CN203009431U - Cushion valve for excavator motor - Google Patents

Cushion valve for excavator motor Download PDF

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Publication number
CN203009431U
CN203009431U CN 201220730169 CN201220730169U CN203009431U CN 203009431 U CN203009431 U CN 203009431U CN 201220730169 CN201220730169 CN 201220730169 CN 201220730169 U CN201220730169 U CN 201220730169U CN 203009431 U CN203009431 U CN 203009431U
Authority
CN
China
Prior art keywords
valve
spool
cylinder
room
valve core
Prior art date
Application number
CN 201220730169
Other languages
Chinese (zh)
Inventor
李小亮
丘伟平
徐强
Original Assignee
龙工(上海)桥箱有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 龙工(上海)桥箱有限公司 filed Critical 龙工(上海)桥箱有限公司
Priority to CN 201220730169 priority Critical patent/CN203009431U/en
Application granted granted Critical
Publication of CN203009431U publication Critical patent/CN203009431U/en

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Abstract

The utility model discloses a cushion valve for an excavator motor. The cushion valve for the excavator motor is characterized by comprising a valve shell body. A valve sleeve is arranged in the valve shell body, a plug is arranged at the back end of the interior of the valve sleeve, one end of the plug is connected with one end of the valve core seat, the valve core seat is arranged in a cavity of the valve sleeve, a cavity of the valve core seat is connected with one end of a valve core in a matching mode, a tapered valve core is arranged in a cavity at the other end of the valve core, an outer ring at one end of the valve core is matched with a cavity at the front end of the valve sleeve, the front end face of the valve sleeve is connected with a spring seat, a spring is arranged between the tapered valve core and the spring seat, and a valve seat is arranged at the front end of the cavity of the valve shell body. The cushion valve for the excavator motor has the advantages of being small in impact force, high in stability, capable of adjusting overflow pressure and the like.

Description

A kind of excavator motor trimmer valve

Technical field

The utility model relates to a kind of excavator motor trimmer valve, belongs to the oil hydraulic motor field.

Background technique

Trimmer valve is important constituent element in oil hydraulic motor, and its Main Function is the inner maximum pressure of restriction motor, the safety of protection oil hydraulic motor.The deficiency that the present trimmer valve that is used for the excavator motor mainly exists has: flooding process is large to the impact that motor produces, oil pressure relief can't be regulated, part processing precision is had relatively high expectations and unstable properties.

Summary of the invention

The purpose of this utility model is to solve the excavator motor with the impact that in the trimmer valve flooding process, motor is produced is large, oil pressure relief can't be regulated, part processing precision is had relatively high expectations and the problem of unstable properties, provide a kind of impact little, can regulate oil pressure relief, stable high excavator motor trimmer valve.

in order to achieve the above object, the utility model provides a kind of excavator motor trimmer valve, it is characterized in that, comprise valve chest, valve chest inside is provided with valve pocket, the rear end of valve pocket inside is provided with plug, plug one end is connected with an end of valve core case, valve core case is located in the valve pocket inner chamber, one end of the inner chamber of valve core case and spool is connected, be provided with poppet valve core in the inner chamber of the spool the other end, spool one end outer ring coordinates with valve pocket front end inner chamber, the front-end face of valve pocket is connected with spring seat, be provided with spring between described poppet valve core and spring seat, the inner chamber front end of described valve chest is provided with valve seat.

Preferably, the front end of described valve seat rear end and poppet valve core is connected, the first cylinder and the valve chest of poppet valve core are connected, the second cylinder of poppet valve core and the 3rd cylinder of spool are connected, the 4th cylinder of the 3rd cylinder and valve pocket is connected, and the 5th cylinder of spool and the 8th cylinder of valve pocket are connected, and the 7th cylinder and the valve core case of spool are connected, valve core case and the 8th cylinder are connected, and the rear end of valve pocket outside is provided with nut.

Preferably, be provided with the 3rd Room between described spool and valve core case, be provided with the second Room between spool and valve pocket, be provided with the first Room between spool and poppet valve core.

Preferably, connect by the second section discharge orifice on spool between described the second Room and the first Room, connect by the 3rd throttle orifice on spool between the first Room and the 3rd Room.

Preferably, described the first Room is connected with the inner chamber of poppet valve core, and the inner chamber of poppet valve core is connected by the inner chamber of first segment discharge orifice and valve seat.

Preferably, be provided with the second O-ring seals between described valve pocket and valve chest, be provided with the 3rd O-ring seals between valve pocket and plug.

Preferably, described valve chest is provided with at least two and flows back to oily endoporus, and the oil return endoporus comprises the first return opening and the second return opening.

The utility model is rational in infrastructure, part is easy to process, adopt the water chestnut linear sealing to make better tightness, guiding between each component connects makes each component of trimmer valve eccentric phenomena can not occur, be threaded connection between valve pocket and valve chest, realized the regulating of initial tension of spring, thereby realized regulating of oil pressure relief.The utility model is little to motor impact simultaneously, and stability is high, can protect better motor, extends motor life.

Description of drawings

Fig. 1 is the structural representation that a kind of excavator motor is used trimmer valve.

Description of reference numerals

1 is valve seat, 2 is valve chest, 3 is poppet valve core, 4 is spring, 5 is the first O-ring seals, 6 is spring seat, 7 is spool, 8 is valve pocket, 9 is valve core case, 10 is the second O-ring seals, 11 is plug, 12 is nut, 13 is the 3rd O-ring seals, 14 is conical surface, 15 is the first cylinder, 16 is the second cylinder, 17 is the 3rd cylinder, 18 is the 4th cylinder, 19 is the 5th cylinder, 20 is the 7th cylinder, 21 is the 8th cylinder, P is filler opening, T1 is the first return opening, T2 is the second return opening, b is the first segment discharge orifice, c is the second section discharge orifice, d is the 3rd throttle orifice, e is the first Room, f is the second Room, g is the 3rd Room.

Embodiment

For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.

Embodiment 1

The utility model is a kind of excavator motor trimmer valve, as shown in Figure 1, is the structural representation of a kind of excavator motor with trimmer valve.valve chest 2 inner chamber front ends arrange valve seat 1, conical surface 14 on valve seat 1 rear end and poppet valve core 3 front ends is connected, form sealing, the first cylinder 15 of poppet valve core 3 is connected with valve chest 2, the second cylinder 16 on poppet valve core 3 the other ends inserts in the 3rd cylinder 17 inner chambers of spool 7, spool 7 one end outer rings coordinate with valve pocket 8 front end inner chambers, be that spool 7 front end the 3rd cylinders 17 are connected with valve pocket 8 front end the 4th cylinders 18, spool 7 middle part the 5th cylinders 19 are connected with valve pocket 8 the 8th cylinder 21 inner chambers, spool 7 rear end the 7th cylinders 20 are connected with valve core case 9 inner chambers, valve core case 9 is located in valve pocket 8 inner chambers, and be connected with the 8th cylinder 21, valve core case 9 is fixed in valve pocket 8 inner chambers by plug 11 and the valve pocket 8 inner chamber limit dais terraces of valve pocket 8 interior afterbodys, plug 11 1 ends are connected with an end of valve core case 9, plug 11 is threaded connection in valve pocket 8 afterbodys with valve pocket 8, be provided with the 3rd O-ring seals 13 between valve pocket 8 and plug 11, valve pocket 8 front-end face linking springs seats 6, establish spring 4 between spring seat 6 and poppet valve core 3, the inner chamber front end of valve chest 2 is provided with valve seat 1.Valve chest 2 inside are equipped with valve pocket 8, valve pocket 8 is connected with valve chest 2 by screw thread, the second O-ring seals 10 is set between valve pocket 8 and valve chest 2, the rear end in valve pocket 8 outsides is provided with nut 12,12, valve pocket 8 and nut are threaded connection, valve chest 2 outsides are provided with screw thread whole trimmer valve are connected with motor, and the connecting thread rear end is provided with the first O-ring seals 5.

Be provided with the 3rd Room g between spool 7 and valve core case 9, be provided with the second Room f between spool 7 and valve pocket 8, be provided with the first Room e between spool 7 and poppet valve core 3.Connect by the second section discharge orifice c on spool 7 between the second Room f and the first Room e, connect by the 3rd throttle orifice d on spool 7 between the first Room e and the 3rd Room g.The first Room e is connected with the inner chamber of poppet valve core 3, and the inner chamber of poppet valve core 3 is connected by the inner chamber of first segment discharge orifice b and valve seat 1.

Valve chest 2 is provided with at least two and flows back to oily endoporus, and the oil return endoporus comprises the first oil return inlet T 1 and the second oil return inlet T 2.

In the present embodiment, have 2 rows totally 10 return openings (wherein the T1 mouth is 6,4, T2 mouth) on valve chest 2.

Poppet valve core 3 has designed three sections different-diameter outer cylindrical body and a conical surface 14, wherein conical surface 14 forms the line style sealing with valve seat 1 rear end inner chamber, front end the first cylinder 15 coordinates with the inner chamber of valve chest 2, rear end the second cylinder 16 coordinates with the 3rd cylinder 17 inner chambers of spool 7, this two place coordinates, make poppet valve core 3 coaxial with whole trimmer valve, and deflection can not occur in valve chest 2, simultaneously, rear end 16 pairs of springs 4 of the second cylinder of poppet valve core 3 play the guiding role, and guarantee that spring 4 is flexible in same rectilinear direction.Poppet valve core 3 inside also are provided with first segment discharge orifice b oil inlet P are communicated with the first Room e.

Spool 7 is designed with three sections different-diameter cylinders and two throttle orifices, and wherein the 3rd cylinder 17 inner chambers coordinate with poppet valve core 3 rear end the second cylinders 16, and the 3rd cylinder 17 outer rings coordinate with the 4th cylinder 18 inner chambers of valve pocket 8; Middle part the 5th cylinder 19 coordinates with the 8th cylinder 21 inner chambers of valve pocket 8; Rear end the 7th cylinder 20 coordinates with valve core case 9 inner chambers, and this three place guiding type coordinates makes spool 7 coaxial and deflection can not occur with whole trimmer valve.Have second section discharge orifice c on the 3rd cylinder 17 of spool 7, the first Room e is communicated with the second Room f, the 7th cylinder 20 is provided with the 3rd throttle orifice d the first Room e the 3rd Room g is communicated with.

Be designed with three sections different screw threads on valve pocket 8, rear end outside thread attaching nut 12 wherein, the rear end internal thread connects plug 11, and the 3rd O-ring seals 13 is set for sealing between valve pocket 8 and plug 11, the outside thread of front end is connected to valve chest 2 with valve pocket 8, by regulating the relative position of this connecting thread controllable valve cover 8 and valve chest 2, thereby changes the position of spring seat 6, and then the length of change spring 4, realize regulating of oil pressure relief.

during trimmer valve work, oil inlet P flows through pressure oil, the pressure that produces in oil inlet P when fluid is during with spring 4 setting equilibrium of forces, poppet valve core 3 begins action, trimmer valve is opened, afterwards, along with pressure oil flows into the first Room e by first segment discharge orifice b, flow to the second Room f by second section discharge orifice c respectively again, the 3rd throttle orifice d flows into the 3rd Room g, fluid forms high pressure in the 3rd Room g inner accumulated, spool 7 beginnings under pressure slowly move forward and promote spring seat 6 and move forward (this moment, the second Room f played damping function), spring seat 6 also promotes spring 4 in a mobile end moves, spring 4 shorten lengths, load on spring 4 increases, trimmer valve pressure raises, can't continue to move when pressure continuation rising spool 7 moves forward the endoporus step surface that arrives valve pocket 8, it is maximum that spring 4 loads reach, and the pressure of trimmer valve also reached maximum and remained on this force value this moment, when the oil inlet P oil pressure descended, poppet valve core 3 moved forward with valve seat 1 and contacts under spring-force driven dual, and trimmer valve cuts out, and spring seat 6 is also got back to original position with spool 7.

Claims (7)

1. excavator motor trimmer valve, it is characterized in that, comprise valve chest (2), valve chest (2) inside is provided with valve pocket (8), the inner rear end of valve pocket (8) is provided with plug (11), plug (11) one ends are connected with an end of valve core case (9), valve core case (9) is located in valve pocket (8) inner chamber, one end of the inner chamber of valve core case (9) and spool (7) is connected, be provided with poppet valve core (3) in the inner chamber of spool (7) the other end, spool (7) one end outer rings coordinate with valve pocket (8) front end inner chamber, the front-end face of valve pocket (8) is connected with spring seat (6), be provided with spring (4) between described poppet valve core (3) and spring seat (6), the inner chamber front end of described valve chest (2) is provided with valve seat (1).
2. a kind of excavator motor trimmer valve as claimed in claim 1, it is characterized in that, the front end of described valve seat (1) rear end and poppet valve core (3) is connected, first cylinder (15) of poppet valve core (3) is connected with valve chest (2), second cylinder (16) of poppet valve core (3) is connected with the 3rd cylinder (17) of spool (7), the 3rd cylinder (17) is connected with the 4th cylinder (18) of valve pocket (8), the 5th cylinder (19) of spool (7) is connected with the 8th cylinder (21) of valve pocket (8), the 7th cylinder (20) of spool (7) is connected with valve core case (9), valve core case (9) is connected with the 8th cylinder (21), the outside rear end of valve pocket (8) is provided with nut (12).
3. a kind of excavator motor trimmer valve as claimed in claim 1 or 2, it is characterized in that, be provided with the 3rd Room (g) between described spool (7) and valve core case (9), be provided with the second Room (f) between spool (7) and valve pocket (8), be provided with the first Room (e) between spool (7) and poppet valve core (3).
4. a kind of excavator motor trimmer valve as claimed in claim 3, it is characterized in that, connect by the second section discharge orifice (c) on spool (7) between described the second Room (f) and the first Room (e), connect by the 3rd throttle orifice (d) on spool (7) between the first Room (e) and the 3rd Room (g).
5. a kind of excavator motor trimmer valve as claimed in claim 4, it is characterized in that, described the first Room (e) is connected with the inner chamber of poppet valve core (3), and the inner chamber of poppet valve core (3) is connected by first segment discharge orifice (b) and the inner chamber of valve seat (1).
6. a kind of excavator motor trimmer valve as claimed in claim 1 or 2, it is characterized in that, be provided with the second O-ring seals (10) between described valve pocket (8) and valve chest (2), be provided with the 3rd O-ring seals (13) between valve pocket (8) and plug (11).
7. a kind of excavator motor trimmer valve as claimed in claim 1 or 2, is characterized in that, described valve chest (2) is provided with at least two and flows back to oily endoporus, and the oil return endoporus comprises the first return opening (T1) and the second return opening (T2).
CN 201220730169 2012-12-26 2012-12-26 Cushion valve for excavator motor CN203009431U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220730169 CN203009431U (en) 2012-12-26 2012-12-26 Cushion valve for excavator motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220730169 CN203009431U (en) 2012-12-26 2012-12-26 Cushion valve for excavator motor

Publications (1)

Publication Number Publication Date
CN203009431U true CN203009431U (en) 2013-06-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220730169 CN203009431U (en) 2012-12-26 2012-12-26 Cushion valve for excavator motor

Country Status (1)

Country Link
CN (1) CN203009431U (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103697019A (en) * 2013-12-27 2014-04-02 龙工(上海)精工液压有限公司 Safety valve for motor of excavator
CN104930004A (en) * 2015-05-27 2015-09-23 北京航天发射技术研究所 Unidirectional ventilation and reverse overpressure release available cushion valve
CN105697832A (en) * 2016-04-19 2016-06-22 龙工(上海)精工液压有限公司 Safety valve with buffer performance
CN109026889A (en) * 2018-10-18 2018-12-18 宁波文泽机电技术开发有限公司 Buffer overflow valve
CN109162977A (en) * 2018-10-19 2019-01-08 宁波文泽机电技术开发有限公司 Rotary buffering valve
CN109237056A (en) * 2018-10-25 2019-01-18 太重集团榆次液压工业有限公司 A kind of plug-in precompression valve

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103697019A (en) * 2013-12-27 2014-04-02 龙工(上海)精工液压有限公司 Safety valve for motor of excavator
CN104930004A (en) * 2015-05-27 2015-09-23 北京航天发射技术研究所 Unidirectional ventilation and reverse overpressure release available cushion valve
CN104930004B (en) * 2015-05-27 2017-01-25 北京航天发射技术研究所 Unidirectional ventilation and reverse overpressure release available cushion valve
CN105697832A (en) * 2016-04-19 2016-06-22 龙工(上海)精工液压有限公司 Safety valve with buffer performance
CN109026889A (en) * 2018-10-18 2018-12-18 宁波文泽机电技术开发有限公司 Buffer overflow valve
CN109162977A (en) * 2018-10-19 2019-01-08 宁波文泽机电技术开发有限公司 Rotary buffering valve
CN109162977B (en) * 2018-10-19 2020-08-28 湖北江威智能汽车股份有限公司 Rotary cushion valve
CN109237056A (en) * 2018-10-25 2019-01-18 太重集团榆次液压工业有限公司 A kind of plug-in precompression valve

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