Machining positioning device for gear without back cone structure

Abstract

A machining positioning device for a gear without a back cone structure comprises a body, a positioning mechanism and a tensioning mechanism, the positioning mechanism and the tensioning mechanism are arranged on the body, the positioning mechanism axially positions a workpiece, and the tensioning mechanism radially positions the workpiece; the positioning mechanism comprises a mounting base connected to the main body through a fixing assembly, a tooth mold part is arranged on the inner side of the mounting base, and a tooth mold groove and a first through hole are sequentially formed in the middle of the tooth mold part. A to-be-machined workpiece is positioned in a double-positioning mode by adopting the floating positioning tooth module and the tensioning mechanism, the floating positioning tooth module coordinates the accuracy of axial reference positioning, the tensioning mechanism coordinates the accuracy of radial reference positioning, the mounting seat is uniformly fixed on the main body by adopting three bolts, and the positioning precision is greatly improved. And the bolt is not completely locked, so that the tooth module positioned in a floating manner can slightly float in the radial direction, and the problem that the form and location tolerance of a product is out of tolerance after the product is processed due to over-constraint can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gear processing, in particular to a processing positioning device for a gear with a back cone structure. Background Art

[0002] A gear is a mechanical component with gears on the wheel rim that continuously mesh to transmit motion and power. The application of gears in transmission has appeared very early. At the end of the 19th century, the principle of gear cutting and special machine tools and tools that use this principle to cut gears appeared one after another. With the development of production, the smoothness of gear operation has received attention.

[0003] Gear machining is a process that uses mechanical methods to obtain a specific gear structure and precision. Gear machining has a dedicated and complex tool system, and different tools need to be selected and designed according to different gear products and machining methods. For example, hobs, shaving cutters, and gear shaping cutters are used for cylindrical gear machining, circular broaches are used for straight bevel gears, and various milling tools are used for spiral bevel gear machining.

[0004] In the prior art, when positioning the gear during machining, the back cone of the gear is usually clamped by a clamping plate, so as to achieve the effect of clamping and positioning the gear. However, there are some gears without a back cone structure, which makes it impossible to clamp and position the gears without a back cone structure using the existing clamping plate structure. Therefore, a machining positioning device for gears without a back cone structure is proposed, which can facilitate the positioning of gears without a back cone structure. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a machining positioning device for a gear with a back cone structure, which can facilitate the positioning of the gear with a back cone structure.

[0006] The utility model provides the following technical solutions: a machining positioning device for a back-bevel structure gear, comprising a main body and a positioning mechanism and a tensioning mechanism arranged on the main body, wherein the positioning mechanism positions the workpiece axially, and the tensioning mechanism positions the workpiece radially;

[0007] The positioning mechanism comprises a mounting seat connected to the main body through a fixing assembly, a tooth mold piece is arranged inside the mounting seat, a tooth mold groove and a first through hole are sequentially opened in the middle of the tooth mold piece, the tooth mold groove and the first through hole are located at the same axis, and the tooth mold groove fits with the workpiece;

[0008] The tensioning mechanism includes an extrusion piece fixedly connected to the main body, one end of the extrusion piece passes through the first through hole and the tooth die groove in sequence, a pull rod is provided on the main body, one end of the pull rod passes through the middle part of the extrusion piece and is connected to the main body, and a tensioning sleeve is provided on the pull rod.

[0009] Furthermore, the fixing assembly includes a plurality of first threaded holes arranged on the main body, and the mounting seat is provided with bolts of a number corresponding to the first threaded holes, and the bolts are threadedly connected to the first threaded holes.

[0010] Furthermore, there are three first threaded holes, which are evenly spaced and distributed on the main body.

[0011] Furthermore, the extrusion piece includes a connecting block fixedly connected to the main body and an extrusion block arranged on the connecting block, a second through hole is formed through the connecting block and the middle of the extrusion block, the extrusion block is integrally formed with the connecting block, and the extrusion block is conical.

[0012] Furthermore, the pull rod includes a connecting rod and a connecting head arranged on the connecting rod, a ring is fixedly connected to the outer wall of the connecting head, an external thread is arranged on the outer wall of the connecting rod, a second threaded hole is arranged on the main body, and the connecting rod is threadedly connected to the second threaded hole through the external thread.

[0013] Furthermore, the expansion sleeve includes a deformation portion, a conical inner hole is provided through the deformation portion, an annular groove is provided inside the deformation portion, and the circular ring is located in the annular groove.

[0014] Furthermore, the extrusion piece, the pull rod and the expansion sleeve are on the same axis.

[0015] The beneficial effects of the utility model are as follows: the workpiece to be processed is positioned by adopting a dual positioning method of a floatingly positioned tooth mold and a tensioning mechanism, the floatingly positioned tooth mold coordinates the accuracy of the axial reference positioning, the tensioning mechanism coordinates the accuracy of the radial reference positioning, the mounting seat is evenly fixed on the main body with three bolts, and the bolts are not completely tightened, so that the floatingly positioned tooth mold can achieve a slight float in the radial direction, which can effectively avoid the problem of over-constraint that leads to excessive shape and position tolerances after product processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the positioning mechanism of the utility model.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the first threaded hole and the second threaded hole of the utility model.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the tensioning mechanism of the utility model.

[0020] Figure 5It is a three-dimensional structural schematic diagram of the extrusion part of the utility model.

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the pull rod of the utility model.

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the expansion sleeve of the utility model.

[0023] Figure 8 It is a three-dimensional structural schematic diagram of the extrusion part, the pull rod and the expansion sleeve of the utility model.

[0024] The marks in the accompanying drawings are: 1-main body, 2-positioning mechanism, 21-mounting seat, 22-bolt, 23-tooth mold member, 24-tooth mold groove, 25-first through hole, 26-first threaded hole, 3-tensioning mechanism, 31-extrusion member, 311-connecting block, 312-extrusion block, 313-second through hole, 32-expansion sleeve, 321-deformation part, 322-inner hole, 323-annular groove, 33-pull rod, 331-connecting rod, 332-ring, 333-connecting head, 334-second threaded hole, 4-workpiece. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] A machining positioning device for a back-bevel gear, such as Figure 1-Figure 8 As shown, it includes a main body 1 and a positioning mechanism 2 and a tensioning mechanism 3 arranged on the main body 1.

[0029] Specifically, the main body 1 can be fixedly mounted on the processing equipment, the positioning mechanism 2 can axially position the workpiece 4, and the tensioning mechanism 3 can radially position the workpiece 4;

[0030] like Figure 2 and Figure 3 As shown, the positioning mechanism 2 includes a mounting seat 21 connected to the main body 1 through a fixing assembly, a tooth mold 23 is arranged inside the mounting seat 21, a tooth mold groove 24 and a first through hole 25 are sequentially opened in the middle of the tooth mold, the tooth mold groove 24 and the first through hole 25 are located at the same axis, and the tooth mold groove fits with the workpiece 4;

[0031] Specifically, the fixing assembly includes a plurality of first threaded holes 26 provided on the main body 1, and the mounting seat 21 is rotatably connected with a number of bolts 22 corresponding to the first threaded holes 26, and the bolts 22 are threadedly connected to the first threaded holes 26. There are three first threaded holes 26, which are evenly spaced on the main body 1, so that the mounting seat 21 is connected to the main body 1 through the fixing assembly, and a tooth mold part 23 is provided on the inner side of the middle part of the mounting seat 21, and the tooth mold part 23 is integrally formed with the mounting seat 21, and a tooth mold groove 24 and a first through hole 25 are sequentially opened in the middle part of the tooth mold part, and the tooth mold groove 24 and the first through hole 25 are on the same axis, and the tooth mold groove fits with the workpiece 4;

[0032] like Figure 3-Figure 8 As shown, the tensioning mechanism 3 includes an extrusion member 31 fixedly connected to the main body 1, one end of the extrusion member 31 passes through the first through hole 25 and the tooth mold groove 24 in sequence, a pull rod 33 is provided on the main body 1, one end of the pull rod 33 passes through the middle part of the extrusion member 31 and is connected to the main body 1, and a tensioning sleeve 32 is provided on the pull rod 33.

[0033] Specifically, the extrusion member 31 includes a connection block 311 fixedly connected to the main body 1 and an extrusion block 312 arranged on the connection block 311, a second through hole 313 formed in the middle of the connection block 311 and the extrusion block 312, the extrusion block 312 is integrally formed with the connection block 311, and the extrusion block 312 is tapered;

[0034] The pull rod 33 includes a connecting rod 331 and a connecting head 333 arranged on the connecting rod 331, a ring 332 is fixedly connected to the outer wall of the connecting head 333, an outer thread is arranged on the outer wall of the connecting rod 331, a second threaded hole 334 is arranged on the main body 1, and the connecting rod 331 passes through the second through hole 313 and is threadedly connected to the second threaded hole 334 through the outer thread;

[0035] The expansion sleeve 32 includes a deformation portion 321, a conical inner hole 322 is formed inside the deformation portion 321, an annular groove 323 is formed inside the deformation portion 321, and the ring 332 is located in the annular groove 323;

[0036] The extrusion member 31 , the pull rod 33 , and the expansion sleeve 32 are located at the same axis.

[0037] When the processing positioning device is needed, the operator can take out a workpiece 4 for processing, pass the inner hole 322 of the workpiece 4 through the tensioning mechanism 3, so that the tensioning mechanism 3 is located at the inner hole 322 of the workpiece 4, and at the same time place the workpiece 4 in the tooth mold groove 24, and fully fit the workpiece 4 with the tooth mold groove. Since the shape of the tooth mold groove is adapted to the shape of the workpiece 4, the axial movement of the workpiece 4 can be effectively limited by the effect of the tooth mold groove. Furthermore, since the mounting seat 21 is connected to the main body 1 through a fixing assembly, the operator should not completely lock the screw in the fixing assembly. The bolt 22 allows the tooth mold part 23 to achieve a slight float in the radial direction, avoiding the problem of over-constraint that causes the shape and position tolerance of the product after processing; after placing the workpiece 4 in the tooth mold groove, the operator can rotate the connecting head 333, and the connecting head 333 drives the connecting rod 331 to rotate. The connecting rod 331 cooperates with the second threaded hole 334 through the external thread thereon, so that the connecting rod 331 will move in the direction close to the extrusion part 31, and the connecting rod 331 will drive the connecting head 333 and the ring 332 to move together, and the ring 332 will drive the expansion sleeve 32 to the extrusion part 31. When the inner hole 322 of the expansion sleeve 32 moves to the extrusion block 312 of the extrusion piece 31, the extrusion block 312 will squeeze the deformation part 321 of the expansion sleeve 32, and the deformation part 321 will be deformed and expanded. The deformation expansion of the deformation part 321 will release the inner hole 322 of the workpiece 4, thereby realizing the radial position positioning of the workpiece 4. When the workpiece 4 needs to be removed, the operator only needs to rotate the connecting head 333 in the reverse direction, and the connecting head 333 drives the connecting rod 331 to rotate. The connecting rod 331 is connected to the second threaded hole 331 through the external thread thereon. 4, whereby the connecting rod 331 will move away from the extrusion member 31, the connecting rod 331 will drive the connecting head 333 and the ring 332 to move together, and the ring 332 will drive the expansion sleeve 32 to move away from the extrusion member 31. When the inner hole 322 of the expansion sleeve 32 is no longer in contact with the extrusion block 312 of the extrusion member 31, the extrusion block 312 will no longer squeeze the deformation portion 321 of the expansion sleeve 32, the deformation portion 321 will be reset, and the deformation portion 321 will no longer be released from the inner hole 322 of the workpiece 4, so that the operator can remove the workpiece 4.

[0038] In summary, the workpiece 4 to be processed is positioned by adopting a dual positioning method of a floatingly positioned tooth mold part 23 and a tensioning mechanism 3. The floatingly positioned tooth mold part 23 coordinates the accuracy of the axial reference positioning, and the tensioning mechanism 3 coordinates the accuracy of the radial reference positioning. The mounting seat 21 is evenly fixed on the main body 1 with three bolts 22, and the bolts 22 are not completely tightened, so that the floatingly positioned tooth mold part 23 can achieve a slight float in the radial direction, which can effectively avoid the problem of over-constraint that causes the shape and position tolerance of the product after processing.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A machining and positioning device for a back-bevel gear, characterized in that: It comprises a main body and a positioning mechanism and a tensioning mechanism arranged on the main body, wherein the positioning mechanism positions the workpiece axially, and the tensioning mechanism positions the workpiece radially; The positioning mechanism comprises a mounting seat connected to the main body through a fixing assembly, a tooth mold piece is arranged inside the mounting seat, a tooth mold groove and a first through hole are sequentially opened in the middle of the tooth mold piece, the tooth mold groove and the first through hole are located at the same axis, and the tooth mold groove fits with the workpiece; The tensioning mechanism includes an extrusion piece fixedly connected to the main body, one end of the extrusion piece passes through the first through hole and the tooth die groove in sequence, a pull rod is provided on the main body, one end of the pull rod passes through the middle part of the extrusion piece and is connected to the main body, and a tensioning sleeve is provided on the pull rod.

2. The processing positioning device according to claim 1, characterized in that: The fixing assembly includes a plurality of first threaded holes arranged on the main body, and the mounting seat is provided with bolts of a number corresponding to the first threaded holes, and the bolts are threadedly connected to the first threaded holes.

3. The positioning device according to claim 2, characterized in that: There are three first threaded holes, which are evenly spaced and distributed on the main body.

4. The processing positioning device according to claim 1, characterized in that: The extrusion piece includes a connection block fixedly connected to the main body and an extrusion block arranged on the connection block, a second through hole is formed through the connection block and the middle of the extrusion block, the extrusion block is integrally formed with the connection block, and the extrusion block is tapered.

5. The processing positioning device according to claim 4, characterized in that: The pull rod includes a connecting rod and a connecting head arranged on the connecting rod, a circular ring is fixedly connected to the outer wall of the connecting head, an external thread is arranged on the outer wall of the connecting rod, a second threaded hole is arranged on the main body, and the connecting rod is threadedly connected to the second threaded hole through the external thread.

6. The processing positioning device according to claim 5, characterized in that: The expansion sleeve comprises a deformation part, a conical inner hole is penetrated through the deformation part, an annular groove is formed inside the deformation part, and the circular ring is located in the annular groove.

7. The processing positioning device according to claim 1, characterized in that: The extrusion piece, the pull rod and the expansion sleeve are located at the same axis.

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