CN204783153U - A variable rocking arm of two -stage for engine - Google Patents

Abstract

The utility model provides a variable rocking arm of two -stage for engine, including quiet rocking arm (2), reset spring seat (3), lockpin (9) and shake arm (10), lockpin (9) are two segmentation step axles including lockpin work end (91) and lockpin installation end (93), lockpin work end (91) external diameter is greater than lockpin installation end (93) external diameter, set up lockpin mounting hole (22) and reset spring seat mounting groove (23) on quiet rocking arm (2), lockpin work end (91) slides with lockpin mounting hole (22) and cup joints, set up between reset spring seat mounting groove (23) that the slip was cup jointed and reset spring seat (3) reset spring (4). The utility model discloses can cancel traditional external torsional spring mode to the increase that makes lockpin work end external diameter easily realizes, thereby has alleviateed the quality of rocking arm, avoids better having improved the operational reliability of rocking arm because of the lockpin takes place the rocking arm thrashing that plastic deformation can't the return leads to.

Description

A kind of two-stage variable rocking arm for motor

Technical field

The utility model relates to engine rocker technical field, especially relates to a kind of two-stage variable rocking arm for motor.

Background technique

Two-stage variable valve lift technology can make motor under different rotating speeds, mate high or low valve stroke amount selectively, exports, and promote the power stage of motor when high rotating speed to promote the moment of torsion of motor when low speed further.When motor runs at high rotating speed, select the larger valve stroke amount of coupling can increase gettering quantity significantly, thus power stage when improving motor height rotating speed; When motor runs in the slow-speed of revolution, select the less valve stroke amount of coupling can improve the velocity of combustion of fuel oil, thus moment of torsion when improving low engine speeds export.

The rocking arm of the existing variable valve lift system for motor adopts two-stage variable rocking arm, this two-stage variable rocking arm is as the core component of the variable valve lift system of motor, it controls rocking arm lock pin driving mechanism according to the control signal that engine controller sends, and by the opening of lock pin, high and low lift condition that lockup state controls rocking arm, thus reach the object controlling valve lift within the scope of two-stage.There is following defect in the course of the work in existing two-stage variable rocking arm:

First, in existing two-stage variable rocking arm, the working end diameter of lock pin is wherein subject to the impact of lock pin mounting end diameter and lock pin reset space, directly cannot solve the plastic deformation problem of lock pin by increasing diameter, therefore, lock pin is easy to cause lock pin to lose efficacy because of plastic deformation.In addition, because lock pin main body and lock pin spring seat are integrated manufacturing, its processing technology more complicated, difficulty of processing is comparatively large, causes the processing cost of lock pin higher.

The second, in existing two-stage variable rocking arm, the resetting means shaking arm generally adopts external torsion spring mode, is unfavorable for the layout in space, and adds rocking arm quality.

Model utility content

The technical problems to be solved in the utility model is: for prior art Problems existing, a kind of two-stage variable rocking arm for motor is provided, lock pin can not only be avoided because of plastic deformation to cause the problem lost efficacy, and compact structure, rocking arm quality can be alleviated.

The technical problems to be solved in the utility model realizes by the following technical solutions: a kind of two-stage variable rocking arm for motor, comprise quiet rocking arm, lock pin and shake arm, described quiet rocking arm with shake arm activity pivot joint, described lock pin is two-part Step Shaft, comprise the lock pin working end and lock pin mounting end that are fixedly connected into T-shaped structure, and the external diameter of lock pin working end is greater than the external diameter of lock pin mounting end, quiet rocking arm is offered lock pin mounting hole and return spring holder mounting groove, be slidably socketed between described lock pin working end and lock pin mounting hole, be slidably socketed between described return spring holder mounting groove and return spring holder, between return spring holder mounting groove and return spring holder, Returnning spring is set.

Preferably, be that integrated molding connects between described lock pin working end and lock pin mounting end.

Preferably, also comprise lock pin spring seat, described lock pin mounting end be fixedly connected with interference fit or welding manner between lock pin spring seat.

Preferably, described return spring holder is offered the second oil inlet hole, mutually through between described second oil inlet hole and return spring holder mounting groove.

Preferably, the second described oil inlet hole is the radial direction through hole communicated with return spring holder inner chamber.

Preferably, described return spring holder arranges convex shoulder, described second oil inlet hole, between convex shoulder and return spring holder bottom lock end, forms circular groove at convex shoulder place between described return spring holder and quiet rocking arm.

Preferably, the second described oil inlet hole arranges several, and the second oil inlet hole is all positioned at the same radial plane of return spring holder.

Preferably, described quiet rocking arm is offered the second oily passage, mutually through between described second oil inlet hole and the second oily passage, and the second oily channel outlet to contact R face with valve stem with quiet rocking arm through.

Preferably, the center line of the second described oil inlet hole, the second oily passage is in the same plane.

Preferably, described lock pin working end is arranging the lock pin pressing portion of conical round table shape on lock pin mounting end bearing of trend, and the end face of described lock pin pressing portion relatively small end is lock pin blocked part.

Compared with prior art, the beneficial effects of the utility model are: the installing space effectively can liberating lock pin, increase the activity space of lock pin, external diameter due to lock pin working end is greater than the external diameter of lock pin mounting end, the increase of the external diameter of lock pin working end is not by the restriction of lock pin mounting end arrangement space, thus make the increase of lock pin working end external diameter be easy to realize, be more prone to the rigidity improving lock pin working end, reduce the risk that plastic deformation occurs in lock pin working end, therefore, to avoid because of lock pin generation plastic deformation and cannot lose efficacy by the rocker arm system that causes of return, improve functional reliability and the operating life of two-stage variable rocking arm, and structure is simple, implementation cost is cheap, the resetting-mechanism shaking arm is jointly formed by return spring holder mounting groove, return spring holder and Returnning spring, thus traditional external torsion spring mode can be cancelled, be conducive to rocking arm integrally-built compact, alleviate the quality of rocking arm, efficiently reduce the inertia of rocking arm and take up room.

Accompanying drawing explanation

Fig. 1 is the plan view of a kind of two-stage variable rocking arm for motor of the utility model.

Fig. 2 is the plan view of a kind of two-stage variable rocking arm for motor of the utility model.

Fig. 3 is the tectonic maps of quiet rocking arm in Fig. 1.

Fig. 4 is the tectonic maps of return spring holder in Fig. 1.

Fig. 5 is the tectonic maps of lock pin in Fig. 1.

Mark in figure: 1-locating stud, the quiet rocking arm of 2-, 3-return spring holder, 4-Returnning spring, the quiet rocking arm of 5-contacts R face with valve stem, 6-roller, 7-bearing pin, 8-needle roller, 9-lock pin, 10-shakes arm, 11-lock pin shoe cream room, 12-lock pin spring, 13-lock pin spring seat, 14-circular groove, 21-first oil inlet hole, 22-lock pin mounting hole, 23-return spring holder mounting groove, the oily passage of 24-second, 31-convex shoulder, 32-second oil inlet hole, 91-lock pin working end, 92-lock pin blocked part, 93-lock pin mounting end, 94-lock pin pressing portion, 101-shakes arm crossbeam.

Embodiment

In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with the drawings and specific embodiments, the utility model is described in detail.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.

A kind of two-stage variable rocking arm for motor as shown in Figure 1 and Figure 2, mainly comprise quiet rocking arm 2, return spring holder 3, lock pin 9 and shake arm 10, coffin is provided with between described two tracks shaking arm 10, for placing quiet rocking arm 2 and roller 6, quiet rocking arm 2 wherein with shake that become by locating stud 1 pivot joint between arm 10 can rocker body in relative rotation, described quiet rocking arm 2 central part and bearing pin 7 are riveted fixing mutually, described bearing pin 7 forms roll wheel assembly jointly with roller 6, needle roller 8, and described needle roller 8 is between bearing pin 7 and roller 6.As shown in Figure 3, quiet rocking arm 2 offers the lock pin mounting hole 22 laying respectively at roller 6 both sides and return spring holder mounting groove 23, the socket arrangement place contacted with each other at quiet rocking arm 2 and tappet offers the first oil inlet hole 21, described first oil inlet hole 21 communicates with between lock pin mounting hole 22, quiet rocking arm 2 is also offered the second oily passage 24, described second oily passage 24 entrance point communicates with return spring holder mounting groove 23, and described second oily passage 24 outlet end to contact R face 5 with quiet rocking arm with valve stem through; Described return spring holder mounting groove 23 is slidably socketed with return spring holder 3, Returnning spring 4 is set between return spring holder mounting groove 23 and return spring holder 3, by Returnning spring 4, the closed end of return spring holder 3 is connected with the Contact shaking arm crossbeam 101 shaken on arm 10.Jointly constituted by return spring holder mounting groove 23, return spring holder 3 and Returnning spring 4 and shake arm 10 reset assembly, namely, when shaking arm 10 and rotating clockwise relative to quiet rocking arm 2, shake arm crossbeam 101 oppress return spring holder 3 and make Returnning spring 4 by compressive strain, Returnning spring 4 after compressive strain will produce reciprocal elastic force to shaking arm crossbeam 101, can normal reset to make shaking arm 10.The resetting means shaking arm 10 adopts said structure, can cancel traditional external torsion spring mode, thus advantageously integrally-built compact in rocking arm, and alleviates the quality of rocking arm.

As shown in Figure 4, the hollow circular cylinder shape that described return spring holder 3 is closed in one end, return spring holder 3 offers the second oil inlet hole 32, and described second oil inlet hole 32 is the radial direction through hole communicated with return spring holder 3 inner chamber.As shown in Figure 5, described lock pin 9 is two-part Step Shaft, connects into T-shaped structure by lock pin working end 91, the lock pin mounting end 93 being cylindrical structure by integrated molding, and the external diameter of lock pin working end 91 is greater than the external diameter of lock pin mounting end 93.The valve lift that lock pin 9 forms rocking arm jointly with lock pin spring seat 13, lock pin spring 12 switches lock pin assembly, lock pin working end 91 is wherein slidably socketed with lock pin mounting hole 22, described lock pin mounting end 93 is fixedly connected with interference fit or welding manner with between lock pin spring seat 13, installs the lock pin spring 12 be socketed with lock pin mounting end 93 between lock pin spring seat 13 and lock pin working end 92.Adopt the valve lift of this split-type structural to switch lock pin assembly, not only make lock pin 9 more simple with the processing of lock pin spring seat 13, processing cost is lower, and, assemble convenient.

In addition, lock pin 9 is also provided with round table-like lock pin pressing portion 94.External diameter due to lock pin working end 91 is greater than the external diameter of lock pin mounting end 93, therefore, can by lock pin working end 91 in the lock pin pressing portion 94 directly processing a conical round table shape on lock pin mounting end 93 bearing of trend, the conical surface of this lock pin pressing portion 94 is the stress surface of lock pin pressing portion 94, the end face of the relatively small end of this lock pin pressing portion 94 is lock pin blocked part 92, as shown in Figure 5.Lock pin 9 adopts such structure that the structure of lock pin 9 can be made simple, compact, and easy processing, processing cost is low.Lock pin shoe cream room 11 is formed, as shown in Figure 1 between lock pin pressing portion 94 wherein and lock pin mounting hole 22.The first described oil inlet hole 21 communicates with lock pin shoe cream room 11, the lubrication channel of through composition rocking arm successively between the second described oil inlet hole 32, the oily passage 24 of return spring holder mounting groove 23, second.

Rocking arm of the present utility model in the course of the work, be slidably socketed between lock pin working end 91 wherein and lock pin mounting hole 22, quiet rocking arm 2 is by locating stud 1 and shake arm 10 pivot joint rotatably, therefore, after hydraulic oil enters lock pin shoe cream room 11 from the first oil inlet hole 21, the oil pressure of hydraulic oil acts on lock pin pressing portion 94, if the axial oil pressure that lock pin pressing portion 94 is born exceedes the elastic force of lock pin spring 12, slide in the space limited at lock pin mounting hole 22 to the right relative to quiet rocking arm 2 in lock pin working end 91.When the hydraulic oil pressure in lock pin shoe cream room 11 reduces, the axial oil pressure that lock pin pressing portion 94 is born also decreases, lock pin 9 slides left relative to quiet rocking arm 2 under the Flexible Reset power effect of lock pin spring 12, namely lock pin pressing portion 94 and quiet rocking arm 2 can be effectively avoided direct contact impact to occur, to ensure the functional reliability of lock pin 9 by lock pin blocked part 92.The lock pin assembly jointly be made up of lock pin 9 and lock pin spring seat 13, lock pin spring 12 just can pass through to change from the oil pressure of the hydraulic oil of outside and locking or open, to realize shaking arm 10 static and relative movement two kinds of working staties relative to quiet rocking arm 2.When lock pin 9 is in released state, shaking arm 10 can realize shaking arm 10 by the reset of extreme lower position to extreme higher position by the Flexible Reset power of Returnning spring 4.

Because the second oil inlet hole 32 is the radial direction through hole communicated with return spring holder 3 inner chamber, therefore, a part for lubricant oil above it can be splashed in return spring holder 3 inner chamber by the second oil inlet hole 32 by roller 6, simultaneously, also another part of the lubricant oil above it is splashed return spring holder 3 with the gap in quiet rocking arm 2 relative sliding contact face, to lubricate the relative sliding contact face between return spring holder 3 and quiet rocking arm 2, thus the frictional loss alleviated between return spring holder 3 and quiet rocking arm 2, be conducive to improving the reliability and durability that shake arm 10 reset assembly mechanism.The lubricant oil entered in return spring holder 3 inner chamber flows out to quiet rocking arm by the slow guiding of the second oily passage 24 again and contacts on R face 5 with valve stem, thus with valve stem, R face 5 is contacted to quiet rocking arm effectively lubricate, therefore, effectively alleviate frictional loss in rocking arm working procedure and contact kinetic energy loss, improve the wearing and tearing durability degree of rocking arm, improve the working environment of rocking arm and valve tappet.

In quiet rocking arm 2, because the second oily passage 24 to be arranged on bottom return spring holder mounting groove 23 and to contact R face 5 near quiet rocking arm with valve stem, this second oily passage 24 one end has been communicated with return spring holder 3 intracavity bottom, to ensure that lubricant oil in return spring holder 3 inner chamber can complete directed outflow, lubricant oil is avoided to store within return spring holder mounting groove 23, this second oily passage 24 the other end is then communicated with quiet rocking arm and contacts R face 5 with valve stem but do not contact R face 5 by this quiet rocking arm with valve stem, therefore, and that go out lubricant oil directed by the second oily passage 24 slowly infiltrates and contacts R face 5 to this quiet rocking arm with valve stem under the effect of gravity with rocking arm oscillating motion, sufficient lubrication is subject to make it.

The center line of the oily passage 24 of the second oil inlet hole 32, second in the utility model is preferably in the same plane, can ensure that the flow velocity of the lubricant oil in rocking arm lubrication channel is even like this, improve the lubrication effect of rocking arm.It should be noted that, if do not carry out anti-rotation design between return spring holder 3 and return spring holder mounting groove 23, in rocking arm working procedure, return spring holder 3 can rotate around return spring holder mounting groove 23 center line relative to return spring holder mounting groove 23, this no longer aims at roller 6 direction by making the through hole direction of the second oil inlet hole 32, thus finally make quiet rocking arm contact with valve stem on R face 5 can not to receive enough lubricant oil, have impact on lubrication effect.For this reason, as shown in Figure 4, convex shoulder 31 can be set on return spring holder 3, described second oil inlet hole 32 is between convex shoulder 31 and return spring holder 3 bottom lock end, namely circular groove 14 can be formed at convex shoulder 31 place between return spring holder 3 and quiet rocking arm 2, described circular groove 14 communicates with the second oil inlet hole 32, as shown in Figure 1; Meanwhile, the second described oil inlet hole 32 arranges several, and the second oil inlet hole 32 is all positioned at the same radial plane of return spring holder 3.Adopt such structural design, lubricant oil can be made finally to be directed to one or more the second oil inlet hole 32 by circular groove 14, and enter in return spring holder 3 inner chamber by the second oil inlet hole 32, final outflow from the second oily passage 24 carries out effectively lubricating to contact R face 5 to quiet rocking arm with valve stem, meanwhile, the lubricant oil be in circular groove 14 also can lubricate the relative sliding contact face between return spring holder 3 and quiet rocking arm 2 fully.But it should be noted that the quantity of increase by second oil inlet hole 32, the manufacture cost of return spring holder 3 can be made to increase, also can reduce the mechanical strength of return spring holder 3 simultaneously.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; it should be pointed out that all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.

Claims (10)

1. the two-stage variable rocking arm for motor, comprise quiet rocking arm (2), lock pin (9) and shake arm (10), described quiet rocking arm (2) with shake arm (10) activity pivot joint, it is characterized in that: described lock pin (9) is two-part Step Shaft, comprise the lock pin working end (91) and lock pin mounting end (93) that are fixedly connected into T-shaped structure, and the external diameter of lock pin working end (91) is greater than the external diameter of lock pin mounting end (93), quiet rocking arm (2) is offered lock pin mounting hole (22) and return spring holder mounting groove (23), be slidably socketed between described lock pin working end (91) and lock pin mounting hole (22), be slidably socketed between described return spring holder mounting groove (23) and return spring holder (3), Returnning spring (4) is set between return spring holder mounting groove (23) and return spring holder (3).

2. a kind of two-stage variable rocking arm for motor according to claim 1, is characterized in that: be that integrated molding connects between described lock pin working end (91) and lock pin mounting end (93).

3. a kind of two-stage variable rocking arm for motor according to claims 1 or 2, it is characterized in that: also comprise lock pin spring seat (13), described lock pin mounting end (93) be fixedly connected with interference fit or welding manner between lock pin spring seat (13).

4. a kind of two-stage variable rocking arm for motor according to claims 1 or 2, it is characterized in that: described return spring holder (3) offers the second oil inlet hole (32), mutually through between described second oil inlet hole (32) and return spring holder mounting groove (23).

5. a kind of two-stage variable rocking arm for motor according to claim 4, is characterized in that: described the second oil inlet hole (32) is the radial direction through hole communicated with return spring holder (3) inner chamber.

6. a kind of two-stage variable rocking arm for motor according to claim 4, it is characterized in that: described return spring holder (3) arranges convex shoulder (31), described second oil inlet hole (32) is positioned between convex shoulder (31) and return spring holder (3) bottom lock end, forms circular groove (14) between described return spring holder (3) and quiet rocking arm (2) at convex shoulder (31) place.

7. a kind of two-stage variable rocking arm for motor according to claim 5 or 6, it is characterized in that: described the second oil inlet hole (32) arranges several, and the second oil inlet hole (32) is all positioned at the same radial plane of return spring holder (3).

8. a kind of two-stage variable rocking arm for motor according to claim 4, it is characterized in that: described quiet rocking arm (2) is offered the second oily passage (24), mutually through between described second oil inlet hole (32) and the second oily passage (24), and the second oily passage (24) outlet to contact R face (5) with valve stem with quiet rocking arm through.

9. a kind of two-stage variable rocking arm for motor according to claim 8, is characterized in that: the center line of described the second oil inlet hole (32), the second oily passage (24) is in the same plane.

10. a kind of two-stage variable rocking arm for motor according to claim 1, it is characterized in that: described lock pin working end (91) is arranging the lock pin pressing portion (94) of conical round table shape on lock pin mounting end (93) bearing of trend, the end face of described lock pin pressing portion (94) relatively small end is lock pin blocked part (92).