A testing fixture for gearbox assembly

Abstract

This utility model discloses a testing fixture for gearbox assembly, relating to the field of gearbox processing technology. It includes a base, a fixed frame fixedly mounted on one side of the base, and two movable frames slidably mounted on the base opposite to the fixed frame. The fixed frame has a testing bracket that can move left and right relative to the fixed frame. The testing bracket has a testing component that can move up and down, and the testing component can also move closer to or further away from the fixed frame. The fixed frame also has a movable pressure plate, and the movable frames have movable L-shaped clamps. The two L-shaped clamps are arranged opposite each other. The testing component includes a detachable testing head. This utility model has high versatility and flexibility, and can achieve full coverage testing of complex cavities, tooth surfaces, etc., greatly improving testing efficiency and range.

Description

Technical Field

[0001] This utility model relates to the field of gearbox processing technology, specifically to a testing fixture for gearbox assembly. Background Technology

[0002] In the production and assembly process of gearboxes, performing various inspections (such as dimensional accuracy, positional accuracy, surface flaw detection, and cleanliness) on the assembled gearbox housing (or internal gears and other components) is a crucial step in ensuring product quality. Traditional inspection methods typically have the following drawbacks:

[0003] Positioning and fixing are difficult: The gearbox housing has an irregular shape and varying dimensions, making it difficult to fix quickly, stably, and without damage during testing. In particular, it is necessary to limit its displacement in the horizontal and vertical directions to prevent shaking from affecting the testing accuracy.

[0004] Low detection efficiency: Manually adjusting the position of the detection probe is time-consuming and laborious, making it difficult to achieve rapid and comprehensive coverage detection of different locations inside the enclosure (especially complex cavities and tooth surfaces).

[0005] Poor adaptability: For gearboxes of different models or sizes, special tooling is often required, which is not very versatile and increases costs and changeover time.

[0006] Insufficient inspection flexibility: Different inspection items (such as flaw detection, tooth surface inspection, and cleanliness inspection) require the replacement of different inspection probes or tools. Traditional tooling makes it difficult to achieve quick, convenient replacement and precise positioning of inspection heads.

[0007] Low level of automation: The proportion of manual operation is large, and the consistency and reliability of testing are easily affected by human factors.

[0008] For example, Chinese patent CN221364605U discloses a tooling for assembling a gearbox, including a tooling base, two fixed brackets, each with a first hydraulic rod engaged on one side, and a clamping plate fixed to one end of each first hydraulic rod. A groove is formed at the center of the top of one of the fixed brackets, and a detection bracket slides along the inner wall of the groove. A second hydraulic rod is fixed to the top of the detection bracket, and a support plate is fixed to the top of the second hydraulic rod. In this invention, the gearbox components are placed on the upper part of the tooling base. Activating the first hydraulic rod causes the clamping plate to hold them, while simultaneously activating the electric telescopic rod moves the detection bracket in the groove to adjust the gear's position. Activating the second hydraulic rod lowers the support plate, allowing the gear to mesh with the sawtooth on the upper part of the gearbox. Activating the motor rotates the sawtooth to detect the normal operation of the gearbox. This tooling also allows for clamping and positioning, reducing gearbox assembly costs and improving the device's practicality.

[0009] This patent failed to address the aforementioned technical pain points. Therefore, there is an urgent need for a specialized tooling that can quickly, accurately, and stably fix gearbox housings of different sizes, and flexibly and efficiently drive multiple detection probes to be precisely positioned in three-dimensional space to achieve automated or semi-automated detection. Utility Model Content

[0010] The technical problem to be solved by this utility model is to overcome the defects of the existing technology and provide a testing fixture for gearbox assembly that is highly versatile and flexible, and can achieve full coverage testing of complex cavities, tooth surfaces, etc., which greatly improves the testing efficiency and range.

[0011] To solve the above-mentioned technical problems, the technical solution of this utility model is: a testing fixture for gearbox assembly, including a base, a fixed frame fixedly provided on one side of the base, two movable frames slidably provided on the base opposite to the fixed frame, a testing bracket provided on the fixed frame that can move left and right relative to the fixed frame, a testing component provided on the testing bracket that can move up and down, and the testing component can also move closer to or away from the fixed frame, a movable pressure plate provided on the fixed frame, a movable L-shaped clamping plate provided on the movable frame, the two L-shaped clamping plates being arranged opposite to each other, and the testing component including a detachable testing head.

[0012] Furthermore, two slide rails are fixedly provided on the base, and a slide groove corresponding to the slide rails is opened at the bottom of the movable frame.

[0013] Furthermore, two drive cylinders are fixedly installed on the base, and the output ends of the two drive cylinders are respectively fixedly connected to the two movable frames.

[0014] Furthermore, the pressure plate is connected to the fixed frame and the L-shaped clamp is connected to the movable frame via an electric push rod.

[0015] Furthermore, a groove is provided on the top of the fixing frame, and a slider corresponding to the groove is fixed on the bottom of the detection bracket.

[0016] Furthermore, a first lead screw is rotatably provided in the groove, the slider is threadedly connected to the first lead screw, and a first drive motor for driving the first lead screw to rotate is fixed on the fixing frame.

[0017] Furthermore, the detection assembly also includes a detection seat, and a lifting cylinder is provided on the detection bracket. The lifting cylinder is slidable relative to the detection bracket, and the output end of the lifting cylinder is fixedly connected to the detection seat. The detection head is detachably fixedly connected to the detection seat.

[0018] Furthermore, a second lead screw is rotatably mounted on the lifting cylinder, a connecting block is fixedly provided at the bottom of the lifting cylinder, the connecting block is threadedly connected to the second lead screw, a guide rod is fixedly provided on one side of the second lead screw, the connecting block passes through the guide rod and is slidable relative to the guide rod, and a second drive motor for driving the second lead screw to rotate is also fixedly provided on the detection bracket.

[0019] Furthermore, a detection plate is fixedly provided on the top of the detection head, a T-shaped mounting block is fixedly provided on the top of the detection plate, a T-shaped groove corresponding to the T-shaped mounting block is opened on the bottom of the detection seat, and a threaded hole communicating with the T-shaped groove is also opened on the detection seat. A fastening bolt is threadedly connected in the threaded hole, and the end of the fastening bolt abuts against the T-shaped mounting block.

[0020] By adopting the above technical solution, this utility model has the following beneficial effects:

[0021] 1. Through two independently sliding movable frames and their L-shaped clamps, in conjunction with the pressure plate on the fixed frame, and driven by an electric push rod, gearbox housings of different sizes can be quickly and firmly clamped. The L-shaped clamps act on two adjacent corners of the housing, and the pressure plate acts on the other side wall, forming multi-point constraints to ensure that the housing remains stable during the testing process, providing a reliable foundation for high-precision testing.

[0022] 2. The detection bracket can move precisely left and right along the slide rail on the top of the fixed frame under the drive of the first drive motor via the first lead screw mechanism. The detection component can move up and down in the vertical direction via the lifting cylinder. The detection seat can move back and forth under the drive of the second drive motor via the second lead screw mechanism. The three-axis linkage adjustment mechanism enables the detection head to accurately and quickly position any point inside or outside the box that needs to be detected, achieving full coverage detection of complex cavities, tooth surfaces, etc., greatly improving detection efficiency and range.

[0023] 3. The structure of using T-shaped mounting blocks and T-slots, supplemented by fastening bolts, enables quick and reliable installation and disassembly between the detection head and the detection seat. This significantly improves the versatility and flexibility of the tooling, allowing for rapid replacement of the corresponding detection tools according to different detection requirements without replacing the entire tooling or making complex adjustments, thus reducing changeover time and costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the testing fixture for gearbox assembly according to this utility model. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the testing fixture for gearbox assembly according to this utility model. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structure of the testing fixture for gearbox assembly according to this utility model. Figure 3 ;

[0027] Figure 4 for Figure 3 Enlarged view of part A in the image.

[0028] Reference numerals: 1. Base; 2. Fixed frame; 3. Movable frame; 4. Detection bracket; 5. Detection component;

[0029] 10. Electric push rod; 11. Slide rail; 12. Drive cylinder; 21. Pressure plate; 22. Slide groove; 23. Guide bar;

[0030] 24. First lead screw; 25. First drive motor; 31. L-shaped clamp; 41. Slider; 42. Lifting cylinder;

[0031] 43. Second lead screw; 44. Guide rod; 45. Second drive motor; 46. Detection plate; 47. Connecting block;

[0032] 421. T-slot; 461. T-mounting block; 51. Detection seat; 52. Detection head; 512. Fastening bolt. Detailed Implementation

[0033] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0034] In this embodiment, a testing fixture for gearbox assembly is provided, which is suitable for gearbox bodies with a square structure. It includes a base 1, a fixed frame 2 is fixedly provided on one side of the base 1, and two movable frames 3 are slidably provided on the base 1 relative to the fixed frame 2. The fixed frame 2 is provided with a testing bracket 4 that can move left and right relative to the fixed frame 2. The testing bracket 4 is provided with a testing component 5 that can move up and down, and the testing component 5 can also move closer to or away from the fixed frame 2. The fixed frame 2 is also provided with a movable pressure plate 21, and the movable frame 3 is provided with a movable L-shaped clamping plate 31. The two L-shaped clamping plates 31 are arranged opposite each other.

[0035] In this embodiment, two slide rails 11 are fixedly provided on the base 1, and the bottom of the movable frame 3 is provided with a slide groove 22 corresponding to the slide rails 11, so that the movable frame 3 can move left and right along the slide rails 11 on the base 1. Two drive cylinders 12 are also fixedly provided on the base 1, and the output ends of the two drive cylinders 12 are respectively fixedly connected to the two movable frames 3.

[0036] In this embodiment, the pressure plate 21 and the fixed frame 2, and the L-shaped clamp 31 and the movable frame 3 are all connected by an electric push rod 10. The electric push rod 10 can drive the pressure plate 21 and the L-shaped clamp 31 to move, so that the two L-shaped clamps 31 abut against the two adjacent corners of the box body respectively, and the pressure plate 21 abuts against the side wall on the other side of the box body. The two L-shaped clamps 31 and the pressure plate 21 cooperate to restrict the displacement of the box body in the horizontal and vertical directions, thereby fixing the box body on the base 1 to facilitate the testing work.

[0037] In this embodiment, a sliding groove 22 is provided on the top of the fixed frame 2, and a slider 41 corresponding to the sliding groove 22 is fixedly provided on the bottom of the detection bracket 4, so that the detection bracket 4 can move left and right relative to the fixed frame 2. A guide strip 23 is fixedly provided on the side wall of the sliding groove 22, and a guide groove corresponding to the guide strip 23 is provided on the slider 41 to prevent the detection bracket 4 from deviating when sliding.

[0038] In this embodiment, a first lead screw 24 is rotatably provided in the slide groove 22, and the slider 41 is threadedly connected to the first lead screw 24. A first drive motor 25 is fixedly provided on the fixed frame 2. The first drive motor 25 is used to drive the first lead screw 24 to rotate. When the first lead screw 24 rotates, it drives the slider 41 threadedly connected to it to move in the slide groove 22, thereby driving the detection bracket 4 to move left and right relative to the fixed frame 2.

[0039] In this embodiment, the detection component 5 includes a detection seat 51 and a detection head 52. A lifting cylinder 42 is provided on the detection bracket 4. The output end of the lifting cylinder 42 is fixedly connected to the detection seat 51, so that the lifting cylinder 42 can drive the detection seat 51 to move up and down relative to the base 1. The bottom of the lifting cylinder 42 is slidably disposed on the detection bracket 4. The detection head 52 is detachably fixedly connected to the detection seat 51.

[0040] Specifically, a second lead screw 43 is rotatably mounted on the detection bracket 4, and a connecting block 47 is fixedly mounted on the bottom of the lifting cylinder 42. The connecting block 47 is threadedly connected to the second lead screw 43. A guide rod 44 is fixedly provided on one side of the second lead screw 43. The connecting block 47 passes through the guide rod 44 and is slidable relative to the guide rod 44. A second drive motor 45 for driving the second lead screw 43 to rotate is also fixedly provided on the detection bracket 4. When the second drive motor 45 drives the second lead screw 43 to rotate, it drives the connecting block 47 to move along the guide rod 44 on the detection bracket 4, thereby causing the connecting block 47 to drive the lifting cylinder 42 and the detection seat to move on the detection bracket 4. By setting the guide rod 44, relative rotation can be avoided when the second lead screw 43 drives the connecting block 47 to move.

[0041] In this embodiment, a detection plate 46 is fixedly mounted on the top of the detection head 52, and a T-shaped mounting block 461 is fixedly mounted on the top of the detection plate 46. A T-shaped groove 421 corresponding to the T-shaped mounting block 461 is opened at the bottom of the detection seat 51. A threaded hole communicating with the T-shaped groove 421 is also opened on the detection seat 51, and a fastening bolt 512 is threaded into the threaded hole. The T-shaped mounting block 461 on the top of the detection plate 46 is inserted into the T-shaped groove 421, and the fastening bolt 512 is rotated so that the end of the fastening bolt 512 abuts against the T-shaped mounting block 461, thereby fixing the detection head 52 onto the detection seat 51. In this embodiment, the detection head 52 can be a camera. During operation, electronic scanning of areas such as gear tooth roots and tooth surfaces can be achieved, generating intuitive 2D or 3D images. This has enabled the detection of fatigue cracks in gear tooth roots, spalling on bearing raceways, cracks on tooth and shaft surfaces, and spalling and pitting on gears and bearings. The detection head 52 can also be a motor-driven rotating detection gear. Moving the detection gear to the gearbox and meshing with it allows for the detection of the gearbox's normal operation. In other embodiments (not shown), the detection head 52 can be replaced with a negative pressure cleaning head, using negative pressure adsorption to clean dust and impurities inside the gearbox. Different components can be replaced according to the operating conditions; their specific structures are not described in detail in this embodiment.

[0042] The working process and principle of this utility model are as follows: The gearbox housing is placed on the base 1. The drive cylinder 12 drives the two movable frames 3 to move on the base 1, so that the relatively far sides of the two L-shaped clamps 31 abut against the two side walls of the housing. The electric push rod 10 drives the two L-shaped clamps 31 and the pressure plate 21 to move, so that the two L-shaped clamps 31 abut against the two adjacent corners of the housing respectively, and the pressure plate 21 abuts against the side wall of the other side of the housing. The two L-shaped clamps 31 and the pressure plate 21 cooperate to restrict the displacement of the housing in the horizontal and vertical directions, thereby fixing the housing on the base 1. Replace the corresponding detection head 52. Specifically, insert the T-shaped mounting block 461 on the top of the detection plate 46 into the T-shaped mounting block 52. Within the groove 421, the fastening bolt 512 is rotated, causing its end to abut against the T-shaped mounting block 461, thereby fixing the detection head 52 onto the detection seat 51. The first drive motor 25 is then activated, driving the first lead screw 24 to rotate. When the lead screw 24 rotates, it drives the threaded slider 41 to move within the groove 22, thereby causing the detection bracket 4 to move left and right relative to the fixed frame 2. The second drive motor 45 is then activated, driving the second lead screw 43 to rotate, causing the detection seat 51 to move along the guide rod 44 on the detection bracket 4. The lifting cylinder 42 is then activated, causing the detection seat 51 to move up and down relative to the base 1, thus enabling the detection of various positions within the housing. The testing process involves two independently sliding movable frames 3 and their L-shaped clamps 31, working in conjunction with the pressure plate 21 on the fixed frame 2. Driven by an electric push rod 10, these frames can quickly and securely clamp gearbox bodies of different sizes. The L-shaped clamps 31 act on two adjacent corners of the gearbox body, while the pressure plate 21 acts on the other side wall, forming multi-point constraints to ensure the gearbox body remains stable during testing, providing a reliable foundation for high-precision testing. The testing bracket 4, driven by the first drive motor 25 via the first lead screw 24 mechanism, can move precisely left and right along the slide rail 11 at the top of the fixed frame 2. The testing seat 51, driven by the lifting cylinder 42, can move vertically up and down. The testing seat 51 is also controlled by the second lead screw 4... Driven by the second drive motor 45, the 3rd mechanism can move back and forth on the detection bracket 4. The three-axis linkage adjustment mechanism enables the detection head 52 to accurately and quickly position any point inside or outside the box that needs to be detected, achieving full coverage detection of complex cavities, tooth surfaces, etc., greatly improving detection efficiency and range. The structure of using T-shaped mounting block 461 and T-shaped groove 421 in conjunction with fastening bolt 512 to lock the structure realizes quick and reliable installation and disassembly between the detection head 52 and the detection seat 51, significantly improving the versatility and flexibility of the tooling. It can quickly change the corresponding detection tool according to different detection project requirements without replacing the entire tooling or making complex adjustments, reducing changeover time and cost.

[0043] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A testing fixture for gearbox assembly, suitable for gearbox bodies with square mechanisms, characterized in that: The device includes a base (1), a fixed frame (2) is fixedly provided on one side of the base (1), two movable frames (3) are slidably provided on the base (1) relative to the fixed frame (2), a detection bracket (4) is provided on the fixed frame (2) and can move left and right relative to the fixed frame (2), a detection component (5) is provided on the detection bracket (4) and can move up and down, and the detection component (5) can also move closer to or away from the fixed frame (2), a movable pressure plate (21) is also provided on the fixed frame (2), a movable L-shaped clamp (31) is provided on the movable frame (3), the two L-shaped clamps (31) are arranged opposite to each other, and the detection component (5) includes a detachable detection head (52).

2. The gearbox assembly inspection fixture according to claim 1, characterized in that: Two slide rails (11) are fixedly provided on the base (1), and the bottom of the movable frame (3) is provided with a slide groove (22) corresponding to the slide rails (11).

3. The gearbox assembly inspection fixture according to claim 2, characterized in that: Two drive cylinders (12) are also fixedly installed on the base (1), and the output ends of the two drive cylinders (12) are respectively fixedly connected to the two movable frames (3).

4. The gearbox assembly inspection fixture according to claim 1, characterized in that: The pressure plate (21) is connected to the fixed frame (2) and the L-shaped clamp (31) is connected to the movable frame (3) by an electric push rod (10).

5. The gearbox assembly inspection fixture according to claim 1, characterized in that: The top of the fixed frame (2) is provided with a sliding groove (22), and the bottom of the detection bracket (4) is fixed with a slider (41) corresponding to the sliding groove (22).

6. The gearbox assembly inspection fixture according to claim 5, characterized in that: The first lead screw (24) is rotatably provided in the groove (22), the slider (41) is threadedly connected to the first lead screw (24), and the first drive motor (25) for driving the first lead screw (24) to rotate is fixed on the fixing frame (2).

7. The gearbox assembly inspection fixture according to claim 1, characterized in that: The detection component (5) also includes a detection seat (51), and a lifting cylinder (42) is provided on the detection bracket (4). The lifting cylinder (42) is slidable relative to the detection bracket (4). The output end of the lifting cylinder (42) is fixedly connected to the detection seat (51), and the detection head (52) is detachably fixedly connected to the detection seat (51).

8. The gearbox assembly inspection fixture according to claim 7, characterized in that: The detection bracket (4) is rotatably mounted with a second lead screw (43), and a connecting block (47) is fixedly mounted on the bottom of the lifting cylinder (42). The connecting block (47) is threadedly connected to the second lead screw (43). A guide rod (44) is fixedly provided on one side of the second lead screw (43). The connecting block (47) passes through the guide rod (44) and is slidable relative to the guide rod (44). The detection bracket (4) is also fixedly provided with a second drive motor (45) for driving the second lead screw (43) to rotate.

9. A testing fixture for gearbox assembly according to claim 7, characterized in that: The top of the detection head (52) is fixedly provided with a detection plate (46), and the top of the detection plate (46) is fixedly provided with a T-shaped mounting block (461). The bottom of the detection seat (51) is provided with a T-shaped groove (421) corresponding to the T-shaped mounting block (461). The detection seat (51) is also provided with a threaded hole that communicates with the T-shaped groove (421). A fastening bolt (512) is threadedly connected in the threaded hole, and the end of the fastening bolt (512) abuts against the T-shaped mounting block (461).

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