Camshaft fixing tool for engine timing correction

Abstract

The application relates to the technical field of engine timing tools, in particular to a camshaft fixing tool for engine timing correction, which comprises a rod body combination and a bolt combination, the rod body combination comprises a first rod body and a second rod body, the first rod body and the second rod body are provided with first insertion holes at opposite ends, the hole walls of the first insertion holes are provided with tooth grooves, and the opposite ends of the first rod body and the second rod body are bolt-connected; the bolt combination comprises a first bolt and a second bolt, the first bolt and the second bolt are provided with convex teeth at one end, the first bolt and the second bolt are respectively inserted into the first insertion holes on the first rod body and the second rod body, and the convex teeth are embedded into the tooth grooves, the first rod body and the first bolt are synchronously circumferentially rotated, the second rod body and the second bolt are synchronously circumferentially rotated, the first bolt or the second bolt can be replaced when the first bolt or the second bolt is worn, and the advantages that the bolt and the rod body can be replaced and the replacement cost is lower are realized.

Description

Technical Field

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

[0002] The engine timing system ensures that each component of the engine performs its proper action at the appropriate time. Patent document (CN115263637A) discloses an engine timing system including a crankshaft, a camshaft, and a belt or chain drive that powers the crankshaft and camshaft. A camshaft fixing tool for engine timing alignment is used to fix the two camshafts and prevent them from rotating circumferentially.

[0003] There is a camshaft fixing tool for engine timing calibration, such as Figure 1 As shown, the device includes two rods 90 and two pins 91. Each of the opposite ends of the two rods 90 has a socket, and the opposite ends of the two rods 90 are connected by bolts. Each socket contains a pin 91. During timing calibration, the two pins 91 are inserted into the two camshafts respectively, achieving synchronous rotation between the pins 91 and the camshafts. By bolting one end of the two rods 90, the pins 91 cannot rotate circumferentially, thus restricting the circumferential rotation of the connected camshaft and achieving circumferential fixation of the camshaft. It should be noted that the rods 90 and the pins 91 are fixedly connected by welding. It should also be noted that, since the pin 91 and the rod 90 are fixedly connected, the pin 91 is prone to wear after long-term use, which may cause the pin 91 to deflect slightly on the rod 90. This will affect the fixing effect. Since the pin 91 and the rod 90 are fixedly connected, the entire pin must be replaced, which is costly.

[0004] Therefore, there is a need for a camshaft fixing tool for engine timing alignment that allows for the replacement of pins and rods at a lower cost. Summary of the Invention

[0005] The main objective of this application is to provide a camshaft fixing tool for engine timing correction. The camshaft fixing tool includes a rod assembly and a pin assembly. The rod assembly includes a first rod and a second rod, each with a first insertion hole at its opposite end. The wall of the first insertion hole has a toothed groove, and the opposite ends of the first and second rods are bolted together. The pin assembly includes a first pin and a second pin, each with a protruding tooth at one end. The first pin and the second pin are respectively inserted into the first insertion hole on the first and second rods, and the protruding tooth engages with the toothed groove. By providing the protruding tooth and the toothed groove, the first rod and the first pin rotate synchronously circumferentially, and the second rod and the second pin rotate synchronously circumferentially. When the first pin or the second pin wears, it can be replaced. Compared with the prior art, this tool has the advantages of replaceable pins and rods and lower replacement costs.

[0006] Another objective of this application is to provide a camshaft fixing tool for engine timing adjustment, wherein the first rod and the second rod have a retaining ring groove at one end with the protruding teeth, and a first retaining ring is sleeved in the retaining ring groove. One end of the first retaining ring abuts against the corresponding first rod or second rod, and the other end of the first retaining ring abuts against the side wall of the retaining ring groove. The first rod and the second rod also have a shoulder portion. When the first pin or the second pin is inserted into the first rod or the second rod, the side walls of the first rod or the second rod located at both ends of the first insertion hole abut against the shoulder portion and the first retaining ring, respectively, preventing the first pin or the second pin from dislodging from the first insertion hole.

[0007] To achieve at least one of the above-mentioned objectives, this application provides a camshaft fixing tool for engine timing adjustment, wherein the camshaft fixing tool for engine timing adjustment includes: A rod assembly, comprising a first rod and a second rod, wherein each of the opposite ends of the first rod and the second rod has a first insertion hole, the wall of the first insertion hole has a toothed groove, and the opposite ends of the first rod and the second rod are bolted together. A pin assembly, comprising a first pin and a second pin, wherein one end of the first pin and the second pin has a protruding tooth, the first pin and the second pin are respectively inserted into the first insertion hole on the first rod and the second rod, and the protruding tooth engages with the tooth groove.

[0008] In one or more embodiments of this application, the first rod and the second rod have a retaining ring groove at the end with the protruding tooth, and a first retaining ring is sleeved in the retaining ring groove. One end of the first retaining ring abuts against the corresponding first rod or second rod, and the other end of the first retaining ring abuts against the side wall of the retaining ring groove. The first rod and the second rod also have a shoulder portion. When the first pin or the second pin is inserted into the first rod or the second rod, the side walls of the first rod or the second rod located at both ends of the first insertion hole abut against the shoulder portion and the first retaining ring, respectively.

[0009] In one or more embodiments of this application, the first pin and the second pin each have a strip-shaped portion at the end opposite to the retaining ring groove, and the middle section of the strip-shaped portion has a waist-shaped protrusion.

[0010] In one or more embodiments of this application, the second rod body has an extension end on the side having the first insertion hole, the extension end having a second insertion hole, and the pin assembly further includes a fixing pin, the fixing pin passing through the second insertion hole.

[0011] In one or more embodiments of this application, both the first pin and the second pin have a square hole at the end opposite to the strip portion.

[0012] In one or more embodiments of this application, the first rod body has two threaded holes at one end near the second rod body, the second rod body has a waist-shaped groove at one end near the first rod body, and the camshaft fixing tool for engine timing correction further includes two bolts, both of which pass through the waist-shaped groove and are threadedly connected to the corresponding threaded holes.

[0013] In one or more embodiments of this application, a second retaining ring is fitted onto the retaining pin.

[0014] In this embodiment, the camshaft fixing tool for engine timing correction includes a rod assembly and a pin assembly. The rod assembly includes a first rod and a second rod, each with a first insertion hole at its opposite end. The wall of the first insertion hole has a toothed groove, and the opposite ends of the first and second rods are bolted together. The pin assembly includes a first pin and a second pin, each with a protruding tooth at one end. The first pin and the second pin are respectively inserted into the first insertion holes on the first and second rods, and the protruding tooth engages with the toothed groove. By setting the protruding tooth and the toothed groove, the first rod and the first pin rotate synchronously in a circumferential direction, and the second rod and the second pin rotate synchronously in a circumferential direction. When the first pin or the second pin is worn, the first pin or the second pin can be replaced. Compared with the prior art, this has the advantages of replaceable pins and rods and lower replacement costs. Attached Figure Description

[0015] 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 fixing tool for engine timing calibration. Figure 2 The figure shows a schematic diagram of the structure of a camshaft fixing tool for engine timing correction according to this application at a certain angle; Figure 3 The figure shows a schematic diagram of the structure of a camshaft fixing tool for engine timing correction according to this application from another angle; Figure 4 The diagram shows a schematic representation of the first rod. Figure 5 The diagram shows the structure of the first pin. Detailed Implementation

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] Indicative engine timing alignment camshaft fixing tool, reference Figures 2 to 5 According to a preferred embodiment of the present invention, a camshaft fixing tool for engine timing adjustment includes a rod assembly 10 and a pin assembly 20.

[0021] Specifically, the rod assembly 10 includes a first rod 101 and a second rod 102. Each of the opposite ends of the first rod 101 and the second rod 102 has a first insertion hole 1011. The wall of the first insertion hole 1011 has a toothed groove 1012. The opposite ends of the first rod 101 and the second rod 102 are bolted together. Additionally, the pin assembly 20 includes a first pin 201 and a second pin 202. Each end of the first pin 201 and the second pin 202 has a protruding tooth 2011. The first pin 201 and the second pin 202 are respectively inserted into the first insertion hole 1011 on the first rod 101 and the second rod 102, and the protruding tooth 2011 engages with the toothed groove 1012.

[0022] It should be noted that by providing the toothed groove 1012 on the first insertion hole 1011 and by providing the protruding teeth 2011 on the first pin 201 and the second pin 202 that cooperate with the toothed groove 1012, when the first rod 101 or the second rod 102 passes through the first insertion hole 1011 and the protruding teeth 2011 are engaged with the toothed groove 1012, when the first rod 101 or the second rod 102 rotates circumferentially, the corresponding first pin 201 or the second pin 202 will also rotate circumferentially, and vice versa. Furthermore, during timing calibration, the operator inserts the first pin 201 and the second pin 202 into the corresponding holes at one end of the camshaft, so that the first pin 201 and the second pin 202 rotate synchronously with the corresponding camshaft. Since the first rod 101 or the second rod 102 rotates synchronously with the corresponding first pin 201 or the second pin 202, the operator then bolts the first rod 101 and the second rod 102 together, preventing the first rod 101 and the second rod 102 from rotating circumferentially. This restricts the two external camshafts from rotating circumferentially, thereby achieving the technical objective of restricting the two external camshafts from rotating circumferentially. Furthermore, after long-term use, if the end of the first pin 201 or the second pin 202 is worn, the operator only needs to replace the first pin 201 or the second pin 202, that is, remove the worn first pin 201 or the second pin 202 and insert the new first pin 201 or the second pin 202 into the corresponding first rod 101 or the second rod 102, without having to replace the entire camshaft fixing tool for engine timing correction as in the prior art. This has the advantages of replaceable pins and rods and lower replacement costs.

[0023] Furthermore, to prevent the first pin 201 or the second pin 202 from dislodging from the corresponding first insertion hole 1011, the first rod 101 and the second rod 102 have a retaining ring groove 1013 at one end of the tooth 2011. A first retaining ring 1014 is sleeved in the retaining ring groove 1013. One end of the first retaining ring 1014 abuts against the corresponding first rod 101 or second rod 102, and the other end of the first retaining ring 1014 abuts against the side wall of the retaining ring groove 1013. The first rod 101 and the second rod 102 also have a shoulder portion 1015. When the first pin 201 or the second pin 202 is inserted into the first rod 101 or the second rod 102, the side walls of the first rod 101 or the second rod 102 located at both ends of the first insertion hole 1011 abut against the shoulder portion 1015 and the first retaining ring 1014, respectively.

[0024] It should be noted that the shoulder portion 1015 and the first retaining ring 1014 provide axial restraint for the first rod 101 and the second rod 102, preventing the first pin 201 or the second pin 202 from disengaging from the corresponding first insertion hole 1011 during the handling of the engine timing adjustment camshaft fixing tool. When it is necessary to replace the first pin 201 or the second pin 202, the first retaining ring 1014 can be removed first, and then the first pin 201 or the second pin 202 can be pulled out.

[0025] Furthermore, to achieve synchronous circumferential rotation between the pin assembly 20 and the external camshaft, the ends of the first pin 201 and the second pin 202 opposite to the retaining ring groove 1013 each have a strip-shaped portion 2012. The middle section of the strip-shaped portion 2012 has a waist-shaped protrusion 2013. It should be noted that, correspondingly, one end of the external camshaft has a contoured strip-shaped hole, so that after the strip-shaped portion 2012 extends into the strip-shaped hole, the pin assembly 20 and the external camshaft rotate synchronously in the circumferential direction.

[0026] Furthermore, to further secure the rod assembly 10, the second rod 102 has an extension end 1021 on the side with the first insertion hole 1011, and the extension end 1021 has a second insertion hole 1022. The pin assembly 20 also includes a fixing pin 203, which passes through the second insertion hole 1022.

[0027] It should be noted that during timing calibration, the retaining pin 203 is inserted into the corresponding hole above the external camshaft. Furthermore, the retaining pin 203 also restricts the circumferential rotation of the second rod 102.

[0028] Furthermore, in this application, both the first pin 201 and the second pin 202 have a square hole 2021 at the end opposite to the strip portion 2012. Additionally, in this application, a second retaining ring 2031 is fitted onto the fixing pin 203.

[0029] Furthermore, to achieve the bolted connection between the first rod 101 and the second rod 102, the first rod 101 has two threaded holes 1016 at one end near the second rod 102, and the second rod 102 has a waist-shaped groove 1023 at one end near the first rod 101. The camshaft fixing tool for engine timing correction also includes two bolts, both of which pass through the waist-shaped groove 1023 and are threadedly connected to the corresponding threaded holes 1016.

[0030] In summary, the camshaft fixing tool for engine timing correction described in the embodiments of this application is explained, which provides advantages such as replaceable pins and rods and lower replacement costs.

[0031] 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 fixing tool for engine timing calibration, characterized in that: The engine timing alignment camshaft fixing tool includes A rod assembly, comprising a first rod and a second rod, wherein each of the opposite ends of the first rod and the second rod has a first insertion hole, the wall of the first insertion hole has a toothed groove, and the opposite ends of the first rod and the second rod are bolted together. A pin assembly, comprising a first pin and a second pin, wherein one end of the first pin and the second pin has a protruding tooth, the first pin and the second pin are respectively inserted into the first insertion hole on the first rod and the second rod, and the protruding tooth engages with the tooth groove.

2. The camshaft fixing tool for engine timing correction according to claim 1, characterized in that: The first rod and the second rod have a retaining ring groove at the end with the protruding tooth. A first retaining ring is sleeved in the retaining ring groove. One end of the first retaining ring abuts against the corresponding first rod or second rod, and the other end of the first retaining ring abuts against the side wall of the retaining ring groove. The first rod and the second rod also have a shoulder portion. When the first pin or the second pin is inserted into the first rod or the second rod, the side walls of the first rod or the second rod located at both ends of the first insertion hole abut against the shoulder portion and the first retaining ring, respectively.

3. The camshaft fixing tool for engine timing correction according to claim 2, characterized in that: Both the first pin and the second pin have a strip-shaped portion at the end opposite to the retaining ring groove, and the middle section of the strip-shaped portion has a waist-shaped protrusion.

4. The camshaft fixing tool for engine timing correction according to claim 3, characterized in that: The second rod body has an extension end on the side with the first insertion hole, and the extension end has a second insertion hole. The pin assembly also includes a fixing pin, which passes through the second insertion hole.

5. The camshaft fixing tool for engine timing correction according to claim 4, characterized in that: Both the first pin and the second pin have square holes at the ends opposite to the strip portion.

6. The camshaft fixing tool for engine timing correction according to claim 5, characterized in that: The first rod has two threaded holes at one end near the second rod, and the second rod has a waist-shaped groove at one end near the first rod. The engine timing alignment camshaft fixing tool also includes two bolts, both of which pass through the waist-shaped groove and are threadedly connected to the corresponding threaded holes.

7. The camshaft fixing tool for engine timing correction according to claim 6, characterized in that: A second retaining ring is fitted onto the fixing pin.

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