CN216950591U - Return spring mounting structure of diesel engine electronic throttle valve - Google Patents

Abstract

The utility model discloses a return spring mounting structure of an electronic throttle valve of a diesel engine, which comprises a speed reducing mechanism mounting shell internally provided with a speed reducing mechanism and a throat; a rotating shaft mounting seat opposite to the speed reducing mechanism mounting shell is arranged on the periphery of the throat, a throttle shaft is mounted in the rotating shaft mounting seat, penetrates through the throat, extends into the speed reducing mechanism mounting shell and synchronously rotates with a secondary driven gear in the speed reducing mechanism; a shaft sleeve is formed on the end face of one end, facing the throat, of the secondary driven gear, a torsion spring is sleeved on the shaft sleeve, and a torsion spring limiting plate which extends in the radial direction and is used for axially limiting the torsion spring is arranged at one end, far away from the secondary driven gear, of the shaft sleeve; the support lapping arm of the torsion spring is supported on a shell limiting seat on the speed reducing mechanism mounting shell, and the rotation lapping arm of the torsion spring is supported on a gear supporting seat of the secondary driven gear; when the secondary driven gear rotates, the gear supporting seat drives the rotating lap joint arm to be close to the supporting lap joint arm.

Description

Return spring mounting structure of diesel engine electronic throttle valve

Technical Field

The utility model relates to the technical field of electronic throttles, in particular to a return spring mounting structure of an electronic throttle of a diesel engine.

Background

A return spring in a traditional diesel engine electronic throttle valve is arranged on a speed reducing mechanism through a component shaft sleeve, and the return spring is fixed on the shaft sleeve in order to achieve the reset effect on a throttle valve shaft; when the throttle shaft is reset through elasticity, the fastening structure is fixed through the mutual matching of the shell and the shaft sleeve, and reset tolerance is generated in the limit of the return spring, so that the valve plate rotates to close the throat or the opening angle is not accurate enough; when the throttle valve is assembled, the return spring needs to be fixed on the shaft sleeve, so that the assembling difficulty of the throttle valve is obviously improved in the assembling step, and meanwhile, unnecessary troubles are caused when the throttle valve is assembled by adjusting the rotation precision of the valve plate after the assembling is finished;

therefore, it is urgent to solve the above-mentioned technical problems.

SUMMERY OF THE UTILITY MODEL

According to the technical problem, the utility model provides a return spring mounting structure of an electronic throttle valve of a diesel engine, which mainly aims to eliminate the installation of an independent shaft sleeve in the return spring mounting structure, reduce the reset tolerance and effectively improve the reset precision of a return spring; and the assembly steps are simplified, and the manufacturing cost is reduced.

According to the technical problem to be solved, the following technical scheme is proposed:

the utility model provides a return spring mounting structure of an electronic throttle valve of a diesel engine, which comprises a speed reducing mechanism mounting shell internally provided with a speed reducing mechanism and a throat formed at one side of the speed reducing mechanism mounting shell; a rotating shaft mounting seat opposite to the speed reducing mechanism mounting shell is arranged on the periphery of the throat opening, a throttle shaft is rotatably mounted in the rotating shaft mounting seat, the throttle shaft penetrates through the throat opening and then extends into the speed reducing mechanism mounting shell, and a secondary driven gear in the speed reducing mechanism is synchronously and rotatably sleeved on the throttle shaft;

the end face of one end, facing the throat, of the secondary driven gear is provided with an integrally formed shaft sleeve, a torsion spring is sleeved on the shaft sleeve, one end, far away from the secondary driven gear, of the shaft sleeve is provided with a torsion spring limiting plate extending in the radial direction, and the torsion spring limiting plate and the secondary driven gear are respectively located at two ends of the torsion spring so as to limit the torsion spring in the axial direction; the support lapping arm of the torsion spring is supported on a shell limiting seat on the speed reducing mechanism mounting shell, and the rotation lapping arm of the torsion spring is supported on a gear supporting seat of the secondary driven gear;

by adopting the structure, the torsion spring is clamped and fixed through the secondary driven gear and the torsion spring limiting plate, and the support lapping arm and the rotation lapping arm of the torsion spring are respectively supported on the shell limiting seat and the gear supporting seat; when the secondary driven gear rotates, the rotary lapping arm is driven to swing towards the direction close to the supporting lapping arm through the gear supporting seat.

Furthermore, a gear limiting seat is formed on the secondary driven gear, and the gear limiting seat is positioned on one side of the support lapping arm far away from the rotary lapping arm; when the secondary driven gear elastically returns through the torsion spring, the gear limiting seat is reset and supported on the supporting and overlapping arm;

by adopting the structure, the valve plate is supported on the support overlapping arm through the return of the gear limiting seat, the amplitude of the secondary driven gear is limited when the valve plate returns, the secondary driven gear is effectively prevented from rotating excessively through the elastic return of the torsion spring, and the situation that the valve plate cannot be accurately opened or closed due to the excessive return of the secondary driven gear is avoided.

Furthermore, a shell supporting seat used for limiting the maximum return angle of the rotary lapping arm is arranged on the speed reducing mechanism mounting shell, and the shell supporting seat and the gear supporting seat are arranged in a staggered mode in the radial direction; when the secondary driven gear elastically returns through the torsion spring, the rotary lapping arm is simultaneously supported on the shell supporting seat and the gear supporting seat;

by adopting the structure, the phenomenon that the valve block shakes to effectively open or close the throat opening due to the fact that the valve block shakes when the rotary overlapping arm returns due to the elastic action of the torsion spring is effectively prevented from shaking when the rotary overlapping arm returns, and the rotary overlapping arm acts on the gear supporting seat to conduct the acting force.

Furthermore, the shell supporting seat is a boss structure formed on the speed reducing mechanism mounting shell, and the shell limiting seat is a boss structure with a limiting groove formed on one side of the speed reducing mechanism mounting shell;

by adopting the structure, the rotating lapping wall and the supporting lapping wall of the torsion spring are supported on the corresponding boss structure, and are not easy to damage or misplace after being buckled with the shell of the speed reducing mechanism, and the design is simple and effective.

Furthermore, the gear supporting seat and the gear limiting seat are both boss structures integrally formed on the secondary driven gear;

by adopting the structure, the gear supporting seat of the boss structure can stir the rotary overlapping wall of the torsion spring, and when the secondary driven gear returns, the boss structure can effectively limit the return angle of the secondary driven gear.

Further, the secondary driven gear is a sector gear;

by adopting the structure, the fan-shaped outer teeth of the secondary driven gear are matched with the return amplitude of the torsion spring; the design of the sector gear fully meets the requirement of light weight in the automobile.

Further, a motor installation shell is further formed on the same side, provided with the throat, of the speed reducing mechanism installation shell, and a motor is arranged in the motor installation shell; the speed reducing mechanism also comprises a duplicate gear and a primary driving gear fixed on the output shaft of the motor, and the primary driving gear drives a secondary driven gear to rotate through the duplicate gear;

by adopting the structure, the speed reducing mechanism transmits through the gear, the precision of a transmission command is effectively ensured, and the opening or closing of the throat of the valve block can be accurately controlled through the rotation of the motor.

Furthermore, the duplicate gear comprises a primary driven tooth and a secondary driving tooth which rotate synchronously, the diameter of the primary driven tooth is larger than that of the primary driving tooth, the secondary driven gear is meshed with the primary driven tooth, and the primary driving tooth is meshed with the secondary driving tooth;

adopt above-mentioned structure, the diameter difference through one-level driven tooth and one-level driving gear constitutes reduction gear to rotation through fixing the one-level driving gear on the motor output shaft is more accurate control valve block.

Furthermore, one end of the throttle shaft, which is far away from the secondary driven gear, is installed in the rotating shaft installation seat through a ball bearing;

by adopting the structure, the throttle shaft is smoother and more stable when the throttle shaft is installed in the rotating shaft installation seat and the ball bearing and the secondary driven gear synchronously rotate.

Furthermore, a rear cover covers one side of the speed reducing mechanism mounting shell far away from the throat, and a sealing strip covers a mounting gap between the rear cover and the speed reducing mechanism mounting shell;

adopt above-mentioned structure, seal through the sealing strip, protected erosion sewage and dust in reduction gears, throttle shaft and the motor effectively, prevent throttle sensitivity reduction effectively.

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

technical scheme's return spring mounting structure of diesel engine electronic air throttle above adopting, through second grade driven gear integrated into one piece's axle sleeve, and the fixed torsional spring of centre gripping of torsional spring limiting plate, the inside holistic stability of air throttle has been strengthened, and the spacing seat of casing that sets up on the gear supporting seat that sets up and the reduction gears installation casing on the second grade driven gear, can apply the elastic force of torsional spring to the second grade driven gear on, further cooperate the axle sleeve on the second grade driven gear, make each stirring part of its axial and spacing part axial arrangement, make its air throttle inner structure compacter and firm.

Drawings

FIG. 1 is a schematic perspective view of a throttle valve of a diesel engine according to an embodiment;

FIG. 2 is a schematic view showing an internal structure of a throttle valve of a diesel engine in the embodiment;

FIG. 3 is a schematic structural view of a speed reducing mechanism in the embodiment;

FIG. 4 is a schematic view of an installation structure of a return spring in the embodiment;

FIG. 5 is a schematic view of an installation structure of a two-stage transmission gear and the return spring in FIG. 4.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

Referring to fig. 1 to 5, the utility model provides a return spring mounting structure of an electronic throttle valve of a diesel engine, which mainly comprises a speed reducing mechanism mounting shell 1 with a built-in speed reducing mechanism, a throat 1a and a motor installation shell 1b are formed on the same side of the speed reducing mechanism installation shell 1, a motor 5 is installed in the motor installation shell 1b, the throat 1a is formed with a rotating shaft mounting seat 1c on the outer periphery away from the reduction mechanism mounting case 1, the rotating shaft mounting base 1c is opposed to the reduction mechanism mounting case 1, a throttle shaft 2 is fitted in the throat 1a, the throttle shaft 2 is arranged in a rotating shaft mounting seat 1c through a ball bearing 4, the other end far away from the rotating shaft mounting seat 1c extends into a speed reducing mechanism mounting shell 1 to be matched with a speed reducing mechanism for rotation, and a valve plate 3 for opening or closing a throat is fixedly arranged on the throttle shaft 2;

the speed reducing mechanism mainly comprises a primary driving gear 7, a secondary driven gear 9 and a duplicate gear 8 meshed between the primary driving gear 7 and the secondary driven gear 9, wherein the primary driving gear 7 is fixed on an output shaft of a motor 5, and a throttle shaft 2 fixed in the axis of the secondary driven gear 9 extends to one end of a speed reducing mechanism mounting shell 1; when the output shaft of motor 5 rotated, can drive one-level driving gear 7 and pass through 8 drive second grade driven gear 9 rotations of duplicate gear, this throttle shaft 2 and second grade driven gear 9 synchronous rotations to valve block 3 on the rotation control throttle shaft 2 through the output shaft of motor 5 opened or closed larynx mouth 1 a.

Preferably, the duplicate gear 8 wheel comprises a primary driven tooth and a secondary driving tooth which rotate synchronously, the diameter of the primary driven tooth is larger than that of the primary driving gear 7, the primary driven tooth is meshed with the primary driving gear 7, the secondary driving tooth is meshed with the secondary driven gear 9, the primary driven tooth and the secondary driving tooth rotate synchronously, and then the secondary driving tooth transmits to the secondary driven gear 9, so that a reduction gear is formed by the diameter difference of the primary driven tooth and the primary driving gear 7 on the duplicate gear 8; the diameter of the secondary driving gear is smaller than that of the secondary driven gear 9, the secondary driven gear and the primary driven gear are arranged in a staggered mode and meshed with corresponding gears for matched transmission, and therefore the gears in the speed reducing mechanism are matched more compactly.

Preferably, the secondary driven gear 9 is formed with a shaft sleeve 93 of a cylindrical structure toward the throat 1a, a radially extending torsion spring stopper 931 is provided at an end of the shaft sleeve 93 remote from the secondary driven gear 9, the shaft sleeve 93 is provided with a torsion spring 6, the torsion spring 6 is fixed on the shaft sleeve 93 by the clamping of the torsion spring stopper 931 and the secondary driven gear 9, the torsion spring 6 has a rotary lap arm 61 and a support lap arm 62, and the rotary lap arm 61 and the support lap arm 62 of the torsion spring 6 are supported on a case support base 11 and a case stopper base 12 formed on the reduction mechanism mounting case 1, the rotary lap arm 61 is lapped on the case support base 11, and the support lap arm 62 is fixed in the case stopper base 12, so that the rotation of the torsion spring 6 body following the shaft sleeve 93 is restricted, the rotary lap arm 61 of the torsion spring 6 is supported on a side of the case support base 11 close to the case stopper base 12, the support arm 62 can move towards the direction of the support arm 62 by the applied acting force, and the support arm 62 of the torsion spring 6 is supported and fixed on the shell spacing seat 12; a gear supporting seat 91 and a gear limiting seat 92 are formed on one side of the secondary driven gear 9 facing the torsion spring 6, and the gear supporting seat 91 is rotatably supported on one side of the rotary overlapping arm 61 close to the shell supporting seat 11; when the secondary driven gear 9 rotates, the gear supporting seat 91 can drive the rotary lapping arm 61 to be close to the supporting lapping arm 62; and the gear position-limiting seat 92 is rotatably supported on the side of the support lapping arm 62 far away from the shell supporting seat 91; when the secondary driven gear 9 rotates, the rotary lapping arm 61 of the torsion spring 6 is shifted by the gear supporting seat 91 to rotate towards the supporting lapping arm 62 of the torsion spring 6, and the gear limiting seat 92 rotates towards the direction away from the rotary lapping arm 61 and the supporting lapping arm 62 at the same time, when the output shaft of the motor 5 stops rotating, the driving of the primary driving gear 7 is terminated, so that the secondary driven gear 9 is reset by the elasticity of the torsion spring 6, the rotary lapping arm 61 of the torsion spring 6 resets the gear supporting seat 91 by the elastic reverse acting force, so that the rotary lapping arm 61 of the torsion spring 6 is reset and supported on the housing supporting seat 11, and the gear limiting seat 92 is reset by the elasticity of the torsion spring 6, and finally the gear limiting seat 92 is reset and supported on the supporting lapping arm 62, and is limited by the supporting lapping arm 62 fixed in the housing limiting seat 12, the reset amplitude of the second-stage driven gear 9 through the torsion spring 6 can be limited, so that the second-stage driven gear 9 can be accurately reset to the original position, the phenomenon that the valve plate 3 cannot be accurately opened or the throat 1a is closed due to the fact that the amplitude of the second-stage driven gear 9 is too large when the valve plate is reset because the elastic force of the torsion spring 6 cannot accurately master the reset rebound acting force is effectively prevented.

Preferably, the secondary driven gear 9 is configured as a sector gear, the sector outer teeth of the sector gear are adapted to the return amplitude of the torsion spring 6, the housing support seat 11 is a boss structure integrally formed with the speed reducing mechanism mounting housing 1 and is located on one side of the sector outer teeth on the secondary driven gear 9, and one side of the rotary overlapping arm 61 of the torsion spring 6, which is far away from the support overlapping arm 62, is supported on one side of the housing support seat 11 under the driving of elastic force; the shell limiting seat 12 is a boss structure with a limiting groove formed on one side of the speed reducing mechanism mounting shell 1, and the support overlapping arm 62 of the torsion spring 6 is supported on one side of the shell limiting seat 12 with the limiting groove;

preferably, the gear supporting seat 91 is a boss structure integrally formed on the secondary driven gear 9, the gear supporting seat 91 is supported on one side of the rotary overlapping arm 61 of the torsion spring 6 close to the shell supporting seat 11 and overlaps the rotary overlapping arm 61 with radial dislocation with the shell supporting seat 11, and the gear supporting seat 91 can drive the rotary overlapping arm 61 of the torsion spring 6 to move towards the supporting overlapping arm 62 by the rotation of the secondary driven gear 9; the gear limiting seat 92 is a boss structure integrally formed on the secondary driven gear, the gear limiting seat 92 is supported on one side, far away from the rotary lapping arm 61, of the support lapping arm 62, and is supported on the support lapping arm 62 in a radially staggered manner with the shell limiting seat 12, when the gear supporting seat 91 drives the rotary lapping arm 61 of the torsion spring 6 to move towards the support lapping arm 62, the gear limiting seat 92 rotates towards the direction far away from the rotary lapping arm 61 and the support lapping arm 62 at the same time, and when the secondary transmission gear 9 returns by the elastic acting force of the torsion spring 6, the gear limiting seat 92 is blocked by the support lapping arm 62 arranged in the shell limiting seat 12, so that the amplitude of the secondary transmission gear 9 during returning rotation is controlled; the valve plate 3 on the throttle shaft 2 can accurately open or close the throat 1a by limiting the rotation amplitude and the return amplitude through the fan-shaped structure.

Preferably, a rear cover 13 is covered on the side of the speed reducing mechanism mounting housing 1 away from the throat 1a, and a sealing strip 14 for sealing the speed reducing mechanism mounting housing 1 is covered on a mounting gap between the rear cover 13 and the speed reducing mechanism mounting housing 1, wherein the sealing strip 14 is waterproof and dustproof, and is used for preventing dust and water from invading into the speed reducing mechanism mounting housing 1, which leads to the reduction of sensitivity of the speed reducing mechanism, the throttle shaft 2 and the motor 5 or damages to components.

Reference is made above in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described above with reference to the accompanying drawings are illustrative and intended to explain the present invention and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims (10)

1. A return spring mounting structure of an electronic throttle valve of a diesel engine comprises a speed reducing mechanism mounting shell (1) internally provided with a speed reducing mechanism and a throat (1a) formed on one side of the speed reducing mechanism mounting shell (1); a rotating shaft mounting seat (1c) opposite to the speed reducing mechanism mounting shell (1) is arranged on the periphery of the throat (1a), a throttle shaft (2) is rotatably mounted in the rotating shaft mounting seat (1c), the throttle shaft (2) penetrates through the throat (1a) and then extends into the speed reducing mechanism mounting shell (1), and a secondary driven gear (9) in the speed reducing mechanism is synchronously and rotatably sleeved on the throttle shaft (2); the method is characterized in that:

the end face, facing the throat (1a), of one end of the secondary driven gear (9) is provided with a shaft sleeve (93) in an integrated forming mode, the shaft sleeve (93) is sleeved with a torsion spring (6), one end, far away from the secondary driven gear (9), of the shaft sleeve (93) is provided with a torsion spring limiting plate (931) extending in the radial direction, and the torsion spring limiting plate (931) and the secondary driven gear (9) are located at two ends of the torsion spring (6) respectively so as to limit the torsion spring (6) in the axial direction; and a support overlapping arm (62) of the torsion spring (6) is supported on a shell limiting seat (12) on the speed reducing mechanism mounting shell (1), and a rotation overlapping arm (61) of the torsion spring (6) is supported on a gear supporting seat (91) of the secondary driven gear (9).

2. The return spring mounting structure for an electronic throttle valve of a diesel engine according to claim 1, characterized in that: a gear limiting seat (92) is further formed on the secondary driven gear (9), and the gear limiting seat (92) is located on one side, far away from the rotary lapping arm (61), of the supporting lapping arm (62); when the secondary driven gear (9) returns through the elasticity of the torsion spring (6), the gear limiting seat (92) is reset and supported on the supporting and overlapping arm (62).

3. The return spring mounting structure for an electronic throttle valve of a diesel engine according to claim 2, characterized in that: the reduction mechanism mounting shell (1) is provided with a shell supporting seat (11) used for limiting the maximum return angle of the rotary lapping arm (61), and the shell supporting seat (11) and the gear supporting seat (91) are arranged in a staggered mode in the radial direction; when the secondary driven gear (9) returns through the elasticity of the torsion spring (6), the rotary overlapping arm (61) is simultaneously supported on the shell supporting seat (11) and the gear supporting seat (91).

4. The return spring mounting structure of an electronic throttle valve for a diesel engine according to claim 3, characterized in that: the shell supporting seat (11) is a boss structure formed on the speed reducing mechanism mounting shell (1), and the shell limiting seat (12) is a boss structure with a limiting groove formed in one side of the speed reducing mechanism mounting shell.

5. A return spring mounting structure for an electronic throttle valve of a diesel engine according to claim 3, characterized in that: the gear supporting seat (91) and the gear limiting seat (92) are both boss structures which are integrally formed on the secondary driven gear (9).

6. A return spring mounting structure for an electronic throttle valve of a diesel engine according to claim 3, characterized in that: the secondary driven gear (9) is a sector gear.

7. The return spring mounting structure for an electronic throttle valve of a diesel engine according to claim 1, characterized in that: a motor mounting shell (1b) is also formed on the same side of the speed reducing mechanism mounting shell (1) with the throat (1a), and a motor (5) is arranged in the motor mounting shell (1 b); the speed reducing mechanism further comprises a duplicate gear (8) and a first-stage driving gear (7) fixed on an output shaft of the motor (5), and the first-stage driving gear (7) drives a second-stage driven gear (9) to rotate through the duplicate gear (8).

8. The return spring mounting structure for an electronic throttle valve of a diesel engine according to claim 7, wherein: the dual gear (8) comprises a primary driven tooth and a secondary driving tooth which rotate synchronously, the diameter of the primary driven tooth is larger than that of the primary driving gear (7), the secondary driven gear (9) is meshed with the primary driven tooth, and the primary driving gear (7) is meshed with the secondary driving tooth.

9. The return spring mounting structure for an electronic throttle valve of a diesel engine according to claim 1, characterized in that: one end of the throttle shaft (2) far away from the secondary driven gear (9) is installed in the rotating shaft installation seat (1c) through a ball bearing (4).

10. The return spring mounting structure for an electronic throttle valve of a diesel engine according to claim 1, characterized in that: one side of the speed reducing mechanism mounting shell (1) far away from the throat opening (1a) is covered with a rear cover (13), and a mounting gap between the rear cover (13) and the speed reducing mechanism mounting shell (1) is covered with a sealing strip (14).

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