A gearbox height detection fixture

Abstract

This invention relates to the field of gearbox dimension inspection, specifically to a gearbox height inspection fixture, comprising an inspection platform and a controller. The inspection platform is used to mount the gearbox, and a vertical plate is provided on one side of the inspection platform. A cavity is formed within the vertical plate, and a telescopic plate slides vertically onto the inner sidewall of the cavity. A clamping plate for holding and fixing the upper end of the gearbox is installed on the top of the telescopic plate. A retaining assembly is provided on the sidewall of the vertical plate. A clamping assembly for holding the input or output shaft of the gearbox is provided between the top of the inspection platform and the bottom of the clamping plate. A first measuring assembly is provided on the vertical plate, and a second measuring assembly is provided on the clamping assembly. Using the technical solution of this invention, the height and other parameters of the gearbox can be inspected conveniently, accurately, and efficiently.

Description

Technical Field

[0001] This invention relates to the field of gearbox size inspection, and more specifically to a gearbox height inspection fixture. Background Technology

[0002] A gearbox is a mechanical transmission device used to regulate speed, transmit power, and change the direction of torque. It mainly consists of gears, shafts, bearings, and a housing. It achieves speed change between the input and output shafts through different gear combinations and is widely used in industrial machinery, automobiles, wind power, shipbuilding, and aerospace. Gearboxes come in various types, including parallel shaft gearboxes, planetary gearboxes, bevel gearboxes, and worm gearboxes, each suitable for different loads, precision requirements, and space constraints. To ensure long-term stable operation, gearboxes require regular maintenance, such as checking lubrication, sealing, and vibration. With technological advancements, modern gearboxes are developing towards lightweight, intelligent, and high-efficiency designs. Some high-end models also integrate sensors for real-time status monitoring, further improving reliability and energy efficiency.

[0003] After the gearbox is assembled, its dimensions usually need to be measured and inspected. Key inspection parameters include the overall height, the distance between the upper and lower endpoints of the output shaft distance, and the distance between the upper and lower endpoints of the input shaft distance. Traditional techniques use rulers for measurement, while some manufacturers with high automation or precision requirements use automated measuring equipment. These automated measuring devices have high requirements for the gearbox's position and fixation on the inspection table. If the position or fixation is not good, the gearbox may move or deflect during measurement, resulting in decreased accuracy of the measured parameters and easy wear on the gearbox surface. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a gearbox height detection fixture, which is used to conveniently, accurately, and efficiently detect parameters such as gearbox height.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a gearbox height detection fixture, comprising a detection platform and a controller;

[0006] The testing platform is used to place the gearbox. A vertical plate is provided on one side of the testing platform. A cavity is opened in the vertical plate. A telescopic plate is vertically slidably fitted in the cavity. A clamping plate is installed on the top of the telescopic plate. The clamping plate is parallel to the testing platform.

[0007] The vertical plate is provided with retaining components on both sides. The retaining components on both sides of the vertical plate are used to lock the clamping plate when it contacts the upper end of the gearbox.

[0008] A clamping assembly for clamping the input or output shaft of the gearbox is provided between the top of the testing platform and the bottom of the clamping plate; a first measuring assembly for measuring the height of the gearbox is provided on the vertical plate; a second measuring assembly for measuring the distance between the output or input shaft of the gearbox and the highest and lowest points of the gearbox is provided on the clamping assembly; and a controller is used to acquire the measurement data of the first and second measuring assemblies.

[0009] The above approach has the following beneficial effects:

[0010] 1. In this solution, by setting a vertically sliding telescopic plate and a clamping plate, it can adapt to gearboxes of different heights. After the clamping plate is fixed in position by using the holding component, the height of the upper end of the gearbox can be accurately measured, providing a benchmark for subsequent testing.

[0011] 2. In this solution, the clamping component between the top of the testing platform and the bottom of the clamping plate can accurately position and clamp the gearbox input shaft or output shaft, solving the problem of difficulty in aligning the highest point in traditional measurements and improving the accuracy of the measurement.

[0012] 3. In this solution, the combined use of the first and second measuring components can simultaneously obtain the height of the upper end of the gearbox and the height of the output shaft or input shaft relative to the lower and upper ends of the gearbox, enabling the measurement of multiple dimensional data and providing a more comprehensive and accurate reference for the installation and commissioning of the gearbox.

[0013] Furthermore, the bottom wall of the testing platform is provided with a driving assembly for driving the clamping plate to slide vertically; the driving assembly includes a suction pipe disposed on the side wall of the vertical plate, the suction pipe being connected to the cavity, and a pump assembly being connected to the suction pipe, and a controller being used to control the operation of the pump assembly.

[0014] Beneficial effects: The drive assembly consisting of the pump assembly and the suction pipe enables the automatic vertical sliding of the clamping plate without the need for manual adjustment. This not only saves labor costs, but also allows for precise control of the sliding process through the controller, making the clamping plate move more smoothly towards or away from the upper end of the gearbox, thus improving the convenience and stability of operation.

[0015] Furthermore, the component includes piston chambers symmetrically opened on both sides of the vertical plate and drive boxes corresponding to the piston chambers; pistons are slidably fitted in each piston chamber, and a first rack is fixedly connected to the top of each piston, with the first rack extending into the drive box adjacent to it.

[0016] A worm gear is rotatably fitted on the inner side wall of the drive box. The end of the worm gear away from the side wall of the drive box is coaxially and fixedly connected to a first gear. The first gear meshes with the first rack adjacent to it. The end of the first rack away from the piston is fixedly connected to a tension spring. The end of the tension spring away from the first rack is fixedly connected to the top wall of the drive box.

[0017] Each worm gear is meshed with a worm wheel, and each worm wheel rotates in cooperation with the inner side wall of its adjacent drive box. Each worm wheel is coaxially fixedly connected with a second gear, and each second gear is meshed with a second rack. Each second rack has a push rod fixedly connected to one end, and the end of the push rod away from the second rack passes through the side wall of its adjacent drive box and is fixedly connected to a clamping block.

[0018] Beneficial effects: Through the linkage of components such as piston, rack, worm, and worm wheel, this holding assembly can stably lock the position of the clamping plate when the clamping plate holds the upper end of the gearbox by utilizing the self-locking characteristics of the mechanical structure. This prevents the clamping plate from shifting due to external forces or its own weight during the measurement process, ensuring the stability of the measurement reference and thus improving the overall measurement accuracy.

[0019] Furthermore, the first measuring component includes a first reading head fixedly connected to one side wall of the telescopic plate, and a first grating ruler fixedly connected to one side wall of the vertical plate. The first reading head and the first grating ruler are slidably engaged. The controller is used to receive displacement data of the first grating ruler sent by the reading head, and to identify the telescopic distance of the telescopic plate.

[0020] Beneficial effects: The grating ruler has extremely high measurement accuracy. The cooperation between the first reading head and the first grating ruler can accurately capture the telescopic distance of the telescopic plate, thereby accurately determining the height of the upper end of the gearbox and avoiding errors that may occur with manual reading.

[0021] Furthermore, the clamping assembly includes a telescopic cylinder fixedly connected to the bottom of the clamping plate and the top of the detection platform. A piston block is slidably fitted inside the telescopic cylinder, and a telescopic block is fixedly connected to the piston block. Retaining assemblies are also provided on both sides of the telescopic cylinder. The retaining assemblies on both sides of the telescopic cylinder are used to lock the telescopic block when it contacts the output shaft or input shaft of the gearbox. An air guide pipe is connected to the upper part of the telescopic cylinder, and the end of the air guide pipe away from the telescopic cylinder is connected to the cavity in the vertical plate.

[0022] Beneficial effects: The connection between the air duct and the vertical plate can drive the telescopic block to move by means of the air pressure change in the vertical plate, so as to realize the automatic clamping of the upper end position of the input shaft or output shaft. In addition, with the help of the holding component to fix the position, the accuracy and stability of the positioning of the upper end of the shaft component are further ensured.

[0023] Furthermore, the second measuring component includes a second grating ruler fixedly connected to the side wall of the telescopic cylinder, and a second reading head fixedly connected to the side wall of the telescopic block. The controller is used to receive displacement data of the second grating ruler sent by the second reading head, and to identify the displacement of the telescopic block during telescopic movement.

[0024] Beneficial effects: The combination of the second grating ruler and the second reading head can accurately measure the telescopic displacement of the telescopic block, thereby accurately obtaining the height of the output shaft or input shaft relative to the lower and upper ends of the gearbox.

[0025] Furthermore, it also includes an auxiliary fixing component for fixing the gearbox. The auxiliary fixing component includes several negative pressure holes opened on the top of the testing platform, and the negative pressure holes are all connected to the internal cavity of the vertical plate.

[0026] Beneficial effects: The auxiliary fixing component uses the suction force generated by air pressure through the negative pressure hole to fix the gearbox on the testing platform, preventing the gearbox from shifting due to external impact or its own shaking during the measurement process.

[0027] Furthermore, the testing platform is equipped with chutes located on both sides of the testing platform. Sliders are slidably fitted inside the chutes, and cleaning nozzles are installed on the sliders. The cleaning nozzles are connected to the output port of the pump assembly. Each chute is equipped with a drive component for driving the slider to slide along the length of the chutes.

[0028] Beneficial effects: The slider can slide along the groove under the drive of the drive component, which drives the cleaning nozzle to blow air to clean the top of the detection platform, remove dust, debris and other impurities from the surface, and prevent these impurities from affecting the flatness of the gearbox installation.

[0029] Furthermore, pressure sensors are fixedly connected to the end of the clamping block away from the push rod. The controller is used to output the displacement data of the first grating ruler and the displacement data of the second grating ruler when the pressure data collected by each pressure sensor exceeds the threshold and is stable.

[0030] Beneficial effects: The pressure sensor can monitor the clamping force of the clamping block on the gearbox or shaft components in real time. When the pressure data reaches the threshold and is stable, it indicates that the clamping is in place and the state is stable. At this time, the controller outputs measurement data, which can avoid measurement errors caused by loose or excessive clamping.

[0031] Furthermore, the testing platform is equipped with a level, which is an electronic level. The controller is used to issue an alarm when the electronic level detects that the testing platform is tilted.

[0032] Beneficial effects: The electronic level can monitor the level of the testing platform in real time. If the testing platform tilts, the controller will issue an alarm in time to remind the operator to make adjustments, so as to avoid deviation of the entire measurement benchmark due to the tilt of the testing platform.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is an isometric view of the gearbox height detection fixture of the present invention.

[0035] Figure 2 for Figure 1 Enlarged view of section A.

[0036] Figure 3 This is a rear axonometric view of the gearbox height detection fixture of the present invention.

[0037] Figure 4 This is a front sectional view of the vertical plate in the gearbox height detection fixture of the present invention.

[0038] Figure 5 for Figure 4 Enlarged view of section B.

[0039] Figure 6 This is a front sectional view of the telescopic cylinder in the gearbox height detection fixture of the present invention.

[0040] The reference numerals in the accompanying drawings of the instruction manual include: 1. Detection platform; 2. Vertical plate; 3. Telescopic plate; 4. Clamping plate; 5. Gearbox; 6. Electronic level; 7. Suction tube; 8. Pump assembly; 9. Piston chamber; 10. Drive box; 11. Cleaning nozzle; 12. First rack; 13. Worm; 14. First gear; 15. Tension spring; 16. Worm wheel; 17. Second gear; 18. Second rack; 19. Push rod; 20. Clamping block; 21. First reading head; 22. First grating ruler; 23. Telescopic cylinder; 24. Telescopic block; 25. Piston block; 26. Air guide tube; 27. Second grating ruler; 28. Second reading head. Detailed Implementation

[0041] The following detailed description illustrates the specific implementation method:

[0042] Example 1: As Figure 1 As shown: A gearbox height detection fixture includes a detection platform 1 and a controller.

[0043] The testing platform 1 is used to install the gearbox 5. A vertical plate 2 is provided on one side of the testing platform 1. A cavity is opened in the vertical plate 2. A telescopic plate 3 is vertically slidably fitted on the inner side wall of the cavity. A clamping plate 4 for clamping and fixing the upper end of the gearbox 5 is installed on the top of the telescopic plate 3.

[0044] The vertical plate 2 is provided with retaining components on both sides. The retaining components on both sides of the vertical plate 2 are used to lock the clamping plate 4 when it comes into contact with the upper end of the gearbox 5.

[0045] A clamping assembly for clamping the input or output shaft of the gearbox 5 is provided between the top of the testing platform 1 and the bottom of the clamping plate 4; a first measuring assembly for measuring the height of the upper end of the gearbox 5 is provided on the vertical plate 2; and a second measuring assembly for measuring the distance between the output or input shaft of the gearbox 5 and the highest and lowest points of the gearbox 5 is provided on the clamping assembly.

[0046] The bottom wall of the testing platform 1 is equipped with a drive assembly for driving the clamping plate 4 to slide vertically.

[0047] like Figure 3 As shown, specifically, the drive assembly includes a suction pipe 7 connected to the side wall of the vertical plate 2, and a pump assembly 8 installed on the inner bottom wall of the detection platform 1. The controller is used to control the operation of the pump assembly 8. The inlet of the pump assembly 8 is connected to the suction pipe 7. In this embodiment, the pump assembly 8 is a dual-purpose vacuum pump that can generate negative pressure and positive pressure.

[0048] When the pump assembly 8 is running, its inlet generates negative pressure, which in turn generates negative pressure in the cavity inside the vertical plate 2 through the suction pipe 7. At this time, the telescopic plate 3 can move downward under the action of negative pressure, which can drive the clamping plate 4 to move downward and clamp the upper end of the gearbox 5. At the same time, the clamping plate 4 clamps the gearbox 5 so that the gearbox 5 can be fixed when measuring the height of the upper end, avoiding its shaking and affecting the measurement accuracy.

[0049] like Figure 4 and Figure 5 As shown, specifically, the retaining components on both sides of the vertical plate 2 include piston chambers 9 symmetrically opened in the side walls of the vertical plate 2, and drive boxes 10 symmetrically installed on both sides of the top of the vertical plate 2; the piston chambers 9 communicate with the internal cavity of the vertical plate 2, and the communication position is located at the bottom of the internal cavity of the vertical plate 2. A piston is slidably fitted in each piston chamber 9, and a first rack 12 is fixedly connected to the top of each piston by screws. The first rack 12 extends into the drive box 10 adjacent to it.

[0050] Worms 13 are rotatably fitted on the inner sidewall of the drive box 10. The worms 13 are rotatably fitted to the inner sidewall of the drive box 10 via bearings. The inner ring of the bearing is interference-fitted with the worm 13, and the outer ring of the bearing is fixedly welded to the inner sidewall of the drive box 10. The end of the worm 13 away from the sidewall of the drive box 10 is coaxially fixedly connected to a first gear 14 by screws. The first gear 14 meshes with the adjacent first rack 12. The end of the first rack 12 away from the piston is fixedly connected to a tension spring 15 by screws. The end of the tension spring 15 away from the first rack 12 is fixedly connected to the inner top wall of the drive box 10 by screws.

[0051] Worm gears 16 are meshed on each worm gear 13. The worm gears 16 are rotatably engaged with the inner wall of the drive box 10 via a rotating shaft. The two ends of the rotating shaft are connected to the two inner walls of the drive box 10 respectively via bearings. The worm gears 16 and the rotating shaft are interference-fitted to ensure the meshing accuracy and transmission stability of the worm gears 13 and worm gears 16. A second gear 17 is coaxially fixedly connected to each worm gear 16 by screws. A second rack 18 is meshed on each second gear 17. A push rod 19 is integrally formed at one end of each second rack 18. The end of the push rod 19 away from the second rack 18 passes through the adjacent side wall of the drive box 10 and is fixedly connected to a clamping block 20 by screws (in this embodiment, the clamping block 20 is made of a high friction coefficient material).

[0052] Combination Figure 4 As shown, since the negative pressure generated by the pump assembly 8 is constant, when the clamping plate 4 clamps the upper end of the gearbox 5, the telescopic plate 3 stops moving downward. At this time, the negative pressure in the vertical plate 2 increases accordingly. Since the piston chamber 9 is connected to the vertical plate 2, the negative pressure in the piston chamber 9 increases. At this time, the piston will not move downward due to the action of the tension spring 15 above. When the force of the negative pressure in the piston chamber 9 that drives the piston is greater than the tension of the tension spring 15, the piston will move downward.

[0053] Combination Figure 5 As shown, when the piston moves downward, it drives the first rack 12 downward, which in turn drives the first gear 14 to rotate the worm 13. The worm 13 then drives the worm wheel 16 to rotate clockwise, which in turn drives the second gear 17 to rotate clockwise. The clockwise rotation of the second gear 17 drives the second rack 18 to move to the right, which in turn drives the push rod 19 to move the clamping block 20, thus... Figure 4 The telescopic plate 3 is clamped. Since the clamping block 20 is made of a material with a high coefficient of friction, it will lock the telescopic plate 3. At the same time, due to the self-locking property of the worm gear 16 and worm 13, the second rack 18 will not drive the second gear 17 to rotate. This restricts the telescopic plate 3 from continuing to move, thereby avoiding excessive clamping force of the clamping plate 4 on the gearbox 5 and causing damage to the gearbox 5. At the same time, it can maintain a certain force to fix the gearbox 5, which is convenient for subsequent detection of the height of the gearbox 5.

[0054] like Figure 3 As shown, specifically, the first measuring component includes a first reading head 21 fixedly connected to one side wall of the telescopic plate 3 by screws, and a first grating ruler 22 fixedly connected to one side wall of the vertical plate 2 by screws. The first reading head 21 and the first grating ruler 22 are slidably engaged. The controller is used to receive the displacement data of the first grating ruler 22 sent by the reading head, and to identify the telescopic distance of the telescopic plate 3.

[0055] In this embodiment, the first grating ruler 22 is a commonly used measurement device for measuring errors and accuracy in the prior art. Compared with traditional laser rangefinders, it has higher accuracy, with an accuracy of 0.1 micrometers. Its detection principle is that the photoelectric receiving device in the reading head captures the movement signal of the moiré fringes generated on the grating ruler when the reading head moves, and converts it into an electrical signal and transmits it to the controller. By processing and calculating the electrical signal, the controller can accurately determine the displacement of the indicator grating relative to the scale grating, and thus determine the moving distance of the reading head. This embodiment will not elaborate further.

[0056] Combination Figure 3As shown, the controller presets the highest position of the clamping plate 4 as zero. When the clamping plate 4 is at its highest position, the initial position of the first reading head 21 on the first grating ruler 22 is zero. When the telescopic plate 3 moves downward, it drives the first reading head 21 to slide downward on the first grating ruler 22. When the clamping plate 4 clamps the upper end of the gearbox 5, the first reading head 21 stops moving and reads the distance data of the downward displacement of the first reading head 21 on the first grating ruler 22. The controller obtains the height data of the upper end of the gearbox 5 by subtracting the distance data of the downward displacement of the first reading head 21 on the first grating ruler 22 from the height data of the highest position of the clamping plate 4.

[0057] like Figure 1 and Figure 6 As shown, specifically, the clamping assembly includes telescopic cylinders 23 that are bolted to the bottom of the clamping plate 4 and the top of the detection platform 1. Each telescopic cylinder 23 has a telescopic block 24 that is slidably fitted inside it. One end of each telescopic block 24 passes through the corresponding telescopic cylinder 23 and is bolted to a piston block 25. Each piston block 25 is slidably fitted to the inner wall of the telescopic cylinder 23.

[0058] Both sides of the telescopic cylinder 23 are also provided with retaining components, which are used to lock the telescopic block 24 when it contacts the output shaft or input shaft of the gearbox 5. The difference is that the piston chambers 9 of the retaining components on both sides of the telescopic cylinder 23 are symmetrically opened in the side wall of the telescopic cylinder 23, and the drive box 10 is symmetrically installed on both sides of the top of the telescopic cylinder 23. The piston chambers 9 are connected to the inside of the telescopic cylinder 23, and the connection position is located on the upper side wall of the telescopic cylinder 23. In this embodiment, the internal cavity of the vertical plate 2 and the inside of the telescopic cylinder 23 are connected through the air guide pipe 26.

[0059] Since the end of the air duct 26 furthest from the telescopic cylinder 23 is connected to the vertical plate 2, when the vertical plate 2 generates negative pressure, the telescopic cylinder 23 also generates negative pressure. When the telescopic plate 3 moves downward, due to its own weight, the telescopic plate 3 will move first. Combined with... Figure 6 As shown, when the clamping plate 4 clamps the upper end of the gearbox 5, the negative pressure inside the vertical plate 2 increases, and the negative pressure inside the telescopic cylinder 23 also increases accordingly. At this time, the piston block 25 will move upward, thereby driving... Figure 1 The telescopic block 24 below the output or input shaft of the gearbox 5 moves upward, causing the telescopic block 24 above the output or input shaft of the gearbox 5 to move downward, clamping the highest and lowest points of the output shaft of the gearbox 5. This also serves to stabilize and fix the output or input shaft of the gearbox 5 during measurement, facilitating subsequent testing operations. Meanwhile, the retaining component on the telescopic cylinder 23 operates on the same principle as the retaining component on the vertical plate 2, and firmly clamps the telescopic block 24, preventing excessive clamping force from damaging the output or input shaft of the gearbox 5.

[0060] like Figure 2 As shown, specifically, the second measuring component includes a second grating ruler 27, which is fixedly connected to the side wall of the telescopic cylinder 23 by screws, and a second reading head 28, which is fixedly connected to the side wall of the telescopic block 24 by screws. The controller is used to receive the displacement data of the second grating ruler 27 sent by the second reading head 28, and to identify the displacement of the telescopic block 24 during telescopic movement.

[0061] When measuring the distance between the output or input shaft of gearbox 5 and the upper and lower ends of gearbox 5, the controller presets the initial position of the telescopic block 24 as a reference. For the telescopic block 24 above the output or input shaft of gearbox 5, the initial zero point is preset when it is at its uppermost position inside the telescopic cylinder 23; for the telescopic block 24 below, the initial zero point is preset when it is at its lowermost position inside the telescopic cylinder 23. Simultaneously, the controller also pre-stores the distance data from the initial zero point of the upper telescopic block 24 to the bottom of the clamping plate 4, and the distance data from the initial zero point of the lower telescopic block 24 to the top of the detection platform 1. The distance from the top of the detection platform 1 to the lower end of gearbox 5 is fixed and pre-entered into the controller. Pressure sensors are fixedly connected to the end of the clamping block 20 away from the push rod 19 by screws. The controller outputs the displacement data of the first grating ruler 22 and the displacement data of the second grating ruler 27 when the pressure data collected by each pressure sensor exceeds the threshold and stabilizes.

[0062] When the telescopic block 24 in the clamping assembly moves under negative pressure, since the second reading head 28 and the telescopic block 24 are fixed and remain relatively stationary, when the telescopic block 24 slides axially within the telescopic cylinder 23, the second reading head 28 moves synchronously axially with the telescopic block 24. The second grating ruler 27 is fixed to the side wall of the telescopic cylinder 23 and parallel to the axis of the telescopic cylinder 23, ensuring that the second reading head 28 always maintains a sliding engagement with the second grating ruler 27 during its movement. The telescopic block 24 finally clamps the upper and lower ends of the output or input shaft of the gearbox 5. The cooperation of the second grating ruler 27 and the second reading head 28 can accurately measure the moving distance of the telescopic block 24. This process is consistent with the principle of measuring the moving distance of the telescopic plate 3 by the first grating ruler 22 and the first reading head 21 in the first measuring assembly, that is, by capturing the movement signal of the moiré fringes and converting it into an electrical signal, the displacement is calculated by the controller.

[0063] The height of the output or input shaft of gearbox 5 relative to the upper end of gearbox 5 is calculated by the controller based on the distance the upper telescopic block 24 moves downward from its initial zero point, the distance from its initial zero point to the bottom of clamping plate 4, and the distance from the bottom of clamping plate 4 to the upper end of gearbox 5.

[0064] The height of the output or input shaft of gearbox 5 relative to the lower end of gearbox 5 is calculated by the controller based on the distance the lower telescopic block 24 moves upward from its initial zero point, the distance from its initial zero point to the top of the detection platform 1, and the fixed distance from the top of the detection platform 1 to the lower end of gearbox 5.

[0065] When the negative pressure in the cavity and telescopic cylinder 23 continues to be generated, after the clamping plate 4 contacts the top of the gearbox 5, the clamping block 20 begins to gradually clamp the telescopic plate 3. During the process, the clamping plate 4 is further pressed against the upper end of the gearbox 5 until the clamping block 20 locks the telescopic plate 3. The pressure sensor collects pressure data greater than the threshold and then outputs the displacement data of the first grating ruler 22.

[0066] Similarly, when the negative pressure of the telescopic cylinder 23 is continuously generated, after the telescopic block 24 contacts the output shaft and input shaft of the gearbox 5, the clamping block 20 begins to gradually clamp the telescopic block 24. During the process, the telescopic block 24 is further pressed against the output shaft and input shaft of the gearbox 5 until the clamping block 20 locks the telescopic block 24. The pressure sensor collects pressure data greater than the threshold, and the controller outputs the displacement data of the second grating ruler 27.

[0067] On the one hand, because the clamping plate 4 is in close contact with the upper end of the gearbox 5, and the telescopic block 24 is in close contact with the output shaft and input shaft of the gearbox 5, the output measurement results can be more accurate; on the other hand, because the measurement results are output after the pressure data is stable, the error data of output fluctuation can be avoided.

[0068] like Figure 1 As shown, specifically, it also includes an auxiliary fixing assembly for further fixing the gearbox 5 during measurement. The auxiliary fixing assembly includes several negative pressure holes opened at the top of the detection platform 1, and the negative pressure holes are all connected to the vertical plate 2.

[0069] Once the clamping plate 4 and telescopic block 24 have stabilized the gearbox 5, to prevent the negative pressure inside the vertical plate 2 from continuously increasing and damaging the pump assembly 8, the negative pressure holes, which are connected to the vertical plate 2, can continuously generate negative pressure and attract the bottom of the gearbox 5, further stabilizing the gearbox 5. This also maintains the continuous operation of the pump assembly 8 and provides a stable clamping force for holding the gearbox 5. After the test is completed, the controller uses the pump assembly 8 to generate positive pressure, causing the clamping plate 4 and telescopic block 24 to return to their initial positions. Simultaneously, the piston, under the action of the tension spring 15, returns to its initial position, preparing for the next measurement.

[0070] During the testing process, the clamping plate 4 will first contact the top of the gearbox 5, which can play an auxiliary role in fixing the gearbox 5 as a whole; and promote the stability of the gearbox 5 during the subsequent distance testing of the output shaft and input shaft of the gearbox 5 with the upper or lower end point of the gearbox.

[0071] During the process of detecting the distance between the output shaft and input shaft of gearbox 5 and the upper or lower end point of gearbox 5, regardless of whether the output shaft and input shaft of gearbox 5 are close to the upper or lower end point of gearbox 5, the telescopic block 24 that contacts the output shaft and input shaft first will be gradually locked after contacting the output shaft and input shaft, without disturbing the position of gearbox 5; the telescopic block 24 that contacts the output shaft and input shaft later will continue to run unaffected, and will eventually be gradually locked after contacting the output shaft and input shaft, thus simultaneously completing the detection of the height of gearbox 5 and the dimensions of the output shaft or input shaft of gearbox 5 and the upper and lower end points of gearbox 5.

[0072] Example 2: As Figure 1 As shown, the difference from the above embodiment is that the detection platform 1 is provided with a slide groove, which is located on both sides of the detection platform 1. A slider is slidably fitted in the slide groove, and a cleaning nozzle 11 is fixedly connected to the slider by screws. The cleaning nozzle 11 is connected to the output port of the pump assembly 8. A driving component for driving the slider to slide in the slide groove is provided in the slide groove. In this embodiment, the driving component includes a DC motor that is fixedly connected to one end of the slide groove by screws. A threaded rod is coaxially fixedly connected to the output shaft of the DC motor, and the threaded rod is threadedly fitted to the adjacent slider.

[0073] The detection platform 1 is used to place the gearbox 5. If dust and impurities are attached to the surface of the detection platform 1, it will affect the height detection results and thus obtain incorrect data. Therefore, a cleaning nozzle 11 is set on the detection platform 1. Since the cleaning nozzle 11 is connected to the pump assembly 8, when the output port of the pump assembly 8 generates positive pressure to drive the telescopic plate 3 and the telescopic block 24 to reset, the positive pressure airflow blows out from the cleaning nozzle 11. The controller controls the DC motor output shaft to rotate back and forth, driving the threaded rod to rotate back and forth, thereby driving the slider to drive the cleaning nozzle 11 to slide back and forth in the length direction of the slide groove, thereby cleaning the surface of the detection platform 1 so that the surface of the detection platform 1 can meet the detection requirements.

[0074] Example 3: As Figure 1 As shown, the difference from the above embodiment is that a level is installed on the detection platform 1. The level is an electronic level 6, and the controller is used to issue an alarm when the electronic level 6 detects that the detection platform 1 is tilted.

[0075] The testing platform 1 needs to be level to accurately measure the height of the gearbox 5. The electronic level 6 can measure the levelness, allowing the user to determine whether the position of the testing platform 1 meets the testing requirements. The controller can read the detection information from the electronic level 6. When the detection information from the electronic level 6 does not meet the measurement requirements, it will issue an alarm to prompt the user to make adjustments.

[0076] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A gearbox height detection fixture, characterized in that, Includes a detection platform (1) and a controller; The testing platform (1) is used to place the gearbox (5). A vertical plate (2) is provided on one side of the testing platform (1). A cavity is opened in the vertical plate (2). A telescopic plate (3) is vertically slidably fitted in the cavity. A clamping plate (4) is installed on the top of the telescopic plate (3). The clamping plate (4) is parallel to the testing platform (1). The vertical plate (2) is provided with retaining components on both sides. The retaining components on both sides of the vertical plate (2) are used to lock the clamping plate (4) when it contacts the upper end of the gearbox (5). The retaining component includes piston chambers (9) symmetrically opened on both sides of the vertical plate (2) and drive boxes (10) corresponding to the piston chambers (9); pistons are slidably fitted in the piston chambers (9), and first racks (12) are fixedly connected to the top of the pistons, and the first racks (12) extend into the drive boxes (10) adjacent to them. A worm gear (13) is rotatably fitted on the inner side wall of the drive box (10). The end of the worm gear (13) away from the side wall of the drive box (10) is coaxially fixedly connected to a first gear (14). The first gear (14) meshes with the adjacent first rack (12). The end of the first rack (12) away from the piston is fixedly connected to a tension spring (15). The end of the tension spring (15) away from the rack is fixedly connected to the inner top wall of the drive box (10). Worm gears (16) are meshed on each worm (13). Each worm gear (16) rotates in cooperation with the inner wall of the adjacent drive box (10). Each worm gear (16) is coaxially fixedly connected to a second gear (17). Each second gear (17) is meshed with a second rack (18). Each second rack (18) is fixedly connected to a push rod (19) at one end. The end of the push rod (19) away from the second rack (18) passes through the side wall of the adjacent drive box (10) and is fixedly connected to a clamping block (20). A clamping assembly for clamping the input or output shaft of the gearbox (5) is provided between the top of the testing platform (1) and the bottom of the clamping plate (4); The clamping assembly includes a telescopic cylinder (23) fixedly connected to the bottom of the clamping plate (4) and the top of the detection platform (1). The telescopic cylinder (23) is slidably fitted with a piston block (25). A telescopic block (24) is fixedly connected to the piston block (25). The telescopic cylinder (23) is also provided with retaining assemblies on both sides. The retaining assemblies on both sides of the telescopic cylinder (23) are used to lock the telescopic block (24) when it contacts the output shaft or input shaft of the gearbox (5). The upper part of the telescopic cylinder (23) is connected to an air guide pipe (26). The end of the air guide pipe (26) away from the telescopic cylinder (23) is connected to the cavity in the vertical plate (2). The vertical plate (2) is provided with a first measuring component for measuring the height of the gearbox (5); the clamping assembly is provided with a second measuring component for measuring the distance between the output shaft or input shaft of the gearbox (5) and the highest and lowest points of the gearbox (5); the controller is used to acquire the measurement data of the first measuring component and the second measuring component.

2. The gearbox height detection fixture according to claim 1, characterized in that, The inner bottom wall of the testing platform (1) is provided with a driving assembly for driving the clamping plate (4) to slide vertically; the driving assembly includes a suction pipe (7) set on the side wall of the vertical plate (2), the suction pipe (7) is connected to the cavity, and also includes a pump assembly (8), the pump assembly (8) is connected to the suction pipe (7), and the controller is used to control the operation of the pump assembly (8).

3. The gearbox height detection fixture according to claim 1, characterized in that, The first measuring component includes a first reading head (21) fixedly connected to one side wall of the telescopic plate (3) and a first grating ruler (22) fixedly connected to one side wall of the vertical plate (2). The first reading head (21) and the first grating ruler (22) are slidably engaged. The controller is used to receive the displacement data of the first grating ruler (22) sent by the reading head and to identify the telescopic distance of the telescopic plate (3).

4. The gearbox height detection fixture according to claim 1, characterized in that, The second measuring component includes a second grating ruler (27) fixedly connected to the side wall of the telescopic cylinder (23) and a second reading head (28) fixedly connected to the side wall of the telescopic block (24). The controller is used to receive the displacement data of the second grating ruler (27) sent by the second reading head (28) and to identify the displacement of the telescopic block (24).

5. The gearbox height detection fixture according to claim 1, characterized in that, It also includes an auxiliary fixing component for fixing the gearbox (5), which includes several negative pressure holes opened on the top of the detection platform (1), and the negative pressure holes are all connected to the internal cavity of the vertical plate (2).

6. The gearbox height detection fixture according to claim 1, characterized in that, The testing platform (1) is provided with a slide groove, which is located on both sides of the testing platform (1). A slider is slidably fitted in the slide groove, and a cleaning nozzle (11) is installed on the slider. The cleaning nozzle (11) is connected to the output port of the pump assembly (8). A driving component for driving the slider to slide in the length direction of the slide groove is provided in the slide groove.

7. The gearbox height detection fixture according to claim 1, characterized in that, Pressure sensors are fixedly connected to the end of the clamping block (20) away from the push rod. The controller is used to output the displacement data of the first grating ruler (22) and the displacement data of the second grating ruler (27) when the pressure data collected by each pressure sensor exceeds the threshold and is stable.

8. The gearbox height detection fixture according to claim 1, characterized in that, The detection platform (1) is equipped with a level, which is an electronic level (6). The controller is used to issue an alarm when the electronic level (6) detects that the detection platform (1) is tilted.

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