Motorcycle exhaust catalyst test device

Abstract

The present application relates to the technical field of motorcycle exhaust test, and discloses a motorcycle exhaust catalyst test device, which comprises a test table, a mounting column arranged above the test table, two rotating shafts fixed at the two ends of the mounting column, the two rotating shafts being rotatably installed on the top surface of the test table, a clamp installed on the mounting column, a positioning assembly arranged at one end of the test table and used for locking the position of the mounting column, a pushing assembly arranged at one end of the test table and used for driving the mounting column to rotate, and a cooling assembly arranged at the other end of the test table.The cooling assembly actively cools the tested exhaust pipe, the gas generated by the impeller during the test is stored by the gas storage structure, after the test is completed, the high-pressure gas is sprayed out through the spray hole of the spray pipe by the control structure, directly acts on the high-temperature exhaust pipe, and the exhaust pipe can be quickly removed from the clamp for the next test preparation, so that the idle waiting time of the device is reduced, and the overall work efficiency and productivity are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of motorcycle exhaust testing technology, and more particularly to a motorcycle exhaust catalyst testing device. Background Technology

[0002] The motorcycle exhaust catalyst test device is an experimental device used to test and evaluate the performance of catalysts in motorcycle exhaust systems. Its core function is to detect the conversion efficiency of the catalyst for pollutants in exhaust gas by simulating actual working conditions, and to verify its durability and reliability.

[0003] In the existing technology, when testing motorcycle exhaust catalysts, high-temperature gas needs to be injected into the motorcycle exhaust pipe to simulate the normal operation of the motorcycle. During the test, the temperature of the exhaust pipe continues to rise. After the test, it is necessary to wait for the exhaust pipe to cool down naturally before it can be removed from the test device and the next round of testing can be carried out. Natural cooling takes a long time, which will affect the working efficiency of the test device.

[0004] Therefore, it is necessary to design a motorcycle exhaust catalytic converter testing device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a motorcycle exhaust catalyst testing device.

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

[0007] A motorcycle exhaust catalytic converter testing device includes a test platform. A mounting column is positioned above the test platform, with rotating shafts fixed at both ends. Both rotating shafts are rotatably mounted on the top surface of the test platform. A clamp is mounted on the mounting column. A positioning component is located at one end of the test platform to lock the position of the mounting column. A pushing component is located at another end of the test platform to drive the mounting column to rotate. A cooling component is located at the other end of the test platform to cool the exhaust pipe after testing. The cooling component includes a jet pipe fixed to the test platform. The jet pipe has several jet holes, each facing a set of clamps located inside the test platform. After testing, the jet holes eject gas, actively cooling the exhaust pipe located inside the test platform.

[0008] As a preferred embodiment of the present invention, the positioning component includes a fixed plate and a side plate. The fixed plate is fixedly sleeved on one of the rotating shafts. The fixed plate has two slots, which are arranged vertically opposite each other. The side plate is fixed to the side of the test platform. A movable rod is slidably arranged on the side plate. The movable rod is connected to the side plate by a first spring. A protrusion is fixed on the movable rod.

[0009] As a preferred embodiment of the present invention, the pushing assembly includes a gear and a slide rail. The gear is fixedly sleeved on one of the rotating shafts. The slide rail is fixed to the side of the test bench. A slide block is slidably disposed on the slide rail. A sliding plate is fixed to the side of the slide block. A guide groove is provided on the side of the sliding plate. A push rod is fixed to the side of the sliding plate. A vertical rod is fixed on the push rod. A rack is fixed to the end of the vertical rod away from the push rod. The rack is positioned opposite the gear.

[0010] As a preferred embodiment of the present invention, the guide groove is composed of two inclined sections and one horizontal section. The two inclined sections are located at the two ends of the horizontal section, and both inclined sections are inclined in opposite directions. In the initial state, one of the inclined sections is positioned directly opposite the protrusion.

[0011] In a preferred embodiment of the present invention, during the meshing process of the gear and the rack, the rack drives the gear to rotate 180°.

[0012] As a preferred embodiment of the present invention, a fixing plate is fixed on another rotating shaft, and an inclined surface is provided on the fixing plate. The cooling assembly also includes an air supply structure, an air storage structure and a control structure.

[0013] The gas supply structure is used for gas supply. The gas supply structure includes a vertical plate and a mounting cylinder. The vertical plate is fixed on the test bench. A rotating rod is rotatably installed on the side of the vertical plate. An eccentric wheel is fixedly sleeved on the rotating rod. An impeller is fixed at the end of the rotating rod away from the vertical plate. The mounting cylinder is fixed to the side of the vertical plate. A sliding plug is slidably connected to the inside of the mounting cylinder. The sliding plug and the mounting cylinder are connected by a second spring. A fixing rod is fixed to the top of the sliding plug, and the fixing rod is positioned directly opposite the eccentric wheel. Two mounting pipes are installed on the mounting cylinder, and a one-way valve is installed on each of the two mounting pipes.

[0014] As a preferred embodiment of the present invention, the gas storage structure includes a gas storage cylinder, which is fixed to the side of the test bench. A sliding plate is slidably connected inside the gas storage cylinder, and the sliding plate is connected to the inner surface of the gas storage cylinder by a third spring. The gas storage cylinder is connected to one end of an installation pipe away from the sealing cylinder, and a connecting pipe is connected to the gas storage cylinder.

[0015] As a preferred embodiment of the present invention, the control structure includes a sealing cylinder, which is fixed to the end of the connecting pipe away from the gas storage cylinder and is connected to the connecting pipe. An exhaust pipe is connected to the sealing cylinder, and the end of the exhaust pipe away from the sealing cylinder is connected to the jet pipe. A movable block is slidably arranged inside the sealing cylinder, and the movable block is connected to the inner surface of the sealing cylinder by a fourth spring. A top rod is fixed to the top of the movable block, and the end of the top rod away from the movable block extends to the outside of the sealing cylinder, with the top rod facing the fixed plate.

[0016] As a preferred embodiment of the present invention, the outer surface of the movable block is in contact with the inner surface of the sealing cylinder.

[0017] As a preferred embodiment of the present invention, the two one-way valves have opposite flow-limiting directions.

[0018] The present invention has the following beneficial effects:

[0019] 1. In this invention, the exhaust pipe is actively cooled by the cooling component after testing, and the gas generated by the impeller drive during the test is stored by the gas storage structure. After the test, the high-pressure gas is ejected through the jet hole of the jet pipe by the control structure and directly acts on the high-temperature exhaust pipe, which shortens the cooling time and allows the exhaust pipe to be removed from the fixture as soon as possible to prepare for the next round of testing. This reduces the idle waiting time of the device and significantly improves the overall work efficiency and production capacity.

[0020] 2. In this invention, the positioning component uses a movable rod to engage with the slot in the fixed plate to fix the position of the mounting column and the clamp, preventing the exhaust pipe from shaking during testing and ensuring the accuracy and reliability of the test data. The pushing component moves the sliding plate through the push rod, and the protrusion slides along the guide groove, first causing the movable rod to disengage from the groove, and then driving the mounting column to rotate 180° through the meshing of the rack and gear. Finally, the movable rod engages with another slot to fix the mounting column, realizing the automatic and precise flipping of the mounting column, which is convenient and efficient to operate.

[0021] 3. In this invention, a rubber seat is provided on the top surface of the test platform, and a rubber sleeve is fixed on the rotating shaft. The contact between the two generates a large frictional force, which can overcome the rotational inertia of the mounting column, prevent it from rotating excessively, and ensure that the groove of the mounting column is aligned with the movable rod after rotating 180°, so as to ensure that the movable rod can be smoothly inserted and achieve precise positioning and fixation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the motorcycle exhaust catalyst testing device proposed in this invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the motorcycle exhaust catalyst testing device proposed in this invention. Figure 2 ;

[0024] Figure 3 for Figure 2 Enlarged view of the structure at point A;

[0025] Figure 4 This is a structural diagram of the positioning component and the pushing component;

[0026] Figure 5 This is a schematic diagram of the gas supply structure;

[0027] Figure 6 This is a schematic diagram of the gas storage structure and control structure.

[0028] Figure 7 This is a schematic diagram of the structure when the movable block and the exhaust pipe are staggered.

[0029] Figure 8 This is a schematic diagram of the sliding plate and guide groove.

[0030] In the diagram: 1. Test bench; 2. Mounting column; 21. Rotating shaft; 211. Fixing plate; 22. Clamp; 31. Fixing disc; 311. Slot; 32. Side plate; 33. Movable rod; 331. Protrusion; 34. First spring; 41. Gear; 42. Slide rail; 43. Sliding plate; 431. Guide groove; 44. Push rod; 45. Vertical rod; 46. Rack; 51. Vertical plate; 52. Rotating rod; 521. Eccentric wheel; 53. Impeller; 61. Mounting cylinder; 62. Sliding plug; 63. Second spring; 64. Fixing rod; 65. Mounting pipe; 66. One-way valve; 71. Air storage cylinder; 72. Slide plate; 73. Third spring; 74. Connecting pipe; 75. Sealing cylinder; 751. Movable block; 752. Fourth spring; 753. Top rod; 76. Exhaust pipe; 77. Jet pipe; 771. Jet hole. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Example 1: This is the motorcycle exhaust catalytic converter test device disclosed in this example, referring to... Figure 1-8The test platform includes a test bench 1, with a mounting column 2 on top of the test bench 1. Both ends of the mounting column 2 are fixed with rotating shafts 21, and both rotating shafts 21 are rotatably mounted on the top surface of the test bench 1. A clamp 22 is mounted on the mounting column 2. A cooling assembly is provided at the other end of the test bench 1 to cool the exhaust pipe 76 after testing. The cooling assembly includes a jet pipe 77, which is fixed on the test bench 1. The jet pipe 77 has several jet holes 771, each of which is positioned directly opposite a set of clamps 22 located inside the test bench 1. After the test is completed, the several jet holes 771 spray gas and actively cool the exhaust pipe 76 located inside the test bench 1.

[0033] When testing the catalyst in a motorcycle exhaust pipe, the device uses a precious metal catalyst on the catalyst carrier to trigger the oxidation-reduction reaction of harmful substances in the exhaust gas under specific temperature and exhaust composition conditions. Temperature sensors installed before and after the catalyst are used to monitor its operating temperature to ensure that the catalyst is within the effective activation range. At the same time, an oxygen sensor is used to detect the oxygen content in the exhaust gas in real time to test the catalyst. The specific testing principle is existing technology and will not be elaborated on here.

[0034] Another rotating shaft 21 is fixed with a fixing plate 211, and the fixing plate 211 is provided with an inclined surface. The cooling assembly also includes an air supply structure, an air storage structure and a control structure.

[0035] The gas supply structure is used for gas supply. The gas supply structure includes a vertical plate 51 and an installation cylinder 61. The vertical plate 51 is fixed on the test bench 1. A rotating rod 52 is rotatably installed on the side of the vertical plate 51. An eccentric wheel 521 is fixedly sleeved on the rotating rod 52. An impeller 53 is fixed at the end of the rotating rod 52 away from the vertical plate 51. The installation cylinder 61 is fixed to the side of the vertical plate 51. A sliding plug 62 is slidably connected inside the installation cylinder 61. The sliding plug 62 and the installation cylinder 61 are connected by a second spring 63. A fixing rod 64 is fixed at the top of the sliding plug 62, and the fixing rod 64 is set directly opposite to the eccentric wheel 521. Two installation pipes 65 are installed on the installation cylinder 61. A one-way valve 66 is installed on each of the two installation pipes 65. The flow limiting directions of the two one-way valves 66 are opposite.

[0036] The gas storage structure includes a gas storage cylinder 71, which is fixed to the side of the test bench 1. A sliding plate 72 is slidably connected inside the gas storage cylinder 71, and the sliding plate 72 is connected to the inner surface of the gas storage cylinder 71 via a third spring 73. The gas storage cylinder 71 is connected to one end of an mounting pipe 65 away from the sealing cylinder 75. A connecting pipe 74 is connected to the gas storage cylinder 71. The control structure includes a sealing cylinder 75, which is fixed to the end of the connecting pipe 74 away from the gas storage cylinder 71, and the sealing cylinder 75 is connected to the connecting pipe 74. An exhaust pipe 76 is connected to the sealing cylinder 75. The end of the exhaust pipe 76 away from the sealing cylinder 75 is connected to the jet pipe 77. A movable block 751 is slidably arranged inside the sealing cylinder 75. The outer surface of the movable block 751 is in contact with the inner surface of the sealing cylinder 75. The movable block 751 and the inner surface of the sealing cylinder 75 are connected by a fourth spring 752. A push rod 753 is fixed to the top of the movable block 751. The end of the push rod 753 away from the movable block 751 extends to the outside of the sealing cylinder 75, and the push rod 753 is positioned directly opposite the fixing plate 211.

[0037] The implementation principle of this embodiment is as follows: When the motorcycle exhaust catalyst testing device proposed in this invention is in use, in the initial state, one set of clamps 22 is located above the test bench 1, and the other set of clamps 22 is located inside the test bench 1, with the two sets of clamps 22 facing each other. During testing, the operator first installs the exhaust pipe 76 containing the catalyst onto the clamps 22 located above the test bench 1, forming the following configuration: Figure 1 The catalyst was then tested, and the specific testing principle is based on existing technology and will not be elaborated upon here. During the test, high-velocity gas was ejected from the exhaust pipe 76. Since the exhaust pipe 76 is positioned directly opposite the impeller 53, the gas ejected from the exhaust pipe 76 can drive the impeller 53 to rotate, causing the impeller 53 to drive the rotating rod 52 to rotate. When the rotating rod 52 rotates, the eccentric wheel 521 on it rotates accordingly. During the rotation, the eccentric wheel 521 can periodically press down on the fixed rod 64, causing the fixed rod 64 to drive the sliding plug 62 to move up and down reciprocally inside the sealing cylinder 75. Two mounting pipes 65 are installed on the mounting cylinder 61, and one-way valves 66 are installed on both mounting pipes 65, with the flow limiting directions of the two one-way valves 66 being opposite. Conversely, specifically, one of the one-way valves 66 restricts gas from entering the sealing cylinder 75, while the other one-way valve 66 restricts gas from flowing out of the sealing cylinder 75. Therefore, when the sliding plug 62 moves downward inside the sealing cylinder 75, the sliding plug 62 can force the gas inside the sealing cylinder 75 out through the corresponding mounting pipe 65. At this time, the sealing cylinder 75 performs an exhaust action. When the sliding plug 62 moves upward inside the sealing cylinder 75, the sliding plug 62 can draw air from the external environment through the corresponding mounting pipe 65 and draw the gas into the sealing cylinder 75. At this time, the sealing cylinder 75 performs a evacuation action. In summary, during the test, the sealing cylinder 75 will continuously supply gas to the gas storage cylinder 71, causing the gas to accumulate inside the gas storage cylinder 71.

[0038] Regarding the gas storage cylinder 71 and the sealing cylinder 75, in the initial state, such as Figure 6 As shown, under the elastic force of the fourth spring 752, the movable block 751 is positioned directly opposite the exhaust pipe 76. At this time, the movable block 751 can block the connecting pipe 74 and the exhaust pipe 76, preventing the gas in the gas storage cylinder 71 from entering the sealing cylinder 75. Therefore, the gas will continuously accumulate in the gas storage cylinder 71, causing the internal air pressure of the gas storage cylinder 71 to continuously increase. As the gas increases, the gas will push the sliding plate 72 downward, causing the sliding plate 72 to compress the third spring 73. After the test, the operator controls the installation column 2 to rotate, causing the installation column 2 to rotate 180 degrees. When the installation column 2 rotates, it can drive the two rotating shafts 21 to rotate. The fixed plate 211 on one of the rotating shafts 21 rotates accordingly. During the rotation of the fixed plate 211, its inclined surface will squeeze the top rod 753, causing the top rod 753 to drive the movable block 751 downward until the movable block 751 moves to a state that is misaligned with the connecting pipe 74, forming a state as shown. Figure 7 In the state shown, the movable block 751 no longer blocks the connecting pipe 74. The high-pressure gas in the gas storage cylinder 71 can enter the sealing cylinder 75 through the connecting pipe 74, and then enter the jet pipe 77 through the exhaust pipe 76. Finally, it is ejected through several jet holes 771. In addition, when the mounting column 2 rotates 180°, the exhaust pipe 76 rotates exactly into the interior of the test platform 1 and is positioned directly opposite the jet pipe 77. At this time, the gas ejected from the several jet holes 771 can actively cool the high-temperature exhaust pipe 76, so that the exhaust pipe 76 after the test can be cooled quickly, making it convenient for the staff to remove the exhaust pipe 76 after the test from the clamp 22. Compared with the traditional natural cooling method, the solution proposed in this invention has the function of actively cooling the exhaust pipe 76 after the test, which can shorten the cooling time of the exhaust pipe 76 and improve the working efficiency of the device.

[0039] After cooling is complete, the staff rotates the mounting column 2 in the opposite direction to reset the cooled exhaust pipe 76. Finally, the exhaust pipe 76 can be removed from the clamp 22.

[0040] Example 2: Based on Example 1, this example discloses a motorcycle exhaust catalytic converter testing device, such as... Figure 1 As shown, a positioning component is provided at one end of the test platform 1 to lock the position of the mounting column 2, and a pushing component is provided at the other end of the test platform 1 to drive the mounting column 2 to rotate. The positioning component includes a fixed plate 31 and a side plate 32. The fixed plate 31 is fixedly sleeved on one of the rotating shafts 21. Two slots 311 are opened on the fixed plate 31, and the two slots 311 are arranged vertically opposite each other. The side plate 32 is fixed to the side of the test platform 1. A movable rod 33 is slidably arranged on the side plate 32. The movable rod 33 is connected to the side plate 32 by a first spring 34. A protrusion 331 is fixed on the movable rod 33.

[0041] The driving assembly includes a gear 41 and a slide rail 42. The gear 41 is fixedly mounted on one of the rotating shafts 21. The slide rail 42 is fixed to the side of the test bench 1. A slide block is slidably mounted on the slide rail 42. A sliding plate 43 is fixed to the side of the slide block. A guide groove 431 is provided on the side of the sliding plate 43. The guide groove 431 consists of two inclined sections and one horizontal section. The two inclined sections are located at the two ends of the horizontal section. Both inclined sections are inclined and their inclination directions are opposite. In the initial state, one of the inclined sections is positioned directly opposite the protrusion 331. A push rod 44 is fixed to the side of the sliding plate 43. A vertical rod 45 is fixed to the push rod 44. A rack 46 is fixed to the end of the vertical rod 45 away from the push rod 44. The rack 46 is positioned directly opposite the gear 41. During the meshing process of the gear 41 and the rack 46, the rack 46 drives the gear 41 to rotate 180°.

[0042] The implementation principle of this embodiment is as follows: This invention designs a positioning component and a pushing component for quickly adjusting the position of the mounting column 2. Specifically, in the initial state, the movable rod 33 is inserted into one of the slots 311. At this time, the movable rod 33 fixes the fixed plate 31. When the fixed plate 31 is fixed, the mounting column 2 and the clamp 22 are also fixed, thereby ensuring the positional stability of the exhaust pipe 76 during the test and preventing the exhaust pipe 76 from shaking. When it is necessary to flip the mounting column 2, the operator pushes the push rod 44. When the push rod 44 moves, it drives the sliding plate 43 to move. At the same time, the vertical rod 45 drives the rack 46 to move. During the movement of the sliding plate 43, the protrusion 331 on the movable rod 33 will first slide into the inclined part at one end of the guide groove 431 and slide along the inclined part. This causes the movable rod 33 to move downward and disengage from the corresponding slot 311. Then the protrusion 331 will slide along the inclined part. As the protrusion 331 slides along the horizontal section, the rack 46 meshes with the gear 41, driving the gear 41 to rotate. When the gear 41 rotates, it drives the corresponding rotating shaft 21 to rotate, ultimately causing the mounting post 2 to rotate and achieve automatic flipping of the mounting post 2. Before the protrusion 331 slides to another inclined section, the gear 41 and rack 46 disengage. At this time, the mounting post 2 has just rotated 180°. Further, the protrusion 331 slides to another inclined section and slides along this inclined section. Since the mounting post 2 has rotated 180°, the two slots 311 on the mounting plate will also rotate 180°. This causes the other slot 311 to rotate to the position directly opposite the movable rod 33. Therefore, as the protrusion 331 slides along the other inclined section, the movable rod 33 will move upward and engage in the other slot 311, thus fixing the mounting post 2.

[0043] Example 3: Based on Example 1, this example discloses a motorcycle exhaust catalytic converter testing device, such as... Figure 1As shown, a rubber seat is fixed on the top surface of the test bench 1, and a rubber sleeve is fixedly fitted on one of the rotating shafts 21. The rubber sleeve is in contact with the rubber seat, and an arc surface adapted to the rubber sleeve is opened on the rubber seat. This gives the rubber seat and the rubber sleeve a large friction force. This friction force can overcome the excessive rotation caused by inertia during the rotation of the mounting column 2, and ensure that the slot 311 of the mounting column 2 can be rotated to the position directly opposite the movable rod 33 after rotating 180°, so that the movable rod 33 can be smoothly inserted into the slot 311.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A motorcycle exhaust catalyst test device characterized by, Including test platform (1), the top of test platform (1) is provided with mounting column (2), both ends of mounting column (2) are fixed with rotating shaft (21), two rotating shafts (21) are rotatably installed on the top surface of test platform (1), clamp (22) is installed on mounting column (2), one end of test platform (1) is provided with positioning assembly and push assembly, positioning assembly is used for locking the position of mounting column (2), push assembly is used for driving mounting column (2) to rotate, the other end of test platform (1) is provided with cooling assembly, which is used for cooling exhaust pipe (76) after testing, the cooling assembly includes air jet pipe (77), air jet pipe (77) is fixed on test platform (1), a plurality of air jet holes (771) are formed in air jet pipe (77), each air jet hole (771) is opposite to a group of clamps (22) located in the inside of test platform (1), after testing, a plurality of air jet holes (771) spray gas, and the exhaust pipe (76) located in the inside of the test platform (1) is actively cooled; The positioning assembly includes fixed disc (31) and side plate (32), the fixed disc (31) is fixedly sleeved on one of the rotating shafts (21), and the other rotating shaft (21) is fixedly provided with a fixed plate (211), the fixed plate (211) is provided with an inclined surface, the cooling assembly further includes a gas supply structure, a gas storage structure and a control structure; The gas supply structure is used for supplying gas, and includes a vertical plate (51) and an installation cylinder (61), the vertical plate (51) is fixed on the test platform (1), a rotating shaft (52) is rotatably installed on the side surface of the vertical plate (51), an eccentric wheel (521) is fixedly sleeved on the rotating shaft (52), a blade wheel (53) is fixed on the end of the rotating shaft (52) away from the vertical plate (51), the installation cylinder (61) is fixed on the side surface of the vertical plate (51), a sliding plug (62) is sealingly and slidably connected in the installation cylinder (61), the sliding plug (62) and the installation cylinder (61) are connected through a second spring (63), a fixed rod (64) is fixed on the top end of the sliding plug (62), and the fixed rod (64) is opposite to the eccentric wheel (521), two installation pipes (65) are installed on the installation cylinder (61), and a one-way valve (66) is installed on each of the two installation pipes (65).

2. The motorcycle exhaust catalyst testing device according to claim 1, characterized by Two grooves (311) are formed in the fixed disc (31), and the two grooves (311) are opposite to each other in an up-down direction, the side plate (32) is fixed on the side surface of the test platform (1), a movable rod (33) is slidably arranged on the side plate (32), the movable rod (33) and the side plate (32) are connected through a first spring (34), and a protruding block (331) is fixed on the movable rod (33).

3. The motorcycle exhaust catalyst testing device according to claim 2, characterized by The pushing assembly comprises a gear (41) and a slide rail (42), the gear (41) is fixedly sleeved on one of the rotating shafts (21), the slide rail (42) is fixed on the side of the test bench (1), a sliding seat is slidably arranged on the slide rail (42), a sliding plate (43) is fixed on the side of the sliding seat, a guide groove (431) is formed on the side of the sliding plate (43), a push rod (44) is fixed on the side of the sliding plate (43), a vertical rod (45) is fixed on the push rod (44), a rack (46) is fixed on the end of the vertical rod (45) away from the push rod (44), and the rack (46) is arranged opposite to the gear (41).

4. The motorcycle exhaust catalyst testing device according to claim 3, characterized by The guide groove (431) is composed of two inclined sections and a horizontal section, the two inclined sections are respectively located at the two ends of the horizontal section, the two inclined sections are both arranged in an inclined manner, the inclined directions of the two inclined sections are opposite, and one of the inclined sections is arranged opposite to the protruding block (331) in the initial state.

5. The motorcycle exhaust catalyst testing device according to claim 3, characterized by During the meshing of the gear (41) and the rack (46), the rack (46) drives the gear (41) to rotate by 180°.

6. The motorcycle exhaust catalyst testing device according to claim 5, characterized by The gas storage structure comprises a gas cylinder (71), the gas cylinder (71) is fixed on the side of the test bench (1), a sliding plate (72) is slidably connected in the gas cylinder (71), the sliding plate (72) and the inner surface of the gas cylinder (71) are connected through a third spring (73), the gas cylinder (71) is connected with one of the mounting pipes (65) away from the sealing cylinder (75), and the gas cylinder (71) is connected with a connecting pipe (74).

7. The motorcycle exhaust catalyst testing device according to claim 6, characterized by The control structure comprises a sealing cylinder (75), the sealing cylinder (75) is fixed on the end of the connecting pipe (74) away from the gas cylinder (71) and is connected with the connecting pipe (74), the sealing cylinder (75) is connected with an exhaust pipe (76), the end of the exhaust pipe (76) away from the sealing cylinder (75) is connected with a jet pipe (77), a movable block (751) is slidably arranged in the sealing cylinder (75), the movable block (751) and the inner surface of the sealing cylinder (75) are connected through a fourth spring (752), a top rod (753) is fixed on the top end of the movable block (751), the end of the top rod (753) away from the movable block (751) extends to the outside of the sealing cylinder (75), and the top rod (753) is arranged opposite to the fixed plate (211).

8. The motorcycle exhaust catalyst testing device according to claim 7, characterized by The outer surface of the movable block (751) is attached to the inner surface of the sealing cylinder (75).

9. The motorcycle exhaust catalyst testing device according to claim 1, characterized by The flow limiting directions of the two one-way valves (66) are opposite.

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