Chain wheel drilling tool with threaded hole of inclination angle

Abstract

The utility model relates to a chain wheel drilling frock with inclined angle threaded hole and relates to chain wheel machining technical field, including the base with the workstation fixed connection of vertical drilling machine, the vertical welding of baffle has in the base one end, and the welding of inclined base has between baffle and base, and the chain wheel fixing mechanism is equipped with on the inclined base, the inclination angle of the inclined base is a, and the angle between the axis of the threaded hole of the chain wheel to be processed and the chain wheel axis is b, the angle of a, b is same, the utility model discloses a chain wheel drilling frock with inclined angle threaded hole, solves the technical problem of no special frock when drilling the chain wheel with inclined angle threaded hole.

Description

Technical Field

[0001] This invention relates to the field of sprocket processing technology, specifically to a sprocket drilling tool with an inclined angle threaded hole. Background Technology

[0002] In sprocket manufacturing, sprockets are typically fixed to the shaft using a keyway and keyway. However, some sprockets are secured to the shaft using bolts. A more special case is as follows: Figure 5 , 6 As shown, the sprocket has inclined threaded holes on its sidewalls that penetrate the inner hole of the sprocket or the other sidewall. These threaded holes have a certain inclination angle and are used to fix the sprocket to the shaft after screwing in a locating bolt. Conventional tooling cannot be used when machining these inclined threaded holes. Therefore, it is necessary to develop a drilling tool for sprockets with inclined threaded holes. Utility Model Content

[0003] This invention discloses a sprocket drilling tool with an inclined angle threaded hole, which aims to solve the technical problem of not having a special tool when drilling sprockets with inclined angle threaded holes.

[0004] To achieve the above objectives, the technical solution of this invention is as follows:

[0005] A sprocket drilling fixture with an inclined threaded hole includes a base for fixed connection with the worktable of a vertical drilling machine. A baffle is vertically welded to one end of the base, and an inclined base is welded between the baffle and the base. A sprocket fixing mechanism is provided on the inclined base. The inclination angle of the inclined base is 'a', and the included angle between the axis of the inclined threaded hole of the sprocket to be processed and the axis of the sprocket is 'b'. The angles 'a' and 'b' are the same.

[0006] Preferably, the drilling tool is available in various models depending on the different inclination angles α.

[0007] Preferably, the sprocket fixing mechanism includes a sprocket positioning shaft coaxially and vertically fixed to the outer surface of the inclined base, and a sprocket positioning hole vertically formed on the outer surface of the inclined base where the outer periphery of the sprocket positioning shaft is located. The sprocket positioning hole is equipped with a positioning pin. A threaded rod is coaxially provided at the center of the sprocket positioning shaft, and the threaded rod is equipped with a locking nut.

[0008] Preferably, when the center hole of the sprocket to be processed is fitted onto the sprocket positioning shaft, it is fixedly connected to the sprocket positioning hole by a positioning pin that passes through a through hole coaxially provided on the sprocket to be processed.

[0009] Preferably, when the center hole of the sprocket to be processed is fitted onto the sprocket positioning shaft, it is fixedly connected to the sprocket positioning hole by a positioning pin passing through the tooth groove of the sprocket to be processed.

[0010] Preferably, a washer is fitted on the threaded rod, and after the locking nut is tightened, the sprocket to be processed is fixed axially by the washer.

[0011] The new type of sprocket drilling fixture with inclined threaded hole has the following advantages:

[0012] This new type of tool can be used for drilling sprockets with inclined threaded holes, solving the problem that conventional sprocket drilling tools are not applicable, reducing the processing difficulty, improving the construction efficiency, and ensuring the processing quality. Attached Figure Description

[0013] Figure 1 A side view of the main structure of this novel invention;

[0014] Figure 2 A front view of the inclined base, sprocket positioning shaft, and threaded rod of this novel invention.

[0015] Figure 3 Top view of this novel gasket;

[0016] Figure 4 A top view of the tilting base, sprocket positioning shaft, and threaded rod of this novel invention.

[0017] Figure 5 A front view of the sprocket to be processed;

[0018] Figure 6 A schematic diagram showing the sprocket to be processed being positioned against the shaft using positioning bolts;

[0019] Figure 7 A schematic diagram of the overall assembly structure of this novel invention.

[0020] The markings in the diagram are: 1. Base; 2. Baffle; 3. Inclined base; 4. Sprocket positioning shaft; 5. Threaded rod; 6. Positioning pin; 7. Washer; 8. Sprocket to be processed; 9. Through hole; 10. Inclined threaded hole; 11. Sprocket shaft; 12. Positioning bolt; 13. First angle a; 14. Axis of the inclined threaded hole; 15. Sprocket axis; 16. Second angle b; 17. Third angle c; 18. Locking nut; 19. Washer cross-section. Detailed Implementation

[0021] The following is a detailed description of the embodiments of the present invention in a step-by-step manner. This description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this invention.

[0023] Example 1

[0024] A sprocket drilling fixture with an angled threaded hole, such as Figure 1-4 As shown, it includes a base 1 for fixed connection with the worktable of a vertical drilling machine. A baffle 2 is vertically welded to one end of the base 1. An inclined base 3 is welded between the baffle 2 and the base 1. A sprocket fixing mechanism is provided on the inclined base 3. The inclination angle of the inclined base 3 is a. The included angle between the axis of the inclined threaded hole 10 of the sprocket 8 to be processed and the axis of the sprocket is b. The angles a and b are the same.

[0025] like Figure 1 As shown, the sprocket fixing mechanism is used to fix the sprocket to be processed, preventing it from rotating or moving axially, thus ensuring drilling accuracy. Based on mathematical calculations, since angles a and b are the same, after fixing the sprocket, the vertical drilling machine can drill the inclined threaded hole vertically with the selected drill bit.

[0026] Example 2

[0027] Furthermore, such as Figure 7 As shown, the drilling fixture is available in various models depending on the different inclination angles α. Each model is designed for threaded holes with different inclination angles.

[0028] Example 3

[0029] Furthermore, such as Figure 1-7 As shown, the sprocket fixing mechanism includes a sprocket positioning shaft 4 coaxially and vertically fixed to the outer surface of the inclined base 3, and a sprocket positioning hole on the outer surface of the inclined base 3 where the outer periphery of the sprocket positioning shaft 4 is located vertically. The sprocket positioning hole is equipped with a positioning pin 6. A threaded rod 5 is coaxially provided at the center of the sprocket positioning shaft 4, and a locking nut 18 is provided on the threaded rod 5.

[0030] Furthermore, when the center hole of the sprocket 8 to be processed is fitted onto the sprocket positioning shaft 4, it is fixedly connected to the sprocket positioning hole by a positioning pin 6 that passes through the through hole 9 coaxially provided on the sprocket 8 to be processed.

[0031] like Figure 7As shown, when the sprocket 8 to be processed is fixed, the center hole is fitted onto the sprocket positioning shaft 4 to prevent it from moving radially. Then, the positioning pin 6 is passed through the through hole 9 and inserted into the sprocket positioning hole to further prevent the sprocket from rotating. Then, by tightening the locking nut 18 on the threaded rod, the locking nut 18 is pressed against the sprocket to be processed to prevent it from moving axially. At this point, the fixing of the sprocket to be processed is completed. At this time, the drill bit of the vertical drilling machine is vertically aligned with the position of the hole to be drilled, and then the vertical drilling machine can be started to drill.

[0032] Example 4

[0033] Unlike Embodiment 3, in this embodiment, when the center hole of the sprocket 8 to be processed is fitted onto the sprocket positioning shaft 4, it is fixedly connected to the sprocket positioning hole by a positioning pin 6 passing through the tooth groove of the sprocket 8 to be processed (not shown in the figure). The purpose is also to prevent the sprocket to be processed from rotating.

[0034] Example 5

[0035] like Figure 3 , 7 As shown, a washer 7 is fitted on the threaded rod 5. After the locking nut 18 is tightened, the sprocket 8 to be processed is fixed axially by the washer 7. The function of the washer is to prevent the locking nut from loosening.

[0036] The working principle of this new type:

[0037] like Figure 7 As shown, when the sprocket to be processed is fixed on the inclined base, its inclination is the same as that of the inclined base, that is, the first angle a13. Since the trajectory of the drill bit is perpendicular to the base 1 and the axis of the sprocket is perpendicular to the inclined base, the second angle b16 between the axis 14 of the inclined threaded hole of the sprocket 8 and the axis 15 of the sprocket is 90° minus the third angle c17, which is the same as the first angle a13. After the sprocket to be processed is fixed, the hole drilled by the vertically downward drill bit is the threaded hole with the required inclination angle.

Claims

1. A sprocket drilling fixture with an inclined threaded hole, characterized in that: The system includes a base for fixed connection with the worktable of a vertical drilling machine. A baffle is vertically welded to one end of the base, and an inclined base is welded between the baffle and the base. A sprocket fixing mechanism is provided on the inclined base. The inclination angle of the inclined base is 'a', and the included angle between the axis of the inclined threaded hole of the sprocket to be processed and the axis of the sprocket is 'b'. The angles 'a' and 'b' are the same.

2. The sprocket drilling fixture with an inclined threaded hole as described in claim 1, characterized in that: The drilling fixture is available in various models depending on the different inclination angles α.

3. The sprocket drilling fixture with an inclined threaded hole as described in claim 2, characterized in that: The sprocket fixing mechanism includes a sprocket positioning shaft coaxially and vertically fixed to the outer surface of the inclined base, and a sprocket positioning hole vertically formed on the outer surface of the inclined base where the outer periphery of the sprocket positioning shaft is located. The sprocket positioning hole is equipped with a positioning pin. A threaded rod is coaxially provided at the center of the sprocket positioning shaft, and the threaded rod is equipped with a locking nut.

4. The sprocket drilling fixture with an inclined threaded hole as described in claim 3, characterized in that: When the center hole of the sprocket to be processed is fitted onto the sprocket positioning shaft, it is fixedly connected to the sprocket positioning hole by a positioning pin that passes through a through hole coaxially provided on the sprocket to be processed.

5. The sprocket drilling fixture with an inclined threaded hole as described in claim 3, characterized in that: When the center hole of the sprocket to be processed is fitted onto the sprocket positioning shaft, it is fixedly connected to the sprocket positioning hole by a positioning pin passing through the tooth groove of the sprocket to be processed.

6. A sprocket drilling fixture with an inclined threaded hole as described in claim 4 or 5, characterized in that: A washer is fitted on the threaded rod, and after the locking nut is tightened, the sprocket to be processed is fixed axially by means of the washer.

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