CN209381980U - Agricultural traction engine trailer Piston Pneumatic Brake Valve assembly - Google Patents

Agricultural traction engine trailer Piston Pneumatic Brake Valve assembly Download PDF

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Publication number
CN209381980U
CN209381980U CN201822116423.6U CN201822116423U CN209381980U CN 209381980 U CN209381980 U CN 209381980U CN 201822116423 U CN201822116423 U CN 201822116423U CN 209381980 U CN209381980 U CN 209381980U
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China
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assembly
light switch
brake
lower case
valve
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Expired - Fee Related
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CN201822116423.6U
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Chinese (zh)
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马恩
马宇骋
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Nanyang Institute of Technology
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Nanyang Institute of Technology
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Abstract

Agricultural traction engine trailer Piston Pneumatic Brake Valve assembly, comprising: upper housing assembly, brake piston assembly, braking light switch assembly, lower case assembly；Upper housing assembly is spirally connected with lower case assembly；Lower case assembly upper end and the lower end of upper housing are in sealing contact；Brake piston assembly is mounted on inside upper housing assembly and lower case assembly；Braking light switch assembly is mounted on outside lower case assembly and connect with lower case, and is arranged vertically in same level with second pressure sensor unit and air brake valve outlet plug screw；Second pressure sensor unit and air brake valve outlet plug screw are arranged in air brake valve assembly two sides；Braking light switch assembly and the second overload valve chest are arranged in agricultural traction engine trailer Piston Pneumatic Brake Valve assembly two sides；First pressure sensor assembly and the first overload valve chest are arranged in air brake valve assembly two sides.The assembly structure is compact, good seal performance, and static characteristic and dynamic characteristic performance are effectively improved.

Description

Agricultural traction engine trailer Piston Pneumatic Brake Valve assembly
Technical field
The utility model belongs to agricultural traction engine field, is related to a kind of agricultural traction engine trailer air brake valve assembly, especially It is related to a kind of agricultural traction engine trailer Piston Pneumatic Brake Valve assembly.
Background technique
Currently, the agricultural traction engine trailer braking protection valve system produced both at home and abroad, is mostly manual machine braking system or Manual hydraulic Braking system, driver's large labor intensity in braking, is easy fatigue；Also there is small part using straight air brake system.The present inventor in 2 months 2013 patents of invention filed in 16 days " Air brake valve for trailer of tractor 201310050637.7 " and apply on the same day practical New patent " Air brake valve for trailer of tractor 201320072580.6 " is using piston spring formula air brake valve.Its deficiency Locate as follows: after assembling parts are inserted into connecting plate at air brake valve assembly and by air brake valve assembly, then being mounted on tractor When, assembly technology is still more complicated；Push rod is only a part, although being simple to manufacture, is pre-tightened to balancing spring assembly Power is not adjustable, therefore minimum equilibrium air pressure is larger, so that trackability range becomes smaller；Exhaust noise is bigger；Because using O shape Sealing ring carries out dynamic sealing, so sealing performance is restricted by the processing quality, assembling quality and use environment of contact surface, sealing Performance is undesirable；Cathode stud and the assembly of negative spring piece in braking light switch assembly, manufacturing process are complicated；High pressure gas is defeated Enter chamber and high pressure gas output cavity is not provided with pressure sensor, control precision is not high；High pressure gas input cavity and high pressure gas Output cavity is not provided with pressure overload valve, air brake valve poor stop.Hair filed in the present inventor on December 12nd, 2014 Bright patent " three-wheeled motor car air brake valve 201410758529.X " and the utility model patent applied on the same day " three-wheeled motor car gas braking Valve 201420779536.3 " is using diagraph spring pneumatic brake valve.Its shortcoming is as follows: assembling parts are braked at gas Valve assembly and when being mounted on air brake valve assembly on three-wheeled motor car, assembly technology is still more complicated；Only one equilibrium bomb Spring, although push rod and pre-tightening apparatus assembly have pretightning force regulatory function, the minimum equilibrium air pressure that obtains or bigger, Trackability range is less big, and braking ability improves undesirable；Brake pedal force reduces undesirable；Because brake piston uses Clearance seal, so sealing performance is restricted by the processing quality, assembling quality and use environment of contact surface, sealing performance is paid no attention to Think；Air-pressure brake lamp switch set assembling technology is complicated；120 ° of bumps of rotation are linked and packed technique after upper cover and lower case compress It is required that high, leakproofness is undesirable；A part of outer diameter is less than its bottom end outer diameter, intake and exhaust time among intake and exhaust spool lower valve core Shorten unobvious, the dynamic characteristic performance of air brake valve improves unobvious.
Therefore, develop it is a kind of it is compact-sized, connection type is reasonable, can fast implement dismounting, intake and exhaust spool is integrated, Good combination property, control precision be high, safe and reliable agricultural traction engine trailer Piston Pneumatic Brake Valve assembly, will be by The favor of users.Verification experimental verification, the agricultural traction engine trailer Piston Pneumatic Brake Valve assembly that we develop have structure conjunction It the advantages that reason, static characteristic and dynamic characteristic are good when braking, it is high, multiple functional to control precision, good combination property, is applicable in completely In on agricultural traction engine air braking system.
Utility model content
The purpose of this utility model is to provide a kind of multiple functional, compact-sized, connection types rationally, comprehensive performance Good, static characteristic and dynamic characteristic are good when braking, control precision is high, sealing and braking ability are good, and convenient for disassembly and assembly and use can The agricultural traction engine trailer Piston Pneumatic Brake Valve assembly leaned on.
The technical solution of the utility model is: agricultural traction engine trailer Piston Pneumatic Brake Valve assembly, comprising: upper housing is total At, brake piston assembly, braking light switch assembly, lower case assembly；Upper housing assembly passes through the upper housing in upper housing assembly Lower end pass sequentially through the upper end of bolt, spring washer, plain washer and the lower case in lower case assembly and be spirally connected；Lower case assembly In O-ring seals the upper end of lower case is set；The upper end of lower case is connect by the sealing of the lower end of O-ring seals and upper housing Touching；Brake piston assembly is mounted on inside upper housing assembly and lower case assembly；It is total that braking light switch assembly is mounted on lower case At outside, connect by the first combination sealing washer in braking light switch assembly with lower case, and in brake piston assembly Second pressure sensor unit and brake piston assembly in air brake valve outlet plug screw be arranged vertically in same level； It is total that second pressure sensor unit and air brake valve outlet plug screw are arranged in agricultural traction engine trailer Piston Pneumatic Brake Valve At two sides；The second overload valve chest in braking light switch assembly and brake piston assembly is arranged in agricultural traction engine trailer Piston Pneumatic Brake Valve assembly two sides；The first mistake in first pressure sensor assembly and lower case assembly in lower case assembly It carries valve chest and is arranged in agricultural traction engine trailer Piston Pneumatic Brake Valve assembly two sides.
The upper housing assembly, comprising: small balancing spring pre-tighten screw rod, brake pushrod, upper housing, big balancing spring, Small balancing spring, the 4th star sealing ring, the second shackle, third muffler ASSY；Divide in brake pushrod vertical central lines It is not provided with a threaded hole and a cylindrical hole, threaded hole is coaxial with cylindrical hole；Brake pushrod lower end cylindrical hole and small balance Spring pre-tightening screw rod cylindrical body matches；Brake pushrod lower end cylindrical hole matches with small balancing spring outer diameter；Small balancing spring It is tangent to be inserted into brake pushrod lower end cylindrical hole inside, small balancing spring upper surface pre-tightens screw rod lower end surface with small balancing spring and connects Touching；Small balancing spring lower end surface is contacted with the brake piston upper end cylindrical hole bottom end face in brake piston assembly；Brake pushrod Threaded upper ends Kong Yu little balancing spring pre-tightens screw rod threaded upper ends cylindrical body and matches；Brake pushrod threaded upper ends are provided in hole One ring groove；Second shackle is mounted in the ring groove of brake pushrod threaded upper ends hole；Setting outside brake pushrod There is the vertical cylinder body of three sections of coaxial different-diameters, wherein middle section cylinder diameter is greater than upper section cylinder diameter, upper section cylinder Body diameter is greater than lower section cylinder diameter；Brake pushrod upper end is stretched out from upper housing upper end center hole, brake pushrod middle section cylinder Body upper surface and upper housing interior lower end face contact；Brake pushrod lower section cylindrical body matches with big balancing spring internal diameter；Braking Push rod lower section cylindrical body is inserted into tangent on the inside of big balancing spring, middle section cylindrical body lower end surface and big balancing spring upper end face contact； Big balancing spring lower end surface is contacted with the brake piston upper end ring-shaped cylinder blind via bottom end face in brake piston assembly；Small balance There are two the cylindrical bodies of coaxial different-diameter, upper end cylinder diameter to be less than lower end cylindrical body for setting outside spring pre-tightening screw rod Diameter；Small balancing spring pre-tightens and is provided with screw thread on the cylindrical body of screw rod upper end；Small balancing spring pre-tightens screw rod upper end outer horizontal A linear type groove is provided on section；Small balancing spring pre-tightens screw rod upper end and passes through brake pushrod lower end cylindrical hole from upper end Threaded hole bottom screws in, with end in contact under the second shackle；Coaxial circles post holes there are two settings in upper housing vertical central lines, Upper end cylinder bore diameter is less than lower end cylinder bore diameter；An o-ring groove is provided in the cylindrical hole of upper housing upper end；4th Star sealing ring is mounted in the cylindrical hole o-ring groove of upper housing upper end；Brake pushrod passes through the 4th star sealing ring and upper casing Body is in sealing contact；A horizontal threaded bore is provided in the middle part of upper housing；There are three coaxial different-diameters for setting outside upper housing Cylindrical body, middle part cylindrical body vertically be evenly distributed with three cylindrical holes, lower end cylindrical body vertically be evenly distributed with six cylindrical holes；In the middle part of upper housing Cylindrical body lower end is evenly distributed with three triangle reinforcing ribs；Third muffler ASSY is mounted on the horizontal threaded bore in the middle part of upper housing； In brake piston upper end insertion upper housing lower end cylindrical hole in brake piston assembly；Upper housing passes through in brake piston assembly The third star sealing ring in the second star sealing ring, brake piston assembly in first star sealing ring, brake piston assembly It is in sealing contact with brake piston；Upper housing lower end cylindrical body passes sequentially through in bolt, spring washer, plain washer and lower case assembly Lower case upper end cylindrical body be spirally connected；The lower end surface of upper housing lower end cylindrical body by O-ring seals in lower case assembly with The upper surface of lower case upper end cylindrical body is in sealing contact；Cylindrical body passes sequentially through bolt, spring washer, plain washer in the middle part of upper housing It is connect with dilatory machine bottom board.
The brake piston assembly, comprising: the first star sealing ring, the second star sealing ring, third star sealing ring, Second muffler ASSY, the second poppet valve core, the second overload valve chest, the second overload valve spring, the second overload valve pressure regulation bar, second Locking nut, the 5th combination sealing washer, brake piston return spring, brake piston, the 6th combination sealing washer, second pressure Sensor unit, air brake valve outlet plug screw, the 7th combination sealing washer；Two are respectively arranged in brake piston vertical central lines A cylindrical hole and a ring-shaped cylinder blind hole, two cylindrical holes and a ring-shaped cylinder blind hole are coaxial；Brake piston upper end annular Cylinder blind hole diameter is greater than upper end cylinder bore diameter；Upper end cylinder bore diameter is greater than lower end cylinder bore diameter；Brake piston upper end Ring-shaped cylinder blind hole matches with the big balancing spring outer diameter in upper housing assembly；Big balancing spring is inserted into brake piston top ring Tangent on the inside of shape cylinder blind hole, big balancing spring lower end surface is contacted with brake piston upper end ring-shaped cylinder blind via bottom end face；System Piston upper end cylindrical hole matches with the small balancing spring outer diameter in upper housing assembly；On small balancing spring insertion brake piston Hold cylindrical hole inside tangent, small balancing spring lower end surface is contacted with brake piston upper end cylindrical hole bottom end face；Outside brake piston Portion is provided with the vertical cylinder body of three sections of coaxial different-diameters, and wherein upper section cylinder diameter is greater than middle section cylinder diameter, Middle section cylinder diameter is greater than lower section cylinder diameter；There are three uniformly distributed sealing rings for the setting of brake piston upper section cylindrical outer Groove；First star sealing ring, the second star sealing ring, third star sealing ring are sequentially arranged at brake piston upper section cylindrical body In external o-ring groove；In the upper housing and lower case assembly in piston insertion upper housing assembly in brake piston upper end Lower housing cavity；Inner hole among core bar insertion lower case in brake piston lower end；Core bar excircle in brake piston lower end Gap between lower case inner periphery is communicated with air brake valve outlet plug screw；Core bar inner hole and upper casing in brake piston lower end Third muffler ASSY in body assembly communicates；Piston upper surface in brake piston upper end is in air brake valve third always and disappears Below sound device assembly；Brake piston middle section cylindrical body matches with brake piston return spring internal diameter；Brake piston return spring It is inserted into tangent on the outside of the cylindrical body of brake piston middle section；Brake piston return spring upper surface and brake piston upper section cylindrical body lower end Face contact；Brake piston return spring lower end surface, with the lower case upper end ring-shaped cylinder blind via bottom end face in lower case assembly Contact；The setting of second overload valve hull outside is there are two the cylindrical body of coaxial different-diameter, and wherein left end cylinder diameter is small In right end cylinder diameter；Screw thread is provided on second overload valve chest left end cylindrical body；Second overload valve chest left end cylinder The body bottom of thread is provided with a ring groove；There are two second overload valve chest right end cylindrical body the right settings and axial line pair The horizontal groove of title；The cylindrical hole there are two coaxial different-diameter is respectively set on second overload valve chest horizontal axis line, Wherein left end cylinder bore diameter is less than right end cylinder bore diameter；Screw thread is provided in second overload valve chest right end cylindrical hole；The The two overload valve chest right end cylindrical body left sides are provided with a threaded hole vertically downward；Second overload valve chest passes through left end circle Cylinder screw thread is connect with the lower case upper right end threaded hole in lower case assembly；Second overload valve chest is close by the 5th combination Seal washer is in sealing contact with lower case；Second muffler ASSY is by the second muffler ASSY threaded upper ends, with the second overload valve The threaded hole connection of the shell right end cylindrical body left side vertically downward；Second poppet valve core is provided with a cone and a cylinder Body, left end cone and right end cylindrical body are coaxial；Second poppet valve core left end cone maximum gauge is greater than right end cylinder diameter； The right end face contact of the circular conical surface of second poppet valve core left end cone and the second overload valve chest left end cylindrical hole；Second poppet valve core Right end cylindrical body matches with the second overload valve spring inside diameter；In second poppet valve core right end cylindrical body insertion the second overload valve spring Side is tangent；Second poppet valve core left end cone right side is contacted with the second overload valve spring left side；Second overload valve pressure regulation bar Left end is provided with a blind hole on axial line；Left end blind hole is overloaded outside valve spring with second on second overload valve pressure regulation bar axial line Diameter matches；Second overload valve spring is inserted into tangent on the inside of the blind hole of left end on the second overload valve pressure regulation bar axial line, the second overload Valve spring right side is contacted with left end blind via bottom end face on the second overload valve pressure regulation bar axial line；Second overload valve pressure regulation bar is left Screw thread is provided on the cylindrical body of end；Be provided with outside second overload valve pressure regulation bar right end a vertical cross-section be square it is rectangular Body；Second overload valve pressure regulation bar is connect by left end cylindrical body screw thread with the second overload valve chest right end threaded hole；Second overload Valve pressure regulation bar passes through the second locking nut and the second overload valve chest locking；Second pressure sensor unit is passed by second pressure The right end cylindrical body screw thread of sensor assembly is connect with lower case upper left end threaded hole；Second pressure sensor unit passes through the 6th Combination sealing washer and lower case are in sealing contact；Air brake valve outlet plug screw passes through the left end cylindrical body of air brake valve outlet plug screw Screw thread is connect with lower case upper right end threaded hole；Air brake valve outlet plug screw is close by the 7th combination sealing washer and lower case Sealing-in touching.
The braking light switch assembly, comprising: the first shackle, braking light switch adjust stud, braking light switch Electric installation, braking light switch conductive sheet, braking light switch cathode stud, braking light switch spring, braking light switch anode spiral shell Column, water proof and dust proof protective cover, braking light switch seat, the first combination sealing washer；It is provided with outside braking light switch cathode stud Two cylindrical bodies, left end cylinder diameter are greater than right end cylinder diameter；It is set on the cylindrical body of braking light switch cathode stud left end It is equipped with screw thread；There are two cylindrical bodies, left end cylinder diameter to be greater than right end cylindrical body for setting outside braking light switch anode stud Diameter；Screw thread is provided on the cylindrical body of braking light switch anode stud left end；Braking light switch cathode stud, braking light switch sun Pole stud is put into mold simultaneously, is molded by braking light switch seat by injection molding machine；After braking light switch seat injection molded, exist respectively It is installed on the threaded cylinder of braking light switch cathode stud left end and respectively on the threaded cylinder of braking light switch anode stud left end Two connection electric wire locking nuts；Water proof and dust proof protective cover is mounted on braking light switch seat；Braking light switch seat horizontal axis Right end is provided with a tapped blind hole on line；Braking light switch seat right end tapped blind hole bottom is provided with a cylinder boss；System Dynamic lamp switch seat right end tapped blind hole and cylinder boss are coaxial；A circle is provided on the right of braking light switch seat right end tapped blind hole Ring groove；Braking light switch seat right end tapped blind hole bottom cylinder boss matches with braking light switch spring inside diameter；Brake lamp Switch base right end tapped blind hole bottom cylinder boss is inserted into tangent on the inside of braking light switch spring；Braking light switch spring left side It is contacted with braking light switch seat right end tapped blind hole bottom end face；Be respectively arranged with outside braking light switch seat two cylindrical bodies and One hexagonal prism, two cylindrical bodies and a hexagonal prism are coaxial；The inscribed circle diameter of braking light switch seat hexagonal prism is greater than left end Cylinder diameter；Braking light switch seat left end cylinder diameter is greater than right end cylinder diameter；Braking light switch seat hexagonal prism two End is respectively arranged with a ring groove；Screw thread is provided on braking light switch seat right end cylindrical body；Braking light switch adjusts spiral shell Screw thread is provided on column cylindrical body；Braking light switch adjusts and is provided with a cylindrical hole on stud axial line；Braking light switch tune It saves stud cylindrical body and cylindrical hole is coaxial；Braking light switch adjusts stud right end and is provided with a "-" type groove；Brake lamp is opened Pass conductive sheet is equal thickness annular shape copper sheet；Braking light switch conductive sheet hot forming together with braking light switch electric installation； Two cylindrical bodies are respectively arranged with outside braking light switch electric installation, two cylindrical bodies are coaxial；Braking light switch electric installation Left end cylinder diameter is less than right end cylinder diameter；Braking light switch electric installation left end cylindrical body and braking light switch spring Internal diameter matches；Braking light switch electric installation left end cylindrical body is inserted into tangent on the inside of braking light switch spring；Braking light switch Spring right side and braking light switch electric installation right end cylindrical body left end face contact；Braking light switch adjusts stud and passes through screw thread It is connect with braking light switch seat；Braking light switch adjusts stud left side and braking light switch electric installation right end face contact；The One shackle is mounted in braking light switch seat right end tapped blind hole ring groove；First shackle left side and Brake lamp Switch-mode regulation stud right end face contact；Braking light switch seat passes through in the lower case in right end cylindrical body screw thread and lower case assembly The connection of portion left end threaded hole；Braking light switch seat is in sealing contact by the first combination sealing washer and lower case.
The lower case assembly, comprising: air inlet rubber valve, the second combination sealing washer, first pressure sensor are total At, lower case, air inlet rubber valve return spring, third combination sealing washer, air brake valve air inlet plug screw, the 4th combination sealing Washer, the first muffler ASSY, the first poppet valve core, the first overload valve chest, the first locking nut, the first overload valve spring, the One overload valve pressure regulation bar, O-ring seals；Lower case upper end is provided with an o-ring groove, is vertically evenly distributed with six threaded holes；Under A cylindrical hole and two ring-shaped cylinder blind holes, a cylindrical hole and two annular circles are respectively arranged in shell vertical central lines Column blind hole is coaxial；Lower case upper end ring-shaped cylinder blind hole diameter is greater than lower end ring-shaped cylinder blind hole diameter；Lower case lower end annular Cylinder blind hole diameter is greater than intermediate cylindrical bore dia；Lower case lower end ring-shaped cylinder blind hole lower part is provided with screw thread；In lower case Portion is arranged in same level is evenly distributed with threaded hole there are four horizontal；Lower case lower part is arranged there are two water in same level Average cloth threaded hole；Brake piston return bullet in lower case upper end ring-shaped cylinder blind hole mediate cylindrical and brake piston assembly Spring internal diameter matches；Lower case upper end ring-shaped cylinder blind hole mediate cylindrical is inserted into tangent on the inside of brake piston return spring；Under Shell upper end ring-shaped cylinder blind via bottom end face and brake piston return spring lower end face contact；O-ring seals are mounted on lower casing In the o-ring groove of body upper end；Lower case passes sequentially through the upper housing in bolt, spring shim, flat shim and upper housing assembly It is spirally connected；Lower case is in sealing contact by O-ring seals and upper housing；Lower case upper left end threaded hole is total by braking light switch The first combination sealing washer in, connect with the braking light switch seat in braking light switch assembly；Lower case upper right end spiral shell Pit is connect by the 5th combined seal ring in brake piston assembly with the second overload valve chest in brake piston assembly； Lower case upper back threaded hole is by the 6th combination sealing washer in brake piston assembly, with the in brake piston assembly The connection of two pressure transducer assemblies；Lower case upper front threaded hole passes through the 7th combination sealing pad in brake piston assembly Circle, connect with the air brake valve outlet plug screw in brake piston assembly；Lower case lower part left end threaded hole is close by the second combination Seal washer is connect with first pressure sensor assembly；Air inlet rubber valve is rubber parts, is disk at the top of air inlet rubber valve, Air inlet rubber valve lower edge round ring boss is lower than central circular boss；Air inlet rubber valve return spring upper end be inserted into In the annular groove of gas rubber valve lower end, and with cylindrical surface inscribe；Air inlet rubber valve return spring outer diameter and air brake valve Air inlet plug screw lower end cylindrical hole matches；Air inlet rubber valve return spring is inserted into the cylindrical hole of air brake valve air inlet plug screw lower end Side is tangent, air inlet rubber valve return spring lower end surface and air brake valve air inlet plug screw upper end face contact；Air brake valve air inlet spiral shell Plug is connect by third combination sealing washer with lower case；Air brake valve air inlet plug screw lower end is connect with high pressure admission pipeline；The There are two the cylindrical bodies of coaxial different-diameter for the setting of one overload valve hull outside, and wherein left end cylinder diameter is less than right end circle Column diameter；Screw thread is provided on first overload valve chest left end cylindrical body；First overload valve chest left end cylindrical body screw thread bottom Portion is provided with a ring groove；There are two first overload valve chest right end cylindrical body the right settings and the symmetrical level in axle center Groove；The cylindrical hole there are two coaxial different-diameter is respectively set on first overload valve chest horizontal axis line, wherein left end Cylinder bore diameter is less than right end cylinder bore diameter；Screw thread is provided in first overload valve chest right end cylindrical hole；First overload valve The shell right end cylindrical body left side is provided with a threaded hole vertically downward；First overload valve chest passes through left end cylindrical body screw thread It is connect with lower case lower part right end threaded hole；First overload valve chest is connect by the 4th combination sealing washer and lower case sealing Touching；First muffler ASSY is hung down by the first muffler ASSY threaded upper ends with the first overload valve chest right end cylindrical body left side Straight downward threaded hole connection；First poppet valve core is provided with a cone and a cylindrical body, left end cone and right end circle Cylinder is coaxial；First poppet valve core left end cone maximum gauge is greater than right end cylinder diameter；First poppet valve core left end cone Circular conical surface and first overload valve chest left end cylindrical hole right end face contact；First poppet valve core right end cylindrical body and the first overload Valve spring internal diameter matches；It is tangent on the inside of first poppet valve core right end cylindrical body insertion the first overload valve spring；First poppet valve core is left End cone right side is contacted with the first overload valve spring left side；Left end is provided with one on first overload valve pressure regulation bar axial line A blind hole；Left end blind hole matches with the first overload valve spring outer diameter on first overload valve pressure regulation bar axial line；First overload valve Spring is inserted into tangent on the inside of the blind hole of left end on the first overload valve pressure regulation bar axial line, the first overload valve spring right side and the first mistake Carry left end blind via bottom end face contact on valve pressure regulation bar axial line；Spiral shell is provided on first overload valve pressure regulation bar left end cylindrical body Line；The cuboid that a vertical cross-section is square is provided with outside first overload valve pressure regulation bar right end；First overload valve pressure regulation Bar is connect by left end cylindrical body screw thread with the first overload valve chest right end threaded hole；First overload valve pressure regulation bar passes through the first lock Tight nut and the first overload valve chest locking.
The good effect that the utility model generates afterwards by adopting the above technical scheme is: agricultural traction engine trailer piston type pneumatic system Dynamic valve assembly is compact-sized, connection type is reasonable, can fast implement dismounting, and intake and exhaust spool is integrated one by brake piston assembly Body, assembly is simple, control precision is high, ensure that agricultural traction engine trailer Piston Pneumatic Brake Valve assembly in installation and use with Upper housing assembly, lower case assembly, air inlet rubber valve, big balancing spring, small balancing spring, brake piston return spring are same Axis, sealing performance significantly improve, and static characteristic and the dynamic for improving agricultural traction engine trailer Piston Pneumatic Brake Valve assembly are special Property performance.
Detailed description of the invention
Fig. 1 is the front view structure schematic cross-sectional view of the utility model agricultural traction engine trailer Piston Pneumatic Brake Valve assembly；
Fig. 2 is the left view structural representation of the utility model agricultural traction engine trailer Piston Pneumatic Brake Valve assembly；
Fig. 3 is the right side structural representation of the utility model agricultural traction engine trailer Piston Pneumatic Brake Valve assembly；
Fig. 4 is the overlooking structure diagram of the utility model agricultural traction engine trailer Piston Pneumatic Brake Valve assembly；
Fig. 5 is the present invention looks up structural representation of the utility model agricultural traction engine trailer Piston Pneumatic Brake Valve assembly.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and embodiments.As shown in Fig. 1 ~ 5, agricultural traction engine Trailer Piston Pneumatic Brake Valve assembly mainly pre-tightens screw rod 2, brake pushrod 3, upper housing by upper housing assembly 1, small balancing spring 4, big balancing spring 5, small balancing spring 6, brake piston assembly 7, the first star sealing ring 8, the second star sealing ring 9, third Star sealing ring 10, the first shackle 11, braking light switch adjust stud 12, braking light switch electric installation 13, Brake lamp Conducting sheet of switch 14, braking light switch assembly 15, braking light switch cathode stud 16, braking light switch spring 17, Brake lamp are opened Close anode stud 18, water proof and dust proof protective cover 19, braking light switch seat 20, the first combination sealing washer 21, air inlet rubber valve 22, the second combination sealing washer 23, first pressure sensor assembly 24, lower case 25, air inlet rubber valve return spring 26, Three combination sealing washers 27, air brake valve air inlet plug screw 28, the 4th combination sealing washer 29, lower case assembly 30, first are eliminated the noise Device assembly 31, the first poppet valve core 32, first overload valve chest 33, the first locking nut 34, first overload valve spring 35, the first mistake Carry valve pressure regulation bar 36, the second muffler ASSY 37, the second poppet valve core 38, second overload valve chest 39, second overload valve spring 40, Second overload valve pressure regulation bar 41, the second locking nut 42, the 5th combination sealing washer 43, brake piston return spring 44, O shape are close Seal 45, brake piston 46, the 4th star sealing ring 47, the second shackle 48, the combination of third muffler ASSY the 49, the 6th are close Seal washer 50, second pressure sensor unit 51, air brake valve outlet plug screw 52, the 7th combination sealing washer 53 composition.
Upper housing assembly 1 passes sequentially through bolt, spring washer, plain cushion by the lower end of the upper housing 4 in upper housing assembly 1 It encloses and is spirally connected with the upper end of the lower case 25 in lower case assembly 30；O-ring seals 45 in lower case assembly 30 are arranged in lower casing The upper end of body 25；The upper end of lower case 25 is in sealing contact by O-ring seals 45 and the lower end of upper housing 4；Brake piston assembly 7 It is mounted on inside upper housing assembly 1 and lower case assembly 30；Braking light switch assembly 15 is mounted on outside lower case assembly 30, is led to The the first combination sealing washer 21 crossed in braking light switch assembly 15 is connect with lower case 25, and in brake piston assembly 7 Air brake valve outlet plug screw 52 in the second pressure sensor unit 51 and brake piston assembly 7 vertical cloth in same level It sets；Second pressure sensor unit 51 and air brake valve outlet plug screw 52 are arranged in agricultural traction engine trailer piston type pneumatic system Dynamic valve assembly two sides；The second overload valve chest 39 in braking light switch assembly 15 and brake piston assembly 7 is arranged in agriculture Industry tractor trailer Piston Pneumatic Brake Valve assembly two sides；First pressure sensor assembly 24 and lower casing in lower case assembly 30 The first overload valve chest 33 in body assembly 30 is arranged in agricultural traction engine trailer Piston Pneumatic Brake Valve assembly two sides.
A threaded hole and a cylindrical hole, threaded hole and cylindrical hole are respectively arranged in 3 vertical central lines of brake pushrod Coaxially；3 lower end cylindrical hole of brake pushrod pre-tightens 2 cylindrical body of screw rod with small balancing spring and matches；3 lower end cylindrical hole of brake pushrod Match with small 6 outer diameter of balancing spring；Small balancing spring 6 is inserted into tangent, small balancing spring on the inside of 3 lower end cylindrical hole of brake pushrod 6 upper surfaces and small balancing spring pre-tighten 2 lower end face contact of screw rod；System in small 6 lower end surface of balancing spring and brake piston assembly 7 The contact of 46 upper end cylindrical hole bottom end face of piston；3 threaded upper ends Kong Yu little balancing spring of brake pushrod pre-tightens 2 upper end spiral shell of screw rod Line cylindrical body matches；Brake pushrod is provided with a ring groove in 3 threaded upper ends hole；Second shackle 48 is mounted on system In dynamic 3 threaded upper ends hole ring groove of push rod；The vertical cylinder body of three sections of coaxial different-diameters is provided with outside brake pushrod 3, Wherein middle section cylinder diameter is greater than upper section cylinder diameter, and upper section cylinder diameter is greater than lower section cylinder diameter；Braking pushes away 3 upper end of bar is stretched out from 4 upper end center hole of upper housing, and 3 middle section cylindrical body upper surface of brake pushrod connects with 4 interior lower end face of upper housing Touching；3 lower section cylindrical body of brake pushrod matches with big 5 internal diameter of balancing spring；3 lower section cylindrical body of brake pushrod is inserted into big equilibrium bomb 5 inside of spring is tangent, middle section cylindrical body lower end surface and big 5 upper end face contact of balancing spring；Big 5 lower end surface of balancing spring and braking are lived Fill in 46 upper end ring-shaped cylinder blind via bottom end face of the brake piston contact in assembly 7；Small balancing spring pre-tightens to be arranged outside screw rod 2 There are two the cylindrical body of coaxial different-diameter, upper end cylinder diameter is less than lower end cylinder diameter；Small balancing spring pre-tightens Screw thread is provided on 2 upper end cylindrical body of screw rod；Small balancing spring pre-tightens and is provided with one one on 2 upper end outer horizontal section of screw rod Font groove；Small balancing spring pre-tightens 2 upper end of screw rod and screws in across 3 lower end cylindrical hole of brake pushrod from threaded upper ends hole bottom, With the lower end in contact of the second shackle 48；Small balancing spring pre-tightens screw rod 2 for pre-tightening small balancing spring 6, can improve braking Performance；There are two coaxial circles post holes for setting in 4 vertical central lines of upper housing, and it is straight that upper end cylinder bore diameter is less than lower end cylindrical hole Diameter；An o-ring groove is provided in 4 upper end cylindrical hole of upper housing；4th star sealing ring 47 is mounted on 4 upper end of upper housing In cylindrical hole o-ring groove；Brake pushrod 3 is in sealing contact by the 4th star sealing ring 47 and upper housing 4；4 middle part of upper housing It is provided with a horizontal threaded bore；Cylindrical body there are three coaxial different-diameter is set outside upper housing 4, and middle part cylindrical body hangs down Three cylindrical holes are directly evenly distributed with, lower end cylindrical body is vertically evenly distributed with six cylindrical holes；4 middle part cylindrical body lower end of upper housing is three three uniformly distributed Angular reinforcing rib；Third muffler ASSY 49 is mounted on the horizontal threaded bore at 4 middle part of upper housing；Third muffler ASSY 49 is used Exhaust noise when reducing or releasing braking, reduces environmental pollution；46 upper end of brake piston insertion in brake piston assembly 7 In 4 lower end cylindrical hole of upper housing；Upper housing 4 passes through the first star sealing ring 8, the brake piston assembly 7 in brake piston assembly 7 In the second star sealing ring 9, the third star sealing ring 10 in brake piston assembly 7 it is in sealing contact with brake piston 46；On 4 lower end cylindrical body of shell passes sequentially through the 25 upper end cylinder of lower case in bolt, spring washer, plain washer and lower case assembly 30 Body is spirally connected；The lower end surface of 4 lower end cylindrical body of upper housing passes through O-ring seals 45 and 25 upper end of lower case in lower case assembly 30 The upper surface of cylindrical body is in sealing contact；4 middle part cylindrical body of upper housing passes sequentially through bolt, spring washer, plain washer and tractor Bottom plate connection, it is easy to which ground realizes the fast assembling-disassembling of agricultural traction engine trailer Piston Pneumatic Brake Valve assembly.
Cylindrical hole and a ring-shaped cylinder blind hole there are two being respectively set in 46 vertical central lines of brake piston, two cylinders Kong Yuyi ring-shaped cylinder blind hole is coaxial；46 upper end ring-shaped cylinder blind hole diameter of brake piston is greater than upper end cylinder bore diameter；On Cylinder bore diameter is held to be greater than lower end cylinder bore diameter；46 upper end ring-shaped cylinder blind hole of brake piston with it is big in upper housing assembly 1 5 outer diameter of balancing spring matches；Big balancing spring 5 is inserted into tangent on the inside of 46 upper end ring-shaped cylinder blind hole of brake piston, big balance 5 lower end surface of spring is contacted with 46 upper end ring-shaped cylinder blind via bottom end face of brake piston；46 upper end cylindrical hole of brake piston with it is upper 6 outer diameter of small balancing spring in housing assembly 1 matches；Small balancing spring 6 is inserted into phase on the inside of 46 upper end cylindrical hole of brake piston It cuts, small 6 lower end surface of balancing spring is contacted with 46 upper end cylindrical hole bottom end face of brake piston；Three are provided with outside brake piston 46 The vertical cylinder body of the coaxial different-diameter of section, wherein upper section cylinder diameter is greater than middle section cylinder diameter, middle section cylindrical body Diameter is greater than lower section cylinder diameter；There are three uniformly distributed o-ring grooves for the setting of 46 upper section cylindrical outer of brake piston；The One star sealing ring 8, the second star sealing ring 9, third star sealing ring 10 are sequentially arranged at 46 upper section cylindrical body of brake piston In external o-ring groove；The upper housing 4 and lower case assembly in piston insertion upper housing assembly 1 in 46 upper end of brake piston 25 inner cavity of lower case in 30；Core bar in 46 lower end of brake piston is inserted into the intermediate inner hole of lower case 25；46 lower end of brake piston In 25 inner periphery of core bar excircle and lower case between gap communicated with air brake valve outlet plug screw 52；Under brake piston 46 Core bar inner hole in end is communicated with the third muffler ASSY 49 in upper housing assembly 1；On piston in 46 upper end of brake piston End face is in always below air brake valve third muffler ASSY 49；46 middle section cylindrical body of brake piston and brake piston return bullet 44 internal diameter of spring matches；Brake piston return spring 44 is inserted into tangent on the outside of 46 middle section cylindrical body of brake piston；Brake piston returns Position 44 upper surface of spring and 46 upper section cylindrical body lower end face contact of brake piston；44 lower end surface of brake piston return spring, under 25 upper end ring-shaped cylinder blind via bottom end face of lower case contact in housing assembly 30；Brake piston 46 integrates intake and exhaust spool One in installation and use with upper housing assembly 1, lower case assembly 30, big balancing spring 5, small balancing spring 6, brake piston Return spring 44 is coaxial, and sealing performance significantly improves, and improves the static characteristic and dynamic characteristic of air brake valve assembly；Second mistake Carrying setting outside valve chest 39, there are two the cylindrical bodies of coaxial different-diameter, and wherein left end cylinder diameter is less than right end cylinder Body diameter；Screw thread is provided on second overload 39 left end cylindrical body of valve chest；Second overload 39 left end cylindrical body screw thread of valve chest Bottom is provided with a ring groove；There are two symmetrical with axle center for setting on the right of second overload valve chest, 39 right end cylindrical body Horizontal groove；The cylindrical hole there are two coaxial different-diameter is respectively set on second overload 39 horizontal axis line of valve chest, Middle left end cylinder bore diameter is less than right end cylinder bore diameter；Screw thread is provided in second overload 39 right end cylindrical hole of valve chest；The The two overload 39 right end cylindrical body left sides of valve chest are provided with a threaded hole vertically downward；Second overload valve chest 39 passes through a left side End cylindrical body screw thread is connect with the 25 upper right end threaded hole of lower case in lower case assembly 30；Second overload valve chest 39 passes through 5th combination sealing washer 43 and lower case 25 are in sealing contact；Second muffler ASSY 37 passes through 37 upper end of the second muffler ASSY Screw thread is connect with the threaded hole of the second overload 39 right end cylindrical body left side of valve chest vertically downward；Second muffler ASSY 37 is used Exhaust noise when reducing output pressure overload, reduces environmental pollution；Second poppet valve core 38 is provided with a cone and one A cylindrical body, left end cone and right end cylindrical body are coaxial；Second poppet valve core, 38 left end cone maximum gauge is greater than right end circle Column diameter；The circular conical surface of second poppet valve core, 38 left end cone and the right side of the second overload 39 left end cylindrical hole of valve chest connect Touching；Second poppet valve core, 38 right end cylindrical body matches with the second overload 40 internal diameter of valve spring；Second poppet valve core, 38 right end cylindrical body 40 insides of insertion the second overload valve spring are tangent；Second poppet valve core, 38 left end cone right side and the second overload valve spring 40 are left End face contact；Left end is provided with a blind hole on second overload valve pressure regulation bar, 41 axial line；Second overload valve pressure regulation bar, 41 axle center Left end blind hole matches with the second overload 40 outer diameter of valve spring on line；Second overload valve spring 40 is inserted into the second overload valve pressure regulation bar It is tangent on the inside of the blind hole of left end on 41 axial lines, on the second overload 40 right side of valve spring and 41 axial line of the second overload valve pressure regulation bar The contact of left end blind via bottom end face；Screw thread is provided on second overload valve pressure regulation bar, 41 left end cylindrical body；Second overload valve pressure regulation The cuboid that a vertical cross-section is square is provided with outside 41 right end of bar；Second overload valve pressure regulation bar 41 passes through left end cylinder Body screw thread is connect with the second overload 39 right end threaded hole of valve chest；Second overload valve pressure regulation bar 41 by the second locking nut 42 with Second overload valve chest 39 is locked；Overload valve is limited for output high-pressure gas pressure, prevents from overloading；Second pressure sensor is total It is connect by the right end cylindrical body screw thread of second pressure sensor unit 51 with 25 upper left end threaded hole of lower case at 51；Second Pressure transducer assembly 51 is in sealing contact by the 6th combination sealing washer 50 and lower case 25；Second pressure sensor unit 51 Brake system control unit is fed back to for acquiring real-time pressure data；Air brake valve outlet plug screw 52 passes through air brake valve outlet The left end cylindrical body screw thread of plug screw 52 is connect with 25 upper right end threaded hole of lower case；Air brake valve outlet plug screw 52 passes through the 7th Combination sealing washer 53 and lower case 25 are in sealing contact.
There are two cylindrical bodies, left end cylinder diameter to be greater than right end cylindrical body for setting outside braking light switch cathode stud 16 Diameter；Screw thread is provided on 16 left end cylindrical body of braking light switch cathode stud；It is arranged outside braking light switch anode stud 18 There are two cylindrical body, left end cylinder diameter is greater than right end cylinder diameter；18 left end cylindrical body of braking light switch anode stud On be provided with screw thread；Braking light switch cathode stud 16, braking light switch anode stud 18 are put into mold simultaneously, by injection molding machine It is molded by braking light switch seat 20；After 20 injection molded of braking light switch seat, respectively in 16 left end of braking light switch cathode stud Two connection electric wire locking nuts are installed on threaded cylinder and respectively on 18 left end threaded cylinder of braking light switch anode stud； Water proof and dust proof protective cover 19 is mounted on braking light switch seat 20；Right end is provided with one on 20 horizontal axis line of braking light switch seat A tapped blind hole；20 right end tapped blind hole bottom of braking light switch seat is provided with a cylinder boss；Braking light switch seat 20 is right Hold tapped blind hole and cylinder boss coaxial；A ring groove is provided on the right of 20 right end tapped blind hole of braking light switch seat；System Dynamic 20 right end tapped blind hole bottom cylinder boss of lamp switch seat matches with 17 internal diameter of braking light switch spring；Braking light switch seat It is tangent that 20 right end tapped blind hole bottom cylinder boss are inserted into 17 inside of braking light switch spring；17 left side of braking light switch spring It is contacted with 20 right end tapped blind hole bottom end face of braking light switch seat；Two cylinders are respectively arranged with outside braking light switch seat 20 Body and a hexagonal prism, two cylindrical bodies and a hexagonal prism are coaxial；The inscribed circle diameter of 20 hexagonal prism of braking light switch seat is big In left end cylinder diameter；20 left end cylinder diameter of braking light switch seat is greater than right end cylinder diameter；Braking light switch seat 20 hexagonal prism both ends are respectively arranged with a ring groove；Screw thread is provided on 20 right end cylindrical body of braking light switch seat；Braking Lamp switch adjusts and is provided with screw thread on 12 cylindrical body of stud；Braking light switch adjusts and is provided with a cylinder on 12 axial line of stud Hole；Braking light switch adjusts 12 cylindrical body of stud and cylindrical hole is coaxial；Braking light switch adjusts 12 right end of stud and is provided with one "-" type groove；Braking light switch conductive sheet 14 is equal thickness annular shape copper sheet；Braking light switch conductive sheet 14 is opened with Brake lamp Close the hot forming together of electric installation 13；Two cylindrical bodies, two circles are respectively arranged with outside braking light switch electric installation 13 Cylinder is coaxial；13 left end cylinder diameter of braking light switch electric installation is less than right end cylinder diameter；Braking light switch is conductive 13 left end cylindrical body of device matches with 17 internal diameter of braking light switch spring；13 left end cylindrical body of braking light switch electric installation is inserted It is tangent to enter 17 inside of braking light switch spring；17 right side of braking light switch spring and 13 right end of braking light switch electric installation circle Cylinder left end face contact；Braking light switch adjusts stud 12 and is connect by screw thread with braking light switch seat 20；Braking light switch tune Save 12 left side of stud and 13 right end face contact of braking light switch electric installation；First shackle 11 is mounted on braking light switch In 20 right end tapped blind hole ring grooves of seat；First shackle, 11 left side adjusts 12 right side of stud with braking light switch and connects Touching；Braking light switch seat 20 is connected by the 25 upper left end threaded hole of lower case in right end cylindrical body screw thread and lower case assembly 30 It connects；Braking light switch seat 20 is in sealing contact by the first combination sealing washer 21 and lower case 25.
25 upper end of lower case is provided with an o-ring groove, is vertically evenly distributed with six threaded holes；25 vertical central of lower case A cylindrical hole and two ring-shaped cylinder blind holes are respectively arranged on line, a cylindrical hole and two ring-shaped cylinder blind holes are coaxial； 25 upper end ring-shaped cylinder blind hole diameter of lower case is greater than lower end ring-shaped cylinder blind hole diameter；25 lower end ring-shaped cylinder blind hole of lower case Diameter is greater than intermediate cylindrical bore dia；25 lower end ring-shaped cylinder blind hole lower part of lower case is provided with screw thread；25 top of lower case exists There are four horizontal uniformly distributed threaded holes for setting in same level；25 lower part of lower case is arranged that there are two horizontal in same level Uniformly distributed threaded hole；Brake piston return in 25 upper end ring-shaped cylinder blind hole mediate cylindrical of lower case and brake piston assembly 7 44 internal diameter of spring matches；25 upper end ring-shaped cylinder blind hole mediate cylindrical of lower case is inserted into 44 inside of brake piston return spring It is tangent；25 upper end ring-shaped cylinder blind via bottom end face of lower case and 44 lower end face contact of brake piston return spring；O-ring seals 45 are mounted in the o-ring groove of 25 upper end of lower case；Lower case 25 passes sequentially through bolt, spring shim, flat shim and upper casing Upper housing 4 in body assembly 1 is spirally connected；Lower case 25 is in sealing contact by O-ring seals 45 and upper housing 4；25 top of lower case Left end threaded hole is by the first combination sealing washer 21 in braking light switch assembly 15, with the system in braking light switch assembly 15 Dynamic lamp switch seat 20 connects；25 upper right end threaded hole of lower case passes through the 5th combined seal ring 43 in brake piston assembly 7, It is connect with the second overload valve chest 39 in brake piston assembly 7；25 upper back threaded hole of lower case is total by brake piston At the 6th combination sealing washer 50 in 7, it is connect with the second pressure sensor unit 51 in brake piston assembly 7；Lower case 25 upper front threaded holes are by the 7th combination sealing washer 53 in brake piston assembly 7, with the gas in brake piston assembly 7 Brake valve outlet plug screw 52 connects；25 lower part left end threaded hole of lower case is passed by the second combination sealing washer 23 with first pressure Sensor assembly 24 connects；First pressure sensor assembly 24 feeds back to braking system control list for acquiring real-time pressure data Member；Air inlet rubber valve 22 is rubber parts, is disk, 22 lower edge of air inlet rubber valve circle at the top of air inlet rubber valve 22 Annular convex platform is lower than central circular boss；The ring of 26 upper end of air inlet rubber valve return spring insertion 22 lower end of air inlet rubber valve In connected in star, and with cylindrical surface inscribe；26 outer diameter of air inlet rubber valve return spring and 28 lower end of air brake valve air inlet plug screw circle Post holes matches；It is tangent on the inside of 28 lower end cylindrical hole of the insertion of air inlet rubber valve return spring 26 air brake valve air inlet plug screw, into 26 lower end surface of gas rubber valve return spring and 28 upper end face contact of air brake valve air inlet plug screw；Air brake valve air inlet plug screw 28 is logical Third combination sealing washer 27 is crossed to connect with lower case 25；28 lower end of air brake valve air inlet plug screw is connect with high pressure admission pipeline； There are two the cylindrical bodies of coaxial different-diameter for setting outside first overload valve chest 33, and wherein left end cylinder diameter is less than the right side Hold cylinder diameter；Screw thread is provided on first overload 33 left end cylindrical body of valve chest；First overload 33 left end cylinder of valve chest The body bottom of thread is provided with a ring groove；There are two first overload valve chest, 33 right end cylindrical body the right settings and axial line Symmetrical horizontal groove；The cylinder there are two coaxial different-diameter is respectively set on first overload 33 horizontal axis line of valve chest Hole, wherein left end cylinder bore diameter is less than right end cylinder bore diameter；Spiral shell is provided in first overload 33 right end cylindrical hole of valve chest Line；The first overload 33 right end cylindrical body left side of valve chest is provided with a threaded hole vertically downward；First overload valve chest 33 It is connect by left end cylindrical body screw thread with 25 lower part right end threaded hole of lower case；First overload valve chest 33 is close by the 4th combination Seal washer 29 and lower case 25 are in sealing contact；First muffler ASSY 31 is by 31 threaded upper ends of the first muffler ASSY, with the The threaded hole connection of the one overload 33 right end cylindrical body left side of valve chest vertically downward；First muffler ASSY 31 is for reducing input Exhaust noise when pressure overload, reduces environmental pollution；First poppet valve core 32 is provided with a cone and a cylindrical body, left Hold cone and right end cylindrical body coaxial；First poppet valve core, 32 left end cone maximum gauge is greater than right end cylinder diameter；The The right end face contact of the circular conical surface of one poppet valve core, 32 left end cone and the first overload 33 left end cylindrical hole of valve chest；First cone valve 32 right end cylindrical body of core matches with the first overload 35 internal diameter of valve spring；The first overload of first poppet valve core, 32 right end cylindrical body insertion 35 inside of valve spring is tangent；First poppet valve core, 32 left end cone right side and the first overload 35 left end face contact of valve spring；The Left end is provided with a blind hole on one overload valve pressure regulation bar, 36 axial line；Left end blind hole on first overload valve pressure regulation bar, 36 axial line Match with the first overload 35 outer diameter of valve spring；First overload valve spring 35 is inserted into left on 36 axial line of the first overload valve pressure regulation bar Hold tangent on the inside of blind hole, left end blind via bottom on the first overload 35 right side of valve spring and 36 axial line of the first overload valve pressure regulation bar End face contact；Screw thread is provided on first overload valve pressure regulation bar, 36 left end cylindrical body；Outside first overload valve pressure regulation bar, 36 right end It is provided with the cuboid that a vertical cross-section is square；First overload valve pressure regulation bar 36 passes through left end cylindrical body screw thread and first Overload the connection of 33 right end threaded hole of valve chest；First overload valve pressure regulation bar 36 passes through the first locking nut 34 and the first overload valve casing Body 33 is locked, and overload valve prevents from overloading for inputting high-pressure gas pressure restriction.
Inlet seal performance test and admission pressure test it is as follows with admission pressure acquisition mode: 3 upper end of brake pushrod and Brake treadle mechanism contact；When brake pedal mechanism is not without braking by driver, brake pushrod 3 is not moved, at this time Inlet seal performance test can be carried out, the first overload valve pressure regulation bar 36 can also be carried out and adjust and limit input high pressure gas pressure Force value and first pressure sensor assembly 24 acquire real-time pressure data and feed back to brake system control unit.
When driver's brake pedal mechanism is braked, brake pushrod 3 moves downward while compressing big equilibrium bomb Spring 5 and small balancing spring 6, big balancing spring 5 and small balancing spring 6 push down on brake piston 46 simultaneously, brake piston 46 to Lower motion compresses brake piston return spring 44, the core bar in 46 lower end of brake piston, which moves downward, pushes air inlet rubber valve open 22, high pressure gas is exported by air brake valve outlet plug screw 52 and is braked to executive component；Meanwhile by air inlet rubber valve High pressure gas after 22 pushes braking light switch electric installation 13 to be moved to the left, braking light switch conductive sheet 14 and braking light switch Cathode stud 16 and braking light switch anode stud 18 contact, and Brake lamp is bright.
When driver loosens the brake mechanism releases braking, high pressure gas and brake piston return spring 44 push away simultaneously Dynamic brake piston 46 moves upwards, and brake piston 46 pushes big balancing spring 5 and small balancing spring 6, big equilibrium bomb simultaneously upwards Spring 5 and small balancing spring 6 push brake pushrod 3 to move upwards simultaneously, the core bar in 46 lower end of brake piston and air inlet rubber valve Door 22 separates, and opens exhaust valve port, the high pressure gas that when braking uses is from cylindrical hole on 46 axial line of brake piston by third Muffler ASSY 49 is discharged into atmosphere, realizes and releases braking；Meanwhile braking light switch spring 17 pushes braking light switch electric installation 13 move right, and braking light switch conductive sheet 14 divides with braking light switch cathode stud 16 and braking light switch anode stud 18 It opens, Brake lamp goes out.
Agricultural traction engine trailer Piston Pneumatic Brake Valve assembly structure is compact, cost is relatively low, brake piston assembly will be into row Gas valve core it is integrated in installation and use with upper housing assembly, lower case assembly, big balancing spring, small balancing spring, system Piston return spring is coaxial, and sealing performance significantly improves, and improves the static characteristic and dynamic characteristic of air brake valve assembly；Disappear Exhaust noise when sound device device is used to reduce pressure overload or releases braking, reduces environmental pollution；Pressure sensor apparatus is used Brake system control unit is fed back in acquisition real-time pressure data, control precision is high, and braking ability is good；It ensure that agricultural is dilatory The traffic safety of machine unit.

Claims (5)

1. agricultural traction engine trailer Piston Pneumatic Brake Valve assembly, comprising: upper housing assembly (1), brake piston assembly (7), system Dynamic lamp switch assembly (15), lower case assembly (30)；It is characterized by: upper housing assembly (1) passes through in upper housing assembly (1) The lower end of upper housing (4) passes sequentially through the upper of the lower case (25) in bolt, spring washer, plain washer and lower case assembly (30) End is spirally connected；O-ring seals (45) in lower case assembly (30) are arranged in the upper end of lower case (25)；The upper end of lower case (25) It is in sealing contact by O-ring seals (45) and the lower end of upper housing (4)；Brake piston assembly (7) is mounted on upper housing assembly (1) It is internal with lower case assembly (30)；Braking light switch assembly (15) is mounted on lower case assembly (30) outside, is opened by Brake lamp The the first combination sealing washer (21) closed in assembly (15) is connect with lower case (25), and with the in brake piston assembly (7) Air brake valve outlet plug screw (52) in two pressure transducer assemblies (51) and brake piston assembly (7) hangs down in same level Straight arrangement；Second pressure sensor unit (51) and air brake valve outlet plug screw (52) are arranged in agricultural traction engine trailer movable Plug air brake valve assembly two sides；The second overload valve chest in braking light switch assembly (15) and brake piston assembly (7) (39) agricultural traction engine trailer Piston Pneumatic Brake Valve assembly two sides are arranged in；First pressure in lower case assembly (30) The first overload valve chest (33) in sensor unit (24) and lower case assembly (30) is arranged in agricultural traction engine trailer Piston Pneumatic Brake Valve assembly two sides.
2. agricultural traction engine trailer Piston Pneumatic Brake Valve assembly according to claim 1, it is characterised in that: upper housing is total At (1), comprising: small balancing spring pre-tightens screw rod (2), brake pushrod (3), upper housing (4), big balancing spring (5), small equilibrium bomb Spring (6), the 4th star sealing ring (47), the second shackle (48), third muffler ASSY (49)；Brake pushrod (3) is vertical A threaded hole and a cylindrical hole are respectively arranged on axial line, threaded hole is coaxial with cylindrical hole；Brake pushrod (3) lower end circle Post holes pre-tightens screw rod (2) cylindrical body with small balancing spring and matches；Brake pushrod (3) lower end cylindrical hole and small balancing spring (6) Outer diameter matches；Tangent, small balancing spring (6) upper surface on the inside of small balancing spring (6) insertion brake pushrod (3) lower end cylindrical hole Screw rod (2) lower end face contact is pre-tightened with small balancing spring；System in small balancing spring (6) lower end surface and brake piston assembly (7) The contact of piston (46) upper end cylindrical hole bottom end face；Brake pushrod (3) threaded upper ends Kong Yu little balancing spring pre-tightens screw rod (2) Threaded upper ends cylindrical body matches；A ring groove is provided in brake pushrod (3) threaded upper ends hole；Second shackle (48) it is mounted in the ring groove of brake pushrod (3) threaded upper ends hole；It is straight that three sections of coaxial differences are provided with outside brake pushrod (3) The vertical cylinder body of diameter, wherein middle section cylinder diameter is greater than upper section cylinder diameter, and upper section cylinder diameter is greater than lower section circle Column diameter；Brake pushrod (3) upper end is stretched out from upper housing (4) upper end center hole, brake pushrod (3) middle section cylindrical body upper surface With upper housing (4) interior lower end face contact；Brake pushrod (3) lower section cylindrical body matches with big balancing spring (5) internal diameter；Braking It is tangent on the inside of the big balancing spring (5) of push rod (3) lower section cylindrical body insertion, on middle section cylindrical body lower end surface and big balancing spring (5) End face contact；Brake piston (46) upper end ring-shaped cylinder blind hole in big balancing spring (5) lower end surface and brake piston assembly (7) Bottom end face contact；Small balancing spring pre-tightens setting outside screw rod (2), and there are two the cylindrical body of coaxial different-diameter, upper end circles Column diameter is less than lower end cylinder diameter；Small balancing spring pre-tightens and is provided with screw thread on the cylindrical body of screw rod (2) upper end；Small balance A linear type groove is provided on spring pre-tightening screw rod (2) upper end outer horizontal section；Small balancing spring pre-tightens on screw rod (2) End is screwed in across brake pushrod (3) lower end cylindrical hole from threaded upper ends hole bottom, with end in contact under the second shackle (48)；On There are two coaxial circles post holes, upper end cylinder bore diameter to be less than lower end cylinder bore diameter for setting in shell (4) vertical central lines；Upper casing An o-ring groove is provided in the cylindrical hole of body (4) upper end；4th star sealing ring (47) is mounted on upper housing (4) upper end circle In post holes o-ring groove；Brake pushrod (3) is in sealing contact by the 4th star sealing ring (47) and upper housing (4)；Upper housing (4) middle part is provided with a horizontal threaded bore；Cylindrical body there are three coaxial different-diameter is set outside upper housing (4), in Portion's cylindrical body is vertically evenly distributed with three cylindrical holes, and lower end cylindrical body is vertically evenly distributed with six cylindrical holes；In the middle part of upper housing (4) under cylindrical body Hold uniformly distributed three triangle reinforcing ribs；Third muffler ASSY (49) is mounted on the horizontal threaded bore in the middle part of upper housing (4)；System In brake piston (46) upper end insertion upper housing (4) lower end cylindrical hole in piston assembly (7)；Upper housing (4) passes through braking The second star sealing ring (9) in the first star sealing ring (8), brake piston assembly (7), braking in piston assembly (7) are lived Third star sealing ring (10) and brake piston (46) in plug assembly (7) is in sealing contact；Upper housing (4) lower end cylindrical body is successively It is spirally connected by lower case (25) upper end cylindrical body in bolt, spring washer, plain washer and lower case assembly (30)；Upper housing (4) lower end surface of lower end cylindrical body passes through the O-ring seals (45) and lower case (25) upper end cylinder in lower case assembly (30) The upper surface of body is in sealing contact；Cylindrical body passes sequentially through bolt, spring washer, plain washer and tractor bottom in the middle part of upper housing (4) Plate connection.
3. agricultural traction engine trailer Piston Pneumatic Brake Valve assembly according to claim 1, it is characterised in that: brake piston Assembly (7), comprising: the first star sealing ring (8), the second star sealing ring (9), third star sealing ring (10), second are eliminated the noise Device assembly (37), the second poppet valve core (38), the second overload valve chest (39), the second overload valve spring (40), the second overload valve tune Compression bar (41), the second locking nut (42), the 5th combination sealing washer (43), brake piston return spring (44), brake piston (46), the 6th combination sealing washer (50), second pressure sensor unit (51), air brake valve outlet plug screw (52), the 7th group It closes seal washer (53)；Cylindrical hole and a ring-shaped cylinder are blind there are two being respectively set in brake piston (46) vertical central lines Hole, two cylindrical holes and a ring-shaped cylinder blind hole are coaxial；Brake piston (46) upper end ring-shaped cylinder blind hole diameter is greater than upper end Cylinder bore diameter；Upper end cylinder bore diameter is greater than lower end cylinder bore diameter；Brake piston (46) upper end ring-shaped cylinder blind hole with it is upper Big balancing spring (5) outer diameter in housing assembly (1) matches；Big balancing spring (5) insertion brake piston (46) upper end annular Tangent on the inside of cylinder blind hole, big balancing spring (5) lower end surface connects with brake piston (46) upper end ring-shaped cylinder blind via bottom end face Touching；Brake piston (46) upper end cylindrical hole matches with small balancing spring (6) outer diameter in upper housing assembly (1)；Small equilibrium bomb Spring (6) is inserted into tangent on the inside of the cylindrical hole of brake piston (46) upper end, small balancing spring (6) lower end surface and brake piston (46) upper end The contact of cylindrical hole bottom end face；The vertical cylinder body of three sections of coaxial different-diameters is provided with outside brake piston (46), wherein Upper section cylinder diameter is greater than middle section cylinder diameter, and middle section cylinder diameter is greater than lower section cylinder diameter；Brake piston (46) there are three uniformly distributed o-ring grooves for the setting of upper section cylindrical outer；First star sealing ring (8), the second star sealing ring (9), third star sealing ring (10) is sequentially arranged in brake piston (46) upper section cylindrical outer o-ring groove；Braking is lived Fill in the upper housing (4) in piston insertion upper housing assembly (1) in (46) upper end and the lower case in lower case assembly (30) (25) inner cavity；The intermediate inner hole of core bar insertion lower case (25) in brake piston (46) lower end；In brake piston (46) lower end Gap between core bar excircle and lower case (25) inner periphery is communicated with air brake valve outlet plug screw (52)；Brake piston (46) Core bar inner hole in lower end is communicated with the third muffler ASSY (49) in upper housing assembly (1)；In brake piston (46) upper end Piston upper surface be in air brake valve third muffler ASSY (49) always below；Brake piston (46) middle section cylindrical body and system Piston return spring (44) internal diameter matches；Brake piston return spring (44) is inserted into outside the cylindrical body of brake piston (46) middle section Side is tangent；Brake piston return spring (44) upper surface and brake piston (46) upper section cylindrical body lower end face contact；Brake piston Return spring (44) lower end surface connects with lower case (25) upper end ring-shaped cylinder blind via bottom end face in lower case assembly (30) Touching；Cylindrical body there are two coaxial different-diameter is set outside the second overload valve chest (39), wherein left end cylinder diameter Less than right end cylinder diameter；Screw thread is provided on second overload valve chest (39) left end cylindrical body；Second overload valve chest (39) the cylindrical body bottom of thread in left end is provided with a ring groove；Setting on the right of second overload valve chest (39) right end cylindrical body There are two with the symmetrical horizontal groove in axle center；It is coaxial there are two being respectively set on second overload valve chest (39) horizontal axis line Different-diameter cylindrical hole, wherein left end cylinder bore diameter be less than right end cylinder bore diameter；Second overload valve chest (39) is right Screw thread is provided in the cylindrical hole of end；Second overload valve chest (39) right end cylindrical body left side is provided with a screw thread vertically downward Hole；Second overload valve chest (39) passes through lower case (25) upper right end in left end cylindrical body screw thread and lower case assembly (30) Threaded hole connection；Second overload valve chest (39) is in sealing contact by the 5th combination sealing washer (43) and lower case (25)；The Two muffler ASSYs (37) are by the second muffler ASSY (37) threaded upper ends, with second overload valve chest (39) right end cylindrical body The threaded hole connection of the left side vertically downward；Second poppet valve core (38) is provided with a cone and a cylindrical body, left end circular cone Body and right end cylindrical body are coaxial；Second poppet valve core (38) left end cone maximum gauge is greater than right end cylinder diameter；Second cone The right end face contact of the circular conical surface of spool (38) left end cone and second overload valve chest (39) left end cylindrical hole；Second cone valve Core (38) right end cylindrical body matches with second overload valve spring (40) internal diameter；Second poppet valve core (38) right end cylindrical body insertion the It is tangent on the inside of two overloads valve spring (40)；Second poppet valve core (38) left end cone right side and the second overload valve spring (40) are left End face contact；Left end is provided with a blind hole on second overload valve pressure regulation bar (41) axial line；Second overload valve pressure regulation bar (41) Left end blind hole matches with second overload valve spring (40) outer diameter on axial line；Second the second overload of overload valve spring (40) insertion It is tangent on the inside of the blind hole of left end on valve pressure regulation bar (41) axial line, the second overload valve spring (40) right side and the second overload valve pressure regulation Left end blind via bottom end face contacts on bar (41) axial line；Spiral shell is provided on second overload valve pressure regulation bar (41) left end cylindrical body Line；The cuboid that a vertical cross-section is square is provided with outside second overload valve pressure regulation bar (41) right end；Second overload valve Pressure regulation bar (41) is connect by left end cylindrical body screw thread with second overload valve chest (39) right end threaded hole；Second overload valve pressure regulation Bar (41) passes through the second locking nut (42) and the second overload valve chest (39) locking；Second pressure sensor unit (51) passes through The right end cylindrical body screw thread of second pressure sensor unit (51) is connect with lower case (25) upper left end threaded hole；Second pressure Sensor unit (51) is in sealing contact by the 6th combination sealing washer (50) and lower case (25)；Air brake valve outlet plug screw (52) it is connect by the left end cylindrical body screw thread of air brake valve outlet plug screw (52) with lower case (25) upper right end threaded hole；Gas Brake valve outlet plug screw (52) is in sealing contact by the 7th combination sealing washer (53) and lower case (25).
4. agricultural traction engine trailer Piston Pneumatic Brake Valve assembly according to claim 1, it is characterised in that: Brake lamp is opened It closes assembly (15), comprising: the first shackle (11), braking light switch adjust stud (12), braking light switch electric installation (13), braking light switch conductive sheet (14), braking light switch cathode stud (16), braking light switch spring (17), Brake lamp are opened Close anode stud (18), water proof and dust proof protective cover (19), braking light switch seat (20), the first combination sealing washer (21)；Braking There are two cylindrical bodies, left end cylinder diameter to be greater than right end cylinder diameter for setting outside lamp switch cathode stud (16)；Braking Screw thread is provided on the cylindrical body of lamp switch cathode stud (16) left end；Outside braking light switch anode stud (18) there are two settings Cylindrical body, left end cylinder diameter are greater than right end cylinder diameter；It is set on the cylindrical body of braking light switch anode stud (18) left end It is equipped with screw thread；Braking light switch cathode stud (16), braking light switch anode stud (18) are put into mold simultaneously, by injection molding machine It is molded by braking light switch seat (20)；After braking light switch seat (20) injection molded, respectively in braking light switch cathode stud (16) two connection electricity are respectively installed on the threaded cylinder of left end and on the threaded cylinder of braking light switch anode stud (18) left end Line locking nut；Water proof and dust proof protective cover (19) is mounted on braking light switch seat (20)；Braking light switch seat (20) trunnion axis Right end is provided with a tapped blind hole on heart line；It is convex that braking light switch seat (20) right end tapped blind hole bottom is provided with a cylinder Platform；Braking light switch seat (20) right end tapped blind hole and cylinder boss are coaxial；Braking light switch seat (20) right end tapped blind hole is right While being provided with a ring groove；Braking light switch seat (20) right end tapped blind hole bottom cylinder boss and braking light switch spring (17) internal diameter matches；Braking light switch seat (20) right end tapped blind hole bottom cylinder boss is inserted into braking light switch spring (17) Inside is tangent；Braking light switch spring (17) left side is contacted with braking light switch seat (20) right end tapped blind hole bottom end face； Two cylindrical bodies and a hexagonal prism are respectively arranged with outside braking light switch seat (20), two cylindrical bodies and a hexagonal prism are same Axis；The inscribed circle diameter of braking light switch seat (20) hexagonal prism is greater than left end cylinder diameter；Braking light switch seat (20) left end Cylinder diameter is greater than right end cylinder diameter；It is recessed that braking light switch seat (20) hexagonal prism both ends are respectively arranged with an annulus Slot；Screw thread is provided on braking light switch seat (20) right end cylindrical body；Braking light switch is adjusted to be arranged on stud (12) cylindrical body There is screw thread；Braking light switch adjusts and is provided with a cylindrical hole on stud (12) axial line；Braking light switch adjusts stud (12) Cylindrical body is coaxial with cylindrical hole；Braking light switch adjusts stud (12) right end and is provided with a "-" type groove；Braking light switch Conductive sheet (14) is equal thickness annular shape copper sheet；Braking light switch conductive sheet (14) and braking light switch electric installation (13) are together Hot forming；Two cylindrical bodies are respectively arranged with outside braking light switch electric installation (13), two cylindrical bodies are coaxial；Brake lamp Switches conductive device (13) left end cylinder diameter is less than right end cylinder diameter；Braking light switch electric installation (13) left end circle Cylinder matches with braking light switch spring (17) internal diameter；Braking light switch electric installation (13) left end cylindrical body is inserted into Brake lamp It is tangent on the inside of switch spring (17)；Braking light switch spring (17) right side and braking light switch electric installation (13) right end cylinder Body left end face contact；Braking light switch adjusts stud (12) and is connect by screw thread with braking light switch seat (20)；Braking light switch Adjust stud (12) left side and braking light switch electric installation (13) right end face contact；First shackle (11) is mounted on system In dynamic lamp switch seat (20) right end tapped blind hole ring groove；First shackle (11) left side and braking light switch adjust spiral shell Column (12) right end face contact；Braking light switch seat (20) passes through the lower case in right end cylindrical body screw thread and lower case assembly (30) (25) upper left end threaded hole connects；Braking light switch seat (20) is close by the first combination sealing washer (21) and lower case (25) Sealing-in touching.
5. agricultural traction engine trailer Piston Pneumatic Brake Valve assembly according to claim 1, it is characterised in that: lower case is total At (30), comprising: air inlet rubber valve (22), the second combination sealing washer (23), first pressure sensor assembly (24), lower casing Body (25), air inlet rubber valve return spring (26), third combination sealing washer (27), air brake valve air inlet plug screw (28), Four combination sealing washers (29), the first muffler ASSY (31), the first poppet valve core (32), the first overload valve chest (33), first Locking nut (34), the first overload valve spring (35), the first overload valve pressure regulation bar (36), O-ring seals (45)；Lower case (25) Upper end is provided with an o-ring groove, is vertically evenly distributed with six threaded holes；It is respectively arranged in lower case (25) vertical central lines One cylindrical hole and two ring-shaped cylinder blind holes, a cylindrical hole and two ring-shaped cylinder blind holes are coaxial；Lower case (25) upper end Ring-shaped cylinder blind hole diameter is greater than lower end ring-shaped cylinder blind hole diameter；During lower case (25) lower end ring-shaped cylinder blind hole diameter is greater than Between cylinder bore diameter；Lower case (25) lower end ring-shaped cylinder blind hole lower part is provided with screw thread；Lower case (25) top is in same water There are four horizontal uniformly distributed threaded holes for setting in plane；Lower case (25) lower part is arranged in same level to be evenly distributed with there are two horizontal Threaded hole；Brake piston return in lower case (25) upper end ring-shaped cylinder blind hole mediate cylindrical and brake piston assembly (7) Spring (44) internal diameter matches；Lower case (25) upper end ring-shaped cylinder blind hole mediate cylindrical is inserted into brake piston return spring (44) inside is tangent；Lower case (25) upper end ring-shaped cylinder blind via bottom end face connects with brake piston return spring (44) lower end surface Touching；O-ring seals (45) are mounted in the o-ring groove of lower case (25) upper end；Lower case (25) passes sequentially through bolt, bullet Upper housing (4) in spring gasket, flat shim and upper housing assembly (1) is spirally connected；Lower case (25) by O-ring seals (45) with it is upper Shell (4) is in sealing contact；Lower case (25) upper left end threaded hole is close by the first combination in braking light switch assembly (15) Seal washer (21) is connect with the braking light switch seat (20) in braking light switch assembly (15)；Lower case (25) upper right end spiral shell Pit is by the 5th combination sealing washer (43) in brake piston assembly (7), with the second overload in brake piston assembly (7) Valve chest (39) connection；Lower case (25) upper back threaded hole passes through the 6th combination sealing pad in brake piston assembly (7) It encloses (50), is connect with the second pressure sensor unit (51) in brake piston assembly (7)；Lower case (25) upper front screw thread Hole is gone out by the 7th combination sealing washer (53) in brake piston assembly (7) with the air brake valve in brake piston assembly (7) Gas plug screw (52) connection；Lower case (25) lower part left end threaded hole is sensed by the second combination sealing washer (23) and first pressure Device assembly (24) connection；Air inlet rubber valve (22) is rubber parts, is disk, air inlet rubber at the top of air inlet rubber valve (22) Valve (22) lower edge round ring boss is lower than central circular boss；Air inlet rubber valve return spring (26) upper end be inserted into In the annular groove of gas rubber valve (22) lower end, and with cylindrical surface inscribe；Air inlet rubber valve return spring (26) outer diameter with Air brake valve air inlet plug screw (28) lower end cylindrical hole matches；Air inlet rubber valve return spring (26) is inserted into air brake valve air inlet It is tangent on the inside of the cylindrical hole of plug screw (28) lower end, air inlet rubber valve return spring (26) lower end surface and air brake valve air inlet plug screw (28) upper end face contact；Air brake valve air inlet plug screw (28) is connect by third combination sealing washer (27) with lower case (25)； Air brake valve air inlet plug screw (28) lower end is connect with high pressure admission pipeline；There are two same for setting outside first overload valve chest (33) The cylindrical body of the different-diameter of axis, wherein left end cylinder diameter is less than right end cylinder diameter；First overload valve chest (33) Screw thread is provided on the cylindrical body of left end；It is recessed that first overload valve chest (33) left end cylindrical body bottom of thread is provided with an annulus Slot；There are two first overload valve chest (33) right end cylindrical body the right settings and the symmetrical horizontal groove in axle center；First overload The cylindrical hole there are two coaxial different-diameter is respectively set on valve chest (33) horizontal axis line, wherein left end cylinder bore diameter Less than right end cylinder bore diameter；Screw thread is provided in first overload valve chest (33) right end cylindrical hole；First overload valve chest (33) the right end cylindrical body left side is provided with a threaded hole vertically downward；First overload valve chest (33) passes through left end cylindrical body Screw thread is connect with lower case (25) lower part right end threaded hole；First overload valve chest (33) passes through the 4th combination sealing washer (29) It is in sealing contact with lower case (25)；First muffler ASSY (31) is by the first muffler ASSY (31) threaded upper ends, with first Overload the threaded hole connection of valve chest (33) right end cylindrical body left side vertically downward；First poppet valve core (32) is provided with a circular cone Body and a cylindrical body, left end cone and right end cylindrical body are coaxial；First poppet valve core (32) left end cone maximum gauge is big In right end cylinder diameter；The circular conical surface of first poppet valve core (32) left end cone and first overload valve chest (33) left end cylinder The right end face contact in hole；First poppet valve core (32) right end cylindrical body matches with first overload valve spring (35) internal diameter；First cone It is tangent on the inside of the first overload valve spring (35) of spool (32) right end cylindrical body insertion；First poppet valve core (32) left end cone right end Face and first overload valve spring (35) left end face contact；On first overload valve pressure regulation bar (36) axial line left end be provided with one it is blind Hole；Left end blind hole matches with first overload valve spring (35) outer diameter on first overload valve pressure regulation bar (36) axial line；First mistake It carries valve spring (35) and is inserted into tangent on the inside of the blind hole of left end on first overload valve pressure regulation bar (36) axial line, the first overload valve spring (35) right side is contacted with left end blind via bottom end face on first overload valve pressure regulation bar (36) axial line；First overload valve pressure regulation bar (36) screw thread is provided on the cylindrical body of left end；A vertical cross-section is provided with outside first overload valve pressure regulation bar (36) right end to be positive Rectangular cuboid；First overload valve pressure regulation bar (36) passes through left end cylindrical body screw thread and first overload valve chest (33) right end spiral shell Pit connection；First overload valve pressure regulation bar (36) passes through the first locking nut (34) and the first overload valve chest (33) locking.
CN201822116423.6U 2018-12-17 2018-12-17 Agricultural traction engine trailer Piston Pneumatic Brake Valve assembly Expired - Fee Related CN209381980U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201822116423.6U CN209381980U (en) 2018-12-17 2018-12-17 Agricultural traction engine trailer Piston Pneumatic Brake Valve assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201822116423.6U CN209381980U (en) 2018-12-17 2018-12-17 Agricultural traction engine trailer Piston Pneumatic Brake Valve assembly

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CN209381980U true CN209381980U (en) 2019-09-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109466528A (en) * 2018-12-17 2019-03-15 南阳理工学院 Agricultural traction engine trailer Piston Pneumatic Brake Valve assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109466528A (en) * 2018-12-17 2019-03-15 南阳理工学院 Agricultural traction engine trailer Piston Pneumatic Brake Valve assembly

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Granted publication date: 20190913

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