Deep hole drilling machine for machining long through hole of eccentric shaft

Abstract

The utility model relates to a deep hole drilling machine for processing a long through hole of an eccentric shaft in the technical field of deep hole drilling, which is characterized in that a sliding rail is arranged on a working table of a drilling machine base, two groups of drill bit assemblies capable of moving left and right are symmetrically arranged above the sliding rail, and two groups of driving devices for driving the drill bit assemblies to move are arranged in the working table; a clamping tool for clamping an eccentric shaft to be machined is arranged above the middle of the workbench. The clamping tool comprises a lower fixed clamping block, an upper movable clamping block and a clamping air cylinder. The drill bit assembly comprises a driving motor, a reduction gearbox and a drill chuck, a drill rod is installed in the drill chuck, a transmission rotating shaft is rotationally arranged in the reduction gearbox, the drill chuck is connected to the output end of the transmission rotating shaft, and the input end of the transmission rotating shaft is connected with the driving motor. According to the deep hole drilling machine, the drilling mode that the two drill bit assemblies conduct bidirectional opposite drilling from the two ends of the eccentric shaft to the middle at the same time is adopted, the deep hole drilling machine can better adapt to drilling operation of a long through hole of the long eccentric shaft, the fracture risk of a long drill rod of the deep hole drilling machine is reduced as much as possible, and the drilling precision and the drilling efficiency of the long through hole are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to deep hole drilling technical field, concretely relates to a deep hole drilling machine for eccentric shaft long through hole processing. BACKGROUND

[0002] The eccentric shaft (or camshaft) is the important component part commonly used on the engine of the vehicle, and the oil hole is arranged along the axial direction of the shaft for providing the oil circuit component part of the lubricating oil for the rotation of the shaft. However, since the length of the shaft is generally long, it is not easy to drill the hole along the axial direction, and the long deep hole processing is needed, and the hole diameter is relatively small, so the relatively long drill bit (or drill rod) is needed. The existing deep hole drilling machine is difficult to adapt to the processing of the relatively long hole, and the drill rod is easily broken during the working process, which not only causes the waste of the drill bit, but also causes the shaft to be scrapped. Therefore, it is necessary to design a deep hole drilling machine device which can be better applied to the long through hole processing of the eccentric shaft. SUMMARY

[0003] In view of the above problems, the utility model provides a deep hole drilling machine for eccentric shaft long through hole processing, which solves the technical problems of the existing deep hole drilling machine and can better adapt to the long deep hole processing of the eccentric shaft long through hole.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A deep hole drilling machine for eccentric shaft long through hole processing, comprising a drilling machine base, a workbench is fixedly arranged above the drilling machine base, a slide rail extending along the left-right direction is fixedly arranged above the workbench, two groups of drill bit assemblies capable of moving left and right are symmetrically arranged above the left and right ends of the slide rail, two groups of driving devices for driving the two drill bit assemblies to move are correspondingly arranged in the workbench, and a clamping tool for horizontally clamping the eccentric shaft to be processed along the left-right direction is arranged above the middle part of the workbench.

[0006] The clamping tool comprises a lower fixed clamping block for supporting the eccentric shaft to be processed, an upper movable clamping block for cooperating with the lower fixed block to lift and clamp the eccentric shaft to be processed, and a clamping cylinder for driving the upper movable clamping block to lift and move.

[0007] The drill bit assembly comprises a driving motor, a speed reducer and a drill chuck, a drill rod for drilling the eccentric shaft to be processed is arranged in the drill chuck, a transmission shaft is rotatably arranged in the speed reducer, the drill chuck is connected to the output end of the transmission shaft, and the input end of the transmission shaft is in transmission connection with the driving motor.

[0008] Further, two lower fixed clamping blocks extending in the front-rear direction are fixed above the workbench in left-right symmetry, and two front-rear symmetrical lower grooves are formed in the upper surfaces of the lower fixed clamping blocks; two upper movable clamping blocks are correspondingly arranged directly above the two lower fixed clamping blocks, and two upper grooves corresponding to the two lower grooves are formed in the lower surfaces of the two upper movable clamping blocks, and two to-be-processed eccentric shafts can be simultaneously installed between the two upper and lower grooves; preferably, the acting surfaces of the two upper and lower grooves are all arc surfaces, and anti-skid pads are further laid on the inner sides of the arc surfaces; two clamping cylinders are correspondingly arranged above the two upper movable clamping blocks, and the two clamping cylinders are fixedly installed on the workbench through two cylinder mounting frames, and the acting ends of the two clamping cylinders are correspondingly hingedly connected to the middle upper parts of the two upper movable clamping blocks.

[0009] Further, two groups of drill bit assemblies are arranged above the slide rails in left-right symmetry, two front-rear symmetrical transmission rotating shafts are rotatably arranged in the two speed reduction boxes of the two groups of drill bit assemblies respectively, the four transmission rotating shafts are all hollow rotating shafts with through holes in the centers, four drill rods are correspondingly installed on the output ends of the four transmission rotating shafts through drill chucks respectively, the drill rods are all hollow drill bits with central holes in the centers, and the acting ends of the four hollow drill bits are respectively located at the two ends of the two to-be-processed eccentric shafts.

[0010] Further, driven wheels are correspondingly arranged on the outer sides of the input ends of the transmission rotating shafts, two driving motors are correspondingly arranged above the two speed reduction boxes, driving wheels are correspondingly installed on the output shafts of the two driving motors, the two driving wheels are both double-groove belt pulleys, and each driving wheel and its corresponding two driven wheels are transmissionally connected through transmission belts respectively; preferably, the diameters of the two grooves of one driving wheel are the same, and the two grooves are synchronously transmissionally connected with the two driven wheels through two transmission belts respectively; and rotary joints are correspondingly connected to the end portions of the input ends of the transmission rotating shafts respectively.

[0011] Further, a cooling liquid tank is arranged on one side of the drilling machine base, a cooling liquid pump is arranged on the cooling liquid tank, the rotary joints of the four transmission rotating shafts are connected with the liquid outlet ends of the cooling liquid pump through hoses respectively, the hollow drill bits are provided with cooling liquid through the hollow rotating shafts respectively, and the cooling liquid flowing out of the hollow drill bits is returned to the cooling liquid tank through the collecting tank of the drilling machine base.

[0012] Further, each group of the driving device comprises a driving screw and a power motor, two ends of the two driving screws corresponding to the two groups of the driving device are rotatably installed in the drilling machine base through rotary bearings respectively, and outer ends of the two driving screws are in transmission connection with the two power motors, bottoms of the two speed reducers are slidably arranged above the slide rails through slide blocks respectively, the bottoms of the two speed reducers are connected with spiral auxiliary sliding tables respectively, the spiral auxiliary sliding tables are correspondingly screwed on the two driving screws respectively, and long holes for the left and right movement of the two spiral auxiliary sliding tables are formed in the upper part of the drilling machine base.

[0013] Further, a protective cover is arranged above the drilling machine base, the workbench, the clamping tool and the drill assembly arranged on the workbench are located in the protective cover, an operation window is formed in the middle of the front side of the protective cover, and a switchable safety door is arranged on the front side of the operation window.

[0014] Further, the safety door comprises two push-pull doors which can be pushed and pulled leftward and rightward, slide rails extending along the leftward and rightward directions are arranged on the upper and lower parts of the front side of the protective cover respectively, and the upper and lower parts of the two push-pull doors are slidably connected with the slide rails through slide blocks respectively.

[0015] The utility model also includes other components which can make it normal use, are the conventional means in the art, in addition, the device or component which is not added in the utility model, such as: clamping air cylinder, driving screw, spiral auxiliary sliding table, hollow drill, hollow rotating shaft, rotary joint, cooling liquid tank, cooling liquid pump etc., all adopt the prior art in the field.

[0016] The utility model has the advantages of the following:

[0017] The utility model provides a kind of deep hole drilling machine for eccentric shaft long through hole processing, adopts two groups of drill assembly to drill from the two ends of eccentric shaft to the middle bidirectional drilling, can better adapt to the drilling operation of the eccentric shaft long through hole of length, possibly reduce deep hole drilling machine long drill rod fracture risk, guarantee the drilling precision and drilling efficiency of long through hole. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of deep hole drilling machine in example.

[0019] Figure 2 It is Figure 1 It is the structure schematic diagram along A-A direction.

[0020] Figure 3 It is Figure 1 It is the structure schematic diagram along B-B direction.

[0021] Figure 4 It is Figure 1A schematic diagram of the view structure along the CC direction. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0023] It should be noted that the terms "up," "down," "front," "back," "left," "right," "inner," and "outer," which indicate directions or positional relationships, are based on the attached drawings and are used only for ease of description.

[0024] Example

[0025] like Figures 1-4 As shown, a deep hole drilling machine for machining long through holes of eccentric shafts includes a drilling machine base 1, a worktable 2 fixedly installed above the drilling machine base, a slide rail 3 extending in the left-right direction fixedly laid above the worktable, two sets of drill bit assemblies that can move left and right symmetrically arranged above the left and right ends of the slide rail, two sets of driving devices for driving the two drill bit assemblies to move are correspondingly arranged inside the worktable, and a clamping fixture for horizontally clamping the eccentric shaft 4 to be machined in the left-right direction is arranged above the middle part of the worktable.

[0026] The clamping fixture includes a lower fixed clamping block 5 for supporting the eccentric shaft to be processed, an upper movable clamping block 6 for cooperating with the lower fixed block to lift and clamp the eccentric shaft to be processed, and a clamping cylinder 7 for driving the upper movable clamping block to lift and move.

[0027] The drill assembly includes a drive motor 8, a gearbox 9, and a drill chuck 10. A drill rod 11 for drilling the eccentric shaft to be processed is installed inside the drill chuck. A transmission shaft 12 is rotatably arranged inside the gearbox. The drill chuck is connected to the output end of the transmission shaft, and the input end of the transmission shaft is connected to the drive motor.

[0028] Two lower fixed clamping blocks are symmetrically fixed above the worktable, extending in the front-back direction. The upper surface of the lower fixed clamping blocks has two symmetrical lower grooves 13. Two movable upper clamping blocks are correspondingly arranged directly above the two lower fixed clamping blocks. The lower surface of the two movable upper clamping blocks has two upper grooves 14 corresponding to the two lower grooves. Two eccentric shafts to be processed can be installed between the two sets of upper and lower grooves at the same time, which helps to improve work efficiency.

[0029] The action surface of the upper and lower grooves of the two groups is a circular arc surface, and a rubber non-slip pad 15 is matched and laid on the inner side of each circular arc surface, and the action surface of the rubber non-slip pad is provided with knurled patterns; two clamping cylinders are correspondingly arranged above the two upper movable clamping blocks, the two clamping cylinders are correspondingly fixedly installed on the workbench through two cylinder mounting frames 16, and the action ends of the two clamping cylinders are correspondingly hingedly connected to the middle upper portions of the two upper movable clamping blocks.

[0030] Two groups of drill bit assemblies are symmetrically arranged above the slide rails, two symmetrical transmission shafts are rotatably arranged in two speed reduction boxes of the two groups of drill bit assemblies, respectively, four transmission shafts are all hollow shafts with through holes in the centers, four drill rods are correspondingly installed on the output ends of the four transmission shafts through drill chucks, respectively, each drill rod is a hollow drill bit with a central hole in the center, and the action ends of the four hollow drill bits correspond to the two ends of the two eccentric shafts to be machined, respectively.

[0031] Each lower fixed clamping block is further fixed with a limiting plate 17 with a circular hole in the position corresponding to the two lower grooves on the outer side, the diameter of the circular hole is slightly larger than the diameter of the drill rod, the four drill rods are correspondingly movably arranged through the circular holes of the four limiting plates, respectively, so as to prevent excessive swinging of the drill rod, because the drill rod is relatively long, the head of the drill rod swings or vibrates excessively under the action of centrifugal force during rotation, which can easily cause the drill rod to break or the diameter of the long through hole to expand, so that the concentricity is not accurate enough, thereby affecting the drilling precision of the long through hole. Meanwhile, the two-end bidirectional drilling method can effectively improve the drilling efficiency of the long through hole of the eccentric shaft.

[0032] A driven wheel 18 is correspondingly arranged on the outer side of the input end of each transmission shaft, two driving motors are correspondingly arranged above the two speed reduction boxes, a driving wheel 19 is correspondingly installed on the output shaft of each driving motor, each driving wheel is a double-groove belt pulley, each driving wheel and its corresponding two driven wheels are transmissionally connected through a transmission belt 20, respectively; the diameters of the two grooves of one driving wheel are the same, and the two grooves are synchronously transmissionally connected with the two driven wheels through two transmission belts, respectively; a rotary joint 21 is correspondingly connected to the end portion of the input end of each transmission shaft.

[0033] A cooling liquid tank 22 is arranged on one side of the drilling machine base, a cooling liquid pump 23 is arranged on the cooling liquid tank, the rotary joints of the four transmission shafts are connected with the liquid outlet of the cooling liquid pump through hoses 24, respectively, the hose connection does not affect the left-right movement of the drill bit assembly, each hollow drill bit is provided with cooling liquid through the hollow transmission shaft, and the cooling liquid flowing out of each hollow drill bit is returned to the cooling liquid tank through the collection tank of the drilling machine base. The cooling liquid tank, the cooling liquid pump, the hose, the rotary joint, and the collection tank of the drilling machine are all existing technologies, and will not be described in detail here.

[0034] Each group of the driving device includes a driving screw 25 and a power motor 26, two ends of two driving screws corresponding to two groups of driving devices are rotatably installed in the drilling machine base through rotating bearings 27 respectively, and outer ends of the two driving screws are in transmission connection with two power motors, the power motor is fixedly connected with the workbench, the bottom of each of the two speed reducers is slidably arranged above the slide rail through a sliding block 28, each of the two speed reducer bottoms is connected with a screw pair sliding table 29, each of the two screw pair sliding tables is correspondingly screwed on the two driving screws, and a long hole track is formed on the upper surface of the drilling machine base and is matched with the two screw pair sliding tables for left and right movement.

[0035] A protective cover 30 is arranged above the drilling machine base, the workbench, the clamping tool and the drill head assembly arranged on the workbench are located in the protective cover, an operation window 31 is formed in the middle of the front side of the protective cover, and a safety door is arranged on the front side of the operation window.

[0036] The safety door includes two push-pull doors 32 which can be pushed and pulled left and right, sliding rails 33 extending along the left and right directions are arranged on the upper and lower parts of the front side of the protective cover respectively, and the upper and lower parts of the two push-pull doors are slidably connected with the sliding rails through sliding guide blocks 34 respectively.

[0037] The technical scheme of the utility model is not limited to the above-mentioned specific embodiments, and many modifications and changes are obvious to those skilled in the art without deviating from the scope and spirit of the described embodiments, and any technical modification made within the spirit and principles of the utility model falls within the protection scope of the utility model.

Claims

1. A deep hole drilling machine for machining long through holes of eccentric shafts, comprising a drilling machine base, wherein a worktable is fixedly disposed above the drilling machine base, characterized in that: A slide rail extending in the left-right direction is fixedly laid above the workbench. Two sets of drill bit assemblies that can move left and right are symmetrically arranged above the left and right ends of the slide rail. Two sets of drive devices for driving the two drill bit assemblies are correspondingly arranged inside the workbench. A clamping fixture for horizontally clamping the eccentric shaft to be processed in the left-right direction is arranged above the middle part of the workbench. The clamping fixture includes a lower fixed clamping block for supporting the eccentric shaft to be processed, an upper movable clamping block for cooperating with the lower fixed clamping block to lift and clamp the eccentric shaft to be processed, and a clamping cylinder for driving the upper movable clamping block to lift and move. The drill bit assembly includes a drive motor, a reduction gearbox, and a drill chuck. A drill rod for drilling the eccentric shaft to be processed is installed inside the drill chuck. A transmission shaft is rotatably arranged inside the reduction gearbox. The drill chuck is connected to the output end of the transmission shaft. The input end of the transmission shaft is connected to the drive motor.

2. The deep hole drilling machine for machining long through holes of an eccentric shaft according to claim 1, characterized in that: Two lower fixed clamping blocks are symmetrically fixed above the worktable, extending in the front-back direction. The upper surface of each lower fixed clamping block has two symmetrical lower grooves. Two movable upper clamping blocks are correspondingly arranged directly above the two lower fixed clamping blocks. The lower surface of each movable upper clamping block has two upper grooves corresponding to the two lower grooves. Two eccentric shafts to be processed can be installed between the two sets of upper and lower grooves at the same time. Two clamping cylinders are correspondingly arranged above the two movable upper clamping blocks. The two clamping cylinders are fixedly mounted on the worktable by two cylinder mounting brackets. The working ends of the two clamping cylinders are hinged to the upper middle part of the two movable upper clamping blocks.

3. A deep hole drilling machine for machining long through holes of an eccentric shaft according to claim 2, characterized in that: Two sets of drill bit assemblies are symmetrically arranged above the slide rail. Each of the two reduction gearboxes of the two sets of drill bit assemblies has two symmetrically arranged transmission shafts inside. All four transmission shafts are hollow shafts with a through hole in the center. The output ends of the four transmission shafts are each equipped with four drill rods through a drill chuck. Each drill rod is a hollow drill bit with a central hole in the center. The working ends of the four hollow drill bits correspond to the two ends of the two eccentric shafts to be processed.

4. A deep hole drilling machine for machining long through holes of an eccentric shaft according to claim 3, characterized in that: Each of the transmission shafts has a driven wheel on its outer side at the input end. Two drive motors are installed above the two gearboxes. A drive wheel is installed on the output shaft of each drive motor. Both drive wheels are double-groove pulleys. Each drive wheel is connected to its two corresponding driven wheels via a transmission belt. A rotary joint is connected to the end of each transmission shaft input end.

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