Detection line suitable for urea pump assembly

Abstract

The invention relates to a detection line suitable for urea pump assembly. Comprising a double-layer speed chain conveying line, a jacking positioning mechanism, a first elevator, and a first air tightness detection station, a first defective product removing mechanism, a wiring harness arrangement station, an upper cover locking station, a lower cover locking station, a second air tightness detection station and a second defective product removing mechanism which are sequentially arranged along the double-layer speed chain conveying line from front to back, a comprehensive performance detection station is arranged on one side of the tail end of the double-layer speed chain conveying line, the detection procedure and the assembly procedure of the urea pump are mixed together, detection and assembly of the urea pump can be carried out at the same time through transmission of a speed chain to products and cooperation of specific detection equipment, the detection efficiency of the urea pump is improved, and the production efficiency is improved. The production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of urea pump detection, in particular to a detection line suitable for urea pump assembly. Background Art

[0002] Currently, most mainstream urea pump production lines have a low degree of automation and rely heavily on manual assembly. This is mainly due to the extremely irregular shapes, sizes, and textures of different urea pump parts, and the high requirements for the assembly sequence. After the main components of the urea pump are assembled, they need to undergo air tightness testing, protection level testing, and comprehensive performance testing to facilitate product assembly and testing and improve production efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is a high degree of automation, which greatly reduces manpower and material resources and ensures the consistency and stability of the product. In view of the above shortcomings, a detection line suitable for urea pump assembly is provided.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A testing line suitable for urea pump assembly, comprising a double-layer double-speed chain conveyor line, a lifting and positioning mechanism, a first hoist, a first air tightness testing station arranged in sequence from front to back along the double-layer double-speed chain conveyor line, a first defective product rejection mechanism, a harness tidying station, an upper cover locking station, a lower cover locking station, a second air tightness testing station, a second defective product rejection mechanism, a waterproof and breathable cap assembly station and a second hoist. A comprehensive performance testing station is provided on one side of the tail end of the double-layer double-speed chain conveyor line. The lifting and positioning mechanism is used to position and fix the tooling plate after detecting the tooling plate. The tooling plate is used to fix and place the urea pump assembly delivered from the previous assembly line. The lifting and positioning mechanism is used to detect that the urea pump assembly is placed after The tooling plate with the urea pump assembly installed is lifted and transported to the lifting mechanism. The first hoist is used to transport the tooling plate with the urea pump assembly installed to the upper conveyor line of the double-layer double-speed chain conveyor line after detecting the tooling plate with the urea pump assembly installed. The double-layer double-speed chain conveyor line is used to transport the tooling plate with the urea pump assembly installed to the air tightness detection station through the upper conveyor line. The first air tightness detection station is used to detect the air tightness inside the urea pump assembly after detecting the urea pump assembly, and send a permission signal to the first defective product rejection mechanism when the test is qualified, and send a non-permitted signal to the first defective product rejection mechanism when the test is unqualified. The first defective product rejection mechanism is used to reject defective products that fail to meet the air tightness requirements after receiving the non-permitted signal. The qualified urea pump assembly is transported to the corresponding defective product storage cabinet, the upper conveying line is used to sequentially convey the qualified air-tightness qualified urea pump assembly to the wire harness sorting station, the upper cover locking station and the lower cover locking station, the upper cover locking station is used to install the upper cover on the urea pump assembly and lock it, the lower cover locking station is used to install the lower cover on the urea pump assembly and lock it, the upper conveying line is used to convey the urea pump assembly with the lower cover installed to the second air-tightness detection station, the second air-tightness detection station is used to detect the air-tightness between the urea pump assembly and the upper cover and the lower cover after detecting the urea pump assembly with the lower cover installed, and send a pass-through signal to the second defective product rejection mechanism when the detection is qualified, and send a pass-through signal to the second defective product rejection mechanism when the detection is unqualified. A no-pass signal is sent to the second defective product rejection mechanism. The second defective product rejection mechanism is used to transport the defective urea pump assembly with unqualified air tightness to the corresponding defective product storage cabinet after receiving the no-pass signal and alarm to wait for processing. The upper conveying line is used to transport the qualified air tightness urea pump assembly to the waterproof breathable cap assembly station. The waterproof breathable cap assembly station is used to install the waterproof breathable cap on the urea pump assembly to form a complete urea pump after detecting that the air tightness of the urea pump assembly is qualified. The comprehensive performance testing station is used to remove the complete urea pump from the tooling plate to test various working performances of the complete urea pump and store the defective and qualified products separately, and continue to transport the empty tooling plate forward to the second elevator;The second hoist is used to lower and transport the empty installation plate to the lower conveyor line, and the lower conveyor line is used to reversely transport the tooling plate to the front end of the lower conveyor line. The first hoist is used to descend and lift the tooling plate on the lower conveyor line and transport it to the lifting and positioning mechanism to wait for the urea pump assembly to be placed when the lifting and positioning mechanism does not detect the tooling plate.

[0006] After the defective urea pump assembly at the first defective product rejection mechanism and the second defective product rejection mechanism is processed, the first defective product rejection mechanism and the second defective product rejection mechanism are used to push the empty tooling plate back to the upper conveyor line for circulation.

[0007] The jacking and positioning mechanism is provided with a tooling plate sensor for detecting whether there is a tooling plate, the jacking and positioning mechanism, the first hoist, the first air tightness detection station, the first defective product rejection mechanism, the wire harness sorting station, the upper cover locking station, the lower cover locking station, the second air tightness detection station, the second defective product rejection mechanism, the waterproof and breathable cap assembly station and the urea pump sensor at a preset height on the side of the second hoist. When a urea pump is installed on the tooling plate, the urea pump sensor can detect it and send a signal to the corresponding station, and the corresponding station performs corresponding actions. When an empty tooling plate passes by, the urea pump sensor cannot detect it, and the corresponding station does not perform corresponding actions. The empty tooling plate is directly discharged to pass through, and the upper conveyor line directly conveys the empty tooling plate to the second hoist for circulation.

[0008] Furthermore, the tooling plate includes an inlay, a buffer rubber block, a bottom sensing iron block, a side sensing iron block and a magnetic iron block. A plurality of inlays are provided on the inner side of the positioning hole on the tooling plate. The plurality of inlays are used to cooperate with the jacking positioning mechanism to fix the tooling plate and reduce the wear of the tooling plate. Buffer rubber blocks are provided on the front and rear sides of the tooling plate. The buffer rubber blocks are used to reduce the impact noise between two adjacent tooling plates. The bottom and side surfaces of the tooling plate are respectively provided with a bottom sensing iron block and a side sensing iron block. The bottom sensing iron block and the side sensing iron block are both used to cooperate with the tooling plate sensor to sense the tooling plate. A magnetic iron block is provided on one of the left and right sides of the tooling plate. The magnetic iron block is used to cooperate with the first defective product rejection mechanism and the second defective product rejection mechanism to transfer defective products. The tooling plate is provided with a forward fixing position and a reverse fixing position for placing the urea pump assembly in the forward and reverse directions respectively. The forward fixing position and the reverse fixing position are both composed of a plurality of positioning columns of different heights arranged according to the structure of the urea pump equipment body.

[0009] Furthermore, multiple workstations on the double-layer speed chain conveyor line and the lifting and positioning mechanism are provided with lifting and clamping cylinders for clamping and positioning the tooling plate. When the urea pump sensor of the corresponding workstation detects that a urea pump assembly is installed on the tooling plate, the lifting and clamping cylinder of the corresponding workstation will quickly lift and clamp the tooling plate. When the urea pump sensor does not detect that a urea pump assembly is installed on the tooling plate, the lifting and clamping cylinder will not rise.

[0010] Furthermore, the jacking and positioning mechanism includes a first profile frame, a roller conveyor line, a roller motor and a positioning pin. The roller conveyor line is horizontally arranged on the first profile frame, and a roller motor and a positioning pin are respectively arranged below the roller conveyor line. The roller motor is used to drive the roller conveyor line to rotate in the same direction as the first elevator to transport the tooling plate to the roller conveyor line after the tooling plate sensor does not detect the tooling plate, and the positioning pin is used to lift the positioning tooling plate through between multiple inserts after the tooling plate sensor detects the tooling plate, and the positioning pin is used to descend and release the positioning after the urea pump sensor detects that the urea pump assembly is placed on the tooling plate. The roller motor is used to drive the roller conveyor line to transport the tooling plate to the first elevator after the positioning pin descends.

[0011] Furthermore, the first hoist includes a second profile rack, a belt conveyor mechanism, a drive motor and a lifting cylinder. The lifting cylinder is used to drive the belt conveyor mechanism to descend to be flush with the lower conveyor line when the tooling plate sensor of the jacking and positioning mechanism does not detect the tooling plate. The drive motor is used to drive the belt conveyor mechanism to rotate in the same direction as the lower conveyor line to move the tooling plate onto the belt conveyor mechanism. The lifting cylinder is used to drive the belt conveyor mechanism to rise and reset. The drive motor is used to drive the belt conveyor mechanism to transport the tooling plate to the jacking and positioning mechanism after the belt conveyor mechanism is reset. The drive motor is used to drive the belt conveyor mechanism to rotate in the same direction as the upper conveyor line to transport the tooling plate to the upper conveyor line after the urea pump assembly is placed on the tooling plate on the jacking and positioning mechanism. The structure and operation principle of the second hoist are consistent with those of the first hoist.

[0012] Furthermore, the first defective product rejection mechanism includes a pushing cylinder, an electromagnetic clamp and a defective product storage cabinet. The defective product storage cabinet is located on one side of the upper conveyor line, and the pushing cylinder and the electromagnetic clamp are both located inside the defective product storage cabinet. When the urea pump sensor of the first defective product rejection mechanism detects the defective urea pump assembly, the lifting and clamping cylinder at the first defective product rejection mechanism is used to lift and clamp the tooling plate, and the pushing cylinder is used to push the electromagnetic clamp toward the fixed tooling plate, and the electromagnetic clamp is used to adsorb and clamp the magnetic iron block on the tooling plate. The lifting and clamping cylinder is used to lower and reset after the electromagnetic clamp adsorbs and clamps the tooling plate to release the clamping of the tooling plate, and the pushing cylinder is used to pull the electromagnetic clamp to reset after the lifting and clamping cylinder is lowered and reset. The reset of the electromagnetic clamp drives the tooling plate and the defective urea pump assembly to the inside of the defective product storage cabinet and alarms. The structure and operation principle of the second defective product rejection mechanism are consistent with those of the first defective product rejection mechanism.

[0013] Furthermore, the wiring harness arranging station, upper cover locking station, lower cover locking station and waterproof breathable cap assembly station are all semi-automatic stations. The upper cover locking station is provided with a first locking machine for installing the upper cover, and the lower cover locking station is provided with a second locking machine and a first flipping mechanism. The first flipping mechanism is used to flip the urea pump assembly with the upper cover installed 180 degrees and place it on the reverse fixed position of the tooling plate. The second locking machine is used to install the lower cover on the flipped urea pump assembly. The waterproof breathable cap assembly station is provided with a The second flipping mechanism and the waterproof breathable cap installation mechanism, the second flipping mechanism is used to flip the urea pump assembly with the lower cover installed again by 180 degrees and place it on the positive fixed position of the tooling plate, the waterproof breathable cap installation mechanism is used to install the waterproof breathable cap on the flipped urea pump assembly, the harness tidying station, the upper cover locking station, the lower cover locking station and the waterproof breathable cap assembly station are all provided with a reset button, and when the reset button is triggered, it is used to lower and reset the lifting and clamping cylinder of the corresponding station to release the tooling plate and transport it to the next station.

[0014] Furthermore, the first air tightness testing station and the second air tightness testing station both include an air tightness testing equipment body and an air tightness testing platform, the air tightness testing platform includes a pressing and fixing cylinder, a sealing assembly, a pushing cylinder and a mounting bracket, the air tightness testing platform is provided with a mounting bracket, the mounting bracket is provided with a pushing cylinder, the telescopic end of the pushing cylinder is provided with a sealing assembly, the mounting bracket is provided with two pressing and fixing cylinders located on the left and right sides of the sealing assembly, the sealing assembly of the first air tightness testing station is three sealing joints corresponding to the three valve ports, the sealing assembly of the second air tightness testing station is a single sealing joint corresponding to the waterproof vent, the air tightness testing station is provided with a single sealing joint corresponding to the waterproof vent, and the air tightness testing station is provided with a single sealing joint corresponding to the waterproof vent. An air tightness testing platform is provided on the main body. When the tooling plate on which the urea pump assembly is placed is transported to the air tightness testing station, the lifting and clamping cylinder lifts and fixes the tooling plate. The pressing and fixing cylinder is used to descend and press and fix the urea pump assembly after the tooling plate is fixed. The pushing cylinder is used to push the sealing component to dock and seal with the three valve ports or waterproof vents on the urea pump assembly after the urea pump assembly is fixed. The air tightness testing equipment body is used to inflate air into the inside of the urea pump assembly through the sealing component at the sealing component docking interface to detect the air tightness of the urea pump assembly. During inflation, the pressure is maintained for a certain period of time, and the attenuation of the gas pressure in the pump is read. If the attenuation exceeds the specified value, it is unacceptable, otherwise it is qualified.

[0015] After adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0016] The present invention integrates the inspection and assembly processes of the urea pump. By using a double-speed chain to transport the product and combining it with specific inspection equipment, the inspection and assembly of the urea pump can be performed simultaneously, thereby improving production efficiency. By providing a double-layer double-speed chain conveyor line, a lifting and positioning mechanism, a first hoist, a second hoist, and multiple automated workstations, the post-assembly inspection process of the urea pump is automated, reducing reliance on manual assembly and inspection and improving production efficiency.

[0017] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view schematic diagram of the three-dimensional structure of the overall detection line of the present invention;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the double-layer speed chain conveyor line;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the jacking and positioning mechanism;

[0021] Figure 4 Schematic diagram of the three-dimensional structure of the first hoist;

[0022] Figure 5 It is a structural diagram of the tooling board;

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of the airtightness testing platform.

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 1. Double-layer double-speed chain conveyor line; 101. Upper conveyor line; 102. Lower conveyor line; 2. Lifting and positioning mechanism; 201. First profile rack; 202. Roller conveyor line; 203. Roller motor; 204. Positioning pin; 3. First elevator; 301. Second profile rack; 302. Belt conveyor mechanism; 303. Drive motor; 304. Lifting cylinder; 4. First airtightness test station; 5. First defective product rejection mechanism; 6. Wire harness arrangement station; 7. Upper cover locking station; 8. Lower cover locking station; 9. Second airtightness test station Performance inspection station; 10. Second defective product rejection mechanism; 11. Waterproof breathable cap assembly station; 12. Second elevator; 13. Comprehensive performance inspection station; 14. Tooling plate; 1401. Inlay; 1402. Buffer rubber block; 1403. Bottom sensing iron block; 1404. Side sensing iron block; 1405. Magnetic iron block; 1406. Positioning column; 15. Lifting and clamping cylinder; 16. Airtightness inspection table; 1601. Pressing and fixing cylinder; 1602. Sealing assembly; 1603. Pushing cylinder; 1604. Mounting frame. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise" and "counterclockwise" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] like Figure 1-6As shown, a test line suitable for urea pump assembly includes a double-layer double-speed chain conveyor line 1, a lifting and positioning mechanism 2, a first hoist 3, a first air tightness detection station 4 arranged from front to back along the double-layer double-speed chain conveyor line 1, a first defective product rejection mechanism 5, a harness sorting station 6, an upper cover locking station 7, a lower cover locking station 8, a second air tightness detection station 9, a second defective product rejection mechanism 10, a waterproof and breathable cap assembly station 11 and a second hoist 12. A comprehensive performance detection station 13 is provided on one side of the tail end of the double-layer double-speed chain conveyor line 1. The lifting and positioning mechanism 2 is used to position and fix the tooling plate 14 after detecting the tooling plate 14. The tooling plate 14 is used to fix the urea pump group delivered from the previous assembly line. The urea pump assembly is installed in the upper conveying line 101 of the double-layer double-speed chain conveyor line 1 after the tooling plate 14 with the urea pump assembly is detected to be placed. The lifting and positioning mechanism 2 is used to lift and transport the tooling plate 14 with the urea pump assembly installed to the lifting mechanism after the urea pump assembly is detected to be placed in the upper conveying line 101 of the double-layer double-speed chain conveyor line 1. The double-layer double-speed chain conveyor line 1 is used to transport the tooling plate 14 with the urea pump assembly installed to the air tightness detection station through the upper conveying line 101. The first air tightness detection station 4 is used to detect the air tightness inside the urea pump assembly after the urea pump assembly is detected, and send a pass-through signal to the first defective product rejection mechanism 5 when the detection is qualified, and send a pass-through signal to the first defective product rejection mechanism 5 when the detection is unqualified. The first defective product rejection mechanism 5 is used to transport the defective urea pump assembly with unqualified air tightness to the corresponding defective product storage cabinet after receiving the signal not to pass. The upper conveying line 101 is used to sequentially transport the qualified air tightness urea pump assembly to the harness sorting station 6, the upper cover locking station 7 and the lower cover locking station 8. The upper cover locking station 7 is used to install the upper cover on the urea pump assembly and lock it. The lower cover locking station 8 is used to install the lower cover on the urea pump assembly and lock it. The upper conveying line 101 is used to transport the urea pump assembly with the lower cover installed to the second air tightness detection station 9. The second air tightness detection station 9 is used to detect that the urea pump assembly with the lower cover installed is After the pump assembly is completed, the air tightness between the urea pump assembly and the upper cover and the lower cover is detected, and a pass-allowing signal is sent to the second defective product rejection mechanism 10 when the detection is qualified, and a pass-not-allowing signal is sent to the second defective product rejection mechanism 10 when the detection is unqualified. The second defective product rejection mechanism 10 is used to transport the defective urea pump assembly with unqualified air tightness to the corresponding defective product storage cabinet after receiving the pass-not-allowing signal and alarm to wait for processing. The upper conveying line 101 is used to transport the qualified air tightness good urea pump assembly to the waterproof breathable cap assembly station 11. The waterproof breathable cap assembly station 11 is used to install the waterproof breathable cap on the urea pump assembly to form a complete urea pump after detecting that the urea pump assembly is qualified in air tightness.The comprehensive performance test station is used to remove the complete urea pump from the tooling plate 14 to test the various working performances of the complete urea pump and store defective products and good products separately, and continue to transport the empty tooling plate 14 forward to the second elevator 12; the second elevator 12 is used to lower and transport the empty installation plate to the lower conveyor line 102, and the lower conveyor line 102 is used to reversely transport the tooling plate 14 to the front end of the lower conveyor line 102, and the first elevator 3 is used to descend when the jacking and positioning mechanism 2 does not detect the tooling plate 14, lift the tooling plate 14 on the lower conveyor line 102, and transport it to the jacking and positioning mechanism 2 to wait for the placement of the urea pump assembly.

[0029] After the defective urea pump assembly is processed by the first defective rejecting mechanism 5 and the second defective rejecting mechanism 10, the first defective rejecting mechanism 5 and the second defective rejecting mechanism 10 are used to push the empty tooling plate 14 back to the upper conveying line 101 for circulation.

[0030] The jacking and positioning mechanism 2 is provided with a tooling plate sensor for detecting whether there is a tooling plate 14, and the jacking and positioning mechanism 2, the first hoist 3, the first air tightness detection station 4, the first defective product rejection mechanism 5, the wire harness sorting station 6, the upper cover locking station 7, the lower cover locking station 8, the second air tightness detection station 9, the second defective product rejection mechanism 10, the waterproof and breathable cap assembly station 11 and the urea pump sensor at a preset height on the side of the second hoist 12. When a urea pump is installed on the tooling plate 14, the urea pump sensor can detect it and send a signal to the corresponding station, and the corresponding station performs corresponding actions. When an empty tooling plate 14 passes by, the urea pump sensor cannot detect it, and the corresponding station does not perform corresponding actions. The empty tooling plate 14 is directly discharged to pass through, and the upper conveyor line 101 directly conveys the empty tooling plate 14 to the second hoist 12 for circulation.

[0031] As an embodiment, the tooling plate 14 includes an insert 1401, a buffer rubber block 1402, a bottom sensing iron block 1403, a side sensing iron block 1404 and a magnetic iron block 1405. A plurality of inserts 1401 are provided inside the positioning hole on the tooling plate 14. The plurality of inserts 1401 are used to cooperate with the jacking positioning mechanism to fix the tooling plate and reduce the wear of the tooling plate. Buffer rubber blocks 1402 are provided on both the front and rear sides of the tooling plate 14. The buffer rubber blocks 1402 are used to reduce the impact noise between two adjacent tooling plates. The bottom and side surfaces of the tooling plate 14 are respectively provided with bottom sensing iron blocks 140 3 and side sensing iron blocks 1404, the bottom sensing iron block 1403 and the side sensing iron block 1404 are both used to cooperate with the tooling plate sensor sensing tooling plate 14, and a magnetic iron block 1405 is provided on one of the left and right sides of the tooling plate 14, and the magnetic iron block 1405 is used to cooperate with the first defective product rejection mechanism 5 and the second defective product rejection mechanism 10 to transfer defective products. The tooling plate 14 is provided with a forward fixing position and a reverse fixing position for placing the urea pump assembly in the forward and reverse directions respectively, and the forward fixing position and the reverse fixing position are both composed of a plurality of positioning columns 1406 of different heights arranged according to the structure of the urea pump equipment body.

[0032] As an embodiment, multiple workstations on the double-layer speed chain conveyor line 1 and the lifting and positioning mechanism 2 are provided with lifting and clamping cylinders 15 for clamping and positioning the tooling plate 14. When the urea pump sensor of the corresponding workstation detects that a urea pump assembly is installed on the tooling plate 14, the lifting and clamping cylinder 15 of the corresponding workstation will quickly lift and clamp the tooling plate 14. When the urea pump sensor does not detect that a urea pump assembly is installed on the tooling plate 14, the lifting and clamping cylinder 15 will not lift.

[0033] As an embodiment, the jacking and positioning mechanism 2 includes a first profile frame 201, a roller conveyor line 202, a roller motor 203 and a positioning pin 204. The roller conveyor line 202 is horizontally arranged on the first profile frame, and the roller motor 203 and the positioning pin 204 are respectively arranged below the roller conveyor line 202. The roller motor 203 is used to drive the roller conveyor line 202 to rotate in the same direction as the first elevator 3 after the tooling plate sensor does not detect the tooling plate 14 to transport the tooling plate 14 to the roller conveyor line 202. The positioning pin 204 is used to lift and pass through the positioning tooling plate 14 between multiple inserts 1401 after the tooling plate sensor detects the tooling plate 14. The positioning pin 204 is used to descend and release the positioning after the urea pump sensor detects that the urea pump assembly is placed on the tooling plate 14. The roller motor 203 is used to drive the roller conveyor line 202 to transport the tooling plate 14 to the first elevator 3 after the positioning pin 204 descends.

[0034] As an embodiment, the first lifting machine 3 includes a second profile frame 301, a belt conveyor mechanism 302, a drive motor 303 and a lifting cylinder 304. The lifting cylinder 304 is used to drive the belt conveyor mechanism 302 to descend to be flush with the lower conveyor line 102 when the tooling plate sensor of the jacking and positioning mechanism 2 does not detect the tooling plate 14. The drive motor 303 is used to drive the belt conveyor mechanism 302 to rotate in the same direction as the lower conveyor line 102 to move the tooling plate 14 to the belt conveyor mechanism 302. The cylinder 304 is used to drive the belt conveyor mechanism 302 to rise and reset. The drive motor 303 is used to drive the belt conveyor mechanism 302 to transport the tooling plate 14 to the jacking and positioning mechanism 2 after the belt conveyor mechanism 302 is reset. The drive motor 303 is used to drive the belt conveyor mechanism 302 to rotate in the same direction as the upper conveyor line 101 to transport the tooling plate 14 to the upper conveyor line 101 after the urea pump assembly is placed on the tooling plate 14 on the jacking and positioning mechanism 2. The second hoist 12 has the same structure and operating principle as the first hoist 3.

[0035] As an embodiment, the first defective product rejection mechanism 5 includes a push cylinder, an electromagnetic clamp and a defective product storage cabinet. The defective product storage cabinet is located on one side of the upper conveyor line 101. The push cylinder and the electromagnetic clamp are both located inside the defective product storage cabinet. When the urea pump sensor of the first defective product rejection mechanism 5 detects a defective urea pump assembly, the lifting and clamping cylinder 15 at the first defective product rejection mechanism 5 is used to lift and clamp the tooling plate 14, and the push cylinder is used to push the electromagnetic clamp to the fixed tooling plate 1 4 is close, the electromagnetic clamp is used to absorb and clamp the magnetic iron block 1405 on the tooling plate 14, the lifting and clamping cylinder 15 is used to lower and reset to release the clamping of the tooling plate 14 after the electromagnetic clamp absorbs and clamps the tooling plate 14, and the pushing cylinder is used to pull the electromagnetic clamp to reset after the lifting and clamping cylinder 15 is lowered and reset. The reset of the electromagnetic clamp drives the tooling plate 14 and the defective urea pump assembly to the inside of the defective product storage cabinet and alarms. The second defective product rejection mechanism 10 has the same structure and operating principle as the first defective product rejection mechanism 5.

[0036] As an embodiment, the harness arranging station 6, the upper cover locking station 7, the lower cover locking station 8 and the waterproof breathable cap assembly station 11 are all semi-automatic stations. The upper cover locking station 7 is provided with a first locking machine for installing the upper cover, and the lower cover locking station 8 is provided with a second locking machine and a first flipping mechanism. The first flipping mechanism is used to flip the urea pump assembly with the upper cover installed 180 degrees and place it on the reverse fixed position of the tooling plate. The second locking machine is used to install the lower cover on the flipped urea pump assembly. The waterproof breathable cap assembly station 1 1 is provided with a second flipping mechanism and a waterproof breathable cap installation mechanism. The second flipping mechanism is used to flip the urea pump assembly with the lower cover installed again by 180 degrees and place it on the positive fixed position of the tooling plate. The waterproof breathable cap installation mechanism is used to install the waterproof breathable cap on the flipped urea pump assembly. The harness arranging station 6, the upper cover locking station 7, the lower cover locking station 8 and the waterproof breathable cap assembly station 11 are all provided with a reset button. When the reset button is triggered, it is used to lower and reset the lifting and clamping cylinder of the corresponding station to release the tooling plate and transport it to the next station.

[0037] Specifically, the first locking machine and the second locking machine are electric locking machines manually operated, and the first flipping mechanism and the second flipping mechanism have no mechanical structure, but are both manually flipped to manually flip the urea pump assembly 180 degrees.

[0038] As an embodiment, the first air tightness testing station 4 and the second air tightness testing station 9 both include an air tightness testing device body and an air tightness testing platform 16, the air tightness testing platform 16 includes a pressing and fixing cylinder 1601, a sealing assembly 1602, a pushing cylinder 1603 and a mounting bracket 1604, the air tightness testing platform 16 is provided with a mounting bracket 1604, the pushing cylinder 1603 is installed on the mounting bracket 1604, the telescopic end of the pushing cylinder 1603 is provided with a sealing assembly 1602, the mounting bracket 1604 is provided with two pressing and fixing cylinders 1601 located on the left and right sides of the sealing assembly 1602, the sealing assembly 1602 of the first air tightness testing station 4 is three sealing joints corresponding to the three valve ports, the sealing assembly 1602 of the second air tightness testing station 9 is It is a single sealing joint corresponding to the waterproof vent hole. An airtightness testing platform 16 is provided on the airtightness testing body. When the tooling plate on which the urea pump assembly is placed is transported to the airtightness testing station, the lifting and clamping cylinder lifts and fixes the tooling plate. The pressing and fixing cylinder 1601 is used to lower and press and fix the urea pump assembly after the tooling plate is fixed. The pushing cylinder 1603 is used to push the sealing component 1602 to dock and seal with the three valve ports or waterproof vent holes on the urea pump assembly after the urea pump assembly is fixed. The airtightness testing equipment body is used to inflate the inside of the urea pump assembly through the sealing component 1602 at the docking interface of the sealing component 1602 to detect the airtightness of the urea pump assembly. During inflation, the pressure is maintained for a certain period of time, and the attenuation of the gas pressure in the pump is read. If the attenuation exceeds the specified value, it is unacceptable, otherwise it is qualified.

[0039] The workflow of the present invention is as follows:

[0040] When this inspection line is operating, if the jacking and positioning mechanism 2 detects no empty tooling plate 14, the first hoist 3 descends, lifting the empty tooling plate 14 from the lower conveyor line 102 and transporting it to the jacking and positioning mechanism 2. After the jacking and positioning mechanism 2 detects the tooling plate 14, the positioning pins 204 and the lifting and clamping cylinders 15 lift and secure the tooling plate, awaiting placement of the urea pump assembly. After the urea pump assembly is placed on the tooling plate 14, the jacking and positioning mechanism 2 lifts and transports the tooling plate 14, with the urea pump assembly mounted, to the first hoist 3. The first elevator 3 transports the tooling plate 14 to the upper conveyor line 101 of the double-layer double-speed chain conveyor line 1. The tooling plate 14 passes through the first airtightness test station 4. The lifting and clamping cylinder 15 raises and secures the tooling plate 14. The holding and securing cylinder 1601 descends and secures the urea pump assembly. The push cylinder 1603 pushes the sealing assembly 1602 to mate and seal the three valve ports on the urea pump assembly. The airtightness test equipment body inflates the interior of the urea pump assembly through the sealing assembly 1602 to test the airtightness of the urea pump assembly. During inflation, the pressure is maintained for a certain period of time, and the decay of the gas pressure inside the pump is measured. If the decay exceeds the specified value, the urea pump assembly is deemed defective; otherwise, it is deemed acceptable. If the airtightness is detected as unacceptable, the first defective rejection mechanism 5 transports the defective urea pump assembly to the corresponding defective storage cabinet and issues an alarm for processing. If the airtightness is acceptable, the assembly continues to be transported. The tooling plate 14 is transported to the wiring harness arrangement station 6, where the wiring harness on the urea pump assembly is manually arranged. After the wiring harness is arranged, the reset button is manually pressed, the lifting and clamping cylinder 15 descends to reset and release the tooling plate, and the upper conveyor line 101 conveys the tooling plate 14 to the upper cover locking station 7, and the first locking machine is manually operated to install the upper cover on the urea pump assembly and lock it. After the upper cover is installed, the reset button is manually pressed, the lifting and clamping cylinder 15 descends to reset and release the tooling plate, and the upper conveyor line 101 conveys the tooling plate 14 to the lower cover locking station 8, and the urea pump assembly is manually turned over and placed in reverse, and the second locking machine is operated to install the lower cover on the urea pump assembly and lock it. After the lower cover is installed, the reset button is manually pressed, the lifting and clamping cylinder 15 descends to reset and release the tooling plate, and the upper conveyor line 101 conveys the tooling plate 14 to the second air tightness detection station 9, and the sealing component 1602 is docked with the waterproof vent to detect the air tightness between the urea pump assembly and the upper and lower covers. If the airtightness is unqualified, the second defective rejection mechanism 10 will transport the defective urea pump assembly to the corresponding defective storage cabinet and issue an alarm for processing; if it is qualified, it will continue to be transported. The tooling plate 14 is transported to the waterproof and breathable cap assembly station 11, where the urea pump assembly is manually turned over to the right side and the waterproof and breathable cap is installed to complete the urea pump. After the waterproof and breathable cap is installed, the reset button is manually pressed, and the lifting and clamping cylinder 15 descends to reset and release the tooling plate. The upper conveyor line 101 transports the tooling plate 14 to the comprehensive performance testing station 13, where the complete urea pump is manually removed from the tooling plate 14 to test various working performances, and defective and qualified products are stored separately.The upper conveyor line 101 continues to convey the empty tooling plate 14 to the second elevator 12. After the second elevator 12 detects the empty tooling plate 14, it descends and conveys it to the lower conveyor line 102. The lower conveyor line 102 reversely conveys the tooling plate 14 to the front end of the lower conveyor line 102. When the lifting and positioning mechanism 2 does not detect the tooling plate 14, the first elevator 3 descends to lift the tooling plate 14 on the lower conveyor line 102 and conveys it to the lifting and positioning mechanism 2 to wait for the placement of a new urea pump assembly.

[0041] The defective urea pump assembly at the first defective product rejection mechanism 5 and the second defective product rejection mechanism 10 is taken away by the staff for processing. The first defective product rejection mechanism 5 and the second defective product rejection mechanism 10 push the empty tooling plate 14 back to the upper conveyor line 101 for circulation. The empty tooling plate 14 will not be stopped by the lifting and clamping cylinder 15.

[0042] The foregoing is an example of the best mode of carrying out the present invention. Any portion not described in detail herein is common knowledge within the skill of one of ordinary skill in the art. The scope of protection of the present invention is determined by the claims. Any equivalent transformation based on the technical teachings of the present invention is also within the scope of protection of the present invention.

Claims

1. A test line suitable for urea pump assembly, characterized in that: The invention comprises a double-layer double-speed chain conveyor line (1), a lifting and positioning mechanism (2), a first elevator (3), a first air tightness detection station (4) arranged in sequence from front to back along the double-layer double-speed chain conveyor line (1), a first defective product rejection mechanism (5), a wire harness arrangement station (6), an upper cover locking station (7), a lower cover locking station (8), a second air tightness detection station (9), a second defective product rejection mechanism (10), a waterproof breathable cap assembly station (11) and a second elevator (12), wherein a comprehensive performance detection station (13) is arranged on one side of the tail end of the double-layer double-speed chain conveyor line (1), the lifting and positioning mechanism (2) is used to position and fix the tooling plate (14) after detecting the tooling plate (14), and the tooling plate (14) is used to be fixedly placed The urea pump assembly delivered from the previous assembly line, the lifting and positioning mechanism (2) is used to lift and transport the tooling plate (14) on which the urea pump assembly is installed to the lifting mechanism after detecting that the urea pump assembly is placed, the first hoist (3) is used to transport the tooling plate (14) on which the urea pump assembly is installed to the upper conveying line (101) of the double-layer double-speed chain conveying line (1) after detecting that the tooling plate (14) on which the urea pump assembly is installed, the double-layer double-speed chain conveying line (1) is used to transport the tooling plate (14) on which the urea pump assembly is installed to the air tightness detection station through the upper conveying line (101), the first air tightness detection station (4) is used to detect the air tightness inside the urea pump assembly after detecting the urea pump assembly, and to check the air tightness of the first undetectable urea pump assembly if the detection is qualified. The good product rejection mechanism (5) sends a pass-allowed signal, and sends a not-allowed pass signal to the first bad product rejection mechanism (5) when the detection is unqualified. The first bad product rejection mechanism (5) is used to transport the bad product urea pump assembly with unqualified air tightness to the corresponding bad product storage cabinet after receiving the not-allowed pass signal. The upper conveying line (101) is used to sequentially transport the good product urea pump assembly with qualified air tightness to the harness arrangement station (6), the upper cover locking station (7) and the lower cover locking station (8). The upper cover locking station (7) is used to install the upper cover on the urea pump assembly and lock it. The lower cover locking station (8) is used to install the lower cover on the urea pump assembly and lock it. The upper conveying line (101) is used to transport the good product urea pump assembly with qualified air tightness to the harness arrangement station (6), the upper cover locking station (7) and the lower cover locking station (8). The urea pump assembly is transported to the second air tightness detection station (9). The second air tightness detection station (9) is used to detect the air tightness between the urea pump assembly and the upper cover and the lower cover after detecting the urea pump assembly with the lower cover installed, and send a pass-allowed signal to the second defective product rejection mechanism (10) when the test is qualified, and send a pass-not-allowed signal to the second defective product rejection mechanism (10) when the test is unqualified. The second defective product rejection mechanism (10) is used to transport the defective urea pump assembly with unqualified air tightness to the corresponding defective product storage cabinet after receiving the pass-not-allowed signal and alarm to wait for processing. The upper conveying line (101) is used to transport the qualified urea pump assembly with qualified air tightness to the waterproof breathable cap assembly station (11).The waterproof breathable cap assembly station (11) is used to install the waterproof breathable cap on the urea pump assembly after detecting that the air tightness of the urea pump assembly is qualified to form a complete urea pump. The comprehensive performance testing station is used to remove the complete urea pump from the tooling plate (14) to test the various working performances of the complete urea pump and store defective products and qualified products separately, and continue to transport the empty tooling plate (14) forward to the second elevator (12); the second elevator (12) is used to lower and transport the empty installation plate to the lower conveying line (102), and the lower conveying line (102) is used to reversely transport the tooling plate (14) to the front end of the lower conveying line (102). The first elevator (3) is used to descend when the lifting and positioning mechanism (2) does not detect the tooling plate (14) and lift the tooling plate (14) on the lower conveying line (102) and transport it to the lifting and positioning mechanism (2) to wait for the urea pump assembly to be placed. After the defective urea pump assembly at the first defective product rejection mechanism (5) and the second defective product rejection mechanism (10) is processed, the first defective product rejection mechanism (5) and the second defective product rejection mechanism (10) are used to push the empty tooling plate (14) back to the upper conveying line (101) for circulation. The lifting and positioning mechanism (2) is provided with a tooling plate sensor for detecting whether a tooling plate (14) is present. A urea pump sensor is provided at a preset height on the upper side of the lifting and positioning mechanism (2), the first hoist (3), the first air tightness detection station (4), the first defective product rejection mechanism (5), the harness arrangement station (6), the upper cover locking station (7), the lower cover locking station (8), the second air tightness detection station (9), the second defective product rejection mechanism (10), the waterproof breathable cap assembly station (11) and the second hoist (12). When a urea pump is installed on the tooling plate (14), the urea pump sensor can detect it and send a signal to the corresponding station, and the corresponding station performs a corresponding action. When an empty tooling plate (14) passes by, the urea pump sensor cannot detect it, and the corresponding station does not perform a corresponding action. The empty tooling plate (14) is directly discharged to pass by, and the upper conveying line (101) directly conveys the empty tooling plate (14) to the second hoist (12) for circulation.

2. The detection line suitable for urea pump assembly according to claim 1, characterized in that: The tooling plate (14) comprises an insert (1401), a buffer rubber block (1402), a bottom induction iron block (1403), a side induction iron block (1404) and a magnetic iron block (1405). A plurality of inserts (1401) are provided inside the positioning hole on the tooling plate (14). The plurality of inserts (1401) are used to cooperate with the lifting and positioning mechanism to fix the tooling plate and reduce the wear of the tooling plate. Buffer rubber blocks (1402) are provided on both the front and rear sides of the tooling plate (14). The buffer rubber blocks (1402) are used to reduce the impact noise between two adjacent tooling plates. The bottom surface and side surfaces of the tooling plate (14) are respectively provided with bottom induction iron blocks (1403). and a side sensing iron block (1404), the bottom sensing iron block (1403) and the side sensing iron block (1404) are both used to cooperate with the tooling plate sensor sensing tooling plate (14), one of the left and right sides of the tooling plate (14) is provided with a magnetic iron block (1405), the magnetic iron block (1405) is used to cooperate with the first defective product rejection mechanism (5) and the second defective product rejection mechanism (10) to transfer defective products, and the tooling plate (14) is provided with a forward fixing position and a reverse fixing position for placing the urea pump assembly in the forward and reverse directions respectively, and the forward fixing position and the reverse fixing position are both composed of a plurality of positioning columns (1406) of different heights arranged according to the structure of the urea pump equipment body.

3. The detection line suitable for urea pump assembly according to claim 1, characterized in that: A plurality of workstations on the double-layer double-speed chain conveyor line (1) and the lifting and positioning mechanism (2) are provided with lifting and clamping cylinders (15) for clamping and positioning the tooling plate (14); when the urea pump sensor of the corresponding workstation detects that a urea pump assembly is installed on the tooling plate (14), the lifting and clamping cylinder (15) of the corresponding workstation will quickly lift and clamp the tooling plate (14); when the urea pump sensor does not detect that a urea pump assembly is installed on the tooling plate (14), the lifting and clamping cylinder (15) will not lift.

4. The detection line suitable for urea pump assembly according to claim 3, characterized in that: The lifting and positioning mechanism (2) comprises a first profile frame (201), a roller conveyor line (202), a roller motor (203) and a positioning pin (204); the roller conveyor line (202) is horizontally arranged on the first profile frame; the roller motor (203) and the positioning pin (204) are respectively arranged below the roller conveyor line (202); the roller motor (203) is used to drive the roller conveyor line (202) and the first hoist (3) to rotate in the same direction to lift the tooling board (14) after the tooling board sensor fails to detect the tooling board (14). 4) transported to the roller conveyor line (202), the positioning pin (204) is used to lift up and pass through the positioning tooling plate (14) between the multiple inserts (1401) after the tooling plate sensor detects the tooling plate (14), the positioning pin (204) is used to descend and release the positioning after the urea pump sensor detects that the urea pump assembly is placed on the tooling plate (14), and the roller motor (203) is used to drive the roller conveyor line (202) to transport the tooling plate (14) to the first hoist (3) after the positioning pin (204) descends.

5. The detection line suitable for urea pump assembly according to claim 4, characterized in that: The first hoist (3) comprises a second profile frame (301), a belt conveyor mechanism (302), a drive motor (303) and a lifting cylinder (304), wherein the lifting cylinder (304) is used to drive the belt conveyor mechanism (302) to descend to be flush with the lower conveyor line (102) when the tooling plate sensor of the jacking positioning mechanism (2) does not detect the tooling plate (14), the drive motor (303) is used to drive the belt conveyor mechanism (302) to rotate in the same direction as the lower conveyor line (102) to move the tooling plate (14) onto the belt conveyor mechanism (302), and the lifting cylinder (304) is used to drive the belt conveyor mechanism (302) to rotate in the same direction as the lower conveyor line (102) to move the tooling plate (14) onto the belt conveyor mechanism (302). The drive motor (303) is used to drive the belt conveyor mechanism (302) to rise and reset, and the drive motor (303) is used to drive the belt conveyor mechanism (302) to transport the tooling plate (14) to the lifting and positioning mechanism (2) after the belt conveyor mechanism (302) is reset. The drive motor (303) is used to drive the belt conveyor mechanism (302) to rotate in the same direction as the upper conveyor line (101) to transport the tooling plate (14) to the upper conveyor line (101) after the urea pump assembly is placed on the tooling plate (14) on the lifting and positioning mechanism (2). The second hoist (12) has the same structure and operating principle as the first hoist (3).

6. The detection line suitable for urea pump assembly according to claim 1, characterized in that: The first defective product rejection mechanism (5) includes a push cylinder, an electromagnetic clamp and a defective product storage cabinet, the defective product storage cabinet is located on one side of the upper conveyor line (101), and the push cylinder and the electromagnetic clamp are both located inside the defective product storage cabinet. When the urea pump sensor of the first defective product rejection mechanism (5) detects a defective urea pump assembly, the lifting and clamping cylinder (15) at the first defective product rejection mechanism (5) is used to lift and clamp the tooling plate (14), the push cylinder is used to push the electromagnetic clamp toward the fixed tooling plate (14), and the electromagnetic clamp is used to lift and clamp the tooling plate (14). The tool is used to absorb and clamp the magnetic iron block (1405) on the tooling plate (14); the lifting and clamping cylinder (15) is used to lower and reset the electromagnetic clamp after the electromagnetic clamp absorbs and clamps the tooling plate (14) to release the clamping fixation of the tooling plate (14); the pushing cylinder is used to pull the electromagnetic clamp to reset after the lifting and clamping cylinder (15) is lowered and reset; the electromagnetic clamp reset drives the tooling plate (14) and the defective urea pump assembly to move to the inside of the defective product storage cabinet and alarm; the second defective product rejection mechanism (10) is consistent with the first defective product rejection mechanism (5) in structure and operation principle.

7. The detection line suitable for urea pump assembly according to claim 1, characterized in that: The harness arranging station (6), the upper cover locking station (7), the lower cover locking station (8) and the waterproof breathable cap assembly station (11) are all semi-automatic stations. The upper cover locking station (7) is provided with a first locking machine for installing the upper cover. The lower cover locking station (8) is provided with a second locking machine and a first flipping mechanism. The first flipping mechanism is used to flip the urea pump assembly with the upper cover installed 180 degrees and place it on the reverse fixed position of the tooling plate. The second locking machine is used to install the lower cover on the flipped urea pump assembly. The waterproof breathable cap assembly station (11) is provided with a second locking machine and a first flipping mechanism. A second flipping mechanism and a waterproof breathable cap installation mechanism are provided. The second flipping mechanism is used to flip the urea pump assembly with the lower cover installed again by 180 degrees and place it on the positive fixed position of the tooling plate. The waterproof breathable cap installation mechanism is used to install the waterproof breathable cap on the flipped urea pump assembly. The harness arranging station (6), the upper cover locking station (7), the lower cover locking station (8) and the waterproof breathable cap assembly station (11) are all provided with a reset button. When the reset button is triggered, it is used to lower and reset the lifting and clamping cylinder of the corresponding station to release and transport the tooling plate to the next station.

8. The detection line suitable for urea pump assembly according to claim 1, characterized in that: The first air tightness testing station (4) and the second air tightness testing station (9) both include an air tightness testing device body and an air tightness testing platform (16), the air tightness testing platform (16) including a pressing and fixing cylinder (1601), a sealing component (1602), a pushing cylinder (1603) and a mounting frame (1604), the air tightness testing platform (16) is provided with a mounting frame (1604), the pushing cylinder (1603) is mounted on the mounting frame (1604), the telescopic end of the pushing cylinder (1603) is provided with a sealing component (1602), the mounting frame (1604) is provided with two pressing and fixing cylinders (1601) located on the left and right sides of the sealing component (1602), the sealing component (1602) of the first air tightness testing station (4) is three sealing joints corresponding to the three valve ports, the sealing component (1602) of the second air tightness testing station (9) is The sealing component (1602) is a single sealing joint corresponding to the waterproof vent hole. The air tightness detection body is provided with an air tightness detection platform (16). When the tooling plate on which the urea pump assembly is placed is transported to the air tightness detection station, the lifting and clamping cylinder lifts and fixes the tooling plate. The pressing and fixing cylinder (1601) is used to lower and press and fix the urea pump assembly after the tooling plate is fixed. The pushing cylinder (1603) is used to push the sealing component (1602) to dock and seal with the three valve ports or waterproof vent holes on the urea pump assembly after the urea pump assembly is fixed. The air tightness detection device body is used to inflate the inside of the urea pump assembly through the sealing component (1602) at the sealing component (1602) docking interface to detect the air tightness of the urea pump assembly. During inflation, the pressure is maintained for a certain period of time, and the attenuation of the gas pressure in the pump is read. If the attenuation exceeds the specified value, it is unacceptable, otherwise it is qualified.

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