A power take-off idle test bench

Abstract

The utility model discloses a kind of power take-off idle test bench, including pedestal and servo motor, servo motor is installed on pedestal by electric sliding table, and servo motor can be moved transversely and height adjusted by electric sliding table, and the output shaft of servo motor is equipped with the spline connection shaft adapted with the spline hole of power take-off;Including power take-off positioning seat, power take-off positioning seat is installed on pedestal, and power take-off positioning seat is located in the direction of servo motor transverse movement;Power take-off positioning seat includes positioning seat bottom plate and the positioning plate installed on positioning seat bottom plate, positioning seat bottom plate is equipped with left rotation angle cylinder and right rotation angle cylinder, left rotation angle cylinder and right rotation angle cylinder are located positioning plate side, for compactly placing power take-off on positioning plate;Positioning plate is equipped with the positioning cylindrical pin and positioning pin edge pin corresponding with power take-off.The utility model can reduce rework problem caused by power take-off in combination with original gearbox assembly running-in mode, to improve assembly efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of gearbox assembly auxiliary equipment, specifically, it relates to a power take-off (PTO) no-load test bench. Background Technology

[0002] Transmission break-in testing is a crucial step after transmission manufacturing or overhaul. Its purpose is to ensure proper fit between internal gears, bearings, and other moving parts through controlled operation, and to verify assembly quality. The power take-off (PTO) is installed on the transmission and is essentially a geared transmission device, typically consisting of a gearbox, clutch, and controller. It is directly connected to the low-gear or auxiliary gearbox output shaft (usually using a splined groove and splined shaft connection structure) to transfer a portion of the engine's power to external working devices (such as lift pumps, hydraulic motors, etc.). Structurally, the PTO is designed as an independent gear within the transmission; engaging this gear allows the drive of external equipment via the accelerator pedal. It is considered an auxiliary device or component within the transmission.

[0003] Existing methods for breaking in transmissions typically involve testing the entire transmission assembly (transmission and power take-off) as a whole. This is done manually by connecting the transmission assembly to the test bench via splines, followed by bolting. Due to the large mass of the transmission assembly, the spline-to-spline connection process requires multiple tools and steps, resulting in high labor intensity and time consumption.

[0004] If the break-in test reports an error, it's difficult to quickly and accurately determine whether the problem lies with the PTO or the transmission, as the break-in test simultaneously tests both the transmission and the PTO. Even if the break-in test confirms a quality issue with the PTO, the entire transmission assembly still needs to be disassembled and the PTO replaced, resulting in rework and impacting assembly efficiency. Therefore, a dedicated test bench for PTOs is needed to perform no-load tests on the PTO separately. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a power take-off (PTO) no-load test bench, including a base; a servo motor mounted on the base via an electric slide, which allows for lateral movement and height adjustment; the servo motor's output shaft is equipped with a splined connecting shaft adapted to the splined hole of the PTO; and a PTO positioning seat mounted on the base, positioned in the direction of the servo motor's lateral movement. The PTO positioning seat includes a base plate and a positioning plate mounted on the base plate. The base plate has a left-hand rotation cylinder and a right-hand rotation cylinder located beside the positioning plate for pressing the PTO placed on the positioning plate. The positioning plate has a positioning cylindrical pin and a positioning pin edge pin corresponding to the PTO.

[0006] The preferred embodiment of the power take-off (PTO) no-load test bench of this utility model is as follows: The bench includes a bench plate and a bench welding frame connected to the bottom of the bench plate. The bench plate is provided with slide rails, a rodless cylinder, and a positioning support for supporting the positioning base plate. There are two slide rails, and the rodless cylinder is located between the two slide rails and connected to an electric slide table to drive the electric slide table to move along the slide rails. The electric slide table includes a slider slidably connected to each slide rail and a slide table base plate connected to the two sliders. A slide table support plate and an X-axis displacement stage are connected sequentially above the slide table base plate, and the slide table support plate and the slide table base plate are connected by adjustable height connecting bolts. The servo motor is mounted on the X-axis displacement stage. The X-axis displacement stage and the slide rails enable the servo motor to adjust its position in the horizontal plane, meeting the connection requirements of different spline hole positions of different PTO models, and realizing the use of one test bench for no-load testing of multiple types of PTOs.

[0007] The preferred embodiment of the power take-off (PTO) no-load test bench of this utility model is as follows: a positioning plate pad is provided between the positioning plate and the positioning base plate, thereby suspending the lower part of the middle of the positioning plate; a space is provided in the middle of the positioning plate and an oil collection box is provided directly opposite the space below the positioning plate. The space is to provide oil collection space for the oil collection box, which collects the gear oil inside the PTO during the test process, preventing gear oil from contaminating the test bench.

[0008] The preferred embodiment of the power take-off unloaded test bench in this utility model is as follows: the bench frame is equipped with a control cabinet, the control panel of the control cabinet is equipped with a panel-type servo motor controller and a three-position five-way manual reversing valve, the panel-type servo motor controller is electrically connected to the servo motor, and the three-position five-way manual reversing valve is connected to the rodless cylinder, the left rotation angle cylinder and the right rotation angle cylinder respectively.

[0009] The advantages of the power take-off (PTO) no-load test bench in this invention are as follows: 1. The testing method involves placing the power take-off (PTO) on the positioning plate, simultaneously inserting the positioning cylindrical pin and the positioning pin side pin into the positioning holes of the PTO one-to-one. Then, the extension rods of the left and right rotation cylinders descend, thereby pressing the corresponding model of PTO firmly onto the positioning plate, achieving complete positioning with two pins on one side. Equipped with a pneumatic clamping mechanism and a pneumatic slide, it enables rapid clamping of the corresponding model of PTO, replacing manual operation and improving testing efficiency.

[0010] 2. The PTO no-load test bench serves as a dedicated testing device for PTOs, enabling low-to-medium speed no-load break-in for corresponding PTO models. This eliminates the need for testing the PTO alongside the transmission, allowing for direct identification of quality issues. Furthermore, separate testing of the PTO effectively avoids the disassembly and assembly of the transmission assembly, significantly reducing the labor intensity of the testing process.

[0011] 3. Applicable to power take-offs with similar structures, the electric slide can adjust the distance between the servo motor and the power take-off, and the appropriate spline connecting shaft can also be replaced. At the same time, the height of the power take-off can be adjusted through the power take-off positioning seat, which can efficiently complete the docking between the spline connecting shaft and the spline hole. Therefore, it has a certain degree of universality for power take-offs with similar structures, which reduces subsequent maintenance costs, avoids rework due to failure, improves assembly efficiency, and enhances assembly quality. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the no-load test bench for the power take-off device in this utility model; Figure 2 This is a schematic diagram of the structure of the pedestal in this embodiment; Figure 3 This is a schematic diagram of the motor slide in this embodiment; Figure 4 This is a schematic diagram of the power take-off positioning seat in this embodiment.

[0014] Attached reference numerals: 1. Base welding frame; 2. Panel-mounted servo motor controller; 3. Three-position five-way manual directional valve; 4. Control panel; 5. Base; 6. Motor slide; 7. Servo motor; 8. Power take-off positioning seat; 9. Spline connecting shaft; 10. Coupling; 11. Control cabinet; 12. Adjustable feet; 5-1. Base plate; 5-2. Slide rail pad; 5-3. Rodless cylinder; 5-4. Speed ​​control valve; 5-5. Slide rail; 5-6. Positioning seat support; 6-1. Slider; 6-2. Slider baffle; 6-3. Slide table base plate; 6-4. Locking nut; 6-5. Adjusting nut; 6-6. Slide table support plate; 6-7. Connecting bolt; 6-8. X-axis displacement stage; 8-1. Positioning seat base plate; 8-2. Positioning plate pad; 8-3. Left rotation angle cylinder; 8-4. Positioning cylindrical pin; 8-5. Right rotation angle cylinder; 8-6. Positioning pin side pin; 8-7. Positioning plate; 8-8. Oil collection box. Detailed Implementation

[0015] In view of the shortcomings of the prior art, the inventor of this utility model has, through long-term research and extensive practice, proposed the technical solution of this utility model. The following will further explain and illustrate the technical solution, its implementation process, and its principles in conjunction with the accompanying drawings and specific implementation examples.

[0016] like Figure 1 As shown, this embodiment provides a power take-off (PTO) no-load test bench, including a base 5, which includes a base plate 5-1 and a base welding frame 1 connected to the base plate 5-1.

[0017] The welding stand 1 has four adjustable feet 12 at the bottom of its four legs for leveling. A control cabinet 11 is located on the upper part of the welding stand 1, and the control cabinet 11 has a control panel 4 facing forward.

[0018] like Figure 2 As shown, the base plate 5-1 is equipped with slide rails 5-5, rodless cylinders 5-3, and positioning support seats 5-6. There are two slide rails 5-5, parallel to each other and laterally fixed to the base plate 5-1, with the lateral positioning along the Y-axis. The rodless cylinder 5-3 is located between the two slide rails 5-5, and both its inlet and outlet ends are equipped with speed regulating valves 5-4. The speed regulating valves 5-4 adjust the extension and retraction speeds of the rodless cylinder 5-3, respectively. There are four positioning support seats 5-6, arranged in a matrix to the right of the rodless cylinder 5-3.

[0019] like Figure 2 and Figure 3As shown, this embodiment also includes an electric slide table mounted on two slide rails 5-5, with the slide rails 5-5 fixedly connected to the base plate 5-1 via slide rail pads 5-2. The electric slide table is connected to a rodless cylinder 5-3 for driving the electric slide table to move along the slide rails 5-5. The electric slide table includes a slider 6-1 slidably connected to each slide rail 5-5 and a slide table base plate 6-3 connected to the two sliders 6-1. The slide table base plate 6-3 is provided with a slider baffle 6-2, which is connected to the rodless cylinder 5-3 and serves as an intermediate connecting member. A slide table support plate 6-6 and an X-axis displacement stage 6-8 are sequentially connected above the slide table base plate 6-3, and the slide table support plate 6-6 and the slide table base plate 6-3 are connected by adjustable height connecting bolts 6-7. Specifically, the connecting bolt 6-7 is equipped with a locking nut 6-4 and an adjusting nut 6-5. The height of the slide support plate 6-6 can be adjusted by using the locking nut 6-4 and the adjusting nut 6-5 together. A positioning plate pad 8-2 is provided between the positioning plate 8-7 and the positioning base plate 8-1, thus suspending the lower part of the middle of the positioning plate 8-7. The positioning plate 8-7 has a space in the middle, and an oil collection box 8-8 is located directly opposite the space below the positioning plate 8-7. The space provides room for the oil collection box 8-8 to collect gear oil from inside the power take-off during the test, preventing gear oil from contaminating the test bench.

[0020] like Figure 1 and Figure 3 As shown, this embodiment also includes a servo motor 7, which is used to drive the power take-off (PTO) to idle. The servo motor 7 is mounted on the X-axis displacement stage 6-8. The X-axis displacement stage 6-8 and the slide rail 5-5 allow the servo motor 7 to be adjusted to any position in the XY direction in the horizontal plane. Combined with the height adjustment of the connecting bolts 6-7, this meets the connection requirements of different PTO models with varying spline hole positions, enabling a single test bench to meet the no-load testing requirements of multiple types of PTOs. The output shaft of the servo motor 7 is connected to the spline connecting shaft 9 via a coupling 10. The coupling 10 is a clamping diaphragm elastic coupling 10, facilitating easy assembly and disassembly of the spline connecting shaft 9. The spline connecting shaft 9 can be replaced according to the model of the PTO's spline hole.

[0021] like Figure 1 and Figure 4As shown, this embodiment also includes a power take-off (PTO) positioning seat 8, which is mounted on a positioning seat support 5-6. The PTO positioning seat 8 includes a positioning seat base plate 8-1 and a positioning plate 8-7 mounted on the positioning seat base plate 8-1. A left-turning cylinder 8-3 and a right-turning cylinder 8-5 are provided on the positioning seat base plate 8-1. Two left-turning cylinders 8-3 and two right-turning cylinders 8-5 are provided, with one left-turning cylinder 8-3 and one right-turning cylinder 8-5 located on the same side of the positioning plate 8-7, and the other left-turning cylinder 8-3 and the other right-turning cylinder 8-5 located on the other side of the positioning plate 8-7. Each left-turning cylinder 8-3 and each right-turning cylinder 8-5 has a horizontal pressure bar on its telescopic shaft. The horizontal pressure bar is pressed against the PTO by the telescopic shaft descending. In addition, the positioning plate 8-7 is provided with a positioning cylindrical pin 8-4 and a positioning pin side pin 8-6 corresponding to the power take-off, which are used to limit the translation of the power take-off.

[0022] The control section in this embodiment is as follows: like Figure 1 As shown, the control panel 4 is equipped with a panel-type servo motor controller 2 and a three-position five-way manual reversing valve 3. The panel-type servo motor controller 2 is electrically connected to the servo motor 7, and the three-position five-way manual reversing valve 3 is connected to the rodless cylinder 5-3, the left rotation angle cylinder 8-3 and the right rotation angle cylinder 8-5 respectively.

[0023] The control principle is as follows: After adjusting the position of the motor slide 6, the power take-off (PTO) is placed on the positioning plate 8-7 via the positioning cylindrical pin 8-4 and the positioning pin side pin 8-6. The left rotation angle cylinder 8-3 and the right rotation angle cylinder 8-5 are controlled by the lower three-position five-way manual reversing valve 3 to press the PTO firmly. Then, the servo motor 7 is controlled to rotate at low speed by the panel-type servo motor controller 2. The rodless cylinder 5-3 is then controlled by the upper three-position five-way manual reversing valve 3 to move the motor slide 6 forward to complete the engagement of the spline connecting shaft 9 with the spline of the PTO. The no-load break-in test of the PTO can be achieved by adjusting the speed of the servo motor 7 as required.

[0024] This embodiment uses a power take-off (PTO) no-load break-in test bench in conjunction with the existing gearbox assembly break-in method, which can reduce rework issues caused by the PTO and thus improve assembly efficiency. The use of a pneumatic clamping and motor slide 6 enables rapid clamping of the corresponding PTO model. The PTO no-load break-in test bench is equipped with a displacement function; by replacing the locating pins and spline connecting shaft 9, it has a certain degree of versatility for PTOs with similar structures, reducing initial investment and subsequent maintenance costs.

[0025] It should be understood that the above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. It should not be considered that the specific implementation of this utility model is limited to these descriptions. For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A power take-off (PTO) no-load test bench, characterized in that: Includes pedestal; It includes a servo motor, which is mounted on a base via an electric slide. The servo motor can move laterally and adjust its height via the electric slide. The output shaft of the servo motor is equipped with a splined connecting shaft that is compatible with the splined hole of the power take-off. The system includes a power take-off (PTO) positioning seat, which is mounted on a base and positioned in the direction of the servo motor's lateral movement. The PTO positioning seat includes a base plate and a positioning plate mounted on the base plate. The base plate is equipped with a left-hand rotation cylinder and a right-hand rotation cylinder, which are located next to the positioning plate and are used to press the PTO placed on the positioning plate. The positioning plate is equipped with a positioning cylindrical pin and a positioning pin edge pin corresponding to the PTO.

2. The power take-off (PTO) no-load test bench according to claim 1, characterized in that: The pedestal includes a pedestal plate and a pedestal welding frame connected to the bottom of the pedestal plate. The pedestal plate is provided with slide rails, a rodless cylinder, and a positioning support for supporting the positioning base plate. There are two slide rails. The rodless cylinder is located between the two slide rails and is connected to the electric slide table to drive the electric slide table to move along the slide rails.

3. The power take-off (PTO) no-load test bench according to claim 2, characterized in that: The electric slide table includes a slider slidably connected to each slide rail and a slide table base plate connected to the two sliders. A slide table support plate and an X-axis displacement stage are connected sequentially above the slide table base plate. The slide table support plate and the slide table base plate are connected by adjustable height connecting bolts. The servo motor is mounted on the X-axis displacement stage.

4. The power take-off (PTO) no-load test bench according to claim 3, characterized in that: A positioning plate pad is provided between the positioning plate and the positioning base plate, thereby suspending the lower part of the center of the positioning plate; a space is provided in the center of the positioning plate and an oil collection box is provided directly opposite the space below the positioning plate.

5. A power take-off (PTO) no-load test bench according to claim 2, characterized in that: The four legs of the welding stand are each equipped with adjustable feet at their lower ends.

6. A power take-off (PTO) no-load test bench according to claim 2, characterized in that: The pedestal welding frame is equipped with a control cabinet. The control panel of the control cabinet is equipped with a panel-type servo motor controller and a three-position five-way manual reversing valve. The panel-type servo motor controller is electrically connected to the servo motor, and the three-position five-way manual reversing valve is connected to the rodless cylinder, the left rotation angle cylinder, and the right rotation angle cylinder, respectively.

7. A power take-off (PTO) no-load test bench according to claim 1, characterized in that: The spline connecting shaft is connected to the output shaft of the servo motor via a coupling.

8. A power take-off (PTO) no-load test bench according to claim 2, characterized in that: The rodless cylinder is equipped with speed control valves at both the inlet and outlet ends.

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