Gearbox internal gear clearance detection device

Abstract

The invention discloses a gear box internal gear clearance detection device, and overcomes the defects that a lead pressing method, a feeler gauge method and other methods are generally adopted in the industry to measure the gear backlash for the measurement of the gear box internal gear clearance, the lead pressing method and the feeler gauge method seriously depend on the technical experience of operators, and the measurement accuracy is high. In the prior art, measurement results are high in subjectivity, poor in repeatability and low in efficiency, a scale indirect measurement method utilizes a dial indicator or a dial indicator, a striking rod is in contact with the tooth surface of a gear, the gear is manually shaken to read the swing amplitude of a pointer, measurement space is required, the gear in a gear box is usually required to be detached for measurement, and operation is complex. Therefore, the gear backlash detection device in the gear box can perform high-precision measurement on the gear backlash of the gear box.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gear box quality detection, in particular, to a gear box internal gear gap detection device. BACKGROUND

[0002] Gear box is the core component of mechanical transmission system, and the meshing quality of the internal gear pair directly determines the precision, efficiency, noise level and working reliability of the whole transmission system. Among them, the tooth side gap is a key technical index to measure the meshing quality. Proper tooth side gap can compensate for the size change caused by heating and elastic deformation, ensure lubrication, and prevent jamming; however, too large gap will lead to transmission impact, noise and reduced motion accuracy, while too small gap will cause severe wear and tear, severe heating, and even tooth surface gluing or tooth breakage. Therefore, in the final inspection and regular maintenance of gear box manufacturing and assembly, fast and accurate detection of gear gap is an indispensable step to ensure product quality and equipment life.

[0003] At present, for the measurement of gear box internal gear gap, the industry generally uses lead pressing method, plug gauge method and scale indirect measurement method to measure the gear side gap. The lead pressing method and plug gauge method seriously depend on the technical experience of the operator, and the measurement result is subjective, with poor repeatability and low efficiency. The scale indirect measurement method uses a dial gauge or a micrometer, contacts the gear tooth surface by hitting a rod, and reads the pointer swing by manually shaking the gear. It has requirements for the measurement space, and usually needs to disassemble the gear in the gear box for measurement, which is relatively complex to operate.

[0004] Therefore, it is an urgent problem to be solved by the present application to provide a gear box internal gear gap detection device capable of high-precision measurement of gear box gear side gap. SUMMARY

[0005] In view of the above technical problems, the purpose of the present application is to overcome the problem that the industry generally uses lead pressing method, plug gauge method and scale indirect measurement method to measure the gear side gap, the lead pressing method and plug gauge method seriously depend on the technical experience of the operator, and the measurement result is subjective, with poor repeatability and low efficiency. The scale indirect measurement method uses a dial gauge or a micrometer, contacts the gear tooth surface by hitting a rod, and reads the pointer swing by manually shaking the gear. It has requirements for the measurement space, and usually needs to disassemble the gear in the gear box for measurement, which is relatively complex to operate. Thus, a gear box internal gear gap detection device capable of high-precision measurement of gear box gear side gap is provided.

[0006] In order to achieve the above object, the application provides a gear box internal gear gap detection device, which comprises a workbench, a lifting platform, a gear side gap detection assembly and a driving mechanism, and a gear box to be detected is detachably arranged on the workbench; the lifting platform is arranged above the workbench in a lifting manner, and a mounting shell matched with the gear box shell is arranged at the lower end of the lifting platform; a plurality of gear side gap assemblies corresponding to each gear in the gear box are arranged in the mounting shell; wherein the gear side gap detection assembly comprises coaxially arranged first and second rotating gears, an arc-shaped groove is coaxially arranged on the first rotating gear, a first clamping column matched with the arc-shaped groove is arranged on the second rotating gear, and the second rotating gear is rotatably arranged in the arc-shaped groove through the driving mechanism; a visual detection system corresponding to each gear side gap detection assembly is further arranged in the mounting shell; and a control system is used to receive images transmitted by the visual detection system, and the actual rotation angle θ of the second rotating gear is identified and calculated through image processing.

[0007] Preferably, the driving mechanism comprises a first elastic member, a fixed column is arranged on one side of the arc-shaped groove of the first rotating gear, one end of the first elastic member is sleeved on the first clamping column, and the other end of the first elastic member is sleeved on the fixed column; a driving frame, the outer end of the driving frame is triangular, and the opposite two side walls of the driving frame are respectively abutted on the fixed column and the first clamping column; and a reciprocating assembly, the reciprocating assembly is used to drive the driving frame to reciprocate along the length direction of the driving frame.

[0008] Preferably, the reciprocating assembly comprises a first driving motor and a rotating disc, the first driving motor is arranged in the first rotating gear, and a rotating disc is coaxially arranged on the output end of the first driving motor, a second clamping column is arranged at the position deviated from the axis of the rotating disc, and a strip-shaped groove matched with the second clamping column is arranged in the middle of the driving frame.

[0009] Preferably, limiting frames are arranged on the opposite two sides of the first rotating gear and used to limit the reciprocating movement of the driving frame along the length direction of the driving frame.

[0010] Preferably, the device further comprises a lead screw sliding table mechanism used to drive the workbench to move towards the position below the lifting platform and a linear driver used to drive the lifting platform to lift.

[0011] Preferably, the visual detection system comprises an industrial camera, the industrial camera is arranged in the mounting shell, and a light source is arranged at the camera end of the industrial camera; and a communication module is arranged on the lifting platform and used to transmit the images of the second rotating gear before and after rotation collected by the industrial camera to the control system.

[0012] Preferably, a rotation-stopping sleeve is coaxially arranged at one end of the gear box outside any gear, and a positioning hole is vertically arranged through the rotation-stopping sleeve, and a positioning pin matched with the rotation-stopping sleeve is detachably arranged in the positioning hole, and a through hole is arranged at the lower end of the positioning pin.

[0013] Preferably, the pin pulling mechanism comprises a mounting frame arranged outside the mounting shell, a second elastic member, and a pin pulling rod horizontally and telescopically arranged on the mounting frame through the second elastic member, and a plurality of guide rods are horizontally arranged through the mounting frame on the pin pulling rod; and a guide slide is arranged on the rotation-stopping sleeve to guide the pin pulling rod to pull out the positioning pin.

[0014] Preferably, the device further comprises a second driving motor for driving any first rotating gear or second rotating gear to rotate.

[0015] And a gear gap detection method inside a gear box comprises the following steps: S1, the upper cover of the gear box to be detected is lifted to expose the internal gear pair, and then the gear box body is fixed on the workbench; S2, the positioning pin is inserted into the positioning hole to prevent the gear pair inside the gear box from rotating; S3, the workbench is moved to below the lifting platform, the lifting platform is started to descend, the mounting shell cover is arranged on the gear box shell, and the first rotating gear and the second rotating gear in the superimposed state are engaged with the gears inside the gear box; S4, the second rotating gear is driven to rotate along the arc-shaped groove direction through the reciprocating movement of the driving frame until it is in a stable state; S5, the visual detection system collects the photos of the angular displacement relationship formed by the first rotating gear and the second rotating gear before and after the rotation of the second rotating gear, and uploads them to the control system; S6, the control system processes the collected images, accurately identifies the angular displacement of the second rotating gear by using the tooth profile edge extraction or feature point matching technology, compares the angular displacement value with the preset qualified range, and outputs the detection result; S7, whether all the gear teeth inside the gear box are detected is determined, if yes, the workbench is moved to the next work process, and if not, step S8 is continued; S8, the second rotating gear is driven to rotate along the arc-shaped groove direction through the reciprocating movement of the driving frame until the first rotating gear and the second rotating gear are in the superimposed state, and then the second driving motor is started to drive the first rotating gear and the second rotating gear to rotate synchronously until the next set of gear teeth of the smallest diameter gear inside the gear box is in the engaged state, and returns to step S5.

[0016] According to the technical scheme, the application has the beneficial effects that: firstly, the gear box is opened to expose the internal gear pair, and the box body is accurately fixed on the workbench, then the positioning pin is inserted, and the linkage characteristics of the gear transmission are used to lock all gears of the entire gear box at a certain angle position, which ensures that the meshing starting point of the detection gear and the gear of the gear box is completely consistent every time the detection is performed, and fundamentally eliminates the randomness of the position caused by the free rotation of the gear, so as to facilitate the initial meshing with the first rotating gear and the second rotating gear, the lifting platform is lowered, the first rotating gear and the second rotating gear in the "coincidence state" are accurately meshed with the locked gear of the gear box, at the same time, the pin pulling rod will be extended into the positioning pin hole when the pin pulling rod is separated from the guide slide during the lowering process, and the pin pulling rod is pulled out of the positioning hole under the action of the lifting platform, so that the first rotating gear and the second rotating gear are meshed with the gears inside the gear box, and can be rotated by the second driving motor, then the first driving motor is started to drive the rotating disc to rotate, so as to drive the driving frame to reciprocate by the cooperation of the second clamping column and the strip-shaped groove, due to the existence of the gear side gap, the second rotating gear or the first rotating gear will first "idle" through this side gap, which is manifested as the sliding of the arc-shaped groove relative to the first clamping column, due to the existence of the second driving motor, the entire gear set is in a locked state, and the first rotating gear or the second rotating gear will fill this side gap, the high-resolution industrial camera collects images before and after rotation to capture the actual angular displacement of the second rotating gear, the control system calculates the accurate actual angular displacement θ by the sub-pixel precision image algorithm, and compares it with the qualified range of angle θ, and then judges the qualification, and starts the second driving motor to drive the first rotating gear and the second rotating gear to rotate synchronously until the next set of teeth of the smallest diameter gear inside the gear box is in the meshing state, and the operation is repeated until the detection of all teeth inside the gear box is completed.

[0017] Other features and advantages of the present application will be described in detail in the following detailed description section; and the parts not involved in the present application are the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following detailed description to explain the present application, but do not constitute a limitation on the present application. In the drawings: Figure 1 is a perspective view of a gear gap detection device inside a gear box provided in a preferred embodiment of the present application; Figure 2 is a partial perspective view of a gear gap detection device inside a gear box provided in a preferred embodiment of the present application Figure 1 ; Figure 3 is Figure 2 is an enlarged view of A in FIG. 1; Figure 4 is a partial plan view of the gear box internal gear gap detection device provided in a preferred embodiment of the present application Figure 1 ; Figure 5 is a partial perspective view of the gear box internal gear gap detection device provided in a preferred embodiment of the present application Figure 2 ; Figure 6 is a partial perspective view of the gear box internal gear gap detection device provided in a preferred embodiment of the present application Figure 3 ; Figure 7 is Figure 6 is an enlarged view of B in FIG. 1; Figure 8 is a partial perspective view of the gear box internal gear gap detection device provided in a preferred embodiment of the present application Figure 4 ; Figure 9 is a partial plan view of the gear box internal gear gap detection device provided in a preferred embodiment of the present application Figure 2 ; Figure 10 is a partial perspective view of the gear box internal gear gap detection device provided in a preferred embodiment of the present application Figure 5 ; Figure 11 is a comparison diagram of the images collected before and after the gear rotation by the visual detection system of the gear box internal gear gap detection device provided in a preferred embodiment of the present application; Figure 12 is a flow chart of the gear box internal gear gap detection method provided in a preferred embodiment of the present application.

[0019] Explanation of reference signs: 1, workbench; 11, gear box; 111, positioning hole; 112, rotation-stopping sleeve; 113, positioning pin; 1131, through hole; 2, lifting platform; 21, mounting shell; 3, gear backlash detection assembly; 31, first rotating gear; 311, arc-shaped groove; 312, fixing column; 313, limiting frame; 32, second rotating gear; 321, first clamping column; 4, driving mechanism; 41, first elastic member; 42, driving frame; 421, strip-shaped groove; 43, reciprocating assembly; 431, first driving motor; 432, rotating disc; 433, second clamping column; 5, visual detection system; 51, industrial camera; 511, light source; 52, communication module; 6, pin pulling mechanism; 61, mounting frame; 62, second elastic member; 63, pin pulling rod; 64, guide slide; 65, guide rod; 7, second driving motor; 8, screw slide mechanism; 9, linear driver. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0021] In the description of the embodiments of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second", "third" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In addition, if the terms "horizontal", "vertical", "overhanging" and the like appear, they do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0022] In the description of the embodiments of the present application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "mounting", "connection", "connection" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In order to further understand the features, technical means and specific purposes and functions of the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0024] Referring to Figure 1 , Figure 2 and Figure 8 : A gear box internal gear gap detection device, comprising: a workbench 1, wherein a gear box 11 to be detected is detachably arranged on the workbench 1; a lifting platform 2, which is arranged above the workbench 1 in a lifting manner, and the lower end of the lifting platform 2 is provided with a mounting shell 21 matched with the shell of the gear box 11; a gear side gap detection assembly 3 and a driving mechanism 4, wherein the mounting shell 21 is internally provided with a plurality of gear side gap assemblies corresponding to each gear inside the gear box 11; wherein the gear side gap detection assembly 3 comprises coaxially arranged first and second rotating gears 31 and 32, the first rotating gear 31 is coaxially provided with an arc-shaped groove 311, the second rotating gear 32 is provided with a first clamping column 321 matched with the arc-shaped groove 311, and the second rotating gear 32 is rotatably arranged in the arc-shaped groove 311 through the driving mechanism 4; a visual detection system 5, wherein the mounting shell 21 is internally provided with a visual detection system 5 corresponding to each gear side gap detection assembly 3; a control system, which is used to receive images transmitted by the visual detection system 5, and to identify and calculate the actual rotation angle θ of the second rotating gear 32 through image processing.

[0025] Each first rotating gear 31 and second rotating gear 32 of the present application can perfectly mesh with the gear box 11 gear without side gap, and in the initial state, the first rotating gear 31 and the second rotating gear 32 are in the coincident state, thereby facilitating the initial meshing with the internal gear of the gear box 11; the difficult-to-catch gear side gap is directly converted into the relative angular displacement between the first and second gears, and the visual system does not need to detect the difficult-to-catch small tooth surface displacement, but measures a more obvious gear rotation angle θ which is "enlarged" by a mechanical structure, greatly reducing the difficulty and error of image recognition, improving the overall measurement accuracy, and being more suitable for automation.

[0026] Referring to Figure 8 and Figure 9 : Preferably, the driving mechanism 4 comprises: a first elastic member 41, wherein the first rotating gear 31 is provided with a fixed column 312 on one side of the arc-shaped groove 311, one end of the first elastic member 41 is sleeved on the first clamping column 321, and the other end is sleeved on the fixed column 312; a driving frame 42, wherein the outer end of the driving frame 42 is triangular, and the opposite two side walls thereof are respectively abutted on the fixed column 312 and the first clamping column 321; a reciprocating assembly 43, wherein the reciprocating assembly 43 is used to drive the driving frame 42 to reciprocate along the length direction thereof.

[0027] The whole detection process of the application is naturally realized by mechanical configuration, without the need of complex electronic sensors to determine whether the gap is eliminated.

[0028] With reference to Figure 10 Preferably, the reciprocating assembly 43 comprises a first driving motor 431 and a rotating disc 432, the first driving motor 431 is arranged inside the first rotating gear 31, and the output end thereof is coaxially provided with the rotating disc 432, the rotating disc 432 is provided with a second clamping column 433 at the position deviated from the axis thereof, and the middle of the driving frame 42 is provided with a strip-shaped slot 421 matched with the second clamping column 433.

[0029] The first driving motor 431 of the application is a step motor, and is controlled to start and stop through an encoder; the step motor can realize accurate rotation control, and the encoder can provide more accurate position feedback, when the second rotating gear 32 completely eliminates the gear side gap inside the gear box 11, the step motor will stop rotating in time, the whole device is in a stable state, and the overshoot is prevented, thereby providing a clear and stable image source for the visual detection system 5.

[0030] With reference to Figure 9 Preferably, the first rotating gear 31 is provided with a limiting frame 313 on the opposite sides of the rotating disc 432 to limit the reciprocating movement of the driving frame 42 along the length direction thereof.

[0031] The limiting frame 313 of the application prevents the driving frame 42 from tilting, warping or being interferingly stuck with the rotating disc 432, the fixed column 312 and other components due to uneven force, thereby ensuring smooth and unobstructed reciprocating movement each time.

[0032] With reference to Figure 1 Preferably, the device further comprises a lead screw sliding table mechanism 8 to move the workbench 1 towards the position below the lifting platform 2, and a linear driver 9 to drive the lifting platform 2 to ascend and descend.

[0033] The lead screw sliding table and the linear driver 9 of the application are prior arts, the workbench 1 is installed on the lead screw sliding table, and the rotation of the lead screw is driven by a motor, so that the conveying of the workbench 1 is realized, the lifting platform 2 is arranged at the output end of the linear driver 9, and the lifting platform 2 is driven to ascend and descend through the extension and retraction of the linear driver 9, which is a prior art, and will not be described here.

[0034] With reference to Figure 4 and Figure 5: Preferably, the visual detection system 5 comprises: an industrial camera 51 arranged inside the installation housing 21, and the camera end thereof is provided with a light source 511; a communication module 52 arranged on the lifting platform 2, for transmitting the images of the second rotating gear 32 before and after rotation collected by the industrial camera 51 to the control system.

[0035] The industrial camera 51 of the present application is a high-resolution, high-frame-rate CCD or CMOS camera, the image processing unit adopts a sub-pixel precision matching algorithm based on tooth surface feature points or preset marker points to calculate the actual angular displacement of the detected gear, the communication module 52 is an RS, 485 communication protocol, which is not described in detail here; high resolution provides dense scales, and sub-pixel algorithm allows calculation between scales, the combination of the two enables the system to detect a tiny displacement far smaller than the physical size represented by one pixel, and converts the micron-level tooth side gap into a pixel displacement that can be accurately calculated on the image.

[0036] Referring to Figure 6 and Figure 7 : Preferably, the gear box 11 is coaxially provided with a rotation-stopping sleeve 112 at one end of the gear box 11, and a positioning hole 111 is vertically arranged through the rotation-stopping sleeve 112, a positioning pin 113 matched with the rotation-stopping sleeve 112 is detachably arranged in the positioning hole 111, and a through hole 1131 is arranged at the lower end of the positioning pin 113, and the device further comprises a pin pulling mechanism 6 for pulling out the positioning pin 113.

[0037] After the positioning pin 113 is inserted, each gear inside the gear box 11 cannot rotate and is in a state capable of engaging with each set of first rotating gears 31 and second rotating gears 32; the rotation-stopping sleeve 112 is coaxially fixedly installed at the shaft end of any one gear inside the gear box 11 that needs to be detected, and is usually matched with the positioning pin 113 through a key groove; since the gears inside the gear box 11 are all in meshing rotation, any one gear cannot rotate, and all gears will be fixed to facilitate the initial engagement with the first rotating gears 31 and the second rotating gears 32.

[0038] Referring to Figure 2 and Figure 3 : Preferably, the pin pulling mechanism 6 comprises: a mounting frame 61 arranged outside the installation housing 21; a second elastic member 62 and a pin pulling rod 63, the pin pulling rod 63 is horizontally and telescopically arranged on the mounting frame 61 through the second elastic member 62, and a plurality of guide rods 65 are arranged horizontally through the mounting frame 61 on the pin pulling rod 63; a guide slide 64 arranged on the rotation-stopping sleeve 112 for guiding the pin pulling rod 63 to pull out the positioning pin 113.

[0039] The whole of the guide chute 64 is trapezoidal in shape and arranged vertically. The pin 63 is arranged obliquely downward near one end of the positioning pin 113. The size of the hole 1131 is larger than that of the head of the pin 63. During the lifting process, the pin 63 will be extended into the hole 1131 of the positioning pin 113. When the pin 63 is separated from the guide chute 64, the pin 63 will be pulled out of the positioning hole 111 under the action of the lifting platform 2. At this time, the first rotating gear 31 and the second rotating gear 32 are engaged with the gears inside the gear box 11 and can drive the rotation thereof. When the lifting platform 2 rises, the pin 63 still extends along the guide chute 64 and does not hinder the resetting of the lifting platform 2.

[0040] With reference to Figure 1 and Figure 5 : Preferably, the device further comprises a second driving motor 7 for driving any one of the first rotating gear 31 or the second rotating gear 32 to rotate.

[0041] The second driving motor 7 is a stepping motor controlled by an encoder. The combination of the stepping motor and the encoder realizes digital precise control, which can accurately control the rotation of the first rotating gear 31 and the second rotating gear 32, thereby driving each gear inside the gear box 11 to rotate synchronously, and then driving each group of the first rotating gear 31 and the second rotating gear 32 to rotate synchronously. According to the detection of the smallest gear in the gear box 11 by the visual detection system 5, the rotation angle of the first rotating gear 31 and the second rotating gear 32 is controlled by the stepping motor and the encoder, so as to ensure that all the gear teeth inside the gear box 11 can be detected.

[0042] With reference to Figure 12 : A method for detecting the gap between gears inside a gear box, comprising the following steps: S1, lifting the upper cover of the gear box 11 to be detected to expose the internal gear pair, and then fixing the gear box 11 on the workbench 1; S2, inserting the positioning pin 113 into the positioning hole 111 to prevent the gear pair inside the gear box 11 from rotating; S3, moving the workbench 1 to below the lifting platform 2, starting the lifting platform 2 to descend, and covering the gear box 11 with the installation housing 21, and making the first rotating gear 31 and the second rotating gear 32 in the superposition state engage with the gears inside the gear box 11; S4, driving the second rotating gear 32 to rotate along the direction of the arc-shaped groove 311 by reciprocating the driving frame 42 until it is in a stable state; S5, the visual detection system 5 collects the photos of the angular displacement relationship between the first rotating gear 31 and the second rotating gear 32 before and after the rotation of the second rotating gear 32, and uploads them to the control system; S6, the control system processes the collected images, uses tooth profile edge extraction or feature point matching technology to accurately identify the angular displacement of the second rotating gear 32, compares the angular displacement value with the pre-set qualified range, and outputs the detection result; S7, judge whether all the teeth of the gear inside the gear box 11 are detected, if yes, move the workbench 1 to the next work flow, if not, continue step S8; S8, drive the second rotating gear 32 to rotate along the arc-shaped groove 311 direction through the reciprocating movement of the driving frame 42, until the first rotating gear 31 and the second rotating gear 32 are in the overlapping state, then start the second driving motor 7 to drive the first rotating gear 31 and the second rotating gear 32 to rotate synchronously, until the next group of teeth of the smallest diameter gear inside the gear box 11 is in meshing state, and return to step S5.

[0043] The device provided by the application is used as follows: first, the gear box 11 is opened to expose the internal gear pair, and the box body is accurately fixed on the workbench 1, then the positioning pin 113 is inserted, and the gear transmission linkage characteristics are used to lock all gears of the entire gear box 11 at a certain angle position, which ensures that the starting point of the meshing of the detection gear and the gear of the gear box 11 is completely consistent each time detection is performed, and fundamentally eliminates the randomness of the position caused by the free rotation of the gear, thereby facilitating the initial meshing with the first rotating gear 31 and the second rotating gear 32, the lifting platform 2 is lowered, the first rotating gear 31 and the second rotating gear 32 in the “coincidence state” are accurately meshed with the gears of the gear box 11 which have been locked, at the same time, the pin pulling rod 63 will be extended along the guide slide 64 during the lowering process, when the pin pulling rod 63 is separated from the guide slide 64, the pin pulling rod 63 will be extended into the positioning pin 113 hole 1131, and the pin pulling rod 63 will be pulled out of the positioning hole 111 under the action of the lifting platform 2, at this time, the first rotating gear 31 and the second rotating gear 32 are meshed with the gears inside the gear box 11, and can be rotated by the second driving motor 7, then the first driving motor 431 is started to drive the rotating disc 432 to rotate, thereby driving the driving frame 42 to reciprocate through the cooperation of the second clamping column 433 and the strip-shaped groove 421, due to the existence of the gear side gap, the second rotating gear 32 or the first rotating gear 31 will first “idle” through this side gap, which is manifested as the sliding of the arc-shaped groove 311 relative to the first clamping column 321, due to the existence of the second driving motor 7, the entire gear set is in a locked state, and the first rotating gear 31 or the second rotating gear 32 will fill this side gap, the high-resolution industrial camera 51 collects images before and after rotation to capture the actual angular displacement of the second rotating gear 32, the control system calculates the accurate actual angular displacement θ through the sub-pixel precision image algorithm, and compares it with the qualified range of angle θ, and then makes a qualification judgment, the second driving motor 7 is started to drive the first rotating gear 31 and the second rotating gear 32 to rotate synchronously until the next set of teeth of the smallest diameter gear inside the gear box 11 is in the meshing state, and the operation is repeated until the detection of all teeth inside the gear box 11 is completed.

[0044] The preferred embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the application within the technical concept of the application, and these simple modifications all belong to the protection scope of the application.

[0045] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the application will not describe various possible combinations again.

[0046] Furthermore, the various embodiments of the present application can be combined with each other, as long as it does not violate the spirit of the present application, and it should be considered as disclosed in the present application.

Claims

1. A gear box internal gear clearance detection device, characterized by, The utility model relates to a gear side gap detection device, including: Workbench (1), the workbench (1) is detachably provided with the gear box (11) to be detected;Lifting platform (2), the lifting platform (2) is liftablely arranged above workbench (1), and the lower end is provided with the mounting shell (21) that is adapted to the gear box (11) shell;Gear side gap detection assembly (3) and drive mechanism (4), the mounting shell (21) is provided with a plurality of gear side gap assemblies that are one-to-one corresponding with each gear inside the gear box (11);Wherein, the gear side gap detection assembly (3) includes coaxially arranged first rotating gear (31) and second rotating gear (32), the first rotating gear (31) is coaxially provided with arc slot (311), the second rotating gear (32) is provided with the first clamping column (321) that is adapted to arc slot (311), and is rotatably arranged in arc slot (311) through drive mechanism (4);Visual detection system (5), the mounting shell (21) is also provided with the visual detection system (5) that is one-to-one corresponding with each gear side gap detection assembly (3);Control system, the control system is used to receive the image that visual detection system (5) transmits, and the actual rotation angle theta of second rotating gear (32) is identified and calculated through image processing.

2. The gearbox internal gear backlash detection apparatus of claim 1, wherein, The drive mechanism (4) includes: first elastic member (41), the first rotating gear (31) is located on one side of arc slot (311) and is provided with fixed column (312), one end of first elastic member (41) is sleeved on first clamping column (321), and the other end is sleeved on fixed column (312);Driving frame (42), the outer end of driving frame (42) is triangular, and the opposite two side walls are respectively abutted on fixed column (312) and first clamping column (321);Reciprocating assembly (43), the reciprocating assembly (43) is used to drive driving frame (42) to reciprocate along the length direction thereof.

3. A gearbox internal gear backlash detection device according to claim 2, characterised in that, The reciprocating assembly (43) includes: first drive motor (431) and rotating disc (432), the first drive motor (431) is arranged inside the first rotating gear (31), and the output end is coaxially provided with rotating disc (432), the rotating disc (432) is provided with second clamping column (433) deviated from the axis, and the middle of driving frame (42) is provided with strip-shaped slot (421) that is adapted to second clamping column (433).

4. The gearbox internal gear backlash detection apparatus of claim 3, wherein, The first rotating gear (31) is provided with limiting frame (313) on the opposite sides of rotating disc (432) to ensure that driving frame (42) reciprocates along the length direction thereof.

5. The gear box internal gear gap detection device of claim 1, wherein, The device further includes screw slide mechanism (8) for moving workbench (1) towards the lower part of lifting platform (2) and linear driver (9) for lifting lifting platform (2).

6. The gear box internal gear gap detection device of claim 1, wherein, The visual detection system (5) comprises an industrial camera (51) arranged inside a mounting shell (21) and provided with a light source (511) at a camera end thereof; and a communication module (52) arranged on the lifting platform (2) and used to transmit images of the industrial camera (51) before and after the second rotating gear (32) rotates to the control system.

7. The gear box internal gear gap detection device of claim 1, wherein, A rotation-stopping sleeve (112) is coaxially arranged at one end of the gear box (11) where any gear inside the gear box (11) extends out, and a positioning hole (111) is vertically arranged through the rotation-stopping sleeve (112), and a positioning pin (113) matched with the rotation-stopping sleeve (112) is detachably arranged in the positioning hole (111), and a through hole (1131) is arranged at a lower end of the positioning pin (113), and the device further comprises a pin pulling mechanism (6) used to pull out the positioning pin (113).

8. A gearbox internal gear backlash detection device according to claim 7, characterised in that, The pin pulling mechanism (6) comprises a mounting frame (61) arranged outside the mounting shell (21), a second elastic member (62), and a pin pulling rod (63), the pin pulling rod (63) is horizontally and telescopically arranged on the mounting frame (61) through the second elastic member (62), and a plurality of guide rods (65) are horizontally arranged through the mounting frame (61) on the pin pulling rod (63); and a guide slide (64) is arranged on the rotation-stopping sleeve (112) and used to guide the pin pulling rod (63) to pull out the positioning pin (113).

9. The gear box internal gear gap detection device of claim 1, wherein, The device further comprises a second driving motor (7) used to drive any first rotating gear (31) or second rotating gear (32) to rotate.

10. A method of detecting inter-gear clearance in a gearbox, characterised by, The device comprises the following steps: S1, the upper cover of the gear box (11) to be detected is opened, and the internal gear pair is exposed, and then the gear box (11) is fixed on the workbench (1); S2, the positioning pin (113) is inserted into the positioning hole (111) to prevent the gear pair inside the gear box (11) from rotating; S3, the workbench (1) is moved to below the lifting platform (2), the lifting platform (2) is started to descend, the mounting shell (21) is arranged on the gear box (11), and the first rotating gear (31) and the second rotating gear (32) in the coincident state are engaged with the gears inside the gear box (11); S4, the second rotating gear (32) is driven to rotate along the direction of the arc-shaped groove (311) through the reciprocating movement of the driving frame (42) until it is in a stable state; S5, the visual detection system (5) collects photos of the angular displacement relationship formed between the first rotating gear (31) and the second rotating gear (32) before and after the second rotating gear (32) rotates, and uploads the photos to the control system; S6, the control system processes the collected images, accurately identifies the angular displacement of the second rotating gear (32) by using tooth profile edge extraction or feature point matching technology, compares the angular displacement value with a preset qualified range, and outputs a detection result; S7, whether all the teeth of the gears inside the gear box (11) are detected is determined, if yes, the workbench (1) is moved to the next work process, and if not, step S8 is continued. S8, by driving the reciprocating movement of the frame (42) to drive the second gear (32) along the direction of the arc-shaped slot (311) rotation, until the first gear (31) and the second gear (32) are in the state of coincidence, then start the second drive motor (7) to drive the first gear (31) and the second gear (32) synchronous rotation, until the next group of teeth with the smallest diameter gear inside the gear box (11) is in meshing state, and return to step S5.

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