Gun drill machine tool for inner hole of automobile rocker arm shaft

Abstract

The utility model relates to the technical field of rocker arm shaft machining, and particularly discloses a gun drill machine tool for an inner hole of an automobile rocker arm shaft, which comprises a machine body, and a left positioning tool and a right positioning tool are symmetrically arranged at the left end and the right end in the machine body respectively. A left gun drill and a right gun drill which can slide left and right are symmetrically arranged in the machine body on the opposite end faces of the left positioning tool and the right positioning tool respectively, and auxiliary positioning tools are further arranged in the machine body on the opposite end faces of the left positioning tool and the right positioning tool. In the machining process, a gun drill opposite-direction drilling method is adopted, opposite-direction drilling is conducted from the two ends of the workpiece, the deep holes are connected in the middle of the part, and therefore the position degree of the deep hole openings is guaranteed, and machining efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rocker arm shaft processing, in particular to a gun drilling machine tool for inner holes of automobile rocker arm shafts. Background Art

[0002] Automobile rocker shafts are slender shaft parts, most of which are over 1000mm long. The inner holes that need to be processed on the workpiece are mostly eccentric holes, and the number varies from 2 to 3, all of which are through holes. The parts have very high requirements for the position of the hole, and the deviation must be within ≤0.05mm.

[0003] Traditionally, when machining the inner hole of a rocker shaft, deep hole machining is usually performed on one end of the rocker shaft on a gun drill machine. This way, the position of the deep hole entrance can be guaranteed. However, since the drilling depth is very deep, the deflection at the exit will be very large and the position cannot be guaranteed, affecting the machining accuracy requirements of the device. Utility Model Content

[0004] The technical problem to be solved by the utility model is that a deflection phenomenon will occur at the deep hole of the rocker arm shaft during the processing, resulting in a reduction in the processing accuracy and affecting the quality requirements for its use.

[0005] In order to solve the above problems, the technical solution of the utility model is: a gun drilling machine for the inner hole of an automobile rocker arm shaft, comprising a machine body, wherein a left positioning tool and a right positioning tool are symmetrically provided at the left and right ends of the machine body, and a left gun drill and a right gun drill that can slide left and right are symmetrically provided in the machine body at the opposite end faces of the left positioning tool and the right positioning tool, and an auxiliary positioning tool is also provided in the machine body at the opposite end faces.

[0006] Furthermore, the auxiliary positioning tooling includes a support seat and a clamping seat. Support seats are fixedly provided in the body at the opposite end faces of the left positioning tooling and the right positioning tooling, respectively. Arc grooves are respectively provided on the top surfaces of the two support seats, and a clamping seat that can be quickly connected is provided on the top surfaces of the support seats.

[0007] Furthermore, a notch is formed at one end of the clamping seat, a positioning bolt is fixedly provided on the top surface of the support seat corresponding to the notch, and a locking nut 1 matched therewith is also provided on the positioning bolt;

[0008] A cavity is provided in the support seat corresponding to the other end of the clamping seat, and a moving rod which can slide up and down and is fixedly connected to the bottom surface of the clamping seat is passed through the cavity. A groove is provided on the side surface of the support seat corresponding to the bottom of the cavity, and an external thread is provided on the outer side surface of the moving rod extending into the groove, and a locking nut 2 which is compatible with it is provided on the external thread.

[0009] Furthermore, a pressure plate is fixedly provided on the moving rod close to the bottom wall of the cavity, and a return spring is wound between the pressure plate and the top wall of the cavity.

[0010] Furthermore, a handle is fixedly provided on the top surface of the clamping seat.

[0011] The advantages of the utility model compared with the existing technology are:

[0012] 1. Through the cooperation of the left gun drill and the right gun drill which can slide left and right at both ends of the machine body, the device adopts the method of gun drill opposite drilling, drilling from both ends of the workpiece, and the deep holes are connected in the middle of the part, which not only ensures the position of the deep hole mouth, but also greatly improves the processing efficiency.

[0013] 2. The adjustable auxiliary positioning tooling can not only effectively position the rocker arm shaft during the drilling process, but also ensure the convenience of the positioning operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structure diagram of the utility model.

[0015] Figure 2 It is the internal structure diagram of the utility model.

[0016] Figure 3 It is a structural diagram of the auxiliary positioning tooling in the utility model.

[0017] Figure 4 It is an internal structure diagram of the support seat in the utility model.

[0018] As shown in the figure: 1. Machine body; 2. Left positioning tool; 3. Right positioning tool; 4. Machine cover; 5. Left gun drill; 6. Right gun drill; 7. Auxiliary positioning tool; 8. Support seat; 9. Arc groove; 10. Clamping seat; 11. Notch; 12. Positioning bolt; 13. Locking nut 1; 14. Cavity; 15. Moving rod; 16. Pressure plate; 17. Reset spring; 18. External thread; 19. Locking nut 2; 20. Groove; 21. Handle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] like Figure 1 to Figure 2As shown, the gun drilling machine for the inner hole of the automobile rocker arm shaft comprises a machine body 1, an openable machine cover 4 is provided on the end surface of the machine body 1, and a left positioning tool 2 and a right positioning tool 3 are symmetrically provided at the left and right ends of the machine body 1, and the rocker arm shaft is effectively positioned by the joint action of the left positioning tool 2 and the right positioning tool 3. The above structure belongs to the prior art features;

[0021] A left gun drill 5 and a right gun drill 6 which can slide left and right are symmetrically arranged in the machine body 1 at the opposite ends of the left positioning tool 2 and the right positioning tool 3, and an auxiliary positioning tool 7 is also arranged in the machine body 1 at the opposite end.

[0022] Through the above structure, in order to ensure the accuracy requirement of the hole opening position, the device adopts the method of gun drilling opposite drilling, drilling from both ends of the workpiece, and the deep holes are connected in the middle position of the part. This not only ensures the position of the deep hole opening, but also greatly improves the processing efficiency; under the action of the auxiliary positioning tooling 7, it can also ensure the stability of the drilling process.

[0023] like Figure 3 and Figure 4 As shown, the auxiliary positioning tool 7 includes a support seat 8 and a clamping seat 10. The support seats 8 are fixedly provided in the body 1 at the opposite end faces of the left positioning tool 2 and the right positioning tool 3. Arc grooves 9 are respectively provided on the top surfaces of the two support seats 8. A quickly connected clamping seat 10 is provided on the top surface of the support seat 8. With the cooperation of the clamping seat 10 and the support seat 8, effective auxiliary positioning operation is performed on the rocker arm shaft.

[0024] like Figure 3 As shown, a notch 11 is provided at one end of the clamping seat 10, and a positioning bolt 12 is fixedly provided on the top surface of the support seat 8 corresponding to the notch 11, and a locking nut 13 adapted thereto is also provided on the positioning bolt 12. Under the action of the positioning bolt 12 and the locking nut 13, one end of the clamping seat 10 is positioned;

[0025] like Figure 4 As shown, a cavity 14 is provided in the support seat 8 corresponding to the other end of the clamping seat 10, and a moving rod 15 which can slide up and down and is fixedly connected to the bottom surface of the clamping seat 10 is inserted into the cavity 14. A groove 20 is provided on the side surface of the support seat 8 corresponding to the bottom of the cavity 14, and an external thread 18 is provided on the outer side surface of the moving rod 15 extending into the groove 20. A locking nut 2 19 which is matched with the external thread 18 is provided on the external thread 18. Under the operation of the external thread 18 and the locking nut 2 19, the other end of the clamping seat 10 is positioned; loosen the locking nut 2 19 and the locking nut 1 13, pull the clamping seat 10 upward, and the clamping seat 10 can be rotated to the left to release its auxiliary positioning of the rocker shaft.

[0026] like Figure 4As shown, a pressure plate 16 is fixedly provided on the moving rod 15 near the bottom wall of the cavity 14, and a return spring 17 is wound between the pressure plate 16 and the top wall of the cavity 14. The cooperation between the pressure plate 16 and the return spring 17 can ensure the stability of the clamping seat 10 during the process of moving the rod up and down. A handle 21 is also fixedly provided on the top surface of the clamping seat 10.

[0027] In specific use, first put the rocker shaft into the two support seats 8, control the left positioning tooling 2 and the right positioning tooling 3 at both ends to position and adjust the two ends of the rocker shaft, after the positioning is completed, first pull the clamping seat 10 upwards, and then rotate it to the right to make the clamping seat 10 and the support seat 8 overlap, and then through the cooperation of the locking nut 13 and the positioning bolt 12 and the locking nut 2 19 and the external thread 18, the clamping seat 10 is effectively connected and positioned, so that the inner wall of the clamping seat 10 is tightly against the rocker shaft for auxiliary positioning;

[0028] Finally, the left gun drill 5 and the right gun drill 6 are used for counter-drilling from both ends of the workpiece, and the deep holes are connected in the middle of the part. This not only ensures the position of the deep hole mouth, but also greatly improves the processing efficiency, thereby improving the processing accuracy requirements of the device.

[0029] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A gun drilling machine for drilling the inner hole of an automobile rocker arm shaft, comprising a machine body (1), wherein a left positioning tool (2) and a right positioning tool (3) are symmetrically arranged at the left and right ends of the machine body (1), and the machine body (1) is characterized in that: A left gun drill (5) and a right gun drill (6) which can slide left and right are symmetrically arranged in the machine body (1) at the opposite end faces of the left positioning tool (2) and the right positioning tool (3), and an auxiliary positioning tool (7) is also arranged in the machine body (1) at the opposite end face.

2. The gun drilling machine for the inner hole of the automobile rocker arm shaft according to claim 1, characterized in that: The auxiliary positioning tool (7) comprises a support seat (8) and a clamping seat (10), and the support seats (8) are fixedly arranged in the body (1) at the opposite end faces of the left positioning tool (2) and the right positioning tool (3), respectively, and arc grooves (9) are respectively provided on the top surfaces of the two support seats (8), and a clamping seat (10) that can be quickly connected is provided on the top surface of the support seat (8).

3. The gun drilling machine for the inner hole of the automobile rocker shaft according to claim 2, characterized in that: A notch (11) is formed at one end of the clamping seat (10), a positioning bolt (12) is fixedly provided on the top surface of the support seat (8) corresponding to the notch (11), and a locking nut (13) matched therewith is also provided on the positioning bolt (12); A cavity (14) is provided in the support seat (8) corresponding to the other end of the clamping seat (10), and a moving rod (15) which can slide up and down and is fixedly connected to the bottom surface of the clamping seat (10) is inserted into the cavity (14). A groove (20) is provided on the side surface of the support seat (8) corresponding to the bottom of the cavity (14), and an external thread (18) is provided on the outer side surface of the moving rod (15) extending into the groove (20), and a locking nut (19) matched therewith is provided on the external thread (18).

4. The gun drilling machine for the inner hole of the automobile rocker shaft according to claim 3, characterized in that: A pressure plate (16) is fixedly arranged on the moving rod (15) close to the bottom wall of the cavity (14), and a return spring (17) is wound between the pressure plate (16) and the top wall of the cavity (14).

5. The gun drilling machine for the inner hole of the automobile rocker shaft according to claim 3 or 4, characterized in that: A handle (21) is also fixedly provided on the top surface of the clamping seat (10).

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