CN214660408U

CN214660408U - Valve clearance adjusting device

Info

Publication number: CN214660408U
Application number: CN202120582345.8U
Authority: CN
Inventors: 梁震威; 姚展鹏; 秦浩; 吴自标; 陈辉; 黄恒; 张峰; 杜海珍; 张剑辉
Original assignee: GAC Honda Automobile Co Ltd
Current assignee: GAC Honda Automobile Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-11-09
Anticipated expiration: 2031-03-22

Abstract

The utility model discloses a valve clearance adjusting device, include: a body; the screwdriver component is arranged on the machine body through a bearing component; the angle limiting assembly comprises a one-way bearing and an angle limiting block, the one-way bearing is installed on the machine body, an inner ring of the one-way bearing is in clearance fit with the screwdriver part, a stop block is arranged on the inner ring of the one-way bearing, the angle limiting block is fixedly connected with the screwdriver part, the angle limiting block is provided with a first limiting part and a second limiting part along the circumferential direction, an anti-loosening included angle is defined between the first limiting part and the second limiting part, and the stop block is positioned in the anti-loosening included angle so as to be respectively abutted against the first limiting part and the second limiting part when the screwdriver part rotates in different directions; and the nut locking sleeve is sleeved outside the screwdriver part. The valve clearance precision is controlled through the anti-loose included angle of the angle limiting block, the requirement on the precision of a power source for driving a screwdriver part is not high, the cost is lower, long-time operation is not needed, the operation is simple, the working hours are short, and the valve clearance consistency is high.

Description

Valve clearance adjusting device

Technical Field

The utility model is used for the engine field especially relates to a valve clearance adjusting device.

Background

At present, the valve clearance adjusting modes mainly comprise the following modes: manual adjustment: manually adjusting the valve clearance by means of a tool clamp and a clearance measuring tool; adjusting an external screwing tool: the tool clamp is driven by electric power or a tightening tool, manually placed on a workpiece, and started with a power source to finish adjustment; automatic regulating apparatus: the workpiece enters the equipment, and the whole adjusting process is automatically completed by the equipment.

The above regulation mode has the following disadvantages: manual adjustment: the working hours are long, the consistency is poor, and the personnel can learn for a long time; the existing related patents are focused on a valve adjusting clamp and an auxiliary crankshaft rotating tool, so that the operation convenience is improved; the valve clearance accuracy is affected by wear of the clearance measurement tool; adjusting an external screwing tool: in the existing related patents, the locking nut and the adjusting stud adopt different power sources or the same power source, and a special mechanism or action is arranged to realize power output switching; controlling the rotation angle by using a servo motor so as to control the gap; the tightening power sources are special wrenches, the valve clearance is controlled by a servo motor, and the cost is high; the whole mechanism is complex; only 1 valve can be adjusted each time, and the efficiency is insufficient; automatic regulating equipment: the mechanism comprises a workpiece positioning mechanism, a crankshaft rotating mechanism, a valve adjusting mechanism and the like, and is high in cost, complex in structure and poor in compatibility.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a valve clearance adjusting device.

The utility model provides a technical scheme that its technical problem adopted is:

a valve lash adjustment device comprising:

a body;

a screwdriver component mounted on the machine body through a bearing component;

the angle limiting assembly comprises a one-way bearing and an angle limiting block, the one-way bearing is installed on the machine body, an inner ring of the one-way bearing is in clearance fit with the screwdriver part, a stop block is arranged on the inner ring of the one-way bearing, the angle limiting block is fixedly connected with the screwdriver part, the angle limiting block is provided with a first limiting part and a second limiting part along the circumferential direction, an anti-loosening included angle is defined between the first limiting part and the second limiting part, and the stop block is located in the anti-loosening included angle so as to be respectively abutted against the first limiting part and the second limiting part when the screwdriver part rotates in different directions;

and the nut locking sleeve is sleeved outside the screwdriver part.

In some embodiments, further comprising:

and the driving assembly comprises a driving shaft, and the driving shaft realizes power transmission with the screwdriver part through a friction plate.

In some embodiments, the machine body is provided with an adjusting bolt, the adjusting bolt is provided with a hollow inner hole, the driving shaft penetrates through the inner hole, a friction plate matched with the screwdriver part is arranged at the end part of the driving shaft, and the adjusting bolt is provided with an elastic part applying axial force to the driving shaft and an adjusting nut adjusting pretightening force of the elastic part.

In some embodiments, the drive shaft circumscribes the first power source.

In some embodiments, the angle limiting blocks include a first angle limiting block and a second angle limiting block, the first angle limiting block and the second angle limiting block are axially arranged on two sides of the one-way bearing, and an inner ring of the one-way bearing is provided with a first stop block matched with the first angle limiting block and a second stop block matched with the second angle limiting block.

In some embodiments, the bearing assembly includes a radial bearing and a thrust bearing.

In some embodiments, the one-way bearing and the radial bearing are both mounted to the housing by a bearing mount.

In some embodiments, a second power source is included to drive the nut locking sleeve.

In some embodiments, the nut locking sleeve is provided with a driven gear, and the output end of the second power source is provided with a driving gear in transmission fit with the driven gear.

One of the above technical solutions has at least one of the following advantages or beneficial effects: when adjusting the valve clearance, screw valve clearance double-screw bolt through screwdriver part, during it, screwdriver part and angle stopper tight fit to make the angle stopper drive one-way bearing dog and allow the direction rotation along one-way bearing, the first spacing portion and the dog laminating of angle stopper. And reversely rotating the screwdriver part to reversely loosen the valve clearance stud, wherein when the angle limiting block rotates to the second limiting part at the other end and is attached to the stop block, the screwdriver part stops rotating together with the angle limiting block under the action of the one-way bearing, and the valve clearance stud is finally adjusted to a proper position due to the fact that the angle of a reverse loosening included angle corresponds to the thread pitch of the valve clearance stud. And finally, screwing the nut through the nut locking sleeve to lock the valve clearance stud. According to the technical scheme, the valve clearance precision is controlled through the anti-loosening included angle of the angle limiting block, the requirement on the precision of a power source for driving a screwdriver part is not high, the cost is lower, long-time operation is not needed, the operation is simple, the working hours are short, the consistency of the valve clearance is high, and the qualification rate is high.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a top view of the structure of one embodiment shown in FIG. 1;

FIG. 3 is a schematic view of the internal structure of the angle limiting assembly of FIG. 1 according to one embodiment.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for convenience of description of the technical solution of the present invention, and it is not intended to indicate or imply that the technical features indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the utility model, the meaning of a plurality of is one or more, the meaning of a plurality of is more than two, and the meaning of more than two is understood as not including the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is any description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the present invention, unless otherwise explicitly defined, the terms "set", "install", "connect", and the like are to be understood in a broad sense, and for example, may be directly connected or may be indirectly connected through an intermediate medium; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a valve clearance adjusting device, which includes a machine body 1, a screwdriver component 2, an angle limiting component 3 and a nut locking sleeve 4.

The screwdriver component 2 is used for screwing or unscrewing the valve clearance stud, the screwdriver component 2 comprises a rod part and a head part, the rod part of the screwdriver component 2 is installed on the machine body 1 through a bearing component, and the head part of the screwdriver component 2 is arranged into a straight line, a cross, an inner hexagon or an outer hexagon according to the shape of the valve clearance stud.

Referring to fig. 1 and 3, the angle limiting component 3 includes a one-way bearing 31 and an angle limiting block 32, the one-way bearing 31 is installed on the machine body 1, an inner ring of the one-way bearing 31 is in clearance fit with the screwdriver component 2, the inner ring of the one-way bearing 31 can independently rotate with the screwdriver component 2, a stopper 33 is arranged on the inner ring of the one-way bearing 31, the angle limiting block 32 is fixedly connected with the screwdriver component 2, the angle limiting block 32 is provided with a first limiting portion 34 and a second limiting portion 35 along the circumferential direction, an anti-loosening included angle is defined between the first limiting portion 34 and the second limiting portion 35 along the circumferential direction of the screwdriver component 2, and the stopper 33 is located in the anti-loosening included angle so as to be respectively abutted against the first limiting portion 34 and the second limiting portion 35 when the screwdriver component 2 rotates along different directions. The nut locking sleeve 4 is sleeved outside the screwdriver part 2. The anti-loosening included angle is set according to the thread pitch of the valve clearance stud, so that the valve clearance stud is just adjusted to a proper valve clearance position after the screwdriver part 2 drives the valve clearance stud to rotate through the anti-loosening included angle.

Referring to fig. 1, 2 and 3, when the valve clearance is adjusted, the screwdriver part 2 is screwed tightly on the valve clearance stud under the action of external force, and during the adjustment, the screwdriver part 2 is tightly matched with the angle limiting block 32, so that the angle limiting block 32 drives the one-way bearing 31 stop 33 to rotate along the allowed direction of the one-way bearing 31, and the first limiting part 34 of the angle limiting block 32 is attached to the stop 33. The screwdriver part 2 is rotated reversely to loosen the valve clearance stud reversely, and meanwhile, when the angle limiting block 32 rotates to the point that the second limiting part 35 at the other end is attached to the stop block 33, the screwdriver part 2 stops rotating together with the angle limiting block under the action of the one-way bearing 31, and the valve clearance stud is finally adjusted to a proper position due to the fact that the angle of the reverse loosening included angle corresponds to the thread pitch of the valve clearance stud. And finally, the nut is screwed through the nut locking sleeve 4 to lock the valve clearance stud. This technical scheme controls valve clearance precision through the anti-pine contained angle of angle stopper 32, and is not high to the power supply precision requirement of drive screwdriver part 2, and the cost is lower, need not long-time operation moreover and learns well, easy operation man-hour weak point, and valve clearance uniformity is high, and the qualification rate is high, need not clearance measuring tool.

In some embodiments, referring to fig. 1, 2 and 3, the valve lash adjustment device further comprises a drive assembly including a drive shaft 5, the drive shaft 5 being in power communication with the screwdriver element 2 via a friction plate 51. When the driver member 2 is screwed into the valve clearance stud, the driving force of the driving shaft 5 exceeds the upper limit of the frictional force of the friction plate 51 between the driving shaft 5 and the driver member 2, and then the friction plate 51 slips and the driver member 2 stops being screwed. When the valve clearance stud is loosened reversely and the angle limiting block 32 rotates to the point that the second limiting part 35 at the other end is attached to the stop block 33, the angle limiting block and the screwdriver part 2 stop rotating together under the action of the one-way bearing 31, the friction plate 51 slips, and at the moment, the included angle rotated by the screwdriver part 2 is the loosening angle. The friction plate 51 realizes power transmission between the driving shaft 5 and the driver bit 2, so that the driving force of the driving shaft 5 can be transmitted to the driver bit 2 more accurately, and the valve clearance stud and the one-way bearing 31 are prevented from being damaged.

Further, referring to fig. 1, 2 and 3, the machine body 1 is provided with an adjusting bolt 52, the adjusting bolt 52 is provided with a hollow inner hole, the driving shaft 5 passes through the inner hole, the end of the driving shaft 5 is provided with a friction plate 51 engaged with the screwdriver part 2, the adjusting bolt 52 is provided with an elastic part 53 for applying an axial force to the driving shaft 5 and an adjusting nut 54 for adjusting the pretightening force of the elastic part 53, wherein the elastic part 53 may be a spring, a leaf spring or the like. By adjusting the position of the nut 54 on the adjusting bolt 52, the preload of the elastic member 53 can be adjusted to change the maximum static friction force between the friction plates 51.

The drive shaft 5 may be driven manually or electrically, for example, in some embodiments as shown in fig. 1, the drive shaft 5 is externally connected to a first power source 55, and the first power source 55 may be selected from a common motor, a servo motor or an electric tightening tool. First power supply 55 can directly integrate in valve clearance adjusting device, need not external other instruments, and the volume is smaller and more exquisite, and weight is lighter, can realize a plurality of valves and adjust simultaneously through permutation and combination.

The angle limiting blocks 32 may be one or two, in some embodiments, referring to fig. 3, the angle limiting blocks 32 include a first angle limiting block 321 and a second angle limiting block 322, the first angle limiting block 321 and the second angle limiting block 322 are axially disposed on two sides of the one-way bearing 31, and an inner ring of the one-way bearing 31 is provided with a first stopper engaged with the first angle limiting block 321 and a second stopper engaged with the second angle limiting block 322. The first angle limiting block 321 and the second angle limiting block 322 which are symmetrically arranged can provide acting force from two-side balance for the one-way bearing 31, the rotating angle precision of the screwdriver part 2 is ensured, and the service life of the one-way bearing 31 is prolonged.

Wherein the bearing assembly comprises a radial bearing 61 and a thrust bearing 62 to provide radial and axial support for the screwdriver element 2.

Further, referring to fig. 1, the one-way bearing 31 and the radial bearing 61 are mounted to the housing 1 through a bearing housing.

The nut locking sleeve 4 may be manually or electrically driven, for example, in some embodiments shown in fig. 1, the valve lash adjusting device further includes a second power source 41 for driving the nut locking sleeve 4, and the second power source 41 may be selected from a common motor, a servo motor or an electric tightening tool. The second power source 41 may be directly or indirectly connected to the nut locking sleeve 4 to achieve power transmission, for example, in some embodiments shown in fig. 1, the nut locking sleeve 4 is provided with a driven gear 42, and the output end of the second power source 41 is provided with a driving gear 43 in driving engagement with the driven gear 42. The driven gear 42 and the driving gear 43 can adopt straight gears or helical gears, the driven gear 42 and the driving gear 43 are directly meshed or indirectly in transmission connection, and the second power source 41 is deviated from the axis of the screwdriver component 2 to avoid interference with the first power source 55 while power transmission is realized.

In the description herein, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims

1. A valve lash adjustment device, characterized by comprising:

a body;

and the nut locking sleeve is sleeved outside the screwdriver part.

2. The valve lash adjustment device according to claim 1, characterized by further comprising:

3. The valve lash adjustment device according to claim 2, characterized in that the body is provided with an adjustment bolt, the adjustment bolt is provided with a hollow inner hole, the drive shaft passes through the inner hole, a friction plate that engages with the screwdriver part is provided at an end portion of the drive shaft, and the adjustment bolt is provided with an elastic member that applies an axial force to the drive shaft and an adjustment nut that adjusts a preload of the elastic member.

4. A valve lash adjustment device according to claim 2 or 3, characterised in that the drive shaft circumscribes the first power source.

5. The valve lash adjusting device according to claim 1, characterized in that the angle stopper includes a first angle stopper and a second angle stopper, the first angle stopper and the second angle stopper are axially provided on both sides of the one-way bearing, and an inner ring of the one-way bearing is provided with a first stopper cooperating with the first angle stopper and a second stopper cooperating with the second angle stopper.

6. The valve lash adjustment device of claim 1, wherein the bearing assembly comprises a radial bearing and a thrust bearing.

7. A valve play adjustment device as claimed in claim 6, characterized in that the one-way bearing and the radial bearing are both mounted to the body by means of a bearing block.

8. The valve lash adjustment device of claim 1 further comprising a second power source driving the nut locking sleeve.

9. A valve lash adjustment device according to claim 8, characterized in that the nut locking sleeve is provided with a driven gear and the output of the second power source is provided with a driving gear in driving engagement with the driven gear.