CN103171542B - A kind of Hydraulic brake master pump structure of agricultural harvester - Google Patents
A kind of Hydraulic brake master pump structure of agricultural harvester Download PDFInfo
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- CN103171542B CN103171542B CN201310098146.XA CN201310098146A CN103171542B CN 103171542 B CN103171542 B CN 103171542B CN 201310098146 A CN201310098146 A CN 201310098146A CN 103171542 B CN103171542 B CN 103171542B
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- agricultural harvester
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Abstract
The present invention is a kind of Hydraulic brake master pump structure of agricultural harvester, belongs to agricultural harvester brake field.The present invention includes the pump housing, offer A chamber, B chamber, two stepped hole C and two stepped hole D in the pump housing, in A chamber, chamber all offers fuel feed hole to B, is provided with and fills valve assembly soon in fuel feed hole; In two stepped hole C, be provided with valve piston, be provided with large piston, the greatly leading section of piston in two stepped hole D and be set with dust boot, valve piston and large piston bolt; Oil outlet is offered on rear side of valve piston, oil outlet is provided with oil outlet plug and fuel discharge port, and O RunddichtringO is provided with between oil outlet plug and the pump housing, be provided with steel ball screw in the below of two stepped hole C, between steel ball screw and two stepped hole C, be provided with steel ball.The present invention brakes laborsaving, and pedal stroke is little, and brake sensitivity is high; Piston slides freely, and can effectively anti-sealing and mud enter; Easy to manufacture, reliable operation; One pin just can brake; Piston and cylinder holes gap little.
Description
Technical field
The present invention relates to a kind of agricultural harvester brake field, specifically refer to a kind of Hydraulic brake master pump structure of agricultural harvester.
Background technology
As everyone knows, in existing agricultural harvester brake field, Hydraulic brake master pump structure of agricultural harvester, see shown in Figure of description 1, during braking, steps on brake pedal, and piston moves forward; Close oil-feed valve port, set up system pressure.Its defect is as follows: 1, cropper is in farmland during operation, and turn radius is little, individual operation pedal, needs energy one side brake; When highway travels, combined operation two pedals, the piston exposed easily is stained with water and mud, causes getting rusty easily; Piston is also easily stuck, causes the difficulty that resets.2, often leak, without one side brake; Because in steel ball valve seat and the pump housing, the place of connecing is steel sealing, to parts planeness and roughness requirements very high, in batch manufacturing be difficult to control.3, when brake system temperature raises, a pin cannot brake.4, brake pedal force is large: the power needed due to piston fast reposition is large, and spring stiffness is large, needs special tool when assembling and maintenance.
Summary of the invention
For the defect existed in background technology, technical matters to be solved by this invention is: provide one to have braking laborsaving, pedal stroke is little, and brake sensitivity is high; And can prevent the piston exposed from getting rusty, piston guide is stuck, prevents the Hydraulic brake master pump structure of agricultural harvester revealed.
For achieving the above object, the invention provides following technical scheme: a kind of Hydraulic brake master pump structure of agricultural harvester, comprise the pump housing, an A chamber is offered in the pump housing, a B chamber, two two stepped hole C and two two stepped hole D, wherein A chamber, B chamber is arranged on the top of the pump housing, two stepped hole C are arranged on the rear portion of the pump housing, two stepped hole D are arranged on the front portion of the pump housing, wherein the aperture of two stepped hole D is greater than the aperture of two stepped hole C, in described A chamber, B chamber all offers fuel feed hole and be intercommunication between fuel feed hole, be provided with in fuel feed hole and fill valve assembly soon, the leading section being provided with valve piston, valve piston in two stepped hole C is set with main bowl and protection pad, be provided with large piston in two stepped hole D, that the leading section of large piston extend out to two stepped hole D is outer and be provided with retracing spring, dust boot is set with outside retracing spring, the rearward end of large piston is set with secondary bowl, and the leading section of described valve piston is connected by screw thread with the rearward end of large piston, oil outlet is offered at the rear side of valve piston, this oil outlet is disposed with oil outlet plug and fuel discharge port from front to back, and O RunddichtringO is provided with between oil outlet plug and the pump housing, the below of two stepped hole C is provided with steel ball screw, and and be intercommunication between the steel ball screw steel ball screw hole of working in coordination, between steel ball screw and two stepped hole C, be provided with steel ball.
The leading section of above-mentioned valve piston is connected by the cross-recessed screw being threaded fastening agent with the rearward end of large piston.
The helicitic texture gone up foremost by being threaded fastening agent of above-mentioned large piston is bolted with a piston head, and this piston head is provided with groove structure.
The rear end of above-mentioned retracing spring is contained on the second step hole of two stepped hole D, front end and piston head compress mutually.
The rear end of above-mentioned dust boot is contained in the first step hole of two stepped hole D, front end is connected with the groove structure of piston head.
The back edge of above-mentioned dust boot is outwardly convex structure, the first step hole of two stepped hole D is provided with C type ring recess, and C type ring recess is built with C type circle, and this C type circle blocks the bulge-structure of dust boot.
Above-mentioned dust boot is hollow sleeve structure, and dust boot axial surface is in ups and downs wavy shaped configuration vertically.
The front end of two above-mentioned stepped hole D is provided with jump-ring slot, and jump-ring slot is built with jump ring, and large piston is fixed on two stepped hole D by jump ring.
The present invention's beneficial effect compared to existing technology: the present invention brakes laborsaving, and pedal stroke is little, and brake sensitivity is high; The large piston of the present invention and valve piston slide all very freely, outside the large piston exposed, add dust boot, can the entering of effectively anti-sealing and mud; Reliable operation of the present invention, No leakage, fuel feed hole place adopts fills valve assembly soon, easy to manufacture, thus reaches reliable operation, leak free object; When brake system temperature of the present invention raises, a pin just can brake; The original master cylinder of foot pedal force rate of the present invention alleviates the power of 30 percent; The present invention adopts O RunddichtringO to seal, piston and cylinder holes gap little.
Accompanying drawing explanation
Fig. 1 is the construction profile cross-sectional schematic of Hydraulic brake master pump structure of agricultural harvester in background technology of the present invention;
Fig. 2 is the construction profile cross-sectional schematic of Hydraulic brake master pump structure of agricultural harvester of the present invention;
Fig. 3 is the partial enlarged drawing in H portion in Fig. 2 of the present invention;
Fig. 4 is A-A cross section schematic diagram in Fig. 2 of the present invention.
Number in the figure implication:
1-piston head; 2-groove structure; 3-dust boot; 4-retracing spring; 5-C type circle; 6-first step hole; 7-second step hole; 8-jump-ring slot; The secondary bowl of 9-; The large piston of 10-; The 11-pump housing; 12-protects pad; The main bowl of 13-; 14-cross-recessed screw; 15-valve piston; 16-steel ball screw; 17-steel ball; 18-oil outlet plug; 19-O RunddichtringO; 20-fuel discharge port; 21-fuel feed hole; 22-fills valve assembly soon.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Shown in Figure of description 2, a kind of Hydraulic brake master pump structure of agricultural harvester, comprise the pump housing 11, an A chamber, a B chamber, two two stepped hole C and two two stepped hole D are offered in the pump housing 11, wherein A chamber, B chamber are arranged on the top of the pump housing 11, two stepped hole C are arranged on the rear portion of the pump housing 11, two stepped hole D are arranged on the front portion of the pump housing 11, wherein the aperture of two stepped hole D is greater than the aperture of two stepped hole C, described A chamber, B chamber all offer fuel feed hole 21 and be intercommunication between fuel feed hole 21, be provided with in fuel feed hole 21 and fill valve assembly 22 soon; The leading section being provided with valve piston 15, valve piston 15 in two stepped hole C is set with main bowl 13 and protection pad 12, be provided with large piston 10 in two stepped hole D, that the leading section of large piston 10 extend out to two stepped hole D is outer and be provided with retracing spring 4, dust boot 3 is set with outside retracing spring 4, the rearward end of large piston 10 is set with secondary bowl 9, and the leading section of described valve piston 15 is connected by screw thread with the rearward end of large piston 10; Oil outlet is offered at the rear side of valve piston 15, this oil outlet is disposed with from front to back oil outlet plug 18 and fuel discharge port 20, and O RunddichtringO 19 is provided with between oil outlet plug 18 and the pump housing 11, the below of two stepped hole C is provided with steel ball screw 16, and and be intercommunication between the steel ball screw 16 steel ball screw hole of working in coordination, between steel ball screw 16 and two stepped hole C, be provided with steel ball 17.
Further, the leading section of above-mentioned valve piston 15 is connected by the cross-recessed screw 14 being threaded fastening agent with the rearward end of large piston 10.
Further, the helicitic texture gone up foremost by being threaded fastening agent of above-mentioned large piston 10 is bolted with a piston head 1, and this piston head 1 is provided with groove structure 2.
Further, the rear end of above-mentioned retracing spring 4 is contained on the second step hole 7 of two stepped hole D, front end and piston head 1 compress mutually.
Further, the rear end of above-mentioned dust boot 3 is contained in the first step hole 6 of two stepped hole D, front end is connected with the groove structure 2 of piston head 1.
Further, the back edge of above-mentioned dust boot 3 is outwardly convex structure, the first step hole 6 of two stepped hole D is provided with C type ring recess, and C type ring recess is built with C type circle 5, and this C type circle 5 blocks the bulge-structure of dust boot 3.
Further, above-mentioned dust boot 3 is hollow sleeve structure, and dust boot 3 axial surface is in ups and downs wavy shaped configuration vertically.
Further, the front end of two above-mentioned stepped hole D is provided with jump-ring slot 8, and jump-ring slot 8 is built with jump ring, and large piston 10 is fixed on two stepped hole D by jump ring.
In a structure of the in-vention, the large piston 10 exposed adds dust boot 3, thus can the entering of effectively anti-sealing and mud, and reaches and prevents from getting rusty, guarantee the object that large piston 10 and valve piston 15 slide freely.
In the present invention, at fuel feed hole 21 built with filling valve assembly 22(soon see Figure of description 3), and clamp with hole back-up ring.The effect of filling valve assembly is soon full of piston large end face bobbin district fast from the liquid of lubricating cup.Principle between them is when stepping on brake pedal, and piston starts to move forward, and because piston rear portion diameter is larger than anterior, the pressure of generation is also large than front portion, and when piston continues reach, this difference of pressure makes liquid flow through around main bowl.Like this, add the operation pressure before microcephaly's piston, pressure adds, and pedal stroke also just decreases, and when a particular pressure value, the pressure in two cylinder diameters is equal.Now, fill soon the steel ball in valve open, the liquid stream in large end face piston bobbin district gets back to lubricating cup, when loosen the brake, retracing spring forces piston to return, in comparatively large-diameter, form low pressure, this low pressure opens the rubber seal filling valve soon, and braking liquid is full of piston large end face bobbin district fast from lubricating cup.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle, makes some improvement and modification also should be considered as protection scope of the present invention.
Claims (8)
1. a Hydraulic brake master pump structure of agricultural harvester, it is characterized in that: comprise the pump housing, an A chamber, a B chamber, two two stepped hole C and two two stepped hole D are offered in the pump housing, wherein A chamber, B chamber are arranged on the top of the pump housing, two stepped hole C are arranged on the rear portion of the pump housing, two stepped hole D are arranged on the front portion of the pump housing, wherein the aperture of two stepped hole D is greater than the aperture of two stepped hole C, described A chamber, B chamber all offer fuel feed hole and be intercommunication between fuel feed hole, be provided with in fuel feed hole and fill valve assembly soon; The leading section being provided with valve piston, valve piston in two stepped hole C is set with main bowl and protection pad, be provided with large piston in two stepped hole D, that the leading section of large piston extend out to two stepped hole D is outer and be provided with retracing spring, dust boot is set with outside retracing spring, the rearward end of large piston is set with secondary bowl, and the leading section of described valve piston is connected by screw thread with the rearward end of large piston; Oil outlet is offered at the rear side of valve piston, this oil outlet is disposed with oil outlet plug and fuel discharge port from front to back, and O RunddichtringO is provided with between oil outlet plug and the pump housing, the below of two stepped hole C is provided with steel ball screw, and and be intercommunication between the steel ball screw steel ball screw hole of working in coordination, between steel ball screw and two stepped hole C, be provided with steel ball.
2. Hydraulic brake master pump structure of agricultural harvester according to claim 1, is characterized in that: the leading section of described valve piston is connected by the cross-recessed screw being threaded fastening agent with the rearward end of large piston.
3. Hydraulic brake master pump structure of agricultural harvester according to claim 1, is characterized in that: the helicitic texture gone up foremost by being threaded fastening agent of described large piston is bolted with a piston head, and this piston head is provided with groove structure.
4. Hydraulic brake master pump structure of agricultural harvester according to claim 3, is characterized in that: the rear end of described retracing spring is contained on the second step hole of two stepped hole D, front end and piston head compress mutually.
5. Hydraulic brake master pump structure of agricultural harvester according to claim 3, is characterized in that: the rear end of described dust boot is contained in the first step hole of two stepped hole D, front end is connected with the groove structure of piston head.
6. Hydraulic brake master pump structure of agricultural harvester according to claim 5, it is characterized in that: the back edge of described dust boot is outwardly convex structure, the first step hole of two stepped hole D is provided with C type ring recess, C type ring recess is built with C type circle, and this C type circle blocks the bulge-structure of dust boot.
7. the Hydraulic brake master pump structure of agricultural harvester according to claim 5 or 6, is characterized in that: described dust boot is hollow sleeve structure, and dust boot axial surface is in ups and downs wavy shaped configuration vertically.
8., according to the Hydraulic brake master pump structure of agricultural harvester of claim 4-6 described in any one, it is characterized in that: the front end of two described stepped hole D is provided with jump-ring slot, jump-ring slot is built with jump ring, and large piston is fixed on two stepped hole D by jump ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310098146.XA CN103171542B (en) | 2013-03-25 | 2013-03-25 | A kind of Hydraulic brake master pump structure of agricultural harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310098146.XA CN103171542B (en) | 2013-03-25 | 2013-03-25 | A kind of Hydraulic brake master pump structure of agricultural harvester |
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| Publication Number | Publication Date |
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| CN103171542A CN103171542A (en) | 2013-06-26 |
| CN103171542B true CN103171542B (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310098146.XA Active CN103171542B (en) | 2013-03-25 | 2013-03-25 | A kind of Hydraulic brake master pump structure of agricultural harvester |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109435925A (en) * | 2018-12-28 | 2019-03-08 | 芜湖稳乐制动系统有限公司 | A kind of master cylinder |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2129520A (en) * | 1982-11-02 | 1984-05-16 | Lucas Ind Plc | A master cylinder assembly for a vehicle hydraulic braking system |
| EP0820912A2 (en) * | 1996-07-22 | 1998-01-28 | General Motors Corporation | Master cylinder |
| US6014862A (en) * | 1998-03-26 | 2000-01-18 | General Motors Corporation | Emulator damping mechanism |
| CN201682809U (en) * | 2010-04-08 | 2010-12-29 | 丹东市辽东液压件厂 | Harvester hydraulic brake pump |
| CN201751254U (en) * | 2010-06-30 | 2011-02-23 | 厦门永裕机械工业有限公司 | Improved structure for brake master cylinder |
| CN102256848A (en) * | 2008-12-16 | 2011-11-23 | 古斯塔夫马根维特有限两合公司 | Master cylinder |
| CN102514563A (en) * | 2011-11-18 | 2012-06-27 | 宁波科达制动器制造有限公司 | Novel hydraulic brake pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203172614U (en) * | 2013-03-25 | 2013-09-04 | 玉环奥恒机械有限公司 | Hydraulic brake master pump structure of agricultural harvester |
-
2013
- 2013-03-25 CN CN201310098146.XA patent/CN103171542B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2129520A (en) * | 1982-11-02 | 1984-05-16 | Lucas Ind Plc | A master cylinder assembly for a vehicle hydraulic braking system |
| EP0820912A2 (en) * | 1996-07-22 | 1998-01-28 | General Motors Corporation | Master cylinder |
| US6014862A (en) * | 1998-03-26 | 2000-01-18 | General Motors Corporation | Emulator damping mechanism |
| CN102256848A (en) * | 2008-12-16 | 2011-11-23 | 古斯塔夫马根维特有限两合公司 | Master cylinder |
| CN201682809U (en) * | 2010-04-08 | 2010-12-29 | 丹东市辽东液压件厂 | Harvester hydraulic brake pump |
| CN201751254U (en) * | 2010-06-30 | 2011-02-23 | 厦门永裕机械工业有限公司 | Improved structure for brake master cylinder |
| CN102514563A (en) * | 2011-11-18 | 2012-06-27 | 宁波科达制动器制造有限公司 | Novel hydraulic brake pump |
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| CN103171542A (en) | 2013-06-26 |
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