Engine cylinder body inclined hole processing tool

Abstract

The application provides an engine cylinder body inclined hole processing tool, which comprises a fixed disc, a transmission shaft middle part connected with a lifting connecting base, the lifting connecting base moving synchronously along the axial direction with the transmission shaft; a lower shell can rotate around the axis of the transmission shaft, and the lower shell edge can be inserted into the cylinder hole of the engine; a tool holder is fixed on the fixed disc, the tool holder comprises a rotating sleeve and a feeding sleeve, the transmission shaft is in transmission connection with the rotating sleeve through a first transmission unit, and the lifting connecting base is in transmission connection with the feeding sleeve through a second transmission unit, so that when the transmission shaft moves along the axial direction, the feeding sleeve moves along the axial direction of itself, and when the transmission shaft rotates, the rotating sleeve rotates simultaneously. The lower shell is positioned with the engine cylinder body, the fixed disc and the lower shell rotate with each other, the drill bit can rotate in the cylinder hole of the engine cylinder body, the inclined hole is processed at the cylinder hole, the cylinder body can complete multiple inclined hole processing in one positioning, the production efficiency is improved, and the processing difficulty of the operator is reduced.

Description

Technical Field

[0001] This invention belongs to the field of engine manufacturing technology, and in particular relates to a tooling for machining oblique holes in engine cylinder blocks. Background Technology

[0002] During engine operation, water passage holes need to be made at the cylinder bore. Due to process requirements, water passage holes are often set on the bore wall and tilted downwards. Since engine cylinders are generally heavy, adjusting and fixing the cylinder angle is difficult. Moreover, at least two water passage holes need to be machined at the cylinder bore, and the axes of the two water passage holes form an included angle. This means that machining one cylinder bore in traditional methods requires multiple positioning of the cylinder block, which is difficult to do with general bench drills. Machining and fixing the cylinder block increases the physical exertion of workers, and the cylinder block cannot be stably fixed, which can easily cause engine shaking during machining, leading to machining accidents and damage to machining equipment. Summary of the Invention

[0003] In view of this, the present invention aims to provide a tooling for machining oblique holes in engine cylinder blocks, so as to position the engine cylinder block and the drill bit to facilitate the machining of oblique holes.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A tooling for machining oblique holes in an engine cylinder block, including A fixed disk, through which a drive shaft capable of moving along its own axis passes, the middle of which is connected to a lifting connecting seat, the lifting connecting seat and the drive shaft moving synchronously along the axis; The lower housing is rotatable around the axis of the drive shaft. The edge of the lower housing can be inserted into the cylinder bore of the engine, and an observation notch is provided on one side of the lower housing. A tool holder is built into the lower housing. The tool holder includes a rotating sleeve and a feed sleeve. The drive shaft is connected to the rotating sleeve via a first drive unit, and the lifting connecting seat is connected to the feed sleeve via a second drive unit, so that when the drive shaft moves axially, the feed sleeve moves axially, and when the drive shaft rotates, the rotating sleeve rotates simultaneously. The rotating sleeve is equipped with a drill bit.

[0005] Furthermore, the first transmission unit includes a main transmission gear, a double transmission gear, and a driven bevel gear. The main transmission gear is coaxially connected to the transmission shaft. One of the gears of the double transmission gear meshes with the main transmission gear, and the other gear meshes with the driven bevel gear. The tooth shaft of the driven bevel gear is coaxially connected to the rotating sleeve.

[0006] Furthermore, the second transmission unit includes a transmission rack and a gear shaft. The feed sleeve is fitted outside the rotating sleeve. The top end of the transmission rack is fixed to the lifting connecting seat, and the bottom end meshes with one end of the gear shaft. The side wall of the feed sleeve is provided with multiple protruding teeth, and the other end of the gear shaft meshes with the protruding teeth of the feed sleeve.

[0007] Furthermore, an upper housing is fixedly mounted on the fixed plate, and a positioning pin is provided on the edge of the upper housing. The positioning pin can move along its own axial direction. The lower housing has multiple positioning holes, and the positioning pin can be inserted into the positioning holes when it is at the lower limit position.

[0008] Furthermore, the positioning pin has multiple toothed grooves on one side, a drive gear meshes with the toothed grooves, and the axle of the drive gear is connected to a pressure handle.

[0009] Furthermore, a positioning plate is provided on the top of the lower housing, and the positioning hole is opened on the edge of the positioning plate.

[0010] Furthermore, the bottom edge of the lower housing extends downwards with two arc-shaped positioning edges, and the arcs containing the two positioning edges lie within the same circle, and the positioning edges can be inserted into the cylinder bore of the cylinder body.

[0011] Furthermore, a positioning post extends downward from the outer edge of the bottom of the lower housing.

[0012] Furthermore, a return spring is fitted on the drive shaft, and a spring washer is fitted on the top of the drive shaft. The bottom end of the return spring is pressed against the upper housing, and the top end is pressed against the spring washer.

[0013] Compared with the prior art, the engine cylinder block oblique hole machining fixture of the present invention has the following advantages: This invention uses a lower housing and an engine cylinder block for positioning, and a fixed plate to mount a transmission unit and a drill bit. The drill bit can rotate within the cylinder bore of the engine cylinder block through the mutual rotation of the fixed plate and the lower housing. The transmission shaft and transmission unit provide rotation and feed for the drill bit, thereby machining oblique holes at the cylinder bore. This allows the cylinder block to complete the machining of multiple oblique holes in one positioning, improving production efficiency and reducing the machining difficulty for operators. Attached Figure Description

[0014] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the machining tooling; Figure 2 This is a schematic diagram of the internal transmission structure of the tooling; Figure 3 This is a cross-sectional schematic diagram of the working part of the drill bit inside the tool holder; Figure 4 This is a schematic diagram of the lower shell structure; Figure 5 This is a schematic diagram of the lower housing and locating pin structure.

[0015] Explanation of reference numerals in the attached figures: 1-Fixed disc; 8-Upper housing; 81-Positioning pin; 82-Driving gear; 83-Pressure handle; 2-Drive shaft; 3-First transmission unit; 31-Main transmission gear; 32-Double transmission gear; 33-Driven bevel gear; 4-Second transmission unit; 41-Lifting connecting seat; 42-Transmission rack; 43-Gear shaft; 5-Lower housing; 51-Positioning disc; 52-Positioning hole; 53-Positioning edge; 54-Positioning pin; 55-Observation notch; 6-Tool holder; 61-Rotating sleeve; 62-Feed sleeve; 7-Drill bit. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0017] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] The engine block oblique hole machining fixture of the present invention includes an upper housing 8, a fixed plate 1, and a lower housing 5. The upper housing 8 has a fixed plate 1 at its bottom, and the fixed plate 1 and the upper housing 8 together form a receiving cavity. A tool holder 6 is provided inside the lower housing 5 and is fixedly connected to the fixed plate 1. A drill bit 7 is mounted on the tool holder 6. The bottom end of a drive shaft 2 passes through the upper housing 8 and the fixed plate 1, and is connected to the tool holder 6 via a first drive unit 3 and a second drive unit 4. During operation, the rotation of the drive shaft 2 and its own axial movement drive the drill bit 7 on the tool holder 6 to rotate and feed.

[0021] Specifically, the middle part of the drive shaft 2 is connected to a lifting connecting seat 41. The lifting connecting seat 41 moves synchronously with the drive shaft 2 along the axial direction. The lifting connecting seat 41 is connected to the outer ring of a bearing, and the drive shaft 2 is connected to the inner ring of the bearing, so that the drive shaft 2 can rotate around its own axial direction, while simultaneously driving the lifting connecting seat 41 to move in the vertical direction. The tool holder 6 includes a rotating sleeve 61 and a feed sleeve 62. The drive shaft 2 is connected to the rotating sleeve 61 through a first transmission unit 3, and the lifting connecting seat 41 is connected to the feed sleeve 62 through a second transmission unit 4, so that when the drive shaft 2 moves along the axial direction, the feed sleeve 62 moves along its own axial direction. When the drive shaft 2 rotates, the rotating sleeve 61 rotates around its own axial direction. The drill bit 7 is fixed on the rotating sleeve 61. Specifically, how the rotating sleeve 61 fixes the drill bit 7 is a matter of existing technology, where the connection method between the machine tool spindle and the tool or drill bit 7 is existing technology, and will not be described further here.

[0022] The first transmission unit 3 includes a main transmission gear 31, a double transmission gear 32, and a driven bevel gear 33. The main transmission gear 31 is coaxially connected to the transmission shaft 2 and is positioned above the fixed disk 1. One of the gears of the double transmission gear 32 meshes with the main transmission gear 31. The gear shaft 43 of the double transmission gear 32 passes through the fixed disk 1 so that the other gear meshes with the driven bevel gear 33. The gear shaft 43 of the driven bevel gear 33 is coaxially connected to the rotating sleeve 61. The driven bevel gear 33 makes the axis of the rotating sleeve 61 form an angle with the horizontal plane. The specific angle parameters of the bevel gear and the double gear meshing with it are selected or designed according to the machining requirements of the inclined hole, so that the axis of the rotating sleeve 61 is parallel to the axis of the machined inclined hole. The second transmission unit 4 includes a transmission rack 42 and a gear shaft 43. The feed sleeve 62 is sleeved outside the rotating sleeve 61. The top end of the transmission rack 42 is fixed to the lifting connecting seat 41, and the bottom end meshes with one end of the gear shaft 43. The side wall of the feed sleeve 62 is provided with multiple protruding teeth. The other end of the gear shaft 43 meshes with the protruding teeth of the feed sleeve 62. When the transmission shaft 2 moves axially, the lifting connecting seat 41 drives the gear shaft 43 to rotate through the transmission rack 42, thereby driving the feed sleeve 62 to move along its own axial direction. The feed sleeve 62 is sleeved outside the rotating sleeve 61.

[0023] The lower housing 5 is positioned below the upper housing 8. Observation notches 55 are opened on both sides of the lower housing 5, and two arc-shaped positioning edges 53 extend downward from the inner edge of the lower housing 5. The arcs containing the two positioning edges 53 are located within the same circle. The positioning edges 53 can be inserted into the cylinder bore of the cylinder body. A positioning post 54 is also fixed on the bottom end face of the lower housing 5 for insertion with the hole on the periphery of the cylinder bore, thereby positioning the cylinder bore and the lower housing 5. A positioning plate 51 is provided on the top of the lower housing 5. The edge of the upper housing 8 can overlap the positioning plate 51 and rotate relative to the positioning plate 51. The angle of the drill bit 7 of the tool holder 6 below the fixed plate 1 is adjusted by rotating the upper housing 8.

[0024] A positioning pin 81 is fixedly mounted on the upper housing 8. The positioning pin 81 can move along its own axial direction. The lower housing 5 has multiple positioning holes 52. When the positioning pin 81 is at its lower limit position, it can be inserted into the positioning hole 52. Specifically, in order to control the movement of the positioning pin 81, multiple tooth grooves are opened on one side of the positioning pin 81. A drive gear 82 meshes with the tooth grooves. The axle of the drive gear 82 is connected to a pressure handle 83. The positioning hole 52 is opened on the edge of the positioning plate 51. After the drill bit 7 is adjusted to a predetermined angle, the operator can control the positioning pin 81 to move downward by turning the pressure handle 83, thereby fixing the upper housing 8 and the lower housing 5 relative to each other, so as to facilitate drilling at the cylinder bore.

[0025] To facilitate the reset of the drive shaft 2 after processing, a reset spring is fitted on the drive shaft 2, and a spring washer is fitted on the top of the drive shaft 2. The bottom end of the reset spring is pressed against the upper housing 8, and the top end is pressed against the spring washer.

[0026] The engine cylinder block oblique hole machining fixture of the present invention, during use, first moves the engine cylinder block to a predetermined position so that the fixture is placed below the cylinder hole to be machined. Then, the lower housing 5 is positioned with the cylinder hole by the positioning edge 53 and positioning pin 54. Then, the drill spindle is lowered so that the bottom of the upper housing 8 sits on the positioning plate 51 of the lower housing 5. The upper housing 8 is rotated to a predetermined angle, and the pressure handle 83 is turned to fix the upper housing 8 and the lower housing 5 together. The drill spindle is started to drive the transmission shaft 2 to rotate and feed, completing the drilling of one oblique hole of the cylinder hole. Then, the pressure handle is turned again so that the positioning pin 81 is raised. After rotating the upper housing 8 to the predetermined angle for the second drilling, the positioning pin 81 is lowered to complete the machining of the second oblique hole of the cylinder hole. Then, the drill table is raised, the cylinder block is moved to the next cylinder hole to be machined, and the above work is repeated until the cylinder block oblique hole machining is completed.

[0027] Those skilled in the art should know that, in order to facilitate the rotation of the upper housing 8, a handle can be provided on the periphery of the upper housing 8; the feed sleeve 62, gear shaft 43 and other parts are fixedly supported by the internal structure of the tool holder 6.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tooling for machining oblique holes in an engine cylinder block, characterized in that: include A fixed disk, through which a drive shaft capable of moving along its own axis passes, the middle of the drive shaft is connected to a lifting connecting seat, the lifting connecting seat and the drive shaft move synchronously along the axis, the lifting connecting seat is connected to the outer ring of a bearing, and the drive shaft is connected to the inner ring of the bearing; The lower housing is rotatable around the axis of the drive shaft, and the edge of the lower housing can be inserted into the cylinder bore of the engine; a tool holder is fixed on the fixed plate, the tool holder includes a rotating sleeve and a feed sleeve, the drive shaft is connected to the rotating sleeve through a first drive unit, and the lifting connecting seat is connected to the feed sleeve through a second drive unit, so that when the drive shaft moves axially, the feed sleeve moves axially, and when the drive shaft rotates, the rotating sleeve rotates simultaneously; The rotating sleeve is equipped with a drill bit; The first transmission unit includes a main transmission gear, a double transmission gear, and a driven bevel gear. The main transmission gear is coaxially connected to the transmission shaft. One of the gears of the double transmission gear meshes with the main transmission gear, and the other gear meshes with the driven bevel gear. The rotating shaft of the driven bevel gear is coaxially connected to the rotating sleeve. The second transmission unit includes a transmission rack and a gear shaft. The feed sleeve is sleeved outside the rotating sleeve. The top end of the transmission rack is fixed to the lifting connecting seat, and the bottom end meshes with one end of the gear shaft. The side wall of the feed sleeve is provided with multiple protruding teeth, and the other end of the gear shaft meshes with the protruding teeth of the feed sleeve. An upper housing is also fixed on the fixed plate. A positioning pin is provided on the edge of the upper housing. The positioning pin can move along its own axis. Multiple positioning holes are opened on the lower housing. When the positioning pin is at the lower limit position, it can be inserted into the positioning hole.

2. The tooling for machining oblique holes in an engine cylinder block according to claim 1, characterized in that: The positioning pin has multiple toothed grooves on one side, and a drive gear meshes with the toothed grooves. The axle of the drive gear is connected to a pressure handle.

3. The tooling for machining oblique holes in an engine cylinder block according to claim 1, characterized in that: The lower housing is provided with a positioning plate at the top, and the positioning hole is opened on the edge of the positioning plate.

4. The tooling for machining oblique holes in an engine cylinder block according to claim 1, characterized in that: The bottom edge of the lower housing extends downwards into two arc-shaped positioning edges, and the arcs containing the two positioning edges lie within the same circle. The positioning edges can be inserted into the cylinder bore of the cylinder body.

5. The tooling for machining oblique holes in an engine cylinder block according to claim 4, characterized in that: The lower housing has a positioning post extending downward from its bottom outer edge.

6. The tooling for machining oblique holes in an engine cylinder block according to claim 1, characterized in that: A return spring is fitted on the drive shaft, and a spring washer is fitted on the top of the drive shaft. The bottom end of the return spring is pressed against the upper housing, and the top end is pressed against the spring washer.

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