Idle wheel assembly assembling tool matched with double air conditioner engines and using method of idle wheel assembly assembling tool

Abstract

The invention provides an idle wheel assembly assembling tool matched with double air conditioner engines and a using method of the idle wheel assembly assembling tool, and belongs to the technical field of engine idle wheel assembly.The tool comprises a supporting arm unit, a supporting seat and a supporting frame; one end of the support arm unit is connected with a support seat, and the other end of the support arm unit is connected with a support frame; a moving block is arranged in the supporting frame and provided with an arc-shaped supporting plate. The supporting frame is provided with an adjusting bolt, and the adjusting bolt extends into the supporting frame and then is in threaded connection with the moving block. The supporting seat is connected with a connecting rod; the connecting rod is connected with a connecting seat; the connecting seat is connected with a bracket. The device adapts to compact spaces of double air conditioner engines, can solve the problems of no positioning points and installation interference, realizes single-person operation through stable lifting and accurate positioning, greatly shortens the assembly rhythm, can completely eradicate safety and quality risks, adapts to various deformation machine types, can be quickly disassembled and assembled, and meets batch production and after-sales demands.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine idler assembly, and particularly relates to an idler assembly assembly tool for a double air-conditioning engine and a use method thereof. BACKGROUND

[0002] In the field of sub-models such as refrigerated trucks, double air-conditioning engines have a huge market demand because they can meet the high-strength refrigeration demand, and the annual demand for installed capacity exceeds 10,000 units. Such engines usually arrange air-conditioning compressors on the intake side and the exhaust side, transmit power through elastic multi-wedge belts and crankshaft pulleys, and use idler assemblies to replace traditional tensioner systems to achieve the design goals of compact structure, controllable cost and reliable operation.

[0003] However, the existing idler assembly of the double air-conditioning engine faces many technical problems. On the one hand, the space on the engine exhaust side is already compact, and after the assembly of most parts such as the water pump inlet pipe and the hose joint is completed, the installation space left for the idler assembly is further compressed, which causes the shaft body of the idler assembly to easily interfere with and collide with the surrounding parts during assembly, affecting the assembly efficiency and product quality. On the other hand, the elastic multi-wedge belt for adapting to the double air-conditioning system is shorter in length and has a larger initial installation tension, and the idler assembly is strengthened in diameter and shaft diameter to match the tension, which increases the size and further increases the installation difficulty. At the same time, the double air-conditioning installation station is located before the line-off of the assembly line, and the engine is placed on an iron tray or a wooden tray that lacks positioning points, so that the traditional tooling cannot be arranged, and there is no suitable installation tool in the existing assembly process.

[0004] In the prior art, a Chinese patent with the authorization announcement number CN208793539U discloses an idler tensioning combined support, and a Chinese patent with the authorization announcement number CN203452911U discloses a multifunctional idler tensioning combined support. Although the above combined supports can realize tensioning of the wheel train and integrated installation of parts, they cannot solve the problem of assembly operation of the idler assembly in a compact space and cannot adapt to the special installation scene of the double air-conditioning engine. At present, in production, the idler assembly can only be installed by forcibly prying the multi-wedge belt with a crowbar. This method requires multiple people to cooperate, has a long assembly rhythm, and is easy to damage parts and cause safety accidents, which is difficult to meet the batch production demand. Therefore, there is an urgent need in the industry for a special idler assembly tool for a double air-conditioning engine to solve the technical defects in the prior art. SUMMARY

[0005] The present application aims to overcome the deficiencies of the prior art, such as high operation difficulty, high consumption of manpower and material resources, and poor safety, and to provide an idler assembly assembly tool for a double air-conditioning engine and a use method thereof.

[0006] The application is implemented by the following technical scheme: a supporting frame assembly tool suitable for a double air-conditioning engine idler assembly, comprising a supporting arm unit, a supporting seat and a supporting frame; one end of the supporting arm unit is connected with the supporting seat, and the other end of the supporting arm unit is connected with the supporting frame; a moving block is arranged in the supporting frame, and the moving block is provided with an arc-shaped supporting plate corresponding to the idler on one side of the engine; an adjusting bolt is rotatably arranged on the top of the supporting frame, a bolt through hole is formed in the top of the moving block and is matched with the adjusting bolt, and the adjusting bolt is screwed with the bolt through hole after extending into the supporting frame; the moving block can move up and down along the length direction of the supporting frame on the adjusting bolt by rotating the adjusting bolt; a connecting rod is connected with the supporting seat on one side of the engine, and a connecting seat is connected with one end of the connecting rod away from the supporting seat; a bracket is connected with the connecting seat, and the bracket is detachably connected with the cylinder body of the engine through a bolt.

[0007] The tool can solve the core problems of no positioning point and compact installation space on the exhaust side of the double air-conditioning engine through the above design, does not need to rely on external positioning structure, realizes stable lifting and accurate positioning of the idler, greatly reduces the manual operation strength compared with the traditional crowbar installation, and avoids part interference and collision.

[0008] Further improvement of the application is that the supporting arm unit comprises an upper inclined arm and a lower inclined arm corresponding in up and down directions; the high end of the upper inclined arm is connected with the upper part of the supporting frame, and the low end of the upper inclined arm is connected with the upper part of the supporting seat; the low end of the lower inclined arm is connected with the lower part of the supporting frame, and the high end of the lower inclined arm is connected with the lower part of the supporting seat; the upper inclined arm, the lower inclined arm, the supporting seat and the supporting frame can form a triangular structure.

[0009] The tool can improve the supporting stiffness and stability while ensuring the lightweight of the overall structure, avoid tool deformation or shaking when lifting the 810N tension of the multi-wedge belt, and ensure that the idler assembly precision is controlled within ±0.5mm.

[0010] Further improvement of the application is that the supporting frame is a U-shaped frame with an opening downward, comprising a cross beam, a longitudinal beam A and a longitudinal beam B, and the two ends of the cross beam are connected with the longitudinal beam A and the longitudinal beam B perpendicularly; the cross beam is rotatably connected with the adjusting bolt, and the upper part and the lower part of the longitudinal beam A are fixedly connected with the high end of the upper inclined arm and the low end of the lower inclined arm respectively.

[0011] The tool has compact structure and high rigidity, occupies less space than the traditional support as a whole, perfectly adapts to the compact installation environment on the exhaust side of the engine, provides a precise guide rail for the moving block, avoids deviation in the lifting process, and solves the defect that only parts can be fixed in the prior art and cannot be assembled.

[0012] Further improvement of the present application is that two ends of the moving block are respectively provided with connecting sliding grooves matched with the longitudinal beam A and the longitudinal beam B, and the moving block is respectively slidably connected with the longitudinal beam A and the longitudinal beam B through the connecting sliding grooves at the two ends.

[0013] Compared with the sliding structure not involved in the prior art, the tooling can increase the sliding contact area, the stress is more uniform, the moving block jamming problem is completely avoided, the idler lifting process is stable and no shaking occurs, and the multi-wedge belt damage or assembly deviation caused by jamming is prevented.

[0014] Further improvement of the present application is that the top of the moving block is provided with a semicircular through hole with the same center as the arc-shaped supporting plate, the bolt through hole is located on one side of the semicircular through hole close to the longitudinal beam A, and the width of the arc-shaped supporting plate is less than the width of the idler.

[0015] The tooling can ensure that the idler does not overturn during lifting, can solve the interference problem of bolt fastening in a compact space, is convenient for the tooling to be quickly separated after assembly, avoids damaging the idler surface and the engine peripheral components, and completely eliminates the risk of component scratching compared with the installation of a crowbar.

[0016] Further improvement of the present application is that the upper part and the lower part of the longitudinal beam A are provided with intelligent latches, the moving block can be connected with the intelligent latches corresponding in position when the moving block is located at a high position or a low position, the intelligent latch comprises a support CPW010 and a proximity switch sensor, the support CPW010 is arranged on the longitudinal beam A, and the proximity switch sensor is arranged at a position close to the support CPW010, the support CPW010 is electrically connected with the proximity switch sensor, the proximity switch sensor can sense the position of the moving block and control the extension and retraction of the extension shaft of the support CPW010, and the moving block is provided with a limiting pin hole matched with the extension shaft of the support CPW010 in the connecting sliding groove corresponding to the longitudinal beam A, and the extension shaft of the support CPW010 can extend into or out of the limiting pin hole.

[0017] The tooling can effectively bear the reverse tension of the 810N elastic multi-wedge belt, avoid the thread failure of the adjusting bolt caused by long-term stress, prolong the service life of the tooling, realize the rapid positioning of the assembly station, shorten the alignment time from 30 seconds to 3 seconds, greatly improve the production line rhythm, and avoid the safety hazards caused by the sliding of the moving block.

[0018] Further improvements of the present application also have, the upper part of the support seat is respectively inserted with the low end of the upper inclined arm and the connecting rod;The lower part of the support seat is provided with an adjusting groove corresponding to the lower inclined arm, and the high end of the lower inclined arm is inserted into the adjusting groove;The top of the support seat is inserted with a fixed pin, which is inserted into the support seat top and can be connected with the upper inclined arm, the lower inclined arm and the connecting rod in turn;The low end of the upper inclined arm, the high end of the lower inclined arm and the end of the connecting rod are all provided with a plurality of connecting pin holes matched with the fixed pin, which are uniformly distributed along the length direction of the upper inclined arm, the lower inclined arm and the connecting rod.

[0019] The tooling can realize quick disassembly and position fine adjustment of the tooling, adapt to the reinforced idler wheel with a wheel diameter of 74mm and a shaft diameter of 30mm and other models of idler wheels, solve the problem of component jamming and difficult adjustment in compact space, and avoid damage to the engine air conditioning system or multi-wedge belt during disassembly.

[0020] Further improvements of the present application also have, the lower part of the bracket is connected with a transition adapter plate, and the transition adapter plate is connected with the connecting seat pin through a pin mechanism;The pin mechanism comprises a pin handle, and the upper part and the lower part of the pin handle are respectively provided with a positioning pin A and a positioning pin B;The upper part and the lower part of the transition adapter plate are respectively provided with a positioning pin hole A and a positioning pin hole B matched with the positioning pin A and the positioning pin B;The positioning pin A can be inserted into the positioning pin hole A after passing through the connecting seat, and the positioning pin B can be inserted into the positioning pin hole B after passing through the connecting seat;The pin handle is connected with a fixed pin capable of being connected with the connecting rod, the end of the connecting rod is inserted into the connecting seat, and the fixed pin can be inserted into the connecting seat and connected with the connecting rod after the connecting rod is inserted into the connecting seat.

[0021] The tooling can quickly complete the positioning assembly of the tooling and the engine, the positioning accuracy is ±0.3mm, the disassembly is convenient, and the tooling can be divided into independent parts such as a support arm unit, a support frame and a bracket, the maximum size of a single part is ≤500mm, the transportation and carrying requirements of the after-sales maintenance scene are met, and the flexibility can be significantly improved compared with the integral tooling.

[0022] Further improvements of the present application also have, the two positioning pin holes A in a group are provided with a group;The two positioning pin holes B in a group are provided with a plurality of groups;The two positioning pin holes A in the same group and the two positioning pin holes B in the same group are horizontally spaced apart by 15mm;And a plurality of groups of positioning pin holes B are uniformly and evenly distributed along the circular arc track, when the positioning pin A is inserted into the positioning pin hole A, the connecting seat can rotate around the positioning pin A, so that the positioning pin B can be inserted into the corresponding positioning pin hole B.

[0023] This tooling, through the above design, can be adapted to various modified machine models such as the 082V19101-0011 compressor bracket and the 082V95800-0001 idler wheel, achieving "one tooling for multiple uses". It eliminates the need to design special tooling for different machine models, reduces production costs by more than 30%, and meets the needs of rapid model switching in mass production.

[0024] A method for using an idler wheel assembly tooling adapted to a dual-air conditioning engine includes the following steps: S1. Tooling positioning: Select the corresponding hole position according to the model, fix the bracket to the engine cylinder block, lock the transition plate and the connecting seat through the pin mechanism, insert the fixing pin to fix the support arm unit and the connecting rod, and align with the assembly station; S2. Place the idler wheel: Place the idler wheel to be installed on the arc-shaped support plate of the moving block and attach it to the appropriate fit; S3. Lifting and positioning: Rotate the adjusting bolt to drive the moving block to slide up along the longitudinal beam slide rail, and tighten the elastic multi-wedge belt until the proximity switch sensor senses the position; S4. Locking: The proximity switch sensor control support CPW010 pin locks the moving block; S5. Secure the idler wheel: Insert bolts through the semi-circular through holes to fix the idler wheel to the refrigeration compressor bracket; S6. Disassembly of fixture: Unlock the support pin, rotate the adjusting bolt in the opposite direction to make the moving block fall back and lock, and disassemble the bracket bolt, the locking mechanism and the fixing pin in sequence.

[0025] The above-described method allows for independent operation by a single person, reducing the traditional pry bar installation cycle from 207 seconds per piece to 45 seconds per piece, thus improving production line efficiency. It also completely eliminates safety accidents and component scratches caused by pry bar slippage, improving product qualification rates and fully meeting the cycle time, safety, and quality requirements for mass production of dual air conditioning engines.

[0026] As can be seen from the above technical solutions, the beneficial effects of the present invention are: 1. This tooling specifically addresses the core assembly challenges posed by the limited space and lack of positioning on the exhaust side of dual-air conditioning engine components. By directly connecting the bracket to the engine block, it avoids the problem of lacking positioning points on iron / wooden pallets. The triangular frame structure and parallel slide rail design achieve lightweight and high stability within a 300mm span, and it is compatible with reinforced idler pulleys with a 74mm diameter. The narrow arc-shaped support plate and semi-circular through-hole avoidance structure effectively prevent interference between the idler pulley and components such as the water pump inlet pipe, successfully overcoming the installation resistance of the 810N high-tension multi-wedge belt, and completely solving the pain points of traditional pry bar installation, such as easy bumping and difficult operation.

[0027] 2. This fixture significantly improves assembly efficiency and safety, enabling independent operation by a single person and reducing the traditional assembly cycle time of 207 seconds / piece to 45 seconds / piece, thus enhancing production line efficiency. The intelligent pin's sensor-locking function quickly positions the assembly station and distributes the tension of the multi-wedge belt, preventing bolt thread failure and eliminating safety accidents and component scratches caused by pry bar slippage. This improves product qualification rates and fully meets the quality and cycle time requirements of mass production.

[0028] 3. This tooling is highly versatile and practical. With multiple sets of holes and adjustable arc angles, it is compatible with single / double groove pulleys and various modified machine models, eliminating the need for specialized tooling and reducing production costs. The quick-release pin structure allows for disassembly and transport; the maximum size of a single component is ≤500mm, making it suitable for after-sales maintenance. Meanwhile, the lightweight rod design and rigid frame balance ease of operation and durability, achieving the comprehensive benefit of "one tooling for multiple uses." Attached Figure Description

[0029] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0031] Figure 2 This is a structural schematic diagram of the arm unit, support base, and support frame according to a specific embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram of the support frame structure according to a specific embodiment of the present invention.

[0033] Figure 4 This is a schematic diagram of the structure of the movable block and the smart latch in a specific embodiment of the present invention.

[0034] Figure 5 This is a schematic diagram of the bracket and transition plate according to a specific embodiment of the present invention.

[0035] Figure 6 This is a schematic diagram of the connecting seat, transition plate, and pin mechanism according to a specific embodiment of the present invention.

[0036] Figure 7 This is a structural schematic diagram of the support base and connecting base according to a specific embodiment of the present invention.

[0037] In the diagram: 1. Support arm unit; 101. Upper tilting arm; 102. Lower tilting arm; 103. Connecting pin hole; 2. Support base; 201. Adjustment groove; 202. Fixing pin; 3. Support frame; 301. Crossbeam; 302. Longitudinal beam A; 303. Longitudinal beam B; 4. Moving block; 401. Arc-shaped support plate; 402. Bolt through hole; 403. Connecting slide; 404. Semi-circular through hole; 405. Limiting pin hole; 5. Adjusting bolt; 6. Connecting rod; 7. Connecting base; 8. Bracket; 9. Transition plate; 901. Positioning pin hole A; 902. Positioning pin hole B; 10. Pin engagement mechanism; 1001. Pin handle; 1002. Positioning pin A; 1003. Positioning pin B; 1004. Fixing pin; 11. Intelligent pin; 1101. Support CPW010; 1102. Proximity switch sensor. Detailed Implementation

[0038] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0039] Now refer to Figures 1-7 The following is a description of a specific embodiment of the present invention: An idler wheel assembly assembly tooling adapted to a dual-air conditioning engine includes a support arm unit 1, a support base 2, and a support frame 3. One end of the support arm unit 1 is connected to the support base 2, and the other end of the support arm unit 1 is connected to the support frame 3. A movable block 4 is provided inside the support frame 3, and an arc-shaped support plate 401 adapted to the idler wheel is provided on the side of the movable block 4 corresponding to the engine. An adjusting bolt 5 is rotatably provided on the top of the support frame 3, and a bolt through hole 402 adapted to the adjusting bolt 5 is opened on the top of the movable block 4. The adjusting bolt 5 extends into the support frame 3 and is screwed into the bolt through hole 402. By rotating the adjusting bolt 5, the movable block 4 can move up and down along the length direction of the support frame 3 on the adjusting bolt 5. A connecting rod 6 is connected to the side of the support base 2 corresponding to the engine, and a connecting seat 7 is connected to the end of the connecting rod 6 away from the support base 2. A bracket 8 is connected to the connecting seat 7, and the bracket 8 is detachably connected to the engine cylinder block by bolts.

[0040] The bracket 8 is detachably connected to the engine block with bolts, directly using the cylinder block as a stable positioning reference, thus avoiding the problem of no positioning point for iron / wooden pallets. When the adjusting bolt 5 is rotated, it forms a helical transmission with the bolt through hole 402 of the moving block 4, converting the rotational motion into linear motion of the moving block 4 along the length of the support frame 3, so that the arc-shaped pallet 401 accurately lifts the idler wheel to dock with the assembly station. The connecting rod 6 and the connecting seat 7 form a rigid transmission path, transmitting the supporting force of the support arm unit 1 to the bracket 8, ensuring that the tooling does not shake during the lifting process.

[0041] This tooling, through the above design, can specifically address the core pain points of the lack of positioning points on the exhaust side of dual-air conditioning engines and the compact installation space. It does not rely on external positioning structures, and can achieve stable lifting and precise positioning of the idler wheel. Compared with traditional pry bar installation, it significantly reduces the intensity of manual operation and avoids component interference and collisions.

[0042] Specifically, refer to Figure 2 The support arm unit 1 includes an upper inclined arm 101 and a lower inclined arm 102, which are distributed vertically. The upper end of the upper inclined arm 101 is connected to the upper part of the support frame 3, and the lower end of the upper inclined arm 101 is connected to the upper part of the support seat 2. The lower end of the lower inclined arm 102 is connected to the lower part of the support frame 3, and the upper end of the lower inclined arm 102 is connected to the lower part of the support seat 2. The upper inclined arm 101, the lower inclined arm 102, the support seat 2, and the support frame 3 can form a triangular structure.

[0043] The upper inclined arm 101 and the lower inclined arm 102 of the support arm unit 1 are symmetrically distributed vertically. The upper inclined arm 101 is fixed to the upper part of the support frame 3 at its high position and inserted into the upper part of the support seat 2 at its low position. The lower inclined arm 102 is fixed to the lower part of the support frame 3 at its low position and inserted into the adjustment groove 201 of the support seat 2 at its high position, forming a closed triangular force-bearing structure. The bending moment generated by the 300mm span of the tooling is dispersed by utilizing the non-deformable properties of the triangle.

[0044] The above design of this fixture can improve the support rigidity and stability while ensuring the overall structure is lightweight, avoid fixture deformation or shaking when raising the multi-wedge belt with 810N tension, and ensure that the idler wheel assembly accuracy is controlled within ±0.5mm.

[0045] Specifically, refer to Figure 2 and 3 The support frame 3 is a U-shaped frame with an opening facing downwards, including a crossbeam 301, a longitudinal beam A302 and a longitudinal beam B303. The two ends of the crossbeam 301 are perpendicularly connected to the longitudinal beams A302 and B303 respectively. The crossbeam 301 is rotatably connected to the adjusting bolt 5. The upper and lower parts of the longitudinal beam A302 are fixedly connected to the high end of the upper inclined arm 101 and the low end of the lower inclined arm 102 respectively.

[0046] The support frame 3 adopts a U-shaped design with the opening facing downwards. The two ends of the crossbeam 301 are vertically welded to the longitudinal beams A302 and B303 respectively to form a rigid frame. The center of the crossbeam 301 has a threaded hole that rotates with the adjusting bolt 5 to provide a stable support point for the adjusting bolt 5. The upper and lower ends of the longitudinal beam A302 are welded to the high end of the upper inclined arm 101 and the low end of the lower inclined arm 102 respectively to achieve uniform force transmission.

[0047] This fixture, through the above design, has a compact and rigid structure, occupies less space than traditional brackets, and is perfectly suited to the compact installation environment on the exhaust side of the engine; it provides a precise guide track for the moving block 4, avoiding deviation during the lifting process, and solves the defect of existing technologies that can only fix parts and cannot assist in assembly.

[0048] Specifically, refer to Figure 3 and 4 The movable block 4 has connecting grooves 403 at both ends that are adapted to the longitudinal beams A302 and B303, respectively. The movable block 4 slides with the longitudinal beams A302 and B303 through the connecting grooves 403 at both ends.

[0049] The connecting grooves 403 at both ends of the movable block 4 adopt a rectangular groove structure, which forms a clearance fit with the rectangular sections of the longitudinal beams A302 and B303, restricting the lateral displacement of the movable block 4 and allowing it to slide up and down only along the length of the longitudinal beams; the inner wall of the groove is polished to reduce sliding friction resistance.

[0050] Compared to sliding structures not addressed in existing technologies, this fixture, through the above design, can increase the sliding contact area, distribute the force more evenly, completely avoid the problem of moving block 4 getting stuck, ensure that the idler wheel lifting process is smooth and without shaking, and prevent damage to the multi-wedge belt or assembly deviation caused by jamming.

[0051] Specifically, refer to Figure 4 The top of the movable block 4 has a semi-circular through hole 404 with the same center as the arc-shaped support plate 401. The bolt through hole 402 is located on the side of the semi-circular through hole 404 near the longitudinal beam A302, and the width of the arc-shaped support plate 401 is smaller than the width of the idler wheel.

[0052] The semicircular diameter of the arc-shaped support plate 401 is perfectly matched with the 082V95800-0002 idler wheel assembly, with a contact area of ​​1 / 3 of the outer circumference of the idler wheel, ensuring lifting stability. The arc-shaped support plate 401 is 15mm narrower than the idler wheel to avoid interference with surrounding components such as the engine water pump inlet pipe and hose connector. The semicircular through hole 404 is concentric with the arc-shaped support plate 401, and its diameter is 8mm larger than the idler wheel fastening bolt, providing ample space for bolt insertion and air gun sleeve operation. The bolt through hole 402 is located on the side of the semicircular through hole 404 near the longitudinal beam A302, so that the force of the adjusting bolt 5 is collinear with the force center of the idler wheel.

[0053] This fixture, through the above design, can ensure that the idler wheel will not tip over when it is raised, and can also specifically solve the problem of bolt tightening interference in a compact space. At the same time, it is easy to quickly detach the fixture after assembly, avoiding damage to the idler wheel surface and engine surrounding components. Compared with pry bar installation, it completely eliminates the risk of scratching components.

[0054] Specifically, refer to Figures 2-4 The upper and lower parts of the longitudinal beam A302 are both equipped with intelligent pins 11. When the moving block 4 is in a high or low position, the moving block 4 can be connected to the intelligent pin 11 corresponding to the position. The intelligent pin 11 includes a support CPW0101101 and a proximity switch sensor 1102. The support CPW0101101 is disposed on the longitudinal beam A302, and the proximity switch sensor 1102 is disposed near the support CPW0101101. The support CPW0101101 is electrically connected to the proximity switch sensor 1102. The proximity switch sensor 1102 can sense the position of the moving block 4 and control the extension and retraction of the extension shaft of the support CPW0101101. The moving block 4 has a limiting pin hole 405 inside the connecting groove 403 corresponding to the longitudinal beam A302, which is adapted to the extension shaft of the support CPW0101101. The extension shaft of the support CPW0101101 can extend into or out of the limiting pin hole 405.

[0055] The intelligent pins 11 at the top and bottom of the longitudinal beam A302 have proximity switch sensors 1102 with an inductive sensing design. The sensing distance is ≤5mm, which can accurately detect the high and low positions of the moving block 4. When the moving block 4 reaches the high position, the proximity switch sensor 1102 outputs an electrical signal to control the support CPW0101101 to extend its shaft and insert it into the limit pin hole 405, locking the moving block 4. After assembly, the sensor senses that the moving block 4 has fallen back to the low position and controls the extension shaft to insert into the limit pin hole 405 again, preventing the moving block 4 from falling off the support frame 3.

[0056] This fixture, through the above design, can effectively withstand the reverse tension of the 810N elastic multi-wedge belt, avoid the thread failure caused by long-term stress on the adjusting bolt 5, and extend the service life of the fixture; at the same time, it can achieve rapid positioning of the assembly station without repeated manual calibration, shortening the alignment time from the traditional 30 seconds to 3 seconds, greatly improving the production line cycle time, and avoiding the safety hazards caused by the slippage of the moving block 4.

[0057] Specifically, refer to Figure 2 and 7The upper part of the support base 2 is respectively inserted into the lower end of the upper tilting arm 101 and the connecting rod 6; the lower part of the support base 2 is provided with an adjustment groove 201 corresponding to the lower tilting arm 102, and the higher end of the lower tilting arm 102 is inserted into the adjustment groove 201; a fixing pin 202 is inserted into the top of the support base 2, and the fixing pin 202 is inserted from the top of the support base 2 to be sequentially pin connected to the upper tilting arm 101, the lower tilting arm 102 and the connecting rod 6; the lower end of the upper tilting arm 101, the higher end of the lower tilting arm 102 and the end of the connecting rod 6 are each provided with a plurality of connecting pin holes 103 adapted to the fixing pin 202, and the connecting pin holes 103 are evenly distributed along the length direction of the upper tilting arm 101, the lower tilting arm 102 and the connecting rod 6.

[0058] The upper part of the support base 2 is connected to the upper tilting arm 101 and the connecting rod 6 by a plug-in joint. The lower adjustment groove 201 provides a fine adjustment stroke of ±10mm for the lower tilting arm 102. The fixing pin 202 is inserted from the top of the support base 2 and passes through the connecting pin holes 103 of the upper tilting arm 101, the lower tilting arm 102 and the connecting rod 6 in sequence to realize the synchronous locking of multiple parts. The connecting pin holes 103 are arranged in a set every 15mm along the length of the parts, and the assembly position can be adjusted according to the installation distance requirements of different idler wheels.

[0059] This tooling, through the above design, enables quick assembly and disassembly as well as fine-tuning of its position. It is compatible with reinforced idler pulleys with a wheel diameter of 74mm and a shaft diameter of 30mm, as well as other types of idler pulleys. This solves the problem of parts getting stuck and difficult to adjust in a compact space, and avoids damage to the engine air conditioning system or multi-ribbed belts during disassembly.

[0060] Specifically, refer to Figure 5 and 6 The lower part of the bracket 8 is connected to a transition plate 9, and the transition plate 9 is pin-connected to the connecting seat 7 via a locking mechanism 10; the locking mechanism 10 includes a pin handle 1001, and the upper and lower parts of the pin handle 1001 are respectively provided with a positioning pin A1002 and a positioning pin B1003; the upper and lower parts of the transition plate 9 are respectively provided with positioning pin holes A901 and B902 that are adapted to the positioning pins A1002 and B1003; The positioning pin A1002 passes through the connecting seat 7 and can be inserted into the positioning pin hole A901, and the positioning pin B1003 passes through the connecting seat 7 and can be inserted into the positioning pin hole B902; the pin handle 1001 is connected to a fixing pin 1004 that can be pinned to the connecting rod 6, the end of the connecting rod 6 is inserted into the connecting seat 7, and after the connecting rod 6 is inserted into the connecting seat 7, the fixing pin 1004 can be inserted into the connecting seat 7 and inserted into the connecting rod 6.

[0061] The pin handle 1001 of the connecting mechanism 10 adopts a lever design. Pressing the pin handle 1001 can simultaneously drive the positioning pins A1002 and B1003 through the connecting seat 7 and insert them into the positioning pin holes A901 and B902 of the transition plate 9, respectively, to achieve precise positioning. After the connecting rod 6 is inserted into the connecting seat 7, the fixing pin 1004 is inserted laterally into the pin holes of the connecting seat 7 and the connecting rod 6 to form a double lock. When disassembling, it is only necessary to pull out the fixing pin 1004 and pry the pin handle 1001 to separate the parts.

[0062] This tooling, through the above design, can quickly complete the positioning and assembly of the tooling and the engine with a positioning accuracy of ±0.3mm. It is easy to disassemble and can be separated into independent components such as outrigger units, support frames, and brackets. The maximum size of a single component is ≤500mm, which meets the transportation and carrying needs of after-sales maintenance scenarios. Compared with integrated tooling, it can significantly improve flexibility.

[0063] Specifically, refer to Figure 6 The positioning pin holes A901 are arranged in groups of two, and there is one group; the positioning pin holes B902 are arranged in groups of two, and there are several groups; the two positioning pin holes A901 and the two positioning pin holes B902 in the same group are horizontally spaced 15mm apart; and the several groups of positioning pin holes B902 are evenly distributed along an arc trajectory. When the positioning pin A1002 is inserted into the positioning pin hole A901, the connecting seat 7 can rotate around the positioning pin A1002 as an axis, so that the positioning pin B1003 can be inserted into the corresponding positioning pin hole B902.

[0064] Two positioning pin holes A901 in the same group are horizontally spaced 15mm apart, serving as reference positioning holes; several groups of positioning pin holes B902 are distributed along an arc trajectory, with the arc radius consistent with the rotation center of the connecting seat 7, and the included angle between adjacent groups of holes is 15°, covering an adjustment range of 0°-90°; after the positioning pin A1002 is inserted into the positioning pin hole A901, the connecting seat 7 can rotate around the positioning pin A1002, and according to the installation requirements of single-groove / double-groove pulleys and different air conditioning compressor brackets, the positioning pin B1003 is inserted into the corresponding group of positioning pin holes B902.

[0065] This tooling, through the above design, can be adapted to various modified machine models such as the 082V19101-0011 compressor bracket and the 082V95800-0001 idler wheel, achieving "one tooling for multiple uses". It eliminates the need to design special tooling for different machine models, reduces production costs by more than 30%, and meets the needs of rapid model switching in mass production.

[0066] A method for using an idler wheel assembly tooling adapted to a dual-air conditioning engine includes the following steps: S1. Tooling positioning: Select the corresponding hole position according to the model, fix the bracket 8 to the engine cylinder block, lock the transition plate 9 and the connecting seat 7 through the locking pin mechanism 10, insert the fixing pin 202 to fix the support arm unit 1 and the connecting rod 6, and align with the assembly station. S2. Place the idler wheel: Place the idler wheel to be installed on the arc-shaped support plate 401 of the moving block 4 and attach it to the appropriate position; S3. Lifting and positioning: Rotate the adjusting bolt 5 to drive the moving block 4 to slide up along the longitudinal beam slide rail, and tighten the elastic multi-wedge belt until the proximity switch sensor 1102 senses the position. S4. Locking: Proximity switch sensor 1102 controls support CPW0101101 pin locking moving block 4; S5. Secure the idler wheel: Insert bolts through the semi-circular through-hole 404 to fix the idler wheel to the refrigeration compressor bracket; S6. Disassembly of fixture: Unlock the support pin, rotate the adjusting bolt 5 in the opposite direction to make the moving block 4 fall back and lock, and disassemble the bracket bolt, the locking mechanism 10 and the fixing pin 202 in sequence.

[0067] The process follows a closed-loop operation: "S1 Tooling positioning - S2 Idler wheel placement - S3 Lifting positioning - S4 Locking - S5 Idler wheel tightening - S6 Tooling disassembly". In S1, the positioning pin hole B902 of the transition plate 9 and the connecting pin hole 103 of the support arm unit 1 are selected according to the machine model to ensure precise alignment between the tooling and the assembly station. In S3, rotating the adjusting bolt 5 drives the moving block 4 to slide along the slide rails of the longitudinal beam A302 and the longitudinal beam B303, tightening the elastic multi-wedge belt until the proximity switch sensor 1102 outputs a signal indicating that it is in position. In S4, the support CPW0101101 automatically locks the moving block 4 to prevent displacement during assembly. In S6, the tooling is prevented from becoming unstable by following the sequence of "first removing the bracket bolts → then removing the connecting pin mechanism 10 → finally removing the fixing pin 202".

[0068] The above-described method allows for independent operation by a single person, reducing the traditional pry bar installation cycle from 207 seconds per piece to 45 seconds per piece, thus improving production line efficiency. It also completely eliminates safety accidents and component scratches caused by pry bar slippage, improving product qualification rates and fully meeting the cycle time, safety, and quality requirements for mass production of dual air conditioning engines.

[0069] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An idler wheel assembly assembly tooling adapted to a dual-air conditioning engine, comprising a support arm unit (1), a support base (2), and a support frame (3), characterized in that, One end of the support arm unit (1) is connected to a support base (2), and the other end of the support arm unit (1) is connected to a support frame (3); a moving block (4) is provided inside the support frame (3), and an arc-shaped support plate (401) adapted to the idler wheel is provided on the side of the moving block (4) corresponding to the engine; an adjusting bolt (5) is rotatably provided on the top of the support frame (3), and a bolt through hole (402) adapted to the adjusting bolt (5) is opened on the top of the moving block (4), and the adjusting bolt (5) extends into the support frame (3) and is screwed into the bolt through hole (402); by rotating the adjusting bolt (5), the moving block (4) can move up and down along the length direction of the support frame (3) on the adjusting bolt (5); a connecting rod (6) is connected to the side of the support base (2) corresponding to the engine, and a connecting seat (7) is connected to the end of the connecting rod (6) away from the support base (2); a bracket (8) is connected to the connecting seat (7), and the bracket (8) is detachably connected to the cylinder block of the engine by bolts.

2. The idler wheel assembly assembly tooling adapted for a dual-air conditioning engine according to claim 1, characterized in that, The arm unit (1) includes an upper inclined arm (101) and a lower inclined arm (102) distributed vertically. The upper end of the upper inclined arm (101) is connected to the upper part of the support frame (3), and the lower end of the upper inclined arm (101) is connected to the upper part of the support seat (2). The lower end of the lower inclined arm (102) is connected to the lower part of the support frame (3), and the upper end of the lower inclined arm (102) is connected to the lower part of the support seat (2). The upper inclined arm (101), the lower inclined arm (102), the support seat (2), and the support frame (3) can form a triangular structure.

3. The idler wheel assembly assembly tooling adapted for a dual-air conditioning engine according to claim 2, characterized in that, The support frame (3) is a U-shaped frame with an opening facing downwards, including a crossbeam (301), a longitudinal beam A (302) and a longitudinal beam B (303). The two ends of the crossbeam (301) are perpendicularly connected to the longitudinal beam A (302) and the longitudinal beam B (303) respectively. The crossbeam (301) is rotatably connected to the adjusting bolt (5). The upper and lower parts of the longitudinal beam A (302) are fixedly connected to the high end of the upper inclined arm (101) and the low end of the lower inclined arm (102) respectively.

4. The idler wheel assembly assembly tooling adapted for a dual-air conditioning engine according to claim 3, characterized in that, The movable block (4) has connecting grooves (403) at both ends that are adapted to the longitudinal beams A (302) and B (303), respectively. The movable block (4) slides with the longitudinal beams A (302) and B (303) through the connecting grooves (403) at both ends.

5. The idler wheel assembly assembly tooling adapted for a dual-air conditioning engine according to claim 4, characterized in that, The top of the moving block (4) is provided with a semi-circular through hole (404) with the same center as the arc-shaped support plate (401). The bolt through hole (402) is located on the side of the semi-circular through hole (404) close to the longitudinal beam A (302), and the width of the arc-shaped support plate (401) is smaller than the width of the idler wheel.

6. The idler wheel assembly assembly tooling adapted for a dual-air conditioning engine according to claim 3, characterized in that, Both the upper and lower parts of the longitudinal beam A (302) are provided with intelligent pins (11). When the moving block (4) is in a high or low position, the moving block (4) can be connected to the intelligent pin (11) corresponding to the position. The intelligent pin (11) includes a support CPW010 (1101) and a proximity switch sensor (1102). The support CPW010 (1101) is set on the longitudinal beam A (302), and the proximity switch sensor (1102) is set at a position close to the support CPW010 (1101). The support CPW010 (1101) is electrically connected to the proximity switch sensor (1102). The proximity switch sensor (1102) can sense the position of the moving block (4) and control the extension and retraction of the extension shaft of the support CPW010 (1101). The moving block (4) has a limiting pin hole (405) inside the connecting groove (403) of the longitudinal beam A (302) that is adapted to the extension shaft of the support CPW010 (1101). The extension shaft of the support CPW010 (1101) can extend into or out of the limiting pin hole (405).

7. The idler wheel assembly assembly tooling adapted for a dual-air conditioning engine according to claim 2, characterized in that, The upper part of the support base (2) is respectively inserted into the lower end of the upper tilting arm (101) and the connecting rod (6); the lower part of the support base (2) is provided with an adjustment groove (201) corresponding to the lower tilting arm (102), and the upper end of the lower tilting arm (102) is inserted into the adjustment groove (201); a fixing pin (202) is inserted into the top of the support base (2), and the fixing pin (202) is inserted from the top of the support base (2) to be sequentially pin connected to the upper tilting arm (101), the lower tilting arm (102) and the connecting rod (6); the lower end of the upper tilting arm (101), the upper end of the lower tilting arm (102) and the end of the connecting rod (6) are each provided with a number of connecting pin holes (103) adapted to the fixing pin (202), and the connecting pin holes (103) are evenly distributed along the length direction of the upper tilting arm (101), the lower tilting arm (102) and the connecting rod (6).

8. The idler wheel assembly assembly tooling adapted for a dual-air conditioning engine according to claim 1, characterized in that, The lower part of the bracket (8) is connected to a transition plate (9), which is pin-connected to the connecting seat (7) via a locking mechanism (10); the locking mechanism (10) includes a pin handle (1001), and the upper and lower parts of the pin handle (1001) are respectively provided with a positioning pin A (1002) and a positioning pin B (1003); the upper and lower parts of the transition plate (9) are respectively provided with positioning pin holes A (901) and B (902) that are adapted to the positioning pins A (1002) and B (1003); Positioning pin A (1002) passes through connecting seat (7) and can be inserted into positioning pin hole A (901), and positioning pin B (1003) passes through connecting seat (7) and can be inserted into positioning pin hole B (902); the pin handle (1001) is connected to a fixing pin (1004) that can be pinned to the connecting rod (6), the end of the connecting rod (6) is inserted into the connecting seat (7), and after the connecting rod (6) is inserted into the connecting seat (7), the fixing pin (1004) can be inserted into the connecting seat (7) and inserted into the connecting rod (6).

9. The idler wheel assembly assembly tooling adapted for a dual-air conditioning engine according to claim 8, characterized in that, The positioning pin holes A (901) are arranged in groups of two, and there is one group; the positioning pin holes B (902) are arranged in groups of two, and there are several groups; the two positioning pin holes A (901) and the two positioning pin holes B (902) in the same group are horizontally spaced 15mm apart; and the several groups of positioning pin holes B (902) are evenly distributed along the arc trajectory. When the positioning pin A (1002) is inserted into the positioning pin hole A (901), the connecting seat (7) can rotate around the positioning pin A (1002) as the axis, so that the positioning pin B (1003) can be inserted into the corresponding positioning pin hole B (902).

10. A method of using an idler wheel assembly assembly tooling adapted for a dual-air conditioning engine according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Tooling positioning: Select the corresponding hole according to the model, fix the bracket (8) to the engine cylinder block, lock the transition plate (9) and the connecting seat (7) through the pin mechanism (10), insert the fixing pin (202) to fix the support arm unit (1) and the connecting rod (6), and align with the assembly station; S2. Place the idler wheel: Place the idler wheel to be installed on the arc-shaped support plate (401) of the moving block (4) and attach it to the appropriate position; S3. Lifting and positioning: Rotate the adjusting bolt (5) to drive the moving block (4) to slide up along the longitudinal beam slide rail and tighten the elastic multi-wedge belt until the proximity switch sensor (1102) senses the position; S4. Locking: The proximity switch sensor (1102) controls the support CPW010 (1101) to lock the moving block (4) with a pin. S5. Secure the idler wheel: Insert a bolt through the semi-circular through hole (404) to fix the idler wheel to the refrigeration compressor bracket; S6. Disassembly of fixtures: Unlock the support pin, rotate the adjusting bolt (5) in the opposite direction to make the moving block (4) fall back and lock, and disassemble the bracket bolt, the locking mechanism (10) and the fixing pin (202) in sequence.

Images