CN110617119A

CN110617119A - Phase adjusting device

Info

Publication number: CN110617119A
Application number: CN201910829797.9A
Authority: CN
Inventors: 陈鹏; 邓猛; 胡荣; 蒋长路
Original assignee: Mianyang Fulin Precision Machinery Co Ltd
Current assignee: Mianyang Fulin Precision Machinery Co Ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2019-12-27

Abstract

The invention provides a phase adjusting device which comprises a shell, a supporting shaft (3) and a driving gear (6), wherein the supporting shaft (3) and the shell and the driving gear (6) form a relative rotating structure respectively, the shell comprises a shell cover plate (1) and a shell driving wheel (8), a spinning connecting part (1a) is formed on the shell cover plate (1), a clamping groove is formed in the circumference of the shell driving wheel (8), a fixed connecting structure is formed between the spinning connecting part (1a) and the clamping groove in the circumference of the shell driving wheel (8) through a spinning process, and a hollow cavity structure with an axial space is formed between the shell cover plate (1) and the shell driving wheel (8). The housing of the invention does not need to be locked and assembled by screws, and the radial size of the phase adjusting device can be further reduced, so that the phase adjusting device can be suitable for an engine with smaller space, and the application economy of the phase adjusting device is correspondingly improved.

Description

Phase adjusting device

Technical Field

The present invention relates to the field of phase adjustment, and more particularly to a phase adjustment device for adjusting the phase angle of an engine camshaft relative to a crankshaft.

Background

Although conventional phase adjusting devices, which adjust the phase angle of a camshaft relative to a crankshaft by oil pressure, are already well-established in engines, in actual operation, the conventional phase adjusting devices have slow response speed, poor phase stability, large radial size and large influence of oil temperature on operation.

The existing electric phase adjusting device adopts a single-stage planetary speed reduction principle of a minus mechanism, and has the advantages of high transmission efficiency and the like, but when the electric phase adjusting device is in practical application, after a motor fails, the resistance moment of the motor can enable the phase of an engine camshaft to be adjusted forwards and cannot return to the initial phase position, so that the phenomena of abnormal sound, abnormal shutdown and the like of the engine are caused.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: to solve the problems in the prior art, a phase adjusting device is provided, and the radial size of the phase adjusting device is reduced.

The technical problem to be solved by the invention is realized by adopting the following technical scheme: the utility model provides a phase adjustment device, includes casing, back shaft and driving gear, the casing be cavity structures, the back shaft form relative revolution mechanic with casing, driving gear respectively, the casing include casing apron and casing drive wheel, the casing apron on form spinning connecting portion, set up the joint recess on the circumference of casing drive wheel, spinning connecting portion and casing drive wheel circumference on the joint recess between form fixed connection structure through spinning technology, and form the cavity structures that have axial space between casing apron and casing drive wheel.

Preferably, an eccentric structure is arranged between the supporting shaft and the shell.

Preferably, an inner meshing transmission structure is formed between the driving gear and the driven gear, a fixed connection structure is formed between the driven gear and the camshaft, and the number of teeth of the driving gear is less than that of the driven gear.

Preferably, the eccentricity between the support shaft and the housing is equal to the eccentricity between the driving gear and the driven gear.

Preferably, the driven gear and the camshaft form a detachable fixed connection structure through a connecting bolt.

Preferably, the connecting plate is positioned between the shell cover plate and the driving gear and transmits the rotary motion of the shell to the driving gear through the connecting plate.

Preferably, an outer protruding portion is formed on the connecting plate, an outer limiting groove is formed on the shell driving wheel, and a clamping structure is formed between the outer protruding portion and the outer limiting groove.

Preferably, an inner protruding portion is formed on the connecting plate, an inner limiting groove is formed on the driving gear, and a clamping structure is formed between the inner protruding portion and the inner limiting groove.

Preferably, a relative rotation structure is formed between the support shaft and the housing through a first bearing and between the support shaft and the driving gear through a second bearing.

Preferably, the first bearing is a double-row angular contact ball bearing, or the second bearing is a needle bearing.

Compared with the prior art, the invention has the beneficial effects that: the rotary pressing connecting part is formed on the shell cover plate, the clamping groove is formed in the circumference of the shell driving wheel, and the fixed connecting structure is formed between the rotary pressing connecting part and the clamping groove in the circumference of the shell driving wheel through a rotary pressing process, so that the shell in the phase adjusting device does not need to be locked and assembled by screws, the radial size of the phase adjusting device is further reduced, the phase adjusting device can be suitable for an engine with smaller space, and the application economy of the phase adjusting device is improved.

Drawings

Fig. 1 is an exploded view of a phase adjusting device according to the present invention.

Fig. 2 is a front view of a phase adjusting apparatus according to the present invention.

Fig. 3 is a schematic view (a cross-sectional view taken along a-a in fig. 2) illustrating an operation principle of a phase adjusting apparatus according to the present invention.

Fig. 4 is a schematic view of a spinning process of the housing structure of fig. 1-3.

Fig. 5 is a schematic view of relative sliding between the connecting plate and the housing drive wheel.

Part label name in the figure: 1-shell cover plate, 2-first bearing, 3-support shaft, 4-connecting plate, 5-second bearing, 6-driving gear, 7-driven gear, 8-shell driving wheel, 9-connecting bolt, 10-cam shaft, 11-motor shaft, 12-motor, 1 a-spinning connecting part, 41-outer convex part, 42-inner convex part, 61-inner limiting groove and 81-outer limiting groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, 2 and 3, the phase adjusting device mainly includes a housing, a supporting shaft 3, a connecting plate 4, a driving gear 6, a driven gear 7 and a cam shaft 10, wherein the housing has a hollow cavity structure, and the supporting shaft 3, the connecting plate 4, the driving gear 6 and the driven gear 7 are all located inside the hollow cavity of the housing. Generally, the housing may include a housing cover plate 1 and a housing driving wheel 8, a spinning connection portion 1a is formed on the housing cover plate 1, a clamping groove is formed on the circumference of the housing driving wheel 8, a fixed connection structure is formed between the spinning connection portion 1a and the clamping groove on the circumference of the housing driving wheel 8 through a spinning process under the action of a radial pressure F, and a hollow cavity structure having an axial space is formed between the housing cover plate 1 and the housing driving wheel 8 to limit axial displacement of the driven gear 7 and the connecting plate 4, as shown in fig. 4. The phase adjusting device adopting the structural design does not need to lock the shell by a screw, so that the radial size of the phase adjusting device can be further reduced, the phase adjusting device can be suitable for an engine with smaller space, and the application economy of the phase adjusting device is improved. Wherein, a fixed connection structure is formed between the driven gear 7 and the camshaft 10, and usually, a detachable fixed connection structure is formed between the driven gear 7 and the camshaft 10 through a connecting bolt 9.

The supporting shaft 3 forms a relative rotation structure with the housing and the driving gear 6 respectively, specifically, a relative rotation structure is formed between the supporting shaft 3 and the housing cover plate 1 of the housing through the first bearing 2, and a relative rotation structure is formed between the supporting shaft 3 and the driving gear 6 through the second bearing 5, wherein the first bearing 2 preferably adopts a double-row angular contact ball bearing, and the second bearing 5 preferably adopts a needle bearing. The driven gear 7 is provided with internal teeth and can rotate coaxially relative to the shell; driving gear 6 be provided with the external tooth, and the number of teeth of driving gear 6 is less than driven gear 7's the number of teeth, driving gear 6 and driven gear 7 between form the inner gearing transmission structure, at this moment, driving gear 6 and driven gear 7 between form eccentric structure, with this correspondence, back shaft 3 and casing between also set to eccentric structure, wherein, the eccentricity between back shaft 3 and the casing is preferably equal to the eccentricity between driving gear 6 and the driven gear 7 to guarantee phase adjustment device's operational reliability.

The connecting plate 4 is positioned between the shell and the driving gear 6, and transmits the rotation motion of the shell to the driving gear 6 through the connecting plate 4. Specifically, as shown in fig. 1 and 5, the connecting plate 4 is formed with an outer protrusion 41 and an inner protrusion 42, respectively, the housing driving wheel 8 is formed with an outer limiting groove 81, and a snap-fit structure is formed between the outer protrusion 41 and the outer limiting groove 81, wherein the outer protrusion 41 can slide relative to the outer limiting groove 81, as shown in the Y direction in fig. 5; similarly, an inner limit groove 61 is formed on the driving gear 6, and an engaging structure is formed between the inner protrusion 42 and the inner limit groove 61, wherein the inner protrusion 42 can slide relative to the inner limit groove 61, as shown in the X direction in fig. 5; the driving gear 6 can translate relative to the housing driving wheel 8 in the XY plane without relative rotation.

In practical operation of the phase adjusting device of the present invention, as shown in fig. 3, the supporting shaft 3 is connected to the motor shaft 11, and the motor shaft 11 is driven by the motor 12, so that the supporting shaft 3 is driven by the motor 12 and can rotate relative to the housing, and forms an inner meshing transmission with the driven gear 7 through the driving gear 6 and realizes speed reduction, while the housing rotates synchronously with the engine crankshaft through a chain or a belt, that is, when the housing driving wheel 8 is a sprocket, the housing rotates synchronously with the engine crankshaft through the chain; when the housing driving wheel 8 is a belt pulley, it rotates synchronously with the engine crankshaft through a belt; the supporting shaft 3 and the motor shaft 11 rotate synchronously, and the cam shaft 10 and the driven gear 7 rotate synchronously. Therefore, when the rotating speed of the supporting shaft 3 is different from that of the shell, the phase position of the camshaft 10 relative to the crankshaft can be changed, so that the phase angle of the camshaft 10 relative to the crankshaft can be dynamically adjusted, the opening and closing time of the engine valve can be adjusted, and the fuel efficiency of the engine can be improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a phase adjustment device, includes casing, back shaft (3) and driving gear (6), the casing be cavity structures, back shaft (3) form relative revolution mechanic, its characterized in that with casing, driving gear (6) respectively: the casing include casing apron (1) and casing drive wheel (8), casing apron (1) on form spinning connecting portion (1a), set up the joint recess on the circumference of casing drive wheel (8), spinning connecting portion (1a) and casing drive wheel (8) circumference on the joint recess between form fixed connection structure through spinning technology, and form the cavity structure that has axial space between casing apron (1) and casing drive wheel (8).

2. A phase adjustment device according to claim 1, characterized in that: an eccentric structure is arranged between the supporting shaft (3) and the shell.

3. A phase adjustment device according to claim 1, characterized in that: the driving gear (6) and driven gear (7) between form the inner gearing transmission structure, driven gear (7) and camshaft (10) between form fixed connection structure, the number of teeth of driving gear (6) is less than driven gear (7) the number of teeth.

4. A phase adjustment device according to claim 3, characterized in that: and the eccentricity between the support shaft (3) and the shell is equal to the eccentricity between the driving gear (6) and the driven gear (7).

5. A phase adjustment device according to claim 3, characterized in that: the driven gear (7) and the camshaft (10) form a detachable fixed connection structure through a connecting bolt (9).

6. A phase adjustment device according to any one of claims 1-5, characterized in that: the connecting plate (4) is positioned between the shell cover plate (1) and the driving gear (6) and transmits the rotary motion of the shell to the driving gear (6) through the connecting plate (4).

7. A phase adjustment device according to claim 6, characterized in that: the connecting plate (4) is provided with an outer convex part (41), the shell driving wheel (8) is provided with an outer limiting groove (81), and a clamping structure is formed between the outer convex part (41) and the outer limiting groove (81).

8. A phase adjustment device according to claim 6, characterized in that: an inner protruding part (42) is formed on the connecting plate (4), an inner limiting groove (61) is formed on the driving gear (6), and a clamping structure is formed between the inner protruding part (42) and the inner limiting groove (61).

9. A phase adjustment device according to any one of claims 1-5, characterized in that: and a relative rotation structure is formed between the support shaft (3) and the shell through the first bearing (2), the support shaft (3) and the driving gear (6) through the second bearing (5).

10. A phase adjustment device according to claim 9, characterized in that: the first bearing (2) is a double-row angular contact ball bearing, or the second bearing (5) is a needle bearing.