CN215719008U

CN215719008U - One-way valve and brake integrated engine braking device

Info

Publication number: CN215719008U
Application number: CN202122034573.4U
Authority: CN
Inventors: 张效利
Original assignee: Qingzhou Yida Auto Parts Co ltd
Current assignee: Qingzhou Yida Auto Parts Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-02-01
Anticipated expiration: 2031-08-26

Abstract

The utility model discloses an engine braking device integrating a one-way valve and a brake, which comprises a braking box body, a first oil inlet hole, a second oil inlet hole, an oil drainage hole and a cylindrical vertical hole, wherein a driving piston is arranged in the cylindrical vertical hole, the upper end of the driving piston is fixedly connected with a first clamp spring, the top end of the cylindrical vertical hole is connected with an adjusting screw in a sliding manner, the upper end and the lower end of the adjusting screw are respectively and fixedly connected with a first reset spring and a second clamp spring, a plugging cover is fixedly connected between the first reset spring and the first clamp spring, the bottom end of the adjusting screw is fixedly connected with a spacing block, a braking plunger is connected in the driving piston in a sliding manner, a first oil hole is formed in the right side of the braking plunger, a second oil hole and a third oil hole are respectively formed in the right side of the driving piston, an oil groove is formed in the concave part of the right side of the driving piston and the braking box body, and a plug for plugging the oil groove is installed on the right side of the braking box body. The utility model integrates the one-way valve and the brake into a whole, does not have overlarge reset stroke, and reduces vibration and abnormal sound.

Description

One-way valve and brake integrated engine braking device

Technical Field

The utility model belongs to the technical field of engine braking, and particularly relates to an engine braking device with a one-way valve and a brake integrated.

Background

Engine braking technology has been available and used for a long time, particularly in heavy duty diesel engines. For heavy trucks, when long-term braking is required, such as when driving on a long downhill slope, a conventional service brake device (brake) is prone to failure due to overheating during long-term use, and thus greatly threatens the driving safety. When a vehicle equipped with the engine braking device runs, a driver starts the engine braking device according to needs, the engine cuts off fuel supply at the moment, the clutch keeps a state of being connected with the power output end of the engine, the vehicle drags the engine to rotate by the kinetic energy of the vehicle, and the engine braking device temporarily converts the engine into an air compressor consuming power by changing the timing and the lift of an air valve, particularly an exhaust valve, so as to realize a braking function. The engine braking device can greatly relieve the working load of the service braking device, greatly improves the running safety of the vehicle, and becomes a necessary configuration for heavy trucks at present.

In the prior art, mechanical impact is generated due to mechanical braking, so that the damage to equipment, structures and the like is large, and the mechanical structure is abraded or does not return to the original position, so that the braking failure is caused.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to an engine brake device with a check valve and a brake integrated therewith, which is put into use to solve the problems of the background art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an engine braking device with a one-way valve and a brake integrated comprises a braking box body, a first oil inlet hole, a second oil inlet hole, an oil drain hole and a cylindrical vertical hole, a driving piston is arranged in the cylindrical vertical hole, the upper end of the driving piston is fixedly connected with a first snap spring, the top end of the cylindrical vertical hole is connected with an adjusting screw in a sliding way, the upper end and the lower end of the adjusting screw are respectively fixedly connected with a first return spring and a second snap spring, a blanking cover is fixedly connected between the first return spring and the first clamp spring, a spacing block is fixedly connected at the bottom end of the adjusting screw, a brake plunger is connected in the driving piston in a sliding manner, a first oil hole is formed in the right side of the brake plunger, the right side of the driving piston is provided with a second oil hole and a third oil hole respectively, an oil groove is formed between the concave part of the right side of the driving piston and the inner wall of the brake box body, and the right side of the brake box body is provided with a plug for plugging the oil groove.

Preferably, the first oil inlet hole is formed in the left side of the brake case, the second oil inlet hole is formed in the left side of the driving piston, and the oil drain hole is formed in the right side of the driving piston.

Preferably, the upper end of the adjusting screw is in threaded connection with an adjusting nut used for adjusting the gap distance, and the adjusting screw penetrates through the top of the brake box body.

Preferably, a steel ball is movably connected to the central hole in the inner top of the braking plunger, a sealing cover is fixedly connected to the bottom of the driving piston, a second return spring is fixedly connected between the sealing cover and the steel ball, and a third return spring is fixedly connected between the bottom of the braking plunger and the inner bottom of the driving piston.

Preferably, an exhaust valve rod connecting piece is arranged below the driving piston, and a rocker arm for controlling the clearance distance between the rocker arm and the exhaust valve rod connecting piece through an electromagnetic valve is arranged outside the brake box body.

Preferably, the exhaust valve rod connector comprises a valve bridge arranged below the driving piston, an actuating pin arranged in the valve bridge in a penetrating manner, a brake valve connected to the inner wall of the actuating pin in a sliding manner, a valve spring upper seat fixedly connected to the outer wall of the brake valve, a valve spring used for timely seating and tightly attaching the brake valve, and a cylinder cover connected to the outer wall of the brake valve in a sliding manner.

Compared with the prior art, the utility model has the beneficial effects that:

1. the drive piston that inside oil circuit machine oil was too much to lead to when effectual preventing high speed stretches out the volume too big, prevents the collision of valve and piston that the drive piston stroke leads to, when the inside oil pressure of stopper is higher than preset pressure, effectively prevents stopper drive piston stroke, reduces vibrations and abnormal sound, avoids simultaneously that it is great to damage such as equipment, structure, mechanical structure wearing and tearing or cause not return phenomenon, lead to the braking failure.

2. The electronic control exhaust braking system is added, so that the braking capability of the automobile is obviously improved, the safety of the automobile is improved, the abrasion of a service brake and a tire is greatly reduced, and the driving fatigue of a driver is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a one-way valve and brake integrated engine braking device according to the present invention;

fig. 2 is a structural sectional view of an engine braking device with a one-way valve and a brake integrated therein according to the present invention.

In the figure: 01. adjusting the nut; 02. adjusting the screw; 03. a first oil inlet hole; 04. a second oil inlet hole; 05. a brake plunger; 06. a steel ball; 07. a first oil hole; 08. a drive piston; 09. a second oil hole; 10. an oil sump; 11. a third oil hole; 12. a first clamp spring; 13. a second clamp spring; 14. blocking the cover; 15. a second return spring; 16. a third return spring; 17. a first return spring; 18. an oil drainage hole; 19. a spacer block; 20. blocking; 21. a sealing cover; 22. a valve bridge; 23. an execution pin; 24. braking the valve; 25. an upper seat of the valve spring; 26. a valve spring; 27. a cylinder head; 28. a rocker arm.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, an engine braking device with a one-way valve and a brake integrated comprises a braking box body, a first oil inlet 03, a second oil inlet 04, an oil drain 18 and a cylindrical vertical hole, wherein a driving piston 08 is arranged in the cylindrical vertical hole, the upper end of the driving piston 08 is fixedly connected with a first snap spring 12, the top end of the cylindrical vertical hole is slidably connected with an adjusting screw 02, the upper end and the lower end of the adjusting screw 02 are respectively fixedly connected with a first return spring 17 and a second snap spring 13, a blanking cover 14 is fixedly connected between the first return spring 17 and the first snap spring 12, the bottom end of the adjusting screw 02 is fixedly connected with a spacing block 19, a braking plunger 05 is slidably connected with the driving piston 08, a first oil hole 07 is arranged on the right side of the braking plunger 05, a second oil hole 09 and a third oil hole 11 are respectively arranged on the right side of the driving piston 08, and an oil groove 10 is formed between the right side recess of the driving piston 08 and the inner wall of the braking box body, the right side of the brake box body is provided with a plug 20 for plugging an oil groove 10, the working principle of the brake box body is that oil is fed from a second oil inlet hole 04 at the left side of a driving piston 08 and is blocked upwards by a spacing block 19, so that engine oil is forced to downwards open a central hole of a brake plunger 05 to open a steel ball 06 to enter the interior of the brake plunger 05 (the engine oil moves in a single direction), due to the sealing of a sealing cover 21, the oil pressure downwards pushes the brake plunger 05, when the brake plunger 05 downwards pushes a groove where a first oil hole 07 is positioned to contact with a second oil hole 09, the brake plunger 05 starts to flow into a top end third oil hole 11 which is formed in the groove at the right side and is communicated up and down, and when the overlapping degree of the oil groove 10 and the second oil hole 09 is gradually consistent, the oil pressure enters the third oil hole 11 to be rapidly gathered at the top end of the driving piston 08 and downwards pushed by the top end to drive the piston 08, due to the limitation of a second clamp spring 13, the driving piston 08 cannot be over-stroke too large, after the oil feeding is stopped, the oil pressure influences, the first return spring 17 is reset, Drive the drive piston 08 by blanking cover 14 and first jump ring 12 and upwards reset, first jump ring 12 effectively prevents with second jump ring 13 from reducing vibrations and abnormal sound from drive piston 08 up-and-down motion in-process, it is too big to prevent effectively that the too much drive piston 08 that leads to of inside oil circuit machine oil from stretching out the volume, prevent the collision of valve and piston that drive piston 08 piston process leads to, when the inside oil pressure of stopper is higher than preset pressure, prevent effectively that stopper drive piston 08 too big stroke, avoid great damage to equipment, structure etc., mechanical structure wearing and tearing or cause not return phenomenon, lead to the braking failure.

The first oil inlet 03 is formed in the left side of the brake case, the second oil inlet 04 is formed in the left side of the driving piston 08, and the oil drain hole 18 is formed in the right side of the driving piston 08, and it should be noted that the first oil inlet 03, the second oil inlet 04 and the oil drain hole 18 are limited, so that normal engine oil inlet and outlet of the device in the brake case are ensured.

The upper end of the adjusting screw 02 is in threaded connection with an adjusting nut 01 used for adjusting the gap distance, the adjusting screw 02 penetrates through the top of the brake box body, the adjusting nut 01 and the adjusting screw 02 are arranged at the top end of a vertical hole, and the adjusting nut 01 and the adjusting screw sleeve are fixed to the top end of the brake box body after the gap is adjusted.

A steel ball 06 is movably connected at the central hole of the top in the brake plunger 05, a sealing cover 21 is fixedly connected at the bottom of the driving piston 08, a second return spring 15 is fixedly connected between the sealing cover 21 and the steel ball 06, a third return spring 16 is fixedly connected between the bottom of the brake plunger 05 and the bottom in the driving piston 08, it is noted that when the first oil inlet 03 stops oil inlet, the oil pressure in the upper space of the brake plunger 05 is reduced, the steel ball 06 in the return position of the second return spring 15 blocks the central hole of the top of the brake plunger 05, the third return spring 16 gradually returns, when the space at the bottom of the brake plunger 05 is communicated with the second oil hole 09, the engine oil returns from the original path at the right groove of the driving piston 08, and along with the continuous upward movement of the brake plunger 05, the engine oil enters the bottom cavity of the driving piston 08 and is drained by the oil drainage hole 18 at the rightmost lower corner of the driving piston 08, and the opposite work is carried out when oil inlet.

An exhaust valve rod connecting piece is arranged below the driving piston 08, a rocker arm 28 for controlling the gap distance between the rocker arm 28 and the exhaust valve rod connecting piece through an electromagnetic valve is arranged outside the braking box body, and the switching between the braking state and the normal working state is realized by controlling the gap between the rocker arm 28 and the exhaust valve rod connecting piece through the electromagnetic valve.

The exhaust valve stem connecting piece comprises a valve bridge 22 arranged below the driving piston 08, an actuating pin 23 arranged in the valve bridge 22 in a penetrating way, a brake valve 24 connected with the inner wall of the actuating pin 23 in a sliding way, a valve spring upper seat 25 fixedly connected with the outer wall of the brake valve 24, a valve spring 26 used for seating and tightly attaching the brake valve 24 in time and a cylinder head 27 connected with the outer wall of the brake valve 24 in a sliding way, it should be noted that the actuating pin 23 which drives the piston 08 to extend and retract into the valve bridge 22 abuts against the brake valve 24 to extend and retract in the cylinder head 27, the valve spring upper seat 25 limits the position in the actuating pin 23, so as to prevent the brake valve 24 from sliding out and abutting against the actuating piston 08 to influence the normal operation of the braking device, and the valve spring 26 is used for seating and tightly attaching the brake valve 24 in time to prevent the brake valve 24 from jumping and damaging the sealing performance of the engine when the engine vibrates.

Claims

1. The engine braking device integrating the check valve and the brake comprises a braking box body, a first oil inlet hole (03), a second oil inlet hole (04), an oil drainage hole (18) and a cylindrical vertical hole, and is characterized in that a driving piston (08) is arranged in the cylindrical vertical hole, a first clamp spring (12) is fixedly connected to the upper end of the driving piston (08), an adjusting screw (02) is slidably connected to the top end of the cylindrical vertical hole, a first reset spring (17) and a second clamp spring (13) are fixedly connected to the upper end and the lower end of the adjusting screw (02) respectively, a blocking cover (14) is fixedly connected between the first reset spring (17) and the first clamp spring (12), a spacing block (19) is fixedly connected to the bottom end of the adjusting screw (02), a braking plunger (05) is slidably connected to the driving piston (08), and a first oil hole (07) is arranged on the right side of the braking plunger (05), the right side of the driving piston (08) is provided with a second oil hole (09) and a third oil hole (11) respectively, an oil groove (10) is formed between the right side recess of the driving piston (08) and the inner wall of the brake box body, and a plug (20) used for plugging the oil groove (10) is installed on the right side of the brake box body.

2. The engine brake device integrating the check valve and the brake as claimed in claim 1, wherein the first oil inlet hole (03) is formed in the left side of the brake case, the second oil inlet hole (04) is formed in the left side of the driving piston (08), and the oil drain hole (18) is formed in the right side of the driving piston (08).

3. The engine braking device with the one-way valve and the brake integrated as the claim 1 is characterized in that an adjusting nut (01) used for adjusting the gap distance is connected to the upper end of the adjusting screw (02) in a threaded mode, and the adjusting screw (02) penetrates through the top of the braking box body.

4. The engine brake device integrating the one-way valve and the brake as claimed in claim 1, wherein a steel ball (06) is movably connected to a central hole at the top of the inside of the brake plunger (05), a sealing cover (21) is fixedly connected to the bottom of the driving piston (08), a second return spring (15) is fixedly connected between the sealing cover (21) and the steel ball (06), and a third return spring (16) is fixedly connected between the bottom of the brake plunger (05) and the bottom of the inside of the driving piston (08).

5. A check valve and brake integrated engine brake device according to claim 1, wherein an exhaust valve stem link is provided below the driving piston (08), and a rocker arm (28) for controlling a clearance distance from the exhaust valve stem link by a solenoid valve is provided outside the brake case.

6. The engine brake device with a one-way valve and a brake integrated as recited in claim 5, wherein the exhaust valve stem connector comprises a valve bridge (22) disposed below the driving piston (08), an actuating pin (23) disposed through the valve bridge (22), a brake valve (24) slidably coupled to an inner wall of the actuating pin (23), a valve spring upper seat (25) fixedly coupled to an outer wall of the brake valve (24), a valve spring (26) for seating and closely contacting the brake valve (24) in time, and a cylinder head (27) slidably coupled to an outer wall of the brake valve (24).