Test board for detecting abnormal sound of gear surface of reduction gearbox for production

Abstract

The invention discloses a production test bench for detecting abnormal sound of a gear surface of a reduction gearbox, the production test bench comprises a support frame and the reduction gearbox, a test frame is installed in front of the upper surface of the support frame, the top of the test frame is replaceably provided with a placing plate suitable for reduction gearboxes of different models, and the outer side of the test frame is symmetrically provided with a plurality of pressing cylinders. A pressing plate used for pressing and fixing the position of the reduction gearbox is installed on a piston rod of the pressing air cylinder, different containing plates can be replaced, the device is suitable for various types of reduction gearboxes, and the universality of the device is improved. The reduction gearbox is pressed by the cylinder, and the half shaft adopts a milling machine type clamping structure, so that the disassembly and assembly are quick. And the servo motor is matched with the controller, so that the rotating speed is accurately and stably adjusted. Lubricating and cleaning are integrated, an oil pump system can continuously lubricate the tooth surface in the testing process, a filtering device can effectively filter produced residual particles, the gear is protected, the testing accuracy is improved, lubricating oil can be recycled, waste is reduced, and the testing cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of gearbox testing technology, specifically to a test bench for detecting abnormal noise on the gear teeth of a gearbox used in production. Background Technology

[0002] Currently, gearboxes require gear surface noise testing before leaving the factory, and common testing equipment often uses high-speed input loading for testing. This type of equipment has the following problems:

[0003] 1. High input speed: This results in higher overall noise during the test, making it difficult to clearly identify abnormal noises on the tooth surface and affecting the accuracy of the test.

[0004] 2. Fixed interface: The connection between the test bench and the gearbox is mostly fixed, which cannot be adapted to different models of gearboxes. When changing the test component, the entire connection component needs to be replaced, which is inefficient and costly.

[0005] 3. Inconvenient clamping: The installation method of the half shaft is complicated and the replacement is time-consuming, which affects the testing efficiency.

[0006] 4. Inaccurate speed control: Traditional motors have a limited speed range and cannot achieve low-speed, stable, and adjustable input conditions, which is not conducive to the precise operation of abnormal noise detection.

[0007] 5. Lack of lubrication and cleaning functions: The gear surface cannot be effectively lubricated during the test, and residual production particles inside the gearbox cannot be filtered, affecting the accuracy of the test and the life of the equipment.

[0008] Therefore, there is an urgent need for a low-speed, low-noise gearbox gear surface noise testing device that features flexible interfaces, convenient clamping, precise speed adjustment, and lubrication and filtration functions. To this end, a testing bench for detecting gearbox gear surface noise in production is proposed. Summary of the Invention

[0009] The purpose of this invention is to provide a test bench for detecting abnormal noise on the gear teeth of a gearbox in production, so as to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a test bench for detecting abnormal noise on the gear surface of a gearbox, comprising a support frame and a gearbox, wherein a test frame is installed in front of the upper surface of the support frame, and a placement plate adapted to different models of gearboxes is replaceably installed on the top of the test frame, and multiple clamping cylinders are symmetrically installed on the outer side of the test frame, wherein a clamping plate for clamping and fixing the position of the gearbox is installed on the piston rod of the clamping cylinder;

[0011] The test frame is symmetrically equipped with half-shaft propulsion mechanisms for inserting into the output end of the gearbox on both sides. The upper surface of the support frame is equipped with a transmission mechanism for driving the half-shaft propulsion mechanism to rotate and thus driving the gearbox to run. The half-shaft propulsion mechanism and the transmission mechanism are connected by belt drive.

[0012] The bottom of the support frame is equipped with an oil spraying lubrication mechanism that sprays lubricating oil onto the gear teeth of the gearbox.

[0013] Preferably, the transmission mechanism includes a servo motor and a transmission shaft. The transmission shaft is rotatably connected to the upper surface of the support frame, and the servo motor is fixedly installed on the upper surface of the support frame. A first pulley is installed in the middle of the transmission shaft, and the first pulley is connected to the output shaft of the servo motor via a belt drive.

[0014] Preferably, the two ends of the drive shaft are symmetrically equipped with second pulleys, and the two sides of the test frame are symmetrically rotatably connected with third pulleys for driving the half-shaft propulsion mechanism to rotate. The second pulleys and the third pulleys are connected by belt drive.

[0015] Preferably, the half-shaft propulsion mechanism includes two connecting plates, which are slidably connected to both sides of the test frame. Drive cylinders for moving the two connecting plates are respectively installed on the top lower surface of the support frame. A connecting cylinder is rotatably connected to the top of the connecting plate, and the connecting cylinder is slidably connected to the inner side of the third pulley.

[0016] Preferably, the outer side of the connecting cylinder is uniformly and integrally formed with a first connecting tooth, and the interior of the third pulley is uniformly provided with connecting tooth grooves, wherein the first connecting tooth and the connecting tooth groove are adapted to each other.

[0017] Preferably, a clamping cylinder is inserted into one end of the connecting cylinder near the gearbox, and a threaded hole is provided at one end of the clamping cylinder near the connecting cylinder. A threaded rod adapted to the threaded hole is inserted into the other end of the connecting cylinder away from the clamping cylinder for pulling the clamping cylinder inward. A limit groove is provided on the outer side of the clamping cylinder, and a protrusion adapted to the limit groove is provided inside the connecting cylinder to prevent the clamping cylinder from rotating.

[0018] Preferably, the clamping cylinder has a plurality of clamping plates arranged in a conical shape at the end away from the connecting cylinder, the inner side of the connecting cylinder near the clamping cylinder has a conical surface for squeezing the plurality of clamping plates, the inner side of the plurality of clamping plates has a half shaft inserted into the output end of the gearbox, and the outer side of the half shaft has a second connecting tooth integrally formed for driving the gearbox to run.

[0019] Preferably, the oil injection lubrication mechanism includes an oil reservoir and an oil pump. The oil inlet of the oil pump is connected to the oil reservoir via a pipe, and the oil outlet of the oil pump is connected to a spray frame via a pipe. The spray frame is located inside the test frame, and multiple nozzles facing the gearbox are installed on the spray frame.

[0020] Preferably, the oil storage tank is connected to a recovery pipe for lubricating oil return, the recovery pipe is connected to the inside of the test frame, and the inside of the oil storage tank is equipped with a filter screen for filtering the lubricating oil.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. It adopts a low-speed input mode, resulting in low overall operating noise and making it easy to clearly detect abnormal noises on the tooth surface.

[0023] 2. Different mounting plates can be replaced to accommodate various gearbox models, improving the equipment's versatility.

[0024] 3. The gearbox is clamped by a cylinder, and the half shaft adopts a milling machine-type clamping structure, which allows for quick assembly and disassembly.

[0025] 4. The servo motor, in conjunction with the controller, enables precise and stable speed adjustment.

[0026] 5. Integrated Lubrication and Cleaning: The oil pump system provides continuous lubrication to the gear surfaces during testing, while the filter effectively filters out residual particles from production, protecting the gears and improving testing accuracy. The lubricating oil can be recycled, reducing waste and lowering testing costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the transmission mechanism of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the present invention viewed from below;

[0030] Figure 4 This is a cross-sectional structural diagram of the half-shaft propulsion mechanism of the present invention;

[0031] Figure 5 This is a schematic diagram of the oil injection lubrication mechanism of the present invention;

[0032] Figure 6 This is a schematic diagram of the half-shaft propulsion mechanism of the present invention;

[0033] Figure 7 This is an exploded view of the structure of the half-shaft propulsion mechanism of the present invention.

[0034] In the diagram: 1. Support frame; 2. Test frame; 3. Gearbox; 4. Clamping cylinder; 5. Clamping plate; 6. Transmission mechanism; 61. Servo motor; 62. Drive shaft; 63. First pulley; 64. Second pulley; 65. Third pulley; 651. Connecting tooth groove; 7. Oil spraying and lubrication mechanism; 71. Oil tank; 72. Oil pump; 73. Spray frame; 74. Recovery pipe; 8. Half-shaft propulsion mechanism; 81. Connecting plate; 82. Connecting cylinder; 821. First connecting tooth; 822. Conical surface; 83. Drive cylinder; 84. Clamping cylinder; 841. Limiting groove; 842. Clamping plate; 85. Half-shaft; 851. Second connecting tooth; 86. Threaded rod; 9. Placement plate. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Please see Figure 1-7 The present invention provides a technical solution: a test bench for detecting abnormal noise on the gear surface of a gearbox in production, including a support frame 1 and a gearbox 3 to be tested. The support frame 1 is an integral support structure, and a test frame 2 is fixedly installed on the front of its upper surface by bolts. The top of the test frame 2 is installed with a placement plate 9 by a detachable connection method such as bolts. The placement plate 9 can be replaced according to the external dimensions and mounting hole positions of different models of gearboxes 3 to achieve the adaptation and placement of gearboxes 3 of various specifications.

[0037] Multiple clamping cylinders 4, preferably 2 to 4, are symmetrically distributed on the outer wall of the test frame 2. The piston rod of each clamping cylinder 4 is fixedly mounted with a clamping plate 5 by screws. The clamping plate 5 is a metal plate with a buffer pad layer, which is used to clamp and fix the gearbox 3 from all sides under the drive of the clamping cylinder 4 to prevent the gearbox 3 from shifting during the test.

[0038] A half-shaft propulsion mechanism 8 is symmetrically installed on the left and right side walls of the test frame 2. The output end of the half-shaft propulsion mechanism 8 can move horizontally and insert into the output ends of the gearbox 3 on both sides. A transmission mechanism 6 is fixedly installed behind the upper surface of the support frame 1. The transmission mechanism 6 and the half-shaft propulsion mechanism 8 are connected by a belt to achieve power transmission, which drives the half-shaft propulsion mechanism 8 to rotate, thereby driving the gearbox 3 to run at a set speed. An oil spraying lubrication mechanism 7 is installed in the bottom frame of the support frame 1. The output end of the oil spraying lubrication mechanism 7 extends into the interior of the test frame 2, which is used to spray lubricating oil onto the tooth surface of the gearbox 3 during operation, and at the same time realize the recovery and filtration of lubricating oil.

[0039] like Figure 1 and Figure 2As shown: The transmission mechanism 6 includes a servo motor 61 and a transmission shaft 62. The transmission shaft 62 is rotatably connected to the upper surface of the support frame 1 via a bearing housing, and the bearing housing is fixed to the support frame 1 with bolts. The servo motor 61 is fixedly mounted on the rear side of the upper surface of the support frame 1 via a motor mounting bracket, and the output shaft of the servo motor 61 is parallel to the transmission shaft 62. A first pulley 63 is fixedly mounted in the middle of the transmission shaft 62. The first pulley 63 is connected to the pulley mounted on the output shaft of the servo motor 61 via a synchronous belt drive, realizing the transmission of power from the servo motor 61 to the transmission shaft 62. The speed of the servo motor 61 can be precisely adjusted by a frequency converter.

[0040] like Figure 1 and Figure 2 As shown: Symmetrically mounted second pulleys 64 are mounted on both ends of the drive shaft 62. The two second pulleys 64 are of identical specifications and coaxially arranged with the drive shaft 62. Third pulleys 65 are rotatably connected to the left and right sides of the test frame 2 via bearings. The third pulleys 65 are connected to the half-shaft propulsion mechanism 8 for driving its rotation. Each second pulley 64 is connected to the corresponding third pulley 65 via a synchronous belt drive, ensuring that the power of the drive shaft 62 is synchronously transmitted to the half-shaft propulsion mechanisms 8 on both sides.

[0041] like Figure 4 , Figure 6 and Figure 7 As shown: The half-shaft propulsion mechanism 8 includes two identical connecting plates 81. The two connecting plates 81 are slidably connected to the left and right sides of the test frame 2 via guide rods to ensure smooth sliding of the connecting plates 81. Drive cylinders 83 are fixedly installed on the lower surface of the top of the support frame 1, corresponding to the positions of the two connecting plates 81. The piston rods of the drive cylinders 83 are connected to the connecting plates 81 and are used to drive the connecting plates 81 to move along the guide rods. A connecting cylinder 82 is rotatably connected to the top of the connecting plates 81 via bearings. The connecting cylinder 82 has a hollow cylindrical structure, and its middle part can move left and right in the inner hole of the third pulley 65. The connecting cylinder 82 can rotate synchronously with the third pulley 65 via the first connecting tooth 821 and the connecting tooth groove 651.

[0042] like Figure 6 and Figure 7 As shown: Multiple first connecting teeth 821 are uniformly and integrally formed on the outer side wall of the connecting cylinder 82 along the circumferential direction. Connecting tooth grooves 651 are uniformly formed on the inner side wall of the third pulley 65 along the circumferential direction. The number and tooth shape of the connecting tooth grooves 651 are adapted to the first connecting teeth 821. The first connecting teeth 821 are inserted into the connecting tooth grooves 651 to realize the power transmission between the connecting cylinder 82 and the third pulley 65, while ensuring that the connecting cylinder 82 can slide along the axial direction of the third pulley 65.

[0043] like Figure 6and Figure 7 As shown: A clamping cylinder 84 is inserted into the end of the connecting cylinder 82 near the gearbox 3. The clamping cylinder 84 has a hollow structure and can move axially along the connecting cylinder 82. An axially extending threaded hole is provided at the end of the clamping cylinder 84 near the connecting cylinder 82. A threaded rod 86 is inserted into the end of the connecting cylinder 82 away from the clamping cylinder 84. One end of the threaded rod 86 extends into the connecting cylinder 82 and is threadedly matched with the threaded hole on the clamping cylinder 84. Rotating the threaded rod 86 can pull the clamping cylinder 84 inward along the connecting cylinder 82. At least one limiting groove 841 is provided axially on the outer side wall of the clamping cylinder 84. A protrusion, such as an axial ridge, is provided on the inner side wall of the connecting cylinder 82 that matches the limiting groove 841. The protrusion is embedded in the limiting groove 841 to restrict the rotational freedom of the clamping cylinder 84, so that the clamping cylinder 84 can only move axially along the connecting cylinder 82.

[0044] like Figure 6 and Figure 7 As shown: The end of the clamping cylinder 84 away from the connecting cylinder 82 is divided circumferentially to form multiple clamping plates 842, which are arranged in a conical shape. The inner wall of the end of the connecting cylinder 82 near the clamping cylinder 84 is provided with a conical part 822. The taper of the conical part 822 is adapted to the angle of the conical arrangement of the clamping plates 842. When the clamping cylinder 84 moves inward, the conical part 822 presses against the outer wall of each clamping plate 842, causing the clamping plates 842 to retract inward. A half-shaft 85 is clamped and fixed inside the multiple clamping plates 842. One end of the half-shaft 85 can be inserted into the output end of the gearbox 3. A second connecting tooth 851 is integrally formed on the outer wall of the half-shaft 85 along the circumferential direction. The second connecting tooth 851 meshes with the internal gear ring at the output end of the gearbox 3 to drive the internal gears of the gearbox 3.

[0045] like Figure 5 As shown: The oil spraying lubrication mechanism 7 includes an oil reservoir 71 and an oil pump 72. The oil reservoir 71 is fixedly installed inside the bottom frame of the support frame 1 and is used to store lubricating oil. The oil inlet of the oil pump 72 is connected to the inside of the oil reservoir 71 through an oil inlet pipe, and the oil outlet of the oil pump 72 is connected to a spray frame 73 through a hose. The spray frame 73 is located inside and below the test frame 2, and its position corresponds to the tooth surface of the gearbox 3. Multiple nozzles are evenly installed on the spray frame 73, and the spray direction of each nozzle is towards the tooth surface of the gearbox 3, which is used to atomize the lubricating oil and spray it evenly on the tooth surface to achieve lubrication and cleaning.

[0046] like Figure 5As shown: The top of the oil storage tank 71 is equipped with an oil return port, which is connected to the interior of the test frame 2 through a recovery pipe 74. The recovery pipe 74 is connected to the bottom oil outlet of the test frame 2, which is used to return the lubricating oil dripping from the test frame 2 to the oil storage tank 71. A filter screen, such as a stainless steel filter screen, is detachably installed inside the oil storage tank 71 near the oil return port. The filter screen has a filtration accuracy of 50-100 mesh, which is used to filter production particles and impurities carried in the lubricating oil, ensure the cleanliness of the circulating lubricating oil, extend the service life of the equipment and improve the accuracy of the test.

[0047] Working principle: According to the model of the gearbox 3 under test, replace the placement plate 9 on the top of the test frame 2. After placing the gearbox 3 on the placement plate 9, start the multiple clamping cylinders 4 symmetrically installed on the outside of the test frame 2. The piston rod of the clamping cylinder 4 pushes the clamping plate 5 to move, clamping and fixing the gearbox 3 from all sides to prevent displacement during the test.

[0048] Start the drive cylinder 83 on the lower surface of the top of the support frame 1. The drive cylinder 83 drives the connecting plate 81 to slide along the test frame 2, causing the connecting cylinder 82 connected to the top of the connecting plate 81 to move towards the reduction gearbox 3. This allows the half shaft 85 inside the clamping cylinder 84 to be inserted into the output end of the reduction gearbox 3. At the same time, the second connecting tooth 851 on the outside of the half shaft 85 meshes with the inner gear ring at the output end of the reduction gearbox 3, and the first connecting tooth 821 on the outside of the connecting cylinder 82 is embedded in the connecting tooth groove 651 of the third pulley 65.

[0049] The servo motor 61 in the transmission mechanism 6 is started. The output shaft of the servo motor 61 drives the first pulley 63 in the middle of the transmission shaft 62 to rotate via a belt, thereby driving the transmission shaft 62 to rotate. The second pulleys 64 at both ends of the transmission shaft 62 drive the third pulleys 65 on both sides of the test frame 2 to rotate via belts. The third pulleys 65 drive the connecting cylinder 82, clamping cylinder 84 and half shaft 85 to rotate synchronously through the engagement of the first connecting tooth 821 and the connecting tooth groove 651. Finally, the gears inside the reduction gearbox 3 are driven to run at the set speed. The servo motor 61 can achieve precise speed adjustment through the frequency converter.

[0050] During the test, the oil pump 72 of the oil spraying and lubrication mechanism 7 is activated. The oil pump 72 draws lubricating oil from the oil storage tank 71 through a pipeline and delivers it to the spray frame 73 inside the test frame 2. Multiple nozzles on the spray frame 73 evenly spray lubricating oil onto the gear surfaces of the gearbox 3, achieving lubrication and cleaning. The used lubricating oil drips to the bottom of the test frame 2 and flows back to the oil storage tank 71 through the recovery pipe 74. After impurities are filtered out by the filter screen inside the oil storage tank 71, it can be recycled.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test bench for detecting abnormal noise on the gear teeth of a gearbox, comprising a support frame (1) and a gearbox (3), characterized in that: A test frame (2) is installed in front of the upper surface of the support frame (1). The top of the test frame (2) is replaceably equipped with a placement plate (9) adapted to different models of gearboxes (3). Multiple clamping cylinders (4) are symmetrically installed on the outside of the test frame (2). A clamping plate (5) for clamping and fixing the position of the gearbox (3) is installed on the piston rod of the clamping cylinder (4). The test frame (2) is symmetrically equipped with half-shaft propulsion mechanisms (8) for inserting into the output end of the gearbox (3). The support frame (1) is equipped with a transmission mechanism (6) for driving the half-shaft propulsion mechanism (8) to rotate and thus drive the gearbox (3) to run. The half-shaft propulsion mechanism (8) and the transmission mechanism (6) are connected by belt drive. The bottom of the support frame (1) is equipped with an oil spraying lubrication mechanism (7) that sprays lubricating oil onto the tooth surface of the gearbox (3).

2. The test bench for detecting abnormal noise on the gearbox tooth surface in production, as described in claim 1, is characterized in that: The transmission mechanism (6) includes a servo motor (61) and a transmission shaft (62). The transmission shaft (62) is rotatably connected to the upper surface of the support frame (1). The servo motor (61) is fixedly installed on the upper surface of the support frame (1). A first pulley (63) is installed in the middle of the transmission shaft (62). The first pulley (63) is connected to the output shaft of the servo motor (61) by belt drive.

3. The test bench for detecting abnormal noise on the gearbox tooth surface in production, as described in claim 2, is characterized in that: The two ends of the drive shaft (62) are symmetrically equipped with second pulleys (64), and the two sides of the test frame (2) are symmetrically rotatably connected with third pulleys (65) for driving the half-shaft propulsion mechanism (8) to rotate. The second pulley (64) and the third pulley (65) are connected by belt drive.

4. The test bench for detecting abnormal noise on the gearbox tooth surface in production, as described in claim 3, is characterized in that: The half-shaft propulsion mechanism (8) includes two connecting plates (81), which are slidably connected to both sides of the test frame (2). The top and lower surface of the support frame (1) is respectively equipped with drive cylinders (83) for moving the two connecting plates (81). The top of the connecting plate (81) is rotatably connected to a connecting cylinder (82), which is slidably connected to the inner side of the third pulley (65).

5. The test bench for detecting abnormal noise on the gearbox tooth surface in production, as described in claim 4, is characterized in that: The outer side of the connecting cylinder (82) is uniformly integrally formed with a first connecting tooth (821), and the inner side of the third pulley (65) is uniformly provided with a connecting tooth groove (651). The first connecting tooth (821) is adapted to the connecting tooth groove (651).

6. The test bench for detecting abnormal noise on the gearbox tooth surface in production, as described in claim 4, is characterized in that: A clamping cylinder (84) is inserted into one end of the connecting cylinder (82) near the gearbox (3). The clamping cylinder (84) has a threaded hole at one end near the connecting cylinder (82). A threaded rod (86) adapted to the threaded hole is inserted into the other end of the connecting cylinder (82) away from the clamping cylinder (84) for pulling the clamping cylinder (84) inward. A limiting groove (841) is opened on the outer side of the clamping cylinder (84). The inside of the connecting cylinder (82) has a protrusion adapted to the limiting groove (841) to prevent the clamping cylinder (84) from rotating.

7. The test bench for detecting abnormal noise on the gearbox tooth surface in production as described in claim 6, characterized in that: The clamping cylinder (84) has a plurality of clamping plates (842) arranged in a conical shape at one end away from the connecting cylinder (82). The connecting cylinder (82) has a conical surface (822) on the inner side of one end near the clamping cylinder (84) for squeezing the plurality of clamping plates (842). The inner side of the plurality of clamping plates (842) has a half shaft (85) inserted into the output end of the gearbox (3). The outer side of the half shaft (85) has a second connecting tooth (851) integrally formed for driving the gearbox (3) to run.

8. The test bench for detecting abnormal noise on the gearbox tooth surface in production as described in claim 1, characterized in that: The oil spraying lubrication mechanism (7) includes an oil reservoir (71) and an oil pump (72). The oil inlet of the oil pump (72) is connected to the oil reservoir (71) through a pipe. The oil outlet of the oil pump (72) is connected to a spray frame (73) through a pipe. The spray frame (73) is located inside the test frame (2). Multiple nozzles facing the gearbox (3) are installed on the spray frame (73).

9. The test bench for detecting abnormal noise on the gearbox tooth surface in production, as described in claim 8, is characterized in that: The oil storage tank (71) is connected to a recovery pipe (74) for lubricating oil return, the recovery pipe (74) is connected to the inside of the test frame (2), and the inside of the oil storage tank (71) is equipped with a filter screen for filtering the lubricating oil.

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