CN208816199U - A kind of modified double mode hydraulic tappet - Google Patents

Abstract

The utility model provides a kind of modified double mode hydraulic tappet, belongs to mechanical manufacturing field.It includes shell and cylinder that structure design, which improves,.It could be with the extension service life in order to improve using for product, the shell structure is that one section long 13mm wide 3.5mm depth 0.9mm bar shaped keyway is equipped on inner hole wall, length dimension effect is to place restrictions on axial movement distance, width dimensions effect is to place restrictions on radial rotary angle, is to constrain steel ball and prevent the difficulty of processing that falls off and reduce using circular shape keyway；The column structure is a ball-and-socket to be equipped at outer circle, and a steel ball is placed in ball-and-socket；Steel ball effect is to place restrictions on cylinder radial rotary in housing bore, avoid between cylinder and shell because caused by phase mutual friction gap increase and delay, and cylinder can only move along a straight line in housing bore can improve the sensitivity of product.The structure design of the utility model is reasonable according to described above, and structure is simple, improves product service performance and service life, perfect product design.

Description

A kind of modified double mode hydraulic tappet

Technical field

The utility model patent is related to a kind of modified double mode hydraulic tappet, belongs to the technical field of machine-building.

Background technique

Double mode hydraulic tappet is one kind of automobile engine cylinder stopping technique, and the purpose is to saving fuel oils.Double mode is hydraulic Tappet effect is the switching of the high underload of engine, i.e., closes partial cylinders in the whole cylinders of high load capacity opening, underload, from And it is effectively saved the engine technology of fuel oil.And the switching of high underload is to push cylinder in shell by engine interior pressure Interior movement is realized.

The structure of current double mode hydraulic tappet is without the function of placing restrictions on cylinder rotation, as tappet is long-term in engine Work, there are three types of mobile working modes for cylinder: 1, cylinder is mobile to reciprocating linear in housing bore inner shaft；2, cylinder is in housing bore Band radial rotary moves back and forth；3, (1) and (2) two kinds of operating modes alternately occur.Axial reciprocating linear movement operating mode is special Point is: stroke is short, sensitivity is good.The characteristics of band radial rotary moves back and forth operating mode is: moving back and forth stroke and increases and hinder Power increases, and has led to shell inner hole and cylinder outer circle quick abrasion, noise occurs and increases and appearance situations such as performance delay.Through skill Art is analyzed and the two version is carried out installation performance detection, and the structure for not placing restrictions on cylinder rotation function cannot prevent cylinder in shell Reciprocal radial rotary situation of movement occurs in body opening, it was demonstrated that there are design defect for structure, it is difficult to meet service performance demand.

Summary of the invention

The purpose of the utility model is to provide a kind of designs rationally, and structure is simple, improves product service performance and service life, complete Kind product design demand.

A kind of modified double mode hydraulic tappet includes: shell (1), cylinder (2), steel ball (3), ball-and-socket (4), bar shaped key Slot (5).Steel ball (3) is assemblied on cylinder ball-and-socket (4) to be aligned at shell bar shaped keyway (5) center and be packed into, it is characterized in that: in shell (1) inner hole wall is equipped with the bar shaped keyway (5) of 13mm wide 3.5mm depth 0.9mm one section long, apart from cylinder (2) aperture outer circle 2mm Place is equipped with the ball-and-socket (4) that a depth is 0.9mm, and steel ball (3) is placed in ball-and-socket (4), places restrictions on cylinder by steel ball (3) (2) radial rotary in shell (1) hole, so as to avoid between cylinder and shell because caused by mutual radial motion abrasion and Resistance.

Further, the upper end inner wall of shell is equipped with vertical bar shaped keyway, and cylindrical member is equipped with ball-and-socket, and steel ball is set to In ball-and-socket, and it can slide axially in bar shaped keyway.

Further, cylinder radial rotary in housing bore is placed restrictions on by steel ball, so as to avoid cylinder and shell it Between because of abrasion and resistance caused by mutual radial motion, and shorten cylinder in the intracorporal stroke of shell, allow to become cylinder operation sensitiveer.

The beneficial effects of the utility model are: keyway using circular shape design, its advantage is that the processing is simple, it is at low cost, It is restrictive to the steel ball after assembly preferable.

The beneficial effects of the utility model are: using socket designs scheme, its advantage is that the slickness of spherical surface, energy is utilized Be effectively ensured steel ball in ball-and-socket activity freely.

The beneficial effects of the utility model are: using a steel ball structure is placed in ball-and-socket, its advantage is that steel ball is utilized The slickness of spherical surface, steel ball follows cylinder mobile when work, can effectively roll, and steel ball rolling just reduces ball-and-socket, steel The coefficient of friction of relative motion between ball, bar shaped keyway three, and then reduce resistance, flexibility preferably can guarantee use again Service life.

Occur in housing inner diameter to moving in rotation the beneficial effects of the utility model are: placing restrictions on cylinder, makes its cylinder can only It axially moves linearly in shell, improves service life and sensitivity, ensured the normal switching of the high underload of cylinder.

Detailed description of the invention

FIG. 1 is a schematic structural view of the utility model；Fig. 2 is new hull structural schematic diagram；Fig. 3 is that novel column structure shows It is intended to.

In figure: 1- shell, 2- cylinder, 3- steel ball, 4- ball-and-socket, 5- bar shaped keyway, 6- gasket.

Specific embodiment

As shown in Figure 1, being mainly made of shell 1, cylinder 2, steel ball 3 in the present embodiment, and bar shaped is equipped in shell respectively Keyway 5 and cylinder are equipped with ball-and-socket 4.Bar shaped keyway 5 designs on the inner hole wall in shell apart from aperture, flat with casing center axis Row is the bar shaped keyway of 13mm wide 3.5mm depth 0.9mm one section long, and length dimension effect is to place restrictions on axial movement distance, width Size effect is to place restrictions on radial rotary angle, is to constrain steel ball and prevent the difficult processing that falls off and reduce using circular shape keyway Degree；For the design of ball-and-socket 4 in distance post body orifice outer circle at 2mm, ball-and-socket diameter 1.7mm, ball-and-socket depth is 0.9mm, and effect is Place steel ball；1.6 steel ball 3 of Φ is placed in ball-and-socket, and steel ball effect is the radial rotary for placing restrictions on cylinder.

Ball-and-socket is detached from when to prevent steel ball working, ball-and-socket depth dimensions must be greater than steel ball size；Ball-and-socket depth dimensions Having to be larger than steel ball size with bar shaped key slot depth scale cun additive value and being greater than value should ensure that between 0.1- 0.2mm.

It is in assembly method in the present embodiment: first by the assembly of 1.6 steel ball of Φ in the ball-and-socket on cylinder outer diameter, steel ball alignment At shell bar shaped key slot center, then push cylinder that cylinder and steel ball are packed into housing bore.Pass through steel ball, ball-and-socket, bar shaped keyway Cylinder radial rotary in housing bore is placed restrictions on.

The foregoing is merely the utility model is described in more detail, it is not intended to limit the utility model, it is all practical at this Made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the utility model within novel spirit and principle Within the scope of shield.

Claims (3)

1. a kind of modified double mode hydraulic tappet, including shell (1), cylinder (2), steel ball (3), ball-and-socket (4) and bar shaped keyway (5), steel ball (3) is assemblied on cylinder ball-and-socket (4) to be aligned at shell bar shaped keyway (5) center and be packed into, it is characterized in that: setting on shell One section of bar shaped keyway sets a ball-and-socket at cylinder outer circle, and a steel ball is placed in ball-and-socket, ensure that cylinder is done in shell Linear motion.

2. a kind of modified double mode hydraulic tappet according to claim 1, it is characterized in that: described shell (1) inner hole Wall is equipped with the bar shaped keyway (5) of 13mm wide 3.5mm depth 0.9mm one section long.

3. a kind of modified double mode hydraulic tappet according to claim 1, it is characterized in that: the ball-and-socket (4), away from From the ball-and-socket (4) for being 0.9mm equipped with a depth at cylinder (2) aperture outer circle 2mm, and a steel ball (3) is placed in ball-and-socket, Cylinder (2) radial rotary in shell (1) hole is placed restrictions on by steel ball (3), so as to avoid between cylinder and shell because mutually Abrasion and resistance caused by radial motion.