Gear surface burn detection device

Abstract

The invention discloses a gear surface burn detection device. The gear surface burn detection device comprises a bracket and a female die, the female die has a thickness along a first direction, and the first direction is vertical; the cross section of the female die has an appearance embedded with a to-be-detected gear, the hardness of the female die is smaller than that of the to-be-detected gear, and the female die is made of a plastic material; the support is provided with a transverse bearing face, and the bearing face is at least used for bearing the female die. The support is further provided with a pressing part and a driving part, the pressing part is movably connected with the support, the driving part is in transmission connection with the pressing part, and the driving part is at least used for driving the pressing part to move in the first direction. The gear surface burn detection device provided by the invention has the advantages that the gear burn condition can be conveniently and roughly judged, and the gear does not need to be cleaned firstly during detection.

Description

Technical Field

[0001] The invention belongs to the technical field of gear detection, and in particular relates to a gear surface burn detection device. Background Art

[0002] Gears are one of the key components in the machinery industry. During gear processing or use, due to overload, overspeed, frictional heat, grinding wheel mismatch, improper cutting parameters, poor lubrication and other reasons, local overheating may occur on the gear surface, which is called gear burn.

[0003] Gear surface burns will cause microscopic morphological changes in the local structure of the gear surface. This type of burn usually occurs on the tooth surface of the driving wheel or the tooth root of the driven wheel. It usually appears as charred black, gray-black or brown-black burn marks, accompanied by damage morphology such as grooves and ridges, which seriously affect the surface roughness and dimensional deviation of the gear.

[0004] At present, there are many common methods for detecting gear surface burns:

[0005] ① Observation method: directly observe the burn marks on the gear surface to determine whether there is a burn. The burn area usually has a rough surface. The burn marks on the gear surface can be used to quickly determine whether the gear has obvious burns.

[0006] ② Acid etching method: Different microstructures of steel have different sensitivities to acid etching, and the level of grinding burn is determined by the color after acid etching. The acid etching method usually includes the steps of preparing acid etching solution, pickling, rinsing with clean water, and rust prevention. After pickling, carefully observe the color of the tooth surface. All gray means no grinding burn, black means grinding burn, and they are distinguished according to certain levels.

[0007] ③Surface microhardness test method: Based on the principle that the surface hardness decreases after tempering burn, the microhardness distribution curve of the grinding surface is used as the basis for judging whether grinding burn occurs. The degree of tempering burn is judged by measuring the decrease in surface microhardness and collective hardness. This method is sensitive and the values ​​are reliable.

[0008] ④ Residual stress measurement method: Determine whether there is burn by measuring the residual stress on the gear surface. The burn area usually produces abnormal residual stress distribution.

[0009] ⑤Metallographic detection method: Observe the microstructure changes on the gear surface through a metallographic microscope to determine whether there is burn. The burn area usually has abnormal phenomena such as coarse grains and loose structure.

[0010] ⑥ Magnetoelastic method (Barkhausen noise method): The magnetoelastic effect is used to detect the burn condition of the gear surface. The burn area will cause the magnetoelastic effect to change, thus generating Barkhausen noise.

[0011] However, gear maintenance work is often carried out in factories far away from laboratories. At the maintenance site, the above methods are insufficient in detecting gear surface burn conditions.

[0012] Acid etching, surface microhardness test, residual stress determination, metallographic detection, and magnetoelastic method often need to be carried out in the laboratory with the help of various experimental equipment, but factories are rarely equipped with laboratories. Therefore, the above methods are difficult to adapt to the needs of maintenance sites.

[0013] At the same time, although the acid etching method, surface microhardness test method, residual stress measurement method, metallographic detection method, and magnetoelastic method can obtain detailed information about gear burns, the staff needs to roughly judge the gear burn conditions at the gear maintenance site. The above methods have cumbersome detection processes, long detection times, and high costs, and are not convenient for intuitively and quickly judging the gear burn conditions.

[0014] Although the observation method has the advantages of being intuitive, simple, and not requiring special equipment, it still has the following shortcomings:

[0015] ① Strong subjectivity: The test results of the observation method largely rely on the subjective judgment of the tester. Different testers may have different identification of burn marks, resulting in inconsistent test results.

[0016] ② Difficulty in recording: Different trace changes are difficult to record through simple descriptions, and often require auxiliary recording methods such as photos and videos.

[0017] ③ Affected by light: Light conditions have a significant impact on the detection results of the observation method. In an environment with insufficient light or large changes in light, it may become difficult to identify burn marks, thus affecting the accuracy of the detection.

[0018] ④ Affected by materials: Gears of different materials may show different changes in burn marks after being burned. Therefore, the observation method may not be suitable for the detection of gears of all materials.

[0019] In addition, at the maintenance site, since there is often a large amount of oil and dirt attached to the gears, the gears need to be cleaned and dried before using the above methods for detection, which is not conducive to quickly and conveniently detecting the burn condition of the gear surface; and the cleaning process can easily wash away some of the burn marks on the gears, resulting in unreliable detection results. Summary of the invention

[0020] In view of the deficiencies in the prior art, an object of the present invention is to provide a gear surface burn detection device.

[0021] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention includes:

[0022] A gear surface burn detection device comprises: a bracket and a female mold;

[0023] The female mold has a thickness along a first direction, the first direction being vertical; the cross section of the female mold has an outer shape that fits with the gear to be detected, the hardness of the female mold is less than that of the gear to be detected, and the female mold is made of plastic material;

[0024] The support has a transverse supporting surface, and the supporting surface is at least used to support the female mold;

[0025] The bracket is also provided with a pressing part and a driving part. The pressing part is movably connected to the bracket, and the driving part is transmission-connected to the pressing part. The driving part is at least used to drive the pressing part to move along the first direction.

[0026] In the present invention, the burn condition of the gear surface is detected, the gear to be detected is placed on the female mold and aligned with the female mold, and the driving part drives the pressing part to press the gear, so that the gear can be driven to pass through the female mold; during the process of the gear passing through the female mold, the female mold is always in contact with the gear surface.

[0027] In the present invention, the cross section of the female mold has an outer shape that fits with the gear to be tested, so that the corresponding female mold can be pre-made according to the type of gear to be tested.

[0028] Preferably, the female mold comprises a mold frame, and the mold frame is placed on the supporting surface; the mold frame is provided with a through hole, and the through hole has a length along the first direction, and the diameter of the through hole is equal to the diameter of the gear to be detected;

[0029] The female mold also includes a plurality of mold teeth arranged on the mold frame, the plurality of mold teeth are all located in the through hole and the extension directions of the plurality of mold teeth are parallel to each other; on the cross section of the female mold, the mold frame and the plurality of mold teeth form an outer shape that fits with the gear to be detected.

[0030] Preferably, a perforation is provided on the supporting surface, and the diameter of the perforation is larger than that of the through hole; and the projection of the through hole on the supporting surface along the first direction does not exceed the area where the perforation is located.

[0031] In the present invention, the gear can fall from the perforation after passing through the female die.

[0032] Preferably, a supporting groove is provided on the supporting surface, the through hole is located in the supporting groove and is coaxial with the supporting groove, the female mold has the same diameter as the supporting groove, and the through hole is coaxial with the supporting groove.

[0033] In the present invention, the supporting groove can play a role in automatically positioning the female mold, which is beneficial to reducing the difficulty of using the gear surface burn detection device.

[0034] Preferably, the movement trajectory of the pressing portion passes through the through hole.

[0035] Preferably, the thickness of the female mold is 0.5 cm to 4 cm.

[0036] Preferably, the pressing part includes a pressing rod and a pressing head, the pressing rod is movably connected to the bracket so that the pressing rod can move along the first direction; the pressing head is arranged on the pressing rod, and the pressing head has a pressing surface.

[0037] Preferably, the pressing head is detachably connected to the pressing rod.

[0038] Preferably, the pressing surface has an outer shape that fits with the cross section of the female mold.

[0039] In the present invention, the pressing surface has an outer shape that fits with the cross section of the female mold, which is beneficial for the pressing head to apply pressure evenly to the gear, thereby stably pushing the gear so that the gear passes through the female mold smoothly, thereby facilitating improving detection accuracy.

[0040] Preferably, the pressing surface has the same shape as the gear to be detected.

[0041] In the present invention, the pressing surface has the same shape as the gear to be detected, which is conducive to the pressing head applying pressure to the gear evenly, thereby steadily pushing the gear so that the gear passes through the female mold smoothly, thereby facilitating improving the detection accuracy.

[0042] Preferably, the pressing head is plugged into the pressing rod.

[0043] Preferably, the pressing head is threadedly connected to the pressing rod.

[0044] In the present invention, when it is necessary to detect gears of different sizes, the gears of different models are pressed by replacing the matching pressing heads.

[0045] Compared with the prior art, the advantages of the present invention include:

[0046] (1) The gear surface burn detection device provided by the present invention has a simple structure, is easy to carry, and does not require complex experimental equipment and harsh testing sites;

[0047] (2) The present invention provides a gear surface burn detection device. When the gear to be detected passes through the female mold, the oil stains on the gear surface will be scraped off by the female mold, and a large amount of oil stains will remain on the top of the female mold. The gear to be detected can be directly detected without being cleaned;

[0048] (3) The present invention provides a gear surface burn detection device. When the gear to be detected passes through the female mold, the oil on the gear surface will be scraped off by the female mold, and a large amount of oil will remain on the top of the female mold, which is conducive to reducing the adhesion of oil on the surface of the female mold, thereby facilitating the observation of the number and depth of scratches on the female mold;

[0049] (4) The present invention provides a gear surface burn detection device. After the gear to be detected passes through the female mold, a large amount of oil stains remain on the top of the female mold, and a small amount of oil stains will fill the grooves on the gear, which is conducive to observing the number of grooves on the gear;

[0050] (5) The present invention provides a gear surface burn detection device. When the gear to be detected passes through the female mold, the ridges on the gear will form scratches on the female mold surface, and the grooves on the gear will be filled with oil. By judging the number and depth of the scratches on the female mold and the number of grooves on the gear, the gear surface burn condition can be roughly judged intuitively, simply and quickly;

[0051] (6) The present invention provides a gear surface burn detection device, wherein the cross-section of the female mold has an appearance that fits with the gear to be detected. When it is necessary to detect gears of different models, only the matching female mold needs to be replaced, thereby facilitating the gear surface burn detection device to be suitable for detecting gears of different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 This is an overall schematic diagram of a gear surface burn detection device in Example 1 of the present invention;

[0054] Figure 2 This is a schematic diagram of a partial explosion in Example 1 of the present invention;

[0055] Figure 3 This is a schematic diagram of a partial explosion enlargement in Example 1 of the present invention;

[0056] Figure 4 This is a schematic diagram of the gear to be tested being located in the female mold in Example 1 of the present invention;

[0057] Figure 5 This is a schematic diagram of an enlarged local explosion in Example 2 of the present invention.

[0058] Reference numerals:

[0059] 11. Upper horizontal plate; 12. Vertical plate; 13. Lower horizontal plate; 14. Vertical arm; 15. Horizontal arm; 16. Movable cylinder; 17. Perforation; 18. Supporting groove;

[0060] 21. Pressing rod; 22. Pressing sheet; 23. Spring; 24. Pressing head;

[0061] 31. female mold; 32. mold frame; 33. mold base; 34. mold teeth;

[0062] 41. Gear. DETAILED DESCRIPTION

[0063] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the present invention after long-term research and extensive practice. The following will further explain the technical solution, its implementation process and principle, etc. in conjunction with the drawings in the embodiments of this application and specific implementation cases.

[0064] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, the present invention covers any substitution, modification, equivalent method and scheme made on the spirit, principle and scope of the present invention defined by the claims. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] In the description of the present application, "first", "second", "third" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "an" and other similar words do not indicate a quantity limitation, but indicate the existence of at least one. "Include" or "comprise" and other similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0066] In the description of the present application, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, when using position terms such as both sides, outer side, upper and lower, etc., it should be understood that they are only used for easy understanding and description, considering that the structure may be oriented to other positions.

[0067] In the description of the present application, unless otherwise clearly specified and defined, the technical terms or scientific terms used should have the ordinary meaning understood by those with ordinary skills in the field to which the present application belongs. Terms such as "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a contact connection or an integral connection; for those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to specific circumstances.

[0068] The embodiments of the present invention are intended to introduce and explain the structural composition of the gear surface burn detection device and the cooperation relationship between the various component structures. Unless otherwise specified, the dimensions, materials, manufacturing processes, etc. of the various components suitable for the gear surface burn detection device in the embodiments of the present invention can be selected according to specific circumstances, and no special limitations and explanations are made here.

[0069] Furthermore, in order to enable the public to have a better understanding of the present invention, in the following detailed description of the present invention, some specific detailed parts are described in detail. Those skilled in the art can fully understand the present invention without the description of these detailed parts.

[0070] Embodiment 1

[0071] Please refer to Figure 1 and Figure 2 , a gear surface burn detection device, including a bracket, the bracket having a horizontal supporting surface.

[0072] Specifically, the bracket includes an upper cross plate 11, a vertical plate 12, and a lower cross plate 13 connected in sequence. The upper cross plate 11, the vertical plate 12, and the lower cross plate 13 are connected in sequence to form a U-shape. Both the upper cross plate 11 and the lower cross plate 13 are horizontal, and the top surface of the upper cross plate 11 is the supporting surface.

[0073] Preferably, a perforation 17 is provided on the supporting surface.

[0074] Preferably, a supporting groove 18 is provided on the supporting surface, and the perforation 17 is located in the supporting groove 18 and coaxial with the supporting groove 18.

[0075] Specifically, the upper transverse plate 11 is provided with a concentric supporting groove 18 and a through hole 17 , and the through hole 17 passes through the upper transverse plate 11 .

[0076] In this embodiment, a pressing part and a driving part are also provided on the bracket. The pressing part is movably connected to the bracket, and the driving part is transmission-connected to the pressing part. The driving part is at least used to drive the pressing part to move along a first direction, which is vertical.

[0077] Specifically, in this embodiment, the first direction is a vertical direction.

[0078] Preferably, the pressing portion includes a pressing rod 21, and the pressing rod 21 is movably connected to the bracket so that the pressing rod 21 can move along the first direction.

[0079] Specifically, the bracket further includes a vertical frame, which includes a vertical arm 14 and a horizontal arm 15 connected to each other. The vertical arm 14 is fixedly mounted on the upper horizontal plate 11 , and the horizontal arm 15 extends to above the through hole 17 .

[0080] Specifically, a vertical movable cylinder 16 is provided at the end of the cross arm 15, and the movable cylinder 16 is located above the through hole 17 and coaxial with the through hole 17; the pressing rod 21 passes through the movable cylinder 16 and extends out of the lower end of the movable cylinder 16, so that the pressing rod 21 can move in the movable cylinder 16 along the vertical direction.

[0081] Specifically, in this embodiment, the driving part includes a pressing plate 22 and a spring 23. The pressing plate 22 is fixedly mounted on the upper end of the pressing rod 21. The spring 23 is sleeved on the pressing rod 21. One end of the spring 23 abuts against the pressing plate 22, and the other end abuts against the upper end of the movable cylinder 16.

[0082] In this embodiment, the staff can drive the pressing rod 21 to move toward the through hole 17 by pressing the pressing plate 22 downward; after the staff stops pressing the pressing plate 22, the pressing rod 21 automatically rises away from the through hole 17 under the elastic force of the spring 23.

[0083] In other embodiments, the pressing rod 21 may be driven to move downward by means of a pneumatic cylinder, an electric cylinder, or the like.

[0084] See also Figures 1 to 4 In this embodiment, a gear surface burn detection device also includes a female mold 31, the hardness of the female mold 31 is less than that of the gear 41 to be detected, the female mold 31 is a plastic material, the female mold 31 has a thickness along a first direction, and the supporting surface is at least used to support the female mold 31.

[0085] Specifically, in this embodiment, the female mold 31 is made of polypropylene. In other embodiments, the female mold 31 can also be made of polycarbonate plastic or acrylic ester.

[0086] Preferably, the thickness of the female mold 31 is 0.5 cm to 4 cm.

[0087] Specifically, the female mold 31 has a vertical thickness, and the thickness of the female mold 31 is 0.5 cm, 1 cm, 1.5 cm, 2 cm, 2.5 cm, 3 cm, 3.5 cm or 4 cm.

[0088] Preferably, the female mold 31 includes a mold frame 32, and the mold frame 32 is placed on a supporting surface.

[0089] Preferably, the mold frame 32 is provided with a through hole, the through hole has a length along the first direction, and the through hole is coaxial with the supporting groove 18 .

[0090] Further preferably, the female mold 31 has the same diameter as the supporting groove 18 .

[0091] Specifically, the mold frame 32 has a height, and a mold base 33 is provided at the bottom of the mold frame 32. The mold frame 32 is flush with the mold base 33, and the mold base 33 is coaxial with the through hole. The diameter and thickness of the mold base 33 are the same as the supporting groove 18. When the female mold 31 is placed in the supporting groove 18, the mold base 33 is restricted by the supporting groove 18, and the through hole, the through hole 17, the supporting groove 18, and the pressing rod 21 can be coaxial, thereby realizing automatic positioning of the mold frame 32, which is beneficial to reducing the difficulty of using the gear surface burn detection device.

[0092] Specifically, the height of the formwork 32 is 0.5 cm, 1 cm, 1.5 cm, 2 cm, 2.5 cm, 3 cm, 3.5 cm or 4 cm.

[0093] Further preferably, the movement trajectory of the pressing portion passes through the through hole.

[0094] Specifically, when the pressing rod 21 passes through the through hole and the through hole 17 in sequence and moves downward to the maximum stroke, the lower end of the pressing rod 21 is located below the upper horizontal plate 11 .

[0095] Preferably, the diameter of the through hole is equal to the diameter of the gear 41 to be detected.

[0096] Further preferably, the diameter of the perforation 17 is larger than that of the through hole; and the projection of the through hole on the supporting surface along the first direction does not exceed the area where the perforation 17 is located.

[0097] Specifically, the through hole, the through hole 17, the supporting groove 18, and the pressing rod 21 are coaxial. 承托槽 >R 穿孔 >R 通孔 =R 待检测齿轮 .

[0098] In this embodiment, the cross section of the female mold 31 has an outer shape that fits with the gear 41 to be detected.

[0099] Preferably, the female mold 31 also includes a plurality of mold teeth 34 arranged on the mold frame 32, and the plurality of mold teeth 34 are all located in the through hole and the extension directions of the plurality of mold teeth 34 are parallel to each other; in the cross section of the female mold 31, the mold frame 32 and the plurality of mold teeth 34 form an outer shape that fits with the gear 41 to be detected.

[0100] Specifically, each mold tooth 34 is at the same height as the through hole, and each mold tooth 34 can be embedded in two adjacent teeth on the gear 41 to be detected.

[0101] In this embodiment, the staff detects the gear 41 to be detected in two steps:

[0102] Sampling: first place the lower horizontal plate 13 on a plane, and then place the female mold 31 matching the gear 41 to be tested on the upper horizontal plate 11, so that the mold base 33 of the female mold 31 is embedded in the supporting groove 18; then place the gear 41 to be tested on the female mold 31, and align the gear 41 to be tested with the female mold 31 according to the shape of the female mold 31; then press the pressing plate 22 downward to drive the pressing rod 21 to press the gear 41 to be tested downward, so that the gear 41 to be tested finally falls from the perforation 17.

[0103] Observation: The staff removes the female mold 31 from the upper horizontal plate 11 and observes the number and depth of scratches on the surface of the mold tooth 34; the staff takes out the gear 41 that falls from the perforation 17 and observes the number and size of grooves filled with oil on the surface of the gear 41; finally, by observing the number and depth of scratches on the surface of the mold tooth 34 and the number and size of grooves filled with oil on the surface of the gear 41, a comprehensive and preliminary judgment is made on the burn condition of the gear 41.

[0104] Example 2

[0105] See also Figure 5 The difference between this embodiment and the first embodiment is that the pressing portion further includes a pressing head 24 , the pressing head 24 is disposed on the pressing rod 21 , and the pressing head 24 has a pressing surface.

[0106] Preferably, the pressing surface has an outer shape that fits with the cross section of the female mold 31 .

[0107] Specifically, the bottom surface of the pressing head 24 is a pressing surface, and the pressing surface coincides with the projection of the gear 41 to be detected on the upper horizontal plate 11 .

[0108] Preferably, the pressing surface has the same shape as the gear 41 to be detected.

[0109] Specifically, the pressing surface and the upper surface of the gear to be detected 41 can fit each other.

[0110] Further preferably, the pressing head 24 is detachably connected to the pressing rod 21 .

[0111] Specifically, the pressing head 24 is plugged into the pressing rod 21. In other embodiments, the pressing head 24 is threadedly connected to the pressing rod 21.

[0112] It can be understood that the pressing surface coincides with the projection of the gear 41 to be detected on the upper horizontal plate 11, and the pressing surface and the upper surface of the gear 41 to be detected can fit each other, which is beneficial for the pressing head 24 to apply pressure evenly to the gear 41 to be detected, thereby stably pushing the gear 41 to be detected, so that the gear 41 to be detected can smoothly pass through the female mold 31, which is beneficial to improve the detection accuracy.

[0113] In this embodiment, during the sampling process, the staff places the gear 41 to be tested on the female mold 31 and aligns it with the female mold 31, then adjusts the pressing head 24 so that the pressing head 24 is also aligned with the female mold 31, and then presses the pressing plate 22 downward, so that the gear 41 to be tested finally falls from the perforation 17.

[0114] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, some simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A gear surface burn detection device, characterized in that: include: A support and a female mold (31); The female mold (31) has a thickness along a first direction, the first direction being a vertical direction; a cross section of the female mold (31) has an outer shape that fits with the gear (41) to be detected; the hardness of the female mold (31) is less than that of the gear (41) to be detected; and the female mold (31) is made of a plastic material; The support has a transverse supporting surface, and the supporting surface is at least used to support the female mold (31); The bracket is also provided with a pressing part and a driving part. The pressing part is movably connected to the bracket, and the driving part is transmission-connected to the pressing part. The driving part is at least used to drive the pressing part to move along the first direction.

2. A gear surface burn detection device according to claim 1, characterized in that: The female mold (31) comprises a mold frame (32), and the mold frame (32) is placed on the supporting surface; the mold frame (32) is provided with a through hole, the through hole has a length along a first direction, and the diameter of the through hole is equal to the diameter of the gear (41) to be detected; The female mold (31) further comprises a plurality of mold teeth (34) arranged on the mold frame (32), wherein the plurality of mold teeth (34) are all located in the through hole and the extension directions of the plurality of mold teeth (34) are parallel to each other; in the cross section of the female mold (31), the mold frame (32) and the plurality of mold teeth (34) form an outer shape that fits with the gear (41) to be detected.

3. A gear surface burn detection device according to claim 2, characterized in that: A perforation (17) is provided on the supporting surface, and the diameter of the perforation (17) is larger than the through hole; the projection of the through hole on the supporting surface along the first direction does not exceed the area where the perforation (17) is located.

4. A gear surface burn detection device according to claim 3, characterized in that: A supporting groove (18) is provided on the supporting surface, the through hole (17) is located in the supporting groove (18) and is coaxial with the supporting groove (18), the female mold (31) has the same diameter as the supporting groove (18), and the through hole is coaxial with the supporting groove (18).

5. The gear surface burn detection device according to claim 2, characterized in that: The movement track of the pressing portion passes through the through hole.

6. The gear surface burn detection device according to claim 1, characterized in that: The thickness of the female mold (31) is 0.5 cm to 4 cm.

7. The gear surface burn detection device according to claim 1, characterized in that: The pressing portion comprises a pressing rod (21) and a pressing head (24); the pressing rod (21) is movably connected to the bracket so that the pressing rod (21) can move along a first direction; the pressing head (24) is arranged on the pressing rod (21), and the pressing head (24) has a pressing surface.

8. A gear surface burn detection device according to claim 7, characterized in that: The pressing head (24) is detachably connected to the pressing rod (21); and / or, the pressing surface has an outer shape that fits in with the cross section of the female mold (31); And / or, the pressing surface has the same shape as the gear (41) to be detected.

9. A gear surface burn detection device according to claim 8, characterized in that: The pressing head (24) is plugged into the pressing rod (21); Alternatively, the pressing head (24) is threadedly connected to the pressing rod (21).

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