Camshaft gear hobbing positioning bolt

Abstract

The utility model relates to camshaft gear hobbing machining field, concretely is a kind of camshaft gear hobbing positioning bolt, including clamping tool, camshaft gear piece, third positioning hole being set up on camshaft gear piece, first threaded hole is set up on clamping tool, first threaded hole is connected with first screw rod in screw thread, second threaded hole is set up in first screw rod, the cooperation setting of first screw rod, positioning ring piece, second threaded rod, second screw block, positioning ring piece adapts the third positioning hole of gear, and through the accurate alignment of positioning pin and positioning hole, ensure that first screw rod, positioning ring piece and camshaft gear piece coaxial, second screw block can be received to the storage groove of positioning ring piece and abut inner wall simultaneously, form firm limit fixed, realize the multi-point position, surface contact positioning of camshaft gear piece, effectively avoid the displacement or loosening of gear in hobbing machining process, guarantee the stability of processing quality.

Description

Technical Field

[0001] This utility model relates to the field of camshaft gear hobbing technology, specifically to a camshaft gear hobbing positioning bolt. Background Technology

[0002] The camshaft is a component in a piston engine, and its function is to control the opening and closing of the valves. In the camshaft machining process, the existing machining method for the camshaft teeth involves using a clamping mechanism on a gear hobbing machine to hold and position the camshaft on its outer diameter. Then, a gear hobbing cutter is used to hob the fixed camshaft, and the rotation of the clamping mechanism simultaneously achieves a full-circle gear hobbing of the camshaft.

[0003] Chinese patent CN 214742848U discloses a camshaft hobbing tool and hobbing equipment. When machining camshaft teeth, it can work with the camshaft hobbing equipment to position the inner circles of the upper and lower ends of the camshaft, so that the two fixed points are on the same axis, ensuring the coaxiality of the camshaft teeth during the rotational machining process, thereby improving the machining accuracy of the camshaft teeth.

[0004] In the above scheme, although the camshaft gear is fixed by two positioning rods, when the gear is hobbing, the gear is easily loosened by only two fixed points, which will affect the processing quality.

[0005] Therefore, this utility model provides a camshaft gear hobbing positioning bolt to solve the above problems. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model provides a camshaft gear hobbing positioning bolt to solve the problem that when the gear is fixed by only two fixed points during gear hobbing, the gear is prone to loosening during the hobbing process, which in turn affects the processing quality.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A camshaft gear hobbing positioning bolt includes a clamping fixture, a camshaft gear component, and a third positioning hole on the camshaft gear component. The clamping fixture has a first threaded hole, and a first screw is threadedly connected to the first threaded hole. A second threaded rod is threadedly connected to the first screw, and a second screw block is fixedly connected to the second screw block. At least one positioning ring is provided between the first screw and the second screw block, and the first screw and the second screw block position the camshaft gear component through the positioning ring and the third positioning hole.

[0008] Preferably, a first screw block is fixedly connected to the first screw, and the first screw block forms a protrusion on the clamping fixture.

[0009] Preferably, the second screw block has a drive groove.

[0010] Preferably, the positioning ring includes an annular component with a through hole, and the annular component is sleeved on the second threaded rod through the through hole, and the annular component matches the third positioning hole.

[0011] Preferably, a second positioning hole is provided on one side of the annular component, and a positioning pin is fixedly connected to the other side of the annular component, and the positioning pin matches the second positioning hole. A first positioning hole matching the positioning pin is provided on the first screw block.

[0012] Preferably, the perforation has a storage groove, and the storage groove matches the second screw block.

[0013] The beneficial effects of this utility model are as follows: 1. Through the coordinated arrangement of the first screw, positioning ring, second threaded rod, and second screw block, the positioning ring is adapted to the third positioning hole of the gear, and the precise alignment of the positioning pin with the positioning hole ensures that the first screw, positioning ring, and camshaft gear are coaxial. At the same time, the second screw block can be stored in the storage groove of the positioning ring and abut against the inner wall to form a firm limiting fixation. This achieves multi-point and surface contact positioning of the camshaft gear, effectively avoiding gear displacement or loosening during gear hobbing and ensuring stable processing quality.

[0014] 2. By splicing together different numbers of positioning rings, a positioning structure matching the gear thickness can be formed. There is no need to design special tooling for gears of different sizes. This not only reduces the tooling investment cost in the production process, but also reduces the time loss of tooling replacement, and greatly improves the versatility and processing flexibility of the tooling. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation of the clamping fixture and the camshaft gear in this utility model.

[0016] Figure 2 This is a schematic diagram of the positioning ring component in this utility model being installed on the clamping fixture.

[0017] Figure 3 This is a schematic diagram showing the installation of the positioning ring on the first screw and the second screw block in this utility model.

[0018] Figure 4 The explosion of the positioning ring component in this utility model Figure 1 .

[0019] Figure 5The explosion of the positioning ring component in this utility model Figure 1 .

[0020] In the diagram: 1. Clamping fixture; 2. Camshaft gear; 3. First threaded hole; 4. First screw; 5. First screw block; 6. Second threaded hole; 7. First positioning hole; 8. Ring part; 9. Through hole; 10. Storage groove; 11. Second positioning hole; 12. Positioning pin; 13. Second threaded rod; 14. Second screw block; 15. Drive groove; 16. Third positioning hole. Detailed Implementation

[0021] The following will refer to the attached reference. Figures 1 to 5 The various embodiments of this utility model will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0022] A camshaft gear hobbing positioning bolt includes a clamping fixture 1, a camshaft gear component 2, and a third positioning hole 16 opened on the camshaft gear component 2. The clamping fixture 1 has a first threaded hole 3, and a first screw 4 is internally threaded into the first threaded hole 3. The first screw 4 is a rod-shaped structure with external threads on its outer surface, which can install the first screw 4 inside the first threaded hole 3 to complete the connection between the first screw 4 and the clamping fixture 1.

[0023] The first screw 4 has a second threaded hole 6, and a second threaded rod 13 is threadedly connected to the second threaded hole 6. The length of the second threaded rod 13 extending into the second threaded hole 6 can be adjusted by rotating the second threaded rod 13, thereby controlling the length of the second threaded rod 13 outside the second threaded hole 6. A second screw block 14 is fixedly connected to the second threaded rod 13, and the second screw block 14 forms a limiting stop on the second threaded rod 13. At least one positioning ring is provided between the first screw 4 and the second screw block 14, and the first screw 4 and the second screw block 14 are positioned for the camshaft gear 2 through the positioning ring and the third positioning hole 16.

[0024] In this embodiment, in order to position the camshaft gear component 2 with gears of different thicknesses, the number of positioning rings between the first screw 4 and the second screw block 14 can be adjusted. The positioning structure formed by splicing different numbers of positioning rings is positioned in the third positioning hole 16 to position the camshaft gear component 2.

[0025] The first screw 4 is fixedly connected to the first screw block 5, and the first screw block 5 forms a protrusion on the clamping fixture 1.

[0026] When disassembling or assembling the first screw 4, the first screw 4 can be rotated by placing the opening of the wrench inside the first screwing block 5. When the first screw 4 is fully installed inside the first threaded hole 3, the first screwing block 5 will be outside the clamping fixture 1, making it convenient to disassemble the first screw 4.

[0027] In this embodiment, a drive groove 15 is provided on the second screw block 14.

[0028] The drive slot 15 can be hexagonal, allowing an internal hex wrench that matches the drive slot 15 to be inserted into the drive slot 15 to rotate and adjust the second tightening block 14.

[0029] The drive slot 15 can be in the shape of a slot, allowing a flathead screwdriver that matches the drive slot 15 to be inserted into the drive slot 15 to rotate and adjust the second screw block 14.

[0030] The drive slot 15 can be cross-shaped, allowing a Phillips screwdriver that matches the drive slot 15 to be inserted into the drive slot 15 to rotate and adjust the second screw block 14.

[0031] In this embodiment, the positioning ring includes an annular part 8, which has a through hole 9 and is sleeved on the second threaded rod 13 through the through hole 9. The annular part 8 matches the third positioning hole 16.

[0032] The annular part 8 is circular, and the diameter of the annular part 8 is larger than that of the first screw block 5. The camshaft gear part 2 is positioned in the third positioning hole 16 by means of the annular part 8. When installed, the annular part 8 is located outside the second threaded rod 13 by means of the through hole 9.

[0033] To ensure that the annular part 8 and the first screw 4 are coaxial, a second positioning hole 11 is provided on one side of the annular part 8, and a positioning pin 12 is fixedly connected to the other side of the annular part 8, and the positioning pin 12 matches the second positioning hole 11. A first positioning hole 7 matching the positioning pin 12 is provided on the first screw block 5.

[0034] When the annular part 8 is outside the second threaded rod 13, the positioning pin 12 on the annular part 8 can be inserted into the first positioning hole 7 to complete the alignment of the annular part 8 and the first screw block 5. When adjacent annular parts 8 are spliced, the second positioning hole 11 and positioning pin 12 on the first and last annular parts 8 can be used to complete the positioning of the adjacent annular parts 8.

[0035] To facilitate the storage of the second screw block 14, a storage groove 10 is provided on the through hole 9, and the storage groove 10 matches the second screw block 14. When installing the second screw block 14, the second screw block 14 can be rotated and inserted into the storage groove 10, and the second screw block 14 is pressed against the inner wall of the storage groove 10 to fix the positioning ring.

[0036] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A camshaft gear hobbing positioning bolt, comprising a clamping fixture (1), a camshaft gear component (2), and a third positioning hole (16) formed on the camshaft gear component (2), characterized in that, The clamping fixture (1) has a first threaded hole (3), a first screw (4) is internally threaded in the first threaded hole (3), a second threaded hole (6) is internally threaded in the first screw (4), a second threaded rod (13) is internally threaded in the second threaded hole (6), a second screw block (14) is fixedly connected to the second screw block (13), at least one positioning ring is provided between the first screw (4) and the second screw block (14), and the first screw (4) and the second screw block (14) position the camshaft gear component (2) through the positioning ring and the third positioning hole (16).

2. The camshaft gear hobbing positioning bolt according to claim 1, characterized in that, The first screw (4) is fixedly connected to the first screw block (5), and the first screw block (5) forms a protrusion on the clamping fixture (1).

3. A camshaft gear hobbing positioning bolt according to claim 2, characterized in that, The second screw block (14) has a drive groove (15).

4. A camshaft gear hobbing positioning bolt according to claim 3, characterized in that, The positioning ring includes an annular part (8), which has a through hole (9) and is fitted onto the second threaded rod (13) through the through hole (9). The annular part (8) matches the third positioning hole (16).

5. A camshaft gear hobbing positioning bolt according to claim 4, characterized in that, The annular part (8) has a second positioning hole (11) on one side and a positioning pin (12) is fixedly connected to the other side of the annular part (8). The positioning pin (12) matches the second positioning hole (11), and the first screw block (5) has a first positioning hole (7) that matches the positioning pin (12).

6. A camshaft gear hobbing positioning bolt according to claim 4, characterized in that, The perforation (9) is provided with a storage groove (10), and the storage groove (10) matches the second screw block (14).

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