Crankshaft comprehensive testing fixture with offset automatic correction function

Abstract

The utility model discloses a comprehensive testing fixture of crankshaft with offset automatic correction function belongs to crankshaft testing fixture technical field, including the fixed frame, the fixed frame is fixed with the detection frame, installs the fusion detection subassembly in the detection frame, the both sides fixed with the baffle and fixed box on the fixed frame, in the utility model, through the both ends extruding top block of crankshaft, and the sliding bar is moved to the fixed cylinder inside under the driving of top block, and the spring in fixed cylinder is compressed to sliding block, and the articulated seat linkage support rod is made to move top block, and the articulated rod of two sides is rotated around the pin shaft on the support seat under the pushing of support rod, and two articulated rods drive the clamping plate to gather to the inboard side simultaneously, until the clamping plate and the crankshaft surface close adhesion, in the process of four clamping plates on the same side approaching each other, can slowly push the end of crankshaft to the center of top block, thus in the process of locking the end of crankshaft, dynamic correction offset, realize the automatic centering clamping purpose of crankshaft, prevent the end of crankshaft offset and influence detection accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of crankshaft inspection tool technology, and in particular relates to a comprehensive crankshaft inspection tool with automatic offset correction function. Background Technology

[0002] As a key component that converts linear motion into rotational motion, crankshafts are widely used in automobile engines, marine power systems, general machinery and other fields. To improve product accuracy, comprehensive inspection tools are used to inspect crankshafts.

[0003] Existing inspection fixtures use two-end center hole supports or double-center clamping to fix the two ends of the crankshaft during the inspection process to improve the subsequent inspection accuracy. However, this only achieves preliminary positioning and is difficult to dynamically correct for offset during the locking process. If the inspection table is disturbed by vibration or the crankshaft itself is unbalanced and generates centrifugal force, the already positioned horizontal position is prone to shift, requiring the machine to be stopped for adjustment, which affects the inspection efficiency and accuracy. In order to solve the above problems, there is an urgent need for a crankshaft integrated inspection fixture with automatic offset correction function. Summary of the Invention

[0004] The purpose of this utility model is to solve the problem that fixing the two ends of the crankshaft by using the two-end center hole support or double-center clamping can only achieve preliminary positioning and it is difficult to dynamically correct the offset during the locking process. If the inspection table is disturbed by vibration or the crankshaft itself is unbalanced and generates centrifugal force, the positioned horizontal position is prone to offset. Therefore, a crankshaft comprehensive inspection tool with automatic offset correction function is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A crankshaft integrated inspection fixture with automatic offset correction function includes: a fixed frame, a detection frame fixed on the fixed frame, a fusion detection component installed in the detection frame, baffles and a fixed box fixed on both sides of the fixed frame respectively, a slide block sliding inside the fixed box, support bearings respectively engaged in the baffles and slide blocks, a fixed cylinder sleeved inside the support bearings, a support base fixed to one end of the fixed cylinder, and hinge rods rotatably connected to the four corners of the support base via pins. The other ends of two hinge rods are rotatably connected to clamps via pins, and the middle of the inner hinge rods is open... Four support rods are rotatably connected via pins. Each of the four support rods has a support assembly rotatably connected to one end of each rod via a pin. Each support assembly includes a top block. A slide rod is fixed to the side of the top block near the support base. A hinge seat is fixed to the middle of the slide rod. The hinge seat is rotatably connected to the end of the support rod via a pin. The other end of the slide rod passes through the support base and is fixed to a slider. The slider is slidably connected inside a fixed cylinder. A drive assembly is fixed to the end of the fixed cylinder in the baffle. An adjustment assembly is installed in the slide base. One end of the adjustment assembly passes through the fixed box and is fixed to a turntable.

[0006] As a further description of the above technical solution: A spring is fixed inside the fixed cylinder. One end of the spring is fixed to the slider, and the other end of the spring is fixedly connected to one side of the inner wall of the fixed cylinder.

[0007] As a further description of the above technical solution: The fusion detection component consists of a non-contact laser probe and a visual image sensing module, and is located directly above the detection frame.

[0008] As a further description of the above technical solution: The drive assembly includes a motor, which is mounted on one side of the baffle. A drive wheel is fixed on the output shaft of the motor. A belt is fitted around the drive wheel. A driven wheel is connected to the drive wheel via the belt. One side of the driven wheel is fixed to the end of a fixed cylinder in the baffle.

[0009] As a further description of the above technical solution: The adjusting assembly includes a lead screw, one end of which is fitted with a limit bearing. The limit bearing is engaged inside the fixed box on one side. The lead screw is externally threaded with a nut, which is engaged in the middle of the slide block.

[0010] As a further description of the above technical solution: A through groove is provided on one side of the top of the fixed box, and two limiting rods slide through the slide block. The limiting rods are fixed to both sides of the inner wall of the fixed box.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. In this utility model, the sliding block is moved to the left inside the fixed box by operating the adjustment component. During the process of the crankshaft pressing the top block at both ends, the top block drives the sliding rod to move into the fixed cylinder. The sliding block compresses the spring in the fixed cylinder. At the same time, the movement of the top block causes the hinge seat to link with the support rod. The support rod pushes the hinge rods on both sides to rotate around the pin on the support seat. The two sets of hinge rods drive the clamping plates to move inward synchronously until the clamping plates are tightly attached to the surface of the crankshaft. During the process of the four clamping plates on the same side approaching each other, the end of the crankshaft can be slowly pushed to the center of the top block. Therefore, during the process of locking the end of the crankshaft, the offset is dynamically corrected, and the purpose of automatic centering and clamping of the crankshaft is achieved, preventing the end of the crankshaft from offset from affecting the detection accuracy.

[0012] 2. In this utility model, the left end of the crankshaft component first contacts the top block in the left support assembly, and then the right end of the crankshaft component is aligned with the top block in the right support assembly. Next, the turntable is rotated to drive the adjustment assembly to operate. The lead screw rotates under the support of the limit bearing. Through the threaded engagement of the nut and the lead screw, the slide block slides along the limit rod in the fixed box. At the same time, the slide block drives the right fixed cylinder to move to the left, adjusting the distance between the slide block and the baffle to adapt to crankshafts of different lengths. When the crankshaft component is removed, the turntable is rotated in the opposite direction, so that the lead screw drives the slide block to move to the right through the limit bearing, so that the top block on the right side gradually moves away from the end of the crankshaft, releasing the locking state of the end of the crankshaft. Then, with the help of the elastic force, the slide rod drives the top block to extend, so that the top block and the clamping plate can return to the initial position, so as to facilitate the next positioning work of the crankshaft. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a crankshaft integrated inspection fixture with automatic offset correction function proposed in this utility model; Figure 2 This is a schematic diagram of the baffle of a crankshaft integrated inspection fixture with automatic offset correction function proposed in this utility model; Figure 3 This is a structural schematic diagram of the fixed box of a crankshaft integrated inspection fixture with automatic offset correction function proposed in this utility model; Figure 4 This is a schematic diagram of the fixed cylinder and support base of a crankshaft integrated inspection fixture with automatic offset correction function proposed in this utility model. Figure 5 This is a structural schematic diagram of the fixed cylinder section of a crankshaft integrated inspection fixture with automatic offset correction function proposed in this utility model.

[0014] Legend: 1. Fixing frame; 2. Detection frame; 3. Fusion detection assembly; 4. Baffle; 5. Fixing box; 6. Slide; 7. Support bearing; 8. Fixing cylinder; 9. Support seat; 10. Hinge rod; 11. Clamping plate; 12. Support rod; 13. Support assembly; 131. Top block; 132. Slide rod; 133. Hinge seat; 134. Slider; 135. Spring; 14. Through slot; 15. Drive assembly; 151. Motor; 152. Drive wheel; 153. Belt; 154. Driven wheel; 16. Adjustment assembly; 161. Lead screw; 162. Limit bearing; 163. Nut; 17. Turntable; 18. Limit rod. Detailed Implementation

[0015] The utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are only descriptive and are not limiting of the scope of protection of this utility model.

[0016] In its specific implementation, such as Figures 1-5 This utility model provides a technical solution: A crankshaft integrated inspection fixture with automatic offset correction function includes: a fixed frame 1, a detection frame 2 fixed on the fixed frame 1, and a fusion detection component 3 installed in the detection frame 2. The fusion detection component 3 consists of a non-contact laser probe and a visual image sensing module, and is located directly above the detection frame 2. During the crankshaft rotation, the laser probe collects geometric parameter data such as crankshaft radial runout and cylindricity in real time, and the visual image sensing module simultaneously captures the crankshaft surface morphology and position offset information relative to the reference. The two sets of detection data are transmitted to the control system in real time for comprehensive analysis to accurately determine whether the crankshaft has an offset and the amount and direction of the offset. A baffle 4 and a fixed box 5 are fixed on both sides of the fixed frame 1, respectively. A slide block 6 slides inside the fixed box 5. A support bearing 7 is snapped into the baffle 4 and the slide block 6, respectively. A fixed cylinder 8 is sleeved inside the support bearing 7. A support base 9 is fixed to one end of the fixed cylinder 8. The four corners of the support base 9 are rotatably connected to hinge rods 10 by pins. The other ends of two hinge rods 10 are rotatably connected to clamps 11 by pins. The middle of the inner hinge rods 10 is rotatably connected to support rods 12 by pins. The ends of the four support rods 12 that are close to each other are respectively connected to... A support assembly 13 is rotatably connected via a pin. The support assembly 13 includes a top block 131. A slide rod 132 is fixed to the side of the top block 131 near the support seat 9. A hinge seat 133 is fixed to the middle of the slide rod 132. The hinge seat 133 is rotatably connected to the end of the support rod 12 via a pin. When the top block 131 moves, the hinge seat 133 is linked to the support rod 12. The support rod 12 pushes the hinge rods 10 on both sides to rotate around the pin on the support seat 9. The two sets of hinge rods 10 drive the clamping plate 11 to retract inward synchronously, improving the stability of clamping the crankshaft end. The other end of the slide rod 132 passes through the support seat 9 and is fixed with a slider 134. The slider 134 is slidably connected inside the fixed cylinder 8. A spring 135 is fixed inside the fixed cylinder 8. One end of the spring 135 is fixed to the slider 134, and the other end of the spring 135 is fixedly connected to one side of the inner wall of the fixed cylinder 8. The top block 131 on the right side gradually moves away from the crankshaft end, releasing the locking state of the crankshaft end. Then, with the help of the elastic force, the top block 131 is extended through the slide rod 132, so that the top block 131 and the clamping plate 11 can return to the initial position, so as to facilitate the next positioning work of the crankshaft. A drive assembly 15 is fixed to the end of the fixed cylinder 8 in the baffle 4. The drive assembly 15 includes a motor 151, which is mounted on one side of the baffle 4. A drive wheel 152 is fixed on the output shaft of the motor 151. A belt 153 is sleeved on the drive wheel 152. The drive wheel 152 is connected to a driven wheel 154 through the belt 153. One side of the driven wheel 154 is fixed to the end of the fixed cylinder 8 in the baffle 4. The drive wheel 152 drives the driven wheel 154 to rotate through the belt 153. The driven wheel 154 drives the fixed cylinder 8 in the baffle 4 to rotate. Since the crankshaft is clamped between the two top blocks 131, it drives the crankshaft to rotate synchronously and uniformly with the fixed cylinder 8. The fusion detection assembly 3 on the detection frame 2 is located directly above the crankshaft, which can detect the crankshaft while it is rotating, thereby improving detection efficiency and effect. An adjustment component 16 is installed in the slide 6. One end of the adjustment component 16 passes through the fixed box 5 and is fixed with a turntable 17. The adjustment component 16 includes a lead screw 161. One end of the lead screw 161 is sleeved with a limit bearing 162. The limit bearing 162 is snapped into one side inside the fixed box 5. The lead screw 161 is externally threaded with a nut 163. The nut 163 is snapped into the middle of the slide 6. Through the threaded engagement between the nut 163 and the lead screw 161, the slide 6 is driven to slide along the inside of the fixed box 5. At the same time, the slide 6 drives the right fixed cylinder 8 to move to the left, adjusting the distance between the slide 6 and the baffle 4 to adapt to crankshafts of different lengths.

[0017] A through groove 14 is provided on one side of the top of the fixed box 5. Two limiting rods 18 slide through the slide 6. The limiting rods 18 are fixed on both sides of the inner wall of the fixed box 5. The through groove 14 provides movement space for multiple clamping plates 11 on the right side. The slide 6 slides along the limiting rods 18 in the fixed box 5. The limiting rods 18 support and guide the slide 6, improving the stability of the slide 6 driving the fixed cylinder 8 to move horizontally.

[0018] Working principle: The crankshaft component to be tested is placed between two support components 13. The left end of the crankshaft component first contacts the top block 131 in the left support component 13, and then the right end of the crankshaft component is aligned with the top block 131 in the right support component 13. Next, the turntable 17 is rotated to drive the adjustment component 16 to operate. The lead screw 161 rotates under the support of the limit bearing 162. Through the threaded engagement of the nut 163 and the lead screw 161, the slide 6 is driven to slide along the limit rod 18 in the fixed box 5. At the same time, the slide 6 drives the right fixed cylinder 8 to move to the left, adjusting the distance between the slide 6 and the baffle 4 to adapt to crankshafts of different lengths. During the process of pressing the top block 131 at both ends of the crankshaft, the top block 131 drives the slide rod 132 to move into the fixed cylinder 8, the slider 134 compresses the spring 135 in the fixed cylinder 8, and at the same time, the movement of the top block 131 causes the hinge seat 133 to link with the support rod 12, the support rod 12 pushes the hinge rods 10 on both sides to rotate around the pin on the support seat 9, and the two sets of hinge rods 10 drive the clamping plates 11 to move inward synchronously until the clamping plates 11 are tightly attached to the surface of the crankshaft. During the process of the four clamping plates 11 on the same side approaching each other, the end of the crankshaft can be slowly pushed to the center of the top block 131. The motor 151 in the drive assembly 15 is started. The output shaft of the motor 151 drives the drive wheel 152 to rotate. The drive wheel 152 drives the driven wheel 154 to rotate through the belt 153. The driven wheel 154 drives the fixed cylinder 8 in the baffle 4 to rotate. Since the crankshaft is clamped between the two top blocks 131, the crankshaft is driven to rotate synchronously and uniformly with the fixed cylinder 8. The fusion detection assembly 3 on the detection frame 2 is located directly above the crankshaft. During the rotation of the crankshaft, the laser probe collects geometric parameter data such as the radial runout and cylindricity of the crankshaft in real time. The visual image sensing module simultaneously captures the surface morphology of the crankshaft and the positional offset information relative to the reference. The two sets of detection data are transmitted to the control system in real time for comprehensive analysis to accurately determine whether the crankshaft has an offset and the amount and direction of the offset.

[0019] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A crankshaft integrated inspection fixture with automatic offset correction function, characterized in that, include: A fixed frame (1) is fixed with a detection frame (2). A fusion detection component (3) is installed in the detection frame (2). A baffle (4) and a fixed box (5) are fixed on both sides of the fixed frame (1). A slide (6) slides inside the fixed box (5). A support bearing (7) is snapped into the baffle (4) and the slide (6). A fixed cylinder (8) is sleeved inside the support bearing (7). A support base (9) is fixed at one end of the fixed cylinder (8). The four corners of the support base (9) are rotatably connected to hinge rods (10) by pins. The other ends of the two hinge rods (10) are rotatably connected to clamps (11) by pins. A support rod (12) is rotatably connected to the middle of the inner hinge rod (10) by pins. The four support rods (12) are mutually connected. One end of each component is rotatably connected to a support assembly (13) via a pin. The support assembly (13) includes a top block (131). A slide rod (132) is fixed to the side of the top block (131) near the support base (9). A hinge seat (133) is fixed to the middle of the slide rod (132). The hinge seat (133) is rotatably connected to the end of the support rod (12) via a pin. The other end of the slide rod (132) passes through the support base (9) and is fixed with a slider (134). The slider (134) is slidably connected inside the fixed cylinder (8). A drive assembly (15) is fixed to the end of the fixed cylinder (8) in the baffle (4). An adjustment assembly (16) is installed in the slide (6). One end of the adjustment assembly (16) passes through the fixed box (5) and is fixed with a turntable (17).

2. The crankshaft integrated inspection fixture with automatic offset correction function according to claim 1, characterized in that, A spring (135) is fixed inside the fixed cylinder (8). One end of the spring (135) is fixed to the slider (134), and the other end of the spring (135) is fixedly connected to one side of the inner wall of the fixed cylinder (8).

3. A crankshaft integrated inspection fixture with automatic offset correction function according to claim 1, characterized in that, The fusion detection component (3) consists of a non-contact laser probe and a visual image sensing module, and is located directly above the detection frame (2).

4. A crankshaft integrated inspection fixture with automatic offset correction function according to claim 1, characterized in that, The drive assembly (15) includes a motor (151), which is mounted on one side of the baffle (4). A drive wheel (152) is fixed on the output shaft of the motor (151). A belt (153) is attached to the drive wheel (152). A driven wheel (154) is connected to the drive wheel (152) via the belt (153). One side of the driven wheel (154) is fixed to the end of the fixed cylinder (8) in the baffle (4).

5. A crankshaft integrated inspection fixture with automatic offset correction function according to claim 1, characterized in that, The adjusting assembly (16) includes a lead screw (161), one end of which is fitted with a limit bearing (162), which is snapped into one side inside the fixed box (5). The lead screw (161) is externally threaded with a nut (163), which is snapped into the middle of the slide block (6).

6. A crankshaft integrated inspection fixture with automatic offset correction function according to claim 5, characterized in that, A through groove (14) is provided on one side of the top of the fixed box (5), and two limiting rods (18) slide through the slide (6). The limiting rods (18) are fixed on both sides of the inner wall of the fixed box (5).

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