Radial centering and axial pressing structure and milling machine fixture

Abstract

The utility model relates to a radial centering and axial pressing structure and a milling machine fixture, and the radial centering and axial pressing structure comprises a fixed seat, a fixed seat and a pressing block, the fixed disc is located in the sliding cavity; the pressing assembly comprises a plurality of pressing pieces arranged in the circumferential direction of the workpiece machining end of the fixing base. The pressing piece is rotationally connected to the workpiece machining end. The centering assembly comprises a wedge-shaped block and a plurality of clamping pieces connected with the wedge-shaped block in a sliding mode; the elastic piece is positioned between the wedge-shaped block and the fixed disc; and the driving rod is arranged in the sliding cavity in a penetrating mode and fixedly connected with the fixing disc, and one end of the driving rod penetrates through the wedge-shaped block and is rotationally connected to one end of the pressing piece. Due to the fact that the radial centering assembly and the axial pressing assembly are arranged, the device is more stable in the machining process, and the machining precision is higher.

Description

TECHNICAL FIELD

[0001] The application relates to the field of milling machine clamps, in particular to a radial centering and axial pressing structure and a milling machine clamp. BACKGROUND

[0002] The clutch armature disc is an important component of the clutch, and the machining precision thereof directly affects the performance of the clutch. The traditional clutch armature disc clamping mode usually adopts a fixed cylinder to position the center of the part, which is inconvenient to clamp. In addition, due to the clamping gap between the fixed cylinder and the center hole of the part, a positioning deviation of the center hole of the part occurs in the axial pressing process, thereby reducing the machining precision. SUMMARY

[0003] The radial centering and axial pressing structure and the milling machine clamp provided by the application can solve the problem of inconvenient clamping and reduced machining precision caused by the positioning deviation of the center hole of the part in the axial pressing process due to the clamping gap between the fixed cylinder and the center hole of the part in the related art.

[0004] In a first aspect, a radial centering and axial pressing structure is provided, which comprises:

[0005] A fixed seat is provided with a sliding cavity inside;

[0006] A fixed disc is located in the sliding cavity;

[0007] A pressing assembly comprises a plurality of pressing pieces arranged in the circumferential direction of the workpiece machining end of the fixed seat; the pressing pieces are rotationally connected to the workpiece machining end;

[0008] A centering assembly comprises a wedge-shaped block and a plurality of clamping pieces in sliding connection with the wedge-shaped block;

[0009] An elastic piece is located between the wedge-shaped block and the fixed disc;

[0010] A driving rod is provided through the sliding cavity and fixedly connected with the fixed disc, one end of the driving rod passes through the wedge-shaped block and is rotationally connected to one end of the pressing piece.

[0011] In some embodiments, the pressing assembly comprises a universal ball head fixedly installed above the driving rod, the universal ball head movably connects a supporting seat and a connecting seat, the supporting seat and the connecting seat are movably clamped, a spherical cavity for accommodating the universal ball head is arranged between the supporting seat and the connecting seat, the diameter of the universal ball head is smaller than the diameter of the spherical cavity, and one end of the pressing piece is hingedly connected to the connecting seat.

[0012] In some embodiments, the centering assembly comprises at least three clamping members, and the wedge block is provided with a number of inclined grooves matching the number of clamping members, and the upper end of the inclined groove is inclined to the center of the wedge block.

[0013] In some embodiments, the fixing seat comprises a base, and the upper end of the base is fixedly installed with an inner ring, and the inner ring is circumferentially and uniformly provided with a plurality of installation grooves, and the installation grooves are arranged in the radial direction.

[0014] In some embodiments, the inner ring is fixedly installed with a number of installation seats equal to the number of the pressing members, and the installation seats are arranged in the installation grooves in an interlaced manner with the clamping members, and the upper end of the installation seat is rotationally connected with the pressing member.

[0015] In some embodiments, the upper end of the inner ring is fixedly installed with a limiting ring, and the clamping member is slidingly connected between the inner ring and the limiting ring.

[0016] In some embodiments, the fixing seat is fixedly installed with an outer ring, and the inner diameter of the outer ring is greater than the outer diameter of the inner ring, and the gap between the inner ring and the outer ring can accommodate the workpiece.

[0017] In some embodiments, the wedge block is provided with a groove, and the support seat is slidingly connected in the groove.

[0018] In some embodiments, the elastic member is sleeved on the driving rod, and the two ends of the elastic member are fixedly connected with the bottom of the wedge block and the upper end of the fixing disc, respectively.

[0019] In a second aspect, a milling machine clamp is provided, comprising the radial centering and axial pressing structure.

[0020] The radial centering and axial pressing structure and the milling machine clamp provided by the embodiments of the present application have the following advantages: the upper end of the driving rod is hingedly connected with the pressing member, the middle part of the pressing member is rotationally connected with the fixing seat, forming a lever structure, when the driving rod rises, the plurality of pressing members rotate around the middle part, the end of the pressing member close to the driving rod rises, and the end of the pressing member away from the driving rod descends, thereby axially pressing the workpiece; at the same time, when the driving rod rises, the fixing disc fixedly connected with the driving rod moves upward, the elastic force of the elastic member drives the wedge block to move upward, and the clamping member slidingly connected with the wedge block slides away from the driving rod, thereby radially centering the inner hole of the workpiece. The elastic member is arranged between the pressing assembly and the centering assembly to decompose the power source, thereby avoiding the stroke interference of the radial centering and axial pressing of the inner hole and ensuring that both functions can be normally realized. Therefore, the present application is more stable during the machining process and has higher machining precision. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0022] Figure 1 A schematic diagram of a planar structure of the radial centering and axial compression structure provided by the embodiments of the present application is shown in the figure.

[0023] Figure 2 A schematic diagram of an A-A cross-sectional structure of the radial centering and axial compression structure provided by the embodiments of the present application is shown in the figure.

[0024] Figure 3 A schematic diagram of a planar structure of the radial centering and axial compression structure provided by the embodiments of the present application is shown in the figure.

[0025] Figure 4 A schematic diagram of a workpiece structure provided by the embodiments of the present application is shown in the figure.

[0026] In the figure: 1, fixed seat; 101, base; 102, inner ring; 103, mounting groove; 104, limiting ring; 105, outer ring; 2, driving rod; 3, fixed disc; 4, elastic member; 5, compression member; 6, clamping member; 7, wedge block; 8, inclined groove; 9, recess; 10, universal ball head; 11, support seat; 12, connecting seat; 13, mounting seat; 14, workpiece. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0028] The embodiments of the present application provide a radial centering and axial compression structure, which can solve the problem that in the related art, the traditional clamping method cannot simultaneously achieve radial centering and synchronous axial compression, so that deviation is prone to occur in the workpiece machining process, thereby affecting the machining precision.

[0029] Figure 4 A schematic diagram of a structure of a clutch armature disc is shown in the figure, which has a certain thickness and diameter, and a circular hole is arranged in the middle. During the machining process, the clutch armature disc needs to be fixed to facilitate the slotting of the end face.

[0030] Embodiment 1:

[0031] like Figures 1 to 3 As shown, a radial centering and axial clamping structure includes: a fixed base 1, a centering assembly, and a clamping assembly.

[0032] The fixed base 1 has a sliding cavity, and a drive rod 2 is slidably connected to the sliding cavity in the vertical direction. The bottom of the drive rod 2 is fixedly connected to the output end of the cylinder or other external power source, which can make the drive rod 2 move up and down. A fixed plate 3 is fixedly installed on the drive rod 2, and an elastic element 4 is sleeved on the drive rod 2. Preferably, the elastic element 4 is a rectangular spring. The lower end of the elastic element 4 is fixedly connected to the upper end face of the fixed plate 3. The rectangular spring can decompose the power source and avoid stroke interference between the radial centering of the inner hole and the axial compression, ensuring that both functions can be realized normally.

[0033] The centering assembly includes a wedge block 7 and a clamping member 6 that is slidably connected to the wedge block 7. The upper end of the elastic member 4 is fixedly connected to the lower end of the wedge block 7. The clamping member 6 is radially slidably connected to the fixed seat 1. When the drive rod 2 rises or falls, it drives the clamping members 6 to move away from or closer to each other, thereby radially pressing or releasing the workpiece 14.

[0034] Furthermore, there are three clamping members 6 and three inclined grooves 8 on the wedge block 7. The clamping members 6 are slidably connected to the wedge block 7 through the inclined grooves 8, and the upper end of the inclined grooves 8 is inclined toward the center of the wedge block 7.

[0035] Furthermore, the fixing base 1 includes an annular base 101. An inner ring 102 is fixedly installed on the upper end of the base 101 by bolts. The inner ring 102 is evenly provided with 6 mounting grooves 103 in the circumferential direction. The mounting grooves 103 are arranged radially. 3 clamping members 6 are spaced apart in the mounting grooves 103 and are slidably connected to the inner ring 102 through the mounting grooves 103.

[0036] Furthermore, a limiting ring 104 is fixedly installed on the inner ring 102 by bolts, and the clamping member 6 is slidably connected between the inner ring 102 and the limiting ring 104. The limiting ring 104 causes the clamping member 6 to move along the radius of the circle and will not follow the up and down movement of the wedge block 7.

[0037] Furthermore, the wedge block 7 is provided with a groove 9, and the support seat 11 is slidably connected in the groove 9. The support seat 11 is set in the groove 9, which makes the structure more compact and can simultaneously satisfy axial compression and radial fixation.

[0038] The clamping assembly includes a universal ball joint 10 fixedly mounted above the drive rod 2. The universal ball joint 10 is movably connected to a support base 11 and a connecting base 12, which are movably engaged. A spherical cavity is provided between the support base 11 and the connecting base 12 to accommodate the universal ball joint 10. The diameter of the universal ball joint 10 is smaller than the diameter of the spherical cavity. The connecting base 12 can swing around the universal ball joint 10, increasing flexibility during the clamping process.

[0039] Further, three pressing members 5 are hingedly connected to the upper end of the connecting seat 12, and the three pressing members 5 are uniformly arranged in the circumferential direction, and each pressing member 5 is arranged in the radial direction, and the pressing member 5 is hingedly connected to the connecting seat 12 near one end of the driving rod 2.

[0040] Further, three mounting seats 13 are fixedly installed on the inner ring 102, the three mounting seats 13 are fixedly installed in the mounting groove 103 through bolts, the three mounting seats 13 are staggered with the three clamping members 6, so that the clamping and the pressing do not affect each other, and the clamping is more stable. The mounting seat 13 is arranged in an L shape, the horizontal end of the L-shaped mounting seat 13 is fixedly installed on the inner ring 102, and the upper end of the L-shaped mounting seat 13 is rotatably connected to the middle part of the pressing member 5, so that the pressing member 5 can rotate around the mounting seat 13. The driving rod 2 rises or falls to drive the pressing member 5 to rotate around the middle part, and the workpiece 14 is axially pressed or loosened.

[0041] In some optional embodiments, the fixed seat 1 is fixedly installed with an outer ring 105, the outer ring 105 is used to provide support for the workpiece, the inner diameter of the outer ring 105 is larger than the outer diameter of the inner ring 102, and the gap between the inner ring 102 and the outer ring 105 can be used to put the workpiece 14.

[0042] In some optional embodiments, one end of the pressing member 5 is hingedly connected to the connecting seat 12, and the other end is in a fan shape, so as to increase the contact area of the pressing member 5 and the workpiece.

[0043] Embodiment 2:

[0044] A milling machine clamp comprising the radial centering and axial pressing structure in embodiment 1, wherein the fixed seat 1 is fixedly installed on the milling machine.

[0045] Working principle of the present application:

[0046] The workpiece is placed between the inner ring 102 and the outer ring 105, the external power source drives the driving rod 2 to move upward, the three pressing members 5 rotate around the middle part, the pressing members 5 close to the one end of the driving rod 2 rise, the pressing members 5 away from the one end of the driving rod 2 drop, since the universal ball head 10 is fixedly connected on the driving rod 2, the universal ball head 10 drives the connecting seat 12 to move upward during the upward movement, the connecting seat 12 is movably connected with the supporting seat 11, the supporting seat 11 also moves upward, the connecting seat 12 can swing around the universal ball head 10, so that the three pressing members 5 in three directions do not interfere with the stroke, each pressing member 5 can effectively contact and press the workpiece, meanwhile, when the driving rod 2 rises, the fixed disc 3 fixedly connected with the driving rod 2 moves upward, the elastic member 4 drives the wedge block 7 to move upward, the clamping member 6 slidably connected with the wedge block 7 slides away from the driving rod 2, so that the inner hole of the workpiece is radially centered. The elastic member 4 is arranged between the pressing assembly and the centering assembly to decompose the power source, so that the radial centering and the axial pressing of the inner hole do not interfere with the stroke, and the two functions can be normally realized.

[0047] After the milling machine mills the end face of the workpiece, the external power source drives the driving rod 2 to move downward, the universal ball head 10 drives the supporting seat 11 and the connecting seat 12 to move downward along the groove 9, the three pressing members 5 reversely rotate around the middle part, the pressing members 5 close to the one end of the driving rod 2 drop, the pressing members 5 away from the one end of the driving rod 2 rise, so that the workpiece is radially loosened, meanwhile, the fixed disc 3 fixedly connected with the driving rod 2 moves downward, the elastic member 4 drives the wedge block 7 to move downward, the clamping member 6 slidably connected with the wedge block 7 slides to be close to the driving rod 2, so that the workpiece is loosened, and the workpiece can be taken out.

[0048] In the description of the present application, it should be noted that the terms "upper", "lower", 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 on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements inside. 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.

[0049] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0050] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

Claims

1. A radial centering and axial compression structure, characterized in that, The utility model relates to a radial centering and axial pressing structure, which comprises a fixed seat (1) with a sliding cavity, a fixed disc (3) in the sliding cavity, a pressing assembly comprising a plurality of pressing pieces (5) arranged along the circumference of the workpiece processing end of the fixed seat (1), the pressing pieces (5) being rotationally connected to the workpiece processing end, a centering assembly comprising a wedge block (7) and a plurality of clamping pieces (6) slidingly connected to the wedge block (7), an elastic piece (4) between the wedge block (7) and the fixed disc (3), a drive rod (2) passing through the sliding cavity and fixedly connected to the fixed disc (3), one end of the drive rod (2) passing through the wedge block (7) and being rotationally connected to one end of the pressing piece (5).

2. The radial centering and axial pressing structure according to claim 1, wherein the pressing assembly comprises a universal ball head (10) fixedly installed above the drive rod (2), the universal ball head (10) being movably connected to a support seat (11) and a connecting seat (12), the support seat (11) and the connecting seat (12) being movably clamped, a spherical cavity for accommodating the universal ball head (10) being provided between the support seat (11) and the connecting seat (12), the diameter of the universal ball head (10) being smaller than the diameter of the spherical cavity, and one end of the pressing piece (5) being hingedly connected to the connecting seat (12).

3. The radial centering and axial pressing structure according to claim 1, wherein the centering assembly comprises at least three clamping pieces (6), the wedge block (7) being provided with a number of inclined grooves (8) corresponding to the number of the clamping pieces (6), the upper ends of the inclined grooves (8) being inclined towards the center of the wedge block (7).

4. The radial centering and axial pressing structure according to claim 1, wherein the fixed seat (1) comprises a base (101), the upper end of the base (101) being fixedly installed with an inner ring (102), the inner ring (102) being uniformly provided with a number of installation grooves (103) along the circumference, the installation grooves (103) being arranged radially.

5. The radial centering and axial pressing structure according to claim 4, wherein the inner ring (102) is fixedly installed with a number of installation seats (13) corresponding to the number of the pressing pieces (5), the installation seats (13) and the clamping pieces (6) being alternately arranged in the installation grooves (103), and the upper end of the installation seat (13) being rotationally connected to the pressing piece (5).

6. The radial centering and axial pressing structure according to claim 4, wherein the upper end of the inner ring (102) is fixedly installed with a limiting ring (104), and the clamping piece (6) is slidingly connected between the inner ring (102) and the limiting ring (104).

7. The radial centering and axial pressing structure according to claim 4, wherein the fixed seat (1) is fixedly installed with an outer ring (105), the inner diameter of the outer ring (105) being larger than the outer diameter of the inner ring (102), and the gap between the inner ring (102) and the outer ring (105) being capable of accommodating the workpiece (14). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 8. The radial centering and axial compression structure according to claim 2, characterized in that: The wedge-shaped block (7) is provided with a groove (9), and the support seat (11) is slidingly connected in the groove (9).

9. The radial centering and axial compression structure according to claim 1, characterized in that: The elastic member (4) is sleeved on the driving rod (2), and two ends thereof are fixedly connected with the bottom of the wedge-shaped block (7) and the upper end of the fixed disc (3) respectively.

10. A milling machine fixture, characterized by: The radial centering and axial compression structure according to any one of claims 1 to 9.

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