A fixed auxiliary structure of linear velocity sampling wheel for chassis dynamometer calibration

Abstract

This utility model discloses a fixing auxiliary structure for a linear velocity sampling wheel used in chassis dynamometer calibration. The fixing auxiliary structure includes an adjustable bracket and a clamping connection mechanism. The clamping connection mechanism is mounted on the adjustable bracket. The adjustable bracket includes a guide rod, an adjustable angle adjustment mechanism, a height adjustment mechanism, and a connecting plate. The height adjustment mechanism is sleeved on the guide rod. One side of the connecting plate is fixed to one side of the height adjustment mechanism, and one end of the height adjustment mechanism is fixed to the other side of the connecting plate. A transverse fixing rod is fixed on the angle adjustment mechanism. The clamping connection mechanism is mounted on the transverse fixing rod to achieve the installation and fixing of the clamping connection mechanism and the adjustable bracket. The transverse fixing rod is fixed to the height adjustment mechanism through the angle adjustment mechanism and the connecting plate. This utility model allows for adjustment of the height and angle of the linear velocity sampling wheel through the adjustable bracket, improving the flexibility and practicality of fixing the linear velocity sampling wheel.

Description

Technical Field

[0001] This utility model relates to the field of calibration and measurement technology for automotive chassis dynamometers, specifically to a fixed auxiliary structure for a linear velocity sampling wheel used in the calibration of an automotive chassis dynamometer. Background Technology

[0002] An automotive chassis dynamometer is an indoor bench test device used to test a vehicle's performance, including power, emissions under various operating conditions, and fuel efficiency. The dynamometer uses rollers to simulate a road surface, calculates road simulation equations, and uses a loading device to simulate different operating conditions of the vehicle. The rollers are a core component of the dynamometer, and their rotational speed is its most important technical indicator, requiring annual calibration. The roller speed calibration primarily utilizes a linear velocity sampling wheel, an encoder, and a display terminal. The linear velocity sampling wheel is connected to the encoder via a coupling, and the encoder transmits signals... The line is connected to the display terminal. The linear velocity sampling wheel directly contacts (or is very close to) the roller surface of the chassis dynamometer. When the roller rotates, the friction force drives the linear velocity sampling wheel to rotate at the same linear velocity. The linear velocity sampling wheel measures the true linear velocity of the roller surface relative to the linear velocity sampling wheel. The encoder converts the rotational motion of the linear velocity sampling wheel into a precise digital electrical signal (pulse sequence), which is output to the display terminal through the signal transmission line. The display terminal, acting as a data processor and display, receives the pulse signal from the encoder, performs calculations, and displays the final speed value to the operator in real time to calibrate the speed accuracy of the automotive chassis dynamometer.

[0003] Traditional linear velocity sampling wheels, when measuring the true linear velocity on the surface of a dynamometer drum, primarily involve a tester holding the sampling wheel and bringing it directly into contact (or very close to) the drum surface of the chassis dynamometer. Existing linear velocity sampling wheels have the following problems during measurement:

[0004] 1) When using the handheld linear velocity sampling wheel for measurement, the tester needs to squat or bend over and be very close to the high-speed rotating roller. The roller on the chassis dynamometer usually rotates at high speed, which can easily cause safety accidents due to the tester getting too close to the roller of the chassis dynamometer. This poses a significant safety hazard and a great threat to the life and health of the tester.

[0005] 2) When using a handheld linear velocity sampling wheel for measurement, the required labor cost and the level of manual labor involved are high.

[0006] 3) When using a handheld linear velocity sampling wheel for measurement, if the tester makes a mistake such as hand tremor, it may affect the accuracy of the measurement. Utility Model Content

[0007] The technical problem this utility model aims to solve is to address the shortcomings of existing technologies by providing a fixing auxiliary structure that can fix a linear velocity sampling wheel, adjust the height and angle of the fixing of the linear velocity sampling wheel, improve the flexibility and practicality of fixing the linear velocity sampling wheel, eliminate the need for test personnel to approach the high-speed rotating roller on the chassis dynamometer to fix the linear velocity sampling wheel, avoid safety accidents caused by test personnel being too close to the roller of the chassis dynamometer from the source, and also avoid measurement errors caused by test personnel shaking during manual measurement.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A fixing auxiliary structure for a linear velocity sampling wheel used in chassis dynamometer calibration is disclosed. The fixing auxiliary structure includes an adjustable bracket and a clamping and connecting mechanism for fixing the linear velocity sampling wheel. The clamping and connecting mechanism is mounted on the adjustable bracket. The adjustable bracket includes a guide rod, an adjustable angle adjustment mechanism, a height adjustment mechanism, and a connecting plate. The height adjustment mechanism is sleeved on the guide rod so that the height adjustment mechanism can move axially along the guide rod. One side of the connecting plate is fixed to one side of the height adjustment mechanism, and one end of the height adjustment mechanism is fixed to the other side of the connecting plate. A transverse fixing rod is fixed on the angle adjustment mechanism. The clamping and connecting mechanism is mounted on the transverse fixing rod. The transverse fixing rod is fixed to the height adjustment mechanism through the angle adjustment mechanism and the connecting plate.

[0010] Furthermore, the height adjustment mechanism includes a guide block and an adjusting bolt. The guide block has a guide hole through its body at its center. The guide block is sleeved on the guide rod through the guide hole so that the guide block can slide along the axial direction of the guide rod. The guide block has a threaded hole on its side, which intersects with the guide hole. The guide block is threadedly connected to the adjusting bolt through the threaded hole. The end of the adjusting bolt can extend into the guide hole and press or disengage from the surface of the guide rod.

[0011] Furthermore, the angle adjustment mechanism includes a rotating disk, a rotating shaft, and an adjustment handle. One end face of the rotating disk is fixed to one side of the connecting plate, one end of the rotating shaft is fixed to the other end face of the rotating disk, and the other end of the rotating shaft is connected to the adjustment handle. The rotating disk has a through hole that penetrates its body, and the transverse fixing rod passes through the through hole of the rotating disk and is fixed on the rotating disk.

[0012] Furthermore, the clamping connection mechanism includes a clamping component and a connecting component. One end of the connecting component is connected to the linear velocity sampling wheel, the lower end of the clamping component is fixed to the other end of the connecting component, and the upper end of the clamping component is fixed to the transverse fixing rod.

[0013] Furthermore, the connecting assembly includes a connecting plate and a fixed shaft. One end of the connecting plate is connected to the linear velocity sampling wheel, the other end of the connecting plate is fixed to one end of the fixed shaft, the other end of the fixed shaft is fixed to the lower end of the clamping assembly, and the upper end of the clamping assembly is fixed to the transverse fixing rod.

[0014] Further, the clamping assembly includes a fixed clamp, a first adjustable handle screw, and a second adjustable handle screw. The fixed clamp is formed in a cuboid shape, with a first clamping through hole formed along the length direction of the fixed clamp. A first notch is formed on the edge of the first clamping through hole of the fixed clamp. Each side of the first notch of the fixed clamp has a first threaded hole that is opposite to each other for the first adjustable handle screw to pass through. A second clamping through hole is formed along the width direction of the fixed clamp, with a second notch formed on the edge of the second clamping through hole. Each side of the second notch of the fixed clamp has a second threaded hole that is opposite to each other for the second adjustable handle screw to pass through. The fixing shaft of the connecting assembly passes through the first clamping through hole on the fixed clamp and is locked and fixed by the first adjustable handle screw passing through the first threaded holes on both sides of the first notch of the fixed clamp. The transverse fixing rod passes through the second clamping through hole on the fixed clamp and is locked and fixed by the second adjustable handle screw passing through the second threaded holes on both sides of the second notch of the fixed clamp.

[0015] Furthermore, the adjustable bracket includes a base located at the bottom of the guide rod and fixed to the guide rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1) The fixed auxiliary structure of this utility model includes an adjustable bracket and a clamping connection mechanism. The clamping connection mechanism is installed on the adjustable bracket. The adjustable bracket includes a guide rod, an adjustable angle adjustment mechanism, a height adjustment mechanism, and a connecting plate. The height adjustment mechanism is sleeved on the guide rod so that the height adjustment mechanism can move along the axial direction of the guide rod. One side of the connecting plate is fixed to one side of the height adjustment mechanism, and one end of the height adjustment mechanism is fixed to the other side of the connecting plate. A transverse fixing rod is fixed on the angle adjustment mechanism. The clamping connection mechanism is installed on the transverse fixing rod to realize the installation and fixation of the clamping connection mechanism and the adjustable bracket. The transverse fixing rod is fixed to the height adjustment mechanism through the angle adjustment mechanism and the connecting plate. This invention uses an adjustable bracket to fix the linear velocity sampling wheel, eliminating the need for test personnel to approach the high-speed rotating rollers on the chassis dynamometer to fix the wheel. This avoids safety accidents caused by test personnel being too close to the rollers and also prevents measurement errors caused by vibration during manual measurement. The adjustable bracket also allows for adjustment of the height and angle at which the linear velocity sampling wheel is fixed, improving the flexibility and practicality of fixing the wheel.

[0018] 2) The adjustable bracket of this utility model includes a base, which is located at the bottom of the guide rod and fixed to the guide rod. The base can be an electromagnetic base. Using an electromagnetic base as the base of the adjustable bracket allows the adjustable bracket to be easily attached to the platform of the chassis dynamometer, improving the stability of the adjustable bracket placed on the platform of the chassis dynamometer. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing the usage state of the fixed auxiliary structure of this utility model, after fixing the linear velocity sampling wheel and placing it on the chassis dynamometer platform.

[0020] Figure 2 This is a schematic diagram illustrating the state in which the fixed auxiliary structure of this utility model fixes the linear velocity sampling wheel. Figure 1 ;

[0021] Figure 3 This is a schematic diagram illustrating the state in which the fixed auxiliary structure of this utility model fixes the linear velocity sampling wheel. Figure 2 ;

[0022] Figure 4 This is a schematic diagram showing the relationship between the adjustable bracket, clamping mechanism, and linear velocity sampling wheel of this utility model;

[0023] Figure 5 This is a schematic diagram showing the relationship between the clamping mechanism and the linear velocity sampling wheel of this utility model;

[0024] Figure 6 This is a schematic diagram of the height adjustment mechanism of this utility model;

[0025] Figure 7 This is a schematic diagram of the angle adjustment mechanism of this utility model;

[0026] Figure 8 This is a schematic diagram of the clamping assembly of this utility model;

[0027] Figure 9 This is a structural schematic diagram of the clamping component of this utility model from another angle.

[0028] In the figure, there are: adjustable bracket 1, guide rod 11, height adjustment mechanism 12, guide block 121, adjusting bolt 122, guide hole 123, angle adjustment mechanism 13, rotating disk 131, rotating shaft 132, adjusting handle 133, through hole 134, connecting plate 14, horizontal fixing rod 15, base 16, clamping connection mechanism 2, clamping assembly 21, fixing clamp 211, first clamping through hole 2111, first notch groove 2112, second clamping through hole 2113, second notch groove 2114, first adjustable handle screw 212, second adjustable handle screw 213, connecting assembly 22, connecting plate 221, fixed shaft 222, linear velocity sampling wheel 3, encoder 4, signal transmission line 5, display terminal 6, chassis dynamometer 7, roller 71, and table 72. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figures 1-7As shown, Embodiment 1 of this utility model provides a fixing auxiliary structure for a linear velocity sampling wheel 3 used for chassis dynamometer calibration. The fixing auxiliary structure includes an adjustable bracket 1 and a clamping and connecting mechanism 2 for fixing the linear velocity sampling wheel 3. The clamping and connecting mechanism 2 is installed on the adjustable bracket 1. The adjustable bracket 1 includes a guide rod 11, an adjustable angle adjustment mechanism 13, a height adjustment mechanism 12, and a connecting plate 14. The height adjustment mechanism 12 is sleeved on the guide rod 11 so that the height adjustment mechanism 12 can move axially along the guide rod 11. One side of the connecting plate 14 is fixed to one side of the height adjustment mechanism 12, and one end of the height adjustment mechanism 12 is fixed to the other side of the connecting plate 14. A transverse fixing rod 15 is fixed on the angle adjustment mechanism 12. The clamping and connecting mechanism 2 is installed on the transverse fixing rod 15 to realize the installation and fixing of the clamping and connecting mechanism 2 and the adjustable bracket 1. The transverse fixing rod 15 is fixed to the height adjustment mechanism 12 through the angle adjustment mechanism 12 and the connecting plate 14. The horizontal fixed rod 15 of this utility model is connected to the height adjustment mechanism 12 through the angle adjustment mechanism 12 and the connecting plate 14. The height adjustment mechanism 12 can move up and down along the axial direction of the guide rod 11, so that the connecting plate 14 and the angle adjustment mechanism 12 on the height adjustment mechanism 12 move up and down accordingly. During the up and down movement of the angle adjustment mechanism 12, it will drive the horizontal fixed rod 15 and the clamping connection mechanism 2 on it to move up and down, thereby realizing the height adjustment of the linear velocity sampling wheel 3 fixed on the clamping connection mechanism 2. By rotating the angle adjustment mechanism 13, the horizontal fixed rod 15 fixed to the angle adjustment mechanism 13 can be driven to rotate, so that the clamping connection mechanism 2 and the linear velocity sampling wheel 3 on the horizontal fixed rod 15 rotate accordingly, thereby realizing the angle adjustment of the linear velocity sampling wheel 3.

[0031] The adjustable bracket 1 of this utility model includes a base 16, which is located at the bottom of the guide rod 11 and fixed to the guide rod 11. In specific implementation, the base 16 of this utility model can be an electromagnetic base 16. When the linear velocity sampling wheel 3 needs to measure and calibrate the rotational speed of the roller 71 of the chassis dynamometer 7, the adjustable bracket 1 can be easily attached to the platform 72 of the chassis dynamometer 7 through the base 16, thereby improving the stability of the adjustable bracket 1 placed on the platform 72 of the chassis dynamometer 7.

[0032] In this embodiment of the invention, the height adjustment mechanism 12 includes a guide block 121 and an adjusting bolt 122. The guide block 121 has a guide hole 123 extending through its body at its center. The guide block 121 is fitted onto the guide rod 11 through the guide hole 123 so that the guide block 121 can slide axially along the guide rod 11. The side of the guide block 121 has a threaded hole intersecting the guide hole 123. The guide block 121 is threadedly connected to the adjusting bolt 122 through the threaded hole. The end of the adjusting bolt 122 can extend into the guide hole 123 and press against or disengage from the surface of the guide rod 11. Specifically, the adjusting bolt 122 is a wing bolt. When the adjusting bolt 122 is tightened, the end of the adjusting bolt 122 presses against the surface of the guide rod 11 to fix the guide block 121; when the adjusting bolt 122 is loosened, its end disengages or reduces the pressure on the surface of the guide rod 11, allowing the guide block 121 to slide axially along the guide rod 11.

[0033] The angle adjustment mechanism 13 of this utility model includes a rotating disk 131, a rotating shaft 132, and an adjustment handle 133. One end face of the rotating disk 131 is fixed to one side of the connecting plate 14, one end of the rotating shaft 132 is fixed to the other end face of the rotating disk 131, and the other end of the rotating shaft 132 is connected to the adjustment handle 133. The rotating disk 131 has a through hole that passes through its body, and the transverse fixing rod 15 passes through the through hole of the rotating disk 131 and is fixed to the rotating disk 131. When the angle adjustment mechanism 13 needs to rotate the transverse fixing rod 15 and the clamping connection mechanism 2 on it, the adjustment handle 133 can be rotated to drive the rotating shaft 132 to rotate. The rotating shaft 132 will drive the rotating disk 131 and the transverse fixing rod 15 fixed on the rotating disk 131 to rotate, thereby realizing the rotation of the transverse fixing rod 15 and the clamping connection mechanism 2 on the transverse fixing rod 15, and realizing the adjustment of the angle of the clamping connection mechanism 2 and the linear velocity sampling wheel 3.

[0034] like Figures 8-9As shown, in a specific implementation of this utility model embodiment, the clamping and connecting mechanism 2 includes a clamping component 21 and a connecting component 22. One end of the connecting component 22 is connected to the linear velocity sampling wheel 3. The lower end of the clamping component 21 is fixed to the other end of the connecting component 22 to fix the linear velocity sampling wheel 3. The upper end of the clamping component 21 is fixed to the transverse fixing rod 15 to fix the clamping and connecting mechanism 2 to the transverse fixing rod 15. The connecting component 22 includes a connecting plate 221 and a fixing shaft 222. One end of the connecting plate 221 is connected to the linear velocity sampling wheel 3. The other end of the connecting plate 221 is fixed to one end of the fixing shaft 222. The other end of the fixing shaft 222 is fixed to the lower end of the clamping component 21. The upper end of the clamping component 21 is fixed to the transverse fixing rod 15. The linear velocity sampling wheel 3 can also be connected to the encoder 4 through a coupling. The encoder 4 is connected to the display terminal 6 through a signal transmission line 5.The clamping assembly 21 includes a fixed clamp 211, a first adjustable handle screw 212, and a second adjustable handle screw 213. The fixed clamp 211 is formed in a cuboid shape, and a first clamping through hole 2111 is formed along the length direction of the fixed clamp 211. A first notch 2112 is formed on the edge of the first clamping through hole 2111 of the fixed clamp 211. Each side of the first notch 2112 of the fixed clamp 211 has a first threaded hole that is opposite to each other, through which the first adjustable handle screw 212 passes. A second clamping through hole 2113 is formed through the fixing clamp 211. A second notch 2114 is formed on the edge of the second clamping through hole 2113. Each side of the second notch 2114 of the fixing clamp 211 has a second threaded hole that is opposite to each other, through which the second adjustable handle screw 213 passes. The fixing shaft 222 of the connecting assembly 22 passes through the first clamping through hole 2111 on the fixing clamp 211 and then passes through the first threaded holes on both sides of the first notch 2112 of the fixing clamp 211 via the first adjustable handle screw 212. By rotating the first adjustable handle screw... The handle on the wire 212 causes the screw of the first adjustable handle screw 212 to apply torque to both sides of the first notch 2112 to adjust the size of the first notch 2112, thereby tightening one end of the fixed shaft 222 onto the first clamping through hole 2111 of the fixed clamp 211, so that the fixed clamp 211 clamps and fixes the fixed shaft 222 of the connecting assembly 22, thereby fixing the connecting assembly 22 and the linear velocity sampling wheel 3 by the clamping assembly 21; the transverse fixing rod 15 passes through the second clamping through hole 2113 on the fixed clamp 211 and then through the first The second adjustable handle screw 213 passes through the second threaded holes on both sides of the second cut groove 2114 of the fixing clamp 211. By rotating the handle on the second adjustable handle screw 213, the screw of the second adjustable handle screw 213 applies torque to both sides of the second cut groove 2114 to adjust the size of the second cut groove 2114, thereby tightening and fixing the transverse fixing rod 15 to the second clamping through hole 2113 of the fixing clamp 211, realizing the clamping and fixing of the fixing clamp 211 and the transverse fixing rod 15, and thus fixing the upper end of the clamping assembly 21 to the transverse fixing rod 15.

[0035] Compared with the prior art, the technical solution disclosed in the above embodiments has the following beneficial effects:

[0036] In the above embodiments, the fixed auxiliary structure provided by this utility model can fix the linear velocity sampling wheel 3, eliminating the need for test personnel to hold the linear velocity sampling wheel 3 close to the high-speed rotating roller 72 on the chassis dynamometer 7. This avoids safety accidents caused by test personnel approaching the roller 72 of the chassis dynamometer 7 from the source. It can also avoid measurement errors caused by test personnel shaking during manual measurement, reducing manual labor input and labor costs. Furthermore, the height and angle at which the linear velocity sampling wheel 3 is fixed can be adjusted, improving the flexibility and practicality of fixing the linear velocity sampling wheel 3. This makes it easy to adjust the linear velocity sampling wheel 3 to the working state of the roller 72 on the chassis dynamometer 7, thus expanding the application range of the fixed auxiliary structure.

[0037] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A fixed auxiliary structure for a linear velocity sampling wheel used in chassis dynamometer calibration, characterized in that: The fixed auxiliary structure includes an adjustable bracket and a clamping connection mechanism for fixing the linear velocity sampling wheel. The clamping connection mechanism is mounted on the adjustable bracket. The adjustable bracket includes a guide rod, an adjustable angle adjustment mechanism, a height adjustment mechanism, and a connecting plate. The height adjustment mechanism is sleeved on the guide rod so that the height adjustment mechanism can move along the axial direction of the guide rod. One side of the connecting plate is fixed to one side of the height adjustment mechanism, and one end of the height adjustment mechanism is fixed to the other side of the connecting plate. A transverse fixing rod is fixed on the angle adjustment mechanism. The clamping connection mechanism is mounted on the transverse fixing rod. The transverse fixing rod is fixed to the height adjustment mechanism through the angle adjustment mechanism and the connecting plate.

2. The fixed auxiliary structure for the linear velocity sampling wheel used in chassis dynamometer calibration according to claim 1, characterized in that: The height adjustment mechanism includes a guide block and an adjusting bolt. The guide block has a guide hole through its body at its center. The guide block is sleeved on the guide rod through the guide hole so that the guide block can slide along the axial direction of the guide rod. The guide block has a threaded hole on its side, which intersects with the guide hole. The guide block is threadedly connected to the adjusting bolt through the threaded hole. The end of the adjusting bolt can extend into the guide hole and press or disengage from the surface of the guide rod.

3. The fixed auxiliary structure for the linear velocity sampling wheel used in chassis dynamometer calibration according to claim 1, characterized in that: The angle adjustment mechanism includes a rotating disk, a rotating shaft, and an adjustment handle. One end face of the rotating disk is fixed to one side of the connecting plate, one end of the rotating shaft is fixed to the other end face of the rotating disk, and the other end of the rotating shaft is connected to the adjustment handle. The rotating disk has a through hole that passes through its body, and the transverse fixing rod passes through the through hole of the rotating disk and is fixed on the rotating disk.

4. The fixed auxiliary structure for the linear velocity sampling wheel used in chassis dynamometer calibration according to claim 1, characterized in that: The clamping and connecting mechanism includes a clamping component and a connecting component. One end of the connecting component is connected to the linear velocity sampling wheel, the lower end of the clamping component is fixed to the other end of the connecting component, and the upper end of the clamping component is fixed to the transverse fixing rod.

5. The fixed auxiliary structure for the linear velocity sampling wheel used in chassis dynamometer calibration according to claim 4, characterized in that: The connecting assembly includes a connecting plate and a fixed shaft. One end of the connecting plate is connected to the linear velocity sampling wheel, and the other end of the connecting plate is fixed to one end of the fixed shaft. The other end of the fixed shaft is fixed to the lower end of the clamping assembly, and the upper end of the clamping assembly is fixed to the transverse fixing rod.

6. The fixed auxiliary structure for the linear velocity sampling wheel used in chassis dynamometer calibration according to claim 4, characterized in that: The clamping assembly includes a fixed clamp, a first adjustable handle screw, and a second adjustable handle screw. The fixed clamp is rectangular in shape and has a first clamping through hole along its length. A first notch is formed on the edge of the first clamping through hole. Each side of the first notch has a first threaded hole for the first adjustable handle screw to pass through and is opposite to each other. A second clamping through hole is formed along the width of the fixed clamp and has a second notch on its edge. Each side of the second notch has a second threaded hole for the second adjustable handle screw to pass through and is opposite to each other. The fixing shaft of the connecting assembly passes through the first clamping through hole on the fixed clamp and is locked and fixed by the first adjustable handle screw passing through the first threaded holes on both sides of the first notch of the fixed clamp. The transverse fixing rod passes through the second clamping through hole on the fixed clamp and is locked and fixed by the second adjustable handle screw passing through the second threaded holes on both sides of the second notch of the fixed clamp.

7. The fixed auxiliary structure for the linear velocity sampling wheel used in chassis dynamometer calibration according to claim 1, characterized in that: The adjustable bracket includes a base, which is located at the bottom of the guide rod and fixed to the guide rod.

Images