Lower crankcase threaded hole tapping equipment
Patent Information
- Application Number
- CN202522444681.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-18
AI Technical Summary
In the existing technology, the hole machining process of the lower crankcase die casting is complicated, resulting in long processing time and making it impossible to perform drilling, tapping and milling operations efficiently.
Design an integrated device comprising a fixture assembly and multiple tapping devices, capable of simultaneously tapping heater mounting holes, drain screw holes, sensor mounting screw holes, and gearbox connection screw holes, reducing processes and improving efficiency.
This technology enables simultaneous tapping of multiple holes, reducing processing time and improving processing efficiency.
Smart Images
Figure CN224927130U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machinery, specifically to a processing equipment for automotive parts. Background Technology
[0002] The lower crankcase of an engine, also known as the oil pan, is a removable, sealed housing at the bottom of the car engine. It is a key component of the lubrication system, primarily responsible for sealing the crankcase, storing lubricating oil, and preventing impurities from entering. For example... Figure 1 , 2 As shown, the lower crankcase is roughly square and semi-shell-shaped. Its edge has a flange plate that connects to the engine crankcase bottom plate. Several through holes for connecting to the engine crankcase bottom plate are provided along the flange plate's direction. A mating plate for connecting to the gearbox housing is designed on the outer side wall of the lower crankcase. The mating plate is perpendicular to the plane of the flange plate and has several gearbox connection bolt holes. The side wall of the lower crankcase also has heater mounting bolt holes and drain bolt holes, located on two opposite side walls of the lower crankcase, and on the side wall adjacent to the mating plate. Sensor mounting bolt holes are located at the bottom of the lower crankcase.
[0003] Currently, automotive engines are gradually replacing traditional sheet metal lower crankcase parts with die-cast lower crankcase parts. After the die-cast lower crankcase blank is produced, subsequent steps include drilling the connecting through holes in the engine crankcase base plate and drilling the heater mounting screw holes; then tapping the heater mounting holes, drain screw holes, sensor mounting screw holes, and gearbox connecting screw holes. Simultaneously, rough milling of the outer end faces of the sensor mounting screw holes, heater mounting holes, and drain screw holes, as well as milling (rough and finish milling) of the mating disc are required to obtain a smooth mounting surface.
[0004] In the existing technology, the drilling, tapping, and milling operations of the above holes are all carried out in steps (the connecting through hole and heater mounting screw hole of the engine crankcase bottom plate are drilled in steps, the heater mounting hole, drain screw hole, sensor mounting screw hole and gearbox connecting screw hole are tapped in steps, and the outer end face of the sensor mounting screw hole, the outer end face of the heater mounting hole, the outer end face of the drain screw hole and the mating plate are milled in steps); this results in many post-processing steps for the die-cast parts, which takes a long time. Summary of the Invention
[0005] This invention provides an integrated device capable of simultaneously tapping heater mounting holes, drain screw holes, sensor mounting screw holes, and gearbox connection screw holes, reducing traditional tapping steps and saving tapping time. The main technical solutions adopted are as follows: A lower crankcase threaded hole tapping device, the key features of which are: a base, on which a clamping assembly, a heater mounting hole tapping device, an oil drain screw hole tapping device, a sensor mounting screw hole tapping device and a gearbox connection screw hole tapping device are configured; The fixture assembly includes a fixture base plate, which is horizontally fixed on the base, and a workpiece receiving area is formed above the fixture base plate; The heater mounting hole tapping device and the oil drain hole tapping device are located on both sides of the fixture assembly, and the working parts of the heater mounting hole tapping device and the oil drain hole tapping device face the workpiece receiving area; The working part of the sensor mounting screw hole tapping device is located above the clamp assembly; The gearbox connection screw hole tapping device is located on one side of the fixture assembly, and the working part of the gearbox connection screw hole tapping device faces the workpiece receiving area.
[0006] This technical solution rationally integrates and arranges the heater mounting hole tapping device, the oil drain screw hole tapping device, the sensor mounting screw hole tapping device, and the gearbox connection screw hole tapping device, enabling them to perform multi-directional and multi-hole tapping operations simultaneously in one process, reducing tapping steps and saving tapping time. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of one side of the engine oil pan cavity. Figure 2 A schematic diagram of the structure of one side of the top of the engine oil pan; Figure 3 This is a structural schematic diagram of the present invention from a first-view perspective; Figure 4 This is a structural schematic diagram of the present invention from a second perspective; Figure 5 This is a schematic diagram of the fixture assembly 2; Figure 6 This is a schematic diagram of the structure of the first tapping assembly 32; Figure 7 This is a schematic diagram of the fourth tapping assembly 62. Detailed Implementation
[0008] The present invention will be further described below with reference to the embodiments and accompanying drawings.
[0009] like Figure 3-7 As shown, a lower crankcase threaded hole tapping device includes a base 1, on which a clamping assembly 2, a heater mounting hole tapping device 3, an oil drain screw hole tapping device 4, a sensor mounting screw hole tapping device 5, and a gearbox connection screw hole tapping device 6 are disposed. The base 1 is equipped with a liquid collection hopper for collecting milling fluid during the milling process. The outlet of the liquid collection hopper extends to the outside of the base 1 and is connected to a circulating filtration system (not shown in the figure). The base 1 is also equipped with a protective cover (not shown in the figure), and the fixture assembly 2, heater mounting hole tapping device 3, drain screw hole tapping device 4, sensor mounting screw hole tapping device 5, and gearbox connection screw hole tapping device 6 are all located inside the protective cover. The target, the lower crankcase cavity, is machined with its orientation vertically downwards.
[0010] The clamping assembly 2 includes a clamping base plate 21, which is horizontally fixed on the base 1, and a workpiece receiving area is formed above the clamping base plate 21. The clamping assembly 2 further includes guide posts 22, positioning pins 23, support platforms 24, and a clamping mechanism 25 arranged on the upper surface of the clamping base plate 21. There are four guide posts 22 arranged around the edge of the target lower crankcase, specifically around the outer edge of the flange plate, to assist in placing the target lower crankcase into position. There are two positioning pins 23 perpendicular to the clamping base plate 21, used to align with positioning holes designed on the target lower crankcase. There are at least three support platforms 24, used to provide support for the target lower crankcase, specifically for the flange plate. The clamping mechanism 25 is used to clamp the target lower crankcase. The clamping mechanism 25 uses a mature cylinder clamping assembly; its structure and installation method are not described in detail here.
[0011] The heater mounting hole tapping device 3 and the oil drain screw hole tapping device 4 are located on both sides of the fixture assembly 2, and the working parts of the heater mounting hole tapping device 3 and the oil drain screw hole tapping device 4 face the workpiece receiving area. The heater mounting hole tapping device 3 includes a first transverse moving component 31 and a first tapping component 32. The base of the first transverse moving component 31 is fixed on the base 1. The first tapping component 32 is mounted on the moving part of the first transverse moving component 31. The moving part of the first transverse moving component 31 slides back and forth in a straight line in the horizontal direction to approach or move away from the workpiece receiving area. The working part of the first tapping component 32 faces the workpiece receiving area. The first tapping assembly 32 includes a first motor assembly 321, a first multi-spindle housing 322, a first spindle 323, a first gear assembly 324, a first counter-spindle 325, and a first tap 326. There are multiple first counter-spindles 325 and multiple first taps 326, with each first counter-spindle 325 and each first tap 326 corresponding to another. The first multi-spindle housing 322 is fixed to the moving part of the first transverse moving assembly 31. The first motor assembly 321 is mounted on the first multi-spindle housing 322. The first spindle 323, the first gear assembly 324, and the first counter-spindle 325 are all mounted inside the first multi-spindle housing 322. The first main spindle 323, the first secondary spindle 325, and the first tap 326 are all horizontally arranged. The first main spindle 323 and the first secondary spindle 325 are respectively mounted in the first multi-spindle housing 322 by bearings. One end of the first main spindle 323 extends out of the first multi-spindle housing 322 and is connected to the first motor assembly 321 for transmission. The extended end of the first main spindle 323 is away from the clamp assembly 2. One end of the first secondary spindle 325 extends out of the first multi-spindle housing 322 and is coaxially fixedly connected to the root of the first tap 326. The extended end of the first secondary spindle 325 is close to the clamp assembly 2. The first gear assembly 324 includes a driving gear mounted on the first main shaft 323 and a driven gear mounted on the first secondary shaft 325. The driving gear and the driven gear mesh to drive the first main shaft 323 to rotate the first secondary shaft 325, thereby driving the first tap 326 to rotate.
[0012] The oil drain hole tapping device 4 includes a second lateral moving component 41 and a second tapping component 42. The base of the second lateral moving component 41 is fixed on the base 1. The second tapping component 42 is mounted on the moving part of the second lateral moving component 41. The moving part of the second lateral moving component 41 slides linearly in the horizontal direction to approach or move away from the workpiece receiving area. The working part of the second tapping component 42 faces the workpiece receiving area. The sliding direction of the moving part of the second lateral moving component 41 is parallel to the sliding direction of the moving part of the first lateral moving component 31. The second tapping component 42 includes a second motor component and a second tap. The second motor component is mounted on the moving part of the second lateral moving component 41. The second tap is axially connected to the output shaft of the second motor component.
[0013] The working part of the sensor mounting screw hole tapping device 5 is located above the clamp assembly 2; the sensor mounting screw hole tapping device 5 includes a tapping support base 51, a third lifting assembly 52, and a third tapping assembly 53; the bottom of the tapping support base 51 is provided with a relief cavity, the tapping support base 51 straddles the oil drain screw hole tapping device 4, the tapping support base 51 is mounted on the base 1, the second tapping assembly 42 passes through the relief cavity, the base of the third lifting assembly 52 is mounted on the tapping support base 51, the moving part of the third lifting assembly 52 slides linearly back and forth in the vertical direction, the third tapping assembly 53 is fixed on the moving part of the third lifting assembly 52, the third tapping assembly 53 is located above the clamp assembly 2, and the working part of the third tapping assembly 53 faces downward toward the clamp assembly 2. The third tapping assembly 53 includes a third motor assembly and a third tap. The third motor assembly is mounted on the moving part of the third lifting assembly 52, and the root of the third tap is coaxially connected to the output shaft of the third motor assembly.
[0014] The gearbox connection screw hole tapping device 6 is located on one side of the fixture assembly 2, with its working part facing the workpiece receiving area. The gearbox connection screw hole tapping device 6 includes a fourth longitudinal moving assembly 61 and a fourth tapping assembly 62. The base of the fourth longitudinal moving assembly 61 is fixed to the base 1. The moving part of the fourth longitudinal moving assembly 61 slides linearly back and forth in the horizontal direction. The sliding direction of the moving part of the fourth longitudinal moving assembly 61 is perpendicular to the sliding direction of the moving part of the first transverse moving assembly 31. The fourth tapping assembly 62 is mounted on the moving part of the fourth longitudinal moving assembly 61, with its working part facing the workpiece receiving area. The fourth tapping assembly 62 includes a fourth motor assembly 621, a fourth multi-spindle housing 622, a fourth main spindle 623, a fourth gear assembly 624, a fourth counter-spindle 625, and a fourth tap 626. Multiple fourth counter-spindles 625 and multiple fourth taps 626 are present, with each counter-spindle 625 and tap 626 corresponding to another. The fourth multi-spindle housing 622 is fixed to the moving part of the fourth longitudinal moving assembly 61. The fourth motor assembly 621 is mounted on the fourth multi-spindle housing 622. The fourth main spindle 623, the fourth gear assembly 624, and the fourth counter-spindle 625 are all mounted inside the fourth multi-spindle housing 622. The fourth main spindle 623, the fourth counter-spindle 625, and the fourth tap 626 are all horizontally arranged. One end of the fourth main spindle 623 extends out of the fourth multi-spindle housing 622 and is connected to the fourth motor assembly 621 for transmission. The extended end of the fourth main spindle 623 extends through the clamp assembly 2. One end of the fourth counter-spindle 625 extends out of the fourth multi-spindle housing 622. The multi-axis housing 622 is coaxially and fixedly connected to the root of the fourth tap 626, and the protruding end of the fourth auxiliary shaft 625 is close to the clamp assembly 2; the fourth main shaft 623 and the fourth auxiliary shaft 625 are respectively equipped with drive gears, and the drive gear on the fourth main shaft 623 and the drive gear on the fourth auxiliary shaft 625 mesh to drive the fourth auxiliary shaft 625 to rotate, and the head of the fourth tap 626 faces the clamp assembly 2.
[0015] The first lateral movement assembly 31, the second lateral movement assembly 41, the third lifting assembly 52, and the fourth longitudinal movement assembly 61 can be selected as linear electric actuators or linear sliding mechanisms. The first tap 326, the second tap, the third tap, and the fourth tap 626 form the working parts of the corresponding devices.
[0016] Beneficial effects: By adopting the solution of this utility model, the tapping operation of multiple holes in the lower crankcase is integrated into one, which can simultaneously tap the heater mounting screw hole, oil drain screw hole, sensor mounting screw hole and gearbox connection screw hole, reducing the tapping process and saving tapping time.
[0017] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. The first and second perspectives do not specifically refer to a particular viewing direction, but rather represent two different viewing directions. Those skilled in the art, guided by the teachings of this invention, can make various similar representations without departing from the spirit and claims of this invention, and all such modifications fall within the protection scope of this invention.
Claims
1. A tapping device for threaded holes in a lower crankcase, characterized in that: Includes a base (1), on which a clamp assembly (2), a heater mounting hole tapping device (3), an oil drain hole tapping device (4), a sensor mounting hole tapping device (5), and a gearbox connection hole tapping device (6) are mounted. The fixture assembly (2) includes a fixture base plate (21), which is horizontally fixed on the base (1), and a workpiece receiving area is formed above the fixture base plate (21); The heater mounting hole tapping device (3) and the drain screw hole tapping device (4) are located on both sides of the fixture assembly (2), and the working parts of the heater mounting hole tapping device (3) and the drain screw hole tapping device (4) face the workpiece receiving area. The working part of the sensor mounting screw hole tapping device (5) is located above the clamp assembly (2); The gearbox connecting screw hole tapping device (6) is located on one side of the fixture assembly (2), and the working part of the gearbox connecting screw hole tapping device (6) faces the workpiece receiving area.
2. The tapping equipment for the lower crankcase threaded hole according to claim 1, characterized in that: The heater mounting hole tapping device (3) includes a first transverse moving component (31) and a first tapping component (32). The base of the first transverse moving component (31) is fixed on the base (1). The first tapping component (32) is mounted on the moving part of the first transverse moving component (31). The moving part of the first transverse moving component (31) slides back and forth in a straight line in the horizontal direction to approach or move away from the workpiece receiving area. The working part of the first tapping component (32) faces the workpiece receiving area.
3. The tapping equipment for the lower crankcase threaded hole according to claim 2, characterized in that: The first tapping assembly (32) includes a first motor assembly (321), a first multi-spindle box (322), a first spindle (323), a first gear assembly (324), a first counterspindle (325), and a first tap (326); The first multi-axis housing (322) is fixed on the moving part of the first transverse moving assembly (31). The first motor assembly (321) is mounted on the first multi-axis housing (322). The first main shaft (323), the first gear assembly (324), and the first secondary shaft (325) are all mounted inside the first multi-axis housing (322). One end of the first main shaft (323) extends out of the first multi-axis housing (322) and is connected to the first motor assembly (321) for transmission. One end of the first secondary shaft (325) extends out of the first multi-axis housing (322) and is coaxially fixedly connected to the root of the first tap (326). The first gear assembly (324) is configured on the first main shaft (323) and the first secondary shaft (325) such that the first main shaft (323) drives the first secondary shaft (325) to rotate.
4. The tapping equipment for the lower crankcase threaded hole according to claim 2, characterized in that: The oil drain hole tapping device (4) includes a second transverse moving component (41) and a second tapping component (42). The base of the second transverse moving component (41) is fixed on the base (1). The second tapping component (42) is mounted on the moving part of the second transverse moving component (41). The moving part of the second transverse moving component (41) slides back and forth in a straight line in the horizontal direction to approach or move away from the workpiece receiving area. The working part of the second tapping component (42) faces the workpiece receiving area. The sliding direction of the moving part of the second lateral moving component (41) is parallel to the sliding direction of the moving part of the first lateral moving component (31).
5. The tapping equipment for the lower crankcase threaded hole according to claim 4, characterized in that: The sensor mounting screw hole tapping device (5) includes a tapping support base (51), a third lifting component (52), and a third tapping component (53). The bottom of the tapping support base (51) is provided with a relief cavity. The tapping support base (51) spans the oil drain screw hole tapping device (4). The second tapping component (42) passes through the relief cavity. The base of the third lifting component (52) is installed on the tapping support base (51). The moving part of the third lifting component (52) slides back and forth in a straight line in the vertical direction. The third tapping component (53) is fixed on the moving part of the third lifting component (52). The third tapping component (53) is located above the clamping assembly (2). The working part of the third tapping component (53) faces downward toward the clamping assembly (2).
6. The tapping equipment for the lower crankcase threaded hole according to claim 2, characterized in that: The gearbox connecting screw hole tapping device (6) includes a fourth longitudinal moving component (61) and a fourth tapping component (62). The base of the fourth longitudinal moving component (61) is fixed on the base (1). The moving part of the fourth longitudinal moving component (61) slides back and forth in a straight line in the horizontal direction. The sliding direction of the moving part of the fourth longitudinal moving component (61) is perpendicular to the sliding direction of the moving part of the first transverse moving component (31). The fourth tapping component (62) is mounted on the moving part of the fourth longitudinal moving component (61). The working part of the fourth tapping component (62) faces the workpiece receiving area.
7. The tapping device for the lower crankcase threaded hole according to claim 6, characterized in that: The fourth tapping assembly (62) includes a fourth motor assembly (621), a fourth multi-axis box (622), a fourth spindle (623), a fourth gear assembly (624), a fourth counterspindle (625), and a fourth tap (626). The fourth multi-axis housing (622) is fixed on the moving part of the fourth longitudinal moving assembly (61). The fourth motor assembly (621) is mounted on the fourth multi-axis housing (622). The fourth main shaft (623), the fourth gear assembly (624), and the fourth auxiliary shaft (625) are all mounted inside the fourth multi-axis housing (622). One end of the fourth main shaft (623) extends out of the fourth multi-axis housing (622) and is connected to the fourth motor assembly (621) for transmission. One end of the fourth auxiliary shaft (625) extends out of the fourth multi-axis housing (622) and is coaxially fixedly connected to the root of the fourth tap (626). The fourth gear assembly (624) is disposed on the fourth main shaft (623) and the fourth secondary shaft (625) such that the fourth main shaft (623) drives the fourth secondary shaft (625) to rotate.