Camshaft gear fixing tool for engine timing correction

Abstract

The application relates to the technical field of engine maintenance tools, in particular to a camshaft gear fixing tool for engine timing correction, which comprises a clamp plate combination and two wear-resistant sheets, the clamp plate combination comprises an upper clamp plate, a lower clamp plate and fasteners, the upper clamp plate and the lower clamp plate are both provided with four threaded holes, the threaded holes on the upper clamp plate and the threaded holes on the lower clamp plate are in one-to-one correspondence, each fastener is screwed into the threaded holes of the corresponding upper clamp plate and lower clamp plate in sequence, the upper clamp plate and the lower clamp plate are both provided with a concave arc groove, one side of the concave arc groove is provided with a replacement groove, and the end of the upper clamp plate and the lower clamp plate, which is away from the concave arc groove, is provided with a semicircular hole; each replacement groove is provided with a wear-resistant sheet, and the wear-resistant sheet is detachably connected with the corresponding upper clamp plate or lower clamp plate. The detachable wear-resistant sheet can be replaced when the wear-resistant sheet is worn, the contact surface can be replaced, and the replacement cost is lower.

Description

Technical Field

[0001] This application relates to the field of engine repair tool technology, and more specifically to a camshaft gear fixing tool for engine timing calibration. Background Technology

[0002] The engine timing system is a system that ensures that each component of the engine performs its proper action at the appropriate time. Patent document (CN204212824U) discloses an engine timing system, including a camshaft and a gear located on one side of the camshaft. The camshaft gear fixing tool for timing adjustment is a special tool used to fix the gear at the end of the camshaft during timing adjustment to prevent it from rotating circumferentially.

[0003] There is a camshaft gear fixing tool for engine timing calibration, such as Figure 1 As shown, the device includes an upper clamping plate 90 and a lower clamping plate 91. Each of the upper clamping plate 90 and the lower clamping plate 91 has a clamping groove 92 at one end and a notch 93 at the other end. The upper clamping plate 90 and the lower clamping plate 91 are connected by bolts. In use, an external gear is inserted into the clamping groove 92. By tightening the bolts, the upper clamping plate 90 and the lower clamping plate 91 clamp the external gear. By abutting the notch 93 against the side wall of the external bolt, the external nut is tightened and presses down on the upper clamping plate 90, thus fixing the position of the upper clamping plate 90. Since the external gear is clamped by the upper clamping plate 90 and the lower clamping plate 91, the external gear does not rotate circumferentially, thereby fixing the external gear. However, since the opposing sides of the upper clamping plate 90 and the lower clamping plate 91 are easily scratched by the meshing teeth when clamping the gear, after long-term use, the surfaces of the upper clamping plate 90 and the lower clamping plate 91 may become uneven, resulting in a smaller contact area between the upper clamping plate 90 and the lower clamping plate 91 and the surface of the external camshaft gear. This makes it difficult to completely clamp the external camshaft gear, or causes the external camshaft gear to rotate circumferentially during maintenance. In this case, it is necessary to replace the entire engine timing alignment camshaft gear fixing tool, which is costly.

[0004] Therefore, there is a need for a camshaft gear fixing tool for engine timing calibration with a replaceable contact surface and lower replacement cost. Summary of the Invention

[0005] The main objective of this application is to provide a camshaft gear fixing tool for engine timing alignment. The tool includes a clamping plate assembly and two wear-resistant plates. The clamping plate assembly includes an upper clamping plate, a lower clamping plate, and fasteners. Both the upper and lower clamping plates have four threaded holes, with each threaded hole on the upper clamping plate corresponding to one on the lower clamping plate. Each fastener is sequentially screwed into the corresponding threaded hole on the upper or lower clamping plate. Both the upper and lower clamping plates have concave grooves, with a replacement groove on one side of each groove. The end of each clamping plate opposite to the concave groove has a semi-circular hole. Each replacement groove contains a wear-resistant plate, which is detachably connected to the corresponding upper or lower clamping plate. By providing replaceable wear-resistant plates, they can be replaced when worn. Compared to existing technologies, this method offers the advantages of replaceable contact surfaces and lower replacement costs.

[0006] Another objective of this application is to provide a camshaft gear fixing tool for engine timing calibration, wherein each wear-resistant piece further includes a first clearance groove, a foolproof notch, and a right-angle portion. The first clearance groove is located between two through holes, and the foolproof notch is located on one side of the wear-resistant piece. When the wear-resistant piece is placed in the replacement groove, another fastener extends into the first clearance groove, and yet another fastener extends into the foolproof notch to prevent the wear-resistant piece from being placed backwards.

[0007] To achieve at least one of the above-mentioned objectives, this application provides a camshaft gear fixing tool for engine timing alignment, wherein the camshaft gear fixing tool for engine timing alignment includes: A clamping plate assembly, comprising an upper clamping plate, a lower clamping plate, and fasteners, wherein both the upper and lower clamping plates have four threaded holes, and the threaded holes on the upper clamping plate correspond one-to-one with the threaded holes on the lower clamping plate. Each fastener is sequentially screwed into the corresponding threaded hole of the upper and lower clamping plates. Both the upper and lower clamping plates have concave arc grooves, one side of which has a replacement groove. The ends of the upper and lower clamping plates opposite to the concave arc grooves each have semi-circular holes. Two wear-resistant plates are provided, and each of the replacement slots is provided with one wear-resistant plate. The wear-resistant plate is detachably connected to the corresponding upper clamping plate or lower clamping plate.

[0008] In one or more embodiments of this application, each wear-resistant sheet includes two through holes, and when the wear-resistant sheet is placed in the replacement groove, the two fasteners pass through the two through holes.

[0009] In one or more embodiments of this application, each wear-resistant sheet further includes a first clearance groove, a foolproof notch, and a right-angle portion. The first clearance groove is located between the two through holes, and the foolproof notch is located on one side of the wear-resistant sheet. When the wear-resistant sheet is placed in the replacement groove, another fastener extends into the first clearance groove, and yet another fastener extends into the foolproof notch.

[0010] In one or more embodiments of this application, both wear-resistant sheets have knurling on their opposing sides in the height direction.

[0011] In one or more embodiments of this application, the wear-resistant sheet and each of the replacement grooves have a curved notch on the side opposite to the concave groove.

[0012] In one or more embodiments of this application, the replacement groove of the lower clamping plate has two limiting grooves on the side wall opposite to the concave arc groove.

[0013] In this embodiment, the camshaft gear fixing tool for engine timing alignment includes a clamping plate assembly and two wear-resistant plates. The clamping plate assembly includes an upper clamping plate, a lower clamping plate, and fasteners. Both the upper and lower clamping plates have four threaded holes, with the threaded holes on the upper clamping plate corresponding one-to-one with those on the lower clamping plate. Each fastener is screwed into the corresponding threaded hole on the upper or lower clamping plate in sequence. Both the upper and lower clamping plates have concave arc grooves, with a replacement groove on one side of the concave arc groove. The end of both the upper and lower clamping plates opposite to the concave arc groove has a semi-circular hole. Each replacement groove contains a wear-resistant plate, and the wear-resistant plate is detachably connected to the corresponding upper or lower clamping plate. By providing replaceable wear-resistant plates, they can be replaced when worn. Compared with the prior art, this has the advantages of replaceable contact surfaces and lower replacement costs. Attached Figure Description

[0014] 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 diagram illustrates the structure of a camshaft gear fixing tool for engine timing adjustment. Figure 2 The figure shows a schematic diagram of the structure of a camshaft gear fixing tool for engine timing correction according to this application; Figure 3 The diagram illustrates the structure of the wear-resistant sheet; Figure 4 The diagram illustrates a fastener passing through a wear-resistant plate. Detailed Implementation

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Indicative engine timing alignment camshaft gear fixing tool, reference Figures 2 to 4 A preferred embodiment of the present invention provides a camshaft gear fixing tool for engine timing correction, comprising a clamp assembly 10.

[0020] Specifically, such as Figure 2 As shown, the clamping plate assembly 10 includes an upper clamping plate 101, a lower clamping plate 102, and fasteners 103. Both the upper clamping plate 101 and the lower clamping plate 102 have four threaded holes 1011. The threaded holes 1011 on the upper clamping plate 101 correspond one-to-one with the threaded holes 1011 on the lower clamping plate 102. Each fastener 103 is screwed into the corresponding threaded hole 1011 of the upper clamping plate 101 and the lower clamping plate 102 in sequence. Both the upper clamping plate 101 and the lower clamping plate 102 have concave arc grooves 1012. The end of the upper clamping plate 101 and the lower clamping plate 102 opposite to the concave arc grooves 1012 has a semi-circular hole 1013.

[0021] It should be noted that, in use, the upper clamping plate 101 and the lower clamping plate 102 are spaced a predetermined distance apart in the height direction. By positioning the upper clamping plate 101 and the lower clamping plate 102 on both sides of the external camshaft gear, the upper clamping plate 101 and the lower clamping plate 102 are close to the external camshaft gear, and the external camshaft gear extends into the concave arc groove 1012. By tightening the fasteners 103, the upper clamping plate 101 and the lower clamping plate 102 clamp the external camshaft gear. Then, the wall of the semi-circular hole 1013 is brought into contact with the side wall of the bolt on the external frame. Then, the bolt is tightened, and the nut on the bolt presses the upper clamping plate 101, thereby fixing the position of the upper clamping plate 101. Since the upper clamping plate 101 and the lower clamping plate 102 clamp the external camshaft gear, the rotation of the external camshaft gear is restricted.

[0022] However, after long-term use, the two side walls of the concave groove 1012 are easily scratched by the meshing part of the gear when clamping the gear. After long-term use, the surfaces of the upper clamping plate 101 and the lower clamping plate 102 may become uneven, which reduces the contact area between the upper clamping plate 101 and the lower clamping plate 102 and the surface of the external camshaft gear, making it difficult to fully clamp the external camshaft gear, or causing the external camshaft gear to rotate circumferentially during maintenance. Replacing the entire engine timing alignment camshaft gear fixing tool would be costly.

[0023] Therefore, in this application, as Figure 2 As shown, one side of the concave arc groove 1012 has a replacement groove 1014. The engine timing calibration camshaft gear fixing tool also includes two wear-resistant plates 20. Each replacement groove 1014 is provided with one wear-resistant plate 20, and the wear-resistant plate 20 is detachably connected to the corresponding upper clamping plate 101 or lower clamping plate 102.

[0024] It should be noted that during use, the wear-resistant plate 20 actually contacts the external camshaft gear. By making the wear-resistant plate 20 detachably connected to the clamp assembly 10, when the surface of the wear-resistant plate 20 is severely worn and uneven, the worn wear-resistant plate 20 can be removed and replaced with a new wear-resistant plate 20. Compared with the prior art, which requires the entire engine timing alignment camshaft gear fixing tool to be replaced, this application has the advantages of replaceable contact surface and lower replacement cost.

[0025] Specifically, to enable the fastener 103 to fix the wear-resistant piece 20 within the replacement slot 1014, such as... Figure 2 As shown, each wear-resistant sheet 20 includes two through holes 201. When the wear-resistant sheet 20 is placed in the replacement groove 1014, the two fasteners 103 pass through the two through holes 201.

[0026] It should be noted that when installing the new wear-resistant plate 20 into the replacement slot 1014, first unscrew the two corresponding fasteners 103 and separate them from the lower clamping plate 102, then remove the old wear-resistant plate 20 and place the new wear-resistant plate 20 into the replacement slot 1014. At this time, the two through holes 201 on the wear-resistant plate 20 are directly opposite the two unscrewed fasteners 103. By tightening the two fasteners 103 again and threading them to the lower clamping plate 102, the wear-resistant plate 20 is fixedly installed in the replacement slot 1014 because the two fasteners 103 pass through the through holes 201 of the wear-resistant plate 20.

[0027] Furthermore, in this application, as Figure 2 As shown, each wear-resistant piece 20 further includes a first clearance groove 202, a foolproof notch 203, and a right-angle portion 204. The first clearance groove 202 is located between the two through holes 201, and the foolproof notch 203 is located on one side of the wear-resistant piece 20. When the wear-resistant piece 20 is placed in the replacement groove 1014, another fastener 103 extends into the first clearance groove 202, and yet another fastener 103 extends into the foolproof notch 203.

[0028] It should be noted that by setting the first clearance groove 202 and the right angle portion 204, if the wear-resistant piece 20 is placed in reverse, the right angle portion 204 will abut against a fastener 103, making it impossible to completely insert the wear-resistant piece 20 into the replacement groove 1014, thereby achieving the purpose of preventing installation errors.

[0029] Furthermore, to improve friction and to further prevent installers from placing the wear-resistant plates 20 backwards, both wear-resistant plates 20 have knurled surfaces facing each other in the height direction.

[0030] Additionally, in this application, such as Figure 2 As shown, the wear-resistant plate 20 and each of the replacement grooves 1014 have a curved notch 1015 on the side opposite to the concave groove 1012.

[0031] Furthermore, since the external engine timing system also has two fixed protrusions on one side of the camshaft gear, in order to adapt to a specific timing system, such as... Figure 2 As shown, the replacement groove 1014 of the lower clamping plate 102 has two limiting grooves 1021 on the side wall opposite to the concave arc groove 1012.

[0032] It should be noted that after the upper clamping plate 101 and the lower clamping plate 102 clamp the external camshaft gear, the external fixing protrusion is inserted into the curved notch 1015, further restricting the lower clamping plate 102 from rotating circumferentially.

[0033] In summary, the engine timing alignment camshaft gear fixing tool described in the embodiments of this application is explained, which provides advantages such as replaceable contact surface and lower replacement cost for the engine timing alignment camshaft gear fixing tool.

[0034] 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 camshaft gear fixing tool for engine timing correction, characterized by: The engine timing alignment camshaft gear fixing tool includes A clamping plate assembly, comprising an upper clamping plate, a lower clamping plate, and fasteners, wherein both the upper and lower clamping plates have four threaded holes, and the threaded holes on the upper clamping plate correspond one-to-one with the threaded holes on the lower clamping plate. Each fastener is sequentially screwed into the corresponding threaded hole of the upper and lower clamping plates. Both the upper and lower clamping plates have concave arc grooves, one side of which has a replacement groove. The ends of the upper and lower clamping plates opposite to the concave arc grooves each have semi-circular holes. Two wear-resistant plates are provided, and each of the replacement slots is provided with one wear-resistant plate. The wear-resistant plate is detachably connected to the corresponding upper clamping plate or lower clamping plate.

2. The camshaft gear fixing tool for engine timing correction according to claim 1, characterized in that: Each of the wear-resistant plates includes two through holes, and when the wear-resistant plate is placed in the replacement groove, the two fasteners pass through the two through holes.

3. The camshaft gear fixing tool for engine timing correction according to claim 2, characterized in that: Each wear-resistant sheet further includes a first clearance groove, a foolproof notch, and a right-angle portion. The first clearance groove is located between the two through holes, and the foolproof notch is located on one side of the wear-resistant sheet. When the wear-resistant sheet is placed in the replacement groove, another fastener extends into the first clearance groove, and yet another fastener extends into the foolproof notch.

4. The camshaft gear fixing tool for engine timing correction according to claim 3, characterized in that: Both wear-resistant plates have knurling on their opposing sides in the height direction.

5. The camshaft gear fixing tool for engine timing correction according to claim 4, characterized in that: The wear-resistant sheet and each of the replacement grooves have a curved notch on the side opposite to the concave groove.

6. The camshaft gear fixing tool for engine timing correction according to claim 5, characterized in that: The replacement groove of the lower clamping plate has two limiting grooves on the side wall opposite to the concave arc groove.

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