and mechanical locks. This structure is cumbersome to assemble, troublesome to disassemble and assemble for operators who often operate the directional change, and the technical structure is complex, with many structural parts and some of them being small. These small parts have the risk of being lost during each directional change, increasing the production and use costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a locking device for a multi-operation mode switching valve of an excavator with a simple structure and good effect.

[0005] The present invention is realized as follows: A locking device for a multi-operation mode switching valve of an excavator includes a multi-way rotary valve assembly. A lock plate is connected to the end cover of the multi-way rotary valve assembly. A handle is provided on the lock plate. The spool of the multi-way rotary valve assembly passes through the lock plate and is connected to the handle. The handle and the lock plate are positioned by a indexing pin. A number of indexing pin holes are provided on the lock plate. After positioning, the handle is fixed to the lock plate by a lock.

[0006] Further, the lock plate is fixed to the end cover by a pin.

[0007] The handle is a special-shaped I-shaped handle, including a vertical rod, a cross rod and a bottom plate. The cross rod and the bottom plate are arranged at both ends of the vertical rod.

[0008] The handle is a 90-degree I-shaped handle, and the cross rod and the bottom plate are perpendicular in space.

[0009] The lower end of the vertical rod is welded to the bottom plate, and the upper end of the vertical rod is connected to the cross rod by a pin shaft.

[0010] The bottom plate is provided with a lock hole I, an observation hole, a pin hole I, a vertical rod fixing hole and a indexing pin hole. The lock hole I and the indexing pin hole are arranged at both ends of the bottom plate. The observation hole is arranged on one side close to the lock hole. The pin hole I is arranged in the vertical rod fixing hole for connecting the valve core.

[0011] The lock plate is provided with a valve core transition hole, a pin hole II, a lock hole II, a bolt transition hole and a indexing pin transition hole. The valve core transition hole is arranged at the center of the lock plate. The lock plate is fixed to the end cover through two pin holes II. The lock hole II and the self-locking indexing pin transition hole are arranged in pairs and cooperate with the lock hole I and the indexing pin hole. The number of pairs of the lock hole II and the self-locking indexing pin transition hole is the same as the number of types of operation modes of the multi-way rotary valve.

[0012] The upper end of the valve core passes through the valve core transition hole and is fixed to the lower end of the vertical rod through a pin shaft.

[0013] The indexing pin is a self-locking indexing pin.

[0014] A sealing ring is arranged between the valve core and the lock plate.

[0015] The present invention has the following advantages: The locking device of the multi-operation mode switching valve for an excavator of the present invention realizes the self-locking and commutation positioning of the switching valve through a self-locking indexing pin and a 90° misaligned I-shaped handle, which is convenient for rotating the rotary valve and easily switching the working mode, and is convenient for operation. It is also provided with observation holes for multiple modes, which is convenient for the operator to observe and use, avoids unnecessary safety problems, and improves the safety and efficiency of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0017] In the drawings: Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the top view of the present invention; Figure 3 is the internal structural sectional view of the present invention; Figure 4 is the structural schematic diagram of the bottom plate of the present invention; Figure 5 is the structural schematic diagram of the lock plate of the present invention.

[0018] In the figure: 1. Handle; 11. Vertical rod; 12. Cross bar; 13. Base plate, 131. Lock hole I; 132. Observation hole; 133. Pin hole I; 134. Vertical rod fixing hole; 135. Index pin hole; 2. Index pin; 3. Lock plate, 31. Spool transition hole; 32. Pin hole II; 33. Lock hole II; 34. Bolt transition hole; 35. Index pin transition hole; 4. Lock; 5. Overall multi-way rotary valve; 51. End cover; 52. Spool; 6. Sealing ring.

[0019] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] Such as Figures 1 to 5The locking device of a valve for switching multiple operating modes for an excavator shown in the figure comprises a multi-way rotary valve assembly 5, a locking plate 3 is connected to the end cover 51 of the multi-way rotary valve assembly 5, a handle 1 is provided on the locking plate 3, a valve core 52 of the multi-way rotary valve assembly 5 passes through the locking plate 3 and is connected to the handle 1, the handle 1 and the locking plate 3 are positioned by an indexing pin 2, a plurality of indexing pin holes 135 are provided on the locking plate 3, and the positioned handle 1 is fixed to the locking plate 3 by a lock 4. The locking device of the excavator multiple operation mode switching valve of the present invention comprises a multi-way rotary valve as a whole, a valve core and an end cover are arranged in the multi-way rotary valve as a whole, the valve core rotates in the valve body to change the working mode of the multi-way rotary valve as a whole, and also comprises a handle and a lock plate, the handle is connected with the valve core, the position of the valve core is changed by rotating the handle, the lock plate is fixed with the end cover, the lock plate is provided with indication positions of different working modes, the handle is rotated according to the indication position, after rotating into position, the handle is connected with the lock plate and the end cover through the indexing pin, and the handle is fixed with the lock plate and the end cover through the lock, and the lock plate is provided with a plurality of indexing pin holes for fixing the position of the indexing pin, wherein the position of the indexing pin hole corresponds to the indication position of the working mode. The device of the present invention changes the working mode by rotating the valve core with the handle, and positions it by the indexing pin, and is quick to operate and easy to use.

[0024] like Figures 1 to 5 The locking device of a multiple operation mode switching valve for an excavator is shown, wherein the locking plate 3 is fixed to the end cover 51 by a pin. The locking plate of the present invention is fixed to the end cover, and pin holes for connecting pins are provided on the locking plate and the end cover.

[0025] like Figures 1 to 3 The locking device of a multiple operation mode switching valve for an excavator is shown, wherein the handle 1 is a special-shaped I-shaped handle, comprising a vertical rod 11, a horizontal rod 12 and a bottom plate 13, wherein the horizontal rod 12 and the bottom plate 13 are arranged at both ends of the vertical rod 11. The handle of the present invention is a special-shaped I-shaped handle, wherein the vertical rod connects the horizontal rod and the bottom plate, and the horizontal rod and the bottom plate are not coplanar in space, and the operation is convenient when in use.

[0026] like Figures 1 to 5A locking device for a multi-operation mode switching valve of an excavator as shown. The handle 1 is a 90-degree I-shaped handle, and the cross bar 12 and the bottom plate 13 are perpendicular in space. The lower end of the vertical rod 11 is welded to the bottom plate 13, and the upper end of the vertical rod 11 is connected to the cross bar 12 by a pin shaft. The handle of the present invention is a 90-degree I-shaped handle, the cross bar and the bottom plate are perpendicular in space, the upper end of the vertical rod is movably connected to the cross bar, a through hole for connecting the cross bar is provided at the upper end of the vertical rod, and a pin hole for fixing the cross bar is provided in the through hole. The cross bar can be separated from the vertical rod according to needs, which is convenient for transportation and also convenient for replacing the cross bar; the vertical rod is welded to the bottom plate, and the vertical rod is welded in the vertical rod fixing hole of the bottom plate. During use, the vertical rod and the bottom plate rotate simultaneously. Using the welded connection method can strengthen the connection strength and improve the safety of use.

[0027] As Figure 4 A locking device for a multi-operation mode switching valve of an excavator as shown. The bottom plate 13 is provided with a lock hole I 131, an observation hole 132, a pin hole I 133, a vertical rod fixing hole 134 and a indexing pin hole 135. The lock hole I 131 and the indexing pin hole 135 are arranged at both ends of the bottom plate 13. The observation hole 132 is arranged on one side close to the lock hole 131. The pin hole I 133 is arranged in the vertical rod fixing hole 134 for connecting the valve core 52. The bottom plate of the present invention is successively provided with a lock hole, an observation hole, a pin hole, a vertical rod fixing hole and an indexing pin hole. The lock hole is used to connect with the lock to fix the bottom plate and the lock plate together. The observation hole is used to check the working mode position marked on the lock plate for easy operation. A vertical rod is arranged in the vertical rod fixing hole. The vertical rod is a hollow rod. The lower end of the vertical rod is connected to the upper end of the valve core, and the valve core and the vertical rod are connected together by a pin shaft to fix the handle and the valve core; the indexing pin hole is connected to the indexing pin and used together with the indexing pin transition hole on the lock plate to realize the function of indexing pin positioning.

[0028] As Figure 5A locking device for a multi-operation mode switching valve of an excavator as shown. A spool transition hole 31, a pin hole II 32, a lock hole II 33, a bolt transition hole 34 and a indexing pin transition hole 35 are provided on the lock plate 3. The spool transition hole 31 is arranged at the center of the lock plate 3. The lock plate 3 is fixed to the end cover 51 through two pin holes II 32. The lock hole II 33 and the self-locking indexing pin transition hole 35 are arranged in pairs and are used in cooperation with the lock hole I 131 and the indexing pin hole 135. The number of pairs of the lock hole II 33 and the self-locking indexing pin transition hole 35 is the same as the number of types of operation modes of the multi-way directional control valve. On the lock plate of the present invention, there are a spool transition hole, a pin hole, a lock hole, a bolt transition hole and an indexing pin transition hole. The upper end of the spool passes through the spool transition hole and is connected to the vertical rod on the bottom plate; the lock plate is fixed to the end cover through the pin hole; the position of the bolt transition hole corresponds to the position of the bolt on the end cover and is used when connecting the rotary valve end cover and the valve body with bolts; the lock hole is used in cooperation with the lock hole on the floor, and the lock plate and the handle are fixed together with a lock. The lock hole and the indexing pin transition hole appear in pairs and correspond to the positions of the lock hole and the indexing pin hole on the bottom plate. Since there are four types in total for the multi-way directional control valve, there are four position marks on the lock plate, and at the same time, there are four pairs of lock holes and indexing pin holes. First, select the working mode to be used through the position marks, then position through the indexing pin, and finally lock with the lock to complete the switching of the operation mode, and it can effectively prevent misoperation and improve the use safety.

[0029] As Figures 3 to 5 A locking device for a multi-operation mode switching valve of an excavator as shown. The upper end of the spool 52 passes through the spool transition hole 31 and is fixed to the lower end of the vertical rod 11 through a pin shaft. The vertical rod of the I-shaped handle of the present invention is connected to the spool of the multi-way directional control valve by using a pin hole. The rotation of the vertical rod drives the rotation of the spool of the multi-way directional control valve and is fixed through a pin shaft, which is convenient for installation and disassembly, transportation and later maintenance.

[0030] As Figures 1 to 3 A locking device for a multi-operation mode switching valve of an excavator as shown. The indexing pin 2 is a self-locking indexing pin. The indexing pin of the present invention is a self-locking indexing pin, and the self-locking indexing pin is used to be fixed on the I-shaped bottom plate and the valve body of the multi-way directional control valve. When the top cap of the indexing pin is pulled out, the I-shaped handle and the valve body of the multi-way valve can rotate relative to each other. When pressed, the handle and the valve body of the multi-way directional control valve cannot move relative to each other, and the switching of four modes can be realized.

[0031] As Figure 3 A locking device for a multi-operation mode switching valve of an excavator as shown. A sealing ring 6 is provided between the spool 52 and the lock plate 3.

[0032] In the specification provided herein, a large number of specific details are set forth. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0033] In addition, those skilled in the art will understand that although some embodiments described herein include certain features contained in other embodiments but not others, the combinations of features of different embodiments are equally intended to be within the scope of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.

[0034] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the equivalent embodiments by using the technical content prompted above. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A locking device for a multi-operation mode switching valve of an excavator, characterized in that: It includes a multi-way valve assembly (5). A locking plate (3) is connected to the end cover (51) of the multi-way valve assembly (5). A handle (1) is provided on the locking plate (3). The valve core (52) of the multi-way valve assembly (5) passes through the locking plate (3) and is connected to the handle (1). The handle (1) and the locking plate (3) are positioned by a indexing pin (2). A number of indexing pin holes (135) are provided on the locking plate (3). The positioned handle (1) is fixed to the locking plate (3) by a lock (4).

2. The locking device of a multi-operation mode switching valve for an excavator according to claim 1, characterized in that: The locking plate (3) is fixed to the end cover (51) by a pin.

3. The locking device of a multi-operation mode switching valve for an excavator according to claim 1, characterized in that: The handle (1) is a special-shaped I-shaped handle, including a vertical rod (11), a horizontal rod (12) and a bottom plate (13). The horizontal rod (12) and the bottom plate (13) are arranged at both ends of the vertical rod (11).

4. The locking device of a multi-operation mode switching valve for an excavator according to claim 3, characterized in that: The handle (1) is a 90-degree I-shaped handle, and the horizontal rod (12) and the bottom plate (13) are perpendicular in space.

5. The locking device of a multi-operation mode switching valve for an excavator according to claim 3, characterized in that: The lower end of the vertical rod (11) is welded to the bottom plate (13), and the upper end of the vertical rod (11) is connected to the horizontal rod (12) by a pin shaft.

6. The locking device of a multi-operation mode switching valve for an excavator according to claim 3, characterized in that: The bottom plate (13) is provided with a lock hole I (131), an observation hole (132), a pin hole I (133), a vertical rod fixing hole (134) and an indexing pin hole (135). The lock hole I (131) and the indexing pin hole (135) are arranged at both ends of the bottom plate (13). The observation hole (132) is arranged on one side close to the lock hole (131). The pin hole I (133) is arranged in the vertical rod fixing hole (134) for connecting the valve core (52).

7. The locking device of a multi-operation mode switching valve for an excavator according to claim 6, characterized in that: The locking plate (3) is provided with a valve core transition hole (31), a pin hole II (32), a lock hole II (33), a bolt transition hole (34) and an indexing pin transition hole (35). The valve core transition hole (31) is arranged at the center of the locking plate (3). The locking plate (3) is fixed to the end cover (51) through two pin holes II (32). The lock hole II (33) and the self-locking indexing pin transition hole (35) are arranged in pairs and are used in cooperation with the lock hole I (131) and the indexing pin hole (135). The number of pairs of the lock hole II (33) and the self-locking indexing pin transition hole (35) is the same as the number of types of operation modes of the multi-way valve.

8. The locking device of a multi-operation mode switching valve for an excavator according to claim 7, characterized in that: The upper end of the valve core (52) passes through the valve core transition hole (31) and is fixed to the lower end of the vertical rod (11) by a pin shaft.

9. The locking device of a multi-operation mode switching valve for an excavator according to claim 1, characterized in that: The indexing pin (2) is a self-locking indexing pin.

10. The locking device of a multi-operation mode switching valve for an excavator according to claim 1, characterized in that: A sealing ring (6) is provided between the valve core (52) and the locking plate (3).

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