A shaft sleeve drilling machine

Abstract

The invention discloses a sleeve drilling machine, comprising: a frame, a servo reduction motor is arranged on one side of the frame, a mandrel is installed on the output shaft of the servo reduction motor, the mandrel has a step, and a circle of drilling avoidance groove is arranged at the end of the mandrel; a top pressure cylinder is arranged on the other side of the frame, a follower top sleeve is sleeved on the outer end of the piston rod of the top pressure cylinder, the follower top sleeve can be freely radially rotated relative to the piston rod through a plane bearing and a ball bearing, and can not be installed on the piston rod axially relative to the piston rod, the follower top sleeve is coaxially distributed with the mandrel, the follower top sleeve can clamp the sleeve in a clamping state with the mandrel under the push of the piston rod of the top pressure cylinder, and at this time the follower top sleeve will not hinder the servo reduction motor from driving the clamped sleeve to rotate through the mandrel; a drilling assembly is also arranged on the frame, which can perform radial drilling on the sleeve clamped and fixed by the mandrel and the follower top sleeve. The invention has the advantage of high working efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of internal combustion engine sliding bearing processing equipment, in particular to a shaft sleeve drilling machine. Background Art

[0002] Sliding bearings are components that fix and reduce the load friction coefficient during mechanical transmission. Specifically, when other parts move relative to each other on the shaft, they are used to reduce the friction coefficient during power transmission and keep the center position of the shaft fixed. The sleeve is a cylindrical mechanical part that fits on the shaft and is an important component of the sliding bearing. When the gap between the shaft and the outer tube is very small, a smooth sleeve is used as a bearing. When machining the sleeve, in order to meet the lubrication requirements, it is necessary to open several radial oil holes on the sleeve wall. The oil holes are usually connected to the oil groove on the inner surface of the sleeve. In order to ensure that there is enough lubricating oil in the groove when the sleeve is working, the oil holes require high machining accuracy. The drilling method generally used at present is: first clamp with a vise or a three-jaw chuck, then manually use a drilling machine to radially drill an oil hole in the annular area to be drilled on the sleeve, then loosen the vise or three-jaw chuck, rotate the sleeve to a certain angle, and then re-clamp with a vise or three-jaw chuck, and then manually use a drilling machine to radially drill the next oil hole in the annular area to be drilled on the sleeve. This drilling method has the following disadvantages: (1) It is easy to cause deformation of the sleeve during clamping, affecting the quality of the sleeve; (2) The sleeve needs to be clamped and disassembled frequently during the sleeve processing process, which has low work efficiency, high difficulty in operation, and the drilling position is very easy to deviate, making it difficult to ensure the drilling quality. Summary of the invention

[0003] The purpose of the invention is to provide a shaft sleeve drilling device with high working efficiency and good drilling quality.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a sleeve drilling machine, comprising: a frame, a servo reduction motor is horizontally arranged on one side of the frame, a core rod for the sleeve to be inserted is coaxially installed on the output shaft of the servo reduction motor, the core rod is set in a variable diameter shape, and a step is formed at the reduced diameter of the core rod for the sleeve to be inserted into the core rod to abut against, a circle of drilling avoidance grooves is arranged on the outer circumferential wall of the end of the core rod, when the sleeve is inserted into the core rod and abuts against the step, the drilling avoidance groove just corresponds to the annular area to be drilled on the sleeve; a top pressure cylinder is horizontally arranged on the other side of the frame, and the outer end of the piston rod of the top pressure cylinder The sleeve is provided with a follower top sleeve, and a plane bearing and a ball bearing are arranged between the follower top sleeve and the piston rod. The follower top sleeve can rotate freely radially relative to the piston rod through the plane bearing and the ball bearing, but cannot be installed on the piston rod axially relative to the piston rod. The follower top sleeve is coaxially distributed relative to the core rod. The follower top sleeve can clamp the shaft sleeve in a clamping state relative to the core rod under the push of the piston rod of the top pressure cylinder, and at this time the follower top sleeve will not hinder the servo reduction motor from driving the clamped shaft sleeve to rotate through the core rod; a drilling assembly is also arranged on the frame, which can perform radial drilling on the shaft sleeve that is clamped and fixed by the core rod and the follower top sleeve.

[0005] Furthermore, in the aforementioned sleeve drilling machine, the drilling assembly includes a driving motor, a drilling power head installed on the output shaft of the driving motor, and a cylinder that drives the driving motor to move.

[0006] Furthermore, the aforementioned sleeve drilling machine, wherein: a horizontal transverse track running left and right is arranged at the top front end of the frame, a mounting frame is slidably arranged on the horizontal transverse track, a servo reduction motor and a top pressure cylinder are arranged on the mounting frame in a left-right relative state, and the mounting frame moves along the horizontal transverse track under the drive of the transverse driving assembly; a horizontal longitudinal track running front and back is arranged at the top rear end of the frame, a slide is slidably arranged on the horizontal longitudinal track, a driving motor is installed on the slide, and a cylinder is installed on the frame for pushing the driving motor and the drilling power head to move along the horizontal longitudinal track.

[0007] Furthermore, the aforementioned sleeve drilling machine, wherein: the structure of the transverse driving assembly includes: a fixed plate is vertically installed on the frame on the left or right side of the mounting frame, a screw rod is passed through the fixed plate, the screw rod is arranged in the fixed plate through a bearing so as to be radially rotatable but not axially movable, a handle is arranged at one end of the screw rod, and the other end of the screw rod passes through the mounting frame and is threadedly connected to the mounting frame.

[0008] Furthermore, in the aforementioned sleeve drilling machine, a push sleeve is provided on the outer shell of the mandrel, and the push sleeve is installed on the mandrel so that it cannot rotate radially relative to the mandrel but can only move axially relative to the mandrel. The push sleeve can move axially outward along the mandrel under the drive of the push assembly to push the sleeve out of the mandrel after drilling, or move axially inward along the mandrel to reset.

[0009] Furthermore, the aforementioned bushing drilling machine, wherein: the structure of the pushing assembly includes: a pushing cylinder is horizontally arranged on the mounting frame, a mounting plate is installed on the piston rod of the pushing cylinder, a push rod is installed on the mounting plate, a circle of annular limiting grooves is arranged on the outer circumferential wall of the pushing sleeve, and an arc-shaped push plate located in the annular limiting groove is connected to the push rod, and the arc-shaped push plate will not hinder the pushing sleeve from rotating with the core rod.

[0010] Furthermore, in the aforementioned sleeve drilling machine, the specific connection structure between the push sleeve and the core rod is as follows: a plurality of axial grooves are circumferentially arranged on the outer circumferential wall of the core rod, and a pin shaft that moves along the corresponding axial groove is respectively arranged in each axial groove, and each pin shaft is connected and fixed on the push sleeve.

[0011] Furthermore, in the aforementioned sleeve drilling machine, a blowing assembly is provided on the frame for blowing and cleaning the sleeve during drilling.

[0012] Furthermore, in the aforementioned sleeve drilling machine, the structure of the blowing assembly includes: a nozzle whose nozzle is downwardly aimed at the drilling avoidance groove on the core rod, and the nozzle is connected to a high-pressure air source through an air pipe.

[0013] Furthermore, in the aforementioned sleeve drilling machine, a sleeve drilling correction mark is provided on the outer wall of the core rod for aligning the joint on the sleeve.

[0014] Through the implementation of the above technical scheme, the beneficial effects of the present invention are: (1) the sleeve will not be deformed during clamping, thereby ensuring the quality of the sleeve; (2) there is no need to frequently clamp and disassemble the sleeve during the sleeve processing process, which is convenient to operate, has high work efficiency, and has good drilling quality, thereby ensuring the drilling quality of the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of a sleeve drilling machine.

[0016] Figure 2 for Figure 1 Schematic diagram of the structure from the right side.

[0017] Figure 3 for Figure 1 An enlarged schematic diagram of the H site shown in FIG.

[0018] Figure 4 for Figure 1 An enlarged schematic diagram of site F is shown in FIG. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the sleeve drilling machine comprises: a frame 1, a horizontal lateral track 2 running left and right is arranged at the top front end of the frame 1, a mounting frame 3 is slidably arranged on the horizontal lateral track 2, the mounting frame 3 moves along the horizontal lateral track 2 under the drive of the lateral drive assembly, a servo reduction motor 4 controlled by a servo controller is arranged horizontally on the left side of the mounting frame 3, a mandrel 5 for the sleeve to be inserted is coaxially installed on the output shaft of the servo reduction motor 4, the mandrel 5 is arranged in a variable diameter shape, and the variable diameter portion of the mandrel 5 forms a The shaft sleeve of the mandrel 5 is inserted into the step against which it abuts, and a circle of drilling avoidance grooves 6 are arranged on the outer circumferential wall of the end of the mandrel 5. When the shaft sleeve is inserted into the mandrel 5 and abuts on the step, the drilling avoidance groove 6 just corresponds to the annular area to be drilled on the shaft sleeve; a top pressure cylinder 7 is arranged horizontally on the right side of the mounting frame 3, and the servo reduction motor 4 and the top pressure cylinder 7 are arranged on the mounting frame 3 in a left-right relative manner. The outer end of the piston rod of the top pressure cylinder 7 is sleeved with a follower top sleeve 8, and a plane bearing 10 and a ball bearing are arranged between the follower top sleeve 8 and the piston rod 9. 11, the follower top sleeve 8 can rotate freely radially relative to the piston rod 9 through the plane bearing 10 and the ball bearing 11, but cannot be installed on the piston rod 9 in the axial direction relative to the piston rod 9. The follower top sleeve 8 is coaxially distributed with the core rod 5. The follower top sleeve 8 can clamp the shaft sleeve in a clamping state with the core rod 5 under the push of the piston rod of the top pressure cylinder 7, and the follower top sleeve 8 will not hinder the servo reduction motor 4 from driving the clamped shaft sleeve to rotate through the core rod 5; the frame 1 is also provided with a device that can clamp the core rod 5 and the follower top sleeve 8. A drilling assembly for radially drilling with a fixed sleeve; in this embodiment, the drilling assembly includes: a horizontal longitudinal track 12 running forward and backward is arranged at the top rear end of the frame 1, a slide 13 is slidably arranged on the horizontal longitudinal track 12, a driving motor 14 is arranged on the slide 13, a drilling power head 15 is installed on the output shaft of the driving motor 14, and the slide 13 moves forward and backward along the horizontal longitudinal track 12 under the drive of the oil cylinder 16 installed on the frame 1. The above-mentioned drilling assembly has a simple structure and is easy to install and maintain;

[0024] In this embodiment, the structure of the transverse driving assembly includes: a fixing plate 17 is vertically installed on the frame 1 on the right side of the mounting frame 3, a screw rod 18 is passed through the fixing plate 17, the screw rod 18 is arranged in the fixing plate 17 through a bearing so as to be radially rotatable but not axially movable, a handle 19 is arranged at one end of the screw rod 18, the other end of the screw rod 18 passes through the mounting frame 3 and is threadedly connected to the mounting frame 3, when the handle 19 rotates forward or reversely the screw rod 18, the mounting frame 3 can be driven to move left or right along the horizontal transverse track 2, the above-mentioned transverse driving assembly has a simple structure and is easy to install and maintain;

[0025] In this embodiment, a push sleeve 20 is provided on the outer sleeve of the core rod 5. When the push sleeve 20 is sleeved on the core rod 5, the push sleeve 20 is a step for the shaft sleeve inserted into the core rod 5 to abut against. The push sleeve 20 cannot rotate radially relative to the core rod 5 but can only be installed on the core rod 5 so as to move axially relative to the core rod 5. The push sleeve 20 can be driven by the push assembly to move axially outward along the core rod 5 until the shaft sleeve after drilling is pushed out of the core rod 5 or to move axially inward along the core rod 5 to reset. In this embodiment, the specific connection structure between the push sleeve 20 and the core rod 5 is as follows: a plurality of axial grooves 25 are circumferentially provided on the outer circumferential wall of the core rod 5, and a pin shaft 26 moving along the corresponding axial groove 25 is respectively provided in each axial groove 25, and each pin shaft 26 is connected and fixed to the push sleeve 20. The above structure is simple and convenient for disassembly and maintenance.

[0026] In this embodiment, the structure of the push assembly includes: a push cylinder 21 is horizontally arranged on the mounting frame 3, a mounting plate 22 is installed on the piston rod of the push cylinder 21, a push rod 23 is installed on the mounting plate 22, a circle of annular limiting grooves 31 are arranged on the outer circumferential wall of the push sleeve 20, and an arc-shaped push plate 24 located in the annular limiting groove 31 is connected to the push rod 23. The arc-shaped push plate 24 will not hinder the push sleeve 20 from rotating with the core rod 5. When the piston rod of the push cylinder 21 is extended or retracted, the push sleeve 20 can be driven by the mounting plate 22, the push rod 23 and the push plate 24 to move axially outward along the core rod 5 to push the drilled shaft sleeve out of the core rod 5 or to move axially inward along the core rod 5 to reset. The above-mentioned push assembly has a simple structure and is easy to install and maintain; in this embodiment, a reset spring 30 is connected between the mounting frame 3 and the mounting plate 22, and the reset spring 30 is used to assist in driving the push sleeve 20 to move axially inward along the core rod 5 to reset;

[0027] In this embodiment, a spray assembly for spraying and cleaning the sleeve during drilling is provided on the frame 1, and the structure of the spray assembly includes: a nozzle 27 with a nozzle downwardly directed at the drilling avoidance groove 6 on the core rod 5, and the nozzle 27 is connected to a high-pressure air source 29 through an air pipe 28, and the drilling quality can be further improved by the spray assembly;

[0028] In this embodiment, a sleeve drilling correction mark is provided on the outer wall of the core rod 5 for aligning the joint on the sleeve; when the joint on the sleeve sleeved on the core rod is aligned with the sleeve drilling correction mark, the oil hole drilled by the drilling assembly on the sleeve is a positioning hole for locating the positions of the remaining oil holes on the sleeve, and the oil hole position is also avoided by the sleeve joint; when the sleeve to be drilled is formed by bending and splicing, since there is a joint on this type of sleeve, in order to ensure the drilling quality, it is necessary not only to avoid the joint when drilling, but also to ensure that the oil hole and the joint are aligned. A certain angle is maintained between the seams, so a positioning hole for locating the positions of the remaining oil holes on the sleeve needs to be drilled. The accurate position of the positioning hole is determined by aligning the seam on the sleeve with the sleeve drilling correction mark on the core rod 5, that is: when the seam on the sleeve sleeved on the core rod 5 is aligned with the sleeve drilling correction mark, the oil hole drilled by the drilling power head 15 on the sleeve is the positioning hole for locating the positions of the remaining oil holes on the sleeve; when the sleeve to be drilled is cast in one piece, there is no need to use the sleeve drilling correction mark;

[0029] The working principle of the present invention is as follows:

[0030] When drilling a sleeve with a seam, first put the sleeve to be drilled on the core rod 5, and then rotate the sleeve to align the seam on the sleeve with the sleeve drilling correction mark. For example, when drilling a sleeve made of integral casting, there is no need to rotate the sleeve after the sleeve is put on the core rod 5.

[0031] Then, the piston rod 9 of the top pressure cylinder 7 is extended to push the follower top sleeve 8 to move toward the core rod 5 until the follower top sleeve 8 presses the shaft sleeve against the push sleeve 20, and the push sleeve 20 is pressed against the step formed at the diameter change part of the core rod 5. At this time, the follower top sleeve 8, the shaft sleeve, the push sleeve 20, the core rod 5 and the output shaft of the servo reduction motor 4 are connected and fixed as a whole, and at this time, the annular area to be drilled on the shaft sleeve just corresponds to the drilling avoidance groove 6 of the core rod 5; then, the handle 19 is turned to drive the mounting frame 3 to move left or right along the horizontal traverse track 2 until the annular area to be drilled on the shaft sleeve is located in the travel path of the drilling power head 15, and the handle 19 is stopped;

[0032] Then, the drive motor 14 is started, so that the drive motor 14 drives the drilling power head 15 to rotate, and at the same time, the oil cylinder 16 drives the drive motor 14 and the drilling power head 15 to move forward along the horizontal longitudinal track 12 until the drilling power head 15 completes the radial drilling of the shaft sleeve. At this time, the oil hole drilled is the positioning hole for locating the positions of the remaining oil holes on the shaft sleeve. During the process of the drilling power head 15 drilling the shaft sleeve, the high-pressure gas source 29 is opened, so that the high-pressure gas in the high-pressure gas source 29 is sprayed and cleaned on the shaft sleeve through the air pipe 28 and the nozzle 27; after the drilling power head 15 completes the drilling operation of one oil hole, the oil cylinder 16 drives the drive motor 14 and the drilling power head 15 to move backward to the initial position along the horizontal longitudinal track 12;

[0033] Then, the servo controller controls the output shaft of the servo reduction motor 4 to rotate according to the position of the positioning hole and the relative positions of the remaining holes and the positioning hole. After the servo reduction motor 4 drives the shaft sleeve clamped by the core rod 5 and the follower top sleeve 8 to rotate to the next oil hole position to align with the drilling power head 15 through the output shaft, the oil cylinder 16 drives the drive motor 14 and the drilling power head 15 to move forward along the horizontal longitudinal track 12 again until the drilling power head 15 completes the radial drilling of the shaft sleeve. The above operation is repeated until the drilling action of all the oil holes on the shaft sleeve is completed.

[0034] Then, the piston rod 9 of the top pressure cylinder 7 is retracted, driving the follower top sleeve 8 to leave the core rod 5. At this time, the follower top sleeve 8 releases the sleeve that has been drilled. Then, the piston rod of the push cylinder 21 is extended, and the push sleeve 20 is synchronously pushed to move axially outward along the core rod 5 through the mounting plate 22, the push rod 23 and the arc-shaped push plate 24 until the sleeve is pushed out of the core rod 5. Then, the piston rod of the push cylinder 21 is retracted, synchronously driving the push sleeve 20 to move axially inward along the core rod 5 to reset.

[0035] The advantages of the present invention are: (1) the shaft sleeve will not be deformed during clamping, thereby ensuring the quality of the shaft sleeve; (2) there is no need to frequently clamp and disassemble the shaft sleeve during the shaft sleeve processing process, the operation is convenient, the work efficiency is high, the drilling quality is good, and the drilling quality of the shaft sleeve is ensured.

[0036] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. A sleeve drilling machine, comprising: The frame is characterized in that: a servo reduction motor is horizontally arranged on one side of the frame, and a core rod for the sleeve to be inserted is coaxially installed on the output shaft of the servo reduction motor. The core rod is set in a variable diameter shape, and a step is formed at the reduced diameter of the core rod for the sleeve inserted into the core rod to abut against. A circle of drilling avoidance grooves is arranged on the outer circumferential wall of the end of the core rod. When the sleeve is inserted into the core rod and abuts against the step, the drilling avoidance groove just corresponds to the annular area to be drilled on the sleeve; a top pressure cylinder is horizontally arranged on the other side of the frame, and a follower top sleeve is sleeved on the outer end of the piston rod of the top pressure cylinder, and a plane bearing and a ball bearing are arranged between the follower top sleeve and the piston rod. The follower top sleeve can rotate freely radially relative to the piston rod through the plane bearing and the ball bearing, but cannot move axially relative to the piston rod. The machine frame is provided with a drilling assembly which can perform radial drilling on the sleeve clamped and fixed by the core rod and the following top sleeve; the drilling assembly comprises: a driving motor, a drilling power head installed on the output shaft of the driving motor, and an oil cylinder which drives the driving motor to move; a horizontal traverse track running left and right is provided at the top front end of the frame, a mounting frame is slidably provided on the horizontal traverse track, the servo reduction motor and the ram cylinder are arranged on the mounting frame in a left-right relative state, and the mounting frame is arranged on the traverse track. The driving assembly moves along the horizontal transverse track; a horizontal longitudinal track running forward and backward is arranged at the top rear end of the frame, a slide seat is slidably arranged on the horizontal longitudinal track, a driving motor is installed on the slide seat, and a cylinder is installed on the frame to push the driving motor and the drilling power head to move along the horizontal longitudinal track; the structure of the transverse driving assembly includes: a fixed plate is vertically installed on the frame on the left or right side of the mounting frame, a screw rod is passed through the fixed plate, the screw rod is arranged in the fixed plate through a bearing so as to be radially rotatable but not axially movable, a handle is arranged at one end of the screw rod, and the other end of the screw rod passes through the mounting frame and is threadedly connected to the mounting frame; a push sleeve is arranged on the outer sleeve of the mandrel, and the push sleeve cannot rotate radially relative to the mandrel but can only be installed to be axially movable relative to the mandrel On the core rod, the push sleeve can move outward along the axial direction of the core rod under the drive of the push assembly until the sleeve after drilling is pushed out of the core rod or moved inward along the axial direction of the core rod to reset; the structure of the push assembly includes: a push cylinder is horizontally arranged on the mounting frame, a mounting plate is installed on the piston rod of the push cylinder, a push rod is installed on the mounting plate, a circle of annular limit grooves is arranged on the outer circumferential wall of the push sleeve, and an arc-shaped push plate located in the annular limit groove is connected to the push rod, and the arc-shaped push plate will not hinder the push sleeve from rotating with the core rod; the specific connection structure of the push sleeve and the core rod is: a plurality of axial slide grooves are arranged along the circumferential direction on the outer circumferential wall of the core rod, and a pin shaft moving along the corresponding axial slide groove is respectively arranged in each axial slide groove, and each pin shaft is connected and fixed on the push sleeve.

2. A sleeve drilling machine according to claim 1, characterized in that: A blowing assembly for blowing and cleaning the shaft sleeve during drilling is arranged on the frame.

3. The sleeve drilling machine according to claim 1, characterized in that: The structure of the blowing assembly comprises: a nozzle with a nozzle downwardly directed to a drilling avoidance groove on a core rod, and the nozzle is connected to a high-pressure air source through an air pipe.

4. The sleeve drilling machine according to claim 1, characterized in that: A sleeve drilling correction mark is arranged on the outer wall of the core rod for aligning the joint on the sleeve.

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