Clamping device for hollow bevel gear shaft

Abstract

The utility model discloses a clamping device for a hollow bevel gear shaft, which relates to the technical field of hollow bevel gear machining and is used for clamping the hollow bevel gear shaft, and the hollow bevel gear shaft comprises a rotating shaft part and a gear part which are integrally arranged; the clamping device comprises a positioning plate, one end face of the positioning plate is provided with a conical assembling groove, a positioning hole is formed in the axis position of the positioning plate, and the conical assembling groove is used for containing the gear part; the pressing plate is matched with the conical assembling groove, and the end face, facing the conical assembling groove, of the pressing plate tightly presses the hollow bevel gear shaft; and the fastener is used for connecting the positioning plate and the pressing plate. According to the clamping device of the hollow bevel gear shaft, the rotating shaft part is attached and positioned through the positioning hole, meanwhile, the pressing plate presses the rotating shaft part tightly by adjusting the fastening piece, linear contact between the gear part and the clamping device is changed into surface contact, and therefore the whole part is clamped more firmly. And an alignment part is converted into an alignment tool, so that clamping and alignment are facilitated when the inner hole of the part is turned, and the machining precision and the machining efficiency of the part are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow bevel gear processing, in particular to a clamping device for a hollow bevel gear shaft. Background Art

[0002] In the prior art, when the gear processing machine tool is working, the gear profile needs to be further refined after rough processing, such as gear grinding. It is necessary to adjust the angle of the gear in the circumferential direction to align the grinding wheel, and then fasten it to a special fixture on the workbench to ensure that both sides of the gear teeth can be refined through gear grinding.

[0003] At present, when a horizontal lathe is used to turn the inner hole of a part, the part needs to be clamped and aligned on the lathe. If the part is a hollow bevel gear shaft, there is line contact when the lathe clamps the tapered outer circle, that is, the clamping device and the part are in line contact. The part is not clamped securely, resulting in low alignment accuracy, and the accuracy of the processed gear is seriously affected. Utility Model Content

[0004] The utility model aims to provide a clamping device for a hollow bevel gear shaft, which solves the technical problem that the parts are not firmly clamped, resulting in low alignment accuracy.

[0005] To achieve the above-mentioned purpose, the utility model provides a clamping device for a hollow bevel gear shaft, which is used to clamp the hollow bevel gear shaft, wherein the hollow bevel gear shaft comprises a rotating shaft portion and a gear portion which are integrally arranged; the clamping device comprises:

[0006] The positioning plate is disc-shaped, and a conical assembly groove is provided on one end face of the positioning plate, and a positioning hole is provided at the axial position of the positioning plate. The positioning hole is connected to the conical assembly groove, the conical assembly groove is used to accommodate the gear part, and the positioning hole is used to fit and position with the rotating shaft part.

[0007] A pressure plate is matched with the conical assembly groove, and a through hole is arranged at the axial position of the pressure plate, the through hole is used for the shaft portion to pass through, and the pressure plate presses the hollow bevel gear shaft against the end surface of the conical assembly groove.

[0008] A fastener is used to connect the positioning plate and the pressing plate to complete the clamping of the hollow bevel gear shaft.

[0009] Preferably, a cylindrical groove is provided at an end surface of the conical assembly groove close to the positioning plate, the cylindrical groove is matched with the pressure plate, and the bottom surface of the cylindrical groove abuts against the side surface of the gear part.

[0010] Preferably, the overall diameter of the pressing plate is smaller than the inner diameter of the cylindrical groove.

[0011] Preferably, a plurality of through strip holes are arranged in an array on the outer side surface of the positioning plate, a plurality of through matching holes are arranged in an array on the outer side surface of the positioning plate, a plurality of strip grooves are arranged in an array on the inner side surface of the pressure plate, and the strip grooves are used to pass the fasteners.

[0012] Preferably, an annular groove is provided on one side of the pressure plate, a buffer gasket is provided in the annular groove, and a side surface of the buffer gasket is in contact with a side surface of the gear part.

[0013] Preferably, a set screw is provided on the outer peripheral side surface of the pressure plate, and one end of the set screw abuts against the circumferential side surface of the buffer gasket.

[0014] Preferably, a plurality of support springs are arranged in an array in the annular groove, and the plurality of support springs are all connected to the side surfaces of the buffer gasket.

[0015] Preferably, a plurality of adjusting screw rods are arranged in an array on the outer peripheral side surface of the positioning plate, an arc-shaped limiting plate is provided at one end of the adjusting screw rod, and the inner peripheral side surface of the arc-shaped limiting plate abuts against the outer side surface of the gear part.

[0016] Preferably, a gasket is provided at the connection between the fastener and the outer side surface of the positioning plate.

[0017] Compared with the above background technology, the utility model provides a clamping device for a hollow bevel gear shaft. After the shaft portion is placed into the conical assembly groove, the shaft portion is fitted and positioned through the positioning hole. At the same time, the fastener is adjusted to gradually enter the pressing plate into the conical assembly groove until the shaft portion is pressed. The line contact between the gear portion and the clamping device is changed to surface contact, so that the overall clamping of the part is more secure. Moreover, after the part is stably fixed, the alignment reference of the part can be accurately transferred, and the alignment part can be converted into an alignment tool, which is convenient for clamping and alignment when turning the inner hole of the part, and effectively improves the processing accuracy of the part. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model 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 in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 A cross-sectional schematic diagram provided for an embodiment of the utility model;

[0020] Figure 2 A cross-sectional schematic diagram of another embodiment provided by the utility model;

[0021] Figure 3 A schematic plan view of a pressing plate provided by an embodiment of the utility model;

[0022] Figure 4 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0023] Figure 5 for Figure 2 A magnified schematic diagram of point B in the middle.

[0024] Specifically, 1-hollow bevel gear shaft; 101-rotating shaft; 102-gear part; 2-positioning plate; 201-conical assembly groove; 202-cylindrical groove; 203-positioning hole; 3-adjusting screw; 4-arc-shaped limit plate; 5-pressure plate; 6-through hole; 7-fastener; 8-gasket; 9-strip hole; 10-strip slide groove; 11-matching hole; 12-buffer gasket; 13-fastening screw; 14-support spring; 15-lathe chuck. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1 and Figure 2 As shown, a clamping device for a hollow bevel gear shaft 1 is used to clamp the hollow bevel gear shaft 1, and the hollow bevel gear shaft 1 includes an integrally arranged shaft portion 101 and a gear portion 102; the clamping device includes: a positioning plate 2, a pressing plate 5, and a fastener 7 for connecting the positioning plate 2 and the pressing plate 5.

[0028] The positioning plate 2 is disc-shaped as a whole, and a conical assembly groove 201 is provided on the left end face of the positioning plate 2, and a positioning hole 203 is provided at the axial position of the positioning plate 2, and the positioning hole 203 is connected with the conical assembly groove 201, and the conical assembly groove 201 is used to accommodate the gear part 102, and the positioning hole 203 is used to fit and position the shaft part 101, and to assist in enhancing the fixing effect of the shaft part 101. After the shaft part 101 is placed into the conical assembly groove 201, the shaft part 101 is fit and positioned through the positioning hole 203, and at the same time, by screwing the fastener 7, the pressing plate 5 gradually enters the conical assembly groove 201 until the shaft part 101 is pressed, and the line contact between the gear part 102 and the clamping device is changed to surface contact, so that the overall clamping of the parts is more secure.

[0029] A cylindrical groove 202 is opened at the right end surface of the conical assembly groove 201 near the positioning plate 2, and the cylindrical groove 202 is matched with the pressure plate 5. When the pressure plate 5 gradually enters the conical assembly groove 201 until the shaft part 101 is pressed, the bottom surface of the cylindrical groove 202 can abut against the right side surface of the gear part 102, thereby increasing the contact area between the positioning plate 2 and the gear part 102, and further improving the stability of the positioning plate 2 clamping the gear part 102.

[0030] In one embodiment of the present invention, the overall diameter of the pressing plate 5 is smaller than the inner diameter of the cylindrical groove 202, ensuring that the pressing plate 5 can smoothly enter the cylindrical groove 202. Moreover, under the premise of meeting the clamping requirements, the thickness of the pressing plate 5 is as small as possible to reduce the weight of the pressing plate 5 and the overall weight of the clamping tooling, thereby facilitating operation.

[0031] It should be noted that the taper of the conical assembly groove 201 is designed according to the shape of the hollow bevel gear shaft 1 to ensure that the gear portion 102 of the hollow bevel gear shaft 1 can be matched with the conical assembly groove 201, thereby ensuring the stability of the hollow bevel gear shaft 1 after clamping.

[0032] In one embodiment of the utility model, the pressure plate 5 is adapted to the conical assembly groove 201, and a through hole 6 is provided at the axial position of the pressure plate 5, the through hole 6 is used for the shaft portion 101 to pass through, and the pressure plate 5 presses the hollow bevel gear shaft 1 against the end face facing the conical assembly groove 201, thereby further improving the stability of the fixation of the hollow bevel gear shaft 1.

[0033] like Figure 1 and Figure 3As shown, a plurality of through strip holes 9 are arranged in an array on the outer side surface of the positioning plate 2, and the strip holes 9 are located on the inner side of the conical assembly groove 201. A plurality of through matching holes 11 are arranged in an array on the outer side surface of the gear portion 102, and a plurality of strip slide grooves 10 are arranged in an array on the inner side surface of the pressure plate 5. The strip slide grooves 10 are used to pass the fasteners 7. When clamping parts of different specifications and sizes, that is, when the size of the gear portion 102 changes, the position of the fastener 7 in the slide groove is changed, and the position of the fastener 7 in the strip hole 9 is changed synchronously, so that the fastener 7 can pass through the matching hole 11 more accurately.

[0034] like Figure 4 As shown, an annular groove is provided on the right side of the pressure plate 5, and a buffer pad is provided in the annular groove. The material of the buffer pad 12 is preferably a copper pad, and it can also be other materials with better performance. The side of the buffer pad 12 fits with the side of the gear part 102, so that the side of the gear part 102 is evenly stressed, and the safety is better. Among them, a set screw 13 is provided on the outer peripheral side of the pressure plate 5, and one end of the set screw 13 abuts against the circumferential side of the buffer pad 12. If the subsequent tooling is worn, it is convenient to replace the copper pad.

[0035] In addition, if Figure 5 As shown, in another embodiment of the utility model, a plurality of support springs 14 can be selectively arranged in an array in the annular groove, and the buffer gasket 12 can be connected through the plurality of support springs 14. The arrangement of the support springs 14 can ensure that the pressure plate 5 is pressed against the parts while preventing the pressure plate 5 from damaging the contact surface of the parts due to a large force.

[0036] In one embodiment of the utility model, a plurality of adjusting screw rods 3 are arranged in an array on the outer peripheral side surface of the positioning plate 2, and an arc-shaped limit plate 4 is provided at one end of the adjusting screw rod 3. When clamping parts of different sizes, each adjusting screw rod 3 is rotated so that the inner peripheral side surface of the arc-shaped limit plate 4 abuts against the outer side surface of the gear part 102. It should be noted that the lengths of each adjusting screw rod 3 extending out of the assembly groove are the same to ensure that the rotating shaft part 101 and the positioning hole 203 are precisely matched.

[0037] Preferably, the inner diameter of the arc-shaped limit plate 4 can be designed according to the shape of the hollow bevel gear shaft 1 to be clamped, that is, the inner side surface of the arc-shaped limit plate 4 can be completely fitted with the outer side surface of the gear part 102, so that the circumferential side surface of the gear part 102 can be more fully abutted, thereby ensuring the stability of the clamping.

[0038] In one embodiment of the utility model, the fastener 7 is used to connect the positioning plate 2 and the pressure plate 5 to complete the clamping of the hollow bevel gear shaft 1. A gasket 8 is provided at the connection between the fastener 7 and the outer side of the positioning plate 2 to prevent the bolt from rigidly contacting the positioning plate 2 and increase the connection strength between the bolt and the positioning plate 2.

[0039] It should be noted that the diameter of the matching hole 11 is larger than the outer diameter of the fastener 7 to ensure that the fastener 7 can pass through the matching hole 11 smoothly and the fastener 7 avoids contact with the hollow bevel gear shaft 1 to ensure that the gear part 102 is accurately positioned during the clamping process.

[0040] In addition, in another embodiment of the utility model, a plurality of guide strips 16 are arranged in an array on the inner peripheral side surface of the through hole 6, and a plurality of key grooves are arranged in an array on the outer peripheral surface of the hollow bevel gear shaft 1. The guide strips 16 are slidably connected to the key grooves to assist the pressure plate 5 in stably pressing the hollow bevel gear shaft 1, ensuring that during the processing of the hollow bevel gear shaft 1, the pressure plate 5 will not shift or rotate relative to the hollow bevel gear shaft 1, thereby improving the processing accuracy of the hollow bevel gear shaft 1.

[0041] When the utility model is used, the shaft part 101 is first inserted into the positioning hole 203, the adjusting screw rod 3 is screwed, the arc-shaped limit plate 4 is used to assist in fixing the gear part 102, and the position of the fastener 7 is adjusted according to the size of the gear part 102 and the position of the matching hole 11. The fastener 7 passes through the strip hole 9, the matching hole 11 and the strip slide 10, and the other end of the fastener 7 is fixed by a nut. Each fastener 7 is screwed in turn, so that the pressing plate 5 gradually enters the tapered assembly groove 201 until the shaft part 101 is pressed, and the part is fixed. The positioning plate 2 is fixed by the lathe chuck 15, the part is processed, the left end face of the positioning plate 2 is aligned, and the left end inner hole is machined. The gear part 102 and the clamping device are changed from line contact to surface contact to obtain a more stable fixation of the part, and the alignment reference of the part can be transferred more accurately. The alignment part is converted into an alignment tool, which is convenient for clamping and alignment when turning the inner hole of the part, and effectively improves the processing accuracy and processing efficiency of the part.

[0042] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0043] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the utility model.

Claims

1. A clamping device for a hollow bevel gear shaft, characterized in that: Used to clamp a hollow bevel gear shaft, the hollow bevel gear shaft includes a rotating shaft portion and a gear portion that are integrally arranged; the clamping device includes: A positioning plate, in a disc shape, with a conical assembly groove provided on one end surface of the positioning plate, and a positioning hole provided at the axis position of the positioning plate, the positioning hole and the conical assembly groove being connected, the conical assembly groove being used to accommodate the gear part, and the positioning hole being used to fit and position with the rotating shaft part; A pressing plate is matched with the conical assembly groove, and a through hole is arranged at the axis position of the pressing plate, the through hole is used for the shaft portion to pass through, and the pressing plate presses the hollow bevel gear shaft against the end surface of the conical assembly groove; A fastener is used to connect the positioning plate and the pressing plate to complete the clamping of the hollow bevel gear shaft.

2. The clamping device for a hollow bevel gear shaft according to claim 1, characterized in that: The conical assembly groove is provided with a cylindrical groove at a position close to the end surface of the positioning plate, the cylindrical groove is matched with the pressing plate, and the bottom surface of the cylindrical groove is in contact with the side surface of the gear part.

3. The clamping device for a hollow bevel gear shaft according to claim 2, characterized in that: The overall diameter of the pressure plate is smaller than the inner diameter of the cylindrical groove.

4. The clamping device for a hollow bevel gear shaft according to claim 1, characterized in that: The outer side surface of the positioning plate is arrayed with a plurality of through strip holes, the outer side surface of the positioning plate is arrayed with a plurality of through matching holes, the inner side surface of the pressure plate is arrayed with a plurality of strip slide grooves, and the strip slide grooves are used to pass the fasteners.

5. The clamping device for a hollow bevel gear shaft according to claim 1, characterized in that: An annular groove is arranged on one side of the pressure plate, a buffer gasket is arranged in the annular groove, and a side surface of the buffer gasket is fitted with a side surface of the gear part.

6. The clamping device for a hollow bevel gear shaft according to claim 5, characterized in that: A set screw is arranged on the outer peripheral side surface of the pressure plate, and one end of the set screw abuts against the circumferential side surface of the buffer gasket.

7. The clamping device for a hollow bevel gear shaft according to claim 5, characterized in that: A plurality of support springs are arranged in an array in the annular groove, and the plurality of support springs are all connected to the side surfaces of the buffer gasket.

8. The clamping device for a hollow bevel gear shaft according to claim 1, characterized in that: A plurality of adjusting screw rods are arranged in an array on the outer peripheral side surface of the positioning plate, an arc-shaped limiting plate is arranged at one end of the adjusting screw rod, and the inner peripheral side surface of the arc-shaped limiting plate abuts against the outer side surface of the gear part.

9. The clamping device for a hollow bevel gear shaft according to claim 1, characterized in that: A gasket is arranged at the connection between the fastener and the outer side surface of the positioning plate.

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