Sun gear finish turning tool

Abstract

The utility model relates to the technical field of clamps, in particular to a sun gear finish turning tool which comprises a bottom plate, a first pressing device used for pressing the top face of a tooth end, a second pressing device used for pressing the top face of a spline end and a positioning shaft. The first pressing device comprises a first T-shaped rod, a pressing plate, a pressing rod and a first adjusting nut, wherein the first T-shaped rod and the pressing plate are detachably connected, the pressing rod is in sliding connection with the pressing plate and used for pressing the pressing plate, and the first adjusting nut is in threaded connection to the pressing rod and used for pressing the pressing plate. The positioning shaft is a stepped shaft and is detachably connected with the central position of the bottom plate; the positioning device is used for accurately positioning the sun gear and comprises an equal-height block which is detachably connected with the bottom plate; according to the scheme, the position for clamping the sun gear is changed from the lower edge of the tooth end to the top surface of the tooth end, and the second pressing device is additionally arranged to press the top surface of the spline end, so that the safety in the sun gear turning process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a sun gear finishing tool. Background Art

[0002] In a planetary gear system, the outer gear that serves as the central gear is called the sun gear. The sun gear is the basic component of a planetary gear system. Its function is to output power and drive the planetary gears meshing around it. Figure 1 As shown, it includes a tooth end 61 , a spline end 62 , and a center hole 63 .

[0003] When turning the sun gear, a vertical fixture is used to clamp the outer circle of the tooth end 61 of the sun gear 6. Figure 1 As shown, the commonly used vertical clamp is a four-jaw chuck clamp, including a base plate, four sets of positioning jaws slidably connected to the base plate, and a positioning shaft fixedly connected to the center of the base plate. The function of the positioning shaft is to pass through the center hole 63 of the sun gear 6 to preliminarily position the sun gear 6. The four sets of positioning jaws are symmetrically installed on the workbench at an angle of 90° and clamp the lower edge of the tooth end 61 of the sun gear 6 in the horizontal direction, so that the sun gear 6 remains upright. However, at this time, since the position that needs to be turned is usually concentrated on the spline end 62 of the sun gear 6, the tool feeds from the top, which will cause the turning position to be too far from the clamping position, which can easily lead to loosening during the turning process of the sun gear 6, and the safety of the turning process cannot be guaranteed. Utility Model Content

[0004] The utility model provides a sun gear finishing tool, which can solve the problem that the turning position is too far away from the position where the fixture clamps the sun gear when turning the sun gear, and improve the safety of the sun gear processing process.

[0005] This application provides the following technical solutions:

[0006] A sun gear finishing tooling comprises a base plate, a clamping device and a positioning shaft, wherein the clamping device comprises a first clamping device slidably connected to the base plate and detachably installed, and a second clamping device detachably connected to the top of the positioning shaft; the first clamping device is used to clamp the top surface of the tooth end, comprising a detachably connected first T-shaped rod and a pressure plate, a pressure rod slidably connected to the pressure plate for clamping the pressure plate, and a first adjusting nut threadedly connected to the pressure rod for clamping the pressure plate; the positioning shaft is a stepped shaft and is detachably connected to the central position of the base plate, comprising a cylindrical section and a light rod section with a diameter smaller than the cylindrical section; the second clamping device is used to clamp the top surface of the spline end, comprising an open washer, a second T-shaped rod detachably connected to the light rod section, and a second adjusting nut threadedly connected to the second T-shaped rod for clamping the open washer; a positioning device for accurately positioning the sun gear is also included, and the positioning device comprises an equal height block detachably connected to the base plate.

[0007] Beneficial effects:

[0008] 1. Reduce the distance between the turning position and the clamping position: when the turning position is at the spline end of the sun gear, the first clamping device is used to clamp the top surface of the tooth end. This is different from the prior art in which the clamping position of the vertical clamp is selected at the lower edge of the tooth end of the sun gear, which reduces the distance between the turning position and the clamping position, solves the problem of the sun gear loosening caused by the turning position being too far away from the clamping position, and is beneficial to ensure the safety of the turning process; the specific clamping process of the first clamping device is that the first clamping device is first slidably connected to the base plate and can be detachably installed. The height of the first T-bar selected in the first clamping device can be adjusted according to the specifications of the sun gear to be processed, and the position of the pressure plate can be changed by sliding the first clamping device so that the pressure plate contacts the top surface of the tooth end, and then the first adjusting nut is rotated so that the end of the pressure plate away from the first T-bar can be pressed down to clamp the top surface of the tooth end.

[0009] 2. The structural design of the positioning shaft can provide preliminary positioning for the installation of the sun gear, and can also reserve space for the installation of the second T-shaped rod in the second clamping device: the positioning shaft includes a cylindrical section and a light rod section with a diameter smaller than that of the cylindrical section, the cylindrical section is used to contact and limit the center hole of the sun gear, and the second T-shaped rod can be detachably connected to the light rod section through the gap formed by the diameter difference between the light rod section and the cylindrical section and the inner wall of the center hole of the sun gear to be processed.

[0010] 3. The second clamping device is used to clamp the top surface of the spline end: after using the first clamping device to clamp the top surface of the tooth end and turning the top surface of the spline end, use the second clamping device to clamp the top surface of the spline end to turn its outer circle; the specific clamping process is to first install the second T-rod on the bare rod section, and then install the open washer and the second adjusting nut on the second T-rod from bottom to top in sequence, and tighten the second adjusting nut to press down the open washer to clamp the top surface of the spline end.

[0011] 4. Use the positioning device to accurately position the sun gear: The height block is used as the support surface of the bottom of the sun gear, so the installation angle of the height block determines the accuracy of the sun gear positioning. Use auxiliary tools such as dial indicators to measure the runout tolerance between each height block to determine whether the positioning of the bottom of the sun gear is incorrect.

[0012] Further, as an improvement, a support rod is arranged between the first T-shaped rod and the pressing plate, and two ends of the support rod are detachably connected to the first T-shaped rod and the pressing plate respectively.

[0013] Beneficial effect: The function of the support rod is to cooperate with the first T-shaped rod to raise the height of the pressure plate to better adapt to sun gears of different specifications to be processed.

[0014] Further, as an improvement, the positioning device also includes a separately arranged leveling base and a leveling screw threadedly connected to the leveling base.

[0015] Beneficial effects: The threaded leveling screw and the leveling base can fine-tune the inclination angle of the bottom of the sun gear. The structure is simple, stable and reliable, which is beneficial to the accuracy of positioning the bottom of the sun gear.

[0016] Furthermore, as an improvement, a straight groove is set at the top of the light rod section, an inner hole rotatably matched with the second T-shaped rod is set in the middle position of the straight groove, and limiting grooves for limiting the second T-shaped rod from escaping from the straight groove are symmetrically set on both sides of the bottom of the straight groove.

[0017] Beneficial effect: The purpose of setting the straight groove at the top of the bare rod section is to provide a sliding channel for the second T-shaped rod to be detachably installed on the bare rod section. The purpose of setting the inner hole in the middle position of the straight groove and setting the limiting grooves symmetrically on both sides of the bottom of the straight groove is to achieve the limiting fixation of the second T-shaped rod by rotating the second T-shaped rod so that the bottom of the second T-shaped rod is embedded in the limiting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an axonometric view of a sun gear being clamped using a four-jaw chuck-type fixture in the prior art;

[0019] Figure 2 This is an axonometric view of a first embodiment of a sun gear finishing tooling of the utility model;

[0020] Figure 3 for Figure 1 Front view of the center positioning shaft;

[0021] Figure 4 For the corresponding Figure 1 Axonometric view of the sun gear when it is pressed;

[0022] Figure 5 This is an isometric view of the positioning shaft and the second T-shaped rod in the second embodiment of the present utility model. DETAILED DESCRIPTION

[0023] The following is further described in detail through specific implementation methods:

[0024] The marks in the drawings in the specification include: base plate 1, T-shaped straight groove 11, U-shaped open groove 12, positioning shaft 2, cylindrical section 21, light rod section 22, T-shaped through groove 221, straight groove 222, limit groove 223, positioning device 3, equal height block 31, leveling base 32, leveling screw 33, first clamping device 4, first T-shaped rod 41, support rod 42, pressure plate 43, pressure rod 44, first adjusting nut 45, second clamping device 5, open washer 51, second T-shaped rod 52, second adjusting nut 53, sun gear 6, tooth end 61, spline end 62, center hole 63.

[0025] Embodiment 1

[0026] Combination Figure 2-Figure 4 As shown, a sun gear finishing tooling includes a base plate 1, a clamping device, a positioning shaft 2, and a positioning device 3. The clamping device includes a first clamping device 4 which is slidably connected to the base plate 1 and can be detachably installed, and a second clamping device 5 which is detachably connected to the top of the positioning shaft 2.

[0027] The base plate 1 as a whole is a disc-shaped structure for supporting the entire tooling. Four T-shaped straight grooves 11 evenly distributed at an angle of 90° and four U-shaped open grooves 12 for fixing the base plate 1 are arranged on the base plate 1. The T-shaped straight grooves 11 and the U-shaped open grooves 12 are distributed at an angle of 45°. By installing screws in the U-shaped open grooves 12, it can be fixedly connected to the workbench of a lathe used for turning the sun gear 6.

[0028] The first clamping device 4 is used to clamp the top surface of the tooth end 61, and includes a first T-shaped rod 41, a support rod 42, a pressure plate 43, and a clamping assembly for clamping the pressure plate 43; the first T-shaped rod 41 is slidably connected to the T-shaped straight groove 11, the support rod 42 is located between the first T-shaped rod 41 and the pressure plate 43, and the two ends of the support rod 42 are respectively threadedly connected and fixed to the first T-shaped rod 41 and the pressure plate 43, and after removing the support rod 42, the first T-shaped rod 41 and the pressure plate 43 can also be threadedly connected. Fixation, specifically, a protruding external thread section is provided at the bottom of the pressure plate 43, and internal thread holes matching the external thread section are provided at the top of the support rod 42 and the top of the first T-shaped rod 41; a strip through hole is provided on the pressure plate 43, and the clamping assembly includes a pressure rod 44 slidingly connected to the pressure plate 43 in the strip through hole, and a first adjusting nut 45 threadedly connected to the top of the pressure rod 44 for clamping the pressure plate 43; by tightening the first adjusting nut 45, the pressure plate 43 can be pressed down to clamp the top surface of the tooth end 61.

[0029] The positioning shaft 2 is a stepped shaft used for roughly positioning the center hole 63 on the sun gear 6, including a cylindrical section 21 and a light rod section 22 whose diameter is smaller than that of the cylindrical section 21. Due to the diameter difference between the cylindrical section 21 and the light rod section 22, a step is formed on the positioning shaft 2; wherein the diameter of the cylindrical section 21 is 3 mm smaller than the diameter of the center hole 63 on the sun gear 6, and a T-shaped through groove 221 is provided at the top of the light rod section 22.

[0030] The second clamping device 5 is used to clamp the top surface of the spline end 62, and includes an open washer 51, a second T-shaped rod 52 slidably connected to the T-shaped through groove 221 on the light rod section 22, and a second adjusting nut 53 threadedly connected to the second T-shaped rod 52 for clamping the open washer 51; wherein the open washer 51 is generally in the shape of a disk with a notch, and the function of the notch is to slide with the second T-shaped rod 52 to facilitate installation. The diameter of the open washer 51 is larger than the diameter of the center hole 63 of the sun gear 6 to be processed. By tightening the second adjusting nut 53, the open washer 51 can be pressed down to clamp the top surface of the spline end 62.

[0031] It also includes a positioning device 3 for accurately positioning the sun gear 6; the positioning device 3 includes a T-shaped block that slides with the T-shaped straight groove 11 on the bottom plate 1, and a height-conforming block 31 that is threadedly connected to the top of the T-shaped block and is used to support the bottom of the sun gear 6. The height-conforming block 31 is cylindrical and 4 are evenly distributed at 90° on the bottom plate 1. When in use, the height-conforming block 31 with a height between the height of the bottom plate 1 and the cylindrical section 21 is installed on the bottom plate 1, and then a dial indicator is used to mark the end face of the height-conforming block 31 to confirm the horizontality of the upper end face of the height-conforming block 31. A transverse through hole is provided on the top, and a long rod of an auxiliary tool is inserted into the through hole to rotate the equal height block 31 so that the equal height block 31 is attached to and fixed to the top surface of the base plate 1; the positioning device 3 also includes four leveling bases 32 separately provided on the tooling, and a leveling screw 33 threadedly connected to the top of the leveling base 32. After the sun gear 6 is installed on the tooling, if the inclination angle of its bottom needs to be adjusted, the leveling base 32 with the pre-installed leveling screw 33 can be placed in the gap between the bottom of the sun gear 6 and the base plate 1, and then the leveling screw 33 can be turned to lift or drop it for adjustment.

[0032] The specific application process is as follows:

[0033] Taking the tooth end 61 facing downward and the spline end 62 being turned as an example, the following steps are included:

[0034] S1: Align the outer circle of the positioning shaft 2 and use the preset U-shaped opening groove 12 on the bottom plate 1 to fix the tooling on the workbench.

[0035] S2: By slidingly cooperating the T-shaped block under the contour block 31 with the T-shaped straight groove 11, the position of the contour block 31 on the T-shaped straight groove 11 is adjusted so that it covers the bottom surface of the tooth end 61 of the sun gear 6 to be processed, and then the contour block 31 is rotated to ensure that it fits with the top surface of the base plate 1, and then the top surfaces of the four contour blocks 31 are calibrated using a dial indicator to achieve the purpose of positioning the sun gear 6 in the next step.

[0036] S3: Use a crane or other lifting equipment to hang the sun gear 6 on the equal height block 31, so that the tooth end 61 is at the bottom and fits with the top surface of the equal height block 31. At the same time, the center hole 63 of the sun gear 6 passes through the light rod section 22 of the positioning shaft 2 and fits with the side wall of the cylindrical section 21 of the positioning shaft 2 to complete the positioning of the sun gear 6.

[0037] S4: Use a dial indicator to measure the outer circle runout of the spline end 62 and align the outer circle of the spline end 62.

[0038] S5: Put two symmetrical auxiliary tool magnetic bars in the four tooth grooves evenly distributed at an angle of 90° on the tooth end 61, and point the dial indicator on the outer circle of the magnetic bar. The rotating workbench records the dial indicator reading, and adjust the horizontal direction of the sun gear 6 according to the reading. Specifically, use the auxiliary tool copper rod to knock on its outer circle. When it is necessary to adjust it in the vertical direction, place the leveling base 32 pre-installed with the leveling screw 33 between the bottom of the sun gear 6 and the top of the base plate 1, and use the auxiliary tool wrench to turn the leveling screw 33 (the leveling screw 33 in this embodiment is an external hexagonal cylindrical head screw) to lift or drop it; the adjustment process needs to be repeated many times until the meter is qualified. At this time, check whether the equal height block 31 is in contact with the bottom of the tooth end 61. If there is a gap, insert an auxiliary tool iron sheet of appropriate thickness to fully support the bottom of the tooth end 61.

[0039] S6: Use the first clamping device 4 to clamp the tooth end 61; the specific operation process is to select the first T-shaped rod 41 and the support rod 42 that are consistent with the top surface height of the tooth end 61, and drive the pressure plate 43 to be placed on the top surface of the tooth end 61 and contact it under the sliding cooperation of the first T-shaped rod 41 and the T-shaped straight groove 11, and then rotate the first adjusting nut 45 to press down the side of the pressure plate 43 close to the tooth end 61 to achieve the purpose of clamping the pressure plate 43 on the tooth end 61, repeat the above steps, and the pressure plates on the four first clamping devices 4 evenly distributed at a 90° angle will all clamp the tooth end 61.

[0040] S7: Control the lathe to turn the spline end 62.

[0041] S8: Use the second clamping device 5 to clamp the spline end 62; the specific operation process is to first slide and install the second T-shaped rod 52 on the T-shaped through groove 221 of the light rod section 22, and then install the open washer 51 and the second adjusting nut 53 on the second T-shaped rod 52 from bottom to top.

[0042] S9: Control the lathe to turn each outer circle between the tooth end 61 and the spline end 62 of the sun gear 6 .

[0043] S10: Remove the first clamping device 4 and the second clamping device 5, replace the sun gear 6 and repeat the steps after S3.

[0044] The lathe including the workbench and the auxiliary tools, long rod, magnetic rod, copper rod, wrench and iron sheet used above are all commonly used tools in the prior art and will not be discussed separately here.

[0045] Embodiment 2

[0046] The difference between this embodiment and the first embodiment is that Figure 5 As shown, a straight groove 222 is longitudinally arranged at the top of the polished rod segment 22, an inner hole rotatably matched with the second T-shaped rod 52 is arranged in the middle position of the straight groove 222, and transverse limiting grooves 223 for limiting the second T-shaped rod 52 from detaching from the polished rod segment 22 are symmetrically arranged on both sides of the bottom of the straight groove 222.

[0047] When in use, the second T-shaped rod 52 is first slidably installed in the straight groove 222, and then the second T-shaped rod 52 is rotated so that the bottom of the second T-shaped rod 52 can be embedded in the limiting groove 223, thereby achieving the purpose of limiting the second T-shaped rod 52 from separating from the straight groove 222 and then leaving the polished rod segment 22.

[0048] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A sun gear finishing tool, comprising a base plate, a clamping device, and a positioning shaft, characterized in that: The clamping device comprises a first clamping device which is slidably connected to the bottom plate and can be detachably installed, and a second clamping device which is detachably connected to the top of the positioning shaft; The first pressing device is used to press the top surface of the tooth end, including a first T-shaped rod and a pressing plate that are detachably connected, a pressing rod that is slidably connected to the pressing plate and is used to press the pressing plate, and a first adjusting nut that is threadedly connected to the pressing rod and is used to press the pressing plate; The positioning shaft is a stepped shaft and is detachably connected to the center of the base plate, and comprises a cylindrical section and a polished rod section with a diameter smaller than that of the cylindrical section; The second pressing device is used to press the top surface of the spline end, and includes an open washer, a second T-shaped rod detachably connected to the polished rod section, and a second adjusting nut threadedly connected to the second T-shaped rod for pressing the open washer; A positioning device for accurately positioning the sun gear is also included, and the positioning device includes a height-equalizing block detachably connected to the base plate.

2. A sun gear finishing tool according to claim 1, characterized in that: A support rod is arranged between the first T-shaped rod and the pressing plate, and two ends of the support rod are detachably connected to the first T-shaped rod and the pressing plate respectively.

3. A sun gear finishing tool according to claim 2, characterized in that: The positioning device also includes a separately arranged leveling base and a leveling screw threadedly connected to the leveling base.

4. A sun gear finishing tool according to any one of claims 1 to 3, characterized in that: A straight groove is arranged on the top of the polished rod section, an inner hole rotatably matched with the second T-shaped rod is arranged in the middle of the straight groove, and limiting grooves for limiting the second T-shaped rod from leaving the straight groove are symmetrically arranged on both sides of the bottom of the straight groove.

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