Splicing type cam shaft

Abstract

The utility model relates to a spliced cam shaft, and belongs to the technical field of automobile engine parts, the spliced cam shaft comprises a plurality of connecting shafts and a plurality of cam sleeves, the cam sleeves movably sleeve the connecting shafts, the two ends of each connecting shaft are respectively provided with a connecting part, the connecting parts are in threaded connection with the connecting sleeves, and the connecting sleeves are in threaded connection with the connecting shafts. The connecting shafts are connected through the connecting sleeves, locking assemblies are arranged at the connecting sleeves and used for locking the connecting parts, each locking assembly comprises a plurality of locking plates distributed on the corresponding connecting sleeve at equal intervals, one end face of each locking plate abuts against the corresponding connecting part, and the other end face of each locking plate abuts against the corresponding connecting part. The locking plate is provided with a pair of clamping columns which are oppositely arranged, and the connecting sleeve is correspondingly provided with clamping grooves for clamping and fixing the clamping columns. The connecting device has the effect that when the connecting sleeve and the connecting shaft are connected, looseness is not prone to occurring.

Description

Technical Field

[0001] The present application relates to the technical field of automobile engine parts, and in particular to a spliced ​​camshaft. Background Art

[0002] The camshaft is a component in a piston engine. Its function is to control the opening and closing of the valves. Although the speed of the camshaft in a four-stroke engine is half that of the crankshaft (in a two-stroke engine, the speed of the camshaft is the same as the crankshaft), its speed is usually still very high and it needs to withstand a large torque. Therefore, the design has very high requirements on the strength and support of the camshaft. Its material is generally high-quality alloy steel or alloy steel. Since the movement of the valves is related to the power and operating characteristics of an engine, the camshaft design occupies a very important position in the engine design process.

[0003] In the related technology, such as the Chinese utility model patent with publication number CN214837770U, a splicable camshaft is disclosed, including a connecting shaft, wherein a plurality of connecting shafts are provided, and each of the connecting shafts can be detachably connected; a shoulder, wherein a plurality of shoulders are provided, each of the shoulders is installed at both ends of the connecting shaft, and a threaded groove is opened on the circumference of the shoulder; a first connecting sleeve, wherein the first connecting sleeve is connected to the shoulder at one end of the connecting shaft by a thread; and a second connecting sleeve, wherein the second connecting sleeve is connected to the shoulder at the other end of the connecting shaft by a thread; wherein the first connecting sleeve and the second connecting sleeve are connected together by a snap-fitting manner.

[0004] With respect to the above-mentioned related technologies, the following defects were found: the first connecting sleeve is threadedly connected to the shoulder of one end of the connecting shaft, and the second connecting sleeve is threadedly connected to the shoulder of the other end of the connecting shaft. Since the camshaft rotates at a very high speed in the engine, the vibration generated is also not small. Therefore, the ends of the first connecting sleeve and the second connecting sleeve, which are respectively threadedly connected to the shoulders, may gradually loosen due to the vibration generated by the engine. Utility Model Content

[0005] In order to prevent the connecting sleeve from loosening when connected to the connecting shaft, the present application provides a spliced ​​camshaft.

[0006] The present application provides a spliced ​​camshaft, which adopts the following technical solution:

[0007] A spliced ​​camshaft comprises a plurality of connecting shafts and a plurality of cam sleeves, wherein the cam sleeves are movably mounted on the connecting shafts, and connecting parts are respectively arranged at both ends of the connecting shafts, and connecting sleeves are threadedly connected to the connecting parts, and the connecting shafts are connected via the connecting sleeves, and a locking assembly is arranged at the connecting sleeves, and the locking assembly is used to lock the connecting parts, and the locking assembly comprises a plurality of locking plates equidistantly distributed on the connecting sleeves, and one end face of the locking plate abuts against the connecting part, and a pair of relatively arranged clamping columns are arranged on the locking plate, and a corresponding clamping groove for clamping and fixing the clamping columns is arranged on the connecting sleeves.

[0008] By adopting the above technical scheme, connecting parts are respectively provided at both ends of the connecting shaft, and connecting sleeves are threadedly connected to the connecting parts, so that each connecting shaft can be connected through the connecting sleeve, and a locking assembly is provided at the connecting sleeve, and the locking assembly is used to lock the connecting part. Specifically, a plurality of equidistantly distributed locking plates are provided on the connecting sleeve, one end face of the locking plate abuts against the connecting part, and a pair of oppositely arranged clamping columns are provided on the locking plate, and a clamping groove for clamping and fixing the clamping column is correspondingly provided on the connecting sleeve, so that when the connecting part is threadedly connected to the connecting sleeve, the clamping column is clamped in the clamping groove, thereby fixing the locking plate, which is beneficial to the abutment of the locking plate and the connecting part, so that the connecting part is not easy to loosen after being connected to the connecting sleeve.

[0009] Optionally, a sliding groove is provided at one end of the locking plate away from the end abutting against the connecting portion, a pair of the clamping columns are provided in the sliding groove, and a return spring is provided between the pair of the clamping columns.

[0010] By adopting the above technical solution, a slide groove is provided at the end of the locking plate that is away from the connecting part, and a pair of clamping columns are provided in the slide groove so that the clamping columns can move in the slide groove, and a return spring is provided between the pair of clamping columns so that the clamping column can be stably clamped and fixed in the clamping groove under the action of the return spring.

[0011] Optionally, a pair of relatively arranged limiting plates are provided at the edges of the slot opening of the slide slot, and the limiting plates are used to limit the clamping column.

[0012] By adopting the above technical solution, a pair of relatively arranged limiting plates are arranged at the edges of the slot opening of the slide slot, and the limiting plates are used to limit the clamping column so that the clamping column is not easy to fall off from the slide slot.

[0013] Optionally, a channel is provided at the connecting sleeve, the channel is communicated with the slot, and the channel runs through the outer side wall of the connecting sleeve.

[0014] By adopting the above technical solution, a channel is provided at the connecting sleeve, and the channel is connected to the card slot, and the channel runs through the outer wall of the connecting sleeve, so that the card column can be disconnected from the card slot by sliding out of the card slot into the channel.

[0015] Optionally, a moving hole for movement of the locking plate is provided at an outer side wall of the connecting sleeve aligned with the locking plate, and the moving hole is communicated with the channel.

[0016] By adopting the above technical solution, a movable hole for the locking plate to move is provided at the outer side wall of the connecting sleeve aligned with the locking plate, and the movable hole is connected to the channel, so that when the card column slides out of the card slot into the channel, the locking plate can be driven to move in the movable hole by the card column.

[0017] Optionally, one end of the locking plate passing through the movable hole is provided with a first chamfer.

[0018] By adopting the above technical solution, a first chamfer is provided at one end of the locking plate passing through the moving hole, so that the locking plate is not easily stuck when passing through the moving hole.

[0019] Optionally, the connecting sleeve includes a first connecting sleeve and a second connecting sleeve, the second connecting sleeve is located inside the first connecting sleeve, and a limiting ring plate for limiting the connecting part is provided at the center position of the inner wall of the first connecting sleeve, and the end of the limiting ring plate that is away from the end connected to the inner wall of the first connecting sleeve is connected to the outer wall of the second connecting sleeve.

[0020] By adopting the above technical solution, the second connecting sleeve is arranged in the first connecting sleeve, and a limiting ring plate for limiting the connecting part is arranged at the center position of the inner wall of the first connecting sleeve. The end of the limiting ring plate that is away from the inner wall of the first connecting sleeve is connected to the outer wall of the second connecting sleeve, so that when the connecting part is threadedly connected to the connecting sleeve, the limiting ring plate can prevent the connecting part from being easily connected to the connecting sleeve too deeply or too shallowly.

[0021] Optionally, a second chamfer is provided at one end of the connecting portion close to the limiting ring plate.

[0022] By adopting the above technical solution, a second chamfer is provided at one end of the connecting portion close to the limiting ring plate, so that the connecting portion is not easily stuck with the first connecting sleeve and the second connecting sleeve.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. A connecting part is respectively provided at both ends of the connecting shaft, and a connecting sleeve is threadedly connected to the connecting part, so that each connecting shaft can be connected through the connecting sleeve, and a locking assembly is provided at the connecting sleeve, and the locking assembly is used to lock the connecting part, specifically, a plurality of equidistantly distributed locking plates are provided on the connecting sleeve, one end face of the locking plate abuts against the connecting part, and a pair of oppositely arranged clamping columns are provided on the locking plate, and a clamping groove for clamping and fixing the clamping column is correspondingly provided on the connecting sleeve, so that when the connecting part is threadedly connected with the connecting sleeve, the clamping column is clamped in the clamping groove, thereby fixing the locking plate, which is conducive to the abutment of the locking plate with the connecting part, so that the connecting part is not easy to loosen after being connected with the connecting sleeve;

[0025] 2. A slide groove is provided at one end of the locking plate away from the end abutting against the connecting portion, a pair of clamping columns are provided in the slide groove, so that the clamping columns can move in the slide groove, and a return spring is provided between the pair of clamping columns, so that the clamping columns can be stably clamped and fixed in the clamping groove under the action of the return spring;

[0026] 3. A pair of relatively arranged limit plates are arranged at the edge of the slot of the slide, and the limit plates are used to limit the clamping column so that the clamping column is not easy to fall off from the slide. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the overall structure in the embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the structure of the connecting sleeve in the embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view of the connecting sleeve in the embodiment of the present application.

[0030] Figure 4 It is a partial cross-sectional view of the overall structure in the embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the structure of the locking assembly in an embodiment of the present application.

[0032] Figure 6 yes Figure 2 Schematic diagram of the structure of part A in the middle.

[0033] Figure 7 yes Figure 5 Schematic diagram of the structure of part B.

[0034] Explanation of the accompanying drawings: 1. connecting shaft; 11. cam sleeve; 12. connecting portion; 121. second threaded portion; 122. second chamfer; 2. connecting sleeve; 21. first connecting sleeve; 211. first threaded portion; 212. movable hole; 213. slot; 214. channel; 22. second connecting sleeve; 23. limiting ring plate; 24. connecting groove; 3. locking assembly; 31. locking plate; 311. slide groove; 3111. limiting plate; 312. first chamfer; 32. clamping column; 321. limiting portion; 322. protrusion; 33. return spring. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-7 This application is described in further detail.

[0036] The present application embodiment discloses a spliced ​​camshaft. Figure 1 A spliced ​​camshaft includes a connecting shaft 1, a connecting sleeve 2 and a locking assembly 3. The connecting sleeve 2 is threadedly connected to the end of the connecting shaft 1. The locking assembly 3 is arranged on the connecting sleeve 2. When the connecting sleeve 2 is threadedly connected to the end of the connecting shaft 1, the locking assembly 3 can lock and fix the connecting shaft 1.

[0037] Reference Figure 1 Several cam sleeves 11 are sleeved on several connecting shafts 1, and connecting parts 12 are integrally formed at both ends of each connecting shaft 1. The diameter of the connecting part 12 is larger than the diameter of the connecting shaft 1. The connecting part 12 is used to connect with the connecting sleeve 2, that is, each connecting shaft 1 is connected through the connecting sleeve 2.

[0038] Reference Figure 2 and Figure 3 The connecting sleeve 2 includes a first connecting sleeve 21 and a second connecting sleeve 22. The diameter of the second connecting sleeve 22 is smaller than that of the first connecting sleeve 21. The second connecting sleeve 22 is located in the first connecting sleeve 21. A limiting ring plate 23 is integrally formed at the center position of the inner wall of the first connecting sleeve 21. The end of the limiting ring plate 23 that is away from the integrally formed end with the first connecting sleeve 21 is connected to the center position of the outer wall of the second connecting sleeve 22, so that two connecting grooves 24 are formed between the first connecting sleeve 21 and the second connecting sleeve 22 through the limiting ring plate 23. The connecting grooves 24 are used to connect with the connecting portion 12. Since the structures of the two connecting grooves 24 connected to the connecting portion 12 are the same, in this embodiment, the connection between one of the connecting grooves 24 and the connecting portion 12 is described as an example.

[0039] Reference Figure 3 and Figure 4A first threaded portion 211 is integrally formed on the inner side wall of the first connecting sleeve 21, and a second threaded portion 121 is correspondingly integrally formed on the outer side wall of the connecting portion 12. After the connecting portion 12 is aligned with the connecting groove 24 and inserted into the connecting groove 24, the first threaded portion 211 and the second threaded portion 121 are matched to perform threaded connection, so that the connecting portion 12 is fixed in the connecting groove 24. In order to prevent the connecting portion 12 from being stuck at the notch of the connecting groove 24 when the connecting portion 12 is inserted into the connecting groove 24, a second chamfer 122 is integrally formed on the outer side wall of the connecting portion 12.

[0040] Reference Figure 3 , Figure 5 and Figure 6 The locking assembly 3 is located at one end of the first connecting sleeve 21 near the notch of the connecting groove 24. The locking assembly 3 includes a plurality of locking plates 31 equidistantly distributed on the first connecting sleeve 21. The locking plates 31 are perpendicularly arranged to the outer side wall of the first connecting sleeve 21. In the present embodiment, according to the size of the first connecting sleeve 21, four equidistantly distributed locking plates 31 are preferably arranged on the first connecting sleeve 21. A plurality of equidistantly distributed moving holes 212 are provided in the first connecting sleeve 21. The moving holes 212 are provided for the locking plates 31 to move on the first connecting sleeve 21. Therefore, in the present embodiment, four equidistantly distributed moving holes 212 are provided in the first connecting sleeve 21. The moving holes 212 correspond one-to-one to the locking plates 31. The locking plates 31 are inserted into the moving holes 212.

[0041] Reference Figure 4 and Figure 5 One end of the locking plate 31 close to the notch of the connecting groove 24 abuts against the connecting portion 12, and a sliding groove 311 is opened at the end of the locking plate 31 away from the abutting connection portion 12. A pair of relatively arranged clamping columns 32 are movably arranged in the sliding groove 311, and a return spring 33 is welded in the pair of clamping columns 32, so that the pair of clamping columns 32 can move toward the two ends of the sliding groove 311 under the action of the return spring 33.

[0042] Reference Figure 4 , Figure 5 and Figure 6 A pair of clamping columns 32 protrude from the slide groove 311, and a pair of relatively arranged clamping grooves 213 are opened at one end of the first connecting sleeve 21 close to the notch of the connecting groove 24. The clamping grooves 213 are connected to the moving hole 212, and the clamping grooves 213 correspond to the clamping columns 32 one by one, so that a pair of clamping columns 32 are clamped in the clamping grooves 213 under the action of the return spring 33, which is conducive to fixing the locking plate 31, and the clamping columns 32 protrude from the first connecting sleeve 21.

[0043] Reference Figure 3 , Figure 4 and Figure 6A channel 214 is provided at one end of the first connecting sleeve 21 where the card slot 213 is provided, and the channel 214, the card slot 213 and the movable hole 212 are all connected. The channel 214 and the card slot 213 are in an "L" shape, and the channel 214 passes through the outer wall of the first connecting sleeve 21, so that when the connecting portion 12 is disconnected from the connecting groove 24 by threaded connection, the pair of card columns 32 are pinched and moved in opposite directions, so that the pair of card columns 32 move out of the card slot 213 into the channel 214, and the pair of card columns 32 move out of the first connecting sleeve 21 along the channel 214. At this time, the locking plate 31 is driven by the pair of card columns 32 to move out of the movable hole 212.

[0044] Reference Figure 4 , Figure 5 and Figure 6 In order to prevent the locking plate 31 from getting stuck at the edge of the moving hole 212 when the locking plate 31 passes through the moving hole 212 again to abut against the connecting portion 12, a first chamfer 312 is integrally formed at one end of the locking plate 31 passing through the moving hole 212.

[0045] Reference Figure 6 and Figure 7 In order to prevent the clamping column 32 from falling out of the sliding groove 311, a limiting plate 3111 is welded at the edge of the groove opposite to the sliding groove 311. The clamping column 32 includes an integrally formed limiting portion 321 and a protruding portion 322. The limiting portion 321 is located in the sliding groove 311, and the two ends of the return spring 33 are respectively welded to the limiting portion 321. The limiting portion 321 is limited in the sliding groove 311 by the limiting plate 3111. The protruding portion 322 protrudes out of the sliding groove 311 and the first connecting sleeve 21, and the protruding portion 322 is not limited by the limiting plate 3111.

[0046] The implementation principle of a spliced ​​camshaft in an embodiment of the present application is as follows: align the connecting part 12 with the connecting groove 24 and insert it into the connecting groove 24, rotate the connecting shaft 1 so that the first threaded part 211 and the second threaded part 121 can be threadedly connected, and when the connecting part 12 abuts against the limiting ring plate 23, the connecting part 12 and the connecting groove 24 complete the threaded connection. In order to further stabilize the connection between the connecting part 12 and the installation groove, align the locking plate 31 with the moving hole 212 and insert it into the moving hole 212, pinch the protrusions 322 of a pair of clamping columns 32 and move them into the channel 214, and when the pair of clamping columns 32 move to the junction of the channel 214 and the clamping groove 213, release the protrusions 322 of the pair of clamping columns 32, and under the action of the reset spring 33, the protrusions 322 of the pair of clamping columns 32 are clamped into the clamping groove 213, and at this time, the locking plate 31 abuts against the connecting part 12.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A spliced ​​camshaft, characterized in that: The invention comprises a plurality of connecting shafts (1) and a plurality of cam sleeves (11), wherein the cam sleeves (11) are movably sleeved on the connecting shafts (1), and connecting parts (12) are respectively provided at both ends of the connecting shafts (1), and connecting sleeves (2) are threadedly connected to the connecting parts (12), and the connecting shafts (1) are connected to each other via the connecting sleeves (2), and a locking assembly (3) is provided at the connecting sleeves (2), and the locking assembly (3) is used to lock the connecting parts (12), and the locking assembly (3) comprises a plurality of locking plates (31) equidistantly distributed on the connecting sleeves (2), and one end surface of the locking plate (31) is in contact with the connecting part (12), and a pair of oppositely arranged clamping columns (32) are provided on the locking plate (31), and a clamping groove (213) for clamping and fixing the clamping column (32) is correspondingly provided on the connecting sleeve (2).

2. A spliced ​​camshaft according to claim 1, characterized in that: A sliding groove (311) is provided at one end of the locking plate (31) that is away from the connecting portion (12), a pair of clamping columns (32) are arranged in the sliding groove (311), and a return spring (33) is provided between the pair of clamping columns (32).

3. A spliced ​​camshaft according to claim 2, characterized in that: A pair of oppositely arranged limiting plates (3111) are provided at the edges of the notch of the slide groove (311), and the limiting plates (3111) are used to limit the position of the clamping column (32).

4. The spliced ​​camshaft according to claim 2, characterized in that: The connecting sleeve (2) is provided with a channel (214), the channel (214) is connected to the clamping groove (213), and the channel (214) passes through the outer side wall of the connecting sleeve (2).

5. A spliced ​​camshaft according to claim 4, characterized in that: A moving hole (212) for the locking plate (31) to move is provided on the outer side wall of the connecting sleeve (2) aligned with the locking plate (31), and the moving hole (212) is communicated with the channel (214).

6. The spliced ​​camshaft according to claim 5, characterized in that: One end of the locking plate (31) passing through the moving hole (212) is provided with a first chamfer (312).

7. The spliced ​​camshaft according to claim 5, characterized in that: The connecting sleeve (2) comprises a first connecting sleeve (21) and a second connecting sleeve (22); the second connecting sleeve (22) is located inside the first connecting sleeve (21); a limiting ring plate (23) for limiting the connecting portion (12) is provided at a central position of an inner side wall of the first connecting sleeve (21); an end of the limiting ring plate (23) which is away from being connected to the inner side wall of the first connecting sleeve (21) is connected to an outer side wall of the second connecting sleeve (22).

8. The spliced ​​camshaft according to claim 7, characterized in that: A second chamfer (122) is provided at one end of the connecting portion (12) close to the limiting ring plate (23).

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