Pull-down type expansion gear jig and gear machining equipment

Abstract

The utility model discloses a pull-down type expansion gear jig and gear machining equipment. The pull-down type expansion gear jig comprises a lower die, an expansion sleeve and a stretching module. The lower die comprises an operation part located at the upper end, an installation part located at the lower end and a first through hole penetrating through the whole lower die from top to bottom, the operation part is of a structure with the narrow upper portion and the wide lower portion, the expansion sleeve comprises a connecting part arranged at the upper end of the operation part and a plurality of expansion pieces arranged on the outer side face of the operation part, and the upper ends of the expansion pieces are connected with the installation part; the multiple expansion pieces are connected through connecting pieces, the inner side faces of the multiple expansion pieces are matched with the outer side face of the operation part, and the outer side faces of the multiple expansion pieces are matched with the inner side face of a gear to be machined. The stretching rod sequentially penetrates through the mounting part and the first through hole from top to bottom, when the stretching rod is pulled downwards, the pressing block can be driven to press the mounting part downwards, and then the mounting part drives the expansion pieces to expand downwards and outwards.

Description

TECHNICAL FIELD

[0001] The utility model relates to the manufacturing and its application technical field of function clamp, especially relates to a kind of down-draw type expansion gear jig and gear processing equipment. BACKGROUND

[0002] The cylindrical sheet gear in current market, simple appearance, is cylindrical through-hole structure, generally applicable gear processing equipment of upper die-core shaft-lower die structure.But with the increase of market demand, thin-walled cylindrical gear structure appears, existing gear processing equipment is not suitable for thin-walled structure, prone to extrusion warping of thin-walled cylindrical gear structure, unable to meet the processing demand. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this purpose, the utility model provides a kind of down-draw type expansion gear jig, can be evenly expanded when clamping to prop up inner hole, ensure that thin-walled cylindrical workpiece does not occur deformation, warping when clamping.

[0004] The utility model further provides a kind of gear processing equipment with the above-mentioned down-draw type expansion gear jig.

[0005] According to the down-draw type expansion gear jig of the first aspect embodiment of the utility model, including: lower die, the lower die includes the operating part at upper end, the mounting portion at lower end and the first through-hole that is penetrated through entire the lower die from top to bottom, the operating part is narrow in upper and wide in lower structure;

[0006] Expansion sleeve, the expansion sleeve includes the connecting portion being arranged at the upper end of the operating part and the plurality of expansion pieces being arranged at the outer side of the operating part, the upper end of the plurality of expansion pieces is connected with the connecting portion respectively, the plurality of expansion pieces are connected by connecting piece, the inner side of the plurality of expansion pieces is adapted with the outer side of the operating part, the outer side of the plurality of expansion pieces is adapted with the inner side of the gear to be processed;

[0007] Stretching module, the stretching module includes the pressing block and the stretching rod being connected with each other, the pressing block is pressed in the upper end surface of the connecting portion, the stretching rod is sequentially penetrated through the connecting portion and the first through-hole from top to bottom;

[0008] The stretching rod can drive the pressing block to press down the connecting portion when being pulled down, the connecting portion in turn drives the plurality of expansion pieces to expand downward and outward.

[0009] According to some embodiments of the utility model, still include base, first recess is provided with on the base upper end, second recess is provided with on the base lower extreme, the first recess with second recess between Setting has the through groove, the upper end of base with the installation part of lower mould is connected, the first recess with the bottom surface of installation part forms an activity cavity, the lower end of stretch rod is arranged in the first recess.

[0010] According to some embodiments of the utility model, the stretch module still includes limit piece and drive piece, the limit piece is arranged in the activity cavity, the limit piece is connected in the lower end of stretch rod, the drive piece is located in the second recess, the through groove is provided with guide sleeve, the guide sleeve is clamped between the drive piece and the limit piece, the limit piece, the guide sleeve and the drive piece are sequentially connected through a bolt.

[0011] According to some embodiments of the utility model, the guide sleeve includes at least two, the number of through groove and the number of guide sleeve are consistent.

[0012] According to some embodiments of the utility model, the limit piece is provided with threaded hole, the lower end of stretch rod is provided with thread, the lower end thread of stretch rod is connected and cooperates in the activity cavity and threaded hole.

[0013] According to some embodiments of the utility model, the inner side of the plurality of expansion pieces is connected through the connecting piece and is formed with tapered inner hole, the tapered inner hole is matched with the operating part of lower mould.

[0014] According to some embodiments of the utility model, the connecting piece is elastic glue, when the tapered inner hole moves downward, the tapered inner hole is extruded by the operating part of lower mould and uniformly expands and becomes larger.

[0015] According to some embodiments of the utility model, the operating part of lower mould is circular truncated cone structure.

[0016] According to some embodiments of the utility model, the upper end of installation part of lower mould is provided with gasket, the gasket is located between the operating part of lower mould and installation part of lower mould, the upper end surface of gasket is provided with product placement position.

[0017] The gear machining equipment according to the second aspect of the utility model embodiment comprises the device according to the first aspect of the utility model above.

[0018] The utility model embodiment has at least the following beneficial effects: can be uniformly expanded when clamping and props up product inner hole, ensures that thin-walled cylindrical workpiece does not deform when clamping, warping.

[0019] Additional aspects and advantages of the present application will be set forth in part in the following description, and in part will become apparent to those skilled in the art upon examination of the following description, or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1 is a cross-sectional view of an assembly structure of the downward-pulling expansion gear jig according to the embodiment of the present application;

[0022] Figure 2 is Figure 1 a lower die schematic view of the downward-pulling expansion gear jig shown in FIG.

[0023] Figure 3 is Figure 1 an expansion sleeve schematic view of the downward-pulling expansion gear jig shown in FIG.

[0024] Figure 4 is Figure 1 a base schematic view of the downward-pulling expansion gear jig shown in FIG.

[0025] Reference Signs:

[0026] lower die 100, first through hole 110,

[0027] expansion sleeve 200, connecting portion 210, expansion member 220, connecting member 230, conical inner hole 240,

[0028] stretching module 300, pressing block 310, stretching rod 320, limiting member 330, threaded through hole 331, driving member 340, bolt 350, guide sleeve 360,

[0029] base 400, first recess 410, movable cavity 411, second recess 420, through slot 430,

[0030] gasket 500. DETAILED DESCRIPTION

[0031] The embodiments of the present application will now be described in detail with reference to the accompanying drawings. In the following description, specific terminology and configuration are used for the purpose of providing one of ordinary skill in the art with a thorough understanding of the application. The embodiments described herein are examples and it is to be understood that the detailed description is not to be understood as limiting the application.

[0032] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the features limited by "first" and "second" can be explicitly or implicitly included one or more features. In the description of the utility model, unless otherwise specified, the meaning of "several" is three or more.

[0033] In the description of the utility model, unless otherwise explicitly limited, the words "set", "install", "connect", "connected" and the like should be broadly understood, and the skilled person in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0034] The following refers to Figures 1 to 4 A description of the down-draw expansion gear jig according to the utility model embodiment.

[0035] Referring to Figures 1 to 3 The down-draw expansion gear jig according to the utility model embodiment, as shown in the figure, comprises a lower die 100, an expansion sleeve 200 and a stretching module 300.

[0036] The lower die 100 comprises an operating part at the upper end, a mounting part at the lower end and a first through hole 110 penetrating through the entire lower die 100 from top to bottom, and the operating part has a structure of being narrow at the top and wide at the bottom;

[0037] The expansion sleeve 200 comprises a connecting part 210 arranged at the upper end of the operating part and a plurality of expansion pieces 220 arranged at the outer side of the operating part, the upper ends of the plurality of expansion pieces 220 are connected with the connecting part 210 respectively, the plurality of expansion pieces 220 are connected through a connecting piece 230, the inner side of the plurality of expansion pieces 220 is matched with the outer side of the operating part, and the outer side of the plurality of expansion pieces 220 is matched with the inner side of the gear to be machined;

[0038] The stretching module 300 comprises a pressing block 310 and a stretching rod 320 connected with each other, the pressing block 310 is arranged on the upper end surface of the connecting part 210, and the stretching rod 320 penetrates through the connecting part 210 and the first through hole 110 from top to bottom in sequence;

[0039] When the stretching rod 320 is pulled down, the pressing block 310 can drive the connecting part 210 to be pressed down, and the connecting part 210 in turn drives the plurality of expansion pieces 220 to expand downward and outward.

[0040] In use, the gear to be machined is placed on the expansion sleeve 200, at which time the gear to be machined is in clearance fit with the expansion sleeve 200, the stretching rod 320 is pulled down to drive the pressing block 310 to press down the connecting part 210, the connecting part 210 drives the plurality of expansion members 220 to displace downward, the plurality of expansion members 220 are expanded by the pressing of the operating part, the plurality of expansion members 220 are in fit with the inside of the gear to be machined, the gear to be machined is prevented from being deformed due to clamping during the machining process, and the positioning of the gear to be machined is stabilized, so that displacement does not occur during the machining process.

[0041] In some specific embodiments of the utility model, still include base 400, base 400 upper end is provided with first recess 410, base 400 lower end is provided with second recess 420, first recess 410 and second recess 420 between being provided with through slot 430, the upper end of base 400 is connected with the mounting portion of lower mould 100, first recess 410 and the bottom surface of mounting portion form an activity cavity 411, and the lower end of stretching rod 320 is arranged in first recess 410.

[0042] Referring to Figure 1 And Figure 4 In the embodiment, the base 400 is provided with two through slots 430 connecting the first recess 410 and the second recess 420, and the lower mould 100 is bolted to the base 400. The design of the base 400 bears the lower mould 100 and the stretching module 300, so that the downward-pulling expansion gear fixture can be installed and used on more equipment.

[0043] In some specific embodiments of the utility model, the stretching module 300 further includes a limiting piece 330 and a driving piece 340, the limiting piece 330 is arranged in the activity cavity 411, the limiting piece 330 is connected to the lower end of the stretching rod 320, the driving piece 340 is located in the second recess 420, a guide sleeve 360 is arranged in the through slot 430, the guide sleeve 360 is clamped between the driving piece 340 and the limiting piece 330, and the limiting piece 330, the guide sleeve 360 and the driving piece 340 are sequentially connected by a bolt 350. The guide sleeve 360 includes at least two, and the number of the through slots 430 is consistent with the number of the guide sleeves 360.

[0044] Reference Figure 1As shown, in the embodiment, the driving member 340 is arranged in the second groove 420 and can drive the limiting member 330 to displace along the up-down direction. The limiting member 330 is arranged in the movable cavity 411 and limits the up-down displacement distance of the stretching module 300. The limiting member 330 can drive the stretching rod 320 to displace up-down, so that the expansion sleeve 200 can expand. The number of the guide sleeves 360 is two, and the design of the guide sleeves makes the driving member 340 drive the limiting member 330 to move more smoothly in the base 400. The number of the through grooves 430 is consistent with the number of the guide sleeves 360. It can be understood that the number of the guide sleeves 360 can also be three, four or five.

[0045] In some specific embodiments of the utility model, the limiting member 330 is provided with a threaded hole 331, and the lower end of the stretching rod 320 is provided with a thread, and the thread of the lower end of the stretching rod 320 is connected and matched with the threaded hole 331 in the movable cavity 411.

[0046] Reference Figure 1 As shown, in the embodiment, the limiting member 330 is provided with a threaded hole and connected with the stretching rod 320, which is simple to install and can control the contact area between the expansion sleeve 200 and the lower mold 100 by controlling the length of the connection. When the connection length is shortened, the descending distance of the expansion sleeve 200 is reduced, and the contact between the expansion sleeve 200 and the lower mold 100 is reduced. When the connection length is lengthened, the descending distance of the expansion sleeve 200 is increased, and the contact between the expansion sleeve 200 and the lower mold 100 is increased.

[0047] In some specific embodiments of the utility model, the inner side surface of the plurality of expansion members 220 is connected by the connecting member 230 to form a tapered inner hole 240, and the tapered inner hole 240 is matched with the operating part of the lower mold 100. The connecting member 230 is elastic glue, and when the tapered inner hole 240 moves downward, the tapered inner hole 240 is uniformly expanded by the operating part of the lower mold 100.

[0048] Reference Figure 1 and Figure 3 As shown, in the embodiment, the expansion sleeve 200 is composed of six expansion members 220 to form a circular truncated cone structure, and the tapered inner hole 240 is formed in the inside. The design of the expansion member 220 ensures that the expansion sleeve 200 has a certain rigidity and does not deform when subjected to horizontal pressure. The connecting member 230 uses elastic glue and has a certain uniform deformation ability, so that when the tapered inner hole 240 moves downward, the tapered inner hole 240 is uniformly expanded when being pressed by the operating part of the lower mold 100. It can be understood that the number of expansion members 220 used is different according to the deformation ability of the connecting member 230. The smaller the deformation ability of the connecting member 230, the more expansion members 220 are needed. The material of the connecting member 230 can also be rubber, silicone or nylon.

[0049] In some embodiments of the utility model, the operation part of lower mould 100 is circular truncated cone structure.

[0050] Reference Figure 1 As shown in the figure, in the embodiment, when the operation part of lower mould 100 is inserted into expansion sleeve 200, it can extrude expansion sleeve 200 to make it expand uniformly, and the design of circular truncated cone structure can most uniformly support expansion sleeve 200 in the extrusion process, so that expansion sleeve 200 will not be damaged due to uneven stress. It can be understood that the operation part of lower mould 100 can also be a stepped structure, a wave structure or a trapezoidal structure.

[0051] In some embodiments of the utility model, the upper end of the mounting part of lower mould 100 is provided with gasket 500, gasket 500 is located between the operation part of lower mould 100 and the mounting part of lower mould 100, and the upper end face of gasket 500 is provided with product placing position.

[0052] Reference Figure 1 As shown in the figure, in the embodiment, gasket 500 is connected to lower mould 100, and the gear to be processed is placed on the upper end face of gasket 500. By using gasket 500 of different heights, the height of the gear to be processed in the vertical direction can be adjusted, on the one hand, the contact degree of the operation part of lower mould 100 and expansion sleeve 200 can be adjusted, and it is ensured that the contact between expansion sleeve 200 and the gear to be processed is not too tight or too loose, on the other hand, the change of height can make the processing surface change, realize the processing of more similar structure products 300, and the versatility of the device is enhanced.

[0053] In some embodiments of the utility model, in the embodiment, the threaded connection length of limiting piece 330 and stretching rod 320, the height of gasket 500 and the height of movable cavity 411 in the vertical direction can all affect the contact area between the inside of the gear to be processed and expansion sleeve 200. The height of gasket 500 can affect the mounting height of the gear to be processed, the connection length of limiting piece 330 and stretching rod 320 determines the initial position of expansion sleeve 200, and the height of movable cavity 411 in the vertical direction determines the distance that expansion sleeve 200 can displace. It can be understood that when adjusting the contact area between the inside of the gear to be processed and expansion sleeve 200, the change of the height of gasket 500 will also change the processing surface of the gear to be processed, and the height of movable cavity 411 in the vertical direction is difficult to adjust and change in real time, so in the use process, the expansion of expansion sleeve 200 is often controlled by changing the connection length of limiting piece 330 and stretching rod 320, so as to ensure the adjustment and normal use of the device.

[0054] The utility model embodiment further discloses a gear processing equipment, including above-mentioned lower expansion gear fixture.

[0055] When the device is used, the gear to be machined is placed on the expansion sleeve 200, at this time, the gear to be machined is in clearance fit with the expansion sleeve 200, the stretching rod 320 pulls down to drive the pressing block 310 to press down the connecting part 210, the connecting part 210 drives the expansion sleeve 200 to displace downward, the expansion sleeve 200 is extruded and expanded by the operating part, the expansion sleeve 200 cooperates with the inside of the gear to be machined, the gear to be machined is prevented from deforming due to clamping during the machining process, and the positioning of the gear to be machined is stabilized, so that displacement does not occur during the machining process.

[0056] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A drop-down expansion gear jig, characterized by, The utility model relates to a gear processing device, including: Lower mould (100), lower mould (100) including the operating part in the upper end, the mounting part in the lower end and the first through -hole (110) through whole lower mould (100) from top to bottom, the operating part is narrow in the upper and wide in the lower structure; Expansion sleeve (200), expansion sleeve (200) including the connecting part (210) set up in the operating part upper end and the several expansion pieces (220) set up in the operating part outside, the several expansion pieces (220) upper end links with connecting part (210) respectively, the several expansion pieces (220) between through connecting piece (230) link, the inner side of the several expansion pieces (220) with the outer side of operating part is adapted, the outer side of the several expansion pieces (220) with the inner side of the gear to be processed is adapted; Stretching module (300), stretching module (300) including the pressure block (310) and the stretching rod (320) that connect each other, the pressure block (310) pressure sets in the upper end surface of connecting part (210), the stretching rod (320) from top to bottom in turn penetrates connecting part (210) and first through -hole (110); The stretching rod (320) can drive the pressure block (310) to press down the connecting part (210) when pulling down, the connecting part (210) further drives the several expansion pieces (220) to expand downward and outward.

2. The drop-down expansion gear jig according to claim 1, wherein, It also includes a base (400), the first recess (410) is arranged on the upper end of the base (400), the second recess (420) is arranged on the lower end of the base (400), the through slot (430) is arranged between the first recess (410) and the second recess (420), the upper end of the base (400) is connected with the mounting part of the lower mould (100), the first recess (410) and the bottom surface of the mounting part form an active cavity (411), the lower end of the stretching rod (320) is arranged in the first recess (410).

3. The drop-down expansion gear jig of claim 2, wherein, The stretching module (300) further includes a limiting member (330) and a driving member (340), the limiting member (330) is arranged in the active cavity (411), the limiting member (330) is connected to the lower end of the stretching rod (320), the driving member (340) is located in the second recess (420), the guide sleeve (360) is arranged in the through slot (430), the guide sleeve (360) is clamped between the driving member (340) and the limiting member (330), the limiting member (330), the guide sleeve (360) and the driving member (340) are sequentially connected by a bolt (350).

4. The drop-down expansion gear jig of claim 3, wherein, The guide sleeve (360) includes at least two, the number of the through slot (430) is consistent with the number of the guide sleeve (360).

5. The drop-down expansion gear jig of claim 3, wherein, The limiting member (330) is provided with a threaded hole (331), the lower end of the stretching rod (320) is provided with a thread, the lower end of the stretching rod (320) is connected and matched with the threaded hole (331) in the active cavity (411).

6. The drop-down expansion gear jig of claim 1, wherein, The inner side of the several expansion pieces (220) is connected by the connecting piece (230) to form a tapered inner hole (240) which is matched with the operating part of the lower mold (100).

7. The drop-down expansion gear jig of claim 6, wherein, The connecting piece (230) is elastic glue, when the tapered inner hole (240) moves downward, the tapered inner hole (240) is uniformly expanded and enlarged by the operating part of the lower mold (100).

8. The drop-down expansion gear jig of claim 1, wherein, The operating part of the lower mold (100) is a circular truncated cone structure.

9. The drop-down expansion gear jig of claim 1, wherein, The upper end of the mounting part of the lower mold (100) is provided with a gasket (500), the gasket (500) is located between the operating part of the lower mold (100) and the mounting part of the lower mold (100), and the upper end surface of the gasket (500) is provided with a product placement position.

10. A gear machining apparatus characterized by comprising: The lower-pull expansion gear jig comprises the lower-pull expansion gear jig according to any one of claims 1 to 9.

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