Full-automatic flexible assembly line for air conditioner compressor crankshaft

Abstract

The application discloses a kind of air conditioner compressor crankshafts full-automatic flexible assembly line.It relates to air conditioner compressor assembly technical field.The assembly line includes a plurality of assembly stations and oil circuit connectivity detection mechanism arranged in turn along the conveying direction, and a plurality of assembly stations include the flange press-fitting station for flange press-fitting on crankshaft, and oil circuit connectivity detection mechanism is arranged downstream of flange press-fitting station;Crankshaft is provided with oil hole, flange is provided with oil groove, and oil hole is communicated with oil groove when flange press-fitting is in place to form oil circuit;Oil circuit connectivity detection mechanism includes butt joint with one end of oil circuit sealed butt joint, detection medium supply unit for passing into detection medium to oil circuit and detection unit for detecting the flow state of detection medium, and whether oil hole and oil groove are in position and communicated is judged according to the flow state detected.The assembly line can verify oil circuit connectivity on line after press-fitting is completed, and timely find the crankshaft with oil hole and oil groove mispositioning, which is conducive to reducing repair cost.

Description

Technical Field

[0001] This invention belongs to the field of air conditioner compressor assembly technology, and in particular relates to a fully automatic flexible assembly line for air conditioner compressor crankshafts. Background Technology

[0002] The pump assembly of a rotary air conditioning compressor typically includes a crankshaft, cylinder, rollers, and upper and lower flanges. The crankshaft body has oil holes, and the inner wall of the flange has oil grooves. After the crankshaft body and flange are press-fitted into place, the oil holes and oil grooves align and connect, forming a lubrication path that supplies oil to the pump body.

[0003] On existing crankshaft assembly lines, flange press-fitting is a routine procedure. During press-fitting, the flange is fitted onto the end of the crankshaft body with an interference fit. If there is a circumferential angular misalignment between the flange and the crankshaft body, the oil hole outlet will be blocked by the flange body, preventing the oil hole and oil groove from aligning and connecting, thus blocking the lubrication oil passage. However, existing assembly lines do not perform online verification of the oil passage connectivity after flange press-fitting. The problem of misalignment between the oil hole and oil groove is usually only discovered after the compressor is fully assembled and enters the whole machine testing phase. At this point, the entire machine needs to be disassembled and reworked, which is costly and time-consuming.

[0004] In addition, existing technologies for testing crankshaft oil holes mostly involve offline inspection after machining, used to check the machining angle and position of the oil holes. The test object is a single crankshaft piece, which cannot cover the assembly alignment of the oil holes and oil grooves after flange press-fitting. Air tightness testing is mainly used to check the sealing performance of components or the whole machine, focusing on whether the test medium leaks from the tested object, rather than whether the oil circuit is aligned and connected. Summary of the Invention

[0005] This invention addresses the issue of how to verify online whether the crankshaft body oil hole and the flange oil groove are aligned and connected after the flange press-fit is completed, thereby promptly detecting and intercepting unqualified crankshafts with blocked oil circuits, and provides a fully automated flexible assembly line for air conditioning compressor crankshafts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automated flexible assembly line for air conditioning compressor crankshafts includes multiple assembly stations arranged sequentially along the conveying direction. Each assembly station includes a press-fit station for pressing flanges onto the crankshaft body. The crankshaft body has oil holes, and the flange has an oil groove inside. When the flange is press-fitted into place, the outlet of the oil hole aligns and connects with the oil groove to form an oil passage. The assembly line also includes an oil passage connectivity detection mechanism located downstream of the press-fit station. This mechanism includes a connector, a detection medium supply unit, and a detection unit. The connector is used for sealing and connecting with one end of the oil passage. The detection medium supply unit is connected to the connector and is used to introduce the detection medium into the oil passage. The detection unit detects the flow state of the detection medium within the oil passage. Based on the flow state detected by the detection unit, the oil passage connectivity detection mechanism determines whether the oil hole and oil groove are aligned and connected.

[0008] In one embodiment, the detection medium is either gas or oil. When the detection medium is gas, the detection unit includes a pressure detection element for detecting the gas pressure in the oil circuit. After gas is introduced into the oil circuit, the oil circuit connectivity detection mechanism determines whether the oil hole and the oil tank are aligned and connected based on whether the gas pressure or gas flow rate in the oil circuit reaches a predetermined state. When the detection medium is oil, the detection unit includes a flow detection element for detecting the oil flow rate in the oil circuit. After oil is introduced into the oil circuit, the oil circuit connectivity detection mechanism determines whether the oil hole and the oil tank are aligned and connected based on whether the oil can flow out of the oil circuit and whether the oil flow rate reaches a predetermined state.

[0009] In one embodiment, the assembly line also includes a non-conforming return mechanism, which is signal-connected to an oil circuit connectivity detection mechanism. This mechanism is used to send the crankshaft body along with the flange back to the press-fitting station for re-alignment and press-fitting when it is determined that the oil hole and oil groove are not aligned and connected.

[0010] In one embodiment, the press-fitting station is equipped with a circumferential alignment component, which is used to adjust the circumferential relative angle between the flange and the crankshaft body before repress-fitting, so that the outlet of the oil hole is aligned with the oil groove.

[0011] In one embodiment, the oil circuit connectivity detection mechanism is further provided with a rotary drive unit. When it is determined that the oil hole and the oil groove are not aligned and connected, the rotary drive unit drives the crankshaft body or flange to rotate circumferentially. During the rotation, the detection unit continuously detects the flow status of the detection medium and records the rotation angle corresponding to the smoothest flow of the detection medium as the alignment reference angle. The oil circuit connectivity detection mechanism sends the alignment reference angle to the press-fitting station. When re-pressing, the press-fitting station adjusts the circumferential relative angle between the flange and the crankshaft body according to the alignment reference angle so that the outlet of the oil hole is aligned with the oil groove before press-fitting.

[0012] In one embodiment, a seal is provided between the connector and one end of the oil passage. The seal is used to form a seal when the connector and one end of the oil passage are mated to prevent the detection medium from leaking from the mating point. The connector is connected to a drive member, which is used to drive the connector to move in a direction close to or away from the crankshaft body so that the connector and one end of the oil passage are mated or disengaged.

[0013] In one embodiment, the oil circuit connectivity detection mechanism further includes a determination unit, which is signal-connected to the detection unit and is used to output a connectivity determination result based on the flow status, and to associate and store the connectivity determination result with the identifier of the crankshaft body; the determination unit is also used to control the crankshaft body to be released to the next assembly station when the oil hole and oil groove are determined to be aligned and connected.

[0014] In one embodiment, the oil circuit connectivity detection mechanism is equipped with a type-change adjustment unit, which is used to adjust the position of the coupling and the detection parameters of the detection medium supply unit according to the model of the crankshaft body and the flange.

[0015] The present invention has the following beneficial effects:

[0016] 1. This invention uses an oil circuit connectivity detection mechanism located downstream of the press-fitting station to introduce a detection medium into the oil circuit after press-fitting and detect its flow status. This allows for online verification of whether the oil hole and oil groove are aligned and connected. This helps to detect unqualified crankshafts with blocked oil circuits in a timely manner during the press-fitting process and prevent them from flowing into subsequent processes, thereby reducing the cost of disassembling and repairing the entire machine.

[0017] 2. The present invention uses a non-conforming return mechanism to send the crankshaft body, along with the flange, that is determined to be misaligned and disconnected back to the press-fitting station for re-alignment and press-fitting, which helps to maintain continuous automated operation of the production line and reduce manual intervention.

[0018] 3. This invention uses a rotary drive unit to directly find the alignment reference angle at the detection station where the detection medium flows most smoothly, and sends this angle to the pressing station to re-press according to this angle. This helps to change the reflow treatment of defective crankshafts from trial-and-error repeated alignment to data-guided one-time alignment and pressing, shortening the rework cycle and reducing damage to the surface of parts caused by repeated pressing.

[0019] 4. This invention adjusts the joint position and detection parameters according to the machine model through the changeover adjustment unit, which is beneficial to realize flexible detection of crankshaft body and flange of different machine models and shorten the changeover adjustment time.

[0020] 5. The present invention associates and stores the connectivity determination result with the crankshaft body identifier through the determination unit, which is beneficial to realize the quality traceability of the test data and facilitates subsequent quality analysis and improvement.

[0021] 6. This invention uses gas as the detection medium for air blowing verification, which has the advantages of convenient medium acquisition and no residue after detection, and is conducive to realizing rapid online detection. When oil is used as the detection medium, the detection result directly reflects the actual lubrication medium's passing capacity. As an alternative implementation method, its detection effect still needs to be verified. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall layout of the assembly line;

[0023] Figure 2 This is an isometric schematic diagram of the oil circuit connectivity detection mechanism, showing its overall structure.

[0024] Figure 3 This is a cross-sectional schematic diagram of the oil circuit connectivity testing mechanism;

[0025] Figure 4 This is a partially enlarged schematic diagram showing the alignment relationship between the oil hole and the oil groove;

[0026] Figure 5 This is a flowchart of the oil circuit connectivity detection process.

[0027] In the diagram: 1. Pressing station; 2. Oil circuit connectivity testing mechanism; 3. Unqualified return mechanism; 4. Crankshaft body; 5. Flange; 6. Butt joint; 7. Testing medium supply unit; 8. Seal; 9. Drive component; 10. Oil hole; 11. Oil tank. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] like Figure 1 As shown, the fully automated flexible assembly line for the air conditioning compressor crankshaft of this application includes a conveying device and multiple assembly stations arranged sequentially along the conveying direction on the conveying device. The multiple assembly stations include at least a loading station, a pressing station 1, and a straightening station. The pressing station 1 is used to press the flange 5 onto the crankshaft body 4. Downstream of the pressing station 1, an oil circuit connectivity detection mechanism 2 is provided. The assembly line also has a non-conforming return mechanism 3, which is signal-connected to the oil circuit connectivity detection mechanism 2. This mechanism can return the crankshaft body 4, along with the flange 5, that is determined to be misaligned and not connected to the oil circuit to the pressing station 1 for re-alignment and pressing. The pressing station 1 is equipped with a circumferential alignment component, used to adjust the circumferential relative angle between the flange 5 and the crankshaft body 4 before re-pressing, so that the outlet of the oil hole 10 is aligned with the oil groove 11.

[0030] An oil hole 10 is provided inside the crankshaft body 4, and an oil groove 11 is provided inside the flange 5. When the flange 5 is press-fitted into place, the outlet of the oil hole 10 is aligned with the oil groove 11, and the two are connected to form a lubrication oil passage, through which lubricating oil can be transported to the mating surfaces of the crankshaft body 4 and the flange 5. If there is a circumferential relative angle deviation between the flange 5 and the crankshaft body 4 during press-fitting, the outlet of the oil hole 10 will be blocked by the body of the flange 5, and the oil hole 10 and the oil groove 11 will not be connected, thus blocking the lubrication oil passage.

[0031] like Figure 2 and Figure 3 As shown, the oil circuit connectivity detection mechanism 2 includes a connector 6, a detection medium supply unit 7, and a detection unit. The connector 6 is used for sealing and connecting with one end of the oil circuit. The detection medium supply unit 7 is connected to the connector 6 and is used to supply the detection medium to the oil circuit. The detection unit is used to detect the flow status of the detection medium in the oil circuit. A seal 8 is provided between the connector 6 and the crankshaft body 4. The seal 8 forms a seal when the connector 6 is connected to one end of the oil circuit, preventing the detection medium from leaking from the connection point and affecting the detection results. The connector 6 is connected to a drive unit 9, which drives the connector 6 to move in a direction closer to or away from the crankshaft body 4 to complete the docking or disengagement action.

[0032] During testing, the drive unit 9 pushes the connector 6 to align with and seal one end of the oil circuit. The testing medium supply unit 7 then introduces the testing medium into the oil circuit through the connector 6. If the oil hole 10 and the oil tank 11 are aligned and connected, the testing medium can pass through the oil circuit, and the flow state detected by the testing unit corresponds to "connected". If the oil hole 10 and the oil tank 11 are misaligned, the oil circuit is blocked, the testing medium cannot pass through, and the flow state detected by the testing unit corresponds to "not connected". The oil circuit connectivity testing mechanism 2 determines whether the oil hole 10 and the oil tank 11 are aligned and connected based on the detected flow state.

[0033] like Figure 4 As shown, the alignment between the outlet of oil hole 10 and oil tank 11 is the key to determining whether the connection is established: when flange 5 is pressed into place, the outlet of oil hole 10 is directly opposite oil tank 11, and the detection medium can flow from oil hole 10 into oil tank 11 and pass through the oil passage; if the two are misaligned, the oil passage is blocked by the flange 5 body at the outlet of oil hole 10, and the detection medium cannot pass through.

[0034] In one embodiment, the detection medium is gas. The detection medium supply unit 7 uses a gas source, and the detection unit uses a pressure detection element or a flow detection element. After gas is introduced into the oil circuit, if the oil hole 10 and the oil tank 11 are aligned and connected, the gas passes through the oil circuit, and the gas pressure in the oil circuit remains at a low level or the gas flow rate reaches a predetermined state; if the oil circuit is blocked, the gas pressure in the oil circuit increases and the gas flow rate approaches zero, which indicates whether the alignment and connection are correct. Gas detection is fast, the medium is easy to obtain, and there is no residue after detection. The detection gas pressure value and the judgment threshold are also considered.

[0035] In one embodiment, the detection medium is oil. The detection unit employs a flow detection element. After oil is introduced into the oil passage, the system determines whether the oil can flow out of the passage and whether the oil flow rate reaches a predetermined state. When oil is used as the detection medium, the detection result directly reflects the actual passing capacity of the lubricating medium. As an alternative implementation method, its detection effectiveness still needs to be verified.

[0036] like Figure 5 As shown, the oil circuit connectivity detection mechanism 2 also includes a judgment unit, which is signal-connected to the detection unit. The detection unit converts the detected flow state into a detection signal and sends it to the judgment unit. The judgment unit outputs a connectivity judgment result based on the flow state and stores the connectivity judgment result in association with the identifier of the crankshaft body 4, forming an oil circuit connectivity detection record for each crankshaft, which facilitates quality traceability and analysis. When the judgment unit determines that the oil hole 10 and the oil groove 11 are aligned and connected, it controls the crankshaft body 4 to be released to the next assembly station; when it determines that they are not aligned and connected, it controls the unqualified return mechanism 3 to send the crankshaft body 4 along with the flange 5 back to the press-fit station 1.

[0037] In one embodiment, when the determination unit determines that the oil hole 10 and the oil groove 11 are not aligned and connected, the rotation drive unit of the oil circuit connectivity detection mechanism 2 drives the crankshaft body 4 (or flange 5) to rotate circumferentially. During the rotation, the detection unit continuously detects the flow status of the detection medium and records the rotation angle corresponding to the smoothest flow of the detection medium as the alignment reference angle. This alignment reference angle is sent to the pressing station 1 along with the markings on the crankshaft body 4. The circumferential alignment component adjusts the relative circumferential angle between the flange 5 and the crankshaft body 4 according to the alignment reference angle, so that the oil hole 10 and the oil groove 11 are aligned and then re-pressed. After pressing, the oil circuit connectivity detection mechanism 2 verifies the alignment again. Compared with trial-and-error repeated alignment, this method helps to shorten the rework cycle and reduce the damage to the surface of the parts caused by repeated pressing.

[0038] In one embodiment, the oil circuit connectivity detection mechanism 2 is equipped with a type-change adjustment unit. The type-change adjustment unit adjusts the position of the connector 6 and the detection parameters of the detection medium supply unit 7 according to the model of the crankshaft body 4 and the flange 5, so as to adapt to the differences in the oil circuit port positions of different specifications of crankshaft body 4 and flange 5, and realize flexible detection.

[0039] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fully automated flexible assembly line for air conditioner compressor crankshafts, the assembly line comprising multiple assembly stations arranged sequentially along the conveying direction, characterized in that: The plurality of assembly stations include a press-fit station (1); the press-fit station (1) includes a crankshaft body (4) and a flange (5), the crankshaft body (4) has an oil hole (10) and the flange (5) has an oil groove (11) inside, when the flange (5) is press-fitted into place, the outlet of the oil hole (10) and the oil groove (11) are aligned and connected to form an oil passage; the assembly line also includes an oil passage connectivity detection mechanism (2) located downstream of the press-fit station (1), the oil passage connectivity detection mechanism (2) includes The system includes a connector (6), a detection medium supply unit (7), and a detection unit. The connector (6) is used to seal and connect with one end of the oil circuit. The detection medium supply unit (7) is connected to the connector (6) and is used to supply the detection medium to the oil circuit. The detection unit is used to detect the flow state of the detection medium in the oil circuit. The oil circuit connectivity detection mechanism (2) determines whether the oil hole (10) and the oil tank (11) are aligned and connected based on the flow state detected by the detection unit.

2. The fully automated flexible assembly line for air conditioner compressor crankshafts according to claim 1, characterized in that: The detection medium is either gas or oil. When the detection medium is gas, the detection unit includes a pressure detection element, and the oil circuit connectivity detection mechanism (2) determines whether the oil hole (10) and the oil tank (11) are aligned and connected based on whether the gas pressure or gas flow rate in the oil circuit reaches a predetermined state. When the detection medium is oil, the detection unit includes a flow detection element, and the oil circuit connectivity detection mechanism (2) determines whether the oil hole (10) and the oil tank (11) are aligned and connected based on whether the oil can flow out through the oil circuit and whether the oil flow rate reaches a predetermined state.

3. The fully automated flexible assembly line for air conditioner compressor crankshafts according to claim 1, characterized in that: The assembly line also includes a non-conforming return mechanism (3), which is signal-connected to the oil circuit connectivity detection mechanism (2) and is used to send the crankshaft body (4) together with the flange (5) back to the press-fit station (1) for re-alignment and press-fitting when it is determined that the oil hole (10) and the oil groove (11) are not aligned and connected.

4. The fully automated flexible assembly line for air conditioner compressor crankshafts according to claim 3, characterized in that: The press-fitting station (1) is equipped with a circumferential alignment component, which is used to adjust the circumferential relative angle between the flange (5) and the crankshaft before re-press-fitting, so that the outlet of the oil hole (10) is aligned with the oil groove (11).

5. The fully automated flexible assembly line for air conditioner compressor crankshafts according to claim 3, characterized in that: The oil circuit connectivity detection mechanism (2) is also provided with a rotary drive unit. The rotary drive unit is used to drive the crankshaft or the flange (5) to rotate circumferentially when it is determined that the oil hole (10) and the oil groove (11) are not aligned and connected. The detection unit continuously detects the flow status of the detection medium during the rotation process and records the rotation angle corresponding to the smoothest flow of the detection medium as the alignment reference angle.

6. The fully automated flexible assembly line for air conditioner compressor crankshafts according to claim 5, characterized in that: The oil circuit connectivity detection mechanism (2) sends the alignment reference angle to the pressing station (1). When pressing again, the pressing station (1) adjusts the circumferential relative angle between the flange (5) and the crankshaft according to the alignment reference angle, so that the outlet of the oil hole (10) is aligned with the oil groove (11) before pressing.

7. The fully automated flexible assembly line for air conditioner compressor crankshafts according to claim 1, characterized in that: A seal (8) is provided between the connector (6) and one end of the oil circuit. The seal (8) is used to form a seal when the connector (6) and one end of the oil circuit are connected, so as to prevent the detection medium from leaking from the connection point.

8. The fully automated flexible assembly line for air conditioner compressor crankshafts according to claim 1, characterized in that: The connector (6) is connected to a drive member (9), which is used to drive the connector (6) to move in a direction close to or away from the crankshaft so that the connector (6) can be connected to or disconnected from one end of the oil passage.

9. The fully automated flexible assembly line for air conditioner compressor crankshafts according to claim 1, characterized in that, The oil circuit connectivity detection mechanism (2) further includes a determination unit, which is signal-connected to the detection unit and is used to output a connectivity determination result according to the flow state, and to associate and store the connectivity determination result with the identifier of the crankshaft; the determination unit is also used to control the crankshaft to be released to the next assembly station when it is determined that the oil hole (10) and the oil groove (11) are aligned and connected.

10. The fully automated flexible assembly line for air conditioner compressor crankshafts according to claim 1, characterized in that, The oil circuit connectivity detection mechanism (2) is equipped with a type-changing adjustment unit. The type-changing adjustment component is used to adjust the position of the connector (6) and the detection parameters of the detection medium supply unit (7) according to the model of the crankshaft and the flange (5).

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