Test environment chamber for vehicle-mounted emission test
By introducing buffer and support components into the test environment chamber, the impact of vehicle vibration on the emissions testing device was resolved, ensuring the accuracy of the test and the stability of the sensors, and avoiding damage caused by vibration.
Patent Information
- Application Number
- CN202423303726.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Vibration during vehicle operation can cause vibration in the test environment chamber, affecting the normal operation and accuracy of the emissions testing equipment, and may even damage internal sensors.
A test environment chamber was designed, which includes a buffer component and a support component. The buffer component reduces the vibration amplitude through damping dampers and tension springs, while the support component limits the movement trajectory of the slider through a rotating shaft and rollers to improve stability.
It effectively reduces vibration in the environmental chamber, prevents interference with emission testing equipment, ensures test accuracy and sensor stability, and avoids damage.
Smart Images
Figure CN223499174U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of vehicle emission testing technology, and relates to a test environment chamber for vehicle emission testing. Background Technology
[0002] On-board emissions testing measures the concentration of pollutants in vehicle exhaust using an emissions analyzer in a portable emissions measurement system. It typically employs a direct sampling method, continuously collecting and sampling a portion of the exhaust gas, and combining this with flow rate and velocity information. The on-board exhaust testing device then performs the tests and analyses to obtain the vehicle's real-time emissions information.
[0003] When conducting emissions tests on excavators, specialized testing equipment is typically installed at the rear of the excavator to accurately capture exhaust emission data. However, changes in ambient temperature and humidity during the testing process often adversely affect the measurement accuracy of the testing equipment. To overcome this challenge, an additional testing environment chamber is usually configured. The main function of this chamber is to create a relatively constant environmental condition for the testing equipment, effectively isolating the test from external temperature and humidity changes, thereby ensuring the accuracy and reliability of the test data.
[0004] During vehicle operation, the vehicle itself will vibrate to a certain extent due to factors such as the operation of the power system and uneven road surface. This vibration often causes the test environment chamber to vibrate as well, which in turn has a direct or indirect impact on the emission testing device. Specifically, if the vibration force is too large, the emission testing device is prone to vibration in this environment. This will not only interfere with its normal working state, but also affect the accuracy of the test. More seriously, long-term vibration may cause the internal sensors of the testing device to shift or be damaged, thus causing measurement errors. Utility Model Content
[0005] The technical problem this utility model aims to solve is that during vehicle operation, due to factors such as the operation of the power system and uneven road surfaces, the vehicle itself will generate a certain degree of vibration. This vibration often causes the test environment chamber to vibrate as well, which in turn has a direct or indirect impact on the emission testing device. Specifically, if the vibration force is too large, the emission testing device is prone to vibration in this environment. This not only interferes with its normal working state, but also easily affects the accuracy of the test. More seriously, long-term vibration may cause the internal sensors of the testing device to shift or be damaged, thereby causing measurement errors.
[0006] The present invention discloses a test environment chamber for vehicle emission testing, comprising legs, a base plate fixedly connected to the middle of the legs, a top plate fixedly connected to the top of the legs, a test environment chamber body installed on the top of the top plate, an exhaust pipe installed on one side of the test environment chamber body, rubber blocks connected to the bottom of each leg, and buffer components provided on both sides of the base plate.
[0007] The buffer assembly includes a first baffle, a damping shock absorber, a connecting plate, a tension spring, a slider, a plug shaft, a support rod, a horizontal shaft, a second baffle, and a connecting shaft. The first baffle is fixed to the four corners of the top of the base plate. A damping shock absorber is fixed to each side of the first baffle that is close to each other. A connecting plate is fixed to one end of each damping shock absorber. A tension spring is connected to one side of the connecting plate, and the other end of the tension spring is connected to the middle of the damping shock absorber. A slider is fixed to each side of the connecting plate that is close to each other. A plug shaft is fixed to the middle of each slider. A support rod is rotatably connected to both ends of the plug shaft. A horizontal shaft is movably connected to the top of each support rod. A second baffle is fixed to both ends of the horizontal shaft. The top of the second baffle is fixed to the bottom of the top plate. A connecting shaft is fixed to the end of each damping shock absorber that is close to each other. The slider and the connecting plate are slidably connected to the middle of the connecting shaft. Support assemblies are provided on both sides of the slider.
[0008] The support assembly includes a rotating shaft, rollers, a limiting groove, and a guide rail. The rotating shaft is rotatably connected to the bottom of the slider, and rollers are fixed to both ends of the rotating shaft. A limiting groove is formed in the middle of the roller. The guide rail is fixed to the top of the base plate, and the limiting groove and the guide rail fit together.
[0009] An inspection door is hinged to one side of the environmental chamber body. Two hinges are installed and connected at the junction of the inspection door and the environmental chamber body. A handle is fixed to one side of the inspection door.
[0010] Each of the support rods has an L-shaped limiting rod fixed to one side of its top. The horizontal shaft has two sets of circular grooves in the middle, and the bottom of the L-shaped limiting rod fits into the circular grooves.
[0011] A synchronous shaft is fixed to one side of the support rods that are close to each other.
[0012] Compared with the prior art, the beneficial effects of this utility model are: by setting the buffer component, the amplitude of vibration at the environmental chamber body can be reduced, thereby preventing excessive vibration from interfering with the normal working state of the emission testing device. At the same time, it can also easily affect the accuracy of the test results, causing the test data to differ from the actual data, affecting the staff's judgment of vehicle information, and may also cause the sensors inside the testing device to be misaligned or damaged due to vibration.
[0013] By setting up support components, a certain amount of support force can be provided for the slider, thereby improving the stability and reliability of the slider. At the same time, it can also limit the movement trajectory of the slider and reduce the possibility of slight deviation in its movement position caused by unstable jitter. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0015] Figure 2 This is a cross-sectional structural diagram of the top plate of this utility model.
[0016] Figure 3 This is a schematic diagram of the structure of the buffer component of this utility model.
[0017] Figure 4 This is a cross-sectional structural diagram of the connecting shaft of this utility model.
[0018] Figure 5 This is a cross-sectional structural diagram of the support rod of this utility model.
[0019] Figure 6 This is a schematic diagram of the circular groove of this utility model.
[0020] In the diagram: 1. Support leg; 11. Base plate; 12. Top plate; 13. Environmental chamber body; 14. Exhaust pipe; 15. Rubber block; 16. First baffle; 17. Damping shock absorber; 18. Connecting plate; 19. Tension spring; 111. Slider; 112. Insert shaft; 113. Support rod; 114. Horizontal shaft; 115. Second baffle; 116. Connecting shaft; 2. Rotating shaft; 21. Roller; 22. Limiting groove; 23. Guide rail; 3. Inspection door; 31. Hinge; 32. Handle; 4. L-shaped limiting rod; 41. Circular groove; 5. Synchronous shaft. Detailed Implementation
[0021] Example 1
[0022] like Figures 1-6 As shown, the device includes a support leg 1, a base plate 11 fixed to the middle of the support leg 1, a top plate 12 fixed to the top of the support leg 1, an environmental chamber body 13 installed and connected to the top of the top plate 12, an exhaust pipe 14 installed on one side of the environmental chamber body 13, rubber blocks 15 connected to the bottom of each support leg 1, and buffer components provided on both sides of the base plate 11. The buffer components can reduce the shaking force of the environmental chamber body 13, thereby improving the stability of the internal testing device of the environmental chamber body 13.
[0023] The buffer assembly includes a first baffle 16, a damping shock absorber 17, a connecting plate 18, a tension spring 19, a slider 111, a shaft 112, a support rod 113, a horizontal shaft 114, a second baffle 115, and a connecting shaft 116. The first baffle 16 is fixed to the four corners of the top of the base plate 11. A damping shock absorber 17 is fixed to one side of each of the first baffles 16. A connecting plate 18 is fixed to one end of each damping shock absorber 17. A tension spring 19 is connected to one side of the connecting plate 18, and the other end of the tension spring 19 is connected to the middle of the damping shock absorber 17. A slider 111 is fixed to one side of each of the connecting plates 18. A shaft 112 is fixed to the middle of each slider 111. A support rod 113 is rotatably connected to both ends of the shaft 112. The top of each of the three components is movably connected to a horizontal shaft 114. A second baffle 115 is fixed to both ends of the horizontal shaft 114. The top of the second baffle 115 is fixed to the bottom of the top plate 12. A connecting shaft 116 is fixed to one end of each damping shock absorber 17 that is close to the other. A slider 111 and a connecting plate 18 are slidably connected to the middle of the connecting shaft 116. Support components are provided on both sides of the slider 111. During operation, the emission testing device is first installed inside the environmental chamber body 13. Then, the environmental chamber body 13 is installed behind the excavator cab, at the exhaust pipe location, and one end of the exhaust pipe 14 is connected to the exhaust pipe. When the vehicle starts, exhaust gas flows into the environmental chamber body 13 through the exhaust pipe 14, and the testing device can simultaneously test and detect the exhaust gas. When the vehicle vibrates due to its own vibration and the influence of the road surface, the environmental chamber body 13 will vibrate at the top plate 12. The top plate 12, under the pressure of the vibration, will vibrate downwards. At this time, the second baffle 115 and the horizontal shaft 114 will move downwards along with the top plate 12. As the horizontal shaft 114 moves downwards, the end position of the support rod 113 will rotate at the horizontal shaft 114, thus forcing the support rod 113 to change its tilt angle. Simultaneously, the bottom of the support rod 113 will drive the insert shaft 112 and the slider 111 to move outwards from the first baffle 16. The movement of the slider 111 will cause the connecting plate 18 to slide in the middle of the connecting shaft 116. Simultaneously, when the connecting plate 18 slides, it will press against the damping shock absorber 17 and the tension spring 19. The damping shock absorber 17 and the tension spring 19 are in an outward-opening state. At this time, the damping shock absorber 17 and the tension spring 19 are forced to compress under the pressure of the connecting plate 18. While compressing, they will buffer the vibration force transmitted by the top plate 12, thereby reducing the vibration amplitude of the environmental chamber body 13. This step, through the setting of the buffer component, can reduce the vibration amplitude of the environmental chamber body 13, thereby preventing excessive vibration from interfering with the normal working state of the emission testing device. It can also easily affect the accuracy of the test results, causing the test data to differ from the actual data, affecting the staff's judgment of vehicle information, and may also cause the sensors inside the testing device to be misaligned or damaged due to vibration.
[0024] L-shaped limiting rods 4 are fixed to one side of the top of the support rod 113. Two sets of circular grooves 41 are opened in the middle of the horizontal shaft 114. The bottom end of the L-shaped limiting rod 4 fits into the circular groove 41. When the support rod 113 rotates with the horizontal shaft 114, it will drive the L-shaped limiting rod 4 to move synchronously. At this time, the L-shaped limiting rod 4 will slide along the circular groove 41. This step, through the cooperation of the L-shaped limiting rod 4 and the circular groove 41, can limit the rotation trajectory of the support rod 113, thereby improving the stability of the position of the support rod 113 and reducing the occurrence of positional deviation due to lack of restraint.
[0025] A synchronous shaft 5 is fixed to one side of the support rods 113 that are close to each other. During operation, the synchronous shaft 5 can connect the two sets of support rods 113 to each other, and the movement of the support rods 113 will drive the synchronous shaft 5 to move synchronously. This step can synchronize the movement trajectory of the two sets of support rods 113 by opening the synchronous shaft 5, thereby improving the reliability and stability of the support rods 113 during movement.
[0026] Example 2
[0027] like Figures 1-5 As shown, the support assembly includes a rotating shaft 2, rollers 21, a limiting groove 22, and a guide rail 23. The rotating shaft 2 is rotatably connected to the bottom of the slider 111. Rollers 21 are fixed to both ends of the rotating shaft 2. A limiting groove 22 is formed in the middle of the roller 21. The guide rail 23 is fixed to the top of the base plate 11. The limiting groove 22 and the guide rail 23 fit together. During operation, when the slider 111 moves, it will drive the rotating shaft 2 and rollers 21 to move synchronously. The bottom of the limiting groove 22 is in contact with the surface of the base plate 11. Therefore, the rollers 21 will rub against the base plate 11 when they move. Under the action of friction, the rollers 21 and the rotating shaft 21 will move synchronously. As the slider 111 rolls, the rolling of the roller 21 causes the limiting groove 22 to rotate. When the limiting groove 22 rotates, it rolls along the surface of the guide rail 23. Through the cooperation of the limiting groove 22 and the guide rail 23, the rolling trajectory of the roller 21 can be limited. This step, through the setting of the support component, can provide a certain support force for the slider 111, thereby improving the stability and reliability of the slider 111. At the same time, it can also limit the movement trajectory of the slider 111, reducing the possibility of the slider 111 being prone to slight displacement of its movement position due to unstable jitter.
[0028] Example 3
[0029] like Figure 1As shown, an inspection door 3 is hinged to one side of the environmental chamber body 13. Two hinges 31 are installed and connected at the junction of the inspection door 3 and the environmental chamber body 13. A handle 32 is fixed to one side of the inspection door 3. During operation, when it is necessary to maintain and service the testing device inside the environmental chamber body 13, the inspection door 3 can be expanded outward by pulling the handle 32, thereby opening a gap. This step, through the setting of the inspection door 3, facilitates a series of maintenance work such as repair, maintenance, and cleaning of the testing device inside the environmental chamber body 13, thereby improving the convenience of maintenance work.
[0030] The usage process of the test environment chamber for vehicle emission testing provided by this utility model is as follows: During operation, the emission testing device is first installed inside the environment chamber body 13. Then, the environment chamber body 13 is installed behind the excavator cab, that is, at the exhaust pipe. One end of the exhaust pipe 14 is connected to the exhaust pipe. When the vehicle starts, the exhaust gas will flow into the environment chamber body 13 through the exhaust pipe 14. At the same time, the testing device can test and detect the exhaust gas. When the vehicle vibrates due to its own vibration and the influence of the road, the environment chamber body 13 will vibrate at the top plate 12 due to the vibration. The top plate 12 will vibrate downward due to the pressure of the vibration. At this time, the second baffle 115 and the horizontal shaft 114 will be pulled downward by the top plate 12. As the horizontal axis 114 moves downward, the support rod 113 is affected, causing its end position to rotate at the horizontal axis 114. This forces the support rod 113 to change its tilt angle. Simultaneously, the bottom of the support rod 113 drives the insert shaft 112 and the slider 111 to move outward from the first baffle 16. The movement of the slider 111 causes the connecting plate 18 to slide in the middle of the connecting shaft 116. At the same time, when the connecting plate 18 slides, it will press against the damping damper 17 and the tension spring 19, and the damping damper 17 and the tension spring 19 will be in an outward-opening state. At this time, the damping damper 17 and the tension spring 19 will be forced to compress under the pressure of the connecting plate 18. During the compression, the vibration force transmitted by the top plate 12 will be buffered, thereby mitigating the impact on the environmental cabin body 13. The purpose of this step, through the setting of the buffer component, is to reduce the amplitude of vibration at the environmental chamber body 13, thereby preventing excessive vibration from interfering with the normal operation of the emission testing device. Excessive vibration can also affect the accuracy of test results, leading to discrepancies between the measured data and actual values, impacting the operator's judgment of vehicle information, and potentially causing misalignment or damage to the sensors inside the testing device. During operation, when the slider 111 moves, it drives the rotating shaft 2 and roller 21 to move synchronously. The bottom of the limiting groove 22 contacts the surface of the base plate 11, so the roller 21 rubs against the base plate 11 during movement. Under the action of friction, the roller 21 and the rotating shaft 2 roll relative to the slider 111. The rolling of roller 21 causes the limiting groove 22 to rotate, and the limiting groove 22 rolls along the surface of guide rail 23 during rotation. The cooperation between the limiting groove 22 and guide rail 23 restricts the rolling trajectory of roller 21. This step, through the support component, provides support for slider 111, thereby improving its stability and reliability. It also limits the movement trajectory of slider 111, reducing the likelihood of slight displacement due to jitter or unstable dynamics. During operation, when maintenance and upkeep of the testing equipment inside the environmental chamber 13 are required, the access door 3 can be expanded outwards by pulling handle 32, creating an opening.This step, through the installation of the inspection door 3, facilitates maintenance, upkeep, and cleaning of the testing devices inside the environmental chamber 13, thereby improving the convenience of maintenance work. During operation, when the support rod 113 rotates relative to the horizontal axis 114, it drives the L-shaped limit rod 4 to move synchronously. The L-shaped limit rod 4 slides along the circular groove 41. This step, through the cooperation of the L-shaped limit rod 4 and the circular groove 41, restricts the rotation trajectory of the support rod 113, thereby improving the stability of the support rod 113's position and reducing the possibility of positional deviation due to lack of restraint. During operation, the synchronous shaft 5 connects the two sets of support rods 113, and the movement of the support rods 113 drives the synchronous shaft 5 to move synchronously. This step, through the opening of the synchronous shaft 5, synchronizes the movement trajectories of the two sets of support rods 113, thereby improving the reliability and stability of the support rods 113's movement.
[0031] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.
Claims
1. A test environment chamber for on-board emissions testing, characterized in that: It includes outriggers (1), a base plate (11) is fixedly connected to the middle of the outriggers (1), a top plate (12) is fixedly connected to the top of the outriggers (1), an environmental chamber body (13) is installed and connected to the top of the top plate (12), an exhaust pipe (14) is installed on one side of the environmental chamber body (13), rubber blocks (15) are connected to the bottom of each outrigger (1), and buffer components are provided on both sides of the base plate (11).
2. The test environment chamber for vehicle emission testing according to claim 1, characterized in that: The buffer assembly includes a first baffle (16), a damping damper (17), a connecting plate (18), a tension spring (19), a slider (111), a shaft (112), a support rod (113), a horizontal shaft (114), a second baffle (115), and a connecting shaft (116). The first baffle (16) is fixed to the top four corners of the base plate (11). A damping damper (17) is fixed to each side of the first baffle (16) that is close to each other. A connecting plate (18) is fixed to one end of each damping damper (17). A tension spring (19) is connected to one side of the connecting plate (18). The other end of the tension spring (19) is connected to the middle of the damping damper (17). A slider (111) is fixedly connected to one side of the connecting plate (18) that is close to each other. A plug shaft (112) is fixedly connected to the middle of the slider (111). A support rod (113) is rotatably connected to both ends of the plug shaft (112). A horizontal shaft (114) is movably connected to the top of the support rod (113). A second baffle (115) is fixedly connected to both ends of the horizontal shaft (114). The top of the second baffle (115) is fixedly connected to the bottom of the top plate (12). A connecting shaft (116) is fixedly connected to one end of the damping shock absorber (17) that is close to each other. The slider (111) and the connecting plate (18) are slidably connected to the middle of the connecting shaft (116). Support components are provided on both sides of the slider (111).
3. A test environment chamber for vehicle-mounted emission testing according to claim 2, characterized in that: The support assembly includes a rotating shaft (2), rollers (21), a limiting groove (22), and a guide rail (23). The rotating shaft (2) is rotatably connected to the bottom of the slider (111). Rollers (21) are fixed to both ends of the rotating shaft (2). A limiting groove (22) is opened in the middle of the roller (21). The guide rail (23) is fixed to the top of the base plate (11). The limiting groove (22) and the guide rail (23) fit together.
4. The test environment chamber for vehicle emission testing according to claim 1, characterized in that: An inspection door (3) is hinged to one side of the environmental chamber body (13). Two hinges (31) are installed and connected at the junction of the inspection door (3) and the environmental chamber body (13). A handle (32) is fixed to one side of the inspection door (3).
5. A test environment chamber for vehicle-mounted emission testing according to claim 2, characterized in that: The support rod (113) is fixed with an L-shaped limiting rod (4) on one side of its top. The horizontal shaft (114) has two sets of circular grooves (41) in the middle. The bottom end of the L-shaped limiting rod (4) fits into the circular groove (41).
6. A test environment chamber for vehicle-mounted emission testing according to claim 2, characterized in that: The support rods (113) are fixed to a synchronous shaft (5) on the side that is close to each other.