Performance test device for transmission shaft of automobile steering system

Abstract

The invention discloses an automobile steering system transmission shaft performance test device, and belongs to the technical field of steering transmission shaft performance detection. The device mainly comprises a detection table; a first platform is arranged on the two groups of first guide rails; the output end of the first motor is sequentially connected with a torque sensor and a first clamp holder; the first motor is connected with the torque sensor through a harmonic reducer, and an output shaft of the torque sensor is connected with the first clamp holder through a coupler; the angular displacement sensor is connected to an output shaft of the first motor in a sleeving manner; a second motor is arranged on the second platform; and the first bidirectional screw rod is connected with two groups of clamping plates. According to the automobile steering system transmission shaft performance test device, through arrangement of the detection mechanism, the fixing mechanism and the buffer mechanism, the two ends of the transmission shaft are kept coaxial, and meanwhile, the spline shaft is prevented from impacting the end part of the inner cavity of the spline sleeve to cause damage to the spline shaft and the spline sleeve.

Description

Technical Field

[0001] The present application relates to the technical field of steering transmission shaft performance detection, and in particular to a performance test device for a transmission shaft of an automobile steering system. Background Art

[0002] The steering drive shaft is the core component of the automobile steering operating system mechanism. Its function is to transmit the driver's steering wheel operating force to the steering gear, and ultimately control the driving direction of the automobile wheels. During the driving process of the car, the driver will generate torques of different sizes and directions by constantly changing the driving direction. Therefore, the performance of the automobile steering drive shaft is crucial to the safety of the car.

[0003] For example, the patent with the announcement number CN109253879B discloses a steering transmission shaft performance test device, including a first guide rail, a first platform, a first motor, a torque sensor, a three-jaw chuck, a second platform, a second clamp, a spring tube pressure sensor and a display, wherein the second clamp includes a V-shaped block bolted to the top of the second platform, a pressure block is connected to the V-shaped block by two bolts, and the V-shaped block, the V-shaped groove and the pressure block form an external clamping arrangement for the spline sleeve. Thus, the torque test and telescopic thrust test of the transmission shaft are realized.

[0004] Although the above device realizes the torque test and telescopic thrust test of the steering drive shaft, since the three-jaw chuck fixes one end of the drive shaft, it is relatively stable and can ensure the axis center position, but at the other end, it is fixed by a clamp composed of a V-block and a pressure block. If the diameter of the drive shaft increases, the position of the pressure block needs to be adjusted to adapt to the new diameter. During the adjustment process, it is difficult to ensure that the axis center position of the drive shaft is exactly the same after each adjustment, because the V-block and the pressure block mainly clamp the drive shaft from the outside, which is more sensitive to diameter changes. If the height and position of the pressure block cannot be accurately adjusted, the drive shaft will have a slight offset after clamping, resulting in different axis centers. This may affect subsequent performance testing, so it is necessary to provide a performance test device for the automotive steering system drive shaft to solve the above problems.

[0005] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a performance test device for the transmission shaft of an automobile steering system, so that when the spline shaft is retracted to the extreme position in the spline sleeve, appropriate buffering is performed to avoid the spline shaft hitting the end of the inner cavity of the spline sleeve, causing damage to the spline shaft and the spline sleeve.

[0007] The technical solution adopted by the present application to solve its technical problems is: a detection table; a detection mechanism, which is installed on the detection table, and the detection mechanism includes: two groups of first guide rails, which are installed on the detection table, and a first platform is slidably installed on the two groups of the first guide rails; a first motor, which is installed on the first platform, and the output end of the first motor is connected to a torque sensor and a first clamp in sequence; the output shaft of the first motor is connected to the input shaft of the torque sensor through a harmonic reducer, and the output shaft of the torque sensor is connected to the first clamp through a coupling, and the first clamp is a three-jaw chuck; an angular displacement sensor, which is sleeved on the output shaft of the first motor; a fixing mechanism, which is installed on the detection table, and the fixing mechanism includes: a second platform, which is installed on the On the testing platform, a fixing seat is installed on the second platform, and a second motor is installed on the side of the fixing seat; a first bidirectional screw is installed on the output end of the second motor, and two groups of clamping plates are threadedly connected to the first bidirectional screw; a first V-shaped block is installed on the side of the two groups of clamping plates close to each other; an oil cylinder is installed on the testing platform, side ears are installed on both sides of the first platform, and a spring tube pressure sensor is installed on the side of the side ear close to the oil cylinder, and the output end of the oil cylinder is connected to one end of the spring tube pressure sensor; wherein: the second motor is suitable for starting, so as to drive the first bidirectional screw to rotate, so that the two groups of clamping plates are close to each other, and then the first V-shaped block can clamp the end of the spline sleeve, so that the spline shaft and the spline sleeve remain coaxial.

[0008] Furthermore, a buffer mechanism is installed on the second platform, and the buffer mechanism includes a second guide rail installed on the second platform, a sliding block is installed on the second guide rail, the fixed seat is installed on the sliding block, a third guide rail is installed on the side of the second guide rail, a mounting block is slidably installed on the side of the third guide rail, a rack is installed on the mounting block, and the rack has a smooth area and a toothed area connected to the smooth area.

[0009] Furthermore, a slide is installed on the second platform at one end of the second guide rail, positioning seats are installed at both ends of the slide, a second bidirectional screw is installed on a bearing between the two groups of the positioning seats, a gear is installed at one end of the second bidirectional screw, the gear is suitable for meshing with the rack, and the smooth area of ​​the rack is at the upper end position of the gear.

[0010] Furthermore, two groups of moving seats are threadedly connected on the second bidirectional screw, two groups of second V-shaped blocks arranged opposite to each other are installed on the moving seat, and a limiting rod is installed on the side of the sliding block, and one end of the limiting rod has a convex ball.

[0011] Further, a slide bar is installed on the mounting block, a slide groove is provided on the slide bar, a slider is installed on the bottom surface of the fixed seat, the slider extends into the slide groove, the width of the slider is smaller than the width of the slide groove, the slider of the fixed seat is located at the center of the slide bar, and a cylinder is installed on the detection table; The slide bar has a protruding end, a first spring is installed on the side of the protruding end, a fixing bar is installed on the second platform, and the other end of the first spring is fixedly connected to the side of the fixing bar.

[0012] Furthermore, two groups of alignment rods are installed on the first clamp, two groups of arc rings are installed on the fixed seat, the two groups of the first V-shaped blocks are respectively attached to the inner walls of the two groups of the arc rings, and the first V-shaped blocks are movable through the arc rings and connected to the clamping plate.

[0013] Furthermore, a push rod is installed at one end of the alignment rod, a clamping block is installed on the side of the push rod, a support rod is installed on the rack, an alignment column is installed on the support rod, and the alignment column has a boss; A right-angle frame is installed on the second guide rail, a second spring is installed on the right-angle frame, and one end of the second spring is fixedly connected to the side surface of the sliding block.

[0014] Furthermore, a T-shaped rod is installed on a side of the fixing seat close to the clamping plate, and an open groove adapted to the T-shaped rod is opened on the clamping plate.

[0015] Furthermore, the position of the first V-shaped block in contact with the surface of the spline sleeve is covered with a ceramic particle wear-resistant layer.

[0016] Furthermore, the torque sensor, the spring tube pressure sensor, the first motor, the second motor, and the angular displacement sensor are electrically connected via a PLC control circuit, and the torque sensor and the spring tube pressure sensor are electrically connected to a display.

[0017] The beneficial effect of the present application is that the automobile steering system drive shaft performance test device provided by the present application, through the arrangement of the second platform, the fixing seat, the second motor, the first bidirectional screw, the clamping plate, the first V-shaped block, the arc ring and the buffer mechanism, can achieve the purpose of keeping the two ends of the drive shaft coaxial when the steering drive shaft is subjected to telescopic thrust testing, and at the same time, when the spline shaft is retracted to the extreme position in the spline sleeve, appropriate buffering is performed to avoid the spline shaft from hitting the end of the inner cavity of the spline sleeve, causing damage to the spline shaft and the spline sleeve.

[0018] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is an overall schematic diagram of the vehicle steering system transmission shaft performance test device in this application; Figure 2 for Figure 1 Working diagram of Figure 3 for Figure 2 Schematic diagram of the local structure in; Figure 4 for Figure 3 A is an enlarged schematic diagram; Figure 5 for Figure 4 The enlarged schematic diagram of point B in FIG. Figure 6 for Figure 4 The enlarged schematic diagram of point C in FIG. Figure 7 for Figure 3 Schematic diagram of the local structure in; Among them, the reference numerals in the figure are: 1. Testing table; 2. Detection mechanism; 201. First guide rail; 202. First platform; 203. Side ears; 204. Spring tube pressure sensor; 205. Oil cylinder; 206. First motor; 207. Harmonic reducer; 208. Torque sensor; 209. Angular displacement sensor; 210. First clamp; 3. Display; 4. Fixing mechanism; 401. Second platform; 402. Fixing seat; 403. Second motor; 404. First bidirectional screw; 405. Clamping plate; 406. First V-shaped block; 407. Arc ring; 5. Buffer mechanism; 501. Second guide rail; 502. Sliding block; 503. Limiting rod; 504. Sliding rod; 505. Sliding groove; 506. Mounting block; 507. Rack; 508. Slide; 509. Positioning seat; 510. Second bidirectional screw; 511. Gear; 512. Moving seat; 513. Second V-shaped block; 514. Alignment rod; 515. Push rod; 516. Block; 517. Support rod; 518. Alignment column; 519. Third guide rail; 520. Cylinder; 521. First spring; 522. Fixing rod; 523. Right-angle bracket; 524. Second spring. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0022] Embodiment 1: Figure 1-Figure 4 As shown, the present application provides a performance test device for a vehicle steering system transmission shaft, comprising a test bench 1, and a test mechanism 2 installed on the test bench 1, the test mechanism 2 is used to perform a torque test and a telescopic thrust test on the steering transmission shaft, the test mechanism 2 comprises two sets of first guide rails 201 fixedly installed on the test bench 1; A first platform 202 is slidably mounted on the two sets of first guide rails 201, and a first motor 206 is fixedly mounted on the first platform 202. A torque sensor 208 and a first clamp 210 are sequentially connected to the output end of the first motor 206. The output shaft of the first motor 206 is connected to the input shaft of the torque sensor 208 through a harmonic reducer 207. The output shaft of the torque sensor 208 is connected to the first clamp 210 through a coupling. The first clamp 210 is a three-jaw chuck. An angular displacement sensor 209 is sleeved on the output shaft of the first motor 206. The angular displacement sensor 209 can measure the phase angle rotation in the rotation torque test, so as to further eliminate the influence of external factors such as idling, gear slip of the reducer, etc. according to the situation; It should be noted that the steering transmission shaft includes a spline sleeve and a spline shaft that are sleeved together, and a universal joint is connected to the ends of the spline sleeve and the spline shaft that are away from each other, and a clamping shaft is connected to the two universal joints. The two clamping parts are used to connect the two ends of the steering transmission shaft to the outside, wherein the clamping part at the end of the spline shaft is detachably fixed to the upper end of the first platform 202 through a first clamper 210; like Figure 3-Figure 4As shown, a fixing mechanism 4 is fixedly installed on the detection platform 1, and the fixing mechanism 4 is used to fix the clamping part of the end of the spline sleeve, and the fixing mechanism 4 includes a second platform 401 fixedly installed on the detection platform 1, a fixing seat 402 is installed on the second platform 401, and a second motor 403 is fixedly installed on the side of the fixing seat 402, and a first bidirectional screw 404 is fixedly installed on the output end of the second motor 403, and the first bidirectional screw 404 is bearing-mounted with the second platform 401, and two sets of clamping plates 405 are threadedly connected on the first bidirectional screw 404; At the same time, a T-shaped rod (not shown in the figure) is fixedly installed on one side of the fixing seat 402 close to the clamping plate 405, and an opening groove adapted to the T-shaped rod is opened on the clamping plate 405, and the T-shaped rod is suitable for linearly limiting the movement of the two sets of clamping plates 405; A first V-shaped block 406 is fixedly mounted on the mutually adjacent surfaces of the two sets of clamping plates 405, so that the first bidirectional screw 404 is adapted to rotate along with the output end of the second motor 403, so that the two sets of clamping plates 405 are mutually adjacent or distant, and the two sets of first V-shaped blocks 406 can clamp the clamping portion of the end of the spline sleeve, and the axis of the clamping of the two sets of first V-shaped blocks 406 is coaxial with the first clamper 210, so that the spline sleeve and the spline shaft remain coaxial; like Figure 3 As shown, a cylinder 205 is fixedly installed on the test platform 1, and side ears 203 are fixedly installed on both sides of the first platform 202, and a spring tube pressure sensor 204 is fixedly installed on one side of the side ears 203 close to the cylinder 205. The spring tube pressure sensor 204 is used to detect the thrust size and the extension and contraction amount of the transmission shaft, and the output end of the cylinder 205 is connected to one end of the spring tube pressure sensor 204, so that the cylinder 205 is suitable for starting to contact with the side ears 203 and push the first platform 202 to move; It should be noted that the torque sensor 208, the spring tube pressure sensor 204, the first motor 206, the second motor 403, the angular displacement sensor 209, etc. all collect, judge and display data through a common PLC control circuit. The torque sensor 208 and the spring tube pressure sensor 204 are electrically connected to a display 3, which is fixedly installed on the test bench 1 to display the detected values ​​through the display 3 for the convenience of observation and recording by the test personnel; In summary: during the inspection, the clamping portion of the spline shaft end of the steering transmission shaft is fixed on the first clamper 210, and the clamping portion of the spline sleeve end is placed on the first V-shaped block 406 located at the lower end, and the first bidirectional screw 404 is driven to rotate by the second motor 403, so that the two sets of clamping plates 405 are moved closer to or farther from each other, so that the first V-shaped block 406 can fix the clamping portion of the spline sleeve end; After the clamping is completed, the first motor 206 rotates and finally drives the spline shaft to rotate. At this time, the torque sensor 208 measures the torque value during the rotation and displays it through the display 3; It should be noted that the position of the first V-shaped block 406 that contacts the surface of the clamping portion of the spline sleeve end is covered with a ceramic particle wear-resistant layer, and the ceramic particle wear-resistant layer is used to prevent the surface of the clamping portion of the spline sleeve end from being damaged during the rotation torque test; When detecting the relative driving force, the first platform 202 is driven to move toward the second platform 401 through the movement of the output end of the oil cylinder 205, that is, the spline shaft is pushed toward the spline sleeve. At this time, the friction between them is squeezed through the spring tube pressure sensor 204 to measure the driving force. When the driving force output by the oil cylinder 205 is greater than the maximum static friction between the spline sleeve and the spline shaft, relative retraction occurs. At this time, the force pushing the first platform 202 no longer increases, and the spring tube pressure sensor 204 measures the required thrust value and displays it through the display 3; Therefore, when testing steering transmission shafts with different shaft diameters, the clamping portion of the spline sleeve end is fixed by the fixing mechanism 4 to maintain the coaxiality with the first clamper 210 when fixing the spline shaft, thereby avoiding the interference of additional bending force or lateral force caused by eccentricity on the telescopic test result, so that the telescopic amount of the steering rotating shaft under normal working conditions can be accurately measured; secondly, the wear of components is reduced; the coaxial state can make the cooperation between the splines in an ideal state, making the force transmission more uniform; if the axes are not the same, the spline sleeve and the spline shaft are prone to local excessive force, resulting in increased wear, and the coaxial state is beneficial to protecting the spline structure and extending the service life of the rotating shaft.

[0023] Embodiment 2: After the steering transmission shaft is subjected to the telescopic thrust test in the above embodiment, the impact force when the oil cylinder 205 pushes the spline shaft to retract is relatively large. When the spline shaft is retracted to the limit position, the spline shaft will hit the inner end of the spline sleeve with the remaining kinetic energy; this may cause damage to the spline shaft and the spline sleeve, such as deformation of the spline shaft and wear of the end of the spline sleeve, and may even affect the performance and service life of the entire steering transmission shaft; In order to solve the above problems, Figure 3-Figure 6 As shown, a buffer mechanism 5 is installed on the second platform 401, and the buffer mechanism 5 includes a second guide rail 501 fixedly installed on the second platform 401, and a sliding block 502 is slidably installed on the second guide rail 501. In this embodiment, the fixed seat 402 is installed on the sliding block 502, so that the fixed seat 402 can move synchronously with the sliding block 502; A third guide rail 519 is fixedly installed on the second platform 401 at the side of the second guide rail 501, and a mounting block 506 is slidably installed on the side of the third guide rail 519, and a rack 507 is fixedly installed on the mounting block 506, the rack 507 is suitable for sliding on the third guide rail 519 synchronously with the mounting block 506, and the rack 507 has a smooth area and a toothed area connected to the smooth area; At the same time, a slide 508 is fixedly installed on the second platform 401 at one end of the second guide rail 501, and positioning seats 509 are fixedly installed at both ends of the slide 508, and a second bidirectional screw 510 is installed on a bearing between the two sets of positioning seats 509, the second bidirectional screw 510 is suitable for rotation, and a gear 511 is fixedly installed at one end of the second bidirectional screw 510, the gear 511 is suitable for meshing with the rack 507, and in the initial state, the smooth area of ​​the rack 507 is at the upper end position of the gear 511, and as the rack 507 approaches the gear 511, the toothed area on the rack 507 meshes with the gear 511, and drives the gear 511 to rotate; Two sets of moving seats 512 are threadedly connected to the second bidirectional screw 510, and two sets of second V-shaped blocks 513 are fixedly installed on the moving seats 512, so that when the gear 511 rotates, the second bidirectional screw 510 can be driven to rotate synchronously, thereby making the two sets of second V-shaped blocks 513 approach or move away from each other; At the same time, a limiting rod 503 is fixedly installed on the side of the sliding block 502, so that the limiting rod 503 can move synchronously with the sliding block 502 and approach the two sets of second V-shaped blocks 513, and the two sets of second V-shaped blocks 513 are suitable for engaging with each other to clamp the limiting rod 503. In this embodiment, a convex ball is provided at one end of the limiting rod 503, and the convex ball is used to prevent the limiting rod 503 from falling out from between the two sets of second V-shaped blocks 513; like Figure 3 and Figure 4-Figure 7 As shown, a slide bar 504 is fixedly mounted on the mounting block 506, a slide groove 505 is provided on the slide bar 504, and a slider (not shown in the figure) is fixedly mounted on the bottom surface of the fixed seat 402, the slider extends into the slide groove 505, the width of the slider is smaller than the width of the slide groove 505, and in the initial state, the slider of the fixed seat 402 is located in the center of the slide groove 505, and a cylinder 520 is fixedly mounted on the detection table 1; The slide bar 504 has a protruding end (such as Figure 7 ), and a first spring 521 is fixedly installed on the side of the protruding end, and a fixing rod 522 is fixedly installed on the second platform 401, and the other end of the first spring 521 is fixedly connected to the side of the fixing rod 522, so that the first spring 521 is used to limit the initial position of the sliding rod 504; The telescopic end of the cylinder 520 is thus suitable for contacting the side of the slide bar 504 to push the slide bar 504 to move, and is suitable for stretching the first spring 521, thereby driving the mounting block 506 to move, and the mounting block 506 drives the rack 507 to move, at this time, the smooth area of ​​the rack 507 moves on the upper end of the gear 511, and the gear 511 does not rotate. With the continuous pushing of the cylinder 520, at this time, one end of the inner wall of the slide groove 505 contacts the side of the slider, thereby driving the fixed seat 402 to move synchronously, and at the same time driving the limiting rod 503 to move, until the convex ball at one end of the limiting rod 503 passes through the two sets of second V-shaped blocks 513 arranged oppositely, at this time, the toothed area of ​​the rack 507 contacts the gear 511 and drives the gear 511 to rotate, and clamps the limiting rod 503 tightly to fix the fixed seat 402 on the second guide rail 501; Then, the clamping part of the spline shaft end of the steering transmission shaft is fixed to the first clamper 210, and the clamping part of the spline sleeve end of the steering transmission shaft is placed on the first V-shaped block 406 located at the lower end, and the clamping part of the spline shaft end is fixed by the first clamper 210. At the same time, the second motor 403 drives the first bidirectional screw 404 to rotate, so that the two groups of clamping plates 405 are close to each other, so that the first V-shaped block 406 can fix and clamp the end of the spline sleeve, thereby completing the fixation of the two ends of the steering transmission shaft and keeping the spline shaft and the spline sleeve coaxial, and then the cylinder 520 returns to the initial position; like Figure 3-Figure 7 As shown, two sets of alignment rods 514 (such as Figure 3 ), in this embodiment, two groups of arc rings 407 are fixedly mounted on the fixing seat 402, and the two groups of first V-shaped blocks 406 are respectively attached to the inner walls of the two groups of arc rings 407, and the first V-shaped blocks 406 movably penetrate the arc rings 407 and are connected to the clamping plate 405; A push rod 515 is fixedly installed at one end of the alignment rod 514, a clamping block 516 is fixedly installed on the side of the push rod 515, and a support rod 517 is fixedly installed on the rack 507, and an alignment column 518 is fixedly installed on the support rod 517, and the alignment column 518 has a boss; Meanwhile, a right angle bracket 523 is fixedly mounted on the second guide rail 501, and a second spring 524 is fixedly mounted on the right angle bracket 523, and one end of the second spring 524 is fixedly connected to the side surface of the sliding block 502, and the second spring 524 is used to limit the initial position of the fixed seat 402; Therefore, when the output end of the starter oil cylinder 205 moves, the first platform 202 moves toward the second platform 401, that is, the spline shaft is pushed toward the spline sleeve. At this time, the friction between them is squeezed and deformed through the spring tube pressure sensor 204, and the driving force is measured by the degree of deformation; When the driving force output by the oil cylinder 205 is greater than the maximum static friction between the spline sleeve and the spline shaft, the spline sleeve and the spline shaft are retracted relative to each other, so that the first clamper 210 drives the alignment rod 514 to gradually approach the support rod 517, and because the clamping block 516 is located at the front side of the push rod 515, the clamping block 516 first contacts the alignment column 518, and at this time, the spline shaft and the inner cavity end of the spline sleeve have a certain distance; As the block 516 continues to push the alignment post 518, the alignment post 518 pushes the rack 507, and the rack 507 then drives the gear 511 to rotate. At the same time, the rack 507 drives the slide bar 504 to move. Since the fixed seat 402 is in the slide groove 505 through the slider, the rack 507 first drives the gear 511 to rotate, and the two sets of second V-shaped blocks 513 move away from each other. At the same time, the spline shaft gradually retracts into the spline sleeve and approaches the end of the spline sleeve inner cavity. At this time, the limiting rod 50 3, the convex ball at one end of the spline sleeve is released from between the two sets of second V-shaped blocks 513, and at the same time, the slider at the bottom end of the fixed seat 402 is fitted to the position of one end of the inner wall of the slide groove 505, and at this time, the fixed seat 402 moves synchronously with the slide rod 504 and squeezes the second spring 524, so that the spline sleeve can move synchronously with the spline shaft, thereby achieving appropriate buffering when the spline shaft is retracted into the spline sleeve, so as to avoid the spline shaft from hitting the end of the spline sleeve inner cavity, causing damage to the spline shaft and the spline sleeve; Then, as the telescopic end of the cylinder 205 moves to the specified position for reset, the first platform 202 moves synchronously with the output end of the cylinder 205, the slide rod 504 is restored to its initial state by the action of the first spring 521, and the fixed seat 402 is restored to its initial state by the action of the second spring 524, thereby restoring the spline sleeve and the spline shaft to their initial state.

[0024] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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. Automobile steering system transmission shaft performance test device, characterized by: include: Testing station (1); A detection mechanism (2), the detection mechanism (2) is installed on the detection platform (1), and the detection mechanism (2) comprises: Two groups of first guide rails (201), the first guide rails (201) being mounted on the detection platform (1), and first platforms (202) being slidably mounted on the two groups of first guide rails (201); A first motor (206), the first motor (206) being mounted on the first platform (202), the output end of the first motor (206) being connected in sequence to a torque sensor (208) and a first clamp (210); The output shaft of the first motor (206) is connected to the input shaft of the torque sensor (208) via a harmonic reducer (207), and the output shaft of the torque sensor (208) is connected to a first clamp (210) via a coupling, and the first clamp (210) is a three-jaw chuck; An angular displacement sensor (209), the angular displacement sensor (209) being sleeved on an output shaft of the first motor (206); A fixing mechanism (4), the fixing mechanism (4) being mounted on the detection platform (1), the fixing mechanism (4) comprising: A second platform (401), the second platform (401) being mounted on the detection platform (1), a fixing seat (402) being mounted on the second platform (401), and a second motor (403) being mounted on a side of the fixing seat (402); A first bidirectional screw (404), the first bidirectional screw (404) being mounted on the output end of the second motor (403), and two sets of clamping plates (405) being threadedly connected to the first bidirectional screw (404); A first V-shaped block (406), the first V-shaped block (406) being mounted on the sides of the two groups of clamping plates (405) that are close to each other; An oil cylinder (205), the oil cylinder (205) being installed on the detection platform (1), side ears (203) being installed on both sides of the first platform (202), a spring tube pressure sensor (204) being installed on a side of the side ears (203) close to the oil cylinder (205), and an output end of the oil cylinder (205) being connected to one end of the spring tube pressure sensor (204); Wherein: the second motor (403) is suitable for starting to drive the first bidirectional screw (404) to rotate, so that the two groups of clamping plates (405) are close to each other, and then the first V-shaped block (406) can clamp the end of the spline sleeve, so that the spline shaft and the spline sleeve remain coaxial.

2. The vehicle steering system transmission shaft performance test device according to claim 1 is characterized in that: A buffer mechanism (5) is installed on the second platform (401), and the buffer mechanism (5) comprises a second guide rail (501) installed on the second platform (401), a sliding block (502) is installed on the second guide rail (501), and the fixed seat (402) is installed on the sliding block (502), a third guide rail (519) is installed on the side of the second guide rail (501), and a mounting block (506) is slidably installed on the side of the third guide rail (519), and a rack (507) is installed on the mounting block (506), and the rack (507) has a smooth area and a toothed area connected to the smooth area.

3. The vehicle steering system transmission shaft performance test device according to claim 2 is characterized in that: A slide (508) is installed on the second platform (401) at one end of the second guide rail (501), and positioning seats (509) are installed at both ends of the slide (508). A second bidirectional screw (510) is installed on a bearing between the two groups of the positioning seats (509), and a gear (511) is installed at one end of the second bidirectional screw (510). The gear (511) is suitable for meshing with the rack (507), and the smooth area of ​​the rack (507) is located at the upper end position of the gear (511).

4. The vehicle steering system transmission shaft performance test device according to claim 3 is characterized in that: The second bidirectional screw (510) is threadedly connected with two groups of movable seats (512), and the movable seats (512) are equipped with two groups of second V-shaped blocks (513) arranged opposite to each other. A limiting rod (503) is installed on the side of the sliding block (502), and one end of the limiting rod (503) has a convex ball.

5. The vehicle steering system transmission shaft performance test device according to claim 4 is characterized in that: A slide bar (504) is installed on the mounting block (506), a slide groove (505) is provided on the slide bar (504), a slider is installed on the bottom surface of the fixed seat (402), the slider extends into the slide groove (505), the width of the slider is smaller than the width of the slide groove (505), the slider of the fixed seat (402) is located at the center of the slide bar (504), and a cylinder (520) is installed on the detection platform (1); The sliding rod (504) has a protruding end, a first spring (521) is installed on the side of the protruding end, a fixing rod (522) is installed on the second platform (401), and the other end of the first spring (521) is fixedly connected to the side of the fixing rod (522).

6. The vehicle steering system transmission shaft performance test device according to claim 5, characterized in that: Two groups of alignment rods (514) are installed on the first clamp (210), and two groups of arc rings (407) are installed on the fixed seat (402). The two groups of the first V-shaped blocks (406) are respectively attached to the inner walls of the two groups of the arc rings (407), and the first V-shaped blocks (406) are movable through the arc rings (407) and connected to the clamping plate (405).

7. The vehicle steering system transmission shaft performance test device according to claim 6, characterized in that: A push rod (515) is installed at one end of the alignment rod (514), a clamping block (516) is installed on the side of the push rod (515), a support rod (517) is installed on the rack (507), an alignment column (518) is installed on the support rod (517), and the alignment column (518) has a boss; A right-angle frame (523) is installed on the second guide rail (501), and a second spring (524) is installed on the right-angle frame (523), and one end of the second spring (524) is fixedly connected to the side surface of the sliding block (502).

8. The vehicle steering system transmission shaft performance test device according to claim 7, characterized in that: A T-shaped rod is installed on a surface of the fixing seat (402) close to the clamping plate (405), and an open groove adapted to the T-shaped rod is opened on the clamping plate (405).

9. The vehicle steering system transmission shaft performance test device according to claim 8, characterized in that: The position of the first V-shaped block (406) in contact with the surface of the spline sleeve is covered with a ceramic particle wear-resistant layer.

10. The vehicle steering system transmission shaft performance test device according to claim 9, characterized in that: The torque sensor (208), the spring tube pressure sensor (204), the first motor (206), the second motor (403), and the angular displacement sensor (209) are electrically connected via a PLC control circuit, and the torque sensor (208) and the spring tube pressure sensor (204) are electrically connected to a display (3).

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