KR930000206Y1 - Throttle valve return device - Google Patents

Abstract

No content.

Description

[Designation name]

Engine throttle valve return

[Detailed Description of Utility Model]

[Technical Field]

The present invention relates to an intake throttle valve return device of an engine used for a fuel injector or a carburetor.

[Background]

1 is a view showing a conventional intake throttle valve return device described in Japanese Patent Laid-Open No. 59-46345.

1 is an evaporating base body, 2 is a throttle valve, and is fixed to the valve shaft 3.

4 is a support | sticker part fixed to the vaporization base body 1, 5 is a dish-shaped collar press part supported by being fitted to the valve shaft 3, and the annular part 6 is provided.

7, 8 is a cylindrical collar receiving the outer torsion spring (9), 10, 11 is a cylindrical collar receiving both ends of the inner torsion spring (12), 13, 14 is supported by being fitted to the valve shaft (3) and the cylindrical collar (7) ), (10) and between the (8), (11) and the tubular sleeve to prevent contact or interference between the two torsion springs (9) and (12), 15 is fixed to the vaporizing base (1) Torsion spring end stop pin 16 is a throttle valve lever connected to the side end of the valve shaft (3).

The other end of the torsion spring (9) and the other end connected to the tubular sleeve (14) of the torsion spring (12) are locked to the engaging portions (17), (17) formed on the throttle valve lever (16), each end It is similarly latched on the pin 15.

Thus, the two torsion springs 9 and 12 were wound and twisted on the valve shaft 3 such that the elasticity acted in the direction in which the throttle valve 2 was received.

The dish-shaped collar pressing portion 5 is a cutout portion 5a that sandwiches the cutout portion over an angular range α corresponding to the rotational angle of the valve shaft 3, as shown in FIGS. 2 and 3 as plan and side views. ), (5b) are formed, and one end of the inner torsion spring 12 is pulled outward and held by the pin 5 at this cutout.

In addition, the tubular sleeve 13 is also formed with cutouts 13a and 13b which sandwich the cutouts as shown in cross-sectional view in FIG. 4 over the angle range corresponding to the fire angle of the valve shaft 3. At this cutout, one end of the inner torsion spring 12 is drawn outward.

The valve shaft 3 has a cutout stopper 3a formed parallel to the outer circumference as shown in FIG. 4 from the support section 4 to the side end, and has a dish-like color presser 5 and a tubular sleeve 13. ), Engaging holes 5c and 13c held by this cutout stopper 3a are formed.

By the way, in the conventional intake throttle valve return device,

1) In order to take out one end of the inner torsion spring 12, the plate-shaped collar pressing portion 5 and the tubular sleeve 13 are formed with a wide range of cutouts, so that the mechanical strength is reduced and production is cumbersome.

2) The number of parts increases.

3) The valve shaft 3 has a notch engaging portion 3a formed on the side end at the position between the supports 4, and the mechanical strength decreases, and the side diameter must be increased to compensate for this.

4) The other ends of the torsion springs (9) and (12) come out laterally and are bent in the circumferential direction again and the cylindrical collar (11), the cylindrical sleeve (14) and the throttle valve lever are passed through the bent other ends. In (16), the long hole lengthened in the circumferential direction was inherent, and the mechanical strength decreased.

5) In assembling, the tubular sleeve 14 and the throttle valve lever 16 are fitted to the engaging portion 17 at the other ends of the torsion springs 9 and 12 in the torsion state, and the terminal portion of the valve 3 is fitted. The circumferential positioning of both sides for insertion in the cutout part is not easy, and assembly is cumbersome.

6) The other end of the torsion springs (9) and (12) is in direct metal contact with the engaging portion of the cylindrical sleeve (14) and the throttle valve lever (16), and abrasion may occur due to friction caused by the displacement between the two. .

7) The engagement portions of the tubular collar 11, the tubular sleeve 14, and the throttle valve lever 16, which engage the other ends of the torsion springs 9 and 12, are long holes, so the torsion springs 9 and 12 are assembled in the assembly. ) The assembly of the torsional position was not easy.

8) The cylindrical collars 10 and 11 which receive the torsion spring 12 are divided in both sides, and the torsion spring 12 is displaced in the radial direction, and a part of the torsion spring 12 is fed between the two cylinders. There was a problem such as bringing trouble.

In other words, in the conventional example, the plate-shaped collar pressing portion 5 is supported by the valve shaft 3 only by the engagement hole 5c and has an assembly structure that is easily moved by an external force. However, since the pressing force by the torsion springs 9 and 12 is added to the plate-shaped collar pressing section 5 and is a torsion spring, a flat surface which biases the plate-shaped collar pressing section 5 in any specific direction of its radius. It is common to add heart strength.

In addition, since it is installed in the equipment in such a state of assembly, the vibration and the operation are repeated, so that the contact surface between the plate-shaped color pressing part 5 and the valve shaft 3 or the support member 4 is subjected to a very severe friction or collision force. .

Therefore, when the notch part like the conventional example is provided in the plate-shaped collar press part 5, the durability against severe frictional force and the collision force deteriorates, and it was a problem in the goods.

In addition, since the notch engaging portion 3a is formed for the valve shaft 3 to engage with other parts from the support section 4 to the side end, the mechanical strength is lowered.

In the actual apparatus, since several components are installed in the cutout engagement portion of the valve shaft 3 to repeat the vibration and operation, the fatigue strength at the cutout portion or its root portion decreases, which is a quality problem.

[Initiation of draft]

This invention has been invented to solve this problem, and there are fewer components, and there is no need for cutouts of components to pull out one end of the inner torsion coil spring outward, which simplifies manufacturing and decreases the mechanical strength. It aims to eliminate the deterioration of the strength of the valve shaft.

In addition, the torsion coil can facilitate the assembly of the engagement member or the spring holder in engagement with the other end in the axial direction of the spring, and the other end in the axial direction of the torsion coil spring, The purpose is to eliminate friction.

In addition, it is not necessary to bend the terminal of the other end that emerges in the axial direction of the inner torsion coil spring, and furthermore, it is simply and reliably engaged for the purpose of facilitating the assembly of component parts such as engagement members.

Moreover, it aims at reducing the eccentricity of the torsion coil spring by eliminating the outside torsion coil spring from being eaten by the cylindrical collar and positioning it concentrically with the valve shaft on the other end side of the cylindrical sleeve.

The intake throttle valve return device of the engine according to the present invention is a cylindrical portion of a user, and a spring holder having a flange portion at the other end is fitted to the bottom of the valve shaft terminal part, and the engaging member is connected to the terminal portion of the valve shaft. The inner torsion coil spring is installed between the side end of the valve shaft and the spring holder, and the outer torsion coil spring is installed on the outer circumference of the spring holder to suppress the axial misalignment with the flange and to prevent each other end of the two torsion coil springs. The spring holder does not need a cutout, as each end is engaged with the engaging member and each end is engaged with the spring hook portion of the intake cylinder.

The spring holder is fixed to the end of the valve shaft at the bottom, and the cutoff stop of the valve shaft is sufficient to the end.

In addition, a cylindrical sleeve made of abrasion-resistant synthetic resin is fitted to the side end of the valve shaft, and the tubular sleeve is provided with an integral tubular engaging protrusion protruding in the axial direction from the annular part, and each engaging hole of the bottom of the spring holder and the engaging member. The other end of the inner torsion coil spring in the axial direction is engaged with the tubular engaging projection, and the spring holder and the engagement member are easy to assemble and the other end of the torsion coil spring in the axial direction corresponds to the spring holder and the engagement member. Wear can be prevented.

In addition, since the length of the other end of the torsion coil spring is set to the length at which the locking is maintained even when the height of the coil spring is shortened to the minimum by an external force such as vibration, the locking function is reliably maintained.

The inner side of the inner torsion coil spring and the other side in the axial direction are received by the wear resistant cylindrical sleeve, and the other side of the spring is received by the wear resistant annular collar on the outer circumference of the end of the cylindrical sleeve. Since the position in the radial direction is determined by the positioning engagement portion installed on the intake cylinder shaft side, it is possible to eliminate the intake between the sleeves of the inner torsion coil spring, and the eccentricity of the torsion coil spring is reduced, and the tubular sleeve by torsion No damage.

Also, wear-resistant cylindrical sleeve is fitted on the outer circumference of the flanged spring holder fixed to the end of the valve shaft.The outer sleeve is fitted with the outer torsion coil spring, and the annular collar is fitted on the outer circumference of the end of the cylindrical sleeve. The outer torsion coil spring is determined as it is received in the axial direction from the flange of the spring holder and is positioned on the outer circumference of the flange to engage the outer diameter portion of the annular collar with the positioning projection projecting inward in the axial direction. Of the torsion coil spring can be eliminated and the eccentricity of the torsion coil spring can be reduced, and the breakage of the tubular sleeve due to the torsion is eliminated.

[Brief Description of Drawings]

1 is a longitudinal sectional view of a conventional intake throttle valve return device.

2 and 3 are a plan view and a side view of the color pressing portion of FIG.

4 is a cross-sectional view taken along the line IV-IV of FIG.

5 is a longitudinal sectional view of the first embodiment of the intake throttle valve return device of an engine according to the present invention;

6 is a front elevational view of the main part of the spring holder, the engaging member and the throttle valve lever of FIG.

7 is a longitudinal sectional view of a second embodiment according to the present invention.

8 is a perspective view of a cylindrical sleeve in the second embodiment.

9 is a front view in which a part of the engaging portion of the inner torsion coil spring wound on the cylindrical sleeve is cut.

10 is a longitudinal sectional view of a third embodiment of the present invention.

11 is a longitudinal sectional view of the fourth embodiment according to the present invention.

12 is a front view of main parts of the spring holder, the engaging member and the throttle valve lever of FIG.

[Best Mode to Set Up a Design]

The embodiment of the intake throttle valve return apparatus of the engine of this invention is demonstrated by drawing.

5 is a longitudinal sectional view showing the first embodiment of the intake throttle valve return device of the engine according to the present invention.

In Fig. 5, 21 is an intake cylinder, which is intaken in the direction of the arrow.

22 is a valve shaft which penetrates the intake cylinder 1 and is rotatably supported by a pair of bearings 23, and the side end part 22a is shown outward.

24 is a throttle valve attached to the valve shaft 22, 25 and 26 are press plates for pressing the bearing 23, 27 is a seal member, 28 is a spring hanger which is integrally installed or fixed to the intake cylinder 31. It is wealth.

29 and 30 are cylindrical collars fitted to the shaft ends 22a of the valve shaft 22, and are made of wear-resistant synthetic resin.

31 is an inner torsion coil spring received by the tubular collars 29 and 30, one end of which is held by the spring hook portion 28.

32 is a spring holder which becomes the cylindrical part 32a, the bottom part 32b of one end, the flange part 32c of the other end, etc., and is clamped by the terminal part of the valve shaft 22 in the bottom part 32b.

33 is a disc-shaped engagement member, which is provided with a spring hook portion 33a constituting an engagement portion on an outer circumference thereof and is fitted to the terminal portion of the valve shaft 22.

34 and 35 are cylindrical collars fitted in the spring holder 32, and are made of wear-resistant synthetic resin.

36 is an outer torsion coil spring received by the tubular collars 34 and 35, one end of which is held by the spring hanger portion 28, and the other end of which is held by the spring hanger portion 33a.

37 is a throttle valve lever fitted to the terminal portion of the valve 22, which is fixed together with the spring holder 32 and the engagement member 33 by a nut 39 through a spring washer 38, and a pedal pedal. A conduction wire (all not shown) from the accelerator pedal is connected to open and close the throttle valve 24.

As shown in FIG. 6, engagement holes 32a, 33b, and 37a pass through the spring holder 33, the engagement member 33, and the throttle valve lever 37, and the inner torsion coil spring 31 The other end of) is locked.

In addition, retaining holes 32e, 33c, and 37b are installed in the spring holder 32, the engaging member 33, and the throttle valve lever 37, and fitted into the terminal portion of the valve shaft 22, and the cutout system It is locked by the branch part 22b, and rotates integrally with the valve shaft 22. As shown in FIG.

The inner and outer torsional coil springs 21 and 36 were assembled by twisting such that the elasticity acts in the direction to step on the throttle valve 24.

One end of the inner torsion coil spring 31 is drawn out through the empty space between the spring holder 32 and the intake cylinder 21 side, and can be easily hung on the spring hanger unit 28 without any parts in the way, thereby assembling and combining each component. I can do it very simply.

7 is a longitudinal sectional view showing a second embodiment according to the present invention.

In FIG. 7 in which the same reference numerals are attached to the same parts as those in FIG. 5, 40 is a cylindrical sleeve with a collar fitted to the side end portion 22a of the valve shaft 22, which is a wear-resistant synthetic resin.

As shown in Fig. 8, the tubular sleeve 40 has the tubular engaging protrusion 40a integrally axially protruded from the collar portion.

41 is an annular collar made of a wear-resistant synthetic resin, which is fitted to the outer circumference of the end of the cylindrical sleeve 40 and supported by the pressing plate 23.

42 is a cylindrical sleeve fitted to the spring holder 32, and is a wear-resistant synthetic resin.

43 is an annular collar made of wear-resistant synthetic resin, which is fitted to the outer circumference of the end of the cylindrical sleeve 42 and supported by the flange portion 32c of the spring holder 32.

36 is an outer torsion coil spring supported by the tubular sleeve 34 and the annular collar 43, one end of which is held by the spring collar portion 28, and the other end of which is latched by the spring hook portion 33a.

The inner torsion coil spring 31 is fitted to the tubular sleeve 40 and is received from the inner diameter side over the entire length, and at the same time, both ends of the lateral direction are received by the collar and the annular collar 41 of the tubular sleeve 40 and one end of the spring hanger. The other end held by the part 28 and axially engaged is engaged in the tubular engaging projection 40a of the cylindrical sleeve 40.

The outer torsion coil spring 36 is fitted to the cylindrical sleeve 42 with a collar, and is received from the inner diameter side over the entire length, and both ends of the lateral direction are received from the collar and the annular collar 43 of the normal sleeve 42. It is locked, and one end is locked to the spring hanger part 28, and the other end is locked to the spring hanger part 33a. Engagement holes 32d, 33b and 37a pass through the spring holder 32, the engagement member 33 and the throttle valve lever 37, and the tubular engagement protrusion 40a of the sleeve 40 is fitted. It is lost.

In addition, the spring holder 32, the engaging member 33 and the throttle valve lever 37 is latched to the cutout stop portion 22b by the locking holes 32e, 33c, and 37b as described above. It is rotated integrally with the shaft 22.

The spring holder 32 and the engaging member 33 are engaged with the tubular engaging projection 40a at the engaging holes 32d and 33b so that their circumferential positions are aligned to allow the inner and outer torsion coil springs 31 to rest; (36) is twisted by a required angle, and is fitted to the cutout engaging portion (22b) of the terminal portion of the valve shaft (24) to be assembled.

The inner and outer torsion coil springs 31 and 36 are assembled by twisting such that the elasticity acts in the closing direction of the throttle valve 24.

In addition, the other end of the inner torsion coil spring 31, which is straight in the axial direction, has the other end in advance so that the other end is retained in the tubular engaging protrusion 29 even if the height is shortened to the minimum by external force such as vibration as shown in FIG. The length of is set so that the engagement performance can be reliably maintained.

10 is a longitudinal sectional view showing a third embodiment according to the present invention.

In FIG. 10 with the same reference numeral as in FIG. 7, the outer plate of the annular collar 41 is fitted in the pressing plate 25 so as to be positioned concentrically with the radial positioning, that is, the valve shaft 22. The crystal engagement section 25a is set.

The positioning engagement portion is provided in the intake cylinder 21 when receiving the annular collar 41 directly from the intake cylinder 21.

11 is a sectional view showing a fourth embodiment according to the present invention.

In FIG. 11, the same reference numerals as in FIG. 7 denote the flange portions 32c of the spring holder 32, and a plurality of positioning projections 32f are shown in FIG. It is installed as one. The positioning projection 32f is fitted to the outer periphery of the end of the sleeve 42, and the annular collar 43 received by the flange portion 32c of the spring holder 32 engages to form a radial positioning.

For this reason, the cylindrical sleeve 42 is positioned concentrically with the valve shaft 22.

In the above embodiment, the positioning projections 32f of the flange portion 32c of the spring holder 32 are provided at three equal intervals, but they may be provided at more than one location or may be provided in an annular shape.

As described above, the engine intake throttle valve return device according to the present invention has cylindrical collars 20 and 30 guided by the inner torsional coil springs 31 inserted into the uncut portions of the valve shaft 22. As a result, the guide parts are very stable compared to the prior art. Moreover, the cylindrical collar 35 which is the guide of the outer torsion coil spring 36 is supported by the spring holder 35 with the cylindrical collar 29 which is the guide of the inner torsion coil spring 31, and this spring holder 32 An engagement hole for locking the inner torsion coil spring is installed so that there is no cutout as in the conventional example.

In addition, it supports the cylindrical collar 34 and the spring holder 32, and is provided with a disc-shaped engagement member 33 with a spring hook portion of the outer torsion spring 36, but also retains the outer torsion spring without cutting off parts have.

Therefore, the stability of the vibration or operation is improved, as well as the effect of minimizing the portion that lowers the mechanical strength.

Claims (10)

A valve shaft 22 having a throttle valve 24 disposed in the intake cylinder 21 of the engine and the intake cylinder penetrated in a linear direction and fixed to the throttle valve so that at least one side thereof protrudes outward as a side end portion 22a. )and; The inner torsion coil spring 31 and the outer torsion coil spring 36, which are installed concentrically on the valve shaft end and each end of which is held by the spring hook portion 28 of the intake cylinder, are formed between the two torsion coil springs. A cylindrical portion 32a positioned, a bottom portion 32b at one end of the cylindrical portion, and a flange portion 32c provided on the outer circumference of the other end of the cylindrical portion opposite to the bottom portion, and formed between the flange portion and the intake cylinder. Spring holders 32 which are latched and fixed to the end of the valve shaft 22 at the bottom with a gap through which one end of the inner torsion coil spring passes, and prevent the valve from exiting in the axial direction of the outer torsion coil spring from the flange portion. )Wow; The other end of the engagement hole 33b and the outer torsion coil spring, which are overlapped with the bottom of the spring holder and locked to the terminal portion of the valve shaft, are fixed to the valve shaft 22 and engage the other end of the inner torsion coil spring. An intake throttle valve return device for an engine having a catching member (33) having spring hanger portions (33a) engaged thereon. 2. The engine intake throttle valve return device according to claim 1, wherein the engaging member (33) has a disc shape and a spring hook (33a) is provided on an outer circumference thereof. The inner torsion coil spring (31) is received from the cylindrical collars (29) and (30) fitted to the shaft end of the valve shaft (22), and the outer torsion coil spring (36) is connected to the spring holder. An intake throttle valve return device for an engine, characterized in that it is received by a cylindrical collar (34) or (35) fitted. 4. The engine intake throttle valve return device according to claim 3, wherein the cylindrical collars (29), (30), (34), and (35) are made of wear-resistant synthetic resin. The tubular engagement protrusion 40a protruding axially from the collar portion is integrally provided and has a cylindrical sleeve 40 with a collar fitted to the shaft end portion 22a of the valve shaft 22. The tubular engaging protrusion (40a) is the other end of the inner torsion coil spring 31 is engaged by passing through the engine characterized in that it is engaged in the respective engagement holes of the spring holder 32 and the engaging member (33). Intake throttle valve return device. 6. The engine intake throttle valve return device according to claim 5, wherein the collar-shaped sleeve (40) is made of a wear-resistant synthetic resin. The method of claim 5, wherein the length of the other end of the inner torsion coil spring (31) passed into the tubular engaging protrusion (40a) is engaged in the tubular engaging projection even if the spring is shortened to the minimum height by an external force. Intake throttle valve return device of the engine, characterized in that. The outer diameter portion is fitted in the outer circumference of the cylindrical sleeve 40 with the collar and received in the axial direction from the intake cylinder 21 side, and the outer diameter portion is engaged with the positioning engagement portion 25a on the intake cylinder side diameter. An intake throttle valve return device for an engine, characterized by having an annular collar (41) having a determined position in the direction. The intake throttle valve return device according to claim 8, wherein the annular collar (41) is made of a wear-resistant synthetic resin. 2. The outer circumference of the cylindrical sleeve 42 with a collar fitted to the outer circumference of the spring holder is provided with a positioning projection 32f protruding in the axial direction in the flange 32c of the spring holder 32. An outer torsion coil spring 36 fitted to the outer diameter portion and having an annular collar 83 engaged with the positioning projection portion 32f to determine its position in the radial direction, and fitted into the collar-shaped sleeve 42. The intake throttle valve return device of the engine, characterized in that both sides of the axial direction are received by the collar and the annular collar (43) of the cylindrical sleeve with a collar (42).