Transmission shaft strain gauge test calibration table

Abstract

The utility model discloses a transmission shaft strain gauge test calibration table, which comprises a support platform, a first installation assembly, a shaft to be tested, a second installation assembly and a force application assembly, and is characterized in that the first installation assembly and the second installation assembly are oppositely arranged on the support platform at intervals and are connected with two axial ends of the shaft to be tested; the force application assembly comprises a dowel bar, a force application part arranged in the middle of the dowel bar, a first force application structure arranged at the first end of the dowel bar and used for connecting weights of different weights, and a second force application structure arranged at the second end of the dowel bar and used for connecting weights of different weights. The second installation assembly is connected with the force transmission part and is used for transmitting torque to the to-be-tested shaft. Compared with the prior art, in the testing process, torque input only needs to change the total weight of the weights, the testing process is simple, the testing cost is low, the testing efficiency is high, practicability is high, and the method is suitable for wide application and popularization.

Description

TECHNICAL FIELD

[0001] The utility model relates to strain test technical field, in particular, relate to a kind of transmission shaft strain gauge test calibration platform. BACKGROUND

[0002] Whole vehicle transmission shaft is the power transmission element between vehicle power system and drive axle system, and the torque of transmission shaft is the key parameter of vehicle output power, by adopting strain gauge test technology, pasting torque strain gauge on transmission shaft surface, through the torque input of power system, transmission shaft surface will produce slight distortion, through the strain gauge deformation data feedback of transmission shaft surface, through dynamic data acquisition system, transmission shaft torque data of vehicle under acceleration, braking, uniform speed, coasting, uphill and downhill operating conditions can be collected, so that the power distribution of vehicle under each operating condition can be analyzed, and it has important guiding significance for vehicle parts design and optimization and power matching.

[0003] At present, the strain test of transmission shaft usually adopts transmission shaft static torque test bench, connects test circuit and signal acquisition system to transmission shaft with pasted strain gauge, transmission shaft is installed on test bench to load rated torque load to obtain load-strain relationship under different torque load, so that the torque calibration coefficient of the transmission shaft is obtained, and then the calibrated transmission shaft is installed on the vehicle for torque load spectrum test. But the above calibration method needs to configure standard static torque test bench, and uses electro-hydraulic system to load, and the test process is relatively complex, the test cost is high, the universality is poor, and the test efficiency is low.

[0004] And like Chinese utility model patent CN207964161U discloses a kind of transmission shaft strain gauge signal calibration support, bearing assembly can be moved on guide rail adjustment, compared with prior art only to calibrate one kind of whole vehicle transmission shaft, the utility model can be suitable for various different lengths of whole vehicle transmission shaft, and the scope of application is wider. But in the above scheme, standard torque is connected by calibration connector, and standard torque needs to be applied by torque sensor and calibration equipment together, the test process is relatively complex, and the test cost is high. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of transmission shaft strain gauge test calibration platform to solve the technical problems that the strain test of existing transmission shaft exists relatively complex test process, high test cost.

[0006] According to one aspect of the present invention, a transmission shaft strain gauge test and calibration platform is provided, comprising a support platform, a first mounting assembly, a shaft to be measured, a second mounting assembly and a force-applying assembly, wherein the first mounting assembly and the second mounting assembly are arranged relatively spaced apart on the support platform and are respectively connected to the axial ends of the shaft to be measured, the force-applying assembly comprises a force transmission rod, a force transmission portion centrally arranged on the force transmission rod, a first force-applying structure arranged on the first end of the force transmission rod for connecting weights of different weights, and a second force-applying structure arranged on the second end of the force transmission rod for connecting weights of different weights, the second mounting assembly is connected to the force transmission portion for transmitting torque to the shaft to be measured.

[0007] As a further improvement of the above technical solution:

[0008] Furthermore, an adjustment track is arranged on the supporting end portion of the supporting platform along the axial direction of the shaft to be measured, and the first mounting assembly is fixedly arranged on the adjustment track after being slidably adjusted.

[0009] Furthermore, the first mounting assembly includes a sliding mounting seat that can be slidably adjusted and then fixedly arranged on the adjustment rail, a connecting flange arranged on the upper end of the sliding mounting seat and detachably connected to the shaft to be measured, and a height adjustment member for being arranged at the bottom of the sliding mounting seat to adjust the height of the connecting flange.

[0010] Furthermore, the adjustment rail is provided with a plurality of fixing holes arranged at intervals along the sliding direction for fixing the sliding mounting seat.

[0011] Furthermore, the height-adjusting member includes a plurality of height-adjusting spacers stacked vertically.

[0012] Furthermore, the second mounting assembly includes a fixed mounting seat fixedly arranged on the support platform and a rotating member rotatably arranged on the upper end portion of the fixed mounting seat and detachably connected to the force transmission portion and the shaft to be measured respectively.

[0013] Furthermore, the rotating part includes a rotating part rotatably arranged on the upper end of the fixed mounting seat, a connecting flange 2 arranged on the first end of the rotating part and detachably connected to the shaft to be measured, and a connecting flange 3 arranged on the second end of the rotating part and detachably connected to the force transmission part.

[0014] Furthermore, the first force-applying structure is a first lifting chain for hanging weights of different weights, or the first force-applying structure is a first tray for containing weights of different weights.

[0015] Furthermore, the second force-applying structure is a second lifting chain for hanging weights of different weights, or the second force-applying structure is a second tray for containing weights of different weights.

[0016] Furthermore, the shaft to be tested includes a shaft body, a first universal joint arranged at the first axial end of the shaft body and connected to the first mounting assembly, and a second universal joint arranged at the second axial end of the shaft body and connected to the second mounting assembly.

[0017] The utility model has the following beneficial effects:

[0018] The transmission shaft strain gauge test and calibration platform of the present invention achieves reliable installation of the shaft to be measured by arranging a first mounting assembly and a second mounting assembly at intervals on a support platform, so that the first mounting assembly and the second mounting assembly are respectively connected to the axial ends of the shaft to be measured through the first mounting assembly and the second mounting assembly is then connected to the force transmission portion of the force assembly to measure the transmission torque of the shaft to be measured. When performing a torque calibration test, the force transmission rod is first kept horizontal, and no weights are connected to the first force structure and the second force structure, so as to record the torque-strain data of the shaft to be measured when no weights are connected. Then, weights with increasing total weights are gradually connected through the first force structure to obtain the torque-strain data of the transmission shaft under different loads in the first torque transmission direction. Then, weights with increasing total weights are gradually connected through the second force structure to obtain the torque-strain data of the transmission shaft under different loads in the second torque transmission direction. Thus, the torque-strain data in the two directions can be compared to verify the accuracy of the torque data and improve the accuracy of the calibration data. Compared with the prior art, the torque input in the test process only requires changing the total weight of the weights, resulting in a simple test process, low test cost, high test efficiency, strong practicality, and suitable for wide promotion and application.

[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a transmission shaft strain gauge test and calibration platform according to a preferred embodiment of the present utility model;

[0022] Figure 2 It is a top view of the transmission shaft strain gauge test and calibration platform of the preferred embodiment of the utility model;

[0023] Figure 3 This is a front view of a transmission shaft strain gauge test and calibration platform according to a preferred embodiment of the present invention;

[0024] Figure 4This is a structural diagram of the force transmission assembly in the transmission shaft strain gauge test and calibration platform according to a preferred embodiment of the present invention;

[0025] Figure 5 This is a structural diagram of the second mounting assembly in the transmission shaft strain gauge test and calibration platform according to a preferred embodiment of the present invention;

[0026] Figure 6 It is a partial structural diagram of the first mounting assembly in the transmission shaft strain gauge test and calibration platform of the preferred embodiment of the present utility model.

[0027] Legend:

[0028] 100. Support platform; 110. Adjustment track; 200. First mounting assembly; 210. Sliding mounting seat; 220. Connecting flange 1; 230. Height adjustment member; 300. Shaft to be measured; 310. Shaft body; 320. First universal joint; 330. Second universal joint; 400. Second mounting assembly; 410. Fixed mounting seat; 420. Rotating part; 430. Connecting flange 2; 440. Connecting flange 3; 500. Force assembly; 510. Force transmission rod; 520. Force transmission part; 530. First force structure; 540. Second force structure. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0030] like Figure 1 and Figure 4 As shown, the transmission shaft strain gauge test and calibration platform of this embodiment includes a support platform 100, a first mounting assembly 200, a shaft to be measured 300, a second mounting assembly 400 and a force assembly 500. The first mounting assembly 200 and the second mounting assembly 400 are arranged relatively spaced apart on the support platform 100 and are respectively connected to the axial ends of the shaft to be measured 300. The force assembly 500 includes a force transmission rod 510, a force transmission part 520 centrally arranged on the force transmission rod 510, a first force structure 530 arranged on the first end of the force transmission rod 510 for connecting weights of different weights, and a second force structure 540 arranged on the second end of the force transmission rod 510 for connecting weights of different weights. The second mounting assembly 400 is connected to the force transmission part 520 for transmitting torque to the shaft to be measured 300.

[0031] like Figure 1 、 Figure 2 and Figure 4As shown, specifically, the transmission shaft strain gauge test calibration bench of the utility model, through first installation assembly 200 and second installation assembly 400 are arranged at the support platform 100 interval, to be measured shaft 300's axial two ends are connected with first installation assembly 200 and second installation assembly 400 respectively, the reliable installation of to be measured shaft 300 is realized, then the force component 500's force transmission part 520 is connected through second installation assembly 400, to measure to be measured shaft 300 transmission torque, when carrying out torque calibration test, first force structure 530 and second force structure 540 are not connected with weight, to record the torque strain data of to be measured shaft 300 when not connecting weight, then the weight of the gradually increasing weight of the total body is connected through first force structure 530, to obtain the torque strain data of to be measured shaft 300 under different loads in the first transmission torque direction, then the weight of the gradually increasing weight of the total body is connected through second force structure 540, to obtain the torque strain data of to be measured shaft 300 under different loads in the second transmission torque direction, so that the torque strain data in two directions can be compared, the torque data accuracy is verified, and the calibration data precision is improved, relative to prior art, torque input only needs to change the total weight of the weight in the testing process, the testing process is simple, the testing cost is low, the testing efficiency is high, the practicality is strong, is suitable for being widely promoted and application.

[0032] It should be understood that different weights of the weight can be connected by increasing the number of the weight, so that different weights of the weight can be connected by replacing the weight, thereby realizing the change of the total weight of the weight.

[0033] As Figure 1 shown, in the embodiment, the support end of the support platform 100 is provided with an adjustment track 110 along the axial direction of the shaft to be measured 300, and the first installation assembly 200 is slidably adjusted and fixedly arranged on the adjustment track 110. Specifically, the first installation assembly 200 is slid on the adjustment track 110 to adjust the distance between the first installation assembly 200 and the second installation assembly 400, thereby adapting to the installation of the shaft to be measured 300 with different axial lengths, and improving the versatility of the transmission shaft strain gauge test calibration bench.

[0034] As Figure 1 and Figure 6As shown, in this embodiment, the first mounting assembly 200 includes a sliding mounting seat 210 that is fixedly arranged on the adjustment rail 110 after being slidably adjusted, a connecting flange 1 220 that is arranged on the upper end of the sliding mounting seat 210 and detachably connected to the shaft to be measured 300, and a height adjustment member 230 that is arranged at the bottom of the sliding mounting seat 210 to adjust the height of the connecting flange 1 220. Specifically, the sliding mounting seat 210 is slidably adjusted and fixedly arranged on the adjustment rail 110, and is detachably connected to the shaft to be measured 300 through the connecting flange 1 220 to adapt to installations of different axial lengths. The height adjustment member 230 is then arranged at the bottom of the sliding mounting seat 210 to indirectly adjust the height of the connecting flange 1 220 by adjusting the height of the sliding mounting seat 210, thereby achieving the installation requirements of the transmission shaft at different angles.

[0035] like Figure 3 As shown, in this embodiment, the shaft to be tested 300 includes a shaft body 310, a first universal joint 320 disposed at a first axial end of the shaft body 310 and connected to the first mounting assembly 200, and a second universal joint 330 disposed at a second axial end of the shaft body 310 and connected to the second mounting assembly 400. Specifically, the shaft is connected to the first mounting assembly 200 via the first universal joint 320, and then to the second mounting assembly 400 via the second universal joint 330. When the height adjustment member 230 indirectly adjusts the height of the connecting flange 1 220, the first universal joint 320 and the second universal joint 330 are used to achieve different drive shaft installation requirements at different angles.

[0036] like Figure 1 As shown, in this embodiment, the adjustment rail 110 is provided with a plurality of fixing holes arranged at intervals along the sliding direction for fixing the sliding mounting seat 210. Specifically, the sliding mounting seat 210 is provided with a mounting hole 1 arranged corresponding to the fixing hole. When the sliding mounting seat 210 slides into position on the adjustment rail 110 to meet the installation requirements of the test shaft 300 of the corresponding axial length, screws are inserted through the mounting hole 1 and the fixing hole to fix the sliding mounting seat 210 to the adjustment rail 110, ensuring reliable installation of the test shaft 300, stable torque transmission, and high accuracy of calibration data.

[0037] In this embodiment, the height adjustment member 230 includes a plurality of height adjustment shims stacked vertically. Specifically, by selecting different numbers of height adjustment shims to stack vertically, the height of the sliding mounting base 210 can be adjusted, thereby indirectly adjusting the height of the connecting flange 1 220, thereby achieving different angles of transmission shaft installation requirements. Optionally, the height adjustment shims are provided with mounting holes 2 arranged corresponding to the fixing holes.

[0038] like Figure 1 and Figure 5As shown, in this embodiment, the second mounting assembly 400 includes a fixed mounting base 410 fixedly disposed on the support platform 100, and a rotating member rotatably disposed on the upper end of the fixed mounting base 410 and detachably connected to the force transmission portion 520 and the shaft to be measured 300. Specifically, by rotatably disposing the rotating member on the upper end of the fixed mounting base 410 and detachably connecting to the force transmission portion 520 and the shaft to be measured 300 via the rotating member, when the total weight of the weight is increased or decreased, torque is sequentially transmitted through the force transmission portion 520 and the rotating member, thereby obtaining torque-strain data of the shaft to be measured 300 under different loading conditions.

[0039] like Figure 1 and Figure 5 As shown, in this embodiment, the rotating member includes a rotating portion 420 rotatably disposed on the upper end of the fixed mounting base 410, a second connecting flange 430 disposed on the first end of the rotating portion 420 and removably connected to the shaft to be measured 300, and a third connecting flange 440 disposed on the second end of the rotating portion 420 and removably connected to the force transmission portion 520. Specifically, the rotating portion 420 is connected to the shaft to be measured 300 via the second connecting flange 430 and is connected to the force transmission portion 520 via the third connecting flange 440, thereby transmitting the torque applied by the force assembly 500 to the shaft to be measured 300 to obtain torque strain data of the shaft to be measured 300. Optionally, the force transmission portion 520 is provided with a fourth connecting flange connected to the third connecting flange 440.

[0040] like Figure 4 As shown, in this embodiment, the first force-applying structure 530 is a first lifting chain for hanging weights of different weights, so that the total weight of the weights is gradually increased by hanging weights of different weights through the first lifting chain, thereby obtaining the torque strain data of the shaft to be measured 300 under different loadings in the first torque transmission direction.

[0041] In another embodiment, the first force-applying structure 530 is a first tray for holding weights of different weights. By holding weights of different weights on the first tray, the total weight of the weights is gradually increased, thereby obtaining torque strain data of the shaft 300 under different loadings in the first torque transmission direction.

[0042] like Figure 4 As shown, in this embodiment, the second force-applying structure 540 is a second lifting chain for hanging weights of different weights, so that the total weight of the weights is gradually increased by hanging weights of different weights through the second lifting chain, thereby obtaining the torque strain data of the shaft 300 to be measured under different loadings in the second torque transmission direction.

[0043] In another embodiment, the second force applying structure 540 is a second tray for containing different weight weights, so that the total weight of the weights is gradually increased by containing different weight weights in the second tray, so as to obtain the torque strain data of the shaft 300 to be tested under different loads in the second torque direction.

[0044] The preferred embodiments of the present application have been described above with the preferred embodiments, but are not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A transmission shaft strain gauge test and calibration platform, characterized in that: The invention comprises a support platform (100), a first mounting assembly (200), a shaft to be measured (300), a second mounting assembly (400) and a force-applying assembly (500). The first mounting assembly (200) and the second mounting assembly (400) are arranged on the support platform (100) at intervals and are respectively connected to the two axial ends of the shaft to be measured (300). The force-applying assembly (500) comprises a force transmission rod (510), a force transmission portion (520) centrally arranged on the force transmission rod (510), a first force-applying structure (530) arranged on the first end of the force transmission rod (510) for connecting weights of different weights, and a second force-applying structure (540) arranged on the second end of the force transmission rod (510) for connecting weights of different weights. The second mounting assembly (400) is connected to the force transmission portion (520) for transmitting torque to the shaft to be measured (300).

2. The transmission shaft strain gauge test and calibration platform according to claim 1, characterized in that: An adjustment track (110) is arranged at the supporting end of the support platform (100) along the axial direction of the shaft to be measured (300), and the first mounting assembly (200) is fixedly arranged on the adjustment track (110) after being slidably adjusted.

3. The transmission shaft strain gauge test and calibration platform according to claim 2, characterized in that: The first mounting assembly (200) comprises a sliding mounting seat (210) which is fixedly arranged on the adjustment rail (110) after being slidably adjusted, a connecting flange (220) which is arranged on the upper end of the sliding mounting seat (210) and is detachably connected to the shaft to be measured (300), and a height adjustment member (230) which is arranged on the bottom of the sliding mounting seat (210) to adjust the height of the connecting flange (220).

4. The transmission shaft strain gauge test and calibration platform according to claim 3, characterized in that: The adjustment track (110) is provided with a plurality of fixing holes arranged at intervals along the sliding direction for fixing the sliding mounting seat (210).

5. The transmission shaft strain gauge test and calibration platform according to claim 3, characterized in that: The height-adjusting member (230) comprises a plurality of height-adjusting spacers stacked vertically.

6. The transmission shaft strain gauge test and calibration platform according to any one of claims 1 to 5, characterized in that: The second mounting assembly (400) comprises a fixed mounting seat (410) fixedly arranged on the supporting platform (100) and a rotating member rotatably arranged on the upper end of the fixed mounting seat (410) and detachably connected to the force transmission portion (520) and the shaft to be measured (300), respectively.

7. The transmission shaft strain gauge test and calibration platform according to claim 6, characterized in that: The rotating member includes a rotating portion (420) rotatably arranged on the upper end of the fixed mounting seat (410), a second connecting flange (430) arranged on the first end of the rotating portion (420) and detachably connected to the shaft to be measured (300), and a third connecting flange (440) arranged on the second end of the rotating portion (420) and detachably connected to the force transmission portion (520).

8. The transmission shaft strain gauge test and calibration platform according to any one of claims 1 to 5, characterized in that: The first force-adding structure (530) is a first lifting chain for hanging weights of different weights, or The first force-applying structure (530) is a first tray for containing weights of different weights.

9. The transmission shaft strain gauge test and calibration platform according to any one of claims 1 to 5, characterized in that: The second force-adding structure (540) is a second lifting chain for hanging weights of different weights, or The second force-applying structure (540) is a second tray for containing weights of different weights.

10. The transmission shaft strain gauge test and calibration platform according to any one of claims 1 to 5, characterized in that: The shaft to be tested (300) comprises a shaft body (310), a first universal joint (320) arranged at a first axial end of the shaft body (310) and connected to a first mounting assembly (200), and a second universal joint (330) arranged at a second axial end of the shaft body (310) and connected to a second mounting assembly (400).

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