Tool for gear machining

Abstract

The utility model provides a gear machining tool which comprises a base, a taper sleeve, an expansion sleeve and a gland which are coaxially matched and sequentially arranged, the base, the taper sleeve, the expansion sleeve and the gland are all of a hollow structure so as to form a mandrel mounting hole coaxial with the axis, and the base is fixedly connected with the taper sleeve; the gland further extends to the base along the inner wall of the mandrel mounting hole and is elastically connected with the base through a first axial spring, during use, the expansion sleeve is sleeved with a gear blank in advance, then the mandrel is clamped, the gland is extruded through the mandrel, then the expansion sleeve is driven to be pushed towards the taper sleeve, and under the action of the taper sleeve, the expansion sleeve expands outwards, and the gear blank is fixed. According to the tool for gear machining, the expansion sleeve and the taper sleeve are in contact through the smooth face, the requirement for coaxiality can be effectively met, machining is convenient, the machining cost of the tool can be effectively reduced, and then the production cost of gear machining such as gear hobbing is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, and particularly relates to a tooling for gear processing. Background Art

[0002] Hobbing has the characteristics of high precision, high efficiency, wide application range and suitability for various production scales, and occupies an important position in gear processing.

[0003] When a gear blank is processed by hobbing, it needs to be fixed by a matching tooling to ensure the quality of hobbing. Generally, an expansion sleeve is used to fix the gear blank from the inner ring of the gear blank. The expansion sleeve is assembled onto the mandrel, and the mandrel and the base are inserted and clamped to clamp and fix the gear blank. In the prior art, the expansion sleeve is screwed and positioned with the mandrel. To ensure the shaft accuracy, the processing accuracy requirements for the threads on the expansion sleeve and the mandrel are high, and the manufacturing difficulty and cost are high, thus increasing the production cost of gear hobbing. Summary of the Utility Model

[0004] Based on this, the purpose of the utility model is to provide a tooling for gear processing to solve the problem that the screwed connection between the expansion sleeve and the mandrel in the prior art has high requirements for thread processing accuracy, resulting in relatively high production costs for gear hobbing.

[0005] The utility model provides a tooling for gear processing, which is characterized in that it includes: a base, a tapered sleeve, an expansion sleeve and a gland that are coaxially matched and arranged in sequence, wherein,

[0006] The base, the tapered sleeve, the expansion sleeve and the gland are all of hollow structures to form a mandrel mounting hole coaxial with the axis, and the base is fixedly connected with the tapered sleeve;

[0007] The gland also extends along the inner wall of the mandrel mounting hole to the base and is elastically connected with the base through a first axial spring.

[0008] Optionally, the gland includes a first gland and a second gland in a T shape. The cap end of the first gland is elastically connected with the base through the first axial spring. The bottom end of the first gland is butt-jointed with the bottom end of the second gland, and the cap end of the second gland covers the top end of the expansion sleeve.

[0009] Optionally, an installation groove is further arranged at the top end of the base. The first gland is arranged in the installation groove, and the size of the installation groove is larger than the size of the cap end of the first gland to form a gap between the installation groove and the first gland. The tapered sleeve also extends into the gap for setting.

[0010] Optionally, the second gland is also fixedly connected with the expansion sleeve through bolts.

[0011] Optionally, a limiting groove is further provided on the outer side wall of the second gland, and a limiting rod is further provided on the tapered sleeve, and the limiting rod extends into the limiting groove.

[0012] Optionally, a spacer ring is further included, and the spacer ring is arranged at the top end of the tapered sleeve and is located between the tapered sleeve and the gland.

[0013] Optionally, a mandrel is further included, the mandrel can be installed in the mandrel mounting hole and is fixedly connected with the base by clamping, and a gland base is fixedly arranged on the mandrel, so that when the mandrel and the base are clamped and fixed, the gland is pressed by the gland base.

[0014] Optionally, a first gear positioning member is sleeved outside the tapered sleeve, and a second gear positioning member is further provided on the gland base. Both the first gear positioning member and the second gear positioning member are of concave structures, and the limiting edges of the concave structures are in alignment and matching with the tooth root positions of the gear blank.

[0015] Optionally, the gland base includes a fixed seat and a movable seat. The movable seat is arranged inside the fixed seat and is interlocked and matched. The fixed seat is fixedly connected with the mandrel base of the mandrel by bolts. The movable seat is elastically connected with the mandrel base by a second axial spring, and the elastic coefficient of the second axial spring is greater than the elastic coefficient of the first axial spring.

[0016] The tooling for gear processing provided by the present utility model includes a base, a tapered sleeve, an expansion sleeve and a gland which are coaxially matched and arranged in sequence. Among them, the base, the tapered sleeve, the expansion sleeve and the gland are all of hollow structures to form a mandrel mounting hole coaxial with the axis. The base is fixedly connected with the tapered sleeve; the gland also extends along the inner wall of the mandrel mounting hole to the base and is elastically connected with the base by a first axial spring. During use, the gear blank is pre-sleeved outside the expansion sleeve, then the mandrel is clamped, the gland is extruded by the mandrel, and then the expansion sleeve is driven to advance towards the tapered sleeve. Under the action of the tapered sleeve, the expansion sleeve expands and tightens outwards to fix the gear blank. The expansion sleeve and the tapered sleeve are in contact through a smooth surface, which can effectively ensure the coaxiality requirement, and the processing is convenient, which can effectively reduce the processing cost of the tooling, and further reduce the production cost of gear processing such as hobbing. Brief Description of the Drawings

[0017] Figure 1 is a schematic diagram of the main structure of the tooling for gear processing in the present utility model;

[0018] Figure 2 is a schematic diagram of the structure of the tooling for gear processing in the present utility model in the use state.

[0019] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific Embodiments

[0020] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] To solve the problem in the prior art that the expansion sleeve and the mandrel are screwed together, which requires high precision in thread processing and results in a relatively high production cost for gear hobbing, the present utility model provides a tooling for gear processing, which includes a base, a tapered sleeve, an expansion sleeve and a gland that are coaxially matched and arranged in sequence. Among them, the base, the tapered sleeve, the expansion sleeve and the gland are all hollow structures to form a mandrel mounting hole coaxial with the axis. The base is fixedly connected to the tapered sleeve; the gland also extends along the inner wall of the mandrel mounting hole to the base and is elastically connected to the base through a first axial spring. During use, the gear blank is pre-sleeved outside the expansion sleeve, and then the mandrel is clamped. The mandrel squeezes the gland, and then drives the expansion sleeve to advance towards the tapered sleeve. Under the action of the tapered sleeve, the expansion sleeve expands outwards to tighten the gear blank. During unloading, the first axial spring can push open the gland, and the pre-tightening force of the expansion sleeve is released, so that the unloading of the gear blank can be realized, which is convenient and effective. Among them, the expansion sleeve and the tapered sleeve are in contact through a smooth surface, which can effectively ensure the coaxiality requirement and is convenient for processing, and can effectively reduce the processing cost of the tooling, and further reduce the production cost of gear processing such as hobbing.

[0024] Specifically, as Figure 1 and Figure 2As shown in the figure, a tooling for gear machining in this embodiment and a structural schematic diagram in its working state are shown. The tooling for gear machining mainly includes: a base 110, a tapered sleeve 120, a expanding sleeve 130, and a gland that are coaxially matched and arranged in sequence. Among them, the base 110, the tapered sleeve 120, the expanding sleeve 130, and the gland are all hollow structures to form a mandrel mounting hole coaxial with the axis. So that after the mandrel 210 is clamped and the mandrel 210 is tightened by the pull rod 301, the gland can be pressed, and the gland then pushes the expanding sleeve 130 to axially shift towards the tapered sleeve 120. The tapered sleeve 120 can be stabilized by itself and the mandrel support. Under the action of the wedge-shaped surface where the tapered sleeve 120 and the expanding sleeve 130 contact, the expanding sleeve 130 expands outwards to realize the tensioning and fixing of the external gear blank 01. The base 110 and the tapered sleeve 120 are fixedly connected by an axial screw.

[0025] The gland also extends along the inner wall of the mandrel mounting hole to the base 110 and is elastically connected to the base 110 through a first axial spring 143. So that after the mandrel 210 is taken out, the gland can be pushed open to release the limit on the expanding sleeve 130 and release the fixation, so that the gear blank 01 can be conveniently taken out.

[0026] For the convenience of product assembly, in this embodiment, the gland includes a first gland 141 and a second gland 142 in a T shape. The cap end of the first gland 141 is elastically connected to the base 110 through a first axial spring 143. The bottom end of the first gland 141 is butt-jointed with the bottom end of the second gland 142. The cap end of the second gland 142 covers the top end of the expanding sleeve 130. The cap end of the first gland 141 can be limited and positioned by the tapered sleeve 120. After the tapered sleeve 120 is fixedly connected to the base 110, the first gland 141 can be synchronously limited and positioned to maintain the elastic connection, so that the second gland 142 does not need to consider the assembly of the spring during assembly, which can reduce the amount of assembly operation.

[0027] To ensure the coaxiality requirement, in this embodiment, an installation groove is further provided at the top end of the base 110. The first gland 141 is arranged in the installation groove, and the size of the installation groove is larger than the size of the cap end of the first gland 141 to form a gap between the installation groove and the first gland 141. The tapered sleeve 120 also extends into the gap for nested assembly. By ensuring the machining accuracy of the tapered sleeve 120 and the base 110, the coaxial assembly accuracy between the tapered sleeve 120 and the base 110 can be ensured.

[0028] The contact surface between the second gland 142 and the expanding sleeve 130 is small. To improve the circumferential stability of the expanding sleeve 120, in this embodiment, the second gland 142 is also fixedly connected to the expanding sleeve 130 by bolts.

[0029] Taking into account that the first pressure cover 141 and the second pressure cover 142 are separately arranged, the first pressure cover 141 can be limited and positioned by the cone sleeve 120. In the present embodiment, a limiting groove 1421 is further provided on the outer wall of the second pressure cover 142, and a limiting rod 1211 is further provided on the cone sleeve 120. The limiting rod 1211 extends into the limiting groove 1421. The limiting groove 1421 and the limiting rod 1211 can limit the axial displacement of the second pressure cover 142 to prevent the second pressure cover 142 from falling off.

[0030] In order to reduce the possibility of mechanical wear between the pressure cover 142 and the tapered sleeve in the circumferential direction, in the present embodiment, a spacer 150 is further provided. The spacer 150 is arranged at the top of the tapered sleeve 120 and is located between the tapered sleeve 120 and the pressure cover. Specifically, it is located between the second pressure cover 142 and the tapered sleeve 120. A groove is also arranged on the top of the tapered sleeve 120 to facilitate the installation of the spacer 150. Different sizes of gears can be achieved by selecting spacers of different heights to match different expansion sleeves.

[0031] The core shaft 210 can be installed in the core shaft 210 installation hole and is clamped and fixedly connected to the base 110 through the pull rod 301. When the pull rod 301 moves, it can drive the core shaft 210 to move downward. A pressure cover base is also fixedly provided on the core shaft 210, so that when the core shaft 210 and the base 110 are clamped and fixed, the pressure cover can be pressed by the pressure cover base, thereby realizing the expansion sleeve tensioning and fixing.

[0032] The fixing effect of the gear blank 01 is generally better from the periphery. Correspondingly, a first gear positioning member 101 is also sleeved on the outside of the cone sleeve 120, and a second gear positioning member 201 is also provided on the pressure cover base 110. The first gear positioning member 101 and the second gear positioning member 201 are both concave structures, and the limiting edges of the concave structures are aligned with the root positions of the gear blank 01. For different sizes, the positioning requirements can be guaranteed by selecting first gear positioning members and second gear positioning members of corresponding sizes.

[0033] In order to reduce the dimensional accuracy requirements of the rigid docking of the expansion sleeve and the pressure cover, in the present embodiment, the pressure cover base includes a fixed seat 221 and a movable seat 222. The movable seat 222 is arranged in the fixed seat 221 and interlocked. The fixed seat 221 and the core shaft 210 base 110 of the core shaft 210 are fixedly connected by bolts. The movable seat 222 and the core shaft base are elastically connected by a second axial spring 223, and the elastic coefficient of the second axial spring 223 is greater than the elastic coefficient of the first axial spring 143, so that the movable seat 222 and the pressure cover are elastically docked, which can reduce the dimensional design accuracy requirements, and can flexibly adapt to the clamping requirements of gears of various sizes, thereby improving the scope of application.

[0034] The tooling for gear processing provided by the present utility model includes a base, a taper sleeve, an expansion sleeve and a gland which are coaxially matched and arranged in sequence. Among them, the base, the taper sleeve, the expansion sleeve and the gland are all of hollow structures to form a mandrel mounting hole coaxial with the axis. The base is fixedly connected with the taper sleeve; the gland also extends along the inner wall of the mandrel mounting hole to the base and is elastically connected with the base through a first axial spring. During use, the gear blank is pre-sleeved outside the expansion sleeve, then the mandrel is clamped. The gland is extruded by the mandrel, and then the expansion sleeve is driven to advance towards the taper sleeve. Under the action of the taper sleeve, the expansion sleeve expands outwards to fix the gear blank. The expansion sleeve and the taper sleeve are in contact through a smooth surface, which can effectively ensure the coaxiality requirement, and the processing is convenient, which can effectively reduce the processing cost of the tooling, and further reduce the production cost of gear processing such as hobbing.

[0035] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0036] The above-described embodiments only represent several specific implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A tooling for gear processing, characterized in that, include: The base, cone sleeve, expansion sleeve and gland are coaxially matched and arranged in sequence, wherein: The base, cone sleeve, expansion sleeve and gland are all hollow structures to form a core shaft mounting hole coaxial with the axis, and the base is fixedly connected to the cone sleeve; The pressure cover is also extended along the inner wall of the core shaft mounting hole to the base, and is elastically connected to the base via a first axial spring.

2. The tooling for gear processing according to claim 1, characterized in that, The pressure cover includes a first pressure cover and a second pressure cover in a T shape, the cap end of the first pressure cover is elastically connected to the base through the first axial spring, the bottom end of the first pressure cover is docked with the bottom end of the second pressure cover, and the cap end cover of the second pressure cover is arranged on the top of the expansion sleeve.

3. The tooling for gear processing according to claim 2, wherein A mounting groove is also provided at the top of the base, the first pressure cover is arranged in the mounting groove, and the size of the mounting groove is larger than the size of the cap end of the first pressure cover to form a gap between the mounting groove and the first pressure cover, and the cone sleeve is also extended to the gap.

4. The tooling for gear processing according to claim 2, wherein, The second gland is also fixedly connected to the expansion sleeve via bolts.

5. The tooling for gear processing according to claim 2, characterized in that, The outer side wall of the second gland is further provided with a limiting groove, and the cone sleeve is further provided with a limiting rod, which extends to be arranged in the limiting groove.

6. The tooling for gear processing according to claim 1, characterized in that, It also includes a spacer, which is arranged at the top end of the cone sleeve and located between the cone sleeve and the gland.

7. The tooling for gear processing according to claim 1, characterized in that, It also includes a core shaft, which can be installed in the core shaft installation hole and is clamped and fixedly connected to the base. A pressure cover base is also fixedly arranged on the core shaft so that the pressure cover can be pressed through the pressure cover base when the core shaft is clamped and fixed with the base.

8. The tooling for gear processing according to claim 7, characterized in that, A first gear positioning member is sleeved outside the cone sleeve, and a second gear positioning member is arranged on the pressure cover base. Both the first gear positioning member and the second gear positioning member are concave structures, and the limiting edges of the concave structures are aligned with the tooth root positions of the gear blank.

9. The tooling for gear processing according to claim 8, wherein The pressure cover base includes a fixed seat and a movable seat, the movable seat is arranged in the fixed seat and interlocked, the fixed seat and the core shaft base of the core shaft are fixedly connected by bolts, and the movable seat and the core shaft base are elastically connected by a second axial spring, and the elastic coefficient of the second axial spring is greater than the elastic coefficient of the first axial spring.

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