Camshaft assembly, camshaft assembly mounting device, engine and engineering equipment

Abstract

The utility model relates to the technical field of engines, and discloses a cam shaft assembly, a cam shaft assembly mounting device, an engine and engineering equipment. The gear is in interference fit with the shaft end of the optical shaft part of the cam shaft; the thrust structure is in interference fit with the polished shaft part of the cam shaft, the thrust structure and the gear are arranged at an interval, and a preset distance is formed between the two corresponding faces of the thrust structure and the gear. According to the utility model, the thrust structure and the gear are integrally arranged on the cam shaft, so that the integrated design is realized; when the cam shaft assembly and the mounting base are mounted in a matched mode, the preset distance between the two corresponding faces of the thrust structure and the gear is matched with the distance between the abutting faces of the two opposite sides of the mounting base, positioning mounting of the cam shaft assembly is achieved, and therefore axial positioning of the cam shaft assembly is achieved; the cam part of the camshaft is accurately matched with the intake and exhaust rocker arm roller, so that the normal operation of an engine is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a camshaft assembly, a camshaft assembly mounting device, an engine and engineering equipment. Background Art

[0002] The camshaft is an indispensable part of the engine valve train, which ensures that the engine's intake and exhaust valves open at the correct phase and lift. A gear is installed at one end of the camshaft to obtain driving force, and at the same time, each cam on the camshaft drives the intake and exhaust rocker rollers at high speed to ensure that the intake and exhaust valves can overcome the valve spring force to achieve normal opening and closing. For the entire driving process, the axial positioning of the camshaft is very important. If the camshaft is not axially positioned, there may be axial misalignment between the cam on the camshaft and the intake and exhaust rocker rollers, thus affecting the normal operation of the engine. Utility Model Content

[0003] In view of this, the utility model provides a camshaft assembly, a camshaft assembly mounting device, an engine and engineering equipment to solve the problem that the camshaft assembly in the prior art is not axially positioned, and there may be axial misalignment between the cam on the camshaft and the intake and exhaust rocker arm rollers, thereby affecting the normal operation of the engine.

[0004] In the first aspect, the utility model provides a camshaft assembly, comprising: a camshaft having a cam portion and an optical axis portion; a gear, which is interference fit with the shaft end of the optical axis portion of the camshaft; a thrust structure, which is interference fit with the optical axis portion of the camshaft and is spaced apart from the gear, and a predetermined spacing is provided between two corresponding surfaces of the thrust structure and the gear.

[0005] Beneficial effects: The thrust structure and the gear are integrated on the camshaft to achieve an integrated design; when the camshaft assembly is installed in conjunction with the mounting seat, the predetermined spacing between the two corresponding surfaces of the thrust structure and the gear is adapted to the distance between the abutment surfaces on the opposite sides of the mounting seat to achieve the positioning and installation of the camshaft assembly, thereby achieving axial positioning of the camshaft assembly, ensuring that the cam part of the camshaft is accurately matched with the intake and exhaust rocker arm rollers, and further ensuring the normal operation of the engine.

[0006] In an optional embodiment, a circumferential surface of the optical axis portion corresponding to the installation position of the thrust structure is provided with a knurled pattern.

[0007] Beneficial effect: By providing the knurled pattern, the axial anti-slip force generated by the interference fit between the thrust structure and the camshaft is increased, the thrust structure is prevented from loosening and slipping in the axial direction, and reliable positioning of the thrust structure is ensured.

[0008] In an optional embodiment, the knurling pattern has a pattern direction arranged along the axial direction of the camshaft or along the circumferential direction of the camshaft.

[0009] Beneficial effect: It is convenient to process and form the knurling pattern on the camshaft.

[0010] In an optional implementation, the thrust structure is a circular ring structure.

[0011] In the second aspect, the utility model also provides a camshaft assembly mounting device, comprising the above-mentioned camshaft assembly and a mounting seat, wherein the mounting seat is connected to the camshaft and is located between the gear and the thrust structure, and the mounting seat has abutment surfaces on opposite sides, and the abutment surfaces located on opposite sides of the mounting seat respectively abut against two corresponding surfaces of the thrust structure and the gear.

[0012] Beneficial effect: The camshaft assembly is positioned and installed by using the mounting seat, which facilitates the installation and axial positioning of the camshaft assembly.

[0013] In an optional embodiment, the mounting seat includes an upper seat and a lower seat, the upper seat and the lower seat have a docking position to enclose a through space, the optical axis portion is inserted into the through space and adapted to the through space, and the upper seat and / or the lower seat form the abutment surface.

[0014] Beneficial effect: The mounting seat is arranged as an upper seat and a lower seat, which facilitates the assembly of the mounting seat and the camshaft.

[0015] In an optional embodiment, the two opposite side surfaces of the lower seat form the abutment surface, and the two opposite side surfaces of the upper seat are spaced apart from the two corresponding surfaces of the thrust structure and the gear; or, the two opposite side surfaces of the upper seat form the abutment surface, and the two opposite side surfaces of the lower seat are spaced apart from the two corresponding surfaces of the thrust structure and the gear; or, one side surface of the upper seat forms the abutment surface, and the other side surface of the lower seat forms the abutment surface; or, the two opposite side surfaces of the upper seat form the abutment surface, and the two opposite side surfaces of the lower seat also form the abutment surface.

[0016] In an optional embodiment, the upper seat and the lower seat are detachably connected; or, the upper seat and the lower seat are rotatably connected on one side of the through space and detachably connected on the other side of the through space.

[0017] In a third aspect, the utility model further provides an engine, comprising the above-mentioned camshaft assembly mounting device and an engine cylinder block, wherein the mounting seat is connected to the engine cylinder block.

[0018] In a fourth aspect, the utility model also provides an engineering equipment, comprising the above-mentioned engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of a camshaft assembly installation device according to an embodiment of the utility model;

[0021] Figure 2 for Figure 1 The schematic cross-sectional structure diagram of the camshaft assembly installation device along the axial direction is shown;

[0022] Figure 3 This is a schematic diagram of the structure of the knurling pattern along the axial direction of an embodiment of the utility model;

[0023] Figure 4 It is a schematic structural diagram of the knurling pattern along the circumferential direction of an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Camshaft; 11. Cam part; 12. Optical axis part; 13. Knurling pattern; 2. Gear; 3. Thrust structure; 4. Mounting seat; 41. Upper seat; 42. Lower seat; 43. Fasteners. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.

[0028] According to an embodiment of the utility model, on the one hand, a camshaft assembly is provided, comprising: a camshaft 1, a gear 2 and a thrust structure 3. The camshaft 1 has a cam portion 11 and a light shaft portion 12, and the gear 2 is interference fit with the shaft end of the light shaft portion 12 of the camshaft 1. The thrust structure 3 is interference fit with the light shaft portion 12 of the camshaft 1, and is spaced apart from the gear 2, and a predetermined spacing is provided between the two corresponding surfaces of the thrust structure 3 and the gear 2.

[0029] The thrust structure 3 and the gear 2 are integrated on the camshaft 1 to achieve an integrated design; when the camshaft assembly is installed in conjunction with the mounting seat 4, the predetermined spacing between the two corresponding surfaces of the thrust structure 3 and the gear 2 is adapted to the distance between the abutment surfaces on the opposite sides of the mounting seat 4 to achieve positioning and installation of the camshaft assembly, thereby achieving axial positioning of the camshaft assembly, ensuring that the cam portion 11 of the camshaft 1 is accurately matched with the intake and exhaust rocker arm rollers, and further ensuring the normal operation of the engine.

[0030] It is worth noting that in the related art, an annular groove is provided on the camshaft 1 to accommodate the thrust plate, so that the thrust plate is abutted against the engine cylinder block, and then a bolt is used to penetrate the thrust plate and is threadedly connected to the engine cylinder block to achieve the thrust positioning of the camshaft 1. The above scheme has a complex overall structure, and the thrust plate needs to be designed separately and installed on the engine cylinder block by additional bolts, which increases the number of parts required for the engine; and the position and size of the annular groove provided on the camshaft 1 need to be compatible with the thrust plate, and the dimensional chain involved is complex, and the parts corresponding to the reference datum are different. Therefore, the processing and installation positioning of the parts are required to be high, and there is a risk of the thrust plate getting stuck in the annular groove.

[0031] In this embodiment, the thrust structure 3 and the gear 2 that are interference fit with the camshaft 1 can realize the axial thrust positioning of the camshaft 1, and the structure is simple and reliable. The integrated design of the thrust structure 3, the gear 2 and the camshaft 1 can improve the efficiency of engine assembly and maintenance. In addition, the correct installation and matching of the camshaft assembly can be achieved by only ensuring that the predetermined spacing between the two corresponding surfaces of the thrust structure 3 and the gear 2 is matched with the distance between the abutment surfaces on the opposite sides of the mounting seat 4, and the dimension chain is simple and easy to process and manufacture.

[0032] Please note that Figure 2 The predetermined spacing is the distance between the left side surface of the gear 2 and the right side surface of the thrust structure 3 .

[0033] In one embodiment, Figure 3 and Figure 4As shown, the circumferential surface of the optical axis portion 12 corresponding to the installation position of the thrust structure 3 is provided with a knurled pattern 13. By providing the knurled pattern 13, the axial anti-slip force generated by the interference fit between the thrust structure 3 and the camshaft 1 is increased, the thrust structure 3 is prevented from loosening and slipping in the axial direction, and the thrust structure 3 is ensured to be reliably positioned.

[0034] In one embodiment, Figure 3 and Figure 4 As shown, the knurling pattern 13 is arranged in the axial direction of the camshaft 1 or in the circumferential direction of the camshaft 1. Thus, the knurling pattern 13 is conveniently processed and formed on the camshaft 1.

[0035] It is worth noting that the knurling direction of the knurling pattern 13 is the knurling processing direction of the knurling pattern 13 , that is, the knurling pattern 13 can be formed by knurling along the axial direction of the camshaft 1 , or by knurling along the circumferential direction of the camshaft 1 .

[0036] In one embodiment, Figure 1 As shown, the thrust structure 3 is a circular ring structure. That is, the thrust structure 3 is a thrust ring.

[0037] According to an embodiment of the utility model, on the other hand, a camshaft assembly installation device is also provided, comprising the above-mentioned camshaft assembly and a mounting seat 4, the mounting seat 4 is connected to the camshaft 1 and is located between the gear 2 and the thrust structure 3, and the mounting seat 4 has abutment surfaces on opposite sides, and the abutment surfaces located on opposite sides of the mounting seat 4 abut against two surfaces corresponding to each other of the thrust structure 3 and the gear 2. The mounting seat 4 is used to position and install the camshaft assembly, which facilitates the installation and axial positioning of the camshaft assembly.

[0038] It is worth mentioning that please refer to Figure 2 When the camshaft assembly is assembled with the mounting seat 4, the thrust structure 3 and the gear 2 are distributed on the left and right sides of the mounting seat 4. The left side of the mounting seat 4 has a left abutting surface, and the right side of the mounting seat 4 has a right abutting surface. The left abutting surface abuts against the right side surface of the thrust structure 3, and the right abutting surface abuts against the left side surface of the gear 2.

[0039] Please note that Figure 2 The predetermined distance between the left side surface of the gear 2 and the right side surface of the thrust structure 3 is t, and correspondingly, the distance between the left abutting surface and the right abutting surface of the mounting seat 4 is also t.

[0040] In one embodiment, Figure 1 and Figure 2As shown, the mounting seat 4 includes an upper seat 41 and a lower seat 42, the upper seat 41 and the lower seat 42 have a docking position to enclose a through space, the optical axis portion 12 is inserted into the through space and adapted to the through space, and an abutting surface is formed on the upper seat 41 and / or the lower seat 42. The mounting seat 4 is provided as the upper seat 41 and the lower seat 42, so as to facilitate the assembly of the mounting seat 4 and the camshaft 1.

[0041] It is worth noting that the optical axis portion 12 is adapted to the through space in that a side of the upper seat 41 for enclosing the through space and a side of the lower seat 42 for enclosing the through space are both in contact with the circumferential surface of the optical axis portion 12 .

[0042] Specifically, one side of the upper seat 41 facing the lower seat 42 is recessed to form an upper space, and one side of the lower seat 42 facing the upper seat 41 is recessed to form a lower space. When the upper seat 41 and the lower seat 42 are connected, the upper space and the lower space are combined to form a through space.

[0043] In one embodiment, Figure 2 As shown, the two opposite side surfaces of the lower seat 42 form abutment surfaces, and the two opposite side surfaces of the upper seat 41 are spaced apart from the two corresponding surfaces of the thrust structure 3 and the gear 2. That is, the left side and right side surfaces of the lower seat 42 abut against the right side surface of the thrust structure 3 and the left side surface of the gear 2, respectively, and the left side and right side surfaces of the upper seat 41 are spaced apart from the right side surface of the thrust structure 3 and the left side surface of the gear 2, respectively. This can ensure the thrust positioning of the camshaft 1 in the axial direction, and facilitate the matching installation of the upper seat 41 and the lower seat 42.

[0044] Of course, in other alternative embodiments, the two opposite side surfaces of the upper seat 41 form abutment surfaces, and the two opposite side surfaces of the lower seat 42 are spaced apart from the two corresponding surfaces of the thrust structure 3 and the gear 2; that is, the left side surface and the right side surface of the upper seat 41 abut against the right side surface of the thrust structure 3 and the left side surface of the gear 2, respectively, and the left side surface and the right side surface of the lower seat 42 are spaced apart from the right side surface of the thrust structure 3 and the left side surface of the gear 2, respectively. Alternatively, one side surface of the upper seat 41 forms an abutment surface, and the other side surface of the lower seat 42 forms an abutment surface; that is, one situation can be: the left side surface of the upper seat 41 and the right side surface of the lower seat 42 abut against the right side surface of the thrust structure 3 and the left side surface of the gear 2 respectively, and the right side surface of the upper seat 41 and the left side surface of the lower seat 42 are spaced apart from the right side surface of the thrust structure 3 and the left side surface of the gear 2 respectively; another situation can be: the left side surface of the lower seat 42 and the right side surface of the upper seat 41 abut against the right side surface of the thrust structure 3 and the left side surface of the gear 2 respectively, and the right side surface of the lower seat 42 and the left side surface of the upper seat 41 are spaced apart from the right side surface of the thrust structure 3 and the left side surface of the gear 2 respectively. Alternatively, the two opposite side surfaces of the upper seat 41 form abutment surfaces, and the two opposite side surfaces of the lower seat 42 also form abutment surfaces; that is, the left side and right side surfaces of the upper seat 41 respectively abut against the right side surface of the thrust structure 3 and the left side surface of the gear 2, and the left side and right side surfaces of the lower seat 42 also respectively abut against the right side surface of the thrust structure 3 and the left side surface of the gear 2.

[0045] In one embodiment, Figure 1 As shown, the upper seat 41 and the lower seat 42 are detachably connected. Specifically, the detachable connection between the upper seat 41 and the lower seat 42 is achieved by a fastener 43. Further, the fastener 43 can be a combination of a bolt and a nut.

[0046] Of course, in other alternative embodiments, the upper seat 41 and the lower seat 42 are rotatably connected on one side of the through space and detachably connected on the other side of the through space. Specifically, the upper seat 41 and the lower seat 42 are detachably connected on the other side of the through space by a fastener 43.

[0047] According to an embodiment of the present utility model, on another aspect, an engine is provided, comprising the above-mentioned camshaft assembly mounting device and an engine cylinder block, wherein the mounting seat 4 is connected to the engine cylinder block.

[0048] In one embodiment, the lower seat 42 of the mounting seat 4 is connected to the engine cylinder block.

[0049] When installing the camshaft assembly installation device of this embodiment, first, the lower seat 42 is installed on the engine cylinder block according to the predetermined position; then, the optical axis portion 12 between the thrust structure 3 and the gear 2 in the camshaft assembly is placed in the lower seat 42; finally, the upper seat 41 is installed on the lower seat 42, and the upper seat 41 and the lower seat 42 are fixed using the fastener 43. After the assembly is completed, the left side of the lower seat 42 abuts against the right side of the thrust structure 3, and the right side of the lower seat 42 abuts against the left side of the gear 2, so as to realize the axial thrust positioning of the camshaft 1.

[0050] According to an embodiment of the present utility model, in another aspect, there is provided an engineering equipment, comprising the above-mentioned engine.

[0051] It should be noted that engineering equipment may include operating vehicles such as heavy trucks, trailers, excavators, anchor diggers, bulldozers, road rollers and concrete pump trucks, or mechanical operating equipment such as tower cranes, construction elevators and material hoists.

[0052] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A camshaft assembly, characterized in that: include: A camshaft (1) comprising a cam portion (11) and an optical axis portion (12); The gear (2) is interference-fitted with the shaft end of the optical shaft portion (12) of the camshaft (1); The thrust structure (3) is interference-fitted with the optical axis portion (12) of the camshaft (1) and is spaced apart from the gear (2); a predetermined distance exists between two surfaces of the thrust structure (3) and the gear (2) that correspond to each other.

2. The camshaft assembly according to claim 1, characterized in that: A knurled pattern (13) is provided on the circumferential surface of the optical axis portion (12) corresponding to the installation position of the thrust structure (3).

3. The camshaft assembly according to claim 2, characterized in that: The knurled pattern (13) has a pattern direction arranged along the axial direction of the camshaft (1) or along the circumferential direction of the camshaft (1).

4. The camshaft assembly according to any one of claims 1 to 3, characterized in that: The thrust structure (3) is in the form of a circular ring.

5. A camshaft assembly mounting device, characterized in that: The invention comprises a camshaft assembly and a mounting seat (4) as claimed in any one of claims 1 to 4, wherein the mounting seat (4) is connected to the camshaft (1) and is located between the gear (2) and the thrust structure (3), and the mounting seat (4) has abutment surfaces on opposite sides, and the abutment surfaces located on opposite sides of the mounting seat (4) respectively abut against two corresponding surfaces of the thrust structure (3) and the gear (2).

6. The camshaft assembly mounting device according to claim 5, characterized in that: The mounting seat (4) comprises an upper seat (41) and a lower seat (42), wherein the upper seat (41) and the lower seat (42) have a docking position to enclose a through space, wherein the optical axis portion (12) is inserted into the through space and adapted to the through space, and the upper seat (41) and / or the lower seat (42) are formed with the abutment surface.

7. The camshaft assembly mounting device according to claim 6, characterized in that: The two opposite side surfaces of the lower seat (42) form the abutting surface, and the two opposite side surfaces of the upper seat (41) are spaced apart from the two corresponding surfaces of the thrust structure (3) and the gear (2); or, The two opposite side surfaces of the upper seat (41) form the abutting surface, and the two opposite side surfaces of the lower seat (42) are spaced apart from the two corresponding surfaces of the thrust structure (3) and the gear (2); or, One side surface of the upper seat (41) forms the abutting surface, and the other side surface of the lower seat (42) forms the abutting surface; or, The two opposite side surfaces of the upper seat (41) form the abutting surface, and the two opposite side surfaces of the lower seat (42) also form the abutting surface.

8. The camshaft assembly mounting device according to claim 6, characterized in that: The upper seat (41) and the lower seat (42) are detachably connected; or, The upper seat (41) and the lower seat (42) are rotatably connected on one side of the through space and detachably connected on the other side of the through space.

9. An engine, characterized in that: It comprises a camshaft assembly mounting device and an engine cylinder block as claimed in any one of claims 5 to 8, wherein the mounting seat (4) is connected to the engine cylinder block.

10. An engineering equipment, characterized in that: Comprising the engine as claimed in claim 9.

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