CN214167268U

CN214167268U - Reversing valve body of multi-way reversing valve for forklift

Info

Publication number: CN214167268U
Application number: CN202023349233.2U
Authority: CN
Inventors: 方月江; 祁泉炜; 许凯
Original assignee: Jingjiang Zhongshengxin Machinery Mfg Co ltd
Current assignee: Jingjiang Zhongshengxin Machinery Mfg Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-10
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a switching-over valve body of multichannel reversing valve for fork truck belongs to the field of reversing valve, and it includes valve block and connection boss, connect boss integrated into one piece in the middle part of relative both sides wall on the valve block length direction, set up the connecting hole that supplies fastening bolt to pass on the connection boss, each four edges department homogeneous body shaping that the valve block is close to the terminal surface of each connection boss have a location lug, each the terminal surface that the valve block was kept away from to location lug is the terminal surface looks parallel and level that the valve block was kept away from to connection lug. The installation positioning between the reversing valve bodies is convenient, and the installation accuracy of the reversing valve bodies is improved.

Description

Reversing valve body of multi-way reversing valve for forklift

Technical Field

The application relates to the field of reversing valves, in particular to a reversing valve body of a multi-way reversing valve for a forklift.

Background

The reversing valve is a valve which changes the on-off relationship of each oil duct connected in the valve body by means of the relative movement between the valve core and the valve body. The multi-way reversing valve is a combined valve taking two or more reversing valves as main bodies. According to different working requirements, auxiliary valves such as a safety overflow valve, a one-way valve, an oil replenishing valve and the like can be combined. Compared with other types of valves, the multi-way reversing valve has the advantages of compact structure, small pressure loss, small sliding valve moving resistance, multi-position function, long service life, simple manufacture and the like.

Referring to fig. 1, the related multi-way reversing valve 3 mostly adopts a split structure and is composed of an oil inlet body 1, an oil return body 2, a plurality of reversing valves 3 and the like, wherein the reversing valve 3 comprises a valve core 6 and a reversing valve 3 body, an oil duct is arranged in the reversing valve 3 body, and the valve core 6 is movably connected in the reversing valve 3 body and used for controlling the on-off of each oil duct in the reversing valve 3 body. The plurality of reversing valves 3 are arranged and attached to each other, and the oil inlet body 1 and the oil return body 2 are arranged at two ends of the arranged reversing valves 3. The oil inlet body 1, the oil return body 2 and the reversing valves 3 are connected into a whole by fastening bolts.

In view of the above-mentioned related technologies, the inventor thinks that because two adjacent reversing valve bodies are mutually attached and locked and fixed by fastening bolts, the relative positions of the two adjacent reversing valve bodies during installation are difficult to align, and are easy to misplace.

SUMMERY OF THE UTILITY MODEL

Relative position when connecting is difficult to align in order to improve two adjacent switching-over valve body erection, the problem of easy dislocation, this application provides a switching-over valve body of fork truck with multichannel switching-over valve.

The application provides a reversing valve body of fork truck is with multichannel switching-over valve adopts following technical scheme:

the utility model provides a switching-over valve body of fork truck with multichannel reversing valve, includes valve block and connection boss, connection boss integrated into one piece in the middle part of relative both sides wall on the valve block length direction, set up the connecting hole that supplies fastening bolt to pass on the connection boss, each four edges department homogeneous body shaping that the valve block is close to the terminal surface of each connection boss have a location lug, each the terminal surface that the valve block was kept away from to the terminal surface of valve block and connection lug are kept away from the terminal surface looks parallel and level of valve block.

By adopting the technical scheme, when the two adjacent reversing valve bodies are connected, the fastening bolt passes through the connecting hole of each reversing valve body, in the process of locking the fastening bolt, the adjacent reversing valve bodies are continuously close to each other, after the connecting bosses of the adjacent reversing valve bodies are attached to each other, a worker can observe the relative positions of the positioning lugs of the adjacent reversing valve bodies, thereby judging whether the reversing valve bodies are aligned or not and carrying out corresponding adjustment, and the positioning lugs are arranged at the four corners of the end surface of the reversing valve body close to each connecting lug boss, thereby not only facilitating the observation of the positioning lugs, but also effectively showing the relative position relation of the whole adjacent reversing valve bodies, after the position is adjusted, the fastening bolt is screwed to fix the adjacent reversing valves, so that the reversing valve bodies are convenient to install and position, and the installation accuracy of the reversing valve bodies is improved.

Optionally, each of the connecting bosses is provided with an oil passing port through which hydraulic oil flows, the oil passing port is communicated with an oil path in the valve block, and the connecting boss is provided with a sealing structure on the outer side close to the oil passing port.

By adopting the technical scheme, when hydraulic oil flows in different reversing valve bodies through the oil passing ports, the sealing structure seals the oil passing port connecting part of the adjacent reversing valve bodies, so that the hydraulic oil is not easy to leak out from the connecting part of the adjacent reversing valve bodies, and the good operation of the multi-way reversing valve is ensured.

Optionally, the oil passing port includes an oil inlet, an unloading port and an oil return port, a circular primary sealing groove is formed in the connecting boss, the sealing structure includes a primary sealing ring, the primary sealing ring is clamped in the primary sealing groove, the oil inlet, the unloading port and the oil return port are all located in an area surrounded by the primary sealing groove, and the diameter of the primary sealing ring is greater than the depth of the primary sealing groove.

Through adopting above-mentioned technical scheme, two adjacent switching-over valve bodies paste tight fixed back, and the one-level sealing washer receives the extrusion and warp and fill up the sealed slot of one-level to seal adjacent switching-over valve body, simple structure, it is sealed reliable, reduce the possibility that hydraulic oil of oil cut department was revealed.

Optionally, secondary sealing grooves are formed in the outer sides of the oil inlet, the unloading oil port and the oil return port, the sealing structure further comprises three secondary sealing rings, the three secondary sealing rings correspond to the oil inlet, the unloading oil port and the oil return port one to one, each secondary sealing ring is clamped in each secondary sealing groove, and the diameter of each secondary sealing ring is larger than the groove depth of each secondary sealing groove.

By adopting the technical scheme, the secondary sealing ring further seals the oil inlet, the unloading oil port and the oil return port, and the sealing effect of the oil passing port between two adjacent reversing valves is improved.

Optionally, the end face of the connecting boss near the edge of the unloading oil port is extended outwards to form an unloading groove.

By adopting the technical scheme, the unloading groove has a buffering effect on the hydraulic oil flowing through the unloading oil port, the unloading effect of the unloading oil port is improved, and the hydraulic oil flows back to the hydraulic oil tank under the condition of lower pressure, so that the power loss is reduced, and the heating of a hydraulic system is reduced.

Optionally, a check valve mounting groove is formed in the connecting boss, and the bottom of the check valve mounting groove is communicated with an oil path in the valve block.

Through adopting above-mentioned technical scheme, when carrying out the equipment of multichannel switching-over valve, just install the check valve in the check valve mounting groove, hug closely each other between the adjacent switching-over valve body, can put into the spring in the check valve mounting groove and support tight installation with the check valve, compare in installing the top at the switching-over valve body with the check valve, need not to use the plug, can reduce the volume of multichannel valve, and the structure of multichannel switching-over valve is also more compact, the installation of being convenient for.

Optionally, a third-stage sealing groove is formed in the outer side of the check valve mounting groove, the third-stage sealing groove is located in an area surrounded by the first-stage sealing groove, a third-stage sealing ring is clamped in the third-stage sealing groove, and the diameter of the third-stage sealing ring is larger than the groove depth of the third-stage sealing groove.

Through adopting above-mentioned technical scheme, seal around the check valve mounting groove, reduce hydraulic oil on the one hand and reveal from the check valve mounting groove, simultaneously, also block the hydraulic oil that reveals in the tertiary sealing washer outside and enter into the check valve mounting groove, ensure the good operation of check valve.

Optionally, the connecting holes include a first connecting through hole and a second connecting through hole, the first connecting through hole is located on one side of the connecting boss, the second connecting through hole is located on one side of the connecting boss far away from the first connecting through hole, and a connecting line between the centers of the first connecting through hole and the two second connecting through holes is an isosceles triangle.

By adopting the technical scheme, the clamping stress of the adjacent reversing valve bodies is more balanced, and the connection stability between the reversing valve bodies is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the positioning lug and the positioning boss are arranged, so that the reversing valve bodies can be conveniently installed and positioned, and the installation accuracy of the reversing valve bodies is improved;

2. through setting up seal structure, effectively improve the leakproofness of being connected between two adjacent switching-over valve bodies for hydraulic oil is difficult for revealing from the junction between two adjacent switching-over valve bodies.

Drawings

Fig. 1 is a schematic view of an overall structure of a related art multiple directional control valve.

Fig. 2 is a schematic overall structure diagram of a directional control valve body of a multi-way directional control valve for a forklift according to an embodiment of the present application.

Fig. 3 is an exploded view of a directional control valve body of a multi-way directional control valve for a forklift according to an embodiment of the present invention.

Description of reference numerals: 1. an oil inlet body; 2. returning oil; 3. a diverter valve; 4. a diverter valve body; 41. a valve block; 42. connecting the bosses; 421. a primary sealing groove; 422. a secondary sealing groove; 423. a third stage sealing groove; 43. positioning the bump; 441. a first connecting through hole; 44. connecting holes; 442. a second connecting through hole; 45. an oil passing port; 451. an oil inlet; 452. an oil return port; 453. an unloading oil port; 454. an unloading groove; 46. a check valve mounting groove; 5. a sealing structure; 51. a primary seal ring; 52. a secondary seal ring; 53. a third-stage sealing ring; 6. a valve core.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a reversing valve body of a multi-way reversing valve for a forklift. Referring to fig. 2, the reversing valve body of the multi-way reversing valve for the forklift includes a valve block 41, a connecting boss 42 and a positioning boss 43, wherein the connecting boss 42 is integrally formed at the middle portions of two side walls in the length direction of the valve block 41. Positioning projections 43 are integrally formed at four corners of the end surface of the valve block 41 near each of the connecting bosses 42. The end face of each positioning projection 43 remote from the valve block 41 is flush with the end face of the connecting boss 42 remote from the valve block 41. When two adjacent reversing valve bodies 4 are connected, the connecting bosses 42 and the positioning lugs 43 which are close to each other on the two reversing valve bodies 4 are aligned and attached.

Referring to fig. 2, a connection hole 44 through which a fastening bolt passes is formed in the connection boss 42, the connection hole 44 includes a first connection through hole 441 and two second connection through holes 442, the first connection through hole 441 is formed in the middle of the top end of the connection boss 42, the second connection through holes 442 are formed in the two ends of the connection boss 42, which are far away from the first connection through hole 441, and a connection line between the centers of the first connection through hole 441 and the two second connection through holes 442 is an isosceles triangle. When two adjacent reversing valve bodies 4 are connected, fastening bolts are inserted into the first connecting through hole 441 and the second connecting through hole 442 and locked and fixed.

Referring to fig. 2, each of the connection bosses 42 is provided with an oil passage port 45 through which hydraulic oil flows, and the oil passage port 45 includes an oil inlet 451, an unloading port 453, and an oil return port 452. The oil inlet 451, the unloading oil port 453 and the oil return port 452 are all communicated with an oil path in the valve block 41. An unloading groove 454 is formed in the end face, close to the unloading port 453, of the connecting boss 42, and the unloading groove 454 is formed in two opposite edges of the unloading port 453, so that the unloading effect is improved. The connecting boss 42 is provided with a check valve mounting groove 46, and the bottom of the check valve mounting groove 46 is communicated with an oil path in the valve block 41.

Referring to fig. 2 and 3, the sealing structure 5 is disposed on the outer side of the connection boss 42 near the oil through port 45, and the sealing structure 5 includes a primary sealing ring 51, a secondary sealing ring 52, and a tertiary sealing ring 53. The outer sides of the oil inlet 451, the unloading oil port 453 and the oil return port 452 are respectively provided with a secondary sealing groove 422, and each secondary sealing groove 422 is similar to the shape of the corresponding oil inlet 451, the unloading oil port 453 and the oil return port 452. The secondary sealing ring 52 is clamped in each secondary sealing groove 422, and the diameter of the secondary sealing ring 52 is larger than the groove depth of the secondary sealing groove 422. Tertiary sealing groove 423 is opened in the outside of check valve mounting groove 46, and tertiary sealing washer 53 joint is in tertiary sealing groove 423. The connecting boss 42 is further provided with a circular first-stage sealing groove 421, and each second-stage sealing groove 422 and third-stage sealing groove 423 are located in an area surrounded by the first-stage sealing groove 421. The primary sealing ring 51 is clamped in the primary sealing groove 421, and the diameter of the primary sealing ring 51 is larger than the groove depth of the primary sealing groove 421.

The implementation principle of the reversing valve body of the multi-way reversing valve for the forklift in the embodiment of the application is as follows: when the connection between two adjacent direction valve bodies 4 is performed, the adjacent direction valve bodies 4 are fixed by inserting fastening bolts into the connection holes 44 and locking the fastening bolts. The staff judges whether the reversing valve bodies 4 are aligned or not by observing the relative positions of the positioning lugs 43 of the adjacent reversing valve bodies 4, and carries out corresponding adjustment, thereby facilitating the installation and positioning of the reversing valve bodies 4 and improving the installation accuracy of the reversing valve bodies 4. And the sealing structure 5 seals the outer side of the oil passing port 45 between the two adjacent reversing valve bodies 4, so that the possibility of leakage of hydraulic oil at the oil passing port 45 is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a switching-over valve body of fork truck is with multichannel switching-over valve which characterized in that: including valve block (41) and connection boss (42), connection boss (42) integrated into one piece in the middle part of the relative both sides wall in valve block (41) length direction, set up connecting hole (44) that supply fastening bolt to pass on connecting boss (42), each valve block (41) are close to four edge homogeneous body shaping of the terminal surface of each connection boss (42) and have location lug (43), each the terminal surface that keeps away from valve block (41) of location lug (43) is with the terminal surface looks parallel and level that the connection lug kept away from valve block (41).

2. The reversing valve body of the multi-way reversing valve for the forklift as recited in claim 1, wherein: each connecting boss (42) is provided with an oil passing port (45) for the flowing of hydraulic oil, the oil passing port (45) is communicated with an oil way in the valve block (41), and the outer side of the connecting boss (42) close to the oil passing port (45) is provided with a sealing structure (5).

3. The reversing valve body of the multi-way reversing valve for the forklift as recited in claim 2, wherein: cross hydraulic fluid port (45) and include oil inlet (451), off-load hydraulic fluid port (453) and oil return opening (452), connect and seted up circular shape one-level sealed slot (421) on boss (42), seal structure (5) include one-level sealing washer (51), one-level sealing washer (51) joint is in one-level sealed slot (421), oil inlet (451), off-load hydraulic fluid port (453) and oil return opening (452) all are located the region that one-level sealed slot (421) enclose, the diameter of one-level sealing washer (51) is greater than the groove depth of one-level sealed slot (421).

4. The reversing valve body of the multi-way reversing valve for the forklift as recited in claim 3, wherein: the oil inlet (451), the unloading oil port (453) and the oil return port (452) are all provided with a secondary sealing groove (422), the sealing structure (5) further comprises three secondary sealing rings (52), the three secondary sealing rings (52) correspond to the oil inlet (451), the unloading oil port (453) and the oil return port (452) one by one, the secondary sealing rings (52) are clamped in the secondary sealing grooves (422), and the diameter of each secondary sealing ring (52) is larger than the depth of the secondary sealing groove (422).

5. The reversing valve body of the multi-way reversing valve for the forklift as recited in claim 3, wherein: the end face of the connecting boss (42) close to the edge of the unloading oil port (453) is provided with an unloading groove (454) in an outward expansion mode.

6. The reversing valve body of the multi-way reversing valve for the forklift as recited in claim 4, wherein: and a one-way valve mounting groove (46) is formed in the connecting boss (42), and the bottom of the one-way valve mounting groove (46) is communicated with an oil way in the valve block (41).

7. The reversing valve body of the multi-way reversing valve for the forklift as recited in claim 6, wherein: tertiary sealing groove (423) have been seted up in the outside of check valve mounting groove (46), tertiary sealing groove (423) are located one-level sealing groove (421) and enclose regional, it has tertiary sealing washer (53) to block in tertiary sealing groove (423), the diameter of tertiary sealing washer (53) is greater than the groove depth of tertiary sealing groove (423).

8. The reversing valve body of the multi-way reversing valve for the forklift as recited in claim 1, wherein: the connecting hole (44) comprises a first connecting through hole (441) and a second connecting through hole (442), the first connecting through hole (441) is located on one side of the connecting boss (42), the second connecting through hole (442) is located on one side, far away from the first connecting through hole (441), of the connecting boss (42), and a connecting line of centers of the first connecting through hole (441) and the two second connecting through holes (442) is in an isosceles triangle shape.