Rotary internal spline clamping fixture
Through the design of the rotary internal spline clamping fixture and the use of the circumferential clamping force of the spline positioning body and the wedge block, the problem of reduced precision caused by wear of the internal spline contour expansion sleeve is solved, efficient and stable workpiece clamping is achieved and production costs are reduced.
Patent Information
- Application Number
- CN202422984459.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-04
AI Technical Summary
In the prior art, the internal spline contour expansion sleeve has high processing precision requirements and needs to be frequently replaced after wear, resulting in reduced product processing precision and increased production costs.
The rotary internal spline clamping fixture adopts the cooperation of the spline positioning body and the wedge block, and utilizes the circumferential clamping force instead of the radial clamping force to achieve stable clamping of the workpiece and prevent slipping.
It improves machining accuracy, reduces the problem of precision reduction caused by fixture wear, reduces replacement frequency and production costs, and improves production efficiency.
Smart Images
Figure CN223466185U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to spline fixture field, concretely relates to a rotary internal spline clamping fixture. BACKGROUND
[0002] At present, most of the automobile parts are assembled by taking spline as the reference, so the form and position tolerance reference on the functional surface or assembly surface of the spline part is spline, but the current machining workpiece with spline generally adopts the radial clamping internal spline copying expansion sleeve, and the internal spline copying expansion sleeve needs to be completely matched with the internal spline shape of the workpiece, which has high machining precision requirement for the internal spline copying expansion sleeve, and when the internal spline copying expansion sleeve is worn, it cannot be completely matched with the internal spline of the workpiece, so it is necessary to replace the new internal spline copying expansion sleeve, otherwise the product machining precision will be reduced, which is too high for the machining requirement of the internal spline copying expansion sleeve, and the fixture form needs to be frequently replaced, which brings too many changes to the production.
[0003] Therefore, it is necessary to provide a new technical scheme. UTILITY MODEL CONTENT
[0004] In order to solve the technical problems existing in the prior art, the utility model discloses a rotary internal spline clamping fixture, and the specific technical scheme is as follows:
[0005] The utility model provides a rotary internal spline clamping fixture, which comprises a fixture main body, a connecting rod, a first spline positioning body, a second spline positioning body, a first wedge and a second wedge,
[0006] The fixture main body is fixedly connected with the machine tool spindle through bolts, the middle of the fixture main body is provided with a boss protruding outward, the middle of the boss is provided with a connecting through hole penetrating through the fixture main body,
[0007] One end of the connecting rod protrudes out of the connecting through hole and is connected with the workpiece, the other end of the connecting rod is fixedly connected with the pull rod in the machine tool spindle, the pull rod drives the connecting rod to move forward and backward, and the end of the connecting rod connected with the workpiece is provided with a baffle,
[0008] The first spline positioning body and the second spline positioning body are circumferentially spaced apart outside the boss, and the first spline positioning body and the second spline positioning body are connected with the spline inside the workpiece,
[0009] The first wedge and the second wedge are respectively inserted between the first spline positioning body and the second spline positioning body to form a complete annular structure, the first wedge and the second wedge are respectively arranged in a positive and negative manner, the slope of the first wedge and the second wedge is arranged along the circumferential direction of the connecting rod, the first wedge and the second wedge are connected and fixed with the baffle of the connecting rod, and the first wedge and the second wedge are inserted into or out of the first spline positioning body and the second spline positioning body along with the movement of the connecting rod.
[0010] Further, the first positioning pin and the second positioning pin are further included, the top of the first wedge and the top of the second wedge are both provided with a positioning pin hole, the first positioning pin connects and fixes the first wedge and the baffle through the positioning pin hole on the first wedge, and the second positioning pin connects and fixes the second wedge and the baffle through the positioning pin hole on the second wedge.
[0011] Further, the small end of the first wedge is close to the clamp body, the small end of the second wedge is away from the clamp body, and the inner side surface of the first wedge and the inner side surface of the second wedge are both attached to the outer surface of the boss.
[0012] Further, the two sides of the first spline positioning body are respectively in contact with the inclined surfaces of the first wedge and the second wedge and are arranged as matched inclined surface structures, the two sides of the second spline positioning body are respectively in contact with the straight planes of the first wedge and the second wedge and are arranged as corresponding straight plane structures, and the straight planes are parallel to the axis direction of the connecting rod.
[0013] The utility model has the following beneficial effects:
[0014] 1、 the utility model provides a rotary internal spline clamping fixture, simple structure, clever design, convenient for production and reequipping.
[0015] 2、 the utility model provides a rotary internal spline clamping fixture, adopts the circumferential clamping force to replace the radial clamping expansion sleeve, and is positioned and clamped through the spline, and the effect of clamping and positioning is better, and the workpiece can be prevented from rotating and slipping.
[0016] 2、 the utility model provides a rotary internal spline clamping fixture, can eliminate the problem of reduced product machining precision caused by the wear of the fixture, and does not need to frequently replace the fixture, improves production efficiency and reduces machining cost.
[0017] Additional aspects and advantages of the utility model will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0019] Figure 1 is a perspective structural schematic view of the rotary internal spline clamping fixture provided by the embodiment of the present application.
[0020] Figure 2 is a structural schematic view of the spline positioning body provided by the embodiment of the present application.
[0021] The reference signs are: fixture main body 1, boss 11, connecting rod 2, baffle 21, first spline positioning body 3, second spline positioning body 4, first wedge block 5, second wedge block 6, first positioning pin 7 and second positioning pin 8. DETAILED DESCRIPTION
[0022] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.
[0023] In the description of the present application, it is understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.
[0024] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0025] The utility model discloses a rotary inner spline clamping fixture, reference Figure 1 And Figure 2 , including clamp main part 1, connecting rod 2, first spline positioning body 3, second spline positioning body 4, first wedge 5, second wedge 6, first positioning pin 7 and second positioning pin 8.
[0026] Clamp main part 1 is fixedly connected through bolt and lathe main shaft, the middle of clamp main part 1 is provided with the boss 11 that projects outward, the boss 11 is provided with the connecting through -hole that is passed through clamp main part 1, one end of connecting rod 2 projects the connecting through -hole and workpiece connection, the other end of connecting rod 2 and the draw bar in lathe main shaft fixed connection, the draw bar drives connecting rod 2 moves back and forth, and the one end of connecting rod 2 and workpiece connection is provided with baffle 21.
[0027] First spline positioning body 3 and second spline positioning body 4 are spaced apart along the circumference outside boss 11, and first spline positioning body 3 and second spline positioning body 4 are connected to the spline inside workpiece.
[0028] First wedge 5 and second wedge 6 are respectively inserted between first spline positioning body 3 and second spline positioning body 4 to form a complete annular structure, first wedge 5 and second wedge 6 are respectively arranged in positive and negative, and the slope of first wedge 5 and second wedge 6 is arranged along the circumference of connecting rod 2, first wedge 5 and second wedge 6 are connected and fixed with baffle 21 of connecting rod 2, and first wedge 5 and second wedge 6 are inserted into or out of first spline positioning body 3 and second spline positioning body 4 along with the movement of connecting rod 2.
[0029] The top of first wedge 5 and second wedge 6 is provided with a positioning pin hole, first positioning pin 7 is connected and fixed with first wedge 5 and baffle 21 through the positioning pin hole on first wedge 5, and second positioning pin 8 is connected and fixed with second wedge 6 and baffle 21 through the positioning pin hole on second wedge 6.
[0030] The small end of first wedge 5 is close to clamp main part 1, the small end of second wedge 6 is away from clamp main part 1, and the inner side surface of first wedge 5 and second wedge 6 is attached to the outer surface of boss 11.
[0031] The two sides of the first spline positioning body 3 are in contact with the inclined surfaces of the first wedge block 5 and the second wedge block 6 respectively and are arranged as matched inclined surface structures, the two sides of the second spline positioning body 4 are in contact with the straight planes of the first wedge block 5 and the second wedge block 6 respectively and are arranged as corresponding straight plane structures, and the straight planes are parallel to the axial direction of the connecting rod 2.
[0032] The working principle of the utility model is: the outer surfaces of the two spline positioning bodies are connected with the spline positioning of the inner side of the workpiece, when the baffle of the connecting rod is pulled to move towards the fixture main body, the first wedge block is pushed outwards to push the spline positioning bodies on both sides, the workpiece is clamped through the static friction force between the spline positioning bodies and the spline of the workpiece, at this time, the second wedge block increases the gap with the spline positioning bodies on both sides and does not affect the clamping of the first wedge block, when the baffle of the connecting rod is pushed away from the fixture main body, the second wedge block moves reversely, thereby releasing the workpiece and the spline positioning bodies.
[0033] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a 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 utility model. In the present specification, the illustrative description 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. In addition, the person skilled in the art can combine and combine different embodiments or examples described in the present specification.
[0034] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the person skilled in the art can change, modify and modify the above embodiments within the scope of the utility model.
Claims
1. A rotary internal spline clamping fixture, characterized by, The utility model relates to a fixture, including fixture body, connecting rod, first spline positioning body, second spline positioning body, first wedge and second wedge, The fixture body is fixedly connected through bolt and lathe main shaft, the middle of fixture body is provided with the boss that protrudes outward, the boss middle is provided with the connecting through hole that passes through the fixture body, One end of the connecting rod protrudes from the connecting through hole and is connected with the workpiece, the other end of the connecting rod is fixedly connected with the pull rod in the lathe main shaft, the pull rod drives the connecting rod to move forward and backward, the end of the connecting rod connected with the workpiece is provided with a baffle, The first spline positioning body and the second spline positioning body are arranged at intervals along the circumference outside the boss, the first spline positioning body and the second spline positioning body are connected with the spline inside the workpiece, The first wedge and the second wedge are respectively inserted between the first spline positioning body and the second spline positioning body to form a complete annular structure, the first wedge and the second wedge are respectively arranged in positive and reverse, the slope of the first wedge and the second wedge is arranged along the circumference of the connecting rod, the first wedge and the second wedge are fixedly connected with the baffle of the connecting rod, the first wedge and the second wedge are inserted into or protrude out of the first spline positioning body and the second spline positioning body along with the movement of the connecting rod.
2. The rotary internal spline chucking fixture according to claim 1, wherein It also includes a first positioning pin and a second positioning pin, the top of the first wedge and the second wedge is provided with a positioning pin hole, the first positioning pin connects and fixes the first wedge and the baffle through the positioning pin hole on the first wedge, the second positioning pin connects and fixes the second wedge and the baffle through the positioning pin hole on the second wedge.
3. The rotary internal spline chucking fixture according to claim 1, wherein The small end of the first wedge is close to the fixture body, the small end of the second wedge is away from the fixture body, the inner side surface of the first wedge and the second wedge is matched with the outer surface of the boss.
4. The rotary internal spline chucking fixture according to claim 3, wherein The two sides of the first spline positioning body are respectively in contact with the inclined surface of the first wedge and the second wedge and are arranged as matched inclined surface structure, the two sides of the second spline positioning body are respectively in contact with the straight plane of the first wedge and the second wedge and are arranged as corresponding straight plane structure, the straight plane is parallel to the axis direction of the connecting rod.