CN207177989U - A kind of swing type variable valve driving apparatus - Google Patents

Abstract

A swing-type variable valve drive device belongs to the technical field of engines. The utility model device is mainly composed of a disc, a camshaft, a limit snap ring, a pin shaft, a push rod, a stopper, a spring, a push rod sleeve, a gear, and a bell crank. Shaft, support cover a, ring block, push rod sleeve upper cover, support cover b, cam, support a, support b; The disc changes the rotation angle to realize the change of the phase. The phase change is accurate and the control mechanism is simple, which can realize the best valve timing of the engine at different speeds in a wide range, improve the intake and exhaust conditions, reduce the pumping loss, and improve the fuel utilization rate. Lower emissions. Moreover, the utility model has the advantages of simple structure and low manufacturing difficulty, and can reduce production cost.

Description

A swing variable valve drive device

technical field

The utility model belongs to the technical field of engines, more precisely, the utility model is a swing variable valve driving device.

Background technique

With the vigorous development of my country's automobile market and the continuous increase of automobile ownership, the problems of environmental pollution and energy crisis have been paid more and more attention by people. Because the valve opening and closing timing and valve lift of the traditional gasoline engine are fixed, the pumping loss is large and the fuel economy is poor at low speed and small load, and the variable valve drive technology is an effective Gasoline engine energy-saving technology can make the gasoline engine achieve the optimal air intake efficiency under different loads by changing the opening and closing time of the valve, the opening duration and the valve lift, thereby improving its thermal efficiency, reducing fuel consumption, and Improve its emission performance.

Utility model content

The purpose of the utility model is a swing-type variable valve driving device, which realizes the adjustment of the opening and closing time and duration of the engine valve, so as to meet the requirements of the gas distribution phase at different speeds of the engine, and improve the fuel economy and emission performance of the engine. variable valve drive system.

The utility model consists of a disc 1, a camshaft 2, a limit snap ring 3, a pin 4, a push rod 5, a stop seat 6, a spring 7, a push rod sleeve 8, a gear 9, a crankshaft 10, and a support cover a11 , an annular block 12, a push rod cover 13, a support cover b14, a cam 15, a support a16, and a support b17, wherein:

The disc 1 is arranged on the left end of the camshaft 2, the camshaft 2 is fixed on the center hole 101 of the disc 1, and the pin shaft 4 is fixed on the round hole 102 at the outer edge of the disc 1;

The front end ring platform 501 of the push rod 5 is set on the pin shaft 4 with clearance fit, fixed by the limit snap ring 3, and the push rod 5 can freely rotate around the pin shaft 4;

The round rod 502 at the rear end of the push rod 5 passes through the center hole of the base 6, and extends into the cavity 801 provided by the push rod sleeve 8; the round rod 502 is in clearance fit with the center hole of the base 6;

The annular stopper 12 is affixed to the top of the round rod 502 of the push rod 5, and is in clearance fit with the cavity 801 of the push rod sleeve 8;

Blocking seat 6 is threadedly connected to the lower end of push rod sleeve 8;

The spring 7 is placed between the ring block 12 and the block seat 6;

The gear 9 is fixedly connected to the central shaft section 1001 at the left end of the crankshaft 10, and is connected to the crankshaft of the engine through chain transmission, gear transmission or belt transmission, and rotates under the drive of the crankshaft;

The central shaft section 1001 of the crankshaft 10 is placed between the support cover a11 and the support a16, and the gap fits;

The crankshaft 10 crankshaft section 1002 is placed between the upper cover 13 of the push rod sleeve and the push rod sleeve 8, and is fitted with clearance;

The camshaft 2 is placed between the support cover b14 and the support b17, and has clearance fit;

The cam 15 is fixed on the outer surface of the camshaft 2;

The engine valve is placed under the cam 15 and is slidably connected;

The support cover a11 and the support a16, the upper cover 13 of the push rod sleeve and the push rod cover 8, the support cover b14 and the support b17 are respectively threaded;

The support a16 and the support cover b17 are affixed to the engine cylinder head.

The disc 1 of the utility model is provided with a central hole 101 at the center, and a round hole 102 at the outer edge.

The push rod 5 described in the utility model includes a ring platform 501 and a round rod 502 .

The push rod sleeve 8 described in the utility model is provided with a cylindrical cavity 801 and an oil passage a802, wherein the oil passage a802 communicates with the oil guide ring groove 1003 provided on the crankshaft 10, and the oil passage a802 is also connected with the round rod 502 and the annular The top end of the block 12 communicates with the oil chamber surrounded by the cylindrical cavity 801 .

The crank shaft 10 of the utility model includes a central shaft section 1001, a crank shaft section 1002, an oil guiding ring groove 1003, and an oil passage b1004, wherein the oil guiding ring groove 1003 is arranged in the middle part of the crank shaft section 1002, and is connected with the oil Road b1004 is connected.

The central shaft section 1001 of the crankshaft 10 described in the utility model is parallel to the axis lines of the crankshaft section 1002, the camshaft 2, and the pin shaft 4.

The distance between the axis lines of the camshaft 2 and the pin shaft 4 in the present invention is greater than the distance between the crankshaft 10 central axis section 1001 and the crankshaft section 1002 axes.

The working process of the present utility model is as follows:

When the engine is working normally, the gear 9 is driven to rotate by the crankshaft of the engine, which drives the crankshaft 10 central shaft section 1001 to rotate, and the crankshaft 10 crankshaft section 1002 rotates around the central shaft section 1001 at the same time. Due to the effect of the spring 7, the push rod 5 and the push rod sleeve 8 are connected together and move together. The upper end of the push rod sleeve 8 rotates around the central axis section 1001 along with the crank shaft section 1002 of the crank shaft 10 , and the ring platform 501 at the front end of the push rod 5 drives the disc 1 to rotate through the pin shaft 4 . Thereby the disc 1 drives the cam 15 to rotate through the camshaft 2, and pushes the valve to move. Since the distance between the camshaft 2 and the pin shaft 4 axis line is greater than the distance between the crankshaft 10 central axis section 1001 and the crankshaft section 1002 axes, the disc 1 can only rotate back and forth within a certain angle The movement makes the push rod sleeve 8 and the push rod 5 do the swinging motion simultaneously.

When it is necessary to change the opening time of the valve, high-pressure oil flows in from the oil passage b1004 on the crankshaft 10, and enters the round rod 502 and the top of the ring stopper 12 and the cylinder through the oil guide ring groove 1003 and the oil passage a802 on the push rod sleeve 8 The oil chamber surrounded by the circular cavity 801, the oil pressure in the oil chamber surrounded by the round rod 502 and the top of the ring stopper 12 and the cylindrical cavity 801 can be adjusted to change the pushing length of the push rod 5, thereby changing the length of the push rod 5. And the overall length of push rod cover 8. Since the relative position between the camshaft 2 and the axis end 1001 of the crankshaft 10 does not change, the disc 1 will rotate an angle, thereby changing the rotational phase between the disc 1 and the gear 9, and then Adjust the phase of the camshaft 2 to change the opening and closing timing and opening duration of the valve.

The beneficial effects brought by the technical solution provided by the utility model are:

The utility model adopts the total length of the hydraulic control push rod 5 and the push rod sleeve 8 to drive the disc 1 to change the rotation angle to realize the change of the phase, the phase change is accurate, and the control mechanism is simple. The variable range is large, so the range of the control phase is large, which can realize the optimal valve timing of the engine at different speeds in a wide range, improve the intake and exhaust conditions, reduce pumping loss, improve fuel utilization, and reduce emissions. Moreover, the utility model has the advantages of simple structure and low manufacturing difficulty, and can reduce production cost.

Description of drawings

Accompanying drawing 1 is a kind of swing type variable valve driving device

Accompanying drawing 2 is the left side view of A-A section

Accompanying drawing 3 is the right side view of B-B section

Accompanying drawing 4 is the left side view of C-C section

Accompanying drawing 5 is the schematic diagram of disc 1

Accompanying drawing 6 is the schematic diagram of push rod 5

Accompanying drawing 7 is the schematic diagram of push rod cover 8

Accompanying drawing 8 is the schematic diagram of crankshaft 10

Accompanying drawing 9 is a schematic diagram of the combined state of the valve and the cam when the valve is closed in the long valve opening duration state

Accompanying drawing 10 is a schematic diagram of the combination state of the valve and the cam when the valve is closed in the short valve opening duration state

Accompanying drawing 11 is the schematic diagram of the change of the valve lift with the crankshaft angle under the state of long and short valve opening duration

Among them, 1 disc; 2 camshaft; 3 limit snap ring; 4 pin shaft; 5 push rod; 6 block seat; 7 spring; 8 push rod sleeve; 9 gear; 12 ring block; 13 push rod cover; 14 support cover b; 15 cam; 16 support a; 17 support b.

Detailed ways

Below in conjunction with accompanying drawing 1-10 the utility model is described in detail.

Referring to attached drawings 1, 2, 3:

The utility model consists of a disc 1, a camshaft 2, a limit snap ring 3, a pin 4, a push rod 5, a stop seat 6, a spring 7, a push rod sleeve 8, a gear 9, a crankshaft 10, and a support cover a11 , Ring block 12, push rod cover upper cover 13, support cover b14, cam 15, support a16, support b17.

Referring to accompanying drawings 1, 2, 5:

The disc 1 of the utility model is provided with a central hole 101 at the center, and a round hole 102 at the outer edge. The disk 1 is arranged on the left end of the camshaft 2, the camshaft 2 is affixed to the center hole 101 of the disk 1, and the pin shaft 4 is affixed to the circular hole 102 at the outer edge of the disk 1.

Referring to accompanying drawings 1, 2, 6, 7:

The push rod 5 described in the utility model includes a ring platform 501 and a round rod 502 . The push rod sleeve 8 is provided with a cylindrical cavity 801 and an oil passage a802, wherein the oil passage a802 communicates with the oil guiding ring groove 1003 provided on the crankshaft 10, and the oil passage a802 is also connected with the round rod 502 and the top end of the ring block 12 and The oil chambers surrounded by the cylindrical cavity 801 communicate with each other. The front end ring platform 501 of the push rod 5 is sleeved on the pin shaft 4 with clearance fit, fixed by the limit snap ring 3, and the push rod 5 can freely rotate around the pin shaft 4. The rear end round rod 502 of the push rod 5 passes through the central hole of the base 6 and extends into the cavity 801 provided by the push rod sleeve 8 . The round rod 502 is in clearance fit with the center hole of the base 6 . The annular stopper 12 is fixedly connected to the top end of the round rod 502 of the push rod 5 , and is in clearance fit with the cavity 801 of the push rod sleeve 8 . The block seat 6 is connected to the lower end of the push rod sleeve 8 by threads. The spring 7 is placed between the ring block 12 and the block seat 6 .

Referring to accompanying drawings 1, 2, 3, 7, 8:

The crank shaft 10 of the utility model includes a central shaft section 1001, a crank shaft section 1002, an oil guiding ring groove 1003, and an oil passage b1004, wherein the oil guiding ring groove 1003 is arranged in the middle part of the crank shaft section 1002, and is connected with the oil Road b1004 is connected. The gear 9 is fixedly connected to the central shaft section 1001 at the left end of the crankshaft 10, and is connected with the crankshaft of the engine through chain transmission, gear transmission or belt transmission, and rotates under the crankshaft drive. The central shaft section 1001 of the crankshaft 10 is placed between the support cover a11 and the support a16, and has a clearance fit. The crankshaft section 1002 of the crankshaft 10 is placed between the upper cover 13 of the pushrod sleeve and the pushrod sleeve 8, and is fitted with a clearance.

Referring to accompanying drawings 1, 2, 4:

The camshaft 2 described in the present invention is placed between the support cover b14 and the support b17, and is fitted with clearance. The cam 15 is affixed to the outer surface of the camshaft 2 . The engine valves are placed below the cam 15 and are slidably connected.

Referring to attached drawings 1, 2, 3:

According to the utility model, the support cover a11 and the support a16, the upper cover 13 of the push rod sleeve and the push rod cover 8, and the support cover b14 and the support b17 are respectively connected by threads. The support a16 and the support cover b17 are affixed to the engine cylinder head.

Referring to attached drawings 1 and 2:

The central shaft section 1001 of the crankshaft 10 described in the utility model is parallel to the axis lines of the crankshaft section 1002, the camshaft 2, and the pin shaft 4. The distance between the axis lines of the camshaft 2 and the pin shaft 4 is greater than the distance between the axes of the crankshaft 10 central axis section 1001 and the crankshaft section 1002 .

Referring to accompanying drawings 9, 10, 11:

When the combined position of the camshaft 15 and the valve described in the present invention is shown in Figure 9, the corresponding valve generates a curve A as shown in Figure 11 as the crankshaft angle changes, and the valve opening duration is longer. When the phase of the camshaft 2 is changed so that the combined position of the cam 15 and the valve is as shown in Figure 10, the corresponding valve generates a curve B as shown in Figure 11 as the crank angle changes, and the valve opening duration is relatively short.

The engine adjusts the opening and closing time and opening duration of the valve, which is realized by the above-mentioned control device, specifically: when the engine is working normally, the gear 9 is driven to rotate by the crankshaft of the engine, which drives the crankshaft 10 central shaft section 1001 to rotate, and the crankshaft simultaneously The crank shaft segment 1002 of the shaft 10 rotates around the central shaft segment 1001 . Due to the effect of the spring 7, the push rod 5 and the push rod sleeve 8 are connected together and move together. The upper end of the push rod sleeve 8 rotates around the central axis section 1001 along with the crank shaft section 1002 of the crank shaft 10 , and the ring platform 501 at the front end of the push rod 5 drives the disc 1 to rotate through the pin shaft 4 . Thereby the disc 1 drives the cam 15 to rotate through the camshaft 2, and pushes the valve to move. Since the distance between the camshaft 2 and pin shaft 4 axis lines is greater than the distance between the crankshaft 10 central axis section 1001 and the crankshaft section 1002 axes, the disc 1 can only rotate back and forth within a certain angle The movement makes the push rod sleeve 8 and the push rod 5 do the swinging motion simultaneously.

When it is necessary to change the opening time of the valve, high-pressure oil flows in from the oil passage b1004 on the crankshaft 10, and enters the round rod 502 and the top of the ring stopper 12 and the cylinder through the oil guide ring groove 1003 and the oil passage a802 on the push rod sleeve 8 The oil chamber surrounded by the circular cavity 801, the oil pressure in the oil chamber surrounded by the round rod 502 and the top of the ring stopper 12 and the cylindrical cavity 801 can be adjusted to change the pushing length of the push rod 5, thereby changing the length of the push rod 5. And the overall length of push rod cover 8. Since the relative position between the camshaft 2 and the axis end 1001 of the crankshaft 10 does not change, the disc 1 will rotate an angle, thereby changing the rotational phase between the disc 1 and the gear 9, and then Adjust the phase of the camshaft 2 to change the opening and closing timing and opening duration of the valve.

Claims (7)

1. A kind of 1. swing type variable valve driving apparatus, by disk (1), camshaft (2), limited location snap ring (3), bearing pin (4), push rod (5), block seat (6), spring (7), pushing rod sleeve (8), gear (9), crank shaft (10), support seat cover a (11), collar stop (12), push away (13), support seat cover b (14), cam (15), bearing a (16), bearing b (17) compositions are covered in rod set, wherein

   Disk (1) is arranged in camshaft (2) left end, and camshaft (2) is fixed on disk (1) centre bore (101), and bearing pin (4) is solid It is connected on the circular hole (102) at disk (1) outer rim；

   Push rod (5) front end land (501) is sleeved on bearing pin (4), and gap coordinates, and push rod (5) can rotate freely around bearing pin (4)； Push rod (5) rear end round bar (502) passes through the centre bore of base (6), and extend into the cavity (801) that pushing rod sleeve (8) opens up；Circle The center interporal lacuna of bar (502) and base (6) coordinates；

   Collar stop (12) is fixed in round bar (502) top of push rod (5), and matches somebody with somebody with cavity (801) gap of pushing rod sleeve (8) Close；

   Block seat (6) is threadedly attached in pushing rod sleeve (8) lower end；

   Spring (7) is placed between collar stop (12) and block seat (6)；

   Gear (9) is fixed on the central axis segment a (1001) of crank shaft (10) left end, and passes through Chain conveyer, gear drive or band The modes such as transmission are connected with engine crankshaft, are rotated under bent axle driving；

   Crank shaft (10) central axis segment (1001) is placed between support seat cover a (11) and bearing a (16), and gap coordinates；Crank shaft (10) crank throw shaft part (1002) is placed on pushing rod sleeve and covered between (13) and pushing rod sleeve (8), and gap coordinates；

   Camshaft (2) is placed between support seat cover b (14) and bearing b (17), and gap coordinates；Cam (15) is fixed in camshaft (2) outer surface；Engine valve is placed in below cam (15), and is slidably connected；

   (13) are covered on support seat cover a (11) and bearing a (16), pushing rod sleeve with pushing rod sleeve (8), support seat cover b (14) and bearing b (17) to divide It is not connected through a screw thread；Bearing a (16) and support seat cover b (17) are fixed in engine cylinder and covered.
2. A kind of 2. swing type variable valve driving apparatus as described in claim 1, it is characterised in that described disk (1) center Position is provided with centre bore (101), and circular hole (102) is provided with outer rim.
3. 3. a kind of swing type variable valve driving apparatus as described in claim 1, it is characterised in that described push rod (5) includes Land (501) and round bar (502).
4. 4. a kind of swing type variable valve driving apparatus as described in claim 1, it is characterised in that described pushing rod sleeve (8) is set There are cylindrical cavity (801) and oil duct a (802), wherein oil duct a (802) and the Oil Guide annular groove opened up on crank shaft (10) (1003) communicate, the oil that oil duct a (802) also surrounds with round bar (502) and collar stop (12) top and cylindrical cavity (801) Chamber communicates.
5. A kind of 5. swing type variable valve driving apparatus as described in claim 1, it is characterised in that described crank shaft (10) Including central axis segment (1001), crank throw shaft part (1002), Oil Guide annular groove (1003), wherein oil duct b (1004), Oil Guide annular groove (1003) crank throw shaft part (1002) middle part is located at, and is communicated with oil duct b (1004).
6. A kind of 6. swing type variable valve driving apparatus as described in claim 1, it is characterised in that described crank shaft (10) Central axis segment (1001) and crank throw shaft part (1002), camshaft (2), the axis parallel of bearing pin (4) four.
7. 7. a kind of swing type variable valve driving apparatus as described in claim 1, it is characterised in that the camshaft (2) and pin Spacing between axle (4) axial line be more than between crank shaft (10) central axis segment (1001) and crank throw shaft part (1002) axis away from From.