Automobile gear pitch error detection device and method

Abstract

The application discloses a kind of automobile gear pitch error detection device and method, it is related to gear detection technical field, it includes detection gear and adjusting component, the detection gear includes rotating wheel, fixed tooth, movable block, double-end telescopic rod and detection tube, the rotating wheel is fixedly connected fixed tooth, fixed tooth is opened with installation groove, movable block is slidably connected in installation groove inner wall, movable block is provided with two, two movable blocks are fixedly connected double-end telescopic rod, and double-end telescopic rod is fixedly connected detection tube.Can be detected to the error of the tooth top pitch, tooth middle pitch and tooth root pitch of the gear to be detected simultaneously, detection is more convenient, only needs to drive the gear to be detected to rotate slowly, without needing to change the position of detection device every group of pitch is measured, is favorable for improving detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of gear inspection technology, and in particular to a device and method for detecting gear pitch error in automobiles. Background Technology

[0002] Spur gears are an important type of gear in mechanical gears, and spur gear transmission is the most widely used transmission structure in both traditional and modern mechanical motion. It features smooth transmission and high efficiency. Furthermore, the gear parameters and diameter can be designed to meet the requirements of various working conditions. During gear meshing, spur gear mechanisms experience a large tangential relative sliding velocity along the tooth length, resulting in significant wear. On the other hand, the point contact between the two gear tooth profiles causes the contact stress to prematurely indent the curved surface, accelerating tooth wear. Simultaneously with gear meshing, gear transmission is prone to impact phenomena. Impact loads affect gear transmission, meshing, lifespan, and noise, thus impacting machining accuracy.

[0003] Currently, Chinese invention application number 202010690703.7 discloses a gear pitch detection device. Although the gear to be detected is slightly adjusted in the horizontal direction by the fixed and moving gear structure, and the tooth span and pitch detector is slightly moved 360 degrees in the horizontal and vertical directions by the fixed and moving detection structure, the phenomenon of human error during the detection process can be avoided. However, the errors of the tooth tip pitch, tooth middle pitch and tooth root pitch of the gear need to be detected separately, which is inconvenient. Summary of the Invention

[0004] The technical problem to be solved by this invention is that the errors of the tooth tip pitch, tooth middle pitch and tooth root pitch on the gear need to be detected separately, which is inconvenient.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automotive gear pitch error detection device, comprising a detection gear and an adjustment assembly. The detection gear includes a rotating wheel, a fixed tooth, a movable block, a double-headed telescopic rod, and a detection tube. The rotating wheel is fixedly connected to the fixed tooth, and the fixed tooth has an installation groove. The movable block is slidably connected to the inner wall of the installation groove. Two movable blocks are provided, and the two movable blocks are respectively fixedly connected to the double-headed telescopic rod. The double-headed telescopic rod is fixedly connected to the detection tube. The adjustment assembly includes a first rotating shaft, a second rotating shaft, a base, and a slider. One end of the first rotating shaft is fixedly connected to the rotating wheel, and the other end of the first rotating shaft is rotatably connected to the base. The base has a sliding groove, and the slider is slidably connected to the inner wall of the sliding groove. The slider is rotatably connected to the bottom of the second rotating shaft.

[0006] As a preferred embodiment of the automotive gear pitch error detection device of the present invention, the fixed tooth is provided with three sets of mounting slots, and the movable block, the double-headed telescopic rod and the detection tube are respectively provided with three sets of mounting slots.

[0007] In a preferred embodiment of the automotive gear pitch error detection device of the present invention, the inner wall of the slide groove is provided with a limiting groove, and the two sides of the slider are provided with limiting blocks corresponding to the limiting groove, and the limiting blocks are slidably connected to the inner wall of the limiting groove.

[0008] In a preferred embodiment of the automotive gear pitch error detection device of the present invention, springs are respectively provided on both sides of the double-headed telescopic rod, and movable blocks are fixedly connected to both ends of the springs.

[0009] In a preferred embodiment of the automotive gear pitch error detection device of the present invention, the double-headed telescopic rod includes a fixed cylinder, a first movable rod, a movable plate, and a sealing ring. The outer wall of the fixed cylinder is fixedly connected to the inner wall of the mounting groove, and the inner wall of the fixed cylinder is slidably connected to the movable plate. A sealing ring is provided at the contact position between the movable plate and the inner wall of the fixed cylinder. The movable plate is fixedly connected to one end of the first movable rod, and the other end of the first movable rod extends out of the fixed cylinder and is fixedly connected to a movable block. The fixed cylinder is fixedly connected to one end of the detection tube.

[0010] As a preferred embodiment of the automotive gear pitch error detection device of the present invention, it further includes a drive assembly, which includes a lead screw, a first gear, a second gear, a telescopic member, a first bevel gear, and a second bevel gear. The lead screw is rotatably connected to a base and threadedly connected to a slider. One end of the lead screw passes through the base and is fixedly connected to the first gear. The first gear meshes with the second gear. The second gear is fixedly connected to one end of the telescopic member, and the other end of the telescopic member is fixedly connected to the first bevel gear. The first bevel gear meshes with the second bevel gear, and the second bevel gear is fixedly connected to a second rotating shaft.

[0011] As a preferred embodiment of the automotive gear pitch error detection device of the present invention, it further includes a locking assembly, which comprises a tee head, a first connecting pipe, a second connecting pipe, a third connecting pipe, a telescopic rod, and a retaining ring. The tee head is connected to one end of the first connecting pipe and the second connecting pipe, the other end of the first connecting pipe is connected to one end of the third connecting pipe, and the other end of the third connecting pipe is connected to one end of the telescopic rod. The telescopic rod is fixedly installed on the inner wall of the receiving cavity opened inside the base, and the other end of the telescopic rod is fixedly connected to the retaining ring. The retaining ring is slidably connected to the inner wall of the receiving cavity, and the retaining ring is semi-circular. Anti-slip texture is provided on the side of the retaining ring near the lead screw.

[0012] In a preferred embodiment of the automotive gear pitch error detection device of the present invention, the telescopic component includes a fixed rod, a second movable rod, and a third movable rod. The fixed rod has a first groove and a second groove. The inner wall of the first groove is slidably connected to one end of the second movable rod, and the other end of the second movable rod is fixedly connected to the second gear. The first groove is connected to the end of the first connecting pipe away from the tee head. The second groove is slidably connected to one end of the third movable rod, and the other end of the third movable rod is fixedly connected to the first bevel gear.

[0013] In a preferred embodiment of the automotive gear pitch error detection device of the present invention, a fixing ring and a connecting key are fixedly connected to the second rotating shaft, and the connecting key is disposed above the fixing ring.

[0014] As a preferred embodiment of the automotive gear pitch error detection method of the present invention, wherein:

[0015] Number the fixed teeth;

[0016] Engage the detection gear with the gear being detected;

[0017] Drive the detected gear to rotate;

[0018] When the fixed tooth is fully inserted into the tooth on the gear being tested, record the liquid position inside the detection tube;

[0019] Consult the liquid position and distance table to obtain the tooth pitch value.

[0020] The beneficial effects of the present invention are as follows: By setting three or more sets of mounting slots on the fixed teeth, each set of mounting slots corresponds to the tooth tip, tooth middle and tooth root of the gear being tested, the present invention can simultaneously detect the errors of the tooth tip pitch, tooth middle pitch and tooth root pitch of the gear being tested, making the test more convenient. It only requires driving the gear being tested to rotate slowly, without having to change the position of the testing device for each set of tooth pitch measurements, which helps to improve the testing efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this disclosure.

[0022] Figure 2 This is a schematic diagram of the rotating wheel structure in an embodiment of this disclosure.

[0023] Figure 3 This is a cross-sectional view of the fixed tooth in an embodiment of this disclosure.

[0024] Figure 4 This is a cross-sectional view of the double-headed telescopic rod in an embodiment of this disclosure.

[0025] Figure 5 For the embodiments of this disclosure Figure 1 Enlarged diagram of point A in the middle.

[0026] Figure 6 This is a cross-sectional view of the base in an embodiment of this disclosure.

[0027] Figure 7 This is a cross-sectional view of the fixing rod in an embodiment of this disclosure.

[0028] Figure 8 This is a schematic flowchart of the automotive gear pitch error detection method in the embodiments of this disclosure.

[0029] Reference numerals: Detection gear 1, Rotating wheel 11, Fixed gear 12, Mounting groove 121, Movable block 13, Double-headed telescopic rod 14, Fixed cylinder 141, First movable rod 142, Movable plate 143, Sealing ring 144, Detection tube 15, Spring 16, Adjustment assembly 2, First rotating shaft 21, Second rotating shaft 22, Fixed ring 221, Connecting key 222, Base 23, Slide groove 231, Limiting groove 2311, Slider 24, Limiting block 241 Drive assembly 3, lead screw 31, first gear 32, second gear 33, telescopic component 34, fixed rod 341, second movable rod 342, third movable rod 343, first groove 3411, second groove 3412, first bevel gear 35, second bevel gear 36, locking assembly 4, tee head 41, first connecting pipe 42, second connecting pipe 43, third connecting pipe 44, telescopic rod 45, retaining ring 46, receiving cavity 232, and the gear being tested 5. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] Reference Figures 1 to 7 This embodiment provides an automotive gear pitch error detection device, including a detection gear 1 and an adjustment assembly 2. The detection gear 1 includes a rotating wheel 11, a fixed tooth 12, a movable block 13, a double-headed telescopic rod 14, and a detection tube 15. The rotating wheel 11 is fixedly connected to the fixed tooth 12. The fixed tooth 12 has an installation groove 121. The movable block 13 is slidably connected to the inner wall of the installation groove 121. There are two movable blocks 13. The two movable blocks 13 are respectively fixedly connected to the double-headed telescopic rod 14. The double-headed telescopic rod 14 is fixedly connected to the detection tube 15.

[0033] In this embodiment, preferably, the double-headed telescopic rod 14 is filled with water containing the mixed pigment. The fixed teeth 12 on the rotating wheel 11 mesh with the gear 5 being tested, with the fixed teeth 12 inserted between the teeth on the gear 5. Adjacent teeth on the gear 5 compress the double-headed telescopic rod 14, forcing the water containing the mixed pigment into the detection tube 15. Furthermore, the radial dimension of the detection tube 15 is much smaller than the radial dimension of the double-headed telescopic rod 14. After the double-headed telescopic rod 14 forces the water containing the mixed pigment into the detection tube 15, the detection tube 15 is provided with graduation lines, through which the position of the water containing the mixed pigment is read.

[0034] Furthermore, the calipers are pre-adjusted to various length positions, and the double-ended telescopic rod 14 is locked in the middle of the calipers. At this point, the position of the mixed pigment water inside the detection tube 15 is the length indicated on the calipers. Based on the maximum and minimum tooth pitch values, the detection length of the caliper teeth is set, and the maximum allowable tooth pitch value is recorded. The position of the mixed pigment water inside the detection tube 15 is taken as the first position, and the minimum allowable tooth pitch value is recorded. The position of the mixed pigment water inside the detection tube 15 is taken as the second position. The area where the mixed pigment water inside the detection tube 15 is located between the first and second positions indicates that the tooth pitch is within the allowable error range.

[0035] The adjustment assembly 2 includes a first rotating shaft 21, a second rotating shaft 22, a base 23, and a slider 24. One end of the first rotating shaft 21 is fixedly connected to a rotating wheel 11, and the other end of the first rotating shaft 21 is rotatably connected to the base 23. A groove 231 is provided on the base 23, and the slider 24 is slidably connected to the inner wall of the groove 231. The slider 24 is rotatably connected to the bottom of the second rotating shaft 22.

[0036] Preferably, in this embodiment, when the rotating wheel 11 rotates, it can drive the first rotating shaft 21 to rotate on the base 23, and the first rotating shaft 21 can support the rotating wheel 11. In use, the gear to be tested 5 is fixed on the second rotating shaft 22, and the second rotating shaft 22 is driven to rotate. The second rotating shaft 22 can drive the gear to be tested 5 to rotate, and the gear to be tested 5 drives the rotating wheel 11 to rotate. At the meshing position of the gear to be tested 5 and the rotating wheel 11, the fixing tooth 12 is inserted into the middle of the teeth on the gear to be tested 5, and the adjacent teeth on the gear 5 compress the double-headed telescopic rod 14. The double-headed telescopic rod 14 will... The water of the mixed pigment is squeezed into the detection tube 15. The tooth pitch error of the detection gear 5 is determined based on the position of the water of the mixed pigment inside the detection tube 15. By setting three or more sets of mounting grooves 121 on the fixed tooth 12, each set of mounting grooves 121 is set to the tooth tip, tooth middle and tooth root of the gear 5 being tested, the tooth tip pitch, tooth middle pitch and tooth root pitch error of the gear 5 being tested can be detected simultaneously. The detection is more convenient. It is only necessary to drive the gear 5 being tested to rotate slowly. There is no need to change the position of the detection device for each set of tooth pitch measurements, which helps to improve the detection efficiency.

[0037] By controlling the slider 24 to slide on the inner wall of the groove 231, the distance between the first rotating shaft 21 and the second rotating shaft 22 can be changed, which facilitates the detection of gears 5 of different sizes.

[0038] Example 2

[0039] Reference Figures 1 to 7 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that...

[0040] Reference Figure 2 and Figure 3 The fixed tooth 12 has three sets of mounting slots 121, and the movable block 13, the double-headed telescopic rod 14 and the detection tube 15 are respectively provided with three sets of mounting slots 121.

[0041] In this preferred embodiment, by setting three or more sets of mounting slots 121 on the fixed tooth 12, each set of mounting slots 121 is respectively set for the tooth tip, tooth middle and tooth root of the gear 5 to be tested, the error of the tooth tip pitch, tooth middle pitch and tooth root pitch of the gear 5 to be tested can be detected simultaneously, making the detection more convenient. It is only necessary to drive the gear 5 to be tested to rotate slowly, without having to change the position of the detection device for each set of tooth pitches, which helps to improve the detection efficiency.

[0042] Reference Figure 5 The inner wall of the slide groove 231 is provided with a limiting groove 2311, and the two sides of the slider 24 are provided with limiting blocks 241 corresponding to the limiting groove 2311. The limiting blocks 241 are slidably connected to the inner wall of the limiting groove 2311.

[0043] In this preferred embodiment, the cooperation between the limiting block 241 and the limiting groove 2311 helps to improve the stability of the slider 24 sliding on the inner wall of the groove 231.

[0044] Reference Figure 3 The double-headed telescopic rod 14 is provided with springs 16 on both sides, and the two ends of the springs 16 are fixedly connected to movable blocks 13.

[0045] In this preferred embodiment, the compressed movable block 13 can be pushed back to its original position under the elastic force of the spring 16.

[0046] Reference Figure 3The double-headed telescopic rod 14 includes a fixed cylinder 141, a first movable rod 142, a movable plate 143, and a sealing ring 144. The outer wall of the fixed cylinder 141 is fixedly connected to the inner wall of the mounting groove 121, and the inner wall of the fixed cylinder 141 is slidably connected to the movable plate 143. A sealing ring 144 is provided at the contact position between the movable plate 143 and the inner wall of the fixed cylinder 141. One end of the movable plate 143 is fixedly connected to the first movable rod 142, and the other end of the first movable rod 142 extends out of the fixed cylinder 141. The other end of the first movable rod 142 is fixedly connected to the movable block 13, and one end of the fixed cylinder 141 is fixedly connected to the detection tube 15.

[0047] In this preferred embodiment, when the first movable rod 142 moves, it can push the movable plate 143 to move. The sealing ring 144 helps to improve the sealing of the inner wall of the fixed cylinder 141. Water mixed with pigment is injected between the two movable plates 143. When the first movable rod 142 is squeezed, the first movable rod 142 pushes the movable plate 143 to move, and the water mixed with pigment is squeezed into the detection tube 15. The tooth pitch error of the detection gear 5 is determined according to the position of the water mixed with pigment inside the detection tube 15.

[0048] Reference Figure 1 and Figure 5 It also includes a drive assembly 3, which includes a lead screw 31, a first gear 32, a second gear 33, a telescopic member 34, a first bevel gear 35, and a second bevel gear 36. The lead screw 31 is rotatably connected to the base 23 and threadedly connected to the slider 24. One end of the lead screw 31 passes through the base 23 and is fixedly connected to the first gear 32. The first gear 32 meshes with the second gear 33. The second gear 33 is fixedly connected to one end of the telescopic member 34, and the other end of the telescopic member 34 is fixedly connected to the first bevel gear 35. The first bevel gear 35 meshes with the second bevel gear 36, and the second bevel gear 36 is fixedly connected to the second rotating shaft 22.

[0049] In this preferred embodiment, the existing electric motor is connected to the second gear 33. When the electric motor is working, it drives the second gear 33 to rotate. The second gear 33 drives the first gear 32 and the telescopic member 34 to rotate. When the first gear 32 rotates, it drives the lead screw 31 to rotate. Under the action of the thread, the slider 24 can move along the length direction of the lead screw 31. The slider 24 slides on the inner wall of the groove 231, which can change the distance between the first rotating shaft 21 and the second rotating shaft 22, making it convenient to detect gears 5 of different sizes. When the telescopic member 34 rotates, it can drive the first bevel gear 35 to rotate. The first bevel gear 35 drives the second bevel gear 36 to rotate, the second bevel gear 36 drives the second rotating shaft 22 to rotate, the second rotating shaft 22 drives the gear under test 5 to rotate, and the gear under test 5 drives the rotating wheel 11 to rotate. At the meshing position of the gear under test 5 and the rotating wheel 11, the fixed tooth 12 is inserted into the middle of the teeth on the gear under test 5. The adjacent teeth on the gear 5 compress the double-headed telescopic rod 14. The double-headed telescopic rod 14 squeezes the water of the mixed pigment inside into the detection tube 15. Based on the position of the water of the mixed pigment inside the detection tube 15, the tooth pitch error of the detection gear 5 is determined.

[0050] Reference Figure 1 and Figure 5 The system includes a locking assembly 4, which comprises a tee head 41, a first connecting pipe 42, a second connecting pipe 43, a third connecting pipe 44, a telescopic rod 45, and a retaining ring 46. The tee head 41 is connected to one end of the first connecting pipe 42 and the second connecting pipe 43, and the other end of the first connecting pipe 42 is connected to one end of the third connecting pipe 44. The other end of the third connecting pipe 44 is connected to one end of the telescopic rod 45. The telescopic rod 45 is fixedly installed on the inner wall of the receiving cavity 232 inside the base 23. The other end of the telescopic rod 45 is fixedly connected to the retaining ring 46. The retaining ring 46 is slidably connected to the inner wall of the receiving cavity 232 and is semi-circular. The retaining ring 46 has anti-slip texture on the side near the lead screw 31.

[0051] In this preferred embodiment, the retaining ring 46 has anti-slip texture on the side near the lead screw 31. When the retaining ring 46 engages the lead screw 31, it helps to increase its friction and prevent the lead screw 31 from rotating. Connecting an existing suction pump to the tee head 41, the negative pressure generated by the suction pump acts on the tee head 41 and, through the first connecting pipe 42 and the third connecting pipe 44, on the telescopic rod 45. At this time, the telescopic rod 45 retracts, causing the retaining ring 46 to move. The retaining ring 46 releases the lead screw 31, allowing it to rotate.

[0052] Reference Figure 7The telescopic component 34 includes a fixed rod 341, a second movable rod 342, and a third movable rod 343. The fixed rod 341 has a first groove 3411 and a second groove 3412. The inner wall of the first groove 3411 is slidably connected to one end of the second movable rod 342, and the other end of the second movable rod 342 is fixedly connected to the second gear 33. The first groove 3411 is connected to the end of the first connecting pipe 42 away from the tee head 41. The second groove 3412 is slidably connected to one end of the third movable rod 343, and the other end of the third movable rod 343 is fixedly connected to the first bevel gear 35.

[0053] Preferably, in this embodiment, the fixed rod 341, the second movable rod 342, and the third movable rod 343 have square cross-sections to prevent relative rotation between the fixed rod 341 and the second and third movable rods 342 and 343. An existing suction pump is connected to the three-way connector 41. The negative pressure generated by the suction pump during air extraction acts on the three-way connector 41 and, through the first connecting pipe 42 and the third connecting pipe 44, on the telescopic rod 45. At this time, the telescopic rod 45 retracts, causing the retaining ring 46 to move. The retaining ring 46 releases the lead screw 31, allowing the lead screw 31 to rotate. Simultaneously, the negative pressure acts on the second connecting pipe 43 and, through the second connecting pipe 43, on the inside of the first groove 3411. At this time, the second movable rod 342 retracts into the first groove 3411, driving the second gear 33 to move. The second gear 33 then meshes with the first gear 32.

[0054] The second gear 33 rotates, driving the first gear 32 and the telescopic component 34 to rotate. When the first gear 32 rotates, it drives the lead screw 31 to rotate. Under the action of the thread, the slider 24 can move along the length of the lead screw 31. The slider 24 slides on the inner wall of the groove 231, which can change the distance between the first rotating shaft 21 and the second rotating shaft 22, making it convenient to test gears 5 of different sizes. After the slider 24 reaches the predetermined position, the motor is turned off, and air is pumped into the three-way head 41 by the suction air pump. The air is then pumped onto the telescopic rod 45 through the first connecting pipe 42 and the third connecting pipe 44. At this time, the telescopic rod 45 extends, driving the retaining ring 46 to move. The retaining ring 46 locks onto the lead screw 31, locking the position of the lead screw 31. At this time, the lead screw 31 cannot rotate, thus locking the position of the slider 24 and locking the distance between the first rotating shaft 21 and the second rotating shaft 22, improving the accuracy of the test, and making it convenient to adjust the distance between the first rotating shaft 21 and the second rotating shaft 22, which is convenient for testing gears 5 of different sizes.

[0055] While the suction pump pumps air into the three-way connector 41, the gas acts on the inside of the first groove 3411 through the second connecting pipe 43. At this time, the second movable rod 342 retracts into the first groove 3411, and the second movable rod 342 drives the second gear 33 to move. At this time, the second gear 33 disengages from the first gear 32. The rotation of the second gear 33 cannot drive the first gear 32 to rotate, so as to avoid the lead screw 31 from rotating when driving the second rotating shaft 22 to rotate.

[0056] Reference Figure 1 A fixing ring 221 and a connecting key 222 are fixedly connected to the second rotating shaft 22, and the connecting key 222 is located above the fixing ring 221.

[0057] In this embodiment, the fixing ring 221 is preferably used to support the gear 5 under test. When fixing the gear 5 under test, the keyway on the gear 5 under test is engaged with the connecting key 222 to complete the fixing of the gear 5 under test.

[0058] Example 3

[0059] Reference Figure 8 This embodiment is based on the previous embodiment, but differs in that it discloses a method for detecting gear pitch error in automobiles, including:

[0060] S1: Number the fixed teeth 12;

[0061] S2: Engage the detection gear 1 with the gear 5 being detected;

[0062] S3: Drive the detected gear 5 to rotate;

[0063] S4: When the fixed tooth 12 is fully inserted into the tooth on the gear 5 being tested, record the liquid position inside the detection tube 15;

[0064] S4: Query the liquid position and distance comparison table to obtain the tooth pitch value.

[0065] In this embodiment, preferably, when the size of the gear 5 being tested is large, such as when the rotation ratio between the testing gear 1 and the gear 5 being tested is 4:1, the testing gear 5 rotates 1 revolution and the testing gear 1 rotates 4 revolutions. The fixed teeth 12 are numbered, which makes it easier to record the position of the testing tube 15 corresponding to the fixed teeth 12 multiple times and to organize the testing data.

[0066] Pre-adjust the calipers to various length positions and lock the double-ended telescopic rod 14 in the middle of the calipers. At this point, the position of the mixed pigment water inside the detection tube 15 is the length indicated on the calipers. Then adjust the vernier position on the calipers (e.g., adjust by 0.1 mm each time) and record the position of the mixed pigment water inside the detection tube 15 to form a liquid position and distance reference table. When the mixed pigment water is at a certain position, the tooth pitch value can be obtained according to the liquid position and distance reference table. The tooth pitch error can be judged based on the tooth pitch value. If the tooth pitch value is within the allowable tooth pitch error, it means that the tooth pitch is qualified; if the tooth pitch value is not within the allowable tooth pitch error, it means that the tooth pitch is qualified.

Claims

1. A device for detecting gear pitch error in automobiles, characterized in that: include The detection gear (1) includes a rotating wheel (11), a fixed tooth (12), a movable block (13), a double-headed telescopic rod (14), and a detection tube (15). The rotating wheel (11) is fixedly connected to the fixed tooth (12). The fixed tooth (12) has an installation groove (121). The movable block (13) is slidably connected to the inner wall of the installation groove (121). There are two movable blocks (13). The two movable blocks (13) are fixedly connected to the double-headed telescopic rod (14) respectively. The double-headed telescopic rod (14) is fixedly connected to the detection tube (15). Adjustment component (2), the adjustment component (2) includes a first rotating shaft (21), a second rotating shaft (22), a base (23) and a slider (24). One end of the first rotating shaft (21) is fixedly connected to a rotating wheel (11), and the other end of the first rotating shaft (21) is rotatably connected to the base (23). A groove (231) is provided on the base (23), and the slider (24) is slidably connected to the inner wall of the groove (231). The slider (24) is rotatably connected to the bottom of the second rotating shaft (22). The fixed tooth (12) is provided with three sets of mounting slots (121), and the movable block (13), the double-headed telescopic rod (14) and the detection tube (15) are respectively provided with three sets of mounting slots (121); The double-headed telescopic rod (14) includes a fixed cylinder (141), a first movable rod (142), a movable plate (143), and a sealing ring (144). The outer wall of the fixed cylinder (141) is fixedly connected to the inner wall of the mounting groove (121), and the inner wall of the fixed cylinder (141) is slidably connected to the movable plate (143). A sealing ring (144) is provided at the contact position between the movable plate (143) and the inner wall of the fixed cylinder (141). The movable plate (143) is fixedly connected to one end of the first movable rod (142), and the other end of the first movable rod (142) extends out of the fixed cylinder (141). The other end of the first movable rod (142) is fixedly connected to the movable block (13), and the fixed cylinder (141) is fixedly connected to one end of the detection tube (15). It also includes a drive assembly (3), which includes a lead screw (31), a first gear (32), a second gear (33), a telescopic member (34), a first bevel gear (35), and a second bevel gear (36). The lead screw (31) is rotatably connected to the base (23), and the lead screw (31) is threadedly connected to the slider (24). One end of the lead screw (31) passes through the base (23) and is fixedly connected to the first gear (32). The first gear (32) meshes with the second gear (33). The second gear (33) is fixedly connected to one end of the telescopic member (34), and the other end of the telescopic member (34) is fixedly connected to the first bevel gear (35). The first bevel gear (35) meshes with the second bevel gear (36), and the second bevel gear (36) is fixedly connected to the second rotating shaft (22). It also includes a locking assembly (4), which includes a three-way connector (41), a first connecting pipe (42), a second connecting pipe (43), a third connecting pipe (44), a telescopic rod (45), and a retaining ring (46). The three-way connector (41) is connected to one end of the first connecting pipe (42) and the second connecting pipe (43), and the other end of the first connecting pipe (42) is connected to one end of the third connecting pipe (44). The other end of the third connecting pipe (44) is connected to one end of the telescopic rod (45). The telescopic rod (45) is fixedly installed on the inner wall of the receiving cavity (232) opened inside the base (23). The other end of the telescopic rod (45) is fixedly connected to the retaining ring (46). The retaining ring (46) is slidably connected to the inner wall of the receiving cavity (232), and the retaining ring (46) is semi-circular. The retaining ring (46) has anti-slip texture on the side near the lead screw (31).

2. The automotive gear pitch error detection device as described in claim 1, characterized in that: The inner wall of the slide groove (231) is provided with a limiting groove (2311), and the two sides of the slider (24) are provided with limiting blocks (241) corresponding to the limiting groove (2311). The limiting blocks (241) are slidably connected to the inner wall of the limiting groove (2311).

3. The automotive gear pitch error detection device as described in claim 1, characterized in that: The double-headed telescopic rod (14) is provided with springs (16) on both sides, and the two ends of the springs (16) are fixedly connected to movable blocks (13).

4. The automotive gear pitch error detection device as described in claim 1, characterized in that: The telescopic component (34) includes a fixed rod (341), a second movable rod (342), and a third movable rod (343). The fixed rod (341) has a first groove (3411) and a second groove (3412). The inner wall of the first groove (3411) is slidably connected to one end of the second movable rod (342), and the other end of the second movable rod (342) is fixedly connected to the second gear (33). The first groove (3411) is connected to the end of the first connecting pipe (42) away from the tee head (41). The second groove (3412) is slidably connected to one end of the third movable rod (343), and the other end of the third movable rod (343) is fixedly connected to the first bevel gear (35).

5. The automotive gear pitch error detection device as described in claim 1, characterized in that: A fixing ring (221) and a connecting key (222) are fixedly connected on the second rotating shaft (22), and the connecting key (222) is located above the fixing ring (221).

6. A detection method based on the automotive gear pitch error detection device according to claim 1, characterized in that, include: Number the fixed teeth (12); Engage the detection gear (1) with the gear being tested (5); Drive the detected gear (5) to rotate; When the fixed tooth (12) is fully inserted into the tooth on the gear (5) being tested, record the liquid position inside the detection tube (15); Consult the liquid position and distance table to obtain the tooth pitch value.

Images