Chain sprocket fixing tool for engine timing correction

Abstract

The application relates to the technical field of engine timing tools, in particular to a chain wheel fixing tool for engine timing correction, which comprises two disc bodies, a base, a nut and a limiting piece. Each disc body is provided with an insertion column and a threaded column on each side for being inserted into a first insertion hole. The base is provided with arc-shaped grooves, each of which is provided with a threaded column, and the end of the threaded column away from the disc body extends out of the groove mouth of the arc-shaped groove by a predetermined distance. The nut is threadedly connected with the threaded column and abuts against or separates from the surface of the base on both sides of the groove mouth of the arc-shaped groove. The limiting piece is arranged on the side of the disc body away from the base and selectively limits the circumferential rotation of the disc body. The disc body and the chain wheel are synchronously rotated through the insertion column, the base is pressed through the screwing of the nut, the circumferential rotation of the disc body is limited, the circumferential rotation of the chain wheel is limited, the easy-wearing parts can be replaced, and the chain wheel is convenient to replace.

Description

Technical Field

[0001] This application relates to the field of engine timing tools, and more specifically to a sprocket fixing tool for engine timing adjustment. Background Technology

[0002] The timing system of an engine is a system that ensures that each component of the engine performs the appropriate action at the appropriate time.

[0003] Patent document (CN115263637A) discloses an engine timing system, including a crankshaft, a camshaft, and a belt drive or chain drive that connects the crankshaft and the camshaft. The sprocket fixing tool is a special tool used to fix the sprocket on one end of the camshaft to facilitate chain removal when the engine timing system needs to be adjusted or repaired. Currently, if the sprocket is not fixed when removing the chain, the sprocket will rotate circumferentially, causing the camshaft to rotate circumferentially, thus affecting the chain removal.

[0004] Therefore, there is a need for a sprocket fixing tool for engine timing alignment that can restrict the sprocket's circumferential rotation, has easily replaceable and removable wear parts. Summary of the Invention

[0005] The main objective of this application is to provide a sprocket fixing tool for engine timing adjustment, used to fix a sprocket on a vehicle body. The sprocket has a first insertion hole. The sprocket fixing tool includes two discs, a base, a nut, and a limiting member. Each disc has a pin and a threaded pin on each side for insertion into the first insertion hole. The base has an arc-shaped groove, and a threaded pin is inserted into each arc-shaped groove, with the end of the threaded pin extending a predetermined distance from the opening of the arc-shaped groove. The nut is threadedly connected to the threaded pin and abuts against or separates from the surface of the base on both sides of the opening of the arc-shaped groove. The limiting member is located on the side of the disc facing away from the base and selectively restricts the circumferential rotation of the disc. The pin allows the disc to rotate synchronously with the sprocket. The nut is tightened and presses against the base, restricting the circumferential rotation of the disc. This achieves the advantages of restricting the circumferential rotation of the sprocket and allowing for the replacement of easily worn parts.

[0006] Another objective of this application is to provide a sprocket fixing tool for engine timing calibration, wherein the disc body has chain teeth, the limiting member is two rotating rods, the two rotating rods are rotatably mounted on the side of the disc body away from the base, the disc body has a screw hole, and a bolt is threaded into the screw hole, thereby selectively restricting the rotation of the disc body through the limiting member.

[0007] To achieve at least one of the above-mentioned objectives, this application provides a sprocket fixing tool for engine timing adjustment, used to fix a sprocket on a vehicle body, the sprocket having a first insertion hole, wherein the engine timing adjustment sprocket fixing tool includes: Two discs, each disc having a post and a threaded post on each side for insertion into the first socket; The base has an arc-shaped groove, and a threaded post is inserted into each arc-shaped groove, with the end of the threaded post facing away from the disk extending out of the opening of the arc-shaped groove by a predetermined distance. A nut, which is threadedly connected to the threaded post and abuts against or separates from the surface of the base on both sides of the arc-shaped groove opening; A limiting member is provided on the side of the disc body opposite to the base and selectively restricts the disc body from rotating circumferentially.

[0008] In one or more embodiments of this application, the disc body has chain teeth, the limiting member is two rotating rods, the two rotating rods are rotatably installed on the side of the disc body away from the base, the disc body has a screw hole, and a bolt is threaded into the screw hole.

[0009] In one or more embodiments of this application, the base includes a waist portion and two mounting portions, the waist portion being located between the two mounting portions, each mounting portion having a disc body, each mounting portion having two arc-shaped grooves and a central hole, the two arc-shaped grooves being arranged symmetrically, and the central hole being located between the two arc-shaped grooves.

[0010] In one or more embodiments of this application, the insertion post is detachably connected to the disk body.

[0011] In one or more embodiments of this application, the disc body has a second insertion hole, the insertion post is threadedly connected to the second insertion hole, and the end of the insertion post near the base is flush with the end face of the disc body near the base.

[0012] In one or more embodiments of this application, the end of the insert opposite to the base has a chamfer.

[0013] In one or more embodiments of this application, the number of screw holes is four, and the four screw holes are arranged in a parallelogram.

[0014] In one or more embodiments of this application, each of the disks has three of the aforementioned posts arranged in a circular array.

[0015] In this embodiment, the engine timing alignment sprocket fixing tool is used to fix a sprocket on a vehicle body. The sprocket has a first insertion hole. The engine timing alignment sprocket fixing tool includes two discs, a base, a nut, and a limiting member. Each disc has a pin and a threaded pin on its two sides for insertion into the first insertion hole. The base has an arc-shaped groove, and a threaded pin is inserted into each arc-shaped groove. The threaded pin extends a predetermined distance from the end of the arc-shaped groove away from the disc. The nut is threadedly connected to the threaded pin and abuts against or separates from the surface of the base on both sides of the arc-shaped groove. The limiting member is located on the side of the disc away from the base and selectively restricts the circumferential rotation of the disc. The pin makes the disc rotate synchronously with the sprocket. The nut is tightened and presses against the base, restricting the circumferential rotation of the disc. This achieves the advantages of restricting the circumferential rotation of the sprocket and making it easy to replace easily worn parts. Attached Figure Description

[0016] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein: Figure 1 The figure shows a schematic diagram of the structure of a sprocket fixing tool for engine timing correction according to this application at an angle; Figure 2 The figure shows a schematic diagram of the sprocket fixing tool for engine timing correction according to this application from another angle. Detailed Implementation

[0017] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.

[0018] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0019] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0021] Indicative engine timing alignment sprocket fixing tool, reference Figures 1 to 2 According to a preferred embodiment of the present invention, a sprocket fixing tool for engine timing adjustment is used to fix a sprocket on a vehicle body. The sprocket has a first insertion hole. The sprocket fixing tool for engine timing adjustment includes two discs 10, a base 20 and a nut 30.

[0022] Specifically, each of the disc bodies 10 has a post 101 and a threaded post 102 on each side for insertion into the first insertion hole; the base 20 has an arc-shaped groove 201, and a threaded post 102 is inserted into each arc-shaped groove 201, with one end of the threaded post 102 extending out of the groove opening of the arc-shaped groove 201 by a predetermined distance; the nut 30 is threadedly connected to the threaded post 102 and abuts against or separates from the surface of the base 20 on both sides of the groove opening of the arc-shaped groove 201.

[0023] It should be noted that during calibration, the nut 30 is threadedly connected to the threaded post 102, and the bottom surface of the nut 30 is spaced a predetermined distance from the surface of the base 20 on both sides of the opening of the arc-shaped groove 201. The maintenance personnel first insert the post 101 into the first insertion hole to connect the sprocket and the disc 10. When the disc 10 does not rotate circumferentially, the sprocket is also difficult to rotate circumferentially. Then, the nut 30 is tightened and pressed against and pressed against the surface of the base 20 on both sides of the opening of the arc-shaped groove 201. Due to the friction between the bottom surface of the nut 30 and the surface of the base 20, the disc 10 is difficult to rotate circumferentially, which in turn makes it difficult for the sprocket to rotate circumferentially, thus fixing the angle of the sprocket.

[0024] It should also be emphasized that since the sprocket is prevented from rotating circumferentially by the friction between the bottom surface of the nut 30 and the surface of the base 20, the bottom surface of the nut 30 is prone to wear. This application makes the nut 30 detachably connected to the threaded post 102, so that the nut 30 can be replaced when the bottom surface of the nut 30 is severely worn.

[0025] However, if the disc body 10 is not fixed when the nut 30 is replaced, the disc body 10 may rotate at an angle along the arc groove 201 during the process of screwing the nut 30, which makes it inconvenient to screw the nut 30.

[0026] Therefore, in this application, the sprocket fixing tool for engine timing correction further includes a limiting member 40, which is disposed on the side of the disc 10 opposite to the base 20 and selectively restricts the disc 10 from rotating circumferentially.

[0027] It should be noted that when the nut 30 needs to be replaced, the limiting member 40 restricts the circumferential rotation of the disc 10. At this time, the position of the threaded post 102 within the arc-shaped groove 201 is fixed. Therefore, when the nut 30 is tightened, there is no need to worry about the threaded post 102 sliding along the arc-shaped groove 201 during the unscrewing process. It is evident that, compared to the prior art, this application has the advantages of restricting the circumferential rotation of the sprocket and allowing for the replacement of easily worn parts.

[0028] Specifically, in this application, the disc body 10 has chain teeth, the limiting member 40 is two rotating rods, the two rotating rods are rotatably installed on the side of the disc body 10 away from the base 20, the disc body 10 has a screw hole 202, the screw hole 202 is internally threaded with a bolt, and the two rotating rods are arranged in a stacked manner in the height direction.

[0029] More specifically, there are four screw holes 202, which are arranged in a parallelogram.

[0030] It should be noted that, under normal conditions, the rotating rod is located at the middle section of the length direction of the screw holes 202 arranged in a parallelogram, that is, there are two screw holes 202 on each side of the rotating rod, and bolts are screwed into the screw holes 202. Therefore, due to the restriction of the bolts, the two rotating rods do not interfere with the movement of the disc body 10. When it is necessary to replace the nut 30, the bolts on the corresponding sides are unscrewed, and the rotating rod is brought against the disc body 10 before the bolts are screwed in again. It should be noted that at this time, the two sides of the rotating rod are respectively against the chain teeth and the bolts on the disc body 10, making it difficult for the disc body 10 to rotate circumferentially due to the restriction of the rotating rods.

[0031] Furthermore, in this application, the base 20 includes a waist portion 203 and two mounting plates 204. The waist portion 203 is located between the two mounting plates 204. Each mounting plate 204 is provided with a disc body 10. Each mounting plate 204 has two arc-shaped grooves 201 and a central hole 2041. The two arc-shaped grooves 201 are arranged symmetrically, and the central hole 2041 is located between the two arc-shaped grooves 201.

[0032] In addition, when the insertion post 101 is worn, in order to facilitate the replacement of the insertion post 101, the insertion post 101 is detachably connected to the disc body 10. Specifically, the disc body 10 has a second insertion hole 103, the insertion post 101 is threadedly connected to the second insertion hole 103, and the end of the insertion post 101 near the base 20 is flush with the end face of the disc body 10 near the base 20.

[0033] In addition, in this application, each of the disk bodies 10 is provided with three of the aforementioned insert posts 101 arranged in a circular array.

[0034] Furthermore, to facilitate the insertion of the insertion post 101 into the first insertion hole, the end of the insertion post 101 facing away from the base 20 has a chamfer.

[0035] In summary, the engine timing alignment sprocket fixing tool described in the embodiments of this application is explained, which provides advantages such as restricting the sprocket from rotating circumferentially, and allowing for the replacement of easily worn parts.

[0036] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.

Claims

1. A sprocket fixing tool for engine timing alignment, used to fix a sprocket on a vehicle body, the sprocket having a first insertion hole, characterized in that: The engine timing alignment sprocket fixing tool includes Two discs, each disc having a post and a threaded post on each side for insertion into the first socket; The base has an arc-shaped groove, and a threaded post is inserted into each arc-shaped groove, with the end of the threaded post facing away from the disk extending out of the opening of the arc-shaped groove by a predetermined distance. A nut, which is threadedly connected to the threaded post and abuts against or separates from the surface of the base on both sides of the arc-shaped groove opening; A limiting member is provided on the side of the disc body opposite to the base and selectively restricts the disc body from rotating circumferentially.

2. The sprocket fixing tool for engine timing correction according to claim 1, characterized in that: The disc body has chain teeth, and the limiting member is two rotating rods. The two rotating rods are rotatably installed on the side of the disc body away from the base. The disc body has a screw hole, and a bolt is threaded into the screw hole.

3. The sprocket fixing tool for engine timing correction according to claim 2, characterized in that: The base includes a waist section and two mounting sections. The waist section is located between the two mounting sections. Each mounting section is provided with a disc body. Each mounting section has two arc-shaped grooves and a central hole. The two arc-shaped grooves are arranged symmetrically, and the central hole is located between the two arc-shaped grooves.

4. The sprocket fixing tool for engine timing correction according to claim 3, characterized in that: The insertion post is detachably connected to the disk body.

5. The sprocket fixing tool for engine timing correction according to claim 4, characterized in that: The disc body has a second insertion hole, and the insertion post is threadedly connected to the second insertion hole. The end of the insertion post near the base is flush with the end face of the disc body near the base.

6. The sprocket fixing tool for engine timing correction according to claim 5, characterized in that: The end of the insert opposite to the base has a chamfer.

7. The sprocket fixing tool for engine timing correction according to claim 5, characterized in that: The number of screw holes is four, and the four screw holes are arranged in a parallelogram.

8. The sprocket fixing tool for engine timing correction according to claim 5, characterized in that: Each of the aforementioned disks has three of the aforementioned insert posts arranged in a circular array.

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