Gear grinding device and grinding method

Abstract

The gear coping device is used for coping the tooth shape of a gear and comprises a positioning clamp, a movable platform, a coping tool clamping mechanism and a coping tool, the positioning clamp comprises a first clamp and a second clamp, the first clamp is arranged on the first end face of the gear, and the second clamp is arranged on the second end face of the gear. The first clamp and the second clamp are fastened through a fastener so as to lock the gear; the moving platform is arranged on the positioning clamp; the grinding tool clamping mechanism is arranged on the moving platform, and the grinding tool clamping mechanism can move on the moving platform; the grinding tool is arranged on the grinding tool clamping mechanism and can rotate. The gear grinding device disclosed by the embodiment of the invention is simple in structure, convenient to operate and capable of realizing on-site disassembly and assembly, improving the working efficiency and reducing the operation difficulty. The invention further discloses a gear grinding method.

Description

Technical Field

[0001] The present invention relates to the technical field of gear rings, and more specifically, to a gear grinding device and a gear grinding method. Background Art

[0002] The variable pitch system is an important system in the wind turbine generator system that participates in energy absorption, power control, and safety control. The blade is the final execution unit in the variable pitch system, and the variable pitch system requires high precision in the position and speed control of the blade. The variable pitch bearing is a component that connects the blade to the hub. The blade and the hub are connected by a variable pitch bearing. The outer ring of the variable pitch bearing is fixed to the hub, and the inner ring of the variable pitch bearing is fixed to the blade. The inner ring of the variable pitch bearing is integrated with the gear ring, and the blade is driven to rotate by driving the gear ring.

[0003] The blade drive methods generally include hydraulic cylinder drive, toothed belt drive, and gear drive. For the gear drive method, such as Figure 1 As shown, the drive gear 10 is meshed with the ring gear 21 of the pitch bearing 20. The drive gear 10 is used to keep the blades at the 0° position (the position where the blades are fully extended) most of the time, and is mostly used to maintain the static position (limiting) function. Unlike the gears in other gearboxes that are used for high-speed rotation to transmit speed and torque, the drive gear 10 and the ring gear 21 are at the 0° position for a long time and micro-motion wear occurs. Therefore, the ring gear 21 of the pitch bearing 20 and the 1-2 teeth of the drive gear 10 at the 0° position have serious wear problems.

[0004] When the gear ring 21 is worn, welding is often used to repair it. However, after welding, the tooth shape of the gear ring 21 is damaged. Figure 2 As shown in the figure, the tooth shape at position A is damaged, and the accuracy and surface finish of the gear ring 21 cannot meet the use requirements, and further repair is required. Usually, the gear ring 21 is repaired by hand-held grinding tools, which is difficult and has low work efficiency.

[0005] Therefore, how to improve the working efficiency of the gear ring grinding and reduce the operating difficulty to ensure the normal operation of the gear ring has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a gear grinding device to improve the working efficiency of the ring gear grinding, reduce the operating difficulty, and ensure the normal operation of the ring gear.

[0007] Another core of the present invention is to disclose a grinding method for grinding a gear ring using the above gear grinding device.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A gear grinding device for grinding the tooth profile of a gear, comprising:

[0010] A positioning fixture, the positioning fixture comprises a first fixture and a second fixture, the first fixture is arranged on the first end face of the gear, the first fixture comprises a first involute surface consistent with the side face of the gear teeth and a first arc surface consistent with the tooth top circle of the gear teeth; the second fixture is arranged on the second end face of the gear, the second fixture comprises a second involute surface consistent with the side face of the gear teeth and a second arc surface consistent with the tooth top circle of the gear teeth; the second fixture is arranged opposite to the first fixture, and the first involute surface and the second involute surface are coplanar with the side face of the gear teeth, the first arc surface and the second arc surface respectively coincide with the tooth top circle of the gear teeth, and the first fixture and the second fixture are fastened by fasteners to lock the gear;

[0011] A mobile platform, wherein the mobile platform is arranged on the positioning fixture;

[0012] A grinding tool clamping mechanism, which is disposed on a mobile platform and can move on the mobile platform;

[0013] The grinding tool is arranged on the grinding tool clamping mechanism, and the grinding tool can rotate.

[0014] Optionally, in the above-mentioned gear grinding device, the first clamp and the second clamp are positioned by a positioning piece, and positioning holes matching with the positioning piece are provided on the first clamp and the second clamp, and the positioning piece is tangent to the side surfaces of two adjacent gear teeth.

[0015] Optionally, in the above-mentioned gear grinding device, the positioning fixture includes a positioning plate, the positioning plate is arranged on the top of the first fixture and the second fixture and is located on the top of the gear, and the movable platform is arranged on the positioning plate.

[0016] Optionally, in the above-mentioned gear grinding device, the mobile platform comprises:

[0017] A first translation plate, the first translation plate is arranged on the positioning plate, and a first track extending along a first direction is arranged on the first translation plate;

[0018] A second translation plate, which is disposed on the first translation plate and slidably cooperates with the first track, and the second translation plate is provided with a second track extending along a second direction;

[0019] The third translation plate is arranged on the second translation plate and slidably cooperates with the second track. The third translation plate is provided with a third track extending along the third direction, and the grinding tool clamping mechanism slidably cooperates with the third track; the first direction, the second direction and the third direction are perpendicular to each other.

[0020] Optionally, in the above-mentioned gear grinding device, an operating mechanism is arranged on the mobile platform, and the operating mechanism includes a first operating part arranged on the first translation plate, a second operating part arranged on the second translation plate, and a third operating part arranged on the third translation plate, the first operating part drives the second translation plate to move, the second operating part drives the third translation plate to move, and the third operating part drives the grinding tool clamping mechanism to move.

[0021] Optionally, in the above-mentioned gear grinding device, scale lines are provided on the second translation plate and the third translation plate.

[0022] Optionally, in the above-mentioned gear grinding device, the first fixture further includes a first bottom surface consistent with the tooth root circle of the gear;

[0023] The second fixture includes a second bottom surface that is consistent with the root circle of the gear.

[0024] Optionally, in the above-mentioned gear grinding device, the grinding tool includes a rotating part and a cutter connected to the rotating part, and the cutter head of the cutter has the same shape as the tooth groove of the gear.

[0025] A gear grinding method, characterized in that the gear is ground using the gear grinding device according to any one of claims 1 to 8, comprising the following steps:

[0026] Install the positioning fixture and install the positioning fixture on the gear;

[0027] Install the mobile platform and install the mobile platform on the positioning fixture;

[0028] Install the grinding tool clamping mechanism and install the grinding tool positioning mechanism on the mobile platform;

[0029] Install the grinding tool and install the grinding tool on the grinding tool clamping mechanism;

[0030] Grind the gear, move the grinding tool clamping mechanism, and rotate the grinding tool to grind the gear.

[0031] Optionally, in the above gear grinding method, the step of installing the positioning fixture specifically includes:

[0032] Positioning the first fixture and the second fixture by means of a positioning member so that the first involute surface and the second involute surface are coplanar with the side surface of the gear tooth, and the first arc surface and the second arc surface coincide with the tooth top circle of the gear tooth;

[0033] The first clamp and the second clamp are fixed by fasteners.

[0034] It can be seen from the above scheme that the gear grinding device disclosed in the present invention has a simple structure, is easy to operate, and can be disassembled and assembled on site; the grinding tool can rotate, and after the positioning fixture is installed, the grinding tool clamping mechanism is moved along the mobile platform, and the welded gear can be ground, which can improve work efficiency and reduce operation difficulty. At the same time, it can reduce the error of manual grinding, improve the grinding accuracy, and ensure the normal operation of the gear. The gear grinding device disclosed in the embodiment of the present invention can disassemble multiple parts, reduce the size, and facilitate transportation.

[0035] The gear grinding method disclosed in the present invention has all the technical effects of the above-mentioned grinding device due to the use of the above-mentioned grinding device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention 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 of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic diagram of the structure of a variable pitch bearing in the prior art;

[0038] Figure 2 This is a schematic diagram of the structure of the gear ring after repair welding;

[0039] Figure 3 It is a structural schematic diagram of a positioning fixture disclosed in an embodiment of the present invention;

[0040] Figure 4 It is a front view of the grinding device disclosed in the embodiment of the present invention;

[0041] Figure 5 A front view of a first clamp disclosed in an embodiment of the present invention;

[0042] Figure 6 A front view of a second clamp disclosed in an embodiment of the present invention;

[0043] Figure 7 A top view of a second clamp disclosed in an embodiment of the present invention;

[0044] Figure 8 A schematic diagram of the structure of a tool disclosed in an embodiment of the present invention;

[0045] Fig. 9 It is a structural schematic diagram of a measuring rod disclosed in an embodiment of the present invention;

[0046] Fig.10 A schematic diagram of the structure of a bracket disclosed in an embodiment of the present invention;

[0047] Fig.11 It is a schematic diagram of the structure of the bracket connecting plate disclosed in an embodiment of the present invention.

[0048] Among them, 10 is a driving gear, 20 is a pitch bearing, and 21 is a gear ring;

[0049] 100 is a positioning fixture, 101 is a positioning hole, 110 is a first fixture, 111 is a first involute surface, 112 is a first arc surface, 113 is a first bottom surface, 120 is a second fixture, 121 is a second involute surface, 122 is a second arc surface, 123 is a second bottom surface, and 130 is a positioning plate;

[0050] 200 is a mobile platform;

[0051] 300 is a grinding tool clamping mechanism, 310 is a bracket, and 320 is a bracket connecting plate;

[0052] 400 is a grinding tool, 410 is a tool, 411 is a tool body, 412 is a tool head, 4121 is an involute segment, and 4122 is a straight line segment;

[0053] 500 is a positioning piece. DETAILED DESCRIPTION

[0054] The core of the present invention is to disclose a gear grinding device to improve the working efficiency of the gear ring grinding, reduce the operating difficulty, and ensure the normal operation of the gear ring.

[0055] Another core of the present invention is to disclose a grinding method for grinding a gear ring using the above gear grinding device.

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] like Figure 3 and Figure 4 As shown, an embodiment of the present invention discloses a gear grinding device, including a positioning fixture 100 , a moving platform 200 , a grinding tool clamping mechanism 300 and a grinding tool 400 .

[0058] For the convenience of explanation, the following description will be made by taking the gear ring 21 as an example. The positioning fixture 100 includes a first fixture 110 and a second fixture 120. The first fixture 110 is disposed on a first end surface of the gear ring 21. Figure 5 and Figure 6As shown, the first fixture 110 includes a first involute surface 111 consistent with the side of the gear teeth of the gear ring 21 and a first arc surface 112 consistent with the tooth top circle of the gear teeth. The consistency here means that the arc of the first arc surface 112 close to the tooth side coincides with the tooth top circle of the gear tooth.

[0059] The second fixture 120 is disposed on the second end face of the gear ring 21. The second fixture 120 includes a second involute surface 121 that is consistent with the side of the gear tooth and a second arc surface 122 that is consistent with the tooth top circle of the gear tooth. The consistency here means that the arc of the second arc surface 122 close to the gear tooth coincides with the tooth top circle of the gear tooth, that is, the first arc surface 112 and the second arc surface 122 coincide with the tooth top circle of the gear ring 21. The first fixture 110 and the second fixture 120 are disposed opposite to each other, and the first involute surface 111 and the second involute surface 121 are coplanar with the side of the same gear tooth, that is, the first involute surface 111, the second involute surface 121 and the side of the gear tooth coincide. When the gear ring 21 is ground, the gear tooth and the gear teeth adjacent to the gear tooth are ground. The first arc surface 112 and the second arc surface 122 are consistent with the tooth top circle of the gear teeth. The first clamp 110 and the second clamp 120 are fastened by fasteners to lock the gear ring 21, that is, the positioning clamp 100 is relatively fixed to the gear ring 21.

[0060] The mobile platform 200 is disposed on the positioning fixture 100, and the grinding tool clamping mechanism 300 is disposed on the mobile platform 200. The grinding tool clamping mechanism 300 can move on the mobile platform 200. Here, the movement means that the grinding tool clamping mechanism 300 can move in multiple directions. The grinding tool 400 is disposed on the grinding tool clamping mechanism 300, and the grinding tool 400 can rotate to grind the gear teeth of the gear ring 21.

[0061] It should be noted that the first end face and the second end face refer to the end faces at both ends of each gear tooth along the axial direction of the gear ring 21. There is no specific requirement for the specific length of the first clamp 110 and the second clamp 120, and the principle is to be able to lock the gear ring 21 and reduce the size. The extension length of the first arc surface 112 and the second arc surface 122 at least spans one gear tooth. The second clamp 120 shown in the figure includes an extension portion toward the tooth groove, and the extension portion is connected to the second involute surface 121.

[0062] When in use, first install the positioning fixture 100 on the ring gear 21 to lock the ring gear 21, then move the grinding tool 400 along the movable platform 200, move the grinding tool 400 to the position of the gear tooth that needs to be repaired, rotate the grinding tool 400, and grind the gear tooth that needs to be repaired by moving and rotating the grinding tool 400. The grinding tool 400 can be moved up and down along the movable platform 200 to adjust the grinding depth of the gear tooth that needs to be repaired.

[0063] The gear grinding device disclosed in the embodiment of the present invention, the arrangement of the first involute surface 111, the first arc surface 112, the second involute surface 121 and the second arc surface 122 can facilitate the positioning of the grinding tool 400, so that the center line of the grinding tool 400 coincides with the center line of the tooth groove of the gear tooth to be repaired, and the grinding tool 400 can be aligned. By moving and rotating the grinding tool 400, the gear ring 21 can be ground, and the tooth shape of the gear ring after grinding can be guaranteed.

[0064] Specifically, Figure 10-11 As shown, the grinding tool clamping mechanism 300 includes a bracket 310 and a bracket connecting plate 320 . The bracket 310 includes a socket capable of inserting the grinding tool 400 . The bracket 310 and the bracket connecting plate 320 are connected. The bracket connecting plate 320 is disposed on the mobile platform 200 .

[0065] The gear grinding device disclosed in the embodiment of the present invention has a simple structure, is easy to operate, and can be disassembled and assembled on site; the grinding tool 400 can rotate, and after the positioning fixture 100 is installed, the grinding tool clamping mechanism 300 is moved along the mobile platform 200, so that the gear ring 21 after welding can be ground, which can improve work efficiency and reduce operation difficulty. At the same time, it can reduce the error of manual grinding, improve the grinding accuracy, ensure the normal operation of the gear ring 21, and facilitate the grinding of the tooth shape of the large-sized gear ring 21. The gear grinding device disclosed in the embodiment of the present invention can disassemble multiple parts, can reduce the size, and is convenient for transportation. It should be noted that the gear grinding device disclosed in the embodiment of the present invention is not only suitable for variable pitch bearings, but also suitable for other scenarios where the gear ring 21 needs to be ground.

[0066] like Figure 3 and Fig. 9 As shown, in order to accurately position the first fixture 110 and the second fixture 120, so that when the positioning fixture 100 is installed on the gear ring 21, the first involute surface 111 and the second involute surface 121 are completely connected with the side surface of the gear tooth to form a surface, and the first arc surface 112 and the second arc surface 122 pass through the addendum circle of the gear tooth, or coincide with the addendum circle, in some specific embodiments, the first fixture 110 and the second fixture 120 are positioned by a positioning member 500. Specifically, the positioning member 500 can be a positioning measuring rod, such as Fig. 9As shown, or positioning blocks can be selected, the number of positioning members 500 is preferably multiple, and they are respectively arranged at the two ends of the first fixture 110 and the second fixture 120 to ensure the accuracy of positioning. The first fixture 110 and the second fixture 120 are both provided with positioning holes 101 that match the positioning members 500, and the positioning members 500 are tangent to the side surfaces of two adjacent gear teeth. When the positioning members 500 use positioning blocks, positioning blocks that are consistent with the shape of the tooth grooves can be selected. Preferably, the positioning holes 101 are arranged at the two ends of the first fixture 110 and the second fixture 120, and the two ends here refer to the two ends of the first fixture 110 extending along the arrangement direction of the gear teeth.

[0067] like Figure 3 and Figure 6-Figure 7 As shown, the positioning fixture 100 includes a positioning plate 130, which is disposed on the top of the first fixture 110 and the second fixture 120 and is located on the top of the gear ring 21, and the moving platform 200 is disposed on the positioning plate 130. The positioning plate 130 can be an integrated structure, which is disposed on either the first fixture 110 or the second fixture 120, or the positioning plate 130 can be a split structure, including two parts respectively disposed on the first fixture 110 and the second fixture 120, and the two parts of the coplanar moving platform 200 are respectively connected to the first fixture 110 and the second fixture 120, and the positioning plate 130 is preferably a split structure.

[0068] In some specific embodiments, the mobile platform 200 includes a first translation plate, a second translation plate and a third translation plate. Specifically, the first translation plate is disposed on the positioning plate 130, and can be fixed by bolts.

[0069] The first translation plate is provided with a first track extending in a first direction, the first direction being the arrangement direction of the gear teeth. The second translation plate is provided on the first translation plate and slides with the first track. The second translation plate is provided with a second track extending in a second direction, the second direction being the axial direction of the gear ring 21. The third translation plate is provided on the second translation plate and slides with the second track. The third translation plate is provided with a third track extending in a third direction, the grinding tool clamping mechanism 300 slides with the third track, the third direction being the vertical direction of the gear teeth, and the first direction, the second direction and the third direction are mutually perpendicular. By moving the second translation plate in the first direction, the grinding tool 400 can be adjusted to correspond to the tooth surface of the gear teeth to be ground, by moving the third translation plate in the second direction, the feeding of the grinding tool 400 along the extension direction of the tooth groove can be adjusted, and by moving the grinding tool clamping mechanism 300 in the third direction, the grinding depth of the grinding tool 400 can be adjusted.

[0070] In order to facilitate the translation adjustment of the grinding tool 400, an operating mechanism is provided on the mobile platform 200. Specifically, the operating mechanism includes a first operating part, a second operating part and a third operating part, wherein the first operating part includes a first screw and a first rotating handle provided at one end of the first screw, the first screw is rotationally matched with the first translation plate, the second translation plate is threadedly matched with the first screw, and the second translation plate can be moved along the first track by rotating the first handle. The second operating part includes a second screw and a second rotating handle provided at one end of the second screw, the second screw is rotationally matched with the second translation plate, the third translation plate is threadedly matched with the second screw through the connecting plate, and the third translation plate can be moved along the second track by rotating the second handle. The third operating part includes a third screw and a third handle provided at one end of the third screw, the third screw is rotationally matched with the third translation plate, the grinding tool 400 clamping mechanism is threadedly matched with the third screw, specifically, the bracket connecting plate 320 is threadedly matched with the third screw, and the grinding tool clamping mechanism 300 can be moved along the third track by rotating the third handle. Through the setting of the operating mechanism, the grinding tool 400 can be moved in the first direction, the second direction and the third direction respectively by rotating the corresponding rotating handle, thereby completing the grinding of the ring gear 21. The setting of the first handle, the second handle and the third handle facilitates the adjustment of the specific position of the grinding tool 400, and the operation is simple and convenient.

[0071] In order to accurately adjust the position of the grinding tool 400 to improve the grinding accuracy, on the basis of the above embodiment, scale lines are set on the second translation plate and the third translation plate to accurately adjust the movement of the grinding tool 400 along the tooth groove extension direction and the grinding depth. Of course, scale lines can also be set on the first translation plate to further improve the grinding accuracy.

[0072] In some specific embodiments, Figure 4-Figure 7 As shown, the first fixture 110 also includes a first bottom surface 113 that is consistent with the tooth root circle of the gear ring 21, and the second fixture 120 includes a second bottom surface 123 that is consistent with the tooth root circle of the gear ring 21. The consistency here means that the arcs of the first bottom surface 113 and the second bottom surface 123 close to the gear teeth coincide with the tooth root circle of the gear ring 21. This arrangement can improve the positioning accuracy of the first fixture 110 and the second fixture 120.

[0073] In some specific embodiments, the grinding tool 400 includes a rotating part and a tool 410 connected to the rotating part. The rotating part can be a driving motor, and the driving motor rotates to drive the tool 410. Further, the rotating part can also include a reducer and a housing, the driving motor is connected to the reducer, the reducer is connected to the tool 410, the driving motor and the reducer are arranged in the housing, and a switch is arranged on the housing to control the opening and closing of the grinding tool 400.

[0074] Furthermore, the rotating part can directly use the driving part of a handheld electric drill, that is, the drill bit is replaced with a tool 410, and the other parts directly use the existing driving part of the handheld electric drill. The handheld electric drill can also be replaced with a handheld grinder, angle grinder or other wired or wireless power tools. This method can directly use existing equipment, save costs, and is simple and convenient to operate. In order to ensure the tooth shape of the ring gear 21 after grinding, the cutter head 412 of the tool 410 has the same shape as the tooth groove. The specific structural diagram of the tool 410 is shown in FIG. Figure 8 The tool 410 shown includes a tool body 411 and a tool head 412, wherein the tool head 412 includes an involute segment 4121 and a straight segment 4122. Specifically, the tool 410 can be a milling cutter, a grinding head, a grinding wheel, a rotary file, a gear ring 21 processing tool, a planer, etc., preferably a milling cutter.

[0075] In addition, an embodiment of the present invention further discloses a gear grinding method, which uses the gear grinding device disclosed in the above embodiment to grind the gear, and specifically includes the following steps:

[0076] S1, installing the positioning fixture 100;

[0077] The positioning fixture 100 is installed on the gear ring 21 so that the positioning fixture 100 locks the gear ring 21. Specifically, the first fixture 110 and the second fixture 120 are positioned by the positioning member 500 so that the first involute surface 111 and the second involute surface 121 are coplanar with the side surface of the gear tooth, and the tooth top circle passes through the first arc surface 112 and the second arc surface 122, that is, the arc of the first arc surface 112 and the second arc surface 122 close to the inner side of the gear tooth coincides with the tooth top circle. Then, the first fixture 110 and the second fixture 120 are fixed by fasteners to lock the gear ring 21.

[0078] S2, installing the mobile platform 200;

[0079] The mobile platform 200 is mounted on the positioning fixture 100 in a detachable connection manner, which facilitates the assembly and disassembly of the mobile platform 200 and facilitates transportation.

[0080] S3, installing the grinding tool clamping mechanism 300;

[0081] The grinder positioning mechanism 300 is mounted on the mobile platform 200, specifically by bolt connection, which is convenient for assembly and disassembly, or by other connection methods.

[0082] S4, installing the grinding tool 400;

[0083] The grinding tool 400 is installed on the grinding tool clamping mechanism 300 so that the center line of the grinding tool 400 coincides with the center line of the tooth groove.

[0084] S5, grinding the gears;

[0085] The grinding tool 400 is started to rotate, and then the grinding tool clamping mechanism 300 is moved to drive the grinding tool 400 to move and grind the gear ring 21. The moving direction of the grinding tool clamping mechanism 300 is specifically adjusted according to the grinding requirements.

[0086] The gear grinding method disclosed in the present invention has all the technical effects of the above-mentioned grinding device due to the use of the above-mentioned grinding device, which will not be described in detail here.

[0087] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0088] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0089] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0090] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A gear grinding device for grinding the tooth shape of a gear, characterized in that: include: A positioning fixture (100), the positioning fixture (100) comprising a first fixture (110) and a second fixture (120), the first fixture (110) being arranged on a first end face of a gear, the first fixture (110) comprising a first involute surface (111) consistent with a side face of a gear tooth of the gear and a first arc surface (112) consistent with a tooth top circle of the gear tooth; the second fixture (120) being arranged on a second end face of the gear, the second fixture (120) comprising a second involute surface (111) consistent with a side face of the gear tooth An involute surface (121) and a second arc surface (122) consistent with the tooth top circle of the gear tooth; the second fixture (120) is arranged opposite to the first fixture (110), and the first involute surface (111) and the second involute surface (121) are coplanar with the side surface of the gear tooth, the first arc surface (112) and the second arc surface (122) respectively coincide with the tooth top circle of the gear tooth, and the first fixture (110) and the second fixture (120) are fastened by a fastener to lock the gear; A mobile platform (200), wherein the mobile platform (200) is arranged on the positioning fixture (100); a grinding tool clamping mechanism (300), wherein the grinding tool clamping mechanism (300) is arranged on the mobile platform (200), and the grinding tool clamping mechanism (300) is movable on the mobile platform (200); A grinding tool (400), wherein the grinding tool (400) is arranged on the grinding tool clamping mechanism (300), and the grinding tool (400) is rotatable.

2. The gear grinding device according to claim 1, characterized in that: The first clamp (110) and the second clamp (120) are positioned by means of a positioning piece (500); both the first clamp (110) and the second clamp (120) are provided with positioning holes (101) that match the positioning piece (500); and the positioning piece (500) is tangent to the side surfaces of two adjacent gear teeth.

3. The gear grinding device according to claim 2, characterized in that: The positioning fixture (100) comprises a positioning plate (130), the positioning plate (130) being arranged on the top of the first fixture (110) and the second fixture (120) and located on the top of the gear, and the moving platform (200) being arranged on the positioning plate (130).

4. The gear grinding device according to claim 3, characterized in that: The mobile platform (200) comprises: A first translation plate, the first translation plate being arranged on the positioning plate (130), the first translation plate being provided with a first track extending along a first direction; a second translation plate, the second translation plate being disposed on the first translation plate and slidably matched with the first track, the second translation plate being provided with a second track extending along a second direction; A third translation plate, the third translation plate is arranged on the second translation plate and is slidably matched with the second track, the third translation plate is provided with a third track extending along a third direction, the grinding tool clamping mechanism (300) is slidably matched with the third track; the first direction, the second direction and the third direction are perpendicular to each other.

5. The gear grinding device according to claim 4, characterized in that: An operating mechanism is arranged on the mobile platform (200), the operating mechanism comprising a first operating part arranged on the first translation plate, a second operating part arranged on the second translation plate, and a third operating part arranged on the third translation plate, the first operating part drives the second translation plate to move, the second operating part drives the third translation plate to move, and the third operating part drives the grinding tool clamping mechanism (300) to move.

6. The gear grinding device according to claim 5, characterized in that: The second translation plate and the third translation plate are provided with scale lines.

7. The gear grinding device according to claim 1, characterized in that: The first fixture (110) further comprises a first bottom surface (113) that is consistent with the tooth root circle of the gear; The second clamp (120) comprises a second bottom surface (123) that is consistent with the tooth root circle of the gear.

8. The gear grinding device according to any one of claims 1 to 7, characterized in that: The grinding tool (400) comprises a rotating part and a tool (410) connected to the rotating part, and a tool head (412) of the tool (410) has the same shape as a tooth groove of the gear.

9. A gear grinding method, characterized in that: Grinding the gear using the gear grinding device according to any one of claims 1 to 8 comprises the following steps: Installing the positioning fixture (100), and installing the positioning fixture (100) on the gear; Installing the mobile platform (200), and installing the mobile platform (200) on the positioning fixture (100); Installing the grinding tool clamping mechanism (300), and installing the grinding tool (400) positioning mechanism on the mobile platform (200); Installing the grinding tool (400), and installing the grinding tool (400) on the grinding tool clamping mechanism (300); The gear is ground, the grinding tool clamping mechanism (300) is moved, and the grinding tool (400) is rotated to grind the gear.

10. The gear grinding method according to claim 9, characterized in that: The steps of installing the positioning fixture (100) specifically include: The first clamp (110) and the second clamp (120) are positioned by means of a positioning member (500) so that the first involute surface (111) and the second involute surface (121) are coplanar with the side surface of the gear tooth, and the first arc surface (112) and the second arc surface (122) coincide with the tooth top circle of the gear tooth; The first clamp (110) and the second clamp (120) are fixed by fasteners.

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