A reamer for machining the inner hole of an oil cylinder

Abstract

The present invention relates to the technical field of reaming, in particular to a reaming machine for machining the inner hole of an oil cylinder. A chuck is fixedly connected to a workbench. One end of the chuck is provided with a component for cutting and flushing, and the other end is provided with a slider. A driven gear is connected to a reciprocating threaded rod. A driving gear is meshed with the driven gear. A support shaft is fixedly connected to the driving gear. The support shaft is rotatably connected to the workbench through a bearing. A connecting shaft and a driving shaft are rotatably connected to the workbench through bearings. A first incomplete gear is fixedly connected to the connecting shaft. A second incomplete gear is fixedly connected to the driving shaft. The first incomplete gear is meshed with the driving gear, and the second incomplete gear is meshed with the driven gear. The connecting shaft and the driving shaft are driven by a same-direction driving mechanism. The present invention avoids scratching the hole wall and ensures the smoothness of the hole wall.

Description

Technical Field

[0001] The present invention relates to the technical field of reaming, and particularly relates to a reaming machine for machining the inner hole of an oil cylinder. Background Art

[0002] Reaming is to improve the smoothness inside the hole. When machining an oil cylinder, in order to ensure the sealing effect between the inner wall of the oil cylinder and the piston, it is necessary to ream the inner wall of the oil cylinder barrel. When machining the oil cylinder, a seamless stainless steel pipe is generally used to process the oil cylinder barrel. When reaming the seamless steel pipe, due to the long length of the oil cylinder, during reaming, the reaming depth is relatively long. Due to the continuous feeding of the reamer, the stainless steel material has strong plastic deformation ability, and the chips are easily extended into a spiral shape to form long spiral chips. The long spiral chips are easy to wind around the reamer as the reamer rotates, and are likely to scratch the hole wall, affecting the smoothness of machining. Summary of the Invention

[0003] The purpose of the present invention is to solve the disadvantages in the prior art that the chips are easily extended into a spiral shape to form long spiral chips, and the long spiral chips are easy to wind around the reamer as the reamer rotates, and are likely to scratch the hole wall, affecting the smoothness of machining, and to propose a reaming machine for machining the inner hole of an oil cylinder.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] Design a reaming machine for machining the inner hole of an oil cylinder, including a workbench. A chuck is fixedly connected to the workbench. One end of the chuck is provided with a component for cutting and flushing, and the other end is provided with a slider.

[0006] A chute is opened on the workbench, and the slider is slidably arranged in the chute. A reciprocating threaded rod is threadedly penetrated through the slider. The reciprocating threaded rod is rotationally connected to the chute through a bearing. A first motor is fixedly connected to the slider, and a reamer is drivingly connected to the output shaft of the first motor.

[0007] A driven gear is connected to the reciprocating threaded rod. A driving gear is meshed with the driven gear. A support shaft is fixedly connected to the driving gear. The support shaft is rotationally connected to the workbench through a bearing. A connecting shaft and a driving shaft are rotationally connected to the workbench through bearings. A first incomplete gear is fixedly connected to the connecting shaft, and a second incomplete gear is fixedly connected to the driving shaft. The first incomplete gear is meshed with the driving gear, and the second incomplete gear is meshed with the driven gear. The connecting shaft and the driving shaft are driven by a same-direction driving mechanism.

[0008] Preferably, the components for cutting and flushing include a support frame, which is fixedly connected to the workbench. A connecting pipe is penetrated through the support frame. The connecting pipe is communicated with a storage box through a connecting hose. The storage box is placed on the workbench, and a high-pressure pump is arranged on the connecting hose.

[0009] Preferably, a bolt is threadedly connected to the support frame, and the bolt abuts against the connecting pipe.

[0010] Preferably, a collection box is placed on the workbench.

[0011] Preferably, the co-directional driving mechanism includes a second motor. The output shaft of the second motor is in transmission connection with the driving shaft. Belt pulleys are fixedly connected to both the driving shaft and the connecting shaft, and a belt is sleeved between the two belt pulleys.

[0012] Preferably, the driven gear is rotatably connected to the reciprocating threaded rod through a bearing. A connecting sleeve is fixedly connected to the driven gear. A plurality of abutting blocks are penetrated through the connecting sleeve at equal circumferential distances. Hinge rods are hinged to the plurality of abutting blocks. A connecting groove is formed on the reciprocating threaded rod, and a limiting groove is formed on the inner wall of the connecting groove. A moving shaft is arranged in the connecting groove. A limiting strip is fixedly connected to the moving shaft, and the limiting strip is slidably arranged in the limiting groove. A driven friction wheel is fixedly connected to the moving shaft. A connecting ring is fixedly connected to the driven friction wheel, and a slewing bearing is fixedly connected to the connecting ring. The outer shaft surface of the slewing bearing is hinged to the plurality of hinge rods. A main friction wheel is fixedly connected to the driving shaft, and the main friction wheel is offset from the driven friction wheel. A hydraulic rod is rotatably connected to the driven friction wheel through a thrust ball bearing.

[0013] Preferably, a protective shell is fixedly connected to the workbench, and the second motor and the hydraulic rod are both fixedly connected to the protective shell.

[0014] Preferably, the second motor is a low-speed motor.

[0015] A reamer for machining the inner hole of an oil cylinder proposed by the present invention has the beneficial effects that during retraction of the tool, continuous cutting is interrupted, and the chip is forced to break, which can effectively reduce the generation of long spiral chips, reduce the chip entanglement on the tool, thereby avoiding scratching the hole wall and ensuring the smoothness of the hole wall. Since the machining method is to feed and then retract the tool, the hole wall is processed in segments, forming multiple short-stroke machining intervals. The volume of chips generated each time is significantly reduced, reducing the possibility of chip entanglement or blockage in the hole. And the formation of short chips is more easily washed away from the machining area by the cutting fluid for chip removal. Description of the Drawings

[0016] Figure 1Schematic structural diagram of a reaming machine for internal hole machining of an oil cylinder proposed by the present invention;

[0017] Figure 2 Stereogram of a reaming machine for internal hole machining of an oil cylinder proposed by the present invention;

[0018] Figure 3 Stereogram of a reaming machine for internal hole machining of an oil cylinder (with the protective shell partially hidden) proposed by the present invention;

[0019] Figure 4 A reaming machine for internal hole machining of an oil cylinder proposed by the present invention Figure 3 Front view;

[0020] Figure 5 Stereogram of the driven gear and the second incomplete gear part of a reaming machine for internal hole machining of an oil cylinder proposed by the present invention Figure 1 ;

[0021] Figure 6 Stereogram of the driven gear and the second incomplete gear part of a reaming machine for internal hole machining of an oil cylinder proposed by the present invention Figure 2 ;

[0022] Figure 7 Rear view of the driven gear and the second incomplete gear part of a reaming machine for internal hole machining of an oil cylinder proposed by the present invention;

[0023] Figure 8 Stereogram of a part of the co-directional driving mechanism of a reaming machine for internal hole machining of an oil cylinder proposed by the present invention;

[0024] Figure 9 Stereogram of the driven friction wheel part of a reaming machine for internal hole machining of an oil cylinder proposed by the present invention.

[0025] In the figure: 1. Workbench; 2. Collection box; 3. Storage box; 4. Chuck; 5. Connecting pipe; 6. Connecting hose; 7. High-pressure pump; 8. Reamer; 9. Slide groove; 10. First motor; 11. Slide block; 12. Reciprocating threaded rod; 13. Protective shell; 14. Second motor; 15. Hydraulic rod; 16. First incomplete gear; 17. Pulley; 18. Belt; 19. Driving gear; 20. Connecting shaft; 21. Driving shaft; 22. Main friction wheel; 23. Driven friction wheel; 24. Hinge rod; 25. Connecting sleeve; 26. Moving shaft; 27. Abutting block; 28. Connecting groove; 29. Limiting strip; 30. Limiting groove; 31. Support shaft; 32. Driven gear; 33. Second incomplete gear; 34. Support frame; 35. Slewing bearing; 36. Connecting ring. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0027] Embodiment 1: Refer to Figures 1 - 8 , a reamer for machining the inner hole of an oil cylinder, including a workbench 1, a chuck 4 is fixedly connected to the workbench 1, a component for cutting and flushing is arranged at one end of the chuck 4, and a slider 11 is arranged at the other end. The stainless steel pipe is clamped and fixed by the chuck 4 to ensure coincidence with the axis of the reamer 8.

[0028] A chute 9 is provided on the workbench 1, a slider 11 is slidably arranged in the chute 9, a reciprocating threaded rod 12 is threadedly penetrated through the slider 11, the reciprocating threaded rod 12 is rotationally connected to the chute 9 through a bearing, a first motor 10 is fixedly connected to the slider 11, a tool holder is fixedly connected to the output shaft of the first motor 10, the reamer 8 is fixed by the tool holder, the reamer 8 is driven to rotate by the rotation of the first motor 10, and at the same time, the same-direction driving mechanism drives the reciprocating threaded rod 12 to rotate, driving the slider 11 to slide in the chute 9, feeding the reamer 8, so that the reamer reams the inner wall of the stainless steel pipe.

[0029] A driven gear 32 is connected to the reciprocating threaded rod 12, a driving gear 19 is meshed with the driven gear 32, and the number of teeth of the driving gear 19 is greater than that of the driven gear 32, so that when the tool is fed, the feeding distance of the tool each time is greater than the retracting distance each time. A support shaft 31 is fixedly connected to the driving gear 19, the support shaft 31 is rotationally connected to the workbench 1 through a bearing, a connecting shaft 20 and a driving shaft 21 are rotationally connected to the workbench 1 through bearings, a first incomplete gear 16 is fixedly connected to the connecting shaft 20, a second incomplete gear 33 is fixedly connected to the driving shaft 21. When the first incomplete gear 16 is meshed with the driving gear 19, the second incomplete gear 33 is separated from the driven gear 32. When the second incomplete gear 33 is meshed with the driven gear 32, the first incomplete gear 16 is separated from the driving gear 19, and they are meshed alternately. The connecting shaft 20 and the driving shaft 21 are driven by the same-direction driving mechanism. When the connecting shaft 20 and the driving shaft 21 rotate simultaneously, first, as Figures 5 - 7As shown, the first incomplete gear 16 first meshes with the driving gear 19, and the driving gear 19 meshes with the driven gear 32, and the driven gear 32 drives the reciprocating threaded rod 12 to adjust the position of the slider 11 in the slide groove 9, so that the reamer 8 is fed. After continuous rotation, the first incomplete gear 16 first disengages from the driving gear 19, and the second incomplete gear 33 meshes with the driven gear 32, and the second incomplete gear 33 drives the driven gear 32 to rotate, so that the rotation direction of the driven gear 32 is opposite to the feeding direction, so as to retract the tool, and the number of teeth of the second incomplete gear 33 is much smaller than the number of teeth of the first incomplete gear 16, so that the first incomplete gear 16 is disengaged ... is meshed with the driven gear 32, and the second incomplete gear 33 drives the driven gear 32 to rotate, so that the rotation direction of the driven gear 32 is opposite to the feeding direction, so as to retract the tool, and the number of teeth of the second incomplete gear 33 is much smaller than the number of teeth of the first incomplete gear 16, so that the first incomplete gear 16 is disengaged from the driving gear 19, and the second incomplete gear 33 is disengaged from the driving gear 19, and the second incomplete gear 33 is disengaged from the driven gear 32, The meshing time of the second incomplete gear 33 is shorter than the meshing time of the first incomplete gear 16, so that the feeding distance is greater than the retracting distance. Since the continuous cutting is interrupted when retracting, the chips are forced to break, which can effectively reduce the generation of long spiral debris and reduce the chips wrapping around the tool, thereby avoiding scratching the hole wall and ensuring the smoothness of the hole wall. At the same time, during processing, the processing method is to feed and then retract the tool, forming segmented processing for the hole wall, forming multiple short-stroke processing intervals, and significantly reducing the volume of chips generated at a single time, reducing the possibility of chips wrapping or clogging in the hole, and the short chips are more easily flushed away from the processing area by the cutting fluid for chip removal.

[0030] The cutting and flushing components include a support frame 34, which is fixedly connected to the workbench 1. A connecting pipe 5 is provided through the support frame 34. The connecting pipe 5 is connected to a storage box 3 through a connecting hose 6. The storage box 3 is placed on the workbench 1. A high-pressure pump 7 is provided on the connecting hose 6. Cutting fluid is placed in the storage box 3. The cutting fluid is sprayed from the connecting pipe 5 through the high-pressure pump 7 and enters the stainless steel pipe. When processing is carried out, it has a flushing effect on the processing area, which is beneficial to the discharge of debris and has a cooling effect on the processing area and the tool.

[0031] Bolts are threadedly connected to the support frame 34, and the bolts are in contact with the connecting pipe 5. By adjusting the position of the connecting pipe 5 on the support frame 34 and then fixing the position of the connecting pipe 5 by tightening the bolts, oil cylinders of different lengths can be processed.

[0032] A collecting box 2 is placed on the workbench 1 , and the collecting box 2 is used to collect chips and cutting fluid to prevent the chips from entering the chute 9 and affecting the movement of the slider 11 .

[0033] The same-direction driving mechanism includes a second motor 14, which is a low-speed motor. The output shaft of the second motor 14 is transmission-connected to the driving shaft 21. The driving shaft 21 and the connecting shaft 20 are both fixedly connected with pulleys 17, and a belt 18 is sleeved between the two pulleys 17. The second motor 14 rotates slowly, and under the action of the pulleys 17 and the belt 18, the driving shaft 21 and the connecting shaft 20 will be driven to rotate in the same direction and at the same speed.

[0034] Embodiment 2: In Embodiment 1, after the feed, a retraction is required. As a result, when the slider 11 is reset, the slider 11 may move backward after the feed, resulting in an extended movement distance and an extended time required for resetting, which is not conducive to the machining process. Refer to Figures 1 - 9 , as another preferred embodiment of the present invention, based on Embodiment 1.

[0035] The driven gear 32 is rotatably connected to the reciprocating threaded rod 12 through a bearing. The bearing can be a thrust ball bearing. A connecting sleeve 25 is fixedly connected to the driven gear 32. A plurality of abutting blocks 27 are circumferentially and equidistantly penetrated through the connecting sleeve 25. A hinge rod 24 is hinged to each of the plurality of abutting blocks 27. When the hydraulic rod 15 extends, the hinge rod 24 will be pushed to move the abutting block 27, so that the abutting block 27 abuts against the reciprocating threaded rod 12, so that the reciprocating threaded rod 12 and the driven gear 32 rotate together. When the abutting block 27 is separated from the reciprocating threaded rod 12, only the reciprocating threaded rod 12 rotates. A connecting groove 28 is formed in the reciprocating threaded rod 12. A limiting groove 30 is formed in the inner wall of the connecting groove 28. A moving shaft 26 is arranged in the connecting groove 28. A limiting strip 29 is fixedly connected to the moving shaft 26. The limiting strip 29 is slidably arranged in the limiting groove 30. When the hydraulic rod 15 expands and contracts to drive the moving shaft 26 to move, the limiting strip 29 will be driven to slide in the limiting groove 30. At the same time, when the moving shaft 26 rotates, the limiting strip 29 and the limiting groove 30 will rotate simultaneously, thereby driving the reciprocating threaded rod 12 to rotate coaxially.

[0036] A driven friction wheel 23 is fixedly connected to the moving shaft 26. A connecting ring 36 is fixedly connected to the driven friction wheel 23. The connecting ring 36 is fixedly connected to a slewing bearing 35. The design purpose of the slewing bearing 35 is that when the tool is reset, the rotation of the driven friction wheel 23 will not drive the connecting sleeve 25 to rotate, so that the driven gear 32 will not rotate. At the same time, it can also bear the axial force. The outer shaft surface of the slewing bearing 35 is hinged to a plurality of hinged rods 24. A main friction wheel 22 is fixedly connected to the driving shaft 21. The main friction wheel 22 is offset from the driven friction wheel 23. A hydraulic rod 15 is rotatably connected to the driven friction wheel 23 through a thrust ball bearing. When resetting, the hydraulic rod 15 retracts. The hydraulic rod 15 is a hydraulic telescopic rod with a self-locking function, driving the driven friction wheel 23 to move. The driven friction wheel 23 abuts against the main friction wheel 22, causing the hinged rod 24 to pull the abutting block 27 to move. The abutting block 27 disengages from the abutment against the reciprocating threaded rod 12. When the second motor 14 drives the driving shaft 21 to rotate, causing the main friction wheel 22 to rotate, it will drive the driven friction wheel 23 to rotate, driving the moving shaft 26 to rotate. The moving shaft 26 drives the reciprocating threaded rod 12 to rotate, so that only the reciprocating threaded rod 12 rotates and the driven gear 32 does not rotate, preventing the slider 11 from retracting when moving, so as to drive the slider 11 to reset, reset the position of the tool, save the reset time, and facilitate the machining progress.

[0037] When reaming, the stainless steel pipe is fixed by the chuck 4. Two motors are started. Under the action of the belt pulley 17 and the belt 18, the second motor 14 will drive the driving shaft 21 and the connecting shaft 20 to rotate in the same direction and at the same speed. The first incomplete gear 16 drives the driving gear 19 to mesh. The meshing of the driving gear 19 drives the driven gear 32. The driven gear 32 drives the reciprocating threaded rod 12 to adjust the position of the slider 11 in the chute 9 for feeding. Subsequently, the first incomplete gear 16 disengages from the driving gear 19, and the second incomplete gear 33 meshes with the driven gear 32. The second incomplete gear 33 drives the driven gear 32 to rotate, causing the reciprocating threaded rod 12 to rotate in the opposite direction to the first rotation direction for retracting the tool. In this way, segmented reaming is carried out in a cycle, and the reaming is rinsed with cutting fluid during reaming; when resetting, the hydraulic rod 15 retracts, driving the driven friction wheel 23 to move. The driven friction wheel 23 abuts against the main friction wheel 22. At the same time, the hinged rod 24 pulls the abutting block 27 to move. The abutting block 27 disengages from the abutment against the reciprocating threaded rod 12. The second motor 14 rotates to drive the main friction wheel 22 to rotate. The main friction wheel 22 drives the driven friction wheel 23 to rotate. The driven friction wheel 23 drives the moving shaft 26 to rotate. The moving shaft 26 drives the reciprocating threaded rod 12 to rotate to reset the tool.

[0038] Example 3: Refer to Figures 1 - 2, as another preferred embodiment of the present invention, on the basis of Embodiment 2, a protective shell 13 is fixedly connected to the workbench 1, and the second motor 14 and the hydraulic rod 15 are both fixedly connected to the protective shell 13. The use of the protective shell 13 prevents the gears from being exposed, which is beneficial to the safety during operation.

[0039] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A reaming machine for machining inner holes of a cylinder, comprising a workbench (1), characterized in that: A chuck (4) is fixedly connected to the workbench (1), and a component for cutting and flushing is provided at one end of the chuck (4), and a slider (11) is provided at the other end; The workbench (1) is provided with a slide groove (9), the slide block (11) is slidably arranged in the slide groove (9), a reciprocating threaded rod (12) is threadedly connected to the slide block (11), the reciprocating threaded rod (12) is rotatably connected to the slide groove (9) via a bearing, the slide block (11) is fixedly connected to a first motor (10), and a reamer (8) is drivingly connected to an output shaft of the first motor (10); The reciprocating threaded rod (12) is connected to a driven gear (32), the driven gear (32) is meshed with a driving gear (19), the driving gear (19) is fixedly connected to a support shaft (31), the support shaft (31) is rotatably connected to the workbench (1) via a bearing, the workbench (1) is rotatably connected to a connecting shaft (20) and a driving shaft (21) via a bearing, the connecting shaft (20) is fixedly connected to a first incomplete gear (16), the driving shaft (21) is fixedly connected to a second incomplete gear (33), the first incomplete gear (16) is meshed with the driving gear (19), the second incomplete gear (33) is meshed with the driven gear (32), and the connecting shaft (20) and the driving shaft (21) are driven by a co-directional driving mechanism.

2. A reaming machine for machining inner holes of a cylinder according to claim 1, characterized in that: The cutting and flushing component comprises a support frame (34), the support frame (34) is fixedly connected to the workbench (1), a connecting pipe (5) is provided through the support frame (34), the connecting pipe (5) is connected to a storage box (3) through a connecting hose (6), the storage box (3) is placed on the workbench (1), and a high-pressure pump (7) is provided on the connecting hose (6).

3. A reaming machine for machining inner holes of a cylinder according to claim 2, characterized in that: The support frame (34) is threadedly connected with a bolt, and the bolt abuts against the connecting pipe (5).

4. A reaming machine for machining inner holes of a cylinder according to claim 3, characterized in that: A collection box (2) is placed on the workbench (1).

5. A reaming machine for machining inner holes of a cylinder according to any one of claims 1 to 4, characterized in that: The same-direction driving mechanism comprises a second motor (14), the output shaft of the second motor (14) being transmission-connected to the driving shaft (21), the driving shaft (21) and the connecting shaft (20) being fixedly connected with pulleys (17), and a belt (18) being sleeved between the two pulleys (17).

6. A reaming machine for machining inner holes of a cylinder according to claim 5, characterized in that: The driven gear (32) is rotatably connected to the reciprocating threaded rod (12) via a bearing; a connecting sleeve (25) is fixedly connected to the driven gear (32); a plurality of abutment blocks (27) are equidistantly arranged on the circumference of the connecting sleeve (25); a hinged rod (24) is hingedly connected to each of the plurality of abutment blocks (27); a connecting groove (28) is provided on the reciprocating threaded rod (12); a limiting groove (30) is provided on the inner wall of the connecting groove (28); a moving shaft (26) is provided in the connecting groove (28); a limiting strip (29) is fixedly connected to the moving shaft (26); the limiting strip (29) is hingedly connected to the connecting groove (28); and the limiting strip (29) is hingedly connected to the connecting groove (28). The positioning bar (29) is slidably arranged in the limiting groove (30); a slave friction wheel (23) is fixedly connected to the movable shaft (26); a connecting ring (36) is fixedly connected to the slave friction wheel (23); a slewing bearing (35) is fixedly connected to the connecting ring (36); an outer axial surface of the slewing bearing (35) is hinged to a plurality of hinged rods (24); a main friction wheel (22) is fixedly connected to the driving shaft (21); the main friction wheel (22) is offset from the slave friction wheel (23); and a hydraulic rod (15) is rotatably connected to the slave friction wheel (23) via a thrust ball bearing.

7. A reaming machine for machining inner holes of a cylinder according to claim 6, characterized in that: A protective shell (13) is fixedly connected to the workbench (1), and the second motor (14) and the hydraulic rod (15) are both fixedly connected to the protective shell (13).

8. A reaming machine for machining inner holes of a cylinder according to claim 7, characterized in that: The second motor (14) is a low-speed motor.

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