An engine connecting rod production hole opening device

Abstract

The utility model belongs to the technical field of trepanning device, and disclose a kind of trepanning device for engine connecting rod production, including workbench, be provided with drilling machine on workbench, and be fixedly connected with support plate on workbench, the outer surface rotationally connected with rotating shaft of support plate, the outer surface fixedly connected with connecting plate of rotating shaft, the front end fixedly connected with mounting block of connecting plate, and mounting block is detachably connected with positioning needle, and be fixedly connected with motor on workbench, and the output end fixedly connected with two-way screw rod of motor, and be screw-connected with screw block on two-way screw rod, the outer surface rotationally connected with connecting rod of screw block. Before formal trepanning processing, by the cooperation of support plate, rotating shaft, connecting plate, mounting block and positioning needle, first punch a small diameter positioning hole on workpiece, and use the small hole as positioning reference when subsequent large hole trepanning, small hole can be used as the initial guide hole of drill bit, improve the centring of large hole trepanning, reduce the risk of off-hole and inclined hole, improve processing precision and stability.

Description

Technical Field

[0001] This utility model belongs to the technical field of hole-opening devices, specifically a hole-opening device for engine connecting rod production. Background Technology

[0002] As the "heart" of automobiles, construction machinery, and ships, the performance (power, fuel consumption, and reliability) of the engine directly depends on the machining precision of its core components. The connecting rod, a key force-transmitting component that transmits the reciprocating motion of the piston to the rotational motion of the crankshaft within the engine, must simultaneously withstand cyclic tensile, compressive, and bending loads. Therefore, it places extremely high demands on its structural integrity and dimensional accuracy. The drilling process is a crucial link in the transition from semi-finishing to finishing—subsequent processes such as bushing press-fitting, bolt tightening, and dynamic balancing all rely on the size and position of the drilled hole. If the drilling precision is substandard, the entire connecting rod will be scrapped.

[0003] Meanwhile, an engine connecting rod drilling fixture with application number CN202320228729.9 includes a support platform and a worktable fixed to the back side of the support platform. A first sliding groove is formed near the upper end of the front surface of the support platform, and a second sliding groove is formed in the middle of the front surface of the support platform. A second slider is slidably installed inside the second sliding groove. A positioning pin is fixed to the front surface of the second slider. A double-acting screw is rotatably installed inside the first sliding groove, and a first slider threadedly connected to the double-acting screw is symmetrically slidably installed inside the first sliding groove. A connecting plate is fixed to the front surface of both first sliders. A clamping plate is fixed to the upper end of the connecting plate. A limit frame is installed on the clamping surface of both clamping plates. A trolley is slidably installed on the upper surface of the worktable, and a robotic arm is provided on the trolley.

[0004] However, the following problems were found in the implementation of the relevant technology: when drilling directly with a large-diameter drill bit, the drill bit may wobble due to the initial contact point deviation, causing the hole position to deviate from the design reference and exceed the accuracy requirements, making it difficult to meet the hole position accuracy, resulting in a high scrap rate, and subsequent problems such as bolt misalignment and crankshaft jamming during assembly.

[0005] Therefore, we propose a hole-opening device for engine connecting rod production. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides an engine connecting rod production hole-opening device, which has the advantages of drilling a positioning hole as a positioning reference before the formal hole-opening process, reducing the risk of off-center or skewed holes, and improving processing accuracy and stability.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an engine connecting rod drilling device, comprising a worktable, a drilling machine mounted on the worktable, a support plate fixedly connected to the worktable, a rotating shaft rotatably connected to the outer surface of the support plate, a connecting plate fixedly connected to the outer surface of the rotating shaft, a mounting block fixedly connected to the front end of the connecting plate, a positioning pin detachably connected to the mounting block, a motor fixedly connected to the worktable, a bidirectional lead screw fixedly connected to the output end of the motor, a threaded block threadedly connected to the bidirectional lead screw, a connecting rod rotatably connected to the outer surface of the threaded block, a movable clamping plate rotatably connected to the other end of the connecting rod, a fixed clamping plate fixedly connected to the worktable, and a baffle fixedly connected to the upper surface of the movable clamping plate.

[0008] Preferably, the movable clamping plate is movably connected to the fixed clamping plate, and a slider is fixedly connected to the lower surface of the movable clamping plate.

[0009] Preferably, the worktable is provided with a sliding groove, which is slidably connected to the slider.

[0010] Preferably, a laser light is provided on the workbench.

[0011] Preferably, a handle is fixedly connected to the outer surface of the mounting block, and the handle is provided with anti-slip texture.

[0012] Preferably, the bidirectional lead screw is provided with slide bars on both sides, and the threaded block is slidably connected to the slide bars.

[0013] Preferably, the mounting block is provided with a slot, and a spring ball is provided in the slot.

[0014] Preferably, the upper surface of the positioning pin is fixedly connected to a four-corner block, and the four-corner block is provided with a hemispherical groove. The positioning pin is mounted on the mounting block through the hemispherical groove and the spring ball.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the cooperation of a support plate, a rotating shaft, a connecting plate, a mounting block and a positioning pin, first drills a small-diameter positioning hole on the workpiece before the formal hole drilling process, and uses this small hole as a positioning reference when drilling the large hole later. The small hole can also serve as the initial guide hole for the drill bit, improving the centering of the large hole drilling, reducing the risk of off-center or skewed holes, and improving the processing accuracy and stability.

[0016] 2. This utility model, through the cooperation of a motor, a two-way lead screw, a threaded block, a connecting rod, a movable clamping plate, a fixed clamping plate, and a baffle, can stably clamp and fix the connecting rod, so that the relative position of the connecting rod remains basically unchanged throughout the entire hole-making process. This avoids hole position runout and tolerance fluctuation caused by workpiece displacement, clamping loosening, or deformation. Stable clamping can suppress the eccentricity and runout of the tool path caused by workpiece micro-movement, and improve the consistency of hole diameter. Attached Figure Description

[0017] Figure 1 This is a right-side view of the overall structure of this utility model; Figure 2 This is a left-side view of the overall structure of this utility model; Figure 3 This is a schematic diagram of a partial connection structure of the workbench of this utility model; Figure 4 This is a schematic diagram of the support plate connection structure of this utility model; Figure 5 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0018] In the diagram: 1. Workbench; 2. Drilling machine; 3. Support plate; 4. Rotating shaft; 5. Connecting plate; 6. Mounting block; 7. Positioning pin; 8. Motor; 9. Two-way lead screw; 10. Threaded block; 11. Connecting rod; 12. Movable clamping plate; 13. Fixed clamping plate; 14. Baffle; 15. Slide groove; 16. Slider; 17. Slide rod; 18. Laser light. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 5As shown, this utility model provides an engine connecting rod production drilling device, including a workbench 1, a drilling machine 2 on the workbench 1, a support plate 3 fixedly connected to the workbench 1, a rotating shaft 4 rotatably connected to the outer surface of the support plate 3, a connecting plate 5 fixedly connected to the outer surface of the rotating shaft 4, a mounting block 6 fixedly connected to the front end of the connecting plate 5, a positioning pin 7 detachably connected to the mounting block 6, a motor 8 fixedly connected to the workbench 1, a bidirectional lead screw 9 fixedly connected to the output end of the motor 8, a threaded block 10 threadedly connected to the bidirectional lead screw 9, a connecting rod 11 rotatably connected to the outer surface of the threaded block 10, a movable clamping plate 12 rotatably connected to the other end of the connecting rod 11, a fixed clamping plate 13 fixedly connected to the workbench 1, and a baffle 14 fixedly connected to the upper surface of the movable clamping plate 12 to prevent debris from falling backward and protect the lead screw connection structure.

[0021] Specifically, the movable clamping plate 12 is movably connected to the fixed clamping plate 13, and a slider 16 is fixedly connected to the lower surface of the movable clamping plate 12.

[0022] Furthermore, a slide groove 15 is provided on the worktable 1, which is slidably connected to the slider 16 to limit the linear movement of the movable clamp 12.

[0023] Furthermore, a laser light 18 is installed on the workbench 1, and the position illuminated by the laser light 18 is the position where the positioning pin 7 is nailed.

[0024] It is worth noting that a handle is fixedly connected to the outer surface of the mounting block 6, and the handle is provided with anti-slip texture.

[0025] It is worth noting that slide bars 17 are provided on both sides of the bidirectional lead screw 9, and the threaded block 10 is slidably connected to the slide bars 17 to prevent the threaded block 10 from rotating.

[0026] It is worth mentioning that the mounting block 6 is provided with a slot, and a spring ball is provided in the slot.

[0027] It is worth emphasizing that the upper surface of the positioning pin 7 is fixedly connected with four corner blocks, and the four corner blocks are provided with hemispherical grooves. The positioning pin 7 is installed on the mounting block 6 through the hemispherical grooves and spring ball bearings, which is used to install the positioning pin 7 by snap-fit.

[0028] Among them, the drilling machine 2 and the motor 8 are existing technologies and will not be described in detail; at the same time, this utility model also includes a power supply, a controller, and a switch, which are not the main technical points of this patent and will not be described in detail; the "front, back, left, and right" perspectives of this device are as follows: Figure 1 The direction shown in the diagram is the reference.

[0029] Working principle: In use, first place the connecting rod under the positioning pin 7, then align the position to be drilled with the irradiation position of the laser lamp 18, then hold the mounting block 6 with the handle, and then forcefully push the connecting plate 5 downward. The connecting plate 5 rotates through the rotating shaft 4 and drives the positioning pin 7 to press down, pre-drilling a small hole at the drilling position through the positioning pin 7. Then place the connecting rod on the fixed clamping plate 13, and then the motor 8 drives the bidirectional lead screw 9 to rotate. The two threaded blocks 10 move in opposite directions in a straight line through the action of the threads, so that the two threaded blocks 10 move closer to each other, making the angle of the connecting rod 11 smaller and the connecting rod 11 straight. The connecting rod 11 pushes the movable clamping plate 12 closer to the fixed clamping plate 13. The movable clamping plate 12 and the fixed clamping plate 13 clamp and fix the connecting rod, and then the drilling machine 2 performs the drilling operation.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An engine connecting rod production hole-opening device, comprising a worktable (1), characterized in that: A drilling machine (2) is provided on the workbench (1). A support plate (3) is fixedly connected to the workbench (1). A rotating shaft (4) is rotatably connected to the outer surface of the support plate (3). A connecting plate (5) is fixedly connected to the outer surface of the rotating shaft (4). An installation block (6) is fixedly connected to the front end of the connecting plate (5). A positioning pin (7) is detachably connected to the installation block (6). A motor (8) is fixedly connected to the workbench (1). A two-way lead screw (9) is fixedly connected to the output end of the motor (8). A threaded block (10) is threadedly connected to the two-way lead screw (9). A connecting rod (11) is rotatably connected to the outer surface of the threaded block (10). A movable clamping plate (12) is rotatably connected to the other end of the connecting rod (11). A fixed clamping plate (13) is fixedly connected to the workbench (1). A baffle (14) is fixedly connected to the upper surface of the movable clamping plate (12).

2. The engine connecting rod production hole-opening device according to claim 1, characterized in that: The movable clamp (12) is movably connected to the fixed clamp (13), and a slider (16) is fixedly connected to the lower surface of the movable clamp (12).

3. The engine connecting rod production hole-opening device according to claim 1, characterized in that: The workbench (1) is provided with a slide groove (15), which is slidably connected to the slider (16).

4. The engine connecting rod production hole-opening device according to claim 1, characterized in that: A laser light (18) is provided on the workbench (1).

5. The engine connecting rod production hole-opening device according to claim 1, characterized in that: A handle is fixedly connected to the outer surface of the mounting block (6), and the handle is provided with anti-slip texture.

6. The engine connecting rod production hole-opening device according to claim 1, characterized in that: The two-way lead screw (9) is provided with slide rods (17) on both sides, and the threaded block (10) is slidably connected to the slide rods (17).

7. The engine connecting rod production hole-opening device according to claim 1, characterized in that: The mounting block (6) is provided with a slot, and a spring ball is provided in the slot.

8. The engine connecting rod production hole-opening device according to claim 1, characterized in that: The upper surface of the positioning pin (7) is fixedly connected to a four-corner block, and a hemispherical groove is provided on the four-corner block. The positioning pin (7) is installed on the mounting block (6) through the hemispherical groove and the spring ball.

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