A test device for starter and generator of vehicle

Abstract

The application discloses a kind of test device of vehicle starter and generator, including test bench, test bench is equipped with generator test station, starter test station, two stations include mounting plate, first sliding pair and second sliding pair are equipped between each mounting plate and test bench;The power drive mechanism of generator test station drives generator rotation by transmission mechanism, and the measured generator is connected with load mechanism;Starter test station includes drive battery and drag mechanism, and the measured starter drives drag mechanism after power on, and torque sensor is equipped between drag mechanism and the measured starter;It further includes control unit, multiple signal acquisition units, the control unit is respectively with each signal acquisition unit, the torque sensor signal connection.This test device of vehicle starter and generator has double-station integrated design, improves detection efficiency, and the left and right front and rear positions of the test piece can be adjusted, and the detection adaptability is strong.

Description

Technical Field

[0001] This invention relates to the field of motor testing equipment technology, specifically to a testing device for automotive starters and generators. Background Technology

[0002] Wind turbine generators need to maintain stable speed and safe operation over long periods under complex wind conditions. Blade overspeed, load impact, and brake failure are important factors that can lead to unit failures and safety accidents. Currently, the mainstream braking methods in the industry are divided into two main categories: pure mechanical friction braking and pure electromagnetic braking. Both types of solutions have obvious shortcomings and are difficult to adapt to the full operating conditions of the unit.

[0003] Pure mechanical friction braking relies on the frictional torque generated by the contact between the brake pads and the main shaft brake disc to complete the braking operation. It has strong static locking capability, meeting the requirements of long-term static operation conditions such as unit inspections and manual cranking. However, in high-frequency operating scenarios such as daily blade speed control and overspeed suppression, continuous contact between the friction pairs can lead to severe dry friction problems. This not only accelerates the wear of braking components and increases equipment maintenance costs, but the large amount of heat generated during friction can also easily cause thermal deformation of the main shaft brake disc and a decrease in braking performance. Furthermore, mechanical braking can only achieve on / off operation and cannot linearly adjust the braking torque. The deceleration process is prone to rigid impacts, and the additional load will act on the main shaft, gearbox, and other transmission structures, exacerbating component fatigue damage and affecting the overall service life of the machine.

[0004] Pure electromagnetic braking relies on the interaction of magnetic fields to generate damping torque, which is a non-contact speed regulation method and does not have the problem of mechanical wear. However, its braking torque is highly dependent on the rotational speed, and the braking torque decreases sharply in the low-speed range, making it impossible to provide stable and sufficient braking force at low speeds. This makes it difficult to achieve reliable stopping and zero-speed holding, and it is prone to the phenomenon of "low-speed slippage and unstable stopping". Furthermore, this type of structure cannot provide stable static locking force. Once the power is cut off, the damping effect disappears immediately, and it cannot achieve reliable locking of the blades for a long time. Therefore, it cannot be used in equipment maintenance, fixed parking and other working conditions.

[0005] In summary, the existing single braking structure cannot simultaneously meet the multiple requirements of low-wear speed regulation, low-speed stable braking and reliable mechanical locking, becoming a technical bottleneck restricting the operational stability and overall performance improvement of wind turbine units. Summary of the Invention

[0006] To overcome the above-mentioned shortcomings in the prior art, the present invention provides a test device for automotive starters and generators with a dual-station integrated design, which improves testing efficiency, allows for adjustment of the left, right, front, and back positions of the test piece, and has strong testing adaptability.

[0007] The technical solution of the present invention is, in one aspect, as follows: A testing device for automotive starters and generators includes a test bench, which has a generator testing station and a starter testing station. Both stations include mounting plates. A first sliding pair and a second sliding pair are provided between each mounting plate and the test bench. The first sliding pair enables the left-right position adjustment of the mounting plate, and the second sliding pair enables the front-back position adjustment of the mounting plate. The generator test station is equipped with a power drive mechanism, which drives the generator to rotate via a transmission mechanism. The generator under test is connected to a load mechanism. The starter test station includes a drive battery and a towing mechanism. After the starter under test is powered on, it drives the towing mechanism. A torque sensor is provided between the towing mechanism and the starter under test. It also includes a control unit and multiple signal acquisition units, each of which acquires electrical signals from the generator and starter under test. The control unit is connected to each of the signal acquisition units and the torque sensor.

[0008] Preferably, each of the first sliding pairs includes a first slide rail, and each of the mounting plates is slidably connected by a lower first slider and a first slide rail. A first adjusting member is provided between the first slider and the first slide rail, and the first adjusting member is used to adjust the left and right positions of the mounting plate.

[0009] In any of the above embodiments, it is preferred that each second sliding pair includes a second slide rail, each first slide rail has a connecting plate at its lower part, each connecting plate has a second slider at its lower part, the second slider and the second slide rail are slidably connected, and a second adjusting member is provided between the second slider and the second slide rail, the second adjusting member being used to adjust the front and rear position of the mounting plate.

[0010] In any of the above solutions, it is preferred that both the first adjusting member and the second adjusting member are adjusting screws.

[0011] In any of the above embodiments, it is preferred that a tension adjusting element is provided between the lead screw of the second adjusting element at the generator test station and the connecting plate, and the tension adjusting element keeps the transmission belt between the generator under test and the power drive mechanism taut.

[0012] In any of the above embodiments, it is preferred that the tension adjusting member includes a transmission block disposed at the lower part of the connecting plate, the lead screw of the second adjusting member passes through the through hole of the transmission block, the transmission block is floatingly connected to a pressure ring, an elastic member is provided between the pressure ring and the transmission block, the elastic member keeps the pressure ring in a state of clamping the transmission block, and the lead screw nut of the second adjusting member is clamped between the transmission block and the pressure ring; A locking structure is provided between the inner wall of the through hole and the outer wall of the nut, which allows the nut to slide along the axial direction of the through hole and can achieve axial locking. The surfaces where the nut and the pressure ring come into contact are smooth.

[0013] In any of the above embodiments, it is preferred that the pressure ring is floatingly connected to the transmission block via a guide rod, and one end of the guide rod is fixedly connected to the transmission block; The elastic element is a first spring, which is sleeved on the guide rod, and the two ends of the first spring abut against the pressure ring and the outer end of the guide rod, respectively.

[0014] In any of the above solutions, it is preferred that the locking structure is a spline structure or a convex-rib groove structure.

[0015] In any of the above embodiments, it is preferred that the surfaces of the nut and the pressure ring that come into contact are provided with a polytetrafluoroethylene coating.

[0016] In any of the above embodiments, it is preferred that both the generator test station and the starter test station are equipped with protective covers on their outer sides.

[0017] The testing apparatus for automotive starters and generators of this invention simultaneously sets up generator testing stations and starter testing stations on a test bench, enabling centralized testing of both types of devices and eliminating the cumbersome process of separate equipment operation. Each mounting plate is equipped with a first sliding pair and a second sliding pair, which respectively realize left-right and front-back position adjustment. Relying on the two-dimensional adjustment structure, different specifications of motors under test can be directly aligned and installed without the need for additional auxiliary tooling. The device is equipped with a signal acquisition unit and a torque sensor, which are uniformly connected to the control unit to fully realize the acquisition and management of various test data. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the test apparatus for a vehicle starter and generator of the present invention.

[0019] Figure 2 This is a schematic diagram of an embodiment of the connection plate and the second adjusting member cooperating in the generator test station of the test device for vehicle starters and generators of the present invention.

[0020] Figure 3 This is an assembly diagram of the transmission block, pressure ring, and adjusting screw of the second adjusting member at the lower part of the connecting plate of the test device for the vehicle starter and generator of the present invention.

[0021] Figure 4 for Figure 3 An exploded view of the structure shown.

[0022] Figure 5This is a schematic diagram of a preferred embodiment of the nut of the second adjusting member of the test device for a vehicle starter and generator according to the present invention.

[0023] Figure 6 This is a schematic diagram of the circuit connection of the test device for the vehicle starter and generator of the present invention.

[0024] Explanation of the labels in the diagram: 101-Power drive mechanism; 102-Mounting plate; 103-First slide rail; 104-Protective cover; 105-Test bench; 106-Second slide rail; 107-Connecting plate; 108-Drag mechanism; 109-Transmission block; 110-Pressure ring; 111-First spring; 112-Guide rod; 113-Second guide surface; 114-Second spring; 115-Slot; 116-Card block; 117-First guide surface. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Example 1: This embodiment discloses a testing device for automotive starters and generators, applicable to the performance calibration, testing, and maintenance of automotive starters and generators. It can perform multiple performance tests on two types of automotive motors on the same device. The entire device relies on a test bench 105 as its supporting structure. The test bench 105 is assembled from standard industrial profiles through welding, resulting in high overall structural strength and stable placement, meeting the requirements for long-term continuous testing of various types of motors under test.

[0028] like Figure 1As shown, the surface of the test bench 105 is divided into two independent test stations: a generator test station and a starter test station. The two test stations have similar structural layouts and are both equipped with mounting plates 102 for fixing the workpieces under test. Each mounting plate 102 is sequentially fitted with a first sliding pair and a second sliding pair between itself and the test bench frame. The first sliding pair is responsible for adjusting the position of the mounting plate 102 in the left-right direction, while the second sliding pair is responsible for adjusting the position of the mounting plate 102 in the front-back direction. Through bidirectional position adjustment, the assembly positions of the generator and starter under test can be flexibly changed to accommodate products of different sizes, ensuring effective transmission between the generator and the power drive mechanism 101, and effective engagement between the starter under test and the towing mechanism 108.

[0029] In this embodiment, as Figure 1 As shown, the first sliding pair at each workstation includes a first slide rail 103 arranged in the left-right direction. A first slider is fixedly installed on the bottom of each mounting plate 102. The mounting plate 102 forms a sliding connection with the first slide rail 103 through the first slider at the bottom, and can slide smoothly along the extension direction of the first slide rail 103. A first adjusting member is assembled between the first slider and the first slide rail 103. The mounting plate 102 can be driven to complete the left-right movement and positioning by relying on the first adjusting member.

[0030] The second sliding pair includes a second slide rail 106 arranged in the front-back direction. The bottom of the aforementioned first slide rail 103 is fastened to the upper part of the connecting plate 107. A second slider is fixedly provided at the bottom of each connecting plate 107. The second slider slides in slidable engagement with the second slide rail 106. A second adjusting member is assembled between the second slider and the second slide rail 106. With the help of the second adjusting member, the connecting plate 107, the first slide rail 103 and the mounting plate 102 above can be driven to move in the front-back direction as a whole to complete the front-back position adjustment.

[0031] In this embodiment, as Figure 1 As shown, both the first and second adjusting components use adjusting screws. The screw adjustment method ensures smooth operation and high displacement control accuracy. Furthermore, the screw itself has a mechanical self-locking characteristic, which can automatically lock the position after the position adjustment is completed, effectively preventing the mounting plate 102 from shifting during equipment operation and ensuring that the test state remains stable.

[0032] An optional form of the specific assembly structure for each adjusting lead screw is as follows: for the adjusting lead screw corresponding to the first adjusting member, at least one end of its screw rod is rotatably connected to the upper part of the connecting plate 107. This connection structure can ensure the screw rod rotates freely in the circumferential direction, while restricting the axial play of the screw rod itself along the connecting plate 107. The nut matched with the screw rod is assembled at the lower position of the mounting plate 102. When the screw rod is turned, the nut and the connected mounting plate 102 can be driven to perform linear displacement along the first slide rail 103 by means of thread transmission, so as to realize the adjustment of the left and right positions of the mounting plate 102. With a similar structure, the screw rod of the adjusting lead screw corresponding to the second adjusting member also adopts the assembly form of rotary connection and is connected with the test bench 105. The matching nut is arranged at the lower part of the connecting plate 107. When the screw rod is turned, the nut and the connected connecting plate 107 can be driven to adjust the position in the front-rear direction by means of thread transmission, and further the position of the mounting plate 102 in the front-rear direction can be adjusted.

[0033] As Figure 1 shown, a power drive mechanism 101 is fixedly installed on the generator test station. The power drive mechanism 101 is composed of a drive motor. When the drive motor operates, it drives the tested generator to rotate synchronously through a transmission mechanism. In this embodiment, a transmission belt structure is preferably selected as the transmission mechanism. The circuit end of the tested generator is electrically connected with a load mechanism, which can simulate the actual electrical load of a vehicle and cooperate with the rotation speed change of the drive motor to simulate the power generation state of the generator under different working conditions.

[0034] As Figure 1 shown, the starter test station is equipped with a drive battery and a dragging mechanism 108. The drive battery provides working power for the tested starter. After the tested starter is energized and started, it outputs torque to further drive the dragging mechanism 108 to operate. A torque sensor is assembled between the dragging mechanism 108 and the power output end of the tested starter. The torque sensor can collect the output torque parameters during the operation of the starter in real time, providing data support for performance judgment.

[0035] As Figure 6 shown, the present device is further provided with a control unit and a plurality of signal acquisition units. The control unit can use a PLC or a microcontroller to construct a control core, which is responsible for coordinating the overall operation logic of the equipment, receiving acquired signals and issuing control instructions. Each signal acquisition unit is correspondingly connected to the tested generator and the tested starter respectively. The signal acquisition units specifically include a voltage sensor, a current sensor and a temperature sensor, which can continuously collect a plurality of electrical parameters and state parameters such as the working voltage, working current and body temperature of the motors under test during operation. All the signal acquisition units and the torque sensor are in signal connection with the control unit to realize real-time data transmission and aggregation. The present device can be additionally provided with a display unit for displaying various detection data in the test process in real time, so that operators can read the monitoring results intuitively.

[0036] In actual testing, the generator performance is tested first. The operator sends operation commands to the power drive mechanism 101 via the control unit, adjusting the drive motor speed as needed to simulate different vehicle driving conditions. The signal acquisition unit collects the voltage and current values ​​of the generator's output circuit throughout the process, while simultaneously monitoring the generator's operating temperature. The operator combines these parameters across different speed ranges to comprehensively determine whether the generator's operating condition is normal. After completing the generator test, the process switches to the starter motor test. The drive battery powers the starter motor, which then drives the towing mechanism 108. The torque sensor collects the starter motor's output torque in real time, and the signal acquisition unit simultaneously collects the starter motor's operating voltage, current, and body temperature. All data is transmitted to the control unit and displayed on the screen. Based on parameters such as torque, voltage, current, and temperature, the operator comprehensively assesses the starter motor's operating status. The entire testing process is simple to operate, provides comprehensive data, and efficiently completes performance testing of vehicle starters and generators.

[0037] Example 2: Based on Example 1, such as Figure 1-4 As shown, to further ensure effective transmission between the power drive mechanism 101 and the generator, a tension adjusting component is added between the second adjusting screw and the connecting plate 107 at the generator test station. Since the generator test station relies on a transmission belt to transmit power, a loose transmission belt is prone to slippage, directly affecting the accuracy of measured data such as speed, voltage, and current. Therefore, a tension adjusting component is needed to maintain the tension of the transmission belt. However, the starter test station uses gear meshing transmission, and meshing stability can be ensured simply by fine-tuning the position of the second adjusting screw at this station, eliminating the need for this additional tension adjusting structure.

[0038] In this embodiment, the tension adjusting component includes a transmission block 109 disposed at the lower part of the connecting plate 107. The screw of the adjusting screw of the second adjusting component at this station passes through the through hole of the transmission block 109. A pressure ring 110 is floatingly connected to the transmission block 109. An elastic element is provided between the pressure ring 110 and the transmission block 109. The elastic element keeps the pressure ring 110 clamped to the transmission block 109. The nut of the second adjusting screw is clamped between the transmission block 109 and the pressure ring 110. A locking structure is provided between the inner wall of the through hole and the outer wall of the nut. The locking structure allows the nut to slide along the axial direction of the through hole and can achieve axial locking. The surfaces of the nut and the pressure ring 110 in contact are smooth surfaces.

[0039] In this embodiment, the floating connection between the pressure ring 110 and the transmission block 109 can be optionally implemented as follows: the transmission block 109 is connected to the pressure ring 110 via a guide rod 112, one end of the guide rod 112 is fixedly connected to the transmission block 109, and a first spring 111 is fitted onto the outside of the guide rod 112 as an elastic element, with both ends of the first spring 111 abutting against the outer ends of the pressure ring 110 and the guide rod 112, respectively. This elastic element continuously outputs elastic pushing force, which is the main structure providing stable tension for the transmission belt. Throughout the entire operation of the equipment, the pressure ring 110 is pressed against the transmission block 109 by its own elastic force, and the nut of the second adjusting screw is clamped between the transmission block 109 and the pressure ring 110.

[0040] The inner wall of the through hole of the transmission block 109 and the outer wall of the nut are provided with a locking structure that cooperates with each other. In this embodiment, the locking structure can be a spline structure or a convex groove structure. When the two are engaged, they can form a circumferential limit on the nut, preventing the nut from rotating with the screw, while allowing the nut to slide axially along the through hole.

[0041] In this embodiment, to further reduce the frictional resistance of the contact surface, a polytetrafluoroethylene coating is provided on the surface where the nut and the pressure ring 110 contact, so that the nut can slide smoothly relative to the pressure ring 110 after it is released from the locking structure.

[0042] It should be noted that, in addition to coating the contacting surfaces with a polytetrafluoroethylene coating, another way to reduce the resistance between the nut and the pressure ring 110 is to install a thrust bearing on the contacting end face of the nut and the pressure ring 110. To further ensure that the nut can generate friction with the pressure ring 110 and remain stationary with the second adjusting screw after the ridge at the nut disengages from the transmission block 109, the mating teeth between the second adjusting screw and the nut at that location adopt a rectangular tooth structure with a large tooth height.

[0043] When the screw is rotated to tension the drive belt, the screw and nut rotate relative to each other due to the threaded transmission. The nut moves, squeezing the pressure ring 110. The pressure ring 110, through the elastic element, drives the transmission block 109 to move, which in turn moves the connecting plate 107. As the tension of the drive belt gradually increases, a reverse pull acts on the entire structure, and the pressure ring 110 experiences a reaction force, further compressing the elastic element. When the tension of the drive belt reaches the set value, the connecting plate 107 and the mounting plate 102 are restricted by the tension and no longer displace. Continuing to rotate the screw forward, the nut moves axially along the through hole under the threaded thrust, completely disengaging from the locking structure formed by the spline or convex groove, and the nut loses its circumferential constraint. At this point, relying on the low friction characteristics of the contact surface, the screw will slip circumferentially with the nut when rotating, causing the screw to spin freely and no longer push the structure forward, thus preventing the drive belt from being over-tensioned. Throughout the process, the elastic element remains compressed, continuously outputting elastic force to maintain a constant tension in the transmission belt, effectively preventing the transmission belt from becoming loose or slipping during the test.

[0044] When it is necessary to relieve the tension on the transmission belt, the screw is rotated in the opposite direction. The nut begins to retract axially under the action of the thread. At this time, the nut is still in the state of being disengaged from the locking structure, and there is still relative rotation between the screw and the nut. As the nut continues to retract, the splines or protrusions on the outer wall of the nut gradually align with the corresponding structure on the inner wall of the through hole. With the help of the clamping force of the first spring 111 and the guiding effect of the structure itself, the nut is smoothly embedded into the locking structure, and the circumferential limiting function is reactivated. After the locking structure is engaged, the circumferential rotation of the nut is restricted, and the rotational force of the screw can be stably transmitted to the nut. The two no longer slip, and the nut moves axially backward synchronously with the screw. During this process, the compression of the first spring 111 gradually decreases, the tension force acting on the transmission belt continues to decrease, and the connecting plate 107 and the mounting plate 102 are reset accordingly, finally completely releasing the tension state, which facilitates the disassembly and assembly of the workpiece being measured.

[0045] In this embodiment, as Figure 5 As shown, when it is necessary to unload the drive belt, in order to ensure that the protrusion at the nut can smoothly engage with the groove at the drive block 109, a groove 115 is provided at the end of the protrusion facing the drive block 109. A locking block 116 is rotatably connected to the groove 115. A second spring 114 is provided between the bottom of the locking block 116 and the groove 115. In its natural state, the locking block 116 can protrude from the end face of the protrusion under the action of the second spring 114. The surface of the locking block 116 facing the drive block 109 is provided with a first guide surface 117 and a second guide surface 113. The slope of the second guide surface 113 relative to the plane perpendicular to the axis where the nut is located is much greater than the slope of the first guide surface 117 relative to the plane perpendicular to the axis where the nut is located. When the drive belt is tensioned, after the protrusion at the nut disengages from the groove at the drive block 109, the edge of the groove will squeeze the first guide surface, thus forcing the locking block 116 to retract into the groove 115. When it is necessary to unload the transmission belt, as the protrusion and the groove are aligned, the locking block 116 pops out from the locking groove 115. The second guide 113 surface of the locking block 116 contacts the side wall of the groove and is blocked by the side wall of the groove, causing the nut and the second adjusting screw to rotate relative to each other, and causing the protrusion at the nut to be locked into the groove at the transmission block.

[0046] Example 3: Based on Example 1 or 2, such as Figure 1 As shown in this embodiment, both the generator test station and the starter test station are equipped with protective covers 104 on their outer sides. Each protective cover 104 is hinged to the test bench. When opened, it is convenient to install the generator and starter to be tested at the corresponding mounting plate 102, and to adjust the position of the generator and starter to be tested. When closed, it can provide physical protection for the test pieces and auxiliary mechanisms at each station.

[0047] The primary function of the protective cover 104 is safety protection. It completely isolates high-speed rotating transmission belts, gears, and other moving parts, preventing operators from accidentally touching these components and effectively mitigating safety risks. Simultaneously, it also prevents external objects from accidentally impacting the transmission and adjustment structures, providing physical protection for the equipment components.

[0048] The above-described embodiments are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A test apparatus for vehicle starters and generators, comprising a test bench (105), characterized in that: The test bench (105) is equipped with a generator test station and a starter test station. Both stations include a mounting plate (102). A first sliding pair and a second sliding pair are provided between each mounting plate (102) and the test bench (105). The first sliding pair realizes the left and right position adjustment of the mounting plate (102), and the second sliding pair realizes the front and rear position adjustment of the mounting plate (102). The generator test station is equipped with a power drive mechanism (101), which drives the generator to rotate via a transmission mechanism. The generator under test is connected to a load mechanism. The starter test station includes a drive battery and a towing mechanism (108). After the starter under test is powered on, it drives the towing mechanism (108). A torque sensor is provided between the towing mechanism (108) and the starter under test. It also includes a control unit and multiple signal acquisition units, each of which acquires electrical signals from the generator and starter under test. The control unit is connected to each of the signal acquisition units and the torque sensor.

2. The test apparatus for vehicle starters and generators according to claim 1, characterized in that, Each of the first sliding pairs includes a first slide rail (103), and each mounting plate (102) is slidably connected by a first slider and a first slide rail (103) at the bottom. A first adjusting member is provided between the first slider and the first slide rail (103), and the first adjusting member is used to adjust the left and right positions of the mounting plate (102).

3. The test apparatus for vehicle starters and generators according to claim 2, characterized in that, Each of the second sliding pairs includes a second slide rail (106), and each of the first slide rails (103) has a connecting plate (107) at its lower part. Each of the connecting plates (107) has a second slider at its lower part. The second slider and the second slide rail (106) are slidably connected. A second adjusting member is provided between the second slider and the second slide rail (106). The second adjusting member is used to adjust the front and rear positions of the mounting plate (102).

4. The test apparatus for vehicle starters and generators according to claim 3, characterized in that, Both the first adjusting component and the second adjusting component are adjusting lead screws.

5. The test apparatus for vehicle starters and generators according to claim 4, characterized in that, A tension adjusting component is provided between the lead screw and the connecting plate (107) of the second adjusting component at the generator test station. The tension adjusting component keeps the transmission belt between the generator under test and the power drive mechanism (101) in a taut state.

6. The test apparatus for vehicle starters and generators according to claim 5, characterized in that, The tension adjusting component includes a transmission block (109) disposed at the lower part of the connecting plate (107). The lead screw of the second adjusting component passes through the through hole of the transmission block (109). The transmission block (109) is floatingly connected to a pressure ring (110). An elastic element is provided between the pressure ring (110) and the transmission block (109). The elastic element keeps the pressure ring (110) clamped to the transmission block (109). The lead screw nut of the second adjusting component is clamped between the transmission block (109) and the pressure ring (110). A locking structure is provided between the inner wall of the through hole and the outer wall of the nut, which allows the nut to slide along the axial direction of the through hole and can achieve axial locking. The surfaces in contact between the nut and the pressure ring (110) are smooth surfaces.

7. The test apparatus for vehicle starters and generators according to claim 6, characterized in that, The pressure ring (110) is floatingly connected to the transmission block (109) via the guide rod (112), and one end of the guide rod (112) is fixedly connected to the transmission block (109); The elastic element is a first spring (111), which is sleeved on the guide rod (112). The two ends of the first spring (111) abut against the outer ends of the pressure ring (110) and the guide rod (112), respectively.

8. The test apparatus for vehicle starters and generators according to claim 6, characterized in that, The locking structure is a spline structure or a convex-groove structure.

9. The test apparatus for vehicle starters and generators according to claim 6, characterized in that, The surfaces of the nut and the pressure ring (110) that come into contact are coated with polytetrafluoroethylene.

10. The test apparatus for vehicle starters and generators according to claim 1, characterized in that, Both the generator test station and the starter test station are equipped with protective covers (104) on their outer sides.

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