Fixture for valve rocker drilling

Abstract

The utility model relates to the technical field of valve rocker arms, and particularly discloses a valve rocker arm drilling clamp which comprises a base, a sliding plate, a rotating plate and a positioning column, the sliding plate is slidably connected to the base in the length direction of the base, and a locking piece used for locking the sliding plate is arranged on the sliding plate; the rotating plate is rotationally connected to the sliding plate in the width direction of the base, and an adjusting mechanism used for adjusting the rotating angle of the rotating plate is arranged on the sliding plate. The positioning column is vertically inserted into the rotating plate, and a fixing mechanism for fixing the valve rocker is arranged on the positioning column. The inclined oil hole drilling device has the effect that the problem that when drilling operation of different included angles of inclined oil holes needs to be achieved, a plurality of clamping tools need to be arranged in a matched mode, and the manufacturing cost of the clamping tools is increased is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of valve rocker arms, in particular to a clamp for drilling a valve rocker arm. BACKGROUND

[0002] A valve rocker arm is a transmission part between a push rod and a valve, and the main function of the valve rocker arm is to change the movement and force from the push rod and the cam and transmit the movement and force to the valve, so that the valve can be normally opened. The valve rocker arm is one of the most important parts of an engine, and the machining quality of the valve rocker arm has a decisive influence on the use effect of the engine.

[0003] A bevel oil hole needs to be formed on the inner wall of a center hole of the valve rocker arm during machining. The drill bit of a conventional vertical drilling machine is vertically fed, and therefore it is inconvenient to machine the bevel oil hole. A clamping tool is provided in the related art, which comprises a base, an inclined plate, a positioning shaft and a fixing assembly. The inclined plate is fixedly installed on the base at a certain angle, the positioning shaft is fixedly arranged on the inclined plate, and the fixing assembly is arranged on the inclined plate and used for fixing the valve rocker arm. After the center hole of the valve rocker arm is sleeved on the positioning shaft, the valve rocker arm is fixed by the fixing assembly, and the machining of the bevel oil hole of the center hole of the valve rocker arm can be realized.

[0004] For the related art in the above, the tooling can realize the drilling of the bevel oil hole with a specific angle, but when the drilling of the bevel oil hole with different angles needs to be realized, a plurality of clamping tools need to be matched and arranged, and the manufacturing cost of the clamping tool is increased. CONTENT OF THE INVENTION

[0005] In order to improve the problem that a plurality of clamping tools need to be matched and arranged when the drilling of the bevel oil hole with different angles needs to be realized, and the manufacturing cost of the clamping tool is increased, the application provides a clamp for drilling a valve rocker arm.

[0006] The clamp for drilling a valve rocker arm provided by the application adopts the following technical scheme:

[0007] The clamp for drilling a valve rocker arm comprises a base, a sliding plate, a rotating plate and a positioning column. The sliding plate is slidably connected to the base along the length direction of the base. The sliding plate is provided with a locking piece for locking the sliding plate. The rotating plate is rotatably connected to the sliding plate along the width direction of the base. The sliding plate is provided with an adjusting mechanism for adjusting the rotation angle of the rotating plate. The positioning column is vertically inserted into the rotating plate. The positioning column is provided with a fixing mechanism for fixing the valve rocker arm.

[0008] By adopting the technical scheme, the positioning column is vertically arranged on the rotating plate, the valve rocker arm is firmly clamped by the fixing mechanism, and displacement during machining is prevented; then, according to the requirement of the drilling angle of the inclined oil hole, the angle of the rotating plate is adjusted by the adjusting mechanism, so that the valve rocker arm fixed on the rotating plate can be in an inclined state suitable for drilling, and the adaptability is stronger, and the problem that when different drilling angles of the inclined oil hole need to be realized, multiple clamping tools need to be matched and set, and the manufacturing cost of the clamping tool is increased is improved. The sliding plate can move along the length direction of the base and be fixed in position by the locking member, so that the valve rocker arm can be moved to a position suitable for machining, and the flexibility and accuracy of the drilling operation are improved.

[0009] Optionally, the adjusting mechanism comprises a sliding block, a lead screw, a rotary motor and a connecting rod, the sliding block is slidably connected to the sliding plate along the length direction of the base, the lead screw is rotatably connected to the sliding plate along the length direction of the base, and the lead screw is threadedly connected to the sliding block; one end of the connecting rod is hingedly connected to the sliding block, and the other end of the connecting rod is hingedly connected to the rotating plate; the rotary motor is arranged on the sliding plate, and the rotary shaft of the rotary motor is connected to the lead screw.

[0010] By adopting the technical scheme, the sliding block is slidably connected to the sliding plate along the length direction of the base, the lead screw is rotatably connected to the sliding plate along the length direction of the base and is threadedly connected to the sliding block, so that the rotary motor can drive the lead screw to rotate and drive the sliding block to accurately move along the length direction of the base. The connecting rod is hingedly connected to the sliding block and the rotating plate at both ends, and when the sliding block moves, the rotating plate can be pushed or pulled to rotate around the width direction of the base through the connecting rod, so as to accurately adjust the angle of the rotating plate. This design avoids the inconvenience and error caused by manual adjustment, improves the operation efficiency and accuracy of the clamp, simplifies the structure complexity and enhances the stability.

[0011] Optionally, the fixing mechanism comprises an arc-shaped abutting block, a moving rod and a driving assembly, an installation through hole is coaxially arranged on the positioning column, the moving rod is movably inserted into the positioning column along the radial direction of the positioning column, a plurality of moving rods are uniformly distributed around the axis of the positioning column, and the arc-shaped abutting block is connected to one end of each moving rod that penetrates through the positioning column; the driving assembly is arranged on the positioning column, and the driving assembly is used for synchronously driving each moving rod to move away from the positioning column.

[0012] By adopting the technical scheme, reliable fixation of the valve rocker arm can be realized; specifically, the arc-shaped abutting block is designed to fit the inner wall profile of the center hole of the valve rocker arm, thereby improving the contact area and stability; the moving rods are uniformly arranged around the axis of the positioning column, thereby ensuring uniform force distribution and avoiding local excessive force that causes deformation of the workpiece; the driving assembly synchronously drives each moving rod to move away from the positioning column, so that the clamping process is more accurate and efficient, thereby improving the accuracy and safety during drilling.

[0013] Optionally, the driving assembly comprises a rotating rod and a rotating cylinder, the rotating rod is movably inserted into the mounting through hole, an outer thread is arranged on the circumferential wall of the rotating rod, a clamping groove is arranged on the circumferential wall of the rotating rod along the length direction of the rotating rod, a clamping block is fixedly connected to the inner wall of the positioning column, and the clamping block is slidably arranged in the clamping groove; the rotating cylinder is rotationally connected to the positioning column around the axis of the positioning column, the rotating rod is arranged through the rotating cylinder and is threadedly connected with the rotating cylinder; and a bevel is arranged on one end of the mobile rod inserted into the mounting through hole of the positioning column, and the one end of the rotating rod inserted into the mounting through hole abuts against the bevel.

[0014] By adopting the above technical scheme, the rotating cylinder is rotated, and the rotating rod is pushed to move along the axis of the positioning column under the action of the thread. Since the clamping groove on the rotating rod cooperates with the clamping block in the positioning column, the rotating rod can keep stable linear motion without self-rotation. With the advancement of the rotating rod, the end thereof will abut against and press the bevel at one end of each mobile rod inserted into the inside of the positioning column, so as to drive the mobile rods to slide radially outward along the positioning column, so that all the arc-shaped abutting blocks connected to the extended end of the mobile rod will be expanded and abut against the inner wall of the central hole of the valve rocker arm synchronously, thereby realizing effective clamping of the valve rocker arm. This design not only ensures high consistency of the action of each mobile rod, but also ensures smooth and reliable process, greatly improving the workpiece clamping efficiency and precision.

[0015] Optionally, an anti-skid line is arranged on the circumferential wall of the arc-shaped abutting block.

[0016] By adopting the above technical scheme, the anti-skid line on the circumferential wall of the arc-shaped abutting block can increase the friction between the arc-shaped abutting block and the valve rocker arm, thereby improving the stability during fixing and effectively preventing the valve rocker arm from relatively sliding or displacing during the machining process.

[0017] Optionally, the positioning column is rotationally connected to the rotating plate around the axis thereof, a worm wheel is coaxially connected to the positioning column, a worm is rotationally connected to the rotating plate, the worm is engaged with the worm wheel, and a rotating disc is arranged on the worm.

[0018] By adopting the above technical scheme, the angle adjustment function of the positioning column relative to the rotating plate is realized; specifically, the cooperation of the worm wheel and the worm enables the operator to accurately control the rotation angle of the positioning column by manually rotating the rotating disc on the worm, thereby adapting to the requirements of different drilling positions; this design improves the flexibility and applicability of the clamp, simplifies the operation process, and improves the work efficiency.

[0019] Optionally, a rotating gear is rotationally connected to the bottom of the sliding plate around the width direction of the base, a rack is arranged on the base, and the rotating gear is engaged with the rack; the locking member comprises a locking bolt, the locking bolt is threadedly connected to the sliding plate, and the threaded end of the bolt thread is used for abutting against the side wall of the base.

[0020] By adopting the technical scheme, when the position of the sliding plate needs to be adjusted, the precise displacement of the sliding plate can be realized through the meshing action between the gear and the rack; after the position adjustment is completed, the locking bolt is tightened, and the threaded end thereof tightly abuts against the side wall of the base, so that the accidental sliding of the sliding plate is effectively prevented, and the stability of the overall structure of the clamp is ensured. This design not only improves the operation convenience, but also ensures the accuracy of the positioning of the valve rocker arm in the machining process.

[0021] To sum up, the present application has at least one of the following beneficial technical effects:

[0022] 1. The positioning column and the fixing mechanism are arranged to enable the valve rocker arm to be accurately positioned and fixed, and the rotating plate is arranged to rotate around the width direction of the base to cooperate with the adjusting mechanism, so that the valve rocker arm can be adaptively adjusted in angle, thereby adapting to the drilling operation of the inclined oil hole at different angles, and the problem that multiple clamping tools need to be arranged to realize the drilling operation of the inclined oil hole at different angles is solved, and the manufacturing cost of the clamping tools is reduced.

[0023] 2. The sliding block, the lead screw, the rotary motor and the connecting rod are arranged in cooperation, so that the rotary motor drives the lead screw to rotate, and the sliding block is driven to move, and the rotating plate is driven to overturn under the driving of the connecting rod, the angle of the rotating plate is accurately adjusted, the inconvenience and errors caused by manual adjustment are avoided, and the operation efficiency and precision of the clamp are improved.

[0024] 3. The worm and the worm wheel are arranged, and the angle of the positioning column relative to the rotating plate is adjusted, so that the requirements of different drilling positions of the valve rocker arm are met. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0027] Figure 2 is a schematic diagram of the cross-sectional structure of the embodiment of the present application;

[0028] Figure 3 is Figure 2 the local enlarged schematic diagram of part A in

[0029] Mark No. : 1, base; 11, sliding clamping groove; 12, rack; 2, sliding plate; 21, clamping block; 22, locking piece; 23, sliding block; 24, screw rod; 25, rotary motor; 26, connecting rod; 27, moving groove; 28, rotating gear; 3, rotating plate; 31, rotating through hole; 32, worm; 33, worm wheel; 34, rotating disc; 4, positioning column; 41, arc-shaped pressing block; 411, anti-skid line; 42, moving rod; 421, inclined surface; 43, mounting through hole; 44, rotating rod; 441, sliding groove; 45, rotating cylinder; 46, clamping block. DETAILED DESCRIPTION

[0030] The following will be described in detail in combination with the accompanying drawings. Figures 1-3 The application is further described in detail.

[0031] The application discloses a valve rocker arm drilling clamp. Referring to Figure 1 The valve rocker arm drilling clamp comprises a base 1, a sliding plate 2, a rotating plate 3 and a positioning column 4. The base 1 is provided with sliding clamping grooves 11 on both side walls in the width direction of the base 1 along the length direction of the base 1. The sliding plate 2 is provided with clamping blocks 21 on both sides in the width direction of the sliding plate 2. Each clamping block 21 is arranged in the sliding clamping groove 11 correspondingly, so that the sliding plate 2 is slidably connected to the base 1 along the length direction of the base 1. The sliding plate 2 is provided with a locking piece 22 for locking the sliding plate 2. In the application, the locking piece 22 is a locking bolt. The locking bolt is threadedly connected to the clamping block 21 in the width direction of the base 1. The threaded end of the locking bolt can be screwed into the sliding clamping groove 11. The sliding plate 2 is fixed by screwing the locking bolt and making the threaded end of the locking bolt abut against the inner wall of the sliding clamping groove 11.

[0032] Referring to Figures 1-2 The bottom end of the rotating plate 3 is rotatably connected to the sliding plate 2 in the width direction of the base 1 and is provided with an adjusting mechanism for adjusting the angle of the rotating plate 3. The upper surface of the rotating plate 3 is vertically provided with a rotating through hole 31. The positioning column 4 is inserted into the rotating through hole 31 and is rotatably connected to the rotating through hole 31 through a bearing along the axis of the positioning column 4. The rotating plate 3 is provided with a rotating assembly for driving the positioning column 4 to rotate. The positioning column 4 is provided with a fixing mechanism for fixing the valve rocker arm.

[0033] In use, the valve rocker arm is fixed on the positioning column 4 through the fixing mechanism to prevent displacement of the valve rocker arm during drilling; then, the angle of the rotating plate 3 is adjusted through the adjusting mechanism according to the angle of the inclined oil hole formed on the inner wall of the center hole of the valve rocker arm, so that the valve rocker arm can adapt to the drilling operation of inclined oil holes with different angles, and the problem of increasing the manufacturing cost of the clamping tool when multiple clamping tools need to be matched to realize the drilling operation of inclined oil holes with different angles is improved. At the same time, the sliding plate 2 can move along the length direction of the base 1 and be fixed in position through the locking piece 22, so that the valve rocker arm can be moved to a suitable position for processing, and the flexibility and accuracy of the drilling operation are improved. And the positioning column 4 is rotatably connected to the rotating plate 3 to cooperate with the setting of the rotating assembly, so that the valve rocker arm can rotate with the positioning column 4, thereby enabling drilling operation on different parts of the inner wall of the center hole of the valve rocker arm, and improving the practicability of the clamp.

[0034] For example, with reference to Figure 3 The fixing mechanism includes an arc-shaped pressing block 41, a moving rod 42 and a driving assembly. The positioning column 4 is coaxially provided with an installation through hole 43, and the moving rod 42 is movably inserted into the positioning column 4 and inserted into the installation through hole 43. The moving rod 42 is uniformly distributed around the axis of the positioning column 4, and in this application, the moving rod 42 is specifically provided with two groups. The arc-shaped pressing block 41 is welded and fixed to one end of each moving rod 42 that penetrates the positioning column 4, and the outer peripheral wall of the arc-shaped pressing block 41 is provided with anti-slip lines 411. The driving assembly is arranged on the positioning column 4, and the driving assembly is used to synchronously drive each moving rod 42 to move away from the positioning column 4.

[0035] When fixing the valve rocker arm, the valve rocker arm is first sleeved on the positioning column 4 through the center hole, and then the driving assembly is used to synchronously drive each moving rod 42 to move away from the positioning column 4, so that the outer peripheral wall of each arc-shaped pressing block 41 is tightly pressed against the inner wall of the center hole of the valve rocker arm, thereby achieving the fixation of the valve rocker arm. The fixing structure is relatively simple in whole, compact in structure and convenient to use.

[0036] Further, the driving assembly includes a rotating rod 44 and a rotating cylinder 45, the rotating rod 44 is provided with external threads on the peripheral wall, and the rotating rod 44 is movably inserted into the installation through hole 43, the rotating rod 44 is provided with a sliding groove 441 on the peripheral wall along the length direction thereof, and the positioning column 4 is fixedly connected with a clamping block 46 on the inner wall, and the clamping block 46 is slidably clamped in the sliding groove 441. The rotating cylinder 45 is rotatably connected to the positioning column 4 around the axis of the positioning column 4, and the rotating rod 44 is inserted into the rotating cylinder 45 and threadedly connected with the rotating cylinder 45. One end of the moving rod 42 inserted into the installation through hole 43 of the positioning column 4 is provided with an inclined surface 421, and the inclined surface 421 is arranged towards the rotating rod 44.

[0037] When the rotating cylinder 45 rotates, the rotating rod 44 moves along its length. When the rotating rod 44 presses against the inclined surface 421 of the moving rod 42, it drives the moving rod 42 to slide radially outward along the positioning column 4 under the action of force decomposition, so that all the arc-shaped abutting blocks 41 connected to the extending end of the moving rod 42 expand synchronously and abut against the inner wall of the center hole of the valve rocker, achieving effective clamping of the valve rocker. The cooperation of the rotating rod 44 and the rotating cylinder 45 achieves the functional requirement of synchronously driving each moving rod 42 to move towards the direction of disengaging from the positioning column 4, and the whole process is stable and reliable, greatly improving the workpiece clamping efficiency and precision.

[0038] Further, referring to Figure 1 , the rotating assembly includes a worm 32 and a worm gear 33. The worm gear 33 is coaxially connected to the positioning column 4, and the worm 32 is rotatably connected to the rotating plate 3. The worm 32 and the worm gear 33 are in meshing engagement, and one end of the worm 32 is coaxially connected to a rotating disc 34. The cooperation of the worm gear 33 and the worm 32 enables the operator to accurately control the rotation angle of the positioning column 4 by manually rotating the rotating disc 34 on the worm 32. Moreover, due to the self-locking property of the worm gear 33 and the worm 32, the worm gear 33 is locked when the rotating disc 34 is not rotated, thereby locking the positioning column 4, which improves the machining precision.

[0039] Specifically, referring to Figures 1-2 , the adjusting mechanism is composed of a sliding block 23, a lead screw 24, a rotary motor 25, and a connecting rod 26. A moving groove 27 is formed in the middle of the sliding plate 2 along its length, and the sliding block 23 is slidingly fitted in the moving groove 27. The lead screw 24 is rotatably connected to the sliding plate 2 along the length direction of the base 1, and the lead screw 24 is threaded through the sliding block 23 and is in threaded connection with the sliding block 23. One end of the connecting rod 26 is rotatably connected to the sliding block 23, and the other end of the connecting rod 26 is rotatably connected to the rotating plate 3. The rotary motor 25 is fixedly attached to the sliding plate 2, and the rotating shaft of the rotary motor 25 is coaxially connected to the lead screw 24.

[0040] By driving the lead screw 24 to rotate through the rotary motor 25, the sliding block 23 can be accurately moved along the length direction of the base 1, thereby driving the connecting rod 26 to swing up and down, and driving the rotating plate 3 to rotate around the width direction of the base 1, achieving accurate adjustment of the angle of the rotating plate 3. The cooperative action of the components in the adjusting mechanism avoids the inconvenience and errors caused by manual adjustment, and improves the operation efficiency and precision of the clamp.

[0041] In addition, a rotating gear 28 is rotatably connected to the bottom of the sliding plate 2 around the width direction of the base 1, and a rack 12 is provided on the base 1 along its length. The rotating gear 28 is in meshing engagement with the rack 12. The cooperation of the rotating gear 28 and the rack 12 makes the sliding of the sliding plate 2 relative to the base 1 more stable and reliable.

[0042] The implementation principle of the valve rocker arm drilling clamp is as follows: in use, the valve rocker arm is sleeved on the positioning column 4 through the center hole, then the rotating cylinder 45 is rotated to drive the rotating rod 44 to move towards the inclined surface 421 of the moving rod 42, when the rotating rod 44 abuts against the inclined surface 421, the moving rod 42 is driven to move towards the direction of being separated from the positioning column 4 under the action of force decomposition, so that the arc-shaped abutting block 41 connected to the extending end of the moving rod 42 abuts against the inner wall of the center hole of the valve rocker arm, and effective clamping of the valve rocker arm is realized. Then, the turntable 34 is appropriately rotated according to the position of the inclined oil hole required to be drilled on the inner wall of the center hole of the valve rocker arm, the worm wheel 33 is driven to rotate, and the valve rocker arm is driven to rotate around the center hole axis. Then, the angle of the rotating plate 3 is adjusted by the adjusting mechanism according to the drilling angle of the inclined oil hole of the valve rocker arm. Finally, the position of the sliding plate 2 is adjusted according to the position of the drill bit of the drilling machine, so that the drilling point of the valve rocker arm is located directly below the drill bit, and the drilling operation of the inclined oil hole of the valve rocker arm at different angles is completed by the drilling machine. The design of the clamp can be applied to the drilling operation of the inclined oil hole of the valve rocker arm at different angles, and the problem that multiple clamping tools need to be matched and set when the drilling operation of the inclined oil hole at different angles is required to be realized is improved, and the manufacturing cost of the clamping tool is increased.

[0043] The above are optional embodiments of the present application, and do not limit the protection scope of the present application, therefore: equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A valve rocker arm drilling jig characterized by: The utility model provides a kind of valve rocker arm positioning device, including base (1), sliding plate (2), rotating plate (3) and positioning column (4), the sliding plate (2) is slidably connected on base (1) along the length direction of base (1), the sliding plate (2) is equipped with locking piece (22) for locking sliding plate (2);The rotating plate (3) is rotatably connected on sliding plate (2) around the width direction of base (1), the sliding plate (2) is equipped with adjusting mechanism for adjusting rotating plate (3) rotating plate (3) rotating angle;The positioning column (4) is vertically inserted in rotating plate (3), and the positioning column (4) is equipped with fixing mechanism for fixing valve rocker arm.

2. The rocker arm drilling jig according to claim 1, wherein: The adjusting mechanism includes sliding block (23), screw rod (24), rotary motor (25) and connecting rod (26), the sliding block (23) is slidably connected on sliding plate (2) along the length direction of base (1), the screw rod (24) is rotatably connected on sliding plate (2) around the length direction of base (1), the screw rod (24) is inserted in sliding block (23) and is threadedly connected with sliding block (23);The connecting rod (26) is hingedly connected with sliding block (23) at one end, and the other end of the connecting rod (26) is hingedly connected with rotating plate (3);The rotary motor (25) is arranged on the sliding plate (2), and the rotary shaft of the rotary motor (25) is connected with the screw rod (24).

3. The rocker arm drilling jig according to claim 1, wherein: The fixing mechanism includes arc-shaped abutting block (41), moving rod (42) and drive assembly, coaxially arranged mounting through hole (43) is formed in the positioning column (4), the moving rod (42) is movably inserted into the positioning column (4) along the radial direction of the positioning column (4), a plurality of moving rods (42) are uniformly distributed around the axis of the positioning column (4), and the arc-shaped abutting block (41) is connected to one end of each moving rod (42) that penetrates through the positioning column (4);The drive assembly is arranged on the positioning column (4), and the drive assembly is used for synchronously driving each moving rod (42) to move towards the direction of being pulled out of the positioning column (4).

4. The rocker arm drilling jig of claim 3 wherein: The drive assembly includes rotating rod (44) and rotating cylinder (45), the rotating rod (44) is movably inserted into the mounting through hole (43), the outer thread is arranged on the peripheral wall of the rotating rod (44), the clamping groove is formed in the peripheral wall of the rotating rod (44) along the length direction of the rotating rod (44), the clamping block (46) is fixedly connected to the inner wall of the positioning column (4), and the clamping block (46) is slidably clamped in the clamping groove;The rotating cylinder (45) is rotatably connected to the positioning column (4) around the axis of the positioning column (4), the rotating rod (44) is inserted into the rotating cylinder (45) and is threadedly connected with the rotating cylinder (45), and one end of the moving rod (42) inserted into the mounting through hole (43) of the positioning column (4) is provided with an inclined surface (421), and one end of the rotating rod (44) inserted into the mounting through hole (43) is abutted with the inclined surface (421).

5. The rocker arm drilling jig of claim 3 wherein: The anti-skid lines (411) are formed on the peripheral wall of the arc-shaped abutting block (41).

6. The rocker arm drilling fixture of claim 1 wherein: The positioning column (4) is rotationally connected to the rotating plate (3) around its own axis, a worm wheel (33) is coaxially connected to the positioning column (4), a worm (32) is rotationally connected to the rotating plate (3), the worm (32) is engaged with the worm wheel (33), and a rotating disc (34) is arranged on the worm (32).

7. The rocker arm drilling jig of claim 1 wherein: The bottom of the sliding plate (2) is rotationally connected with a rotating gear (28) around the width direction of the base (1), the base (1) is provided with a rack (12), the rotating gear (28) is engaged with the rack (12); the locking piece (22) comprises a locking bolt, the locking bolt is threadedly connected to the sliding plate (2), and the threaded end of the bolt is used for abutting against the side wall of the base (1).

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