A positioning fixture for machining automotive connecting rods

Abstract

This utility model provides a positioning fixture for machining automotive connecting rods, belonging to the field of positioning fixture technology. It includes a support frame with a machining table rotatably mounted inside. The machining table has mounting slots at its top and bottom, and each mounting slot contains a positioning component. Each positioning component includes a positioning plate, the outer wall of which has a positioning groove for placing the automotive connecting rod. Two symmetrically distributed positioning holes are provided on one side of each positioning plate, communicating with fixing holes on the automotive connecting rod. Each positioning hole contains a positioning rod. This utility model, by providing detachable positioning plates at the top and bottom of the machining table, facilitates cleaning and replacement. A drive mechanism automatically locks the automotive connecting rod with the positioning rod, ensuring reliable machining positioning and preventing accuracy loss due to displacement. Simultaneously, a motor drives the machining table to rotate, switching the position of the positioning plates to achieve automated unloading, significantly improving machining efficiency.

Description

Technical Field

[0001] This utility model relates to the field of positioning tooling technology, and in particular to a positioning tooling for machining automotive connecting rods. Background Technology

[0002] The connecting rod is a crucial component connecting the piston and crankshaft of an automotive engine. Its primary function is to convert the reciprocating linear motion of the piston into the rotational motion of the crankshaft, thereby transmitting power. An automotive connecting rod typically consists of the connecting rod body, connecting rod big end cap, connecting rod small end bushing, connecting rod big end bearing, and connecting rod bolts (or screws). Automotive connecting rods require high precision in machining; therefore, appropriate positioning fixtures are used to avoid instability during processing and meet these precision requirements.

[0003] For example, in the prior art disclosure number CN219293382U, an automotive connecting rod machining positioning fixture is used. This prior art fixes the machining base in a suitable place through mounting holes. By pulling the handle upward, the fixing rod can be disengaged from the slot. The angle of the machining positioning plate can be adjusted as needed, which is flexible. Then, by rotating the handle, the threaded rod is rotated, which in turn moves the movable block to the center, thereby allowing the first arc-shaped fixing plate to clamp and fix the automotive connecting rod.

[0004] To improve stability, existing automotive connecting rod machining positioning fixtures are equipped with multiple positioning structures for fixation. While this improves stability, it also makes the assembly and disassembly of automotive connecting rods time-consuming and labor-intensive. Workers have to wait for the current connecting rod to be completed before removing it and repositioning it, which seriously reduces the overall machining efficiency. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a positioning fixture for machining automotive connecting rods. By setting detachable positioning plates at the top and bottom of the machining table, it is easy to clean and replace. At the same time, the machining table is driven by a motor to rotate and switch the position of the positioning plates, realizing automated unloading and significantly improving machining efficiency, so as to solve the problems mentioned in the background art.

[0006] This utility model provides a positioning fixture for machining automotive connecting rods, including a support frame. A machining table is rotatably mounted inside the support frame. The machining table has mounting slots at its top and bottom, and each mounting slot contains a positioning component. The positioning component includes a positioning plate. The outer wall of the positioning plate has a positioning groove for placing the automotive connecting rod. Each of the two positioning plates has two symmetrically distributed positioning holes on one side, which are connected to fixing holes on the automotive connecting rod. Each positioning hole contains a positioning rod. The top and bottom of the machining table are provided with a drive mechanism for moving the positioning rod.

[0007] In one embodiment, positioning posts are fixedly provided at the top and bottom of the processing table for positioning the automotive connecting rod, thereby further improving the stability of the automotive connecting rod.

[0008] In one embodiment, the processing table is provided with grooves at both the top and bottom, and the driving mechanism includes two sliders, which are respectively disposed in the two grooves, and the sliders are fixed to the positioning rod.

[0009] In one embodiment, the processing table is provided with two vertically distributed first electric push rods. One end of the piston rod of each of the two first electric push rods is fixed to a slider. The sliders are driven to move by the first electric push rods, thereby improving the stability of the automotive connecting rod.

[0010] In one embodiment, a baffle is fixedly provided on the side of each slider away from the positioning plate. The baffle is located outside the slide groove and contacts the outer wall of the processing table. The baffle covers the top of the slide groove and can prevent the debris generated during processing from falling into the slide groove and obstructing the movement of the slider.

[0011] In one embodiment, two symmetrically distributed fixing slots are provided on both the front and rear sides of the processing table. A second electric push rod is fixedly installed inside each fixing slot. An insert block is fixedly installed on the piston rod of each second electric push rod. Slots that are compatible with the insert blocks are provided on both the front and rear sides of the positioning plate. The insert blocks are inserted into the slots to fix the positioning plate by means of insertion, which facilitates quick disassembly of the positioning plate for cleaning and replacement.

[0012] In one embodiment, rotating rods are fixed on both sides of the processing table. One end of each rotating rod passes through the support frame and extends to the outside of the support frame. The rotating rods support the processing table to rotate inside the support frame, thereby realizing the rotational adjustment of the two positioning plates.

[0013] In one embodiment, a support base is fixedly provided on one side of the support frame, and a motor is fixedly provided on the top of the support base. One end of the output shaft of the motor is fixed to one of the rotating rods through a brake. The motor drives the processing table to rotate, thereby improving the processing efficiency of automotive connecting rods.

[0014] The beneficial effects of this utility model are as follows: This invention features detachable positioning plates at the top and bottom of the processing table, facilitating cleaning and replacement. A drive mechanism automatically locks the automotive connecting rod, ensuring reliable positioning during processing and effectively preventing a decrease in processing accuracy due to displacement. Furthermore, by rotating the processing table via a motor to switch the positions of the two positioning plates, the processed automotive connecting rod automatically detaches into the support frame, achieving automated unloading and significantly improving the processing efficiency of automotive connecting rods. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the processing table of this utility model; Figure 3 This is a cross-sectional view of the processing table of this utility model; Figure 4 This is a side view of the positioning plate of this utility model; Figure 5 This is a bottom view of the positioning plate of this utility model.

[0016] In the picture: 1-Support frame; 2-Processing table; 3-Mounting slot; 4-Positioning assembly; 401-Positioning plate; 402-Positioning groove; 403-Positioning hole; 404-Positioning rod; 5-Drive mechanism; 501-Slider; 502-First electric push rod; 503-Baffle; 6-Positioning pin; 7-Slide groove; 8-Fixing groove; 9-Second electric push rod; 10-Insertion block; 11-Slot; 12-Rotating rod; 13-Support base; 14-Motor; 15-Brake. Detailed Implementation

[0017] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0018] This utility model provides a positioning fixture for machining automotive connecting rods, such as... Figures 1-5 As shown, the system includes a support frame 1, inside which a processing table 2 is rotatably mounted. The processing table 2 has mounting grooves 3 at its top and bottom. Each of the two mounting grooves 3 has a positioning component 4. The positioning component 4 includes a positioning plate 401. The outer wall of the positioning plate 401 has a positioning groove 402 for placing the car connecting rod. Each of the two positioning plates 401 has two symmetrically distributed positioning holes 403 on one side. The positioning holes 403 are connected to the fixing holes on the car connecting rod. Each positioning hole 403 has a positioning rod 404.

[0019] The processing table 2 is provided with sliding grooves 7 at both the top and bottom. The processing table 2 is also provided with driving mechanisms 5 at both the top and bottom for moving the positioning rod 404. The driving mechanism 5 includes two sliders 501, which are respectively located in the two sliding grooves 7. The sliders 501 are fixed to the positioning rod 404. The processing table 2 is provided with two first electric push rods 502 distributed vertically inside. One end of the piston rod of the two first electric push rods 502 is fixed to the two sliders 501 respectively.

[0020] The processing table 2 is fixedly equipped with positioning posts 6 at both the top and bottom for positioning the automotive connecting rod, thereby further improving the stability of the automotive connecting rod.

[0021] The processing table 2 has two symmetrically distributed fixing slots 8 on both the front and rear sides. Each fixing slot 8 has a second electric push rod 9 fixed inside. Each second electric push rod 9 has a plug block 10 fixed on its piston rod. The positioning plate 401 has slots 11 on both the front and rear sides that are compatible with the plug block 10. The plug block 10 is inserted into the slot 11 to fix the positioning plate 401. This insertion method facilitates quick disassembly of the positioning plate 401 for cleaning and replacement.

[0022] Both the first electric actuator 502 and the second electric actuator 9 mentioned above can be stepper motor trapezoidal screw electric actuators. The core configuration of this type of electric actuator is: stepper motor + trapezoidal screw + limit switch / potential meter. It has a built-in self-locking function, eliminating the need for additional braking and quantitative adjustment functions. After stopping, it can stably maintain its position, preventing the load from slipping or shifting.

[0023] like Figure 1 and Figure 2 As shown, rotating rods 12 are fixed on both sides of the processing table 2. One end of the rotating rod 12 passes through the support frame 1 and extends to the outside of the support frame 1. A support base 13 is fixed on one side of the support frame 1. A motor 14 is fixed on the top of the support base 13. One end of the output shaft of the motor 14 is fixed to one of the rotating rods 12 through a brake 15. The motor 14 can be a servo motor with a built-in encoder. This servo motor can detect the actual rotation angle and speed in real time, thereby achieving precise control of the rotation angle of the processing table 2. The brake 15 can make the motor 14 stop quickly and stably at the specified position, avoiding positioning deviation caused by inertia, and further ensuring processing or operation accuracy.

[0024] In the actual processing, the operator first places the car connecting rod to be processed into the corresponding positioning groove 402 on the positioning plate 401, and then installs the entire positioning plate 401 into the mounting groove 3. At this time, multiple second electric push rods 9 are used to drive the connected inserts 10 to insert into the corresponding slots 11, completing the automatic locking of the positioning plate 401. Then, the first electric push rod 502 pushes the slider 501 to move, driving the positioning rod 404 to insert into the fixing hole and the positioning hole 403, realizing the reliable fixing of the car connecting rod and effectively preventing the processing accuracy from being affected by the displacement of the workpiece during the processing. After processing, the motor 14 is started to drive the rotating rod 12 and the processing table 2 to rotate, so that the processed car connecting rod is rotated to the lower position. Then, the first electric push rod 502 is used to drive the slider 501 to move back, so that the positioning rod 404 is removed from the fixing hole. At the same time, the second electric push rod 9 is used to drive the insert block 10 to retract from the slot 11, and the positioning plate 401 is unlocked. The processed car connecting rod automatically falls into the support frame 1, realizing automated unloading. Finally, the operator inserts the positioning plate 401 containing the car connecting rod to be processed into the mounting slot 3 to complete the loading, which significantly improves the processing efficiency of the car connecting rod.

[0025] like Figure 1 and Figure 2 As shown, baffles 503 are fixedly provided on the side of each slider 501 away from the positioning plate 401. The baffles 503 are located on the outside of the slide groove 7 and contact the outer wall of the processing table 2. When the positioning rod 404 is inserted into the fixing hole, the baffles 503 cover the slide groove 7, which can prevent the processing debris from falling into the slide groove 7 and obstructing the movement of the slider 501.

[0026] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A positioning fixture for machining automotive connecting rods, characterized in that, The support frame (1) is rotatably provided inside the support frame (1). The processing table (2) is provided at the top and bottom of the processing table (2). The two installation slots (3) are provided inside the two installation slots (3). The positioning component (4) includes a positioning plate (401). The outer wall of the positioning plate (401) is provided with a positioning slot (402) for placing the car connecting rod. Two symmetrically distributed positioning holes (403) are provided on one side of each of the two positioning plates (401). The positioning holes (403) are connected to the fixing holes on the connecting rod of the automobile. Each positioning hole (403) is provided with a positioning rod (404). The top and bottom of the processing table (2) are provided with a drive mechanism (5) for driving the positioning rod (404) to move.

2. The automotive connecting rod machining positioning fixture according to claim 1, characterized in that, The processing table (2) is fixed with positioning columns (6) at the top and bottom for positioning the automobile connecting rod.

3. The automotive connecting rod machining positioning fixture according to claim 1, characterized in that, The processing table (2) is provided with slide grooves (7) at the top and bottom. The driving mechanism (5) includes two sliders (501), which are respectively located in the two slide grooves (7). The sliders (501) are fixed to the positioning rod (404).

4. The automotive connecting rod machining positioning fixture according to claim 3, characterized in that, The processing table (2) is equipped with two first electric push rods (502) distributed vertically inside. One end of the piston rod of the two first electric push rods (502) is fixed to the two sliders (501) respectively.

5. The automotive connecting rod machining positioning fixture according to claim 3, characterized in that, Both sliders (501) are fixedly provided with baffles (503) on the side away from the positioning plate (401). The baffles (503) are located on the outside of the slide groove (7) and in contact with the outer wall of the processing table (2).

6. The automotive connecting rod machining positioning fixture according to claim 1, characterized in that, The processing table (2) has two symmetrically distributed fixed slots (8) on both the front and rear sides. Each fixed slot (8) is equipped with a second electric push rod (9). Each second electric push rod (9) has a piston rod equipped with a plug (10). The positioning plate (401) has slots (11) on both the front and rear sides that are compatible with the plug (10). The plug (10) is inserted into the slot (11).

7. The automotive connecting rod machining positioning fixture according to claim 1, characterized in that, The processing table (2) is fixed with rotating rods (12) on both sides. One end of the rotating rod (12) passes through the support frame (1) and extends to the outside of the support frame (1).

8. The automotive connecting rod machining positioning fixture according to claim 7, characterized in that, The support frame (1) is fixedly provided with a support base (13) on one side, and a motor (14) is fixedly provided on the top of the support base (13). One end of the output shaft of the motor (14) is fixed to one of the rotating rods (12) through a brake (15).

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